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php-src/Zend/zend_compile.c
Nikita Popov 9c23a50939 Merge branch 'PHP-7.4' 
* PHP-7.4:
  Fixed bug #79155
2020-01-23 12:55:59 +01:00

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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) Zend Technologies Ltd. (http://www.zend.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 2.00 of the Zend license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.zend.com/license/2_00.txt. |
| If you did not receive a copy of the Zend license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@zend.com so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <andi@php.net> |
| Zeev Suraski <zeev@php.net> |
| Nikita Popov <nikic@php.net> |
+----------------------------------------------------------------------+
*/
#include <zend_language_parser.h>
#include "zend.h"
#include "zend_compile.h"
#include "zend_constants.h"
#include "zend_llist.h"
#include "zend_API.h"
#include "zend_exceptions.h"
#include "zend_interfaces.h"
#include "zend_virtual_cwd.h"
#include "zend_multibyte.h"
#include "zend_language_scanner.h"
#include "zend_inheritance.h"
#include "zend_vm.h"
#define SET_NODE(target, src) do { \
target ## _type = (src)->op_type; \
if ((src)->op_type == IS_CONST) { \
target.constant = zend_add_literal(&(src)->u.constant); \
} else { \
target = (src)->u.op; \
} \
} while (0)
#define GET_NODE(target, src) do { \
(target)->op_type = src ## _type; \
if ((target)->op_type == IS_CONST) { \
ZVAL_COPY_VALUE(&(target)->u.constant, CT_CONSTANT(src)); \
} else { \
(target)->u.op = src; \
} \
} while (0)
#define FC(member) (CG(file_context).member)
typedef struct _zend_loop_var {
zend_uchar opcode;
zend_uchar var_type;
uint32_t var_num;
uint32_t try_catch_offset;
} zend_loop_var;
static inline uint32_t zend_alloc_cache_slots(unsigned count) {
if (count == 0) {
return (uint32_t) -1;
}
zend_op_array *op_array = CG(active_op_array);
uint32_t ret = op_array->cache_size;
op_array->cache_size += count * sizeof(void*);
return ret;
}
static inline uint32_t zend_alloc_cache_slot(void) {
return zend_alloc_cache_slots(1);
}
ZEND_API zend_op_array *(*zend_compile_file)(zend_file_handle *file_handle, int type);
ZEND_API zend_op_array *(*zend_compile_string)(zval *source_string, const char *filename);
#ifndef ZTS
ZEND_API zend_compiler_globals compiler_globals;
ZEND_API zend_executor_globals executor_globals;
#endif
static zend_op *zend_emit_op(znode *result, zend_uchar opcode, znode *op1, znode *op2);
static zend_bool zend_try_ct_eval_array(zval *result, zend_ast *ast);
static void init_op(zend_op *op)
{
MAKE_NOP(op);
op->extended_value = 0;
op->lineno = CG(zend_lineno);
}
static zend_always_inline uint32_t get_next_op_number(void)
{
return CG(active_op_array)->last;
}
static zend_op *get_next_op(void)
{
zend_op_array *op_array = CG(active_op_array);
uint32_t next_op_num = op_array->last++;
zend_op *next_op;
if (UNEXPECTED(next_op_num >= CG(context).opcodes_size)) {
CG(context).opcodes_size *= 4;
op_array->opcodes = erealloc(op_array->opcodes, CG(context).opcodes_size * sizeof(zend_op));
}
next_op = &(op_array->opcodes[next_op_num]);
init_op(next_op);
return next_op;
}
static zend_brk_cont_element *get_next_brk_cont_element(void)
{
CG(context).last_brk_cont++;
CG(context).brk_cont_array = erealloc(CG(context).brk_cont_array, sizeof(zend_brk_cont_element) * CG(context).last_brk_cont);
return &CG(context).brk_cont_array[CG(context).last_brk_cont-1];
}
static void zend_destroy_property_info_internal(zval *zv) /* {{{ */
{
zend_property_info *property_info = Z_PTR_P(zv);
zend_string_release(property_info->name);
zend_type_release(property_info->type, /* persistent */ 1);
free(property_info);
}
/* }}} */
static zend_string *zend_build_runtime_definition_key(zend_string *name, uint32_t start_lineno) /* {{{ */
{
zend_string *filename = CG(active_op_array)->filename;
zend_string *result = zend_strpprintf(0, "%c%s%s:%" PRIu32 "$%" PRIx32,
'\0', ZSTR_VAL(name), ZSTR_VAL(filename), start_lineno, CG(rtd_key_counter)++);
return zend_new_interned_string(result);
}
/* }}} */
static zend_bool zend_get_unqualified_name(const zend_string *name, const char **result, size_t *result_len) /* {{{ */
{
const char *ns_separator = zend_memrchr(ZSTR_VAL(name), '\\', ZSTR_LEN(name));
if (ns_separator != NULL) {
*result = ns_separator + 1;
*result_len = ZSTR_VAL(name) + ZSTR_LEN(name) - *result;
return 1;
}
return 0;
}
/* }}} */
struct reserved_class_name {
const char *name;
size_t len;
};
static const struct reserved_class_name reserved_class_names[] = {
{ZEND_STRL("bool")},
{ZEND_STRL("false")},
{ZEND_STRL("float")},
{ZEND_STRL("int")},
{ZEND_STRL("null")},
{ZEND_STRL("parent")},
{ZEND_STRL("self")},
{ZEND_STRL("static")},
{ZEND_STRL("string")},
{ZEND_STRL("true")},
{ZEND_STRL("void")},
{ZEND_STRL("iterable")},
{ZEND_STRL("object")},
{NULL, 0}
};
static zend_bool zend_is_reserved_class_name(const zend_string *name) /* {{{ */
{
const struct reserved_class_name *reserved = reserved_class_names;
const char *uqname = ZSTR_VAL(name);
size_t uqname_len = ZSTR_LEN(name);
zend_get_unqualified_name(name, &uqname, &uqname_len);
for (; reserved->name; ++reserved) {
if (uqname_len == reserved->len
&& zend_binary_strcasecmp(uqname, uqname_len, reserved->name, reserved->len) == 0
) {
return 1;
}
}
return 0;
}
/* }}} */
void zend_assert_valid_class_name(const zend_string *name) /* {{{ */
{
if (zend_is_reserved_class_name(name)) {
zend_error_noreturn(E_COMPILE_ERROR,
"Cannot use '%s' as class name as it is reserved", ZSTR_VAL(name));
}
}
/* }}} */
typedef struct _builtin_type_info {
const char* name;
const size_t name_len;
const zend_uchar type;
} builtin_type_info;
static const builtin_type_info builtin_types[] = {
{ZEND_STRL("null"), IS_NULL},
{ZEND_STRL("false"), IS_FALSE},
{ZEND_STRL("int"), IS_LONG},
{ZEND_STRL("float"), IS_DOUBLE},
{ZEND_STRL("string"), IS_STRING},
{ZEND_STRL("bool"), _IS_BOOL},
{ZEND_STRL("void"), IS_VOID},
{ZEND_STRL("iterable"), IS_ITERABLE},
{ZEND_STRL("object"), IS_OBJECT},
{NULL, 0, IS_UNDEF}
};
typedef struct {
const char *name;
size_t name_len;
const char *correct_name;
} confusable_type_info;
static const confusable_type_info confusable_types[] = {
{ZEND_STRL("boolean"), "bool"},
{ZEND_STRL("integer"), "int"},
{ZEND_STRL("double"), "float"},
{ZEND_STRL("resource"), NULL},
{NULL, 0, NULL},
};
static zend_always_inline zend_uchar zend_lookup_builtin_type_by_name(const zend_string *name) /* {{{ */
{
const builtin_type_info *info = &builtin_types[0];
for (; info->name; ++info) {
if (ZSTR_LEN(name) == info->name_len
&& zend_binary_strcasecmp(ZSTR_VAL(name), ZSTR_LEN(name), info->name, info->name_len) == 0
) {
return info->type;
}
}
return 0;
}
/* }}} */
static zend_always_inline zend_bool zend_is_confusable_type(const zend_string *name, const char **correct_name) /* {{{ */
{
const confusable_type_info *info = confusable_types;
/* Intentionally using case-sensitive comparison here, because "integer" is likely intended
* as a scalar type, while "Integer" is likely a class type. */
for (; info->name; ++info) {
if (ZSTR_LEN(name) == info->name_len
&& memcmp(ZSTR_VAL(name), info->name, info->name_len) == 0
) {
*correct_name = info->correct_name;
return 1;
}
}
return 0;
}
/* }}} */
static void *zend_hash_find_ptr_lc(HashTable *ht, const char *str, size_t len) {
void *result;
zend_string *lcname;
ALLOCA_FLAG(use_heap);
ZSTR_ALLOCA_ALLOC(lcname, len, use_heap);
zend_str_tolower_copy(ZSTR_VAL(lcname), str, len);
result = zend_hash_find_ptr(ht, lcname);
ZSTR_ALLOCA_FREE(lcname, use_heap);
return result;
}
static zend_bool zend_is_not_imported(zend_string *name) {
/* Assuming "name" is unqualified here. */
return !FC(imports)
|| zend_hash_find_ptr_lc(FC(imports), ZSTR_VAL(name), ZSTR_LEN(name)) == NULL;
}
void zend_oparray_context_begin(zend_oparray_context *prev_context) /* {{{ */
{
*prev_context = CG(context);
CG(context).opcodes_size = INITIAL_OP_ARRAY_SIZE;
CG(context).vars_size = 0;
CG(context).literals_size = 0;
CG(context).fast_call_var = -1;
CG(context).try_catch_offset = -1;
CG(context).current_brk_cont = -1;
CG(context).last_brk_cont = 0;
CG(context).brk_cont_array = NULL;
CG(context).labels = NULL;
}
/* }}} */
void zend_oparray_context_end(zend_oparray_context *prev_context) /* {{{ */
{
if (CG(context).brk_cont_array) {
efree(CG(context).brk_cont_array);
CG(context).brk_cont_array = NULL;
}
if (CG(context).labels) {
zend_hash_destroy(CG(context).labels);
FREE_HASHTABLE(CG(context).labels);
CG(context).labels = NULL;
}
CG(context) = *prev_context;
}
/* }}} */
static void zend_reset_import_tables(void) /* {{{ */
{
if (FC(imports)) {
zend_hash_destroy(FC(imports));
efree(FC(imports));
FC(imports) = NULL;
}
if (FC(imports_function)) {
zend_hash_destroy(FC(imports_function));
efree(FC(imports_function));
FC(imports_function) = NULL;
}
if (FC(imports_const)) {
zend_hash_destroy(FC(imports_const));
efree(FC(imports_const));
FC(imports_const) = NULL;
}
}
/* }}} */
static void zend_end_namespace(void) /* {{{ */ {
FC(in_namespace) = 0;
zend_reset_import_tables();
if (FC(current_namespace)) {
zend_string_release_ex(FC(current_namespace), 0);
FC(current_namespace) = NULL;
}
}
/* }}} */
void zend_file_context_begin(zend_file_context *prev_context) /* {{{ */
{
*prev_context = CG(file_context);
FC(imports) = NULL;
FC(imports_function) = NULL;
FC(imports_const) = NULL;
FC(current_namespace) = NULL;
FC(in_namespace) = 0;
FC(has_bracketed_namespaces) = 0;
FC(declarables).ticks = 0;
zend_hash_init(&FC(seen_symbols), 8, NULL, NULL, 0);
}
/* }}} */
void zend_file_context_end(zend_file_context *prev_context) /* {{{ */
{
zend_end_namespace();
zend_hash_destroy(&FC(seen_symbols));
CG(file_context) = *prev_context;
}
/* }}} */
void zend_init_compiler_data_structures(void) /* {{{ */
{
zend_stack_init(&CG(loop_var_stack), sizeof(zend_loop_var));
zend_stack_init(&CG(delayed_oplines_stack), sizeof(zend_op));
CG(active_class_entry) = NULL;
CG(in_compilation) = 0;
CG(skip_shebang) = 0;
CG(encoding_declared) = 0;
CG(memoized_exprs) = NULL;
CG(memoize_mode) = 0;
}
/* }}} */
static void zend_register_seen_symbol(zend_string *name, uint32_t kind) {
zval *zv = zend_hash_find(&FC(seen_symbols), name);
if (zv) {
Z_LVAL_P(zv) |= kind;
} else {
zval tmp;
ZVAL_LONG(&tmp, kind);
zend_hash_add_new(&FC(seen_symbols), name, &tmp);
}
}
static zend_bool zend_have_seen_symbol(zend_string *name, uint32_t kind) {
zval *zv = zend_hash_find(&FC(seen_symbols), name);
return zv && (Z_LVAL_P(zv) & kind) != 0;
}
ZEND_API void file_handle_dtor(zend_file_handle *fh) /* {{{ */
{
zend_file_handle_dtor(fh);
}
/* }}} */
void init_compiler(void) /* {{{ */
{
CG(arena) = zend_arena_create(64 * 1024);
CG(active_op_array) = NULL;
memset(&CG(context), 0, sizeof(CG(context)));
zend_init_compiler_data_structures();
zend_init_rsrc_list();
zend_hash_init(&CG(filenames_table), 8, NULL, ZVAL_PTR_DTOR, 0);
zend_llist_init(&CG(open_files), sizeof(zend_file_handle), (void (*)(void *)) file_handle_dtor, 0);
CG(unclean_shutdown) = 0;
CG(delayed_variance_obligations) = NULL;
CG(delayed_autoloads) = NULL;
}
/* }}} */
void shutdown_compiler(void) /* {{{ */
{
zend_stack_destroy(&CG(loop_var_stack));
zend_stack_destroy(&CG(delayed_oplines_stack));
zend_hash_destroy(&CG(filenames_table));
zend_arena_destroy(CG(arena));
if (CG(delayed_variance_obligations)) {
zend_hash_destroy(CG(delayed_variance_obligations));
FREE_HASHTABLE(CG(delayed_variance_obligations));
CG(delayed_variance_obligations) = NULL;
}
if (CG(delayed_autoloads)) {
zend_hash_destroy(CG(delayed_autoloads));
FREE_HASHTABLE(CG(delayed_autoloads));
CG(delayed_autoloads) = NULL;
}
}
/* }}} */
ZEND_API zend_string *zend_set_compiled_filename(zend_string *new_compiled_filename) /* {{{ */
{
zval *p, rv;
if ((p = zend_hash_find(&CG(filenames_table), new_compiled_filename))) {
ZEND_ASSERT(Z_TYPE_P(p) == IS_STRING);
CG(compiled_filename) = Z_STR_P(p);
return Z_STR_P(p);
}
new_compiled_filename = zend_new_interned_string(zend_string_copy(new_compiled_filename));
ZVAL_STR(&rv, new_compiled_filename);
zend_hash_add_new(&CG(filenames_table), new_compiled_filename, &rv);
CG(compiled_filename) = new_compiled_filename;
return new_compiled_filename;
}
/* }}} */
ZEND_API void zend_restore_compiled_filename(zend_string *original_compiled_filename) /* {{{ */
{
CG(compiled_filename) = original_compiled_filename;
}
/* }}} */
ZEND_API zend_string *zend_get_compiled_filename(void) /* {{{ */
{
return CG(compiled_filename);
}
/* }}} */
ZEND_API int zend_get_compiled_lineno(void) /* {{{ */
{
return CG(zend_lineno);
}
/* }}} */
ZEND_API zend_bool zend_is_compiling(void) /* {{{ */
{
return CG(in_compilation);
}
/* }}} */
static zend_always_inline uint32_t get_temporary_variable(void) /* {{{ */
{
return (uint32_t)CG(active_op_array)->T++;
}
/* }}} */
static int lookup_cv(zend_string *name) /* {{{ */{
zend_op_array *op_array = CG(active_op_array);
int i = 0;
zend_ulong hash_value = zend_string_hash_val(name);
while (i < op_array->last_var) {
if (ZSTR_H(op_array->vars[i]) == hash_value
&& zend_string_equals(op_array->vars[i], name)) {
return (int)(zend_intptr_t)ZEND_CALL_VAR_NUM(NULL, i);
}
i++;
}
i = op_array->last_var;
op_array->last_var++;
if (op_array->last_var > CG(context).vars_size) {
CG(context).vars_size += 16; /* FIXME */
op_array->vars = erealloc(op_array->vars, CG(context).vars_size * sizeof(zend_string*));
}
op_array->vars[i] = zend_string_copy(name);
return (int)(zend_intptr_t)ZEND_CALL_VAR_NUM(NULL, i);
}
/* }}} */
static inline zend_string *zval_make_interned_string(zval *zv) /* {{{ */
{
ZEND_ASSERT(Z_TYPE_P(zv) == IS_STRING);
Z_STR_P(zv) = zend_new_interned_string(Z_STR_P(zv));
if (ZSTR_IS_INTERNED(Z_STR_P(zv))) {
Z_TYPE_FLAGS_P(zv) = 0;
}
return Z_STR_P(zv);
}
/* Common part of zend_add_literal and zend_append_individual_literal */
static inline void zend_insert_literal(zend_op_array *op_array, zval *zv, int literal_position) /* {{{ */
{
zval *lit = CT_CONSTANT_EX(op_array, literal_position);
if (Z_TYPE_P(zv) == IS_STRING) {
zval_make_interned_string(zv);
}
ZVAL_COPY_VALUE(lit, zv);
Z_EXTRA_P(lit) = 0;
}
/* }}} */
/* Is used while compiling a function, using the context to keep track
of an approximate size to avoid to relocate to often.
Literals are truncated to actual size in the second compiler pass (pass_two()). */
static int zend_add_literal(zval *zv) /* {{{ */
{
zend_op_array *op_array = CG(active_op_array);
int i = op_array->last_literal;
op_array->last_literal++;
if (i >= CG(context).literals_size) {
while (i >= CG(context).literals_size) {
CG(context).literals_size += 16; /* FIXME */
}
op_array->literals = (zval*)erealloc(op_array->literals, CG(context).literals_size * sizeof(zval));
}
zend_insert_literal(op_array, zv, i);
return i;
}
/* }}} */
static inline int zend_add_literal_string(zend_string **str) /* {{{ */
{
int ret;
zval zv;
ZVAL_STR(&zv, *str);
ret = zend_add_literal(&zv);
*str = Z_STR(zv);
return ret;
}
/* }}} */
static int zend_add_func_name_literal(zend_string *name) /* {{{ */
{
/* Original name */
int ret = zend_add_literal_string(&name);
/* Lowercased name */
zend_string *lc_name = zend_string_tolower(name);
zend_add_literal_string(&lc_name);
return ret;
}
/* }}} */
static int zend_add_ns_func_name_literal(zend_string *name) /* {{{ */
{
const char *unqualified_name;
size_t unqualified_name_len;
/* Original name */
int ret = zend_add_literal_string(&name);
/* Lowercased name */
zend_string *lc_name = zend_string_tolower(name);
zend_add_literal_string(&lc_name);
/* Lowercased unqualfied name */
if (zend_get_unqualified_name(name, &unqualified_name, &unqualified_name_len)) {
lc_name = zend_string_alloc(unqualified_name_len, 0);
zend_str_tolower_copy(ZSTR_VAL(lc_name), unqualified_name, unqualified_name_len);
zend_add_literal_string(&lc_name);
}
return ret;
}
/* }}} */
static int zend_add_class_name_literal(zend_string *name) /* {{{ */
{
/* Original name */
int ret = zend_add_literal_string(&name);
/* Lowercased name */
zend_string *lc_name = zend_string_tolower(name);
zend_add_literal_string(&lc_name);
return ret;
}
/* }}} */
static int zend_add_const_name_literal(zend_string *name, zend_bool unqualified) /* {{{ */
{
zend_string *tmp_name;
int ret = zend_add_literal_string(&name);
size_t ns_len = 0, after_ns_len = ZSTR_LEN(name);
const char *after_ns = zend_memrchr(ZSTR_VAL(name), '\\', ZSTR_LEN(name));
if (after_ns) {
after_ns += 1;
ns_len = after_ns - ZSTR_VAL(name) - 1;
after_ns_len = ZSTR_LEN(name) - ns_len - 1;
/* lowercased namespace name & original constant name */
tmp_name = zend_string_init(ZSTR_VAL(name), ZSTR_LEN(name), 0);
zend_str_tolower(ZSTR_VAL(tmp_name), ns_len);
zend_add_literal_string(&tmp_name);
if (!unqualified) {
return ret;
}
} else {
after_ns = ZSTR_VAL(name);
}
/* original unqualified constant name */
tmp_name = zend_string_init(after_ns, after_ns_len, 0);
zend_add_literal_string(&tmp_name);
return ret;
}
/* }}} */
#define LITERAL_STR(op, str) do { \
zval _c; \
ZVAL_STR(&_c, str); \
op.constant = zend_add_literal(&_c); \
} while (0)
void zend_stop_lexing(void)
{
if (LANG_SCNG(on_event)) {
LANG_SCNG(on_event)(ON_STOP, END, 0, LANG_SCNG(on_event_context));
}
LANG_SCNG(yy_cursor) = LANG_SCNG(yy_limit);
}
static inline void zend_begin_loop(
zend_uchar free_opcode, const znode *loop_var, zend_bool is_switch) /* {{{ */
{
zend_brk_cont_element *brk_cont_element;
int parent = CG(context).current_brk_cont;
zend_loop_var info = {0};
CG(context).current_brk_cont = CG(context).last_brk_cont;
brk_cont_element = get_next_brk_cont_element();
brk_cont_element->parent = parent;
brk_cont_element->is_switch = is_switch;
if (loop_var && (loop_var->op_type & (IS_VAR|IS_TMP_VAR))) {
uint32_t start = get_next_op_number();
info.opcode = free_opcode;
info.var_type = loop_var->op_type;
info.var_num = loop_var->u.op.var;
brk_cont_element->start = start;
} else {
info.opcode = ZEND_NOP;
/* The start field is used to free temporary variables in case of exceptions.
* We won't try to free something of we don't have loop variable. */
brk_cont_element->start = -1;
}
zend_stack_push(&CG(loop_var_stack), &info);
}
/* }}} */
static inline void zend_end_loop(int cont_addr, const znode *var_node) /* {{{ */
{
uint32_t end = get_next_op_number();
zend_brk_cont_element *brk_cont_element
= &CG(context).brk_cont_array[CG(context).current_brk_cont];
brk_cont_element->cont = cont_addr;
brk_cont_element->brk = end;
CG(context).current_brk_cont = brk_cont_element->parent;
zend_stack_del_top(&CG(loop_var_stack));
}
/* }}} */
void zend_do_free(znode *op1) /* {{{ */
{
if (op1->op_type == IS_TMP_VAR) {
zend_op *opline = &CG(active_op_array)->opcodes[CG(active_op_array)->last-1];
while (opline->opcode == ZEND_END_SILENCE) {
opline--;
}
if (opline->result_type == IS_TMP_VAR && opline->result.var == op1->u.op.var) {
switch (opline->opcode) {
case ZEND_BOOL:
case ZEND_BOOL_NOT:
/* boolean resuls don't have to be freed */
return;
case ZEND_POST_INC_STATIC_PROP:
case ZEND_POST_DEC_STATIC_PROP:
case ZEND_POST_INC_OBJ:
case ZEND_POST_DEC_OBJ:
case ZEND_POST_INC:
case ZEND_POST_DEC:
/* convert $i++ to ++$i */
opline->opcode -= 2;
opline->result_type = IS_UNUSED;
return;
}
}
zend_emit_op(NULL, ZEND_FREE, op1, NULL);
} else if (op1->op_type == IS_VAR) {
zend_op *opline = &CG(active_op_array)->opcodes[CG(active_op_array)->last-1];
while (opline->opcode == ZEND_END_SILENCE ||
opline->opcode == ZEND_EXT_FCALL_END ||
opline->opcode == ZEND_OP_DATA) {
opline--;
}
if (opline->result_type == IS_VAR
&& opline->result.var == op1->u.op.var) {
if (opline->opcode == ZEND_FETCH_THIS) {
opline->opcode = ZEND_NOP;
opline->result_type = IS_UNUSED;
} else {
opline->result_type = IS_UNUSED;
}
} else {
while (opline >= CG(active_op_array)->opcodes) {
if ((opline->opcode == ZEND_FETCH_LIST_R ||
opline->opcode == ZEND_FETCH_LIST_W) &&
opline->op1_type == IS_VAR &&
opline->op1.var == op1->u.op.var) {
zend_emit_op(NULL, ZEND_FREE, op1, NULL);
return;
}
if (opline->result_type == IS_VAR
&& opline->result.var == op1->u.op.var) {
if (opline->opcode == ZEND_NEW) {
zend_emit_op(NULL, ZEND_FREE, op1, NULL);
}
break;
}
opline--;
}
}
} else if (op1->op_type == IS_CONST) {
/* Destroy value without using GC: When opcache moves arrays into SHM it will
* free the zend_array structure, so references to it from outside the op array
* become invalid. GC would cause such a reference in the root buffer. */
zval_ptr_dtor_nogc(&op1->u.constant);
}
}
/* }}} */
uint32_t zend_add_class_modifier(uint32_t flags, uint32_t new_flag) /* {{{ */
{
uint32_t new_flags = flags | new_flag;
if ((flags & ZEND_ACC_EXPLICIT_ABSTRACT_CLASS) && (new_flag & ZEND_ACC_EXPLICIT_ABSTRACT_CLASS)) {
zend_throw_exception(zend_ce_compile_error,
"Multiple abstract modifiers are not allowed", 0);
return 0;
}
if ((flags & ZEND_ACC_FINAL) && (new_flag & ZEND_ACC_FINAL)) {
zend_throw_exception(zend_ce_compile_error, "Multiple final modifiers are not allowed", 0);
return 0;
}
if ((new_flags & ZEND_ACC_EXPLICIT_ABSTRACT_CLASS) && (new_flags & ZEND_ACC_FINAL)) {
zend_throw_exception(zend_ce_compile_error,
"Cannot use the final modifier on an abstract class", 0);
return 0;
}
return new_flags;
}
/* }}} */
uint32_t zend_add_member_modifier(uint32_t flags, uint32_t new_flag) /* {{{ */
{
uint32_t new_flags = flags | new_flag;
if ((flags & ZEND_ACC_PPP_MASK) && (new_flag & ZEND_ACC_PPP_MASK)) {
zend_throw_exception(zend_ce_compile_error,
"Multiple access type modifiers are not allowed", 0);
return 0;
}
if ((flags & ZEND_ACC_ABSTRACT) && (new_flag & ZEND_ACC_ABSTRACT)) {
zend_throw_exception(zend_ce_compile_error, "Multiple abstract modifiers are not allowed", 0);
return 0;
}
if ((flags & ZEND_ACC_STATIC) && (new_flag & ZEND_ACC_STATIC)) {
zend_throw_exception(zend_ce_compile_error, "Multiple static modifiers are not allowed", 0);
return 0;
}
if ((flags & ZEND_ACC_FINAL) && (new_flag & ZEND_ACC_FINAL)) {
zend_throw_exception(zend_ce_compile_error, "Multiple final modifiers are not allowed", 0);
return 0;
}
if ((new_flags & ZEND_ACC_ABSTRACT) && (new_flags & ZEND_ACC_FINAL)) {
zend_throw_exception(zend_ce_compile_error,
"Cannot use the final modifier on an abstract class member", 0);
return 0;
}
return new_flags;
}
/* }}} */
zend_string *zend_concat3(char *str1, size_t str1_len, char *str2, size_t str2_len, char *str3, size_t str3_len) /* {{{ */
{
size_t len = str1_len + str2_len + str3_len;
zend_string *res = zend_string_alloc(len, 0);
memcpy(ZSTR_VAL(res), str1, str1_len);
memcpy(ZSTR_VAL(res) + str1_len, str2, str2_len);
memcpy(ZSTR_VAL(res) + str1_len + str2_len, str3, str3_len);
ZSTR_VAL(res)[len] = '\0';
return res;
}
zend_string *zend_concat_names(char *name1, size_t name1_len, char *name2, size_t name2_len) {
return zend_concat3(name1, name1_len, "\\", 1, name2, name2_len);
}
zend_string *zend_prefix_with_ns(zend_string *name) {
if (FC(current_namespace)) {
zend_string *ns = FC(current_namespace);
return zend_concat_names(ZSTR_VAL(ns), ZSTR_LEN(ns), ZSTR_VAL(name), ZSTR_LEN(name));
} else {
return zend_string_copy(name);
}
}
zend_string *zend_resolve_non_class_name(
zend_string *name, uint32_t type, zend_bool *is_fully_qualified,
zend_bool case_sensitive, HashTable *current_import_sub
) {
char *compound;
*is_fully_qualified = 0;
if (ZSTR_VAL(name)[0] == '\\') {
/* Remove \ prefix (only relevant if this is a string rather than a label) */
*is_fully_qualified = 1;
return zend_string_init(ZSTR_VAL(name) + 1, ZSTR_LEN(name) - 1, 0);
}
if (type == ZEND_NAME_FQ) {
*is_fully_qualified = 1;
return zend_string_copy(name);
}
if (type == ZEND_NAME_RELATIVE) {
*is_fully_qualified = 1;
return zend_prefix_with_ns(name);
}
if (current_import_sub) {
/* If an unqualified name is a function/const alias, replace it. */
zend_string *import_name;
if (case_sensitive) {
import_name = zend_hash_find_ptr(current_import_sub, name);
} else {
import_name = zend_hash_find_ptr_lc(current_import_sub, ZSTR_VAL(name), ZSTR_LEN(name));
}
if (import_name) {
*is_fully_qualified = 1;
return zend_string_copy(import_name);
}
}
compound = memchr(ZSTR_VAL(name), '\\', ZSTR_LEN(name));
if (compound) {
*is_fully_qualified = 1;
}
if (compound && FC(imports)) {
/* If the first part of a qualified name is an alias, substitute it. */
size_t len = compound - ZSTR_VAL(name);
zend_string *import_name = zend_hash_find_ptr_lc(FC(imports), ZSTR_VAL(name), len);
if (import_name) {
return zend_concat_names(
ZSTR_VAL(import_name), ZSTR_LEN(import_name), ZSTR_VAL(name) + len + 1, ZSTR_LEN(name) - len - 1);
}
}
return zend_prefix_with_ns(name);
}
/* }}} */
zend_string *zend_resolve_function_name(zend_string *name, uint32_t type, zend_bool *is_fully_qualified) /* {{{ */
{
return zend_resolve_non_class_name(
name, type, is_fully_qualified, 0, FC(imports_function));
}
/* }}} */
zend_string *zend_resolve_const_name(zend_string *name, uint32_t type, zend_bool *is_fully_qualified) /* {{{ */ {
return zend_resolve_non_class_name(
name, type, is_fully_qualified, 1, FC(imports_const));
}
/* }}} */
zend_string *zend_resolve_class_name(zend_string *name, uint32_t type) /* {{{ */
{
char *compound;
if (type == ZEND_NAME_RELATIVE) {
return zend_prefix_with_ns(name);
}
if (type == ZEND_NAME_FQ || ZSTR_VAL(name)[0] == '\\') {
/* Remove \ prefix (only relevant if this is a string rather than a label) */
if (ZSTR_VAL(name)[0] == '\\') {
name = zend_string_init(ZSTR_VAL(name) + 1, ZSTR_LEN(name) - 1, 0);
} else {
zend_string_addref(name);
}
/* Ensure that \self, \parent and \static are not used */
if (ZEND_FETCH_CLASS_DEFAULT != zend_get_class_fetch_type(name)) {
zend_error_noreturn(E_COMPILE_ERROR, "'\\%s' is an invalid class name", ZSTR_VAL(name));
}
return name;
}
if (FC(imports)) {
compound = memchr(ZSTR_VAL(name), '\\', ZSTR_LEN(name));
if (compound) {
/* If the first part of a qualified name is an alias, substitute it. */
size_t len = compound - ZSTR_VAL(name);
zend_string *import_name =
zend_hash_find_ptr_lc(FC(imports), ZSTR_VAL(name), len);
if (import_name) {
return zend_concat_names(
ZSTR_VAL(import_name), ZSTR_LEN(import_name), ZSTR_VAL(name) + len + 1, ZSTR_LEN(name) - len - 1);
}
} else {
/* If an unqualified name is an alias, replace it. */
zend_string *import_name
= zend_hash_find_ptr_lc(FC(imports), ZSTR_VAL(name), ZSTR_LEN(name));
if (import_name) {
return zend_string_copy(import_name);
}
}
}
/* If not fully qualified and not an alias, prepend the current namespace */
return zend_prefix_with_ns(name);
}
/* }}} */
zend_string *zend_resolve_class_name_ast(zend_ast *ast) /* {{{ */
{
zval *class_name = zend_ast_get_zval(ast);
if (Z_TYPE_P(class_name) != IS_STRING) {
zend_error_noreturn(E_COMPILE_ERROR, "Illegal class name");
}
return zend_resolve_class_name(Z_STR_P(class_name), ast->attr);
}
/* }}} */
static void label_ptr_dtor(zval *zv) /* {{{ */
{
efree_size(Z_PTR_P(zv), sizeof(zend_label));
}
/* }}} */
static void str_dtor(zval *zv) /* {{{ */ {
zend_string_release_ex(Z_STR_P(zv), 0);
}
/* }}} */
static zend_bool zend_is_call(zend_ast *ast);
static uint32_t zend_add_try_element(uint32_t try_op) /* {{{ */
{
zend_op_array *op_array = CG(active_op_array);
uint32_t try_catch_offset = op_array->last_try_catch++;
zend_try_catch_element *elem;
op_array->try_catch_array = safe_erealloc(
op_array->try_catch_array, sizeof(zend_try_catch_element), op_array->last_try_catch, 0);
elem = &op_array->try_catch_array[try_catch_offset];
elem->try_op = try_op;
elem->catch_op = 0;
elem->finally_op = 0;
elem->finally_end = 0;
return try_catch_offset;
}
/* }}} */
ZEND_API void function_add_ref(zend_function *function) /* {{{ */
{
if (function->type == ZEND_USER_FUNCTION) {
zend_op_array *op_array = &function->op_array;
if (op_array->refcount) {
(*op_array->refcount)++;
}
if (op_array->static_variables
&& !(GC_FLAGS(op_array->static_variables) & IS_ARRAY_IMMUTABLE)) {
GC_ADDREF(op_array->static_variables);
}
if (CG(compiler_options) & ZEND_COMPILE_PRELOAD) {
ZEND_ASSERT(op_array->fn_flags & ZEND_ACC_PRELOADED);
ZEND_MAP_PTR_NEW(op_array->run_time_cache);
ZEND_MAP_PTR_NEW(op_array->static_variables_ptr);
} else {
ZEND_MAP_PTR_INIT(op_array->static_variables_ptr, &op_array->static_variables);
ZEND_MAP_PTR_INIT(op_array->run_time_cache, zend_arena_alloc(&CG(arena), sizeof(void*)));
ZEND_MAP_PTR_SET(op_array->run_time_cache, NULL);
}
} else if (function->type == ZEND_INTERNAL_FUNCTION) {
if (function->common.function_name) {
zend_string_addref(function->common.function_name);
}
}
}
/* }}} */
static zend_never_inline ZEND_COLD ZEND_NORETURN void do_bind_function_error(zend_string *lcname, zend_op_array *op_array, zend_bool compile_time) /* {{{ */
{
zval *zv = zend_hash_find_ex(compile_time ? CG(function_table) : EG(function_table), lcname, 1);
int error_level = compile_time ? E_COMPILE_ERROR : E_ERROR;
zend_function *old_function;
ZEND_ASSERT(zv != NULL);
old_function = (zend_function*)Z_PTR_P(zv);
if (old_function->type == ZEND_USER_FUNCTION
&& old_function->op_array.last > 0) {
zend_error_noreturn(error_level, "Cannot redeclare %s() (previously declared in %s:%d)",
op_array ? ZSTR_VAL(op_array->function_name) : ZSTR_VAL(old_function->common.function_name),
ZSTR_VAL(old_function->op_array.filename),
old_function->op_array.opcodes[0].lineno);
} else {
zend_error_noreturn(error_level, "Cannot redeclare %s()",
op_array ? ZSTR_VAL(op_array->function_name) : ZSTR_VAL(old_function->common.function_name));
}
}
ZEND_API int do_bind_function(zval *lcname) /* {{{ */
{
zend_function *function;
zval *rtd_key, *zv;
rtd_key = lcname + 1;
zv = zend_hash_find_ex(EG(function_table), Z_STR_P(rtd_key), 1);
if (UNEXPECTED(!zv)) {
do_bind_function_error(Z_STR_P(lcname), NULL, 0);
return FAILURE;
}
function = (zend_function*)Z_PTR_P(zv);
zv = zend_hash_set_bucket_key(EG(function_table), (Bucket*)zv, Z_STR_P(lcname));
if (UNEXPECTED(!zv)) {
do_bind_function_error(Z_STR_P(lcname), &function->op_array, 0);
return FAILURE;
}
return SUCCESS;
}
/* }}} */
ZEND_API int do_bind_class(zval *lcname, zend_string *lc_parent_name) /* {{{ */
{
zend_class_entry *ce;
zval *rtd_key, *zv;
rtd_key = lcname + 1;
zv = zend_hash_find_ex(EG(class_table), Z_STR_P(rtd_key), 1);
if (UNEXPECTED(!zv)) {
ce = zend_hash_find_ptr(EG(class_table), Z_STR_P(lcname));
if (ce) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot declare %s %s, because the name is already in use", zend_get_object_type(ce), ZSTR_VAL(ce->name));
} else {
ZEND_ASSERT(EG(current_execute_data)->func->op_array.fn_flags & ZEND_ACC_PRELOADED);
zend_error_noreturn(E_ERROR, "Class %s wasn't preloaded", Z_STRVAL_P(lcname));
}
return FAILURE;
}
/* Register the derived class */
ce = (zend_class_entry*)Z_PTR_P(zv);
zv = zend_hash_set_bucket_key(EG(class_table), (Bucket*)zv, Z_STR_P(lcname));
if (UNEXPECTED(!zv)) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot declare %s %s, because the name is already in use", zend_get_object_type(ce), ZSTR_VAL(ce->name));
return FAILURE;
}
if (zend_do_link_class(ce, lc_parent_name) == FAILURE) {
/* Reload bucket pointer, the hash table may have been reallocated */
zv = zend_hash_find(EG(class_table), Z_STR_P(lcname));
zend_hash_set_bucket_key(EG(class_table), (Bucket *) zv, Z_STR_P(rtd_key));
return FAILURE;
}
return SUCCESS;
}
/* }}} */
static zend_string *add_type_string(zend_string *type, zend_string *new_type) {
zend_string *result;
if (type == NULL) {
return zend_string_copy(new_type);
}
// TODO: Switch to smart_str?
result = zend_string_alloc(ZSTR_LEN(type) + ZSTR_LEN(new_type) + 1, 0);
memcpy(ZSTR_VAL(result), ZSTR_VAL(type), ZSTR_LEN(type));
ZSTR_VAL(result)[ZSTR_LEN(type)] = '|';
memcpy(ZSTR_VAL(result) + ZSTR_LEN(type) + 1, ZSTR_VAL(new_type), ZSTR_LEN(new_type));
ZSTR_VAL(result)[ZSTR_LEN(type) + ZSTR_LEN(new_type) + 1] = '\0';
zend_string_release(type);
return result;
}
static zend_string *resolve_class_name(zend_string *name, zend_class_entry *scope) {
if (scope) {
if (zend_string_equals_literal_ci(name, "self")) {
name = scope->name;
} else if (zend_string_equals_literal_ci(name, "parent") && scope->parent) {
name = scope->parent->name;
}
}
return name;
}
zend_string *zend_type_to_string_resolved(zend_type type, zend_class_entry *scope) {
zend_string *str = NULL;
if (ZEND_TYPE_HAS_LIST(type)) {
zend_type *list_type;
ZEND_TYPE_LIST_FOREACH(ZEND_TYPE_LIST(type), list_type) {
if (ZEND_TYPE_HAS_CE(*list_type)) {
str = add_type_string(str, ZEND_TYPE_CE(*list_type)->name);
} else {
str = add_type_string(str, resolve_class_name(ZEND_TYPE_NAME(*list_type), scope));
}
} ZEND_TYPE_LIST_FOREACH_END();
} else if (ZEND_TYPE_HAS_NAME(type)) {
str = zend_string_copy(resolve_class_name(ZEND_TYPE_NAME(type), scope));
} else if (ZEND_TYPE_HAS_CE(type)) {
str = zend_string_copy(ZEND_TYPE_CE(type)->name);
}
uint32_t type_mask = ZEND_TYPE_FULL_MASK(type);
if (type_mask & MAY_BE_CALLABLE) {
str = add_type_string(str, ZSTR_KNOWN(ZEND_STR_CALLABLE));
}
if (type_mask & MAY_BE_ITERABLE) {
str = add_type_string(str, ZSTR_KNOWN(ZEND_STR_ITERABLE));
}
if (type_mask & MAY_BE_OBJECT) {
str = add_type_string(str, ZSTR_KNOWN(ZEND_STR_OBJECT));
}
if (type_mask & MAY_BE_ARRAY) {
str = add_type_string(str, ZSTR_KNOWN(ZEND_STR_ARRAY));
}
if (type_mask & MAY_BE_STRING) {
str = add_type_string(str, ZSTR_KNOWN(ZEND_STR_STRING));
}
if (type_mask & MAY_BE_LONG) {
str = add_type_string(str, ZSTR_KNOWN(ZEND_STR_INT));
}
if (type_mask & MAY_BE_DOUBLE) {
str = add_type_string(str, ZSTR_KNOWN(ZEND_STR_FLOAT));
}
if ((type_mask & MAY_BE_BOOL) == MAY_BE_BOOL) {
str = add_type_string(str, ZSTR_KNOWN(ZEND_STR_BOOL));
} else if (type_mask & MAY_BE_FALSE) {
str = add_type_string(str, ZSTR_KNOWN(ZEND_STR_FALSE));
}
if (type_mask & MAY_BE_VOID) {
str = add_type_string(str, ZSTR_KNOWN(ZEND_STR_VOID));
}
if (type_mask & MAY_BE_NULL) {
zend_bool is_union = !str || memchr(ZSTR_VAL(str), '|', ZSTR_LEN(str)) != NULL;
if (!is_union) {
zend_string *nullable_str = zend_string_alloc(ZSTR_LEN(str) + 1, 0);
ZSTR_VAL(nullable_str)[0] = '?';
memcpy(ZSTR_VAL(nullable_str) + 1, ZSTR_VAL(str), ZSTR_LEN(str));
ZSTR_VAL(nullable_str)[ZSTR_LEN(nullable_str)] = '\0';
zend_string_release(str);
return nullable_str;
}
str = add_type_string(str, ZSTR_KNOWN(ZEND_STR_NULL_LOWERCASE));
}
return str;
}
zend_string *zend_type_to_string(zend_type type) {
return zend_type_to_string_resolved(type, NULL);
}
static zend_bool is_generator_compatible_class_type(zend_string *name) {
return zend_string_equals_literal_ci(name, "Traversable")
|| zend_string_equals_literal_ci(name, "Iterator")
|| zend_string_equals_literal_ci(name, "Generator");
}
static void zend_mark_function_as_generator() /* {{{ */
{
if (!CG(active_op_array)->function_name) {
zend_error_noreturn(E_COMPILE_ERROR,
"The \"yield\" expression can only be used inside a function");
}
if (CG(active_op_array)->fn_flags & ZEND_ACC_HAS_RETURN_TYPE) {
zend_type return_type = CG(active_op_array)->arg_info[-1].type;
zend_bool valid_type = (ZEND_TYPE_FULL_MASK(return_type) & MAY_BE_ITERABLE) != 0;
if (!valid_type) {
zend_type *single_type;
ZEND_TYPE_FOREACH(return_type, single_type) {
if (ZEND_TYPE_HAS_NAME(*single_type)
&& is_generator_compatible_class_type(ZEND_TYPE_NAME(*single_type))) {
valid_type = 1;
break;
}
} ZEND_TYPE_FOREACH_END();
}
if (!valid_type) {
zend_string *str = zend_type_to_string(return_type);
zend_error_noreturn(E_COMPILE_ERROR,
"Generators may only declare a return type containing " \
"Generator, Iterator, Traversable, or iterable, %s is not permitted",
ZSTR_VAL(str));
}
}
CG(active_op_array)->fn_flags |= ZEND_ACC_GENERATOR;
}
/* }}} */
ZEND_API uint32_t zend_build_delayed_early_binding_list(const zend_op_array *op_array) /* {{{ */
{
if (op_array->fn_flags & ZEND_ACC_EARLY_BINDING) {
uint32_t first_early_binding_opline = (uint32_t)-1;
uint32_t *prev_opline_num = &first_early_binding_opline;
zend_op *opline = op_array->opcodes;
zend_op *end = opline + op_array->last;
while (opline < end) {
if (opline->opcode == ZEND_DECLARE_CLASS_DELAYED) {
*prev_opline_num = opline - op_array->opcodes;
prev_opline_num = &opline->result.opline_num;
}
++opline;
}
*prev_opline_num = -1;
return first_early_binding_opline;
}
return (uint32_t)-1;
}
/* }}} */
ZEND_API void zend_do_delayed_early_binding(zend_op_array *op_array, uint32_t first_early_binding_opline) /* {{{ */
{
if (first_early_binding_opline != (uint32_t)-1) {
zend_bool orig_in_compilation = CG(in_compilation);
uint32_t opline_num = first_early_binding_opline;
void **run_time_cache;
if (!ZEND_MAP_PTR(op_array->run_time_cache)) {
void *ptr;
ZEND_ASSERT(op_array->fn_flags & ZEND_ACC_HEAP_RT_CACHE);
ptr = emalloc(op_array->cache_size + sizeof(void*));
ZEND_MAP_PTR_INIT(op_array->run_time_cache, ptr);
ptr = (char*)ptr + sizeof(void*);
ZEND_MAP_PTR_SET(op_array->run_time_cache, ptr);
memset(ptr, 0, op_array->cache_size);
}
run_time_cache = RUN_TIME_CACHE(op_array);
CG(in_compilation) = 1;
while (opline_num != (uint32_t)-1) {
const zend_op *opline = &op_array->opcodes[opline_num];
zval *lcname = RT_CONSTANT(opline, opline->op1);
zval *zv = zend_hash_find_ex(EG(class_table), Z_STR_P(lcname + 1), 1);
if (zv) {
zend_class_entry *ce = Z_CE_P(zv);
zend_string *lc_parent_name = Z_STR_P(RT_CONSTANT(opline, opline->op2));
zend_class_entry *parent_ce = zend_hash_find_ex_ptr(EG(class_table), lc_parent_name, 1);
if (parent_ce) {
if (zend_try_early_bind(ce, parent_ce, Z_STR_P(lcname), zv)) {
/* Store in run-time cache */
((void**)((char*)run_time_cache + opline->extended_value))[0] = ce;
}
}
}
opline_num = op_array->opcodes[opline_num].result.opline_num;
}
CG(in_compilation) = orig_in_compilation;
}
}
/* }}} */
ZEND_API zend_string *zend_mangle_property_name(const char *src1, size_t src1_length, const char *src2, size_t src2_length, int internal) /* {{{ */
{
size_t prop_name_length = 1 + src1_length + 1 + src2_length;
zend_string *prop_name = zend_string_alloc(prop_name_length, internal);
ZSTR_VAL(prop_name)[0] = '\0';
memcpy(ZSTR_VAL(prop_name) + 1, src1, src1_length+1);
memcpy(ZSTR_VAL(prop_name) + 1 + src1_length + 1, src2, src2_length+1);
return prop_name;
}
/* }}} */
static zend_always_inline size_t zend_strnlen(const char* s, size_t maxlen) /* {{{ */
{
size_t len = 0;
while (*s++ && maxlen--) len++;
return len;
}
/* }}} */
ZEND_API int zend_unmangle_property_name_ex(const zend_string *name, const char **class_name, const char **prop_name, size_t *prop_len) /* {{{ */
{
size_t class_name_len;
size_t anonclass_src_len;
*class_name = NULL;
if (!ZSTR_LEN(name) || ZSTR_VAL(name)[0] != '\0') {
*prop_name = ZSTR_VAL(name);
if (prop_len) {
*prop_len = ZSTR_LEN(name);
}
return SUCCESS;
}
if (ZSTR_LEN(name) < 3 || ZSTR_VAL(name)[1] == '\0') {
zend_error(E_NOTICE, "Illegal member variable name");
*prop_name = ZSTR_VAL(name);
if (prop_len) {
*prop_len = ZSTR_LEN(name);
}
return FAILURE;
}
class_name_len = zend_strnlen(ZSTR_VAL(name) + 1, ZSTR_LEN(name) - 2);
if (class_name_len >= ZSTR_LEN(name) - 2 || ZSTR_VAL(name)[class_name_len + 1] != '\0') {
zend_error(E_NOTICE, "Corrupt member variable name");
*prop_name = ZSTR_VAL(name);
if (prop_len) {
*prop_len = ZSTR_LEN(name);
}
return FAILURE;
}
*class_name = ZSTR_VAL(name) + 1;
anonclass_src_len = zend_strnlen(*class_name + class_name_len + 1, ZSTR_LEN(name) - class_name_len - 2);
if (class_name_len + anonclass_src_len + 2 != ZSTR_LEN(name)) {
class_name_len += anonclass_src_len + 1;
}
*prop_name = ZSTR_VAL(name) + class_name_len + 2;
if (prop_len) {
*prop_len = ZSTR_LEN(name) - class_name_len - 2;
}
return SUCCESS;
}
/* }}} */
static zend_bool can_ct_eval_const(zend_constant *c) {
if (ZEND_CONSTANT_FLAGS(c) & CONST_DEPRECATED) {
return 0;
}
if ((ZEND_CONSTANT_FLAGS(c) & CONST_PERSISTENT)
&& !(CG(compiler_options) & ZEND_COMPILE_NO_PERSISTENT_CONSTANT_SUBSTITUTION)
&& !((ZEND_CONSTANT_FLAGS(c) & CONST_NO_FILE_CACHE)
&& (CG(compiler_options) & ZEND_COMPILE_WITH_FILE_CACHE))) {
return 1;
}
if (Z_TYPE(c->value) < IS_OBJECT
&& !(CG(compiler_options) & ZEND_COMPILE_NO_CONSTANT_SUBSTITUTION)) {
return 1;
}
return 0;
}
static zend_bool zend_try_ct_eval_const(zval *zv, zend_string *name, zend_bool is_fully_qualified) /* {{{ */
{
zend_constant *c = zend_hash_find_ptr(EG(zend_constants), name);
if (c && can_ct_eval_const(c)) {
ZVAL_COPY_OR_DUP(zv, &c->value);
return 1;
}
{
/* Substitute true, false and null (including unqualified usage in namespaces) */
const char *lookup_name = ZSTR_VAL(name);
size_t lookup_len = ZSTR_LEN(name);
if (!is_fully_qualified) {
zend_get_unqualified_name(name, &lookup_name, &lookup_len);
}
if ((c = zend_get_special_const(lookup_name, lookup_len))) {
ZVAL_COPY_VALUE(zv, &c->value);
return 1;
}
return 0;
}
}
/* }}} */
static inline zend_bool zend_is_scope_known() /* {{{ */
{
if (CG(active_op_array)->fn_flags & ZEND_ACC_CLOSURE) {
/* Closures can be rebound to a different scope */
return 0;
}
if (!CG(active_class_entry)) {
/* The scope is known if we're in a free function (no scope), but not if we're in
* a file/eval (which inherits including/eval'ing scope). */
return CG(active_op_array)->function_name != NULL;
}
/* For traits self etc refers to the using class, not the trait itself */
return (CG(active_class_entry)->ce_flags & ZEND_ACC_TRAIT) == 0;
}
/* }}} */
static inline zend_bool class_name_refers_to_active_ce(zend_string *class_name, uint32_t fetch_type) /* {{{ */
{
if (!CG(active_class_entry)) {
return 0;
}
if (fetch_type == ZEND_FETCH_CLASS_SELF && zend_is_scope_known()) {
return 1;
}
return fetch_type == ZEND_FETCH_CLASS_DEFAULT
&& zend_string_equals_ci(class_name, CG(active_class_entry)->name);
}
/* }}} */
uint32_t zend_get_class_fetch_type(zend_string *name) /* {{{ */
{
if (zend_string_equals_literal_ci(name, "self")) {
return ZEND_FETCH_CLASS_SELF;
} else if (zend_string_equals_literal_ci(name, "parent")) {
return ZEND_FETCH_CLASS_PARENT;
} else if (zend_string_equals_literal_ci(name, "static")) {
return ZEND_FETCH_CLASS_STATIC;
} else {
return ZEND_FETCH_CLASS_DEFAULT;
}
}
/* }}} */
static uint32_t zend_get_class_fetch_type_ast(zend_ast *name_ast) /* {{{ */
{
/* Fully qualified names are always default refs */
if (name_ast->attr == ZEND_NAME_FQ) {
return ZEND_FETCH_CLASS_DEFAULT;
}
return zend_get_class_fetch_type(zend_ast_get_str(name_ast));
}
/* }}} */
static zend_string *zend_resolve_const_class_name_reference(zend_ast *ast, const char *type)
{
zend_string *class_name = zend_ast_get_str(ast);
if (ZEND_FETCH_CLASS_DEFAULT != zend_get_class_fetch_type_ast(ast)) {
zend_error_noreturn(E_COMPILE_ERROR,
"Cannot use '%s' as %s, as it is reserved",
ZSTR_VAL(class_name), type);
}
return zend_resolve_class_name(class_name, ast->attr);
}
static void zend_ensure_valid_class_fetch_type(uint32_t fetch_type) /* {{{ */
{
if (fetch_type != ZEND_FETCH_CLASS_DEFAULT && zend_is_scope_known()) {
zend_class_entry *ce = CG(active_class_entry);
if (!ce) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot use \"%s\" when no class scope is active",
fetch_type == ZEND_FETCH_CLASS_SELF ? "self" :
fetch_type == ZEND_FETCH_CLASS_PARENT ? "parent" : "static");
} else if (fetch_type == ZEND_FETCH_CLASS_PARENT && !ce->parent_name) {
zend_error_noreturn(E_COMPILE_ERROR,
"Cannot use \"parent\" when current class scope has no parent");
}
}
}
/* }}} */
static zend_bool zend_try_compile_const_expr_resolve_class_name(zval *zv, zend_ast *class_ast) /* {{{ */
{
uint32_t fetch_type;
zval *class_name;
if (class_ast->kind != ZEND_AST_ZVAL) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot use ::class with dynamic class name");
}
class_name = zend_ast_get_zval(class_ast);
if (Z_TYPE_P(class_name) != IS_STRING) {
zend_error_noreturn(E_COMPILE_ERROR, "Illegal class name");
}
fetch_type = zend_get_class_fetch_type(Z_STR_P(class_name));
zend_ensure_valid_class_fetch_type(fetch_type);
switch (fetch_type) {
case ZEND_FETCH_CLASS_SELF:
if (CG(active_class_entry) && zend_is_scope_known()) {
ZVAL_STR_COPY(zv, CG(active_class_entry)->name);
return 1;
}
return 0;
case ZEND_FETCH_CLASS_PARENT:
if (CG(active_class_entry) && CG(active_class_entry)->parent_name
&& zend_is_scope_known()) {
ZVAL_STR_COPY(zv, CG(active_class_entry)->parent_name);
return 1;
}
return 0;
case ZEND_FETCH_CLASS_STATIC:
return 0;
case ZEND_FETCH_CLASS_DEFAULT:
ZVAL_STR(zv, zend_resolve_class_name_ast(class_ast));
return 1;
EMPTY_SWITCH_DEFAULT_CASE()
}
}
/* }}} */
/* We don't use zend_verify_const_access because we need to deal with unlinked classes. */
static zend_bool zend_verify_ct_const_access(zend_class_constant *c, zend_class_entry *scope)
{
if (Z_ACCESS_FLAGS(c->value) & ZEND_ACC_PUBLIC) {
return 1;
} else if (Z_ACCESS_FLAGS(c->value) & ZEND_ACC_PRIVATE) {
return c->ce == scope;
} else {
zend_class_entry *ce = c->ce;
while (1) {
if (ce == scope) {
return 1;
}
if (!ce->parent) {
break;
}
if (ce->ce_flags & ZEND_ACC_RESOLVED_PARENT) {
ce = ce->parent;
} else {
ce = zend_hash_find_ptr_lc(CG(class_table), ZSTR_VAL(ce->parent_name), ZSTR_LEN(ce->parent_name));
if (!ce) {
break;
}
}
}
/* Reverse case cannot be true during compilation */
return 0;
}
}
static zend_bool zend_try_ct_eval_class_const(zval *zv, zend_string *class_name, zend_string *name) /* {{{ */
{
uint32_t fetch_type = zend_get_class_fetch_type(class_name);
zend_class_constant *cc;
zval *c;
if (class_name_refers_to_active_ce(class_name, fetch_type)) {
cc = zend_hash_find_ptr(&CG(active_class_entry)->constants_table, name);
} else if (fetch_type == ZEND_FETCH_CLASS_DEFAULT && !(CG(compiler_options) & ZEND_COMPILE_NO_CONSTANT_SUBSTITUTION)) {
zend_class_entry *ce = zend_hash_find_ptr_lc(CG(class_table), ZSTR_VAL(class_name), ZSTR_LEN(class_name));
if (ce) {
cc = zend_hash_find_ptr(&ce->constants_table, name);
} else {
return 0;
}
} else {
return 0;
}
if (CG(compiler_options) & ZEND_COMPILE_NO_PERSISTENT_CONSTANT_SUBSTITUTION) {
return 0;
}
if (!cc || !zend_verify_ct_const_access(cc, CG(active_class_entry))) {
return 0;
}
c = &cc->value;
/* Substitute case-sensitive (or lowercase) persistent class constants */
if (Z_TYPE_P(c) < IS_OBJECT) {
ZVAL_COPY_OR_DUP(zv, c);
return 1;
}
return 0;
}
/* }}} */
static void zend_add_to_list(void *result, void *item) /* {{{ */
{
void** list = *(void**)result;
size_t n = 0;
if (list) {
while (list[n]) {
n++;
}
}
list = erealloc(list, sizeof(void*) * (n+2));
list[n] = item;
list[n+1] = NULL;
*(void**)result = list;
}
/* }}} */
void zend_do_extended_stmt(void) /* {{{ */
{
zend_op *opline;
if (!(CG(compiler_options) & ZEND_COMPILE_EXTENDED_STMT)) {
return;
}
opline = get_next_op();
opline->opcode = ZEND_EXT_STMT;
}
/* }}} */
void zend_do_extended_fcall_begin(void) /* {{{ */
{
zend_op *opline;
if (!(CG(compiler_options) & ZEND_COMPILE_EXTENDED_FCALL)) {
return;
}
opline = get_next_op();
opline->opcode = ZEND_EXT_FCALL_BEGIN;
}
/* }}} */
void zend_do_extended_fcall_end(void) /* {{{ */
{
zend_op *opline;
if (!(CG(compiler_options) & ZEND_COMPILE_EXTENDED_FCALL)) {
return;
}
opline = get_next_op();
opline->opcode = ZEND_EXT_FCALL_END;
}
/* }}} */
zend_bool zend_is_auto_global_str(char *name, size_t len) /* {{{ */ {
zend_auto_global *auto_global;
if ((auto_global = zend_hash_str_find_ptr(CG(auto_globals), name, len)) != NULL) {
if (auto_global->armed) {
auto_global->armed = auto_global->auto_global_callback(auto_global->name);
}
return 1;
}
return 0;
}
/* }}} */
zend_bool zend_is_auto_global(zend_string *name) /* {{{ */
{
zend_auto_global *auto_global;
if ((auto_global = zend_hash_find_ptr(CG(auto_globals), name)) != NULL) {
if (auto_global->armed) {
auto_global->armed = auto_global->auto_global_callback(auto_global->name);
}
return 1;
}
return 0;
}
/* }}} */
int zend_register_auto_global(zend_string *name, zend_bool jit, zend_auto_global_callback auto_global_callback) /* {{{ */
{
zend_auto_global auto_global;
int retval;
auto_global.name = name;
auto_global.auto_global_callback = auto_global_callback;
auto_global.jit = jit;
retval = zend_hash_add_mem(CG(auto_globals), auto_global.name, &auto_global, sizeof(zend_auto_global)) != NULL ? SUCCESS : FAILURE;
return retval;
}
/* }}} */
ZEND_API void zend_activate_auto_globals(void) /* {{{ */
{
zend_auto_global *auto_global;
ZEND_HASH_FOREACH_PTR(CG(auto_globals), auto_global) {
if (auto_global->jit) {
auto_global->armed = 1;
} else if (auto_global->auto_global_callback) {
auto_global->armed = auto_global->auto_global_callback(auto_global->name);
} else {
auto_global->armed = 0;
}
} ZEND_HASH_FOREACH_END();
}
/* }}} */
int ZEND_FASTCALL zendlex(zend_parser_stack_elem *elem) /* {{{ */
{
zval zv;
int ret;
if (CG(increment_lineno)) {
CG(zend_lineno)++;
CG(increment_lineno) = 0;
}
ret = lex_scan(&zv, elem);
ZEND_ASSERT(!EG(exception) || ret == T_ERROR);
return ret;
}
/* }}} */
ZEND_API void zend_initialize_class_data(zend_class_entry *ce, zend_bool nullify_handlers) /* {{{ */
{
zend_bool persistent_hashes = ce->type == ZEND_INTERNAL_CLASS;
ce->refcount = 1;
ce->ce_flags = ZEND_ACC_CONSTANTS_UPDATED;
if (CG(compiler_options) & ZEND_COMPILE_GUARDS) {
ce->ce_flags |= ZEND_ACC_USE_GUARDS;
}
ce->default_properties_table = NULL;
ce->default_static_members_table = NULL;
zend_hash_init_ex(&ce->properties_info, 8, NULL, (persistent_hashes ? zend_destroy_property_info_internal : NULL), persistent_hashes, 0);
zend_hash_init_ex(&ce->constants_table, 8, NULL, NULL, persistent_hashes, 0);
zend_hash_init_ex(&ce->function_table, 8, NULL, ZEND_FUNCTION_DTOR, persistent_hashes, 0);
if (ce->type == ZEND_INTERNAL_CLASS) {
ZEND_MAP_PTR_INIT(ce->static_members_table, NULL);
} else {
ZEND_MAP_PTR_INIT(ce->static_members_table, &ce->default_static_members_table);
ce->info.user.doc_comment = NULL;
}
ce->default_properties_count = 0;
ce->default_static_members_count = 0;
ce->properties_info_table = NULL;
if (nullify_handlers) {
ce->constructor = NULL;
ce->destructor = NULL;
ce->clone = NULL;
ce->__get = NULL;
ce->__set = NULL;
ce->__unset = NULL;
ce->__isset = NULL;
ce->__call = NULL;
ce->__callstatic = NULL;
ce->__tostring = NULL;
ce->create_object = NULL;
ce->get_iterator = NULL;
ce->iterator_funcs_ptr = NULL;
ce->get_static_method = NULL;
ce->parent = NULL;
ce->parent_name = NULL;
ce->num_interfaces = 0;
ce->interfaces = NULL;
ce->num_traits = 0;
ce->trait_names = NULL;
ce->trait_aliases = NULL;
ce->trait_precedences = NULL;
ce->serialize = NULL;
ce->unserialize = NULL;
ce->serialize_func = NULL;
ce->unserialize_func = NULL;
ce->__debugInfo = NULL;
if (ce->type == ZEND_INTERNAL_CLASS) {
ce->info.internal.module = NULL;
ce->info.internal.builtin_functions = NULL;
}
}
}
/* }}} */
ZEND_API zend_string *zend_get_compiled_variable_name(const zend_op_array *op_array, uint32_t var) /* {{{ */
{
return op_array->vars[EX_VAR_TO_NUM(var)];
}
/* }}} */
zend_ast *zend_ast_append_str(zend_ast *left_ast, zend_ast *right_ast) /* {{{ */
{
zval *left_zv = zend_ast_get_zval(left_ast);
zend_string *left = Z_STR_P(left_zv);
zend_string *right = zend_ast_get_str(right_ast);
zend_string *result;
size_t left_len = ZSTR_LEN(left);
size_t len = left_len + ZSTR_LEN(right) + 1; /* left\right */
result = zend_string_extend(left, len, 0);
ZSTR_VAL(result)[left_len] = '\\';
memcpy(&ZSTR_VAL(result)[left_len + 1], ZSTR_VAL(right), ZSTR_LEN(right));
ZSTR_VAL(result)[len] = '\0';
zend_string_release_ex(right, 0);
ZVAL_STR(left_zv, result);
return left_ast;
}
/* }}} */
zend_ast *zend_negate_num_string(zend_ast *ast) /* {{{ */
{
zval *zv = zend_ast_get_zval(ast);
if (Z_TYPE_P(zv) == IS_LONG) {
if (Z_LVAL_P(zv) == 0) {
ZVAL_NEW_STR(zv, zend_string_init("-0", sizeof("-0")-1, 0));
} else {
ZEND_ASSERT(Z_LVAL_P(zv) > 0);
Z_LVAL_P(zv) *= -1;
}
} else if (Z_TYPE_P(zv) == IS_STRING) {
size_t orig_len = Z_STRLEN_P(zv);
Z_STR_P(zv) = zend_string_extend(Z_STR_P(zv), orig_len + 1, 0);
memmove(Z_STRVAL_P(zv) + 1, Z_STRVAL_P(zv), orig_len + 1);
Z_STRVAL_P(zv)[0] = '-';
} else {
ZEND_ASSERT(0);
}
return ast;
}
/* }}} */
void zend_verify_namespace(void) /* {{{ */
{
if (FC(has_bracketed_namespaces) && !FC(in_namespace)) {
zend_error_noreturn(E_COMPILE_ERROR, "No code may exist outside of namespace {}");
}
}
/* }}} */
/* {{{ zend_dirname
Returns directory name component of path */
ZEND_API size_t zend_dirname(char *path, size_t len)
{
register char *end = path + len - 1;
unsigned int len_adjust = 0;
#ifdef ZEND_WIN32
/* Note that on Win32 CWD is per drive (heritage from CP/M).
* This means dirname("c:foo") maps to "c:." or "c:" - which means CWD on C: drive.
*/
if ((2 <= len) && isalpha((int)((unsigned char *)path)[0]) && (':' == path[1])) {
/* Skip over the drive spec (if any) so as not to change */
path += 2;
len_adjust += 2;
if (2 == len) {
/* Return "c:" on Win32 for dirname("c:").
* It would be more consistent to return "c:."
* but that would require making the string *longer*.
*/
return len;
}
}
#endif
if (len == 0) {
/* Illegal use of this function */
return 0;
}
/* Strip trailing slashes */
while (end >= path && IS_SLASH_P(end)) {
end--;
}
if (end < path) {
/* The path only contained slashes */
path[0] = DEFAULT_SLASH;
path[1] = '\0';
return 1 + len_adjust;
}
/* Strip filename */
while (end >= path && !IS_SLASH_P(end)) {
end--;
}
if (end < path) {
/* No slash found, therefore return '.' */
path[0] = '.';
path[1] = '\0';
return 1 + len_adjust;
}
/* Strip slashes which came before the file name */
while (end >= path && IS_SLASH_P(end)) {
end--;
}
if (end < path) {
path[0] = DEFAULT_SLASH;
path[1] = '\0';
return 1 + len_adjust;
}
*(end+1) = '\0';
return (size_t)(end + 1 - path) + len_adjust;
}
/* }}} */
static void zend_adjust_for_fetch_type(zend_op *opline, znode *result, uint32_t type) /* {{{ */
{
zend_uchar factor = (opline->opcode == ZEND_FETCH_STATIC_PROP_R) ? 1 : 3;
switch (type) {
case BP_VAR_R:
opline->result_type = IS_TMP_VAR;
result->op_type = IS_TMP_VAR;
return;
case BP_VAR_W:
opline->opcode += 1 * factor;
return;
case BP_VAR_RW:
opline->opcode += 2 * factor;
return;
case BP_VAR_IS:
opline->result_type = IS_TMP_VAR;
result->op_type = IS_TMP_VAR;
opline->opcode += 3 * factor;
return;
case BP_VAR_FUNC_ARG:
opline->opcode += 4 * factor;
return;
case BP_VAR_UNSET:
opline->opcode += 5 * factor;
return;
EMPTY_SWITCH_DEFAULT_CASE()
}
}
/* }}} */
static inline void zend_make_var_result(znode *result, zend_op *opline) /* {{{ */
{
opline->result_type = IS_VAR;
opline->result.var = get_temporary_variable();
GET_NODE(result, opline->result);
}
/* }}} */
static inline void zend_make_tmp_result(znode *result, zend_op *opline) /* {{{ */
{
opline->result_type = IS_TMP_VAR;
opline->result.var = get_temporary_variable();
GET_NODE(result, opline->result);
}
/* }}} */
static zend_op *zend_emit_op(znode *result, zend_uchar opcode, znode *op1, znode *op2) /* {{{ */
{
zend_op *opline = get_next_op();
opline->opcode = opcode;
if (op1 != NULL) {
SET_NODE(opline->op1, op1);
}
if (op2 != NULL) {
SET_NODE(opline->op2, op2);
}
if (result) {
zend_make_var_result(result, opline);
}
return opline;
}
/* }}} */
static zend_op *zend_emit_op_tmp(znode *result, zend_uchar opcode, znode *op1, znode *op2) /* {{{ */
{
zend_op *opline = get_next_op();
opline->opcode = opcode;
if (op1 != NULL) {
SET_NODE(opline->op1, op1);
}
if (op2 != NULL) {
SET_NODE(opline->op2, op2);
}
if (result) {
zend_make_tmp_result(result, opline);
}
return opline;
}
/* }}} */
static void zend_emit_tick(void) /* {{{ */
{
zend_op *opline;
/* This prevents a double TICK generated by the parser statement of "declare()" */
if (CG(active_op_array)->last && CG(active_op_array)->opcodes[CG(active_op_array)->last - 1].opcode == ZEND_TICKS) {
return;
}
opline = get_next_op();
opline->opcode = ZEND_TICKS;
opline->extended_value = FC(declarables).ticks;
}
/* }}} */
static inline zend_op *zend_emit_op_data(znode *value) /* {{{ */
{
return zend_emit_op(NULL, ZEND_OP_DATA, value, NULL);
}
/* }}} */
static inline uint32_t zend_emit_jump(uint32_t opnum_target) /* {{{ */
{
uint32_t opnum = get_next_op_number();
zend_op *opline = zend_emit_op(NULL, ZEND_JMP, NULL, NULL);
opline->op1.opline_num = opnum_target;
return opnum;
}
/* }}} */
ZEND_API int zend_is_smart_branch(const zend_op *opline) /* {{{ */
{
switch (opline->opcode) {
case ZEND_IS_IDENTICAL:
case ZEND_IS_NOT_IDENTICAL:
case ZEND_IS_EQUAL:
case ZEND_IS_NOT_EQUAL:
case ZEND_IS_SMALLER:
case ZEND_IS_SMALLER_OR_EQUAL:
case ZEND_CASE:
case ZEND_ISSET_ISEMPTY_CV:
case ZEND_ISSET_ISEMPTY_VAR:
case ZEND_ISSET_ISEMPTY_DIM_OBJ:
case ZEND_ISSET_ISEMPTY_PROP_OBJ:
case ZEND_ISSET_ISEMPTY_STATIC_PROP:
case ZEND_INSTANCEOF:
case ZEND_TYPE_CHECK:
case ZEND_DEFINED:
case ZEND_IN_ARRAY:
case ZEND_ARRAY_KEY_EXISTS:
return 1;
default:
return 0;
}
}
/* }}} */
static inline uint32_t zend_emit_cond_jump(zend_uchar opcode, znode *cond, uint32_t opnum_target) /* {{{ */
{
uint32_t opnum = get_next_op_number();
zend_op *opline;
if (cond->op_type == IS_TMP_VAR && opnum > 0) {
opline = CG(active_op_array)->opcodes + opnum - 1;
if (opline->result_type == IS_TMP_VAR
&& opline->result.var == cond->u.op.var
&& zend_is_smart_branch(opline)) {
if (opcode == ZEND_JMPZ) {
opline->result_type = IS_TMP_VAR | IS_SMART_BRANCH_JMPZ;
} else {
ZEND_ASSERT(opcode == ZEND_JMPNZ);
opline->result_type = IS_TMP_VAR | IS_SMART_BRANCH_JMPNZ;
}
}
}
opline = zend_emit_op(NULL, opcode, cond, NULL);
opline->op2.opline_num = opnum_target;
return opnum;
}
/* }}} */
static inline void zend_update_jump_target(uint32_t opnum_jump, uint32_t opnum_target) /* {{{ */
{
zend_op *opline = &CG(active_op_array)->opcodes[opnum_jump];
switch (opline->opcode) {
case ZEND_JMP:
opline->op1.opline_num = opnum_target;
break;
case ZEND_JMPZ:
case ZEND_JMPNZ:
case ZEND_JMPZ_EX:
case ZEND_JMPNZ_EX:
case ZEND_JMP_SET:
case ZEND_COALESCE:
opline->op2.opline_num = opnum_target;
break;
EMPTY_SWITCH_DEFAULT_CASE()
}
}
/* }}} */
static inline void zend_update_jump_target_to_next(uint32_t opnum_jump) /* {{{ */
{
zend_update_jump_target(opnum_jump, get_next_op_number());
}
/* }}} */
static inline zend_op *zend_delayed_emit_op(znode *result, zend_uchar opcode, znode *op1, znode *op2) /* {{{ */
{
zend_op tmp_opline;
init_op(&tmp_opline);
tmp_opline.opcode = opcode;
if (op1 != NULL) {
SET_NODE(tmp_opline.op1, op1);
}
if (op2 != NULL) {
SET_NODE(tmp_opline.op2, op2);
}
if (result) {
zend_make_var_result(result, &tmp_opline);
}
zend_stack_push(&CG(delayed_oplines_stack), &tmp_opline);
return zend_stack_top(&CG(delayed_oplines_stack));
}
/* }}} */
static inline uint32_t zend_delayed_compile_begin(void) /* {{{ */
{
return zend_stack_count(&CG(delayed_oplines_stack));
}
/* }}} */
static zend_op *zend_delayed_compile_end(uint32_t offset) /* {{{ */
{
zend_op *opline = NULL, *oplines = zend_stack_base(&CG(delayed_oplines_stack));
uint32_t i, count = zend_stack_count(&CG(delayed_oplines_stack));
ZEND_ASSERT(count >= offset);
for (i = offset; i < count; ++i) {
opline = get_next_op();
memcpy(opline, &oplines[i], sizeof(zend_op));
}
CG(delayed_oplines_stack).top = offset;
return opline;
}
/* }}} */
#define ZEND_MEMOIZE_NONE 0
#define ZEND_MEMOIZE_COMPILE 1
#define ZEND_MEMOIZE_FETCH 2
static void zend_compile_memoized_expr(znode *result, zend_ast *expr) /* {{{ */
{
int memoize_mode = CG(memoize_mode);
if (memoize_mode == ZEND_MEMOIZE_COMPILE) {
znode memoized_result;
/* Go through normal compilation */
CG(memoize_mode) = ZEND_MEMOIZE_NONE;
zend_compile_expr(result, expr);
CG(memoize_mode) = ZEND_MEMOIZE_COMPILE;
if (result->op_type == IS_VAR) {
zend_emit_op(&memoized_result, ZEND_COPY_TMP, result, NULL);
} else if (result->op_type == IS_TMP_VAR) {
zend_emit_op_tmp(&memoized_result, ZEND_COPY_TMP, result, NULL);
} else {
if (result->op_type == IS_CONST) {
Z_TRY_ADDREF(result->u.constant);
}
memoized_result = *result;
}
zend_hash_index_update_mem(
CG(memoized_exprs), (uintptr_t) expr, &memoized_result, sizeof(znode));
} else if (memoize_mode == ZEND_MEMOIZE_FETCH) {
znode *memoized_result = zend_hash_index_find_ptr(CG(memoized_exprs), (uintptr_t) expr);
*result = *memoized_result;
if (result->op_type == IS_CONST) {
Z_TRY_ADDREF(result->u.constant);
}
} else {
ZEND_ASSERT(0);
}
}
/* }}} */
static size_t zend_type_get_num_classes(zend_type type) {
if (!ZEND_TYPE_HAS_CLASS(type)) {
return 0;
}
if (ZEND_TYPE_HAS_LIST(type)) {
return ZEND_TYPE_LIST(type)->num_types;
}
return 1;
}
static void zend_emit_return_type_check(
znode *expr, zend_arg_info *return_info, zend_bool implicit) /* {{{ */
{
zend_type type = return_info->type;
if (ZEND_TYPE_IS_SET(type)) {
zend_op *opline;
/* `return ...;` is illegal in a void function (but `return;` isn't) */
if (ZEND_TYPE_CONTAINS_CODE(type, IS_VOID)) {
if (expr) {
if (expr->op_type == IS_CONST && Z_TYPE(expr->u.constant) == IS_NULL) {
zend_error_noreturn(E_COMPILE_ERROR,
"A void function must not return a value "
"(did you mean \"return;\" instead of \"return null;\"?)");
} else {
zend_error_noreturn(E_COMPILE_ERROR, "A void function must not return a value");
}
}
/* we don't need run-time check */
return;
}
if (!expr && !implicit) {
if (ZEND_TYPE_ALLOW_NULL(type)) {
zend_error_noreturn(E_COMPILE_ERROR,
"A function with return type must return a value "
"(did you mean \"return null;\" instead of \"return;\"?)");
} else {
zend_error_noreturn(E_COMPILE_ERROR,
"A function with return type must return a value");
}
}
if (expr && expr->op_type == IS_CONST) {
if (ZEND_TYPE_CONTAINS_CODE(type, Z_TYPE(expr->u.constant))) {
/* we don't need run-time check */
return;
}
}
opline = zend_emit_op(NULL, ZEND_VERIFY_RETURN_TYPE, expr, NULL);
if (expr && expr->op_type == IS_CONST) {
opline->result_type = expr->op_type = IS_TMP_VAR;
opline->result.var = expr->u.op.var = get_temporary_variable();
}
opline->op2.num = zend_alloc_cache_slots(zend_type_get_num_classes(return_info->type));
}
}
/* }}} */
void zend_emit_final_return(int return_one) /* {{{ */
{
znode zn;
zend_op *ret;
zend_bool returns_reference = (CG(active_op_array)->fn_flags & ZEND_ACC_RETURN_REFERENCE) != 0;
if (CG(active_op_array)->fn_flags & ZEND_ACC_HAS_RETURN_TYPE
&& !(CG(active_op_array)->fn_flags & ZEND_ACC_GENERATOR)) {
zend_emit_return_type_check(NULL, CG(active_op_array)->arg_info - 1, 1);
}
zn.op_type = IS_CONST;
if (return_one) {
ZVAL_LONG(&zn.u.constant, 1);
} else {
ZVAL_NULL(&zn.u.constant);
}
ret = zend_emit_op(NULL, returns_reference ? ZEND_RETURN_BY_REF : ZEND_RETURN, &zn, NULL);
ret->extended_value = -1;
}
/* }}} */
static inline zend_bool zend_is_variable(zend_ast *ast) /* {{{ */
{
return ast->kind == ZEND_AST_VAR || ast->kind == ZEND_AST_DIM
|| ast->kind == ZEND_AST_PROP || ast->kind == ZEND_AST_STATIC_PROP;
}
/* }}} */
static inline zend_bool zend_is_call(zend_ast *ast) /* {{{ */
{
return ast->kind == ZEND_AST_CALL
|| ast->kind == ZEND_AST_METHOD_CALL
|| ast->kind == ZEND_AST_STATIC_CALL;
}
/* }}} */
static inline zend_bool zend_is_variable_or_call(zend_ast *ast) /* {{{ */
{
return zend_is_variable(ast) || zend_is_call(ast);
}
/* }}} */
static inline zend_bool zend_is_unticked_stmt(zend_ast *ast) /* {{{ */
{
return ast->kind == ZEND_AST_STMT_LIST || ast->kind == ZEND_AST_LABEL
|| ast->kind == ZEND_AST_PROP_DECL || ast->kind == ZEND_AST_CLASS_CONST_DECL
|| ast->kind == ZEND_AST_USE_TRAIT || ast->kind == ZEND_AST_METHOD;
}
/* }}} */
static inline zend_bool zend_can_write_to_variable(zend_ast *ast) /* {{{ */
{
while (ast->kind == ZEND_AST_DIM || ast->kind == ZEND_AST_PROP) {
ast = ast->child[0];
}
return zend_is_variable_or_call(ast);
}
/* }}} */
static inline zend_bool zend_is_const_default_class_ref(zend_ast *name_ast) /* {{{ */
{
if (name_ast->kind != ZEND_AST_ZVAL) {
return 0;
}
return ZEND_FETCH_CLASS_DEFAULT == zend_get_class_fetch_type_ast(name_ast);
}
/* }}} */
static inline void zend_handle_numeric_op(znode *node) /* {{{ */
{
if (node->op_type == IS_CONST && Z_TYPE(node->u.constant) == IS_STRING) {
zend_ulong index;
if (ZEND_HANDLE_NUMERIC(Z_STR(node->u.constant), index)) {
zval_ptr_dtor(&node->u.constant);
ZVAL_LONG(&node->u.constant, index);
}
}
}
/* }}} */
static inline void zend_handle_numeric_dim(zend_op *opline, znode *dim_node) /* {{{ */
{
if (Z_TYPE(dim_node->u.constant) == IS_STRING) {
zend_ulong index;
if (ZEND_HANDLE_NUMERIC(Z_STR(dim_node->u.constant), index)) {
/* For numeric indexes we also keep the original value to use by ArrayAccess
* See bug #63217
*/
int c = zend_add_literal(&dim_node->u.constant);
ZEND_ASSERT(opline->op2.constant + 1 == c);
ZVAL_LONG(CT_CONSTANT(opline->op2), index);
Z_EXTRA_P(CT_CONSTANT(opline->op2)) = ZEND_EXTRA_VALUE;
return;
}
}
}
/* }}} */
static inline void zend_set_class_name_op1(zend_op *opline, znode *class_node) /* {{{ */
{
if (class_node->op_type == IS_CONST) {
opline->op1_type = IS_CONST;
opline->op1.constant = zend_add_class_name_literal(
Z_STR(class_node->u.constant));
} else {
SET_NODE(opline->op1, class_node);
}
}
/* }}} */
static void zend_compile_class_ref(znode *result, zend_ast *name_ast, uint32_t fetch_flags) /* {{{ */
{
uint32_t fetch_type;
if (name_ast->kind != ZEND_AST_ZVAL) {
znode name_node;
zend_compile_expr(&name_node, name_ast);
if (name_node.op_type == IS_CONST) {
zend_string *name;
if (Z_TYPE(name_node.u.constant) != IS_STRING) {
zend_error_noreturn(E_COMPILE_ERROR, "Illegal class name");
}
name = Z_STR(name_node.u.constant);
fetch_type = zend_get_class_fetch_type(name);
if (fetch_type == ZEND_FETCH_CLASS_DEFAULT) {
result->op_type = IS_CONST;
ZVAL_STR(&result->u.constant, zend_resolve_class_name(name, ZEND_NAME_FQ));
} else {
zend_ensure_valid_class_fetch_type(fetch_type);
result->op_type = IS_UNUSED;
result->u.op.num = fetch_type | fetch_flags;
}
zend_string_release_ex(name, 0);
} else {
zend_op *opline = zend_emit_op(result, ZEND_FETCH_CLASS, NULL, &name_node);
opline->op1.num = ZEND_FETCH_CLASS_DEFAULT | fetch_flags;
}
return;
}
/* Fully qualified names are always default refs */
if (name_ast->attr == ZEND_NAME_FQ) {
result->op_type = IS_CONST;
ZVAL_STR(&result->u.constant, zend_resolve_class_name_ast(name_ast));
return;
}
fetch_type = zend_get_class_fetch_type(zend_ast_get_str(name_ast));
if (ZEND_FETCH_CLASS_DEFAULT == fetch_type) {
result->op_type = IS_CONST;
ZVAL_STR(&result->u.constant, zend_resolve_class_name_ast(name_ast));
} else {
zend_ensure_valid_class_fetch_type(fetch_type);
result->op_type = IS_UNUSED;
result->u.op.num = fetch_type | fetch_flags;
}
}
/* }}} */
static int zend_try_compile_cv(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *name_ast = ast->child[0];
if (name_ast->kind == ZEND_AST_ZVAL) {
zval *zv = zend_ast_get_zval(name_ast);
zend_string *name;
if (EXPECTED(Z_TYPE_P(zv) == IS_STRING)) {
name = zval_make_interned_string(zv);
} else {
name = zend_new_interned_string(zval_get_string_func(zv));
}
if (zend_is_auto_global(name)) {
return FAILURE;
}
result->op_type = IS_CV;
result->u.op.var = lookup_cv(name);
if (UNEXPECTED(Z_TYPE_P(zv) != IS_STRING)) {
zend_string_release_ex(name, 0);
}
return SUCCESS;
}
return FAILURE;
}
/* }}} */
static zend_op *zend_compile_simple_var_no_cv(znode *result, zend_ast *ast, uint32_t type, int delayed) /* {{{ */
{
zend_ast *name_ast = ast->child[0];
znode name_node;
zend_op *opline;
zend_compile_expr(&name_node, name_ast);
if (name_node.op_type == IS_CONST) {
convert_to_string(&name_node.u.constant);
}
if (delayed) {
opline = zend_delayed_emit_op(result, ZEND_FETCH_R, &name_node, NULL);
} else {
opline = zend_emit_op(result, ZEND_FETCH_R, &name_node, NULL);
}
if (name_node.op_type == IS_CONST &&
zend_is_auto_global(Z_STR(name_node.u.constant))) {
opline->extended_value = ZEND_FETCH_GLOBAL;
} else {
opline->extended_value = ZEND_FETCH_LOCAL;
}
zend_adjust_for_fetch_type(opline, result, type);
return opline;
}
/* }}} */
static zend_bool is_this_fetch(zend_ast *ast) /* {{{ */
{
if (ast->kind == ZEND_AST_VAR && ast->child[0]->kind == ZEND_AST_ZVAL) {
zval *name = zend_ast_get_zval(ast->child[0]);
return Z_TYPE_P(name) == IS_STRING && zend_string_equals_literal(Z_STR_P(name), "this");
}
return 0;
}
/* }}} */
static zend_bool this_guaranteed_exists() /* {{{ */
{
zend_op_array *op_array = CG(active_op_array);
/* Instance methods always have a $this.
* This also includes closures that have a scope and use $this. */
return op_array->scope != NULL
&& (op_array->fn_flags & ZEND_ACC_STATIC) == 0;
}
/* }}} */
static zend_op *zend_compile_simple_var(znode *result, zend_ast *ast, uint32_t type, int delayed) /* {{{ */
{
if (is_this_fetch(ast)) {
zend_op *opline = zend_emit_op(result, ZEND_FETCH_THIS, NULL, NULL);
if ((type == BP_VAR_R) || (type == BP_VAR_IS)) {
opline->result_type = IS_TMP_VAR;
result->op_type = IS_TMP_VAR;
}
CG(active_op_array)->fn_flags |= ZEND_ACC_USES_THIS;
return opline;
} else if (zend_try_compile_cv(result, ast) == FAILURE) {
return zend_compile_simple_var_no_cv(result, ast, type, delayed);
}
return NULL;
}
/* }}} */
static void zend_separate_if_call_and_write(znode *node, zend_ast *ast, uint32_t type) /* {{{ */
{
if (type != BP_VAR_R && type != BP_VAR_IS && zend_is_call(ast)) {
if (node->op_type == IS_VAR) {
zend_op *opline = zend_emit_op(NULL, ZEND_SEPARATE, node, NULL);
opline->result_type = IS_VAR;
opline->result.var = opline->op1.var;
} else {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot use result of built-in function in write context");
}
}
}
/* }}} */
zend_op *zend_delayed_compile_var(znode *result, zend_ast *ast, uint32_t type, zend_bool by_ref);
void zend_compile_assign(znode *result, zend_ast *ast);
static inline void zend_emit_assign_znode(zend_ast *var_ast, znode *value_node) /* {{{ */
{
znode dummy_node;
zend_ast *assign_ast = zend_ast_create(ZEND_AST_ASSIGN, var_ast,
zend_ast_create_znode(value_node));
zend_compile_assign(&dummy_node, assign_ast);
zend_do_free(&dummy_node);
}
/* }}} */
static zend_op *zend_delayed_compile_dim(znode *result, zend_ast *ast, uint32_t type) /* {{{ */
{
if (ast->attr == ZEND_DIM_ALTERNATIVE_SYNTAX) {
zend_error(E_DEPRECATED, "Array and string offset access syntax with curly braces is deprecated");
}
zend_ast *var_ast = ast->child[0];
zend_ast *dim_ast = ast->child[1];
zend_op *opline;
znode var_node, dim_node;
opline = zend_delayed_compile_var(&var_node, var_ast, type, 0);
if (opline && type == BP_VAR_W && (opline->opcode == ZEND_FETCH_STATIC_PROP_W || opline->opcode == ZEND_FETCH_OBJ_W)) {
opline->extended_value |= ZEND_FETCH_DIM_WRITE;
}
zend_separate_if_call_and_write(&var_node, var_ast, type);
if (dim_ast == NULL) {
if (type == BP_VAR_R || type == BP_VAR_IS) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot use [] for reading");
}
if (type == BP_VAR_UNSET) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot use [] for unsetting");
}
dim_node.op_type = IS_UNUSED;
} else {
zend_compile_expr(&dim_node, dim_ast);
}
opline = zend_delayed_emit_op(result, ZEND_FETCH_DIM_R, &var_node, &dim_node);
zend_adjust_for_fetch_type(opline, result, type);
if (dim_node.op_type == IS_CONST) {
zend_handle_numeric_dim(opline, &dim_node);
}
return opline;
}
/* }}} */
static zend_op *zend_compile_dim(znode *result, zend_ast *ast, uint32_t type) /* {{{ */
{
uint32_t offset = zend_delayed_compile_begin();
zend_delayed_compile_dim(result, ast, type);
return zend_delayed_compile_end(offset);
}
/* }}} */
static zend_op *zend_delayed_compile_prop(znode *result, zend_ast *ast, uint32_t type) /* {{{ */
{
zend_ast *obj_ast = ast->child[0];
zend_ast *prop_ast = ast->child[1];
znode obj_node, prop_node;
zend_op *opline;
if (is_this_fetch(obj_ast)) {
if (this_guaranteed_exists()) {
obj_node.op_type = IS_UNUSED;
} else {
zend_emit_op(&obj_node, ZEND_FETCH_THIS, NULL, NULL);
}
CG(active_op_array)->fn_flags |= ZEND_ACC_USES_THIS;
} else {
opline = zend_delayed_compile_var(&obj_node, obj_ast, type, 0);
zend_separate_if_call_and_write(&obj_node, obj_ast, type);
}
zend_compile_expr(&prop_node, prop_ast);
opline = zend_delayed_emit_op(result, ZEND_FETCH_OBJ_R, &obj_node, &prop_node);
if (opline->op2_type == IS_CONST) {
convert_to_string(CT_CONSTANT(opline->op2));
opline->extended_value = zend_alloc_cache_slots(3);
}
zend_adjust_for_fetch_type(opline, result, type);
return opline;
}
/* }}} */
static zend_op *zend_compile_prop(znode *result, zend_ast *ast, uint32_t type, int by_ref) /* {{{ */
{
uint32_t offset = zend_delayed_compile_begin();
zend_op *opline = zend_delayed_compile_prop(result, ast, type);
if (by_ref) { /* shared with cache_slot */
opline->extended_value |= ZEND_FETCH_REF;
}
return zend_delayed_compile_end(offset);
}
/* }}} */
zend_op *zend_compile_static_prop(znode *result, zend_ast *ast, uint32_t type, int by_ref, int delayed) /* {{{ */
{
zend_ast *class_ast = ast->child[0];
zend_ast *prop_ast = ast->child[1];
znode class_node, prop_node;
zend_op *opline;
zend_compile_class_ref(&class_node, class_ast, ZEND_FETCH_CLASS_EXCEPTION);
zend_compile_expr(&prop_node, prop_ast);
if (delayed) {
opline = zend_delayed_emit_op(result, ZEND_FETCH_STATIC_PROP_R, &prop_node, NULL);
} else {
opline = zend_emit_op(result, ZEND_FETCH_STATIC_PROP_R, &prop_node, NULL);
}
if (opline->op1_type == IS_CONST) {
convert_to_string(CT_CONSTANT(opline->op1));
opline->extended_value = zend_alloc_cache_slots(3);
}
if (class_node.op_type == IS_CONST) {
opline->op2_type = IS_CONST;
opline->op2.constant = zend_add_class_name_literal(
Z_STR(class_node.u.constant));
if (opline->op1_type != IS_CONST) {
opline->extended_value = zend_alloc_cache_slot();
}
} else {
SET_NODE(opline->op2, &class_node);
}
if (by_ref && (type == BP_VAR_W || type == BP_VAR_FUNC_ARG)) { /* shared with cache_slot */
opline->extended_value |= ZEND_FETCH_REF;
}
zend_adjust_for_fetch_type(opline, result, type);
return opline;
}
/* }}} */
static void zend_verify_list_assign_target(zend_ast *var_ast, zend_bool old_style) /* {{{ */ {
if (var_ast->kind == ZEND_AST_ARRAY) {
if (var_ast->attr == ZEND_ARRAY_SYNTAX_LONG) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot assign to array(), use [] instead");
}
if (old_style != var_ast->attr) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot mix [] and list()");
}
} else if (!zend_can_write_to_variable(var_ast)) {
zend_error_noreturn(E_COMPILE_ERROR, "Assignments can only happen to writable values");
}
}
/* }}} */
static inline void zend_emit_assign_ref_znode(zend_ast *var_ast, znode *value_node);
/* Propagate refs used on leaf elements to the surrounding list() structures. */
static zend_bool zend_propagate_list_refs(zend_ast *ast) { /* {{{ */
zend_ast_list *list = zend_ast_get_list(ast);
zend_bool has_refs = 0;
uint32_t i;
for (i = 0; i < list->children; ++i) {
zend_ast *elem_ast = list->child[i];
if (elem_ast) {
zend_ast *var_ast = elem_ast->child[0];
if (var_ast->kind == ZEND_AST_ARRAY) {
elem_ast->attr = zend_propagate_list_refs(var_ast);
}
has_refs |= elem_ast->attr;
}
}
return has_refs;
}
/* }}} */
static void zend_compile_list_assign(
znode *result, zend_ast *ast, znode *expr_node, zend_bool old_style) /* {{{ */
{
zend_ast_list *list = zend_ast_get_list(ast);
uint32_t i;
zend_bool has_elems = 0;
zend_bool is_keyed =
list->children > 0 && list->child[0] != NULL && list->child[0]->child[1] != NULL;
if (list->children && expr_node->op_type == IS_CONST && Z_TYPE(expr_node->u.constant) == IS_STRING) {
zval_make_interned_string(&expr_node->u.constant);
}
for (i = 0; i < list->children; ++i) {
zend_ast *elem_ast = list->child[i];
zend_ast *var_ast, *key_ast;
znode fetch_result, dim_node;
zend_op *opline;
if (elem_ast == NULL) {
if (is_keyed) {
zend_error(E_COMPILE_ERROR,
"Cannot use empty array entries in keyed array assignment");
} else {
continue;
}
}
if (elem_ast->kind == ZEND_AST_UNPACK) {
zend_error(E_COMPILE_ERROR,
"Spread operator is not supported in assignments");
}
var_ast = elem_ast->child[0];
key_ast = elem_ast->child[1];
has_elems = 1;
if (is_keyed) {
if (key_ast == NULL) {
zend_error(E_COMPILE_ERROR,
"Cannot mix keyed and unkeyed array entries in assignments");
}
zend_compile_expr(&dim_node, key_ast);
} else {
if (key_ast != NULL) {
zend_error(E_COMPILE_ERROR,
"Cannot mix keyed and unkeyed array entries in assignments");
}
dim_node.op_type = IS_CONST;
ZVAL_LONG(&dim_node.u.constant, i);
}
if (expr_node->op_type == IS_CONST) {
Z_TRY_ADDREF(expr_node->u.constant);
}
zend_verify_list_assign_target(var_ast, old_style);
opline = zend_emit_op(&fetch_result,
elem_ast->attr ? (expr_node->op_type == IS_CV ? ZEND_FETCH_DIM_W : ZEND_FETCH_LIST_W) : ZEND_FETCH_LIST_R, expr_node, &dim_node);
if (dim_node.op_type == IS_CONST) {
zend_handle_numeric_dim(opline, &dim_node);
}
if (var_ast->kind == ZEND_AST_ARRAY) {
if (elem_ast->attr) {
zend_emit_op(&fetch_result, ZEND_MAKE_REF, &fetch_result, NULL);
}
zend_compile_list_assign(NULL, var_ast, &fetch_result, var_ast->attr);
} else if (elem_ast->attr) {
zend_emit_assign_ref_znode(var_ast, &fetch_result);
} else {
zend_emit_assign_znode(var_ast, &fetch_result);
}
}
if (has_elems == 0) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot use empty list");
}
if (result) {
*result = *expr_node;
} else {
zend_do_free(expr_node);
}
}
/* }}} */
static void zend_ensure_writable_variable(const zend_ast *ast) /* {{{ */
{
if (ast->kind == ZEND_AST_CALL) {
zend_error_noreturn(E_COMPILE_ERROR, "Can't use function return value in write context");
}
if (ast->kind == ZEND_AST_METHOD_CALL || ast->kind == ZEND_AST_STATIC_CALL) {
zend_error_noreturn(E_COMPILE_ERROR, "Can't use method return value in write context");
}
}
/* }}} */
/* Detects $a... = $a pattern */
zend_bool zend_is_assign_to_self(zend_ast *var_ast, zend_ast *expr_ast) /* {{{ */
{
if (expr_ast->kind != ZEND_AST_VAR || expr_ast->child[0]->kind != ZEND_AST_ZVAL) {
return 0;
}
while (zend_is_variable(var_ast) && var_ast->kind != ZEND_AST_VAR) {
var_ast = var_ast->child[0];
}
if (var_ast->kind != ZEND_AST_VAR || var_ast->child[0]->kind != ZEND_AST_ZVAL) {
return 0;
}
{
zend_string *name1 = zval_get_string(zend_ast_get_zval(var_ast->child[0]));
zend_string *name2 = zval_get_string(zend_ast_get_zval(expr_ast->child[0]));
zend_bool result = zend_string_equals(name1, name2);
zend_string_release_ex(name1, 0);
zend_string_release_ex(name2, 0);
return result;
}
}
/* }}} */
void zend_compile_assign(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *var_ast = ast->child[0];
zend_ast *expr_ast = ast->child[1];
znode var_node, expr_node;
zend_op *opline;
uint32_t offset;
if (is_this_fetch(var_ast)) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot re-assign $this");
}
zend_ensure_writable_variable(var_ast);
switch (var_ast->kind) {
case ZEND_AST_VAR:
offset = zend_delayed_compile_begin();
zend_delayed_compile_var(&var_node, var_ast, BP_VAR_W, 0);
zend_compile_expr(&expr_node, expr_ast);
zend_delayed_compile_end(offset);
zend_emit_op(result, ZEND_ASSIGN, &var_node, &expr_node);
return;
case ZEND_AST_STATIC_PROP:
offset = zend_delayed_compile_begin();
zend_delayed_compile_var(result, var_ast, BP_VAR_W, 0);
zend_compile_expr(&expr_node, expr_ast);
opline = zend_delayed_compile_end(offset);
opline->opcode = ZEND_ASSIGN_STATIC_PROP;
zend_emit_op_data(&expr_node);
return;
case ZEND_AST_DIM:
offset = zend_delayed_compile_begin();
zend_delayed_compile_dim(result, var_ast, BP_VAR_W);
if (zend_is_assign_to_self(var_ast, expr_ast)
&& !is_this_fetch(expr_ast)) {
/* $a[0] = $a should evaluate the right $a first */
znode cv_node;
if (zend_try_compile_cv(&cv_node, expr_ast) == FAILURE) {
zend_compile_simple_var_no_cv(&expr_node, expr_ast, BP_VAR_R, 0);
} else {
zend_emit_op_tmp(&expr_node, ZEND_QM_ASSIGN, &cv_node, NULL);
}
} else {
zend_compile_expr(&expr_node, expr_ast);
}
opline = zend_delayed_compile_end(offset);
opline->opcode = ZEND_ASSIGN_DIM;
opline = zend_emit_op_data(&expr_node);
return;
case ZEND_AST_PROP:
offset = zend_delayed_compile_begin();
zend_delayed_compile_prop(result, var_ast, BP_VAR_W);
zend_compile_expr(&expr_node, expr_ast);
opline = zend_delayed_compile_end(offset);
opline->opcode = ZEND_ASSIGN_OBJ;
zend_emit_op_data(&expr_node);
return;
case ZEND_AST_ARRAY:
if (zend_propagate_list_refs(var_ast)) {
if (!zend_is_variable_or_call(expr_ast)) {
zend_error_noreturn(E_COMPILE_ERROR,
"Cannot assign reference to non referencable value");
}
zend_compile_var(&expr_node, expr_ast, BP_VAR_W, 1);
/* MAKE_REF is usually not necessary for CVs. However, if there are
* self-assignments, this forces the RHS to evaluate first. */
zend_emit_op(&expr_node, ZEND_MAKE_REF, &expr_node, NULL);
} else {
if (expr_ast->kind == ZEND_AST_VAR) {
/* list($a, $b) = $a should evaluate the right $a first */
znode cv_node;
if (zend_try_compile_cv(&cv_node, expr_ast) == FAILURE) {
zend_compile_simple_var_no_cv(&expr_node, expr_ast, BP_VAR_R, 0);
} else {
zend_emit_op_tmp(&expr_node, ZEND_QM_ASSIGN, &cv_node, NULL);
}
} else {
zend_compile_expr(&expr_node, expr_ast);
}
}
zend_compile_list_assign(result, var_ast, &expr_node, var_ast->attr);
return;
EMPTY_SWITCH_DEFAULT_CASE();
}
}
/* }}} */
void zend_compile_assign_ref(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *target_ast = ast->child[0];
zend_ast *source_ast = ast->child[1];
znode target_node, source_node;
zend_op *opline;
uint32_t offset, flags;
if (is_this_fetch(target_ast)) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot re-assign $this");
}
zend_ensure_writable_variable(target_ast);
offset = zend_delayed_compile_begin();
zend_delayed_compile_var(&target_node, target_ast, BP_VAR_W, 1);
zend_compile_var(&source_node, source_ast, BP_VAR_W, 1);
if ((target_ast->kind != ZEND_AST_VAR
|| target_ast->child[0]->kind != ZEND_AST_ZVAL)
&& source_node.op_type != IS_CV) {
/* Both LHS and RHS expressions may modify the same data structure,
* and the modification during RHS evaluation may dangle the pointer
* to the result of the LHS evaluation.
* Use MAKE_REF instruction to replace direct pointer with REFERENCE.
* See: Bug #71539
*/
zend_emit_op(&source_node, ZEND_MAKE_REF, &source_node, NULL);
}
opline = zend_delayed_compile_end(offset);
if (source_node.op_type != IS_VAR && zend_is_call(source_ast)) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot use result of built-in function in write context");
}
flags = zend_is_call(source_ast) ? ZEND_RETURNS_FUNCTION : 0;
if (opline && opline->opcode == ZEND_FETCH_OBJ_W) {
opline->opcode = ZEND_ASSIGN_OBJ_REF;
opline->extended_value &= ~ZEND_FETCH_REF;
opline->extended_value |= flags;
zend_emit_op_data(&source_node);
if (result != NULL) {
*result = target_node;
}
} else if (opline && opline->opcode == ZEND_FETCH_STATIC_PROP_W) {
opline->opcode = ZEND_ASSIGN_STATIC_PROP_REF;
opline->extended_value &= ~ZEND_FETCH_REF;
opline->extended_value |= flags;
zend_emit_op_data(&source_node);
if (result != NULL) {
*result = target_node;
}
} else {
opline = zend_emit_op(result, ZEND_ASSIGN_REF, &target_node, &source_node);
opline->extended_value = flags;
}
}
/* }}} */
static inline void zend_emit_assign_ref_znode(zend_ast *var_ast, znode *value_node) /* {{{ */
{
zend_ast *assign_ast = zend_ast_create(ZEND_AST_ASSIGN_REF, var_ast,
zend_ast_create_znode(value_node));
zend_compile_assign_ref(NULL, assign_ast);
}
/* }}} */
void zend_compile_compound_assign(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *var_ast = ast->child[0];
zend_ast *expr_ast = ast->child[1];
uint32_t opcode = ast->attr;
znode var_node, expr_node;
zend_op *opline;
uint32_t offset, cache_slot;
zend_ensure_writable_variable(var_ast);
switch (var_ast->kind) {
case ZEND_AST_VAR:
offset = zend_delayed_compile_begin();
zend_delayed_compile_var(&var_node, var_ast, BP_VAR_RW, 0);
zend_compile_expr(&expr_node, expr_ast);
zend_delayed_compile_end(offset);
opline = zend_emit_op(result, ZEND_ASSIGN_OP, &var_node, &expr_node);
opline->extended_value = opcode;
return;
case ZEND_AST_STATIC_PROP:
offset = zend_delayed_compile_begin();
zend_delayed_compile_var(result, var_ast, BP_VAR_RW, 0);
zend_compile_expr(&expr_node, expr_ast);
opline = zend_delayed_compile_end(offset);
cache_slot = opline->extended_value;
opline->opcode = ZEND_ASSIGN_STATIC_PROP_OP;
opline->extended_value = opcode;
opline = zend_emit_op_data(&expr_node);
opline->extended_value = cache_slot;
return;
case ZEND_AST_DIM:
offset = zend_delayed_compile_begin();
zend_delayed_compile_dim(result, var_ast, BP_VAR_RW);
zend_compile_expr(&expr_node, expr_ast);
opline = zend_delayed_compile_end(offset);
opline->opcode = ZEND_ASSIGN_DIM_OP;
opline->extended_value = opcode;
zend_emit_op_data(&expr_node);
return;
case ZEND_AST_PROP:
offset = zend_delayed_compile_begin();
zend_delayed_compile_prop(result, var_ast, BP_VAR_RW);
zend_compile_expr(&expr_node, expr_ast);
opline = zend_delayed_compile_end(offset);
cache_slot = opline->extended_value;
opline->opcode = ZEND_ASSIGN_OBJ_OP;
opline->extended_value = opcode;
opline = zend_emit_op_data(&expr_node);
opline->extended_value = cache_slot;
return;
EMPTY_SWITCH_DEFAULT_CASE()
}
}
/* }}} */
uint32_t zend_compile_args(zend_ast *ast, zend_function *fbc) /* {{{ */
{
zend_ast_list *args = zend_ast_get_list(ast);
uint32_t i;
zend_bool uses_arg_unpack = 0;
uint32_t arg_count = 0; /* number of arguments not including unpacks */
for (i = 0; i < args->children; ++i) {
zend_ast *arg = args->child[i];
uint32_t arg_num = i + 1;
znode arg_node;
zend_op *opline;
zend_uchar opcode;
if (arg->kind == ZEND_AST_UNPACK) {
uses_arg_unpack = 1;
fbc = NULL;
zend_compile_expr(&arg_node, arg->child[0]);
opline = zend_emit_op(NULL, ZEND_SEND_UNPACK, &arg_node, NULL);
opline->op2.num = arg_count;
opline->result.var = (uint32_t)(zend_intptr_t)ZEND_CALL_ARG(NULL, arg_count);
continue;
}
if (uses_arg_unpack) {
zend_error_noreturn(E_COMPILE_ERROR,
"Cannot use positional argument after argument unpacking");
}
arg_count++;
if (zend_is_call(arg)) {
zend_compile_var(&arg_node, arg, BP_VAR_R, 0);
if (arg_node.op_type & (IS_CONST|IS_TMP_VAR)) {
/* Function call was converted into builtin instruction */
opcode = ZEND_SEND_VAL;
} else {
if (fbc) {
if (ARG_MUST_BE_SENT_BY_REF(fbc, arg_num)) {
opcode = ZEND_SEND_VAR_NO_REF;
} else if (ARG_MAY_BE_SENT_BY_REF(fbc, arg_num)) {
opcode = ZEND_SEND_VAL;
} else {
opcode = ZEND_SEND_VAR;
}
} else {
opcode = ZEND_SEND_VAR_NO_REF_EX;
}
}
} else if (zend_is_variable(arg)) {
if (fbc) {
if (ARG_SHOULD_BE_SENT_BY_REF(fbc, arg_num)) {
zend_compile_var(&arg_node, arg, BP_VAR_W, 1);
opcode = ZEND_SEND_REF;
} else {
zend_compile_var(&arg_node, arg, BP_VAR_R, 0);
opcode = (arg_node.op_type == IS_TMP_VAR) ? ZEND_SEND_VAL : ZEND_SEND_VAR;
}
} else {
do {
if (arg->kind == ZEND_AST_VAR) {
CG(zend_lineno) = zend_ast_get_lineno(ast);
if (is_this_fetch(arg)) {
zend_emit_op(&arg_node, ZEND_FETCH_THIS, NULL, NULL);
opcode = ZEND_SEND_VAR_EX;
CG(active_op_array)->fn_flags |= ZEND_ACC_USES_THIS;
break;
} else if (zend_try_compile_cv(&arg_node, arg) == SUCCESS) {
opcode = ZEND_SEND_VAR_EX;
break;
}
}
opline = zend_emit_op(NULL, ZEND_CHECK_FUNC_ARG, NULL, NULL);
opline->op2.num = arg_num;
zend_compile_var(&arg_node, arg, BP_VAR_FUNC_ARG, 1);
opcode = ZEND_SEND_FUNC_ARG;
} while (0);
}
} else {
zend_compile_expr(&arg_node, arg);
if (arg_node.op_type == IS_VAR) {
/* pass ++$a or something similar */
if (fbc) {
if (ARG_MUST_BE_SENT_BY_REF(fbc, arg_num)) {
opcode = ZEND_SEND_VAR_NO_REF;
} else if (ARG_MAY_BE_SENT_BY_REF(fbc, arg_num)) {
opcode = ZEND_SEND_VAL;
} else {
opcode = ZEND_SEND_VAR;
}
} else {
opcode = ZEND_SEND_VAR_NO_REF_EX;
}
} else if (arg_node.op_type == IS_CV) {
if (fbc) {
if (ARG_SHOULD_BE_SENT_BY_REF(fbc, arg_num)) {
opcode = ZEND_SEND_REF;
} else {
opcode = ZEND_SEND_VAR;
}
} else {
opcode = ZEND_SEND_VAR_EX;
}
} else {
if (fbc) {
opcode = ZEND_SEND_VAL;
if (ARG_MUST_BE_SENT_BY_REF(fbc, arg_num)) {
zend_error_noreturn(E_COMPILE_ERROR, "Only variables can be passed by reference");
}
} else {
opcode = ZEND_SEND_VAL_EX;
}
}
}
opline = zend_emit_op(NULL, opcode, &arg_node, NULL);
opline->op2.opline_num = arg_num;
opline->result.var = (uint32_t)(zend_intptr_t)ZEND_CALL_ARG(NULL, arg_num);
}
return arg_count;
}
/* }}} */
ZEND_API zend_uchar zend_get_call_op(const zend_op *init_op, zend_function *fbc) /* {{{ */
{
if (fbc) {
if (fbc->type == ZEND_INTERNAL_FUNCTION && !(CG(compiler_options) & ZEND_COMPILE_IGNORE_INTERNAL_FUNCTIONS)) {
if (init_op->opcode == ZEND_INIT_FCALL && !zend_execute_internal) {
if (!(fbc->common.fn_flags & (ZEND_ACC_ABSTRACT|ZEND_ACC_DEPRECATED))) {
return ZEND_DO_ICALL;
} else {
return ZEND_DO_FCALL_BY_NAME;
}
}
} else if (!(CG(compiler_options) & ZEND_COMPILE_IGNORE_USER_FUNCTIONS)){
if (zend_execute_ex == execute_ex && !(fbc->common.fn_flags & ZEND_ACC_ABSTRACT)) {
return ZEND_DO_UCALL;
}
}
} else if (zend_execute_ex == execute_ex &&
!zend_execute_internal &&
(init_op->opcode == ZEND_INIT_FCALL_BY_NAME ||
init_op->opcode == ZEND_INIT_NS_FCALL_BY_NAME)) {
return ZEND_DO_FCALL_BY_NAME;
}
return ZEND_DO_FCALL;
}
/* }}} */
void zend_compile_call_common(znode *result, zend_ast *args_ast, zend_function *fbc) /* {{{ */
{
zend_op *opline;
uint32_t opnum_init = get_next_op_number() - 1;
uint32_t arg_count;
arg_count = zend_compile_args(args_ast, fbc);
zend_do_extended_fcall_begin();
opline = &CG(active_op_array)->opcodes[opnum_init];
opline->extended_value = arg_count;
if (opline->opcode == ZEND_INIT_FCALL) {
opline->op1.num = zend_vm_calc_used_stack(arg_count, fbc);
}
opline = zend_emit_op(result, zend_get_call_op(opline, fbc), NULL, NULL);
zend_do_extended_fcall_end();
}
/* }}} */
zend_bool zend_compile_function_name(znode *name_node, zend_ast *name_ast) /* {{{ */
{
zend_string *orig_name = zend_ast_get_str(name_ast);
zend_bool is_fully_qualified;
name_node->op_type = IS_CONST;
ZVAL_STR(&name_node->u.constant, zend_resolve_function_name(
orig_name, name_ast->attr, &is_fully_qualified));
return !is_fully_qualified && FC(current_namespace);
}
/* }}} */
void zend_compile_ns_call(znode *result, znode *name_node, zend_ast *args_ast) /* {{{ */
{
zend_op *opline = get_next_op();
opline->opcode = ZEND_INIT_NS_FCALL_BY_NAME;
opline->op2_type = IS_CONST;
opline->op2.constant = zend_add_ns_func_name_literal(
Z_STR(name_node->u.constant));
opline->result.num = zend_alloc_cache_slot();
zend_compile_call_common(result, args_ast, NULL);
}
/* }}} */
void zend_compile_dynamic_call(znode *result, znode *name_node, zend_ast *args_ast) /* {{{ */
{
if (name_node->op_type == IS_CONST && Z_TYPE(name_node->u.constant) == IS_STRING) {
const char *colon;
zend_string *str = Z_STR(name_node->u.constant);
if ((colon = zend_memrchr(ZSTR_VAL(str), ':', ZSTR_LEN(str))) != NULL && colon > ZSTR_VAL(str) && *(colon - 1) == ':') {
zend_string *class = zend_string_init(ZSTR_VAL(str), colon - ZSTR_VAL(str) - 1, 0);
zend_string *method = zend_string_init(colon + 1, ZSTR_LEN(str) - (colon - ZSTR_VAL(str)) - 1, 0);
zend_op *opline = get_next_op();
opline->opcode = ZEND_INIT_STATIC_METHOD_CALL;
opline->op1_type = IS_CONST;
opline->op1.constant = zend_add_class_name_literal(class);
opline->op2_type = IS_CONST;
opline->op2.constant = zend_add_func_name_literal(method);
/* 2 slots, for class and method */
opline->result.num = zend_alloc_cache_slots(2);
zval_ptr_dtor(&name_node->u.constant);
} else {
zend_op *opline = get_next_op();
opline->opcode = ZEND_INIT_FCALL_BY_NAME;
opline->op2_type = IS_CONST;
opline->op2.constant = zend_add_func_name_literal(str);
opline->result.num = zend_alloc_cache_slot();
}
} else {
zend_emit_op(NULL, ZEND_INIT_DYNAMIC_CALL, NULL, name_node);
}
zend_compile_call_common(result, args_ast, NULL);
}
/* }}} */
static inline zend_bool zend_args_contain_unpack(zend_ast_list *args) /* {{{ */
{
uint32_t i;
for (i = 0; i < args->children; ++i) {
if (args->child[i]->kind == ZEND_AST_UNPACK) {
return 1;
}
}
return 0;
}
/* }}} */
int zend_compile_func_strlen(znode *result, zend_ast_list *args) /* {{{ */
{
znode arg_node;
if (args->children != 1) {
return FAILURE;
}
zend_compile_expr(&arg_node, args->child[0]);
if (arg_node.op_type == IS_CONST && Z_TYPE(arg_node.u.constant) == IS_STRING) {
result->op_type = IS_CONST;
ZVAL_LONG(&result->u.constant, Z_STRLEN(arg_node.u.constant));
zval_ptr_dtor_str(&arg_node.u.constant);
} else {
zend_emit_op_tmp(result, ZEND_STRLEN, &arg_node, NULL);
}
return SUCCESS;
}
/* }}} */
int zend_compile_func_typecheck(znode *result, zend_ast_list *args, uint32_t type) /* {{{ */
{
znode arg_node;
zend_op *opline;
if (args->children != 1) {
return FAILURE;
}
zend_compile_expr(&arg_node, args->child[0]);
opline = zend_emit_op_tmp(result, ZEND_TYPE_CHECK, &arg_node, NULL);
if (type != _IS_BOOL) {
opline->extended_value = (1 << type);
} else {
opline->extended_value = (1 << IS_FALSE) | (1 << IS_TRUE);
}
return SUCCESS;
}
/* }}} */
static int zend_compile_func_is_scalar(znode *result, zend_ast_list *args) /* {{{ */
{
znode arg_node;
zend_op *opline;
if (args->children != 1) {
return FAILURE;
}
zend_compile_expr(&arg_node, args->child[0]);
opline = zend_emit_op_tmp(result, ZEND_TYPE_CHECK, &arg_node, NULL);
opline->extended_value = (1 << IS_FALSE | 1 << IS_TRUE | 1 << IS_DOUBLE | 1 << IS_LONG | 1 << IS_STRING);
return SUCCESS;
}
int zend_compile_func_cast(znode *result, zend_ast_list *args, uint32_t type) /* {{{ */
{
znode arg_node;
zend_op *opline;
if (args->children != 1) {
return FAILURE;
}
zend_compile_expr(&arg_node, args->child[0]);
if (type == _IS_BOOL) {
opline = zend_emit_op_tmp(result, ZEND_BOOL, &arg_node, NULL);
} else {
opline = zend_emit_op_tmp(result, ZEND_CAST, &arg_node, NULL);
opline->extended_value = type;
}
return SUCCESS;
}
/* }}} */
int zend_compile_func_defined(znode *result, zend_ast_list *args) /* {{{ */
{
zend_string *name;
zend_op *opline;
if (args->children != 1 || args->child[0]->kind != ZEND_AST_ZVAL) {
return FAILURE;
}
name = zval_get_string(zend_ast_get_zval(args->child[0]));
if (zend_memrchr(ZSTR_VAL(name), '\\', ZSTR_LEN(name)) || zend_memrchr(ZSTR_VAL(name), ':', ZSTR_LEN(name))) {
zend_string_release_ex(name, 0);
return FAILURE;
}
if (zend_try_ct_eval_const(&result->u.constant, name, 0)) {
zend_string_release_ex(name, 0);
zval_ptr_dtor(&result->u.constant);
ZVAL_TRUE(&result->u.constant);
result->op_type = IS_CONST;
return SUCCESS;
}
opline = zend_emit_op_tmp(result, ZEND_DEFINED, NULL, NULL);
opline->op1_type = IS_CONST;
LITERAL_STR(opline->op1, name);
opline->extended_value = zend_alloc_cache_slot();
return SUCCESS;
}
/* }}} */
int zend_compile_func_chr(znode *result, zend_ast_list *args) /* {{{ */
{
if (args->children == 1 &&
args->child[0]->kind == ZEND_AST_ZVAL &&
Z_TYPE_P(zend_ast_get_zval(args->child[0])) == IS_LONG) {
zend_long c = Z_LVAL_P(zend_ast_get_zval(args->child[0])) & 0xff;
result->op_type = IS_CONST;
ZVAL_INTERNED_STR(&result->u.constant, ZSTR_CHAR(c));
return SUCCESS;
} else {
return FAILURE;
}
}
/* }}} */
int zend_compile_func_ord(znode *result, zend_ast_list *args) /* {{{ */
{
if (args->children == 1 &&
args->child[0]->kind == ZEND_AST_ZVAL &&
Z_TYPE_P(zend_ast_get_zval(args->child[0])) == IS_STRING) {
result->op_type = IS_CONST;
ZVAL_LONG(&result->u.constant, (unsigned char)Z_STRVAL_P(zend_ast_get_zval(args->child[0]))[0]);
return SUCCESS;
} else {
return FAILURE;
}
}
/* }}} */
/* We can only calculate the stack size for functions that have been fully compiled, otherwise
* additional CV or TMP slots may still be added. This prevents the use of INIT_FCALL for
* directly or indirectly recursive function calls. */
static zend_bool fbc_is_finalized(zend_function *fbc) {
return !ZEND_USER_CODE(fbc->type) || (fbc->common.fn_flags & ZEND_ACC_DONE_PASS_TWO);
}
static int zend_try_compile_ct_bound_init_user_func(zend_ast *name_ast, uint32_t num_args) /* {{{ */
{
zend_string *name, *lcname;
zend_function *fbc;
zend_op *opline;
if (name_ast->kind != ZEND_AST_ZVAL || Z_TYPE_P(zend_ast_get_zval(name_ast)) != IS_STRING) {
return FAILURE;
}
name = zend_ast_get_str(name_ast);
lcname = zend_string_tolower(name);
fbc = zend_hash_find_ptr(CG(function_table), lcname);
if (!fbc || !fbc_is_finalized(fbc)
|| (fbc->type == ZEND_INTERNAL_FUNCTION && (CG(compiler_options) & ZEND_COMPILE_IGNORE_INTERNAL_FUNCTIONS))
|| (fbc->type == ZEND_USER_FUNCTION && (CG(compiler_options) & ZEND_COMPILE_IGNORE_USER_FUNCTIONS))
|| (fbc->type == ZEND_USER_FUNCTION && (CG(compiler_options) & ZEND_COMPILE_IGNORE_OTHER_FILES) && fbc->op_array.filename != CG(active_op_array)->filename)
) {
zend_string_release_ex(lcname, 0);
return FAILURE;
}
opline = zend_emit_op(NULL, ZEND_INIT_FCALL, NULL, NULL);
opline->extended_value = num_args;
opline->op1.num = zend_vm_calc_used_stack(num_args, fbc);
opline->op2_type = IS_CONST;
LITERAL_STR(opline->op2, lcname);
opline->result.num = zend_alloc_cache_slot();
return SUCCESS;
}
/* }}} */
static void zend_compile_init_user_func(zend_ast *name_ast, uint32_t num_args, zend_string *orig_func_name) /* {{{ */
{
zend_op *opline;
znode name_node;
if (zend_try_compile_ct_bound_init_user_func(name_ast, num_args) == SUCCESS) {
return;
}
zend_compile_expr(&name_node, name_ast);
opline = zend_emit_op(NULL, ZEND_INIT_USER_CALL, NULL, &name_node);
opline->op1_type = IS_CONST;
LITERAL_STR(opline->op1, zend_string_copy(orig_func_name));
opline->extended_value = num_args;
}
/* }}} */
/* cufa = call_user_func_array */
int zend_compile_func_cufa(znode *result, zend_ast_list *args, zend_string *lcname) /* {{{ */
{
znode arg_node;
if (args->children != 2) {
return FAILURE;
}
zend_compile_init_user_func(args->child[0], 0, lcname);
if (args->child[1]->kind == ZEND_AST_CALL
&& args->child[1]->child[0]->kind == ZEND_AST_ZVAL
&& Z_TYPE_P(zend_ast_get_zval(args->child[1]->child[0])) == IS_STRING
&& args->child[1]->child[1]->kind == ZEND_AST_ARG_LIST) {
zend_string *orig_name = zend_ast_get_str(args->child[1]->child[0]);
zend_ast_list *list = zend_ast_get_list(args->child[1]->child[1]);
zend_bool is_fully_qualified;
zend_string *name = zend_resolve_function_name(orig_name, args->child[1]->child[0]->attr, &is_fully_qualified);
if (zend_string_equals_literal_ci(name, "array_slice")
&& list->children == 3
&& list->child[1]->kind == ZEND_AST_ZVAL) {
zval *zv = zend_ast_get_zval(list->child[1]);
if (Z_TYPE_P(zv) == IS_LONG
&& Z_LVAL_P(zv) >= 0
&& Z_LVAL_P(zv) <= 0x7fffffff) {
zend_op *opline;
znode len_node;
zend_compile_expr(&arg_node, list->child[0]);
zend_compile_expr(&len_node, list->child[2]);
opline = zend_emit_op(NULL, ZEND_SEND_ARRAY, &arg_node, &len_node);
opline->extended_value = Z_LVAL_P(zv);
zend_emit_op(result, ZEND_DO_FCALL, NULL, NULL);
zend_string_release_ex(name, 0);
return SUCCESS;
}
}
zend_string_release_ex(name, 0);
}
zend_compile_expr(&arg_node, args->child[1]);
zend_emit_op(NULL, ZEND_SEND_ARRAY, &arg_node, NULL);
zend_emit_op(result, ZEND_DO_FCALL, NULL, NULL);
return SUCCESS;
}
/* }}} */
/* cuf = call_user_func */
int zend_compile_func_cuf(znode *result, zend_ast_list *args, zend_string *lcname) /* {{{ */
{
uint32_t i;
if (args->children < 1) {
return FAILURE;
}
zend_compile_init_user_func(args->child[0], args->children - 1, lcname);
for (i = 1; i < args->children; ++i) {
zend_ast *arg_ast = args->child[i];
znode arg_node;
zend_op *opline;
zend_compile_expr(&arg_node, arg_ast);
opline = zend_emit_op(NULL, ZEND_SEND_USER, &arg_node, NULL);
opline->op2.num = i;
opline->result.var = (uint32_t)(zend_intptr_t)ZEND_CALL_ARG(NULL, i);
}
zend_emit_op(result, ZEND_DO_FCALL, NULL, NULL);
return SUCCESS;
}
/* }}} */
static void zend_compile_assert(znode *result, zend_ast_list *args, zend_string *name, zend_function *fbc) /* {{{ */
{
if (EG(assertions) >= 0) {
znode name_node;
zend_op *opline;
uint32_t check_op_number = get_next_op_number();
zend_emit_op(NULL, ZEND_ASSERT_CHECK, NULL, NULL);
if (fbc && fbc_is_finalized(fbc)) {
name_node.op_type = IS_CONST;
ZVAL_STR_COPY(&name_node.u.constant, name);
opline = zend_emit_op(NULL, ZEND_INIT_FCALL, NULL, &name_node);
} else {
opline = zend_emit_op(NULL, ZEND_INIT_NS_FCALL_BY_NAME, NULL, NULL);
opline->op2_type = IS_CONST;
opline->op2.constant = zend_add_ns_func_name_literal(name);
}
opline->result.num = zend_alloc_cache_slot();
if (args->children == 1 &&
(args->child[0]->kind != ZEND_AST_ZVAL ||
Z_TYPE_P(zend_ast_get_zval(args->child[0])) != IS_STRING)) {
/* add "assert(condition) as assertion message */
zend_ast_list_add((zend_ast*)args,
zend_ast_create_zval_from_str(
zend_ast_export("assert(", args->child[0], ")")));
}
zend_compile_call_common(result, (zend_ast*)args, fbc);
opline = &CG(active_op_array)->opcodes[check_op_number];
opline->op2.opline_num = get_next_op_number();
SET_NODE(opline->result, result);
} else {
if (!fbc) {
zend_string_release_ex(name, 0);
}
result->op_type = IS_CONST;
ZVAL_TRUE(&result->u.constant);
}
}
/* }}} */
static int zend_compile_func_in_array(znode *result, zend_ast_list *args) /* {{{ */
{
zend_bool strict = 0;
znode array, needly;
zend_op *opline;
if (args->children == 3) {
if (args->child[2]->kind == ZEND_AST_ZVAL) {
strict = zend_is_true(zend_ast_get_zval(args->child[2]));
} else if (args->child[2]->kind == ZEND_AST_CONST) {
zval value;
zend_ast *name_ast = args->child[2]->child[0];
zend_bool is_fully_qualified;
zend_string *resolved_name = zend_resolve_const_name(
zend_ast_get_str(name_ast), name_ast->attr, &is_fully_qualified);
if (!zend_try_ct_eval_const(&value, resolved_name, is_fully_qualified)) {
zend_string_release_ex(resolved_name, 0);
return FAILURE;
}
zend_string_release_ex(resolved_name, 0);
strict = zend_is_true(&value);
zval_ptr_dtor(&value);
} else {
return FAILURE;
}
} else if (args->children != 2) {
return FAILURE;
}
if (args->child[1]->kind != ZEND_AST_ARRAY
|| !zend_try_ct_eval_array(&array.u.constant, args->child[1])) {
return FAILURE;
}
if (zend_hash_num_elements(Z_ARRVAL(array.u.constant)) > 0) {
zend_bool ok = 1;
zval *val, tmp;
HashTable *src = Z_ARRVAL(array.u.constant);
HashTable *dst = zend_new_array(zend_hash_num_elements(src));
ZVAL_TRUE(&tmp);
if (strict) {
ZEND_HASH_FOREACH_VAL(src, val) {
if (Z_TYPE_P(val) == IS_STRING) {
zend_hash_add(dst, Z_STR_P(val), &tmp);
} else if (Z_TYPE_P(val) == IS_LONG) {
zend_hash_index_add(dst, Z_LVAL_P(val), &tmp);
} else {
zend_array_destroy(dst);
ok = 0;
break;
}
} ZEND_HASH_FOREACH_END();
} else {
ZEND_HASH_FOREACH_VAL(src, val) {
if (Z_TYPE_P(val) != IS_STRING
|| is_numeric_string(Z_STRVAL_P(val), Z_STRLEN_P(val), NULL, NULL, 0)) {
zend_array_destroy(dst);
ok = 0;
break;
}
zend_hash_add(dst, Z_STR_P(val), &tmp);
} ZEND_HASH_FOREACH_END();
}
zend_array_destroy(src);
if (!ok) {
return FAILURE;
}
Z_ARRVAL(array.u.constant) = dst;
}
array.op_type = IS_CONST;
zend_compile_expr(&needly, args->child[0]);
opline = zend_emit_op_tmp(result, ZEND_IN_ARRAY, &needly, &array);
opline->extended_value = strict;
return SUCCESS;
}
/* }}} */
int zend_compile_func_count(znode *result, zend_ast_list *args, zend_string *lcname) /* {{{ */
{
znode arg_node;
zend_op *opline;
if (args->children != 1) {
return FAILURE;
}
zend_compile_expr(&arg_node, args->child[0]);
opline = zend_emit_op_tmp(result, ZEND_COUNT, &arg_node, NULL);
opline->extended_value = zend_string_equals_literal(lcname, "sizeof");
return SUCCESS;
}
/* }}} */
int zend_compile_func_get_class(znode *result, zend_ast_list *args) /* {{{ */
{
if (args->children == 0) {
zend_emit_op_tmp(result, ZEND_GET_CLASS, NULL, NULL);
} else {
znode arg_node;
if (args->children != 1) {
return FAILURE;
}
zend_compile_expr(&arg_node, args->child[0]);
zend_emit_op_tmp(result, ZEND_GET_CLASS, &arg_node, NULL);
}
return SUCCESS;
}
/* }}} */
int zend_compile_func_get_called_class(znode *result, zend_ast_list *args) /* {{{ */
{
if (args->children != 0) {
return FAILURE;
}
zend_emit_op_tmp(result, ZEND_GET_CALLED_CLASS, NULL, NULL);
return SUCCESS;
}
/* }}} */
int zend_compile_func_gettype(znode *result, zend_ast_list *args) /* {{{ */
{
znode arg_node;
if (args->children != 1) {
return FAILURE;
}
zend_compile_expr(&arg_node, args->child[0]);
zend_emit_op_tmp(result, ZEND_GET_TYPE, &arg_node, NULL);
return SUCCESS;
}
/* }}} */
int zend_compile_func_num_args(znode *result, zend_ast_list *args) /* {{{ */
{
if (CG(active_op_array)->function_name && args->children == 0) {
zend_emit_op_tmp(result, ZEND_FUNC_NUM_ARGS, NULL, NULL);
return SUCCESS;
} else {
return FAILURE;
}
}
/* }}} */
int zend_compile_func_get_args(znode *result, zend_ast_list *args) /* {{{ */
{
if (CG(active_op_array)->function_name && args->children == 0) {
zend_emit_op_tmp(result, ZEND_FUNC_GET_ARGS, NULL, NULL);
return SUCCESS;
} else {
return FAILURE;
}
}
/* }}} */
int zend_compile_func_array_key_exists(znode *result, zend_ast_list *args) /* {{{ */
{
znode subject, needle;
if (args->children != 2) {
return FAILURE;
}
zend_compile_expr(&needle, args->child[0]);
zend_compile_expr(&subject, args->child[1]);
zend_emit_op_tmp(result, ZEND_ARRAY_KEY_EXISTS, &needle, &subject);
return SUCCESS;
}
/* }}} */
int zend_compile_func_array_slice(znode *result, zend_ast_list *args) /* {{{ */
{
if (CG(active_op_array)->function_name
&& args->children == 2
&& args->child[0]->kind == ZEND_AST_CALL
&& args->child[0]->child[0]->kind == ZEND_AST_ZVAL
&& Z_TYPE_P(zend_ast_get_zval(args->child[0]->child[0])) == IS_STRING
&& args->child[0]->child[1]->kind == ZEND_AST_ARG_LIST
&& args->child[1]->kind == ZEND_AST_ZVAL) {
zend_string *orig_name = zend_ast_get_str(args->child[0]->child[0]);
zend_bool is_fully_qualified;
zend_string *name = zend_resolve_function_name(orig_name, args->child[0]->child[0]->attr, &is_fully_qualified);
zend_ast_list *list = zend_ast_get_list(args->child[0]->child[1]);
zval *zv = zend_ast_get_zval(args->child[1]);
znode first;
if (zend_string_equals_literal_ci(name, "func_get_args")
&& list->children == 0
&& Z_TYPE_P(zv) == IS_LONG
&& Z_LVAL_P(zv) >= 0) {
first.op_type = IS_CONST;
ZVAL_LONG(&first.u.constant, Z_LVAL_P(zv));
zend_emit_op_tmp(result, ZEND_FUNC_GET_ARGS, &first, NULL);
zend_string_release_ex(name, 0);
return SUCCESS;
}
zend_string_release_ex(name, 0);
}
return FAILURE;
}
/* }}} */
int zend_try_compile_special_func(znode *result, zend_string *lcname, zend_ast_list *args, zend_function *fbc, uint32_t type) /* {{{ */
{
if (fbc->internal_function.handler == ZEND_FN(display_disabled_function)) {
return FAILURE;
}
if (CG(compiler_options) & ZEND_COMPILE_NO_BUILTINS) {
return FAILURE;
}
if (zend_args_contain_unpack(args)) {
return FAILURE;
}
if (zend_string_equals_literal(lcname, "strlen")) {
return zend_compile_func_strlen(result, args);
} else if (zend_string_equals_literal(lcname, "is_null")) {
return zend_compile_func_typecheck(result, args, IS_NULL);
} else if (zend_string_equals_literal(lcname, "is_bool")) {
return zend_compile_func_typecheck(result, args, _IS_BOOL);
} else if (zend_string_equals_literal(lcname, "is_long")
|| zend_string_equals_literal(lcname, "is_int")
|| zend_string_equals_literal(lcname, "is_integer")
) {
return zend_compile_func_typecheck(result, args, IS_LONG);
} else if (zend_string_equals_literal(lcname, "is_float")
|| zend_string_equals_literal(lcname, "is_double")
) {
return zend_compile_func_typecheck(result, args, IS_DOUBLE);
} else if (zend_string_equals_literal(lcname, "is_string")) {
return zend_compile_func_typecheck(result, args, IS_STRING);
} else if (zend_string_equals_literal(lcname, "is_array")) {
return zend_compile_func_typecheck(result, args, IS_ARRAY);
} else if (zend_string_equals_literal(lcname, "is_object")) {
return zend_compile_func_typecheck(result, args, IS_OBJECT);
} else if (zend_string_equals_literal(lcname, "is_resource")) {
return zend_compile_func_typecheck(result, args, IS_RESOURCE);
} else if (zend_string_equals_literal(lcname, "is_scalar")) {
return zend_compile_func_is_scalar(result, args);
} else if (zend_string_equals_literal(lcname, "boolval")) {
return zend_compile_func_cast(result, args, _IS_BOOL);
} else if (zend_string_equals_literal(lcname, "intval")) {
return zend_compile_func_cast(result, args, IS_LONG);
} else if (zend_string_equals_literal(lcname, "floatval")
|| zend_string_equals_literal(lcname, "doubleval")
) {
return zend_compile_func_cast(result, args, IS_DOUBLE);
} else if (zend_string_equals_literal(lcname, "strval")) {
return zend_compile_func_cast(result, args, IS_STRING);
} else if (zend_string_equals_literal(lcname, "defined")) {
return zend_compile_func_defined(result, args);
} else if (zend_string_equals_literal(lcname, "chr") && type == BP_VAR_R) {
return zend_compile_func_chr(result, args);
} else if (zend_string_equals_literal(lcname, "ord") && type == BP_VAR_R) {
return zend_compile_func_ord(result, args);
} else if (zend_string_equals_literal(lcname, "call_user_func_array")) {
return zend_compile_func_cufa(result, args, lcname);
} else if (zend_string_equals_literal(lcname, "call_user_func")) {
return zend_compile_func_cuf(result, args, lcname);
} else if (zend_string_equals_literal(lcname, "in_array")) {
return zend_compile_func_in_array(result, args);
} else if (zend_string_equals_literal(lcname, "count")
|| zend_string_equals_literal(lcname, "sizeof")) {
return zend_compile_func_count(result, args, lcname);
} else if (zend_string_equals_literal(lcname, "get_class")) {
return zend_compile_func_get_class(result, args);
} else if (zend_string_equals_literal(lcname, "get_called_class")) {
return zend_compile_func_get_called_class(result, args);
} else if (zend_string_equals_literal(lcname, "gettype")) {
return zend_compile_func_gettype(result, args);
} else if (zend_string_equals_literal(lcname, "func_num_args")) {
return zend_compile_func_num_args(result, args);
} else if (zend_string_equals_literal(lcname, "func_get_args")) {
return zend_compile_func_get_args(result, args);
} else if (zend_string_equals_literal(lcname, "array_slice")) {
return zend_compile_func_array_slice(result, args);
} else if (zend_string_equals_literal(lcname, "array_key_exists")) {
return zend_compile_func_array_key_exists(result, args);
} else {
return FAILURE;
}
}
/* }}} */
void zend_compile_call(znode *result, zend_ast *ast, uint32_t type) /* {{{ */
{
zend_ast *name_ast = ast->child[0];
zend_ast *args_ast = ast->child[1];
znode name_node;
if (name_ast->kind != ZEND_AST_ZVAL || Z_TYPE_P(zend_ast_get_zval(name_ast)) != IS_STRING) {
zend_compile_expr(&name_node, name_ast);
zend_compile_dynamic_call(result, &name_node, args_ast);
return;
}
{
zend_bool runtime_resolution = zend_compile_function_name(&name_node, name_ast);
if (runtime_resolution) {
if (zend_string_equals_literal_ci(zend_ast_get_str(name_ast), "assert")) {
zend_compile_assert(result, zend_ast_get_list(args_ast), Z_STR(name_node.u.constant), NULL);
} else {
zend_compile_ns_call(result, &name_node, args_ast);
}
return;
}
}
{
zval *name = &name_node.u.constant;
zend_string *lcname;
zend_function *fbc;
zend_op *opline;
lcname = zend_string_tolower(Z_STR_P(name));
fbc = zend_hash_find_ptr(CG(function_table), lcname);
/* Special assert() handling should apply independently of compiler flags. */
if (fbc && zend_string_equals_literal(lcname, "assert")) {
zend_compile_assert(result, zend_ast_get_list(args_ast), lcname, fbc);
zend_string_release(lcname);
zval_ptr_dtor(&name_node.u.constant);
return;
}
if (!fbc || !fbc_is_finalized(fbc)
|| (fbc->type == ZEND_INTERNAL_FUNCTION && (CG(compiler_options) & ZEND_COMPILE_IGNORE_INTERNAL_FUNCTIONS))
|| (fbc->type == ZEND_USER_FUNCTION && (CG(compiler_options) & ZEND_COMPILE_IGNORE_USER_FUNCTIONS))
|| (fbc->type == ZEND_USER_FUNCTION && (CG(compiler_options) & ZEND_COMPILE_IGNORE_OTHER_FILES) && fbc->op_array.filename != CG(active_op_array)->filename)
) {
zend_string_release_ex(lcname, 0);
zend_compile_dynamic_call(result, &name_node, args_ast);
return;
}
if (zend_try_compile_special_func(result, lcname,
zend_ast_get_list(args_ast), fbc, type) == SUCCESS
) {
zend_string_release_ex(lcname, 0);
zval_ptr_dtor(&name_node.u.constant);
return;
}
zval_ptr_dtor(&name_node.u.constant);
ZVAL_NEW_STR(&name_node.u.constant, lcname);
opline = zend_emit_op(NULL, ZEND_INIT_FCALL, NULL, &name_node);
opline->result.num = zend_alloc_cache_slot();
zend_compile_call_common(result, args_ast, fbc);
}
}
/* }}} */
void zend_compile_method_call(znode *result, zend_ast *ast, uint32_t type) /* {{{ */
{
zend_ast *obj_ast = ast->child[0];
zend_ast *method_ast = ast->child[1];
zend_ast *args_ast = ast->child[2];
znode obj_node, method_node;
zend_op *opline;
zend_function *fbc = NULL;
if (is_this_fetch(obj_ast)) {
if (this_guaranteed_exists()) {
obj_node.op_type = IS_UNUSED;
} else {
zend_emit_op(&obj_node, ZEND_FETCH_THIS, NULL, NULL);
}
CG(active_op_array)->fn_flags |= ZEND_ACC_USES_THIS;
} else {
zend_compile_expr(&obj_node, obj_ast);
}
zend_compile_expr(&method_node, method_ast);
opline = zend_emit_op(NULL, ZEND_INIT_METHOD_CALL, &obj_node, NULL);
if (method_node.op_type == IS_CONST) {
if (Z_TYPE(method_node.u.constant) != IS_STRING) {
zend_error_noreturn(E_COMPILE_ERROR, "Method name must be a string");
}
opline->op2_type = IS_CONST;
opline->op2.constant = zend_add_func_name_literal(
Z_STR(method_node.u.constant));
opline->result.num = zend_alloc_cache_slots(2);
} else {
SET_NODE(opline->op2, &method_node);
}
/* Check if this calls a known method on $this */
if (opline->op1_type == IS_UNUSED && opline->op2_type == IS_CONST &&
CG(active_class_entry) && zend_is_scope_known()) {
zend_string *lcname = Z_STR_P(CT_CONSTANT(opline->op2) + 1);
fbc = zend_hash_find_ptr(&CG(active_class_entry)->function_table, lcname);
/* We only know the exact method that is being called if it is either private or final.
* Otherwise an overriding method in a child class may be called. */
if (fbc && !(fbc->common.fn_flags & (ZEND_ACC_PRIVATE|ZEND_ACC_FINAL))) {
fbc = NULL;
}
}
zend_compile_call_common(result, args_ast, fbc);
}
/* }}} */
static zend_bool zend_is_constructor(zend_string *name) /* {{{ */
{
return zend_string_equals_literal_ci(name, ZEND_CONSTRUCTOR_FUNC_NAME);
}
/* }}} */
static zend_function *zend_get_compatible_func_or_null(zend_class_entry *ce, zend_string *lcname) /* {{{ */
{
zend_function *fbc = zend_hash_find_ptr(&ce->function_table, lcname);
if (!fbc || (fbc->common.fn_flags & ZEND_ACC_PUBLIC) || ce == CG(active_class_entry)) {
return fbc;
}
if (!(fbc->common.fn_flags & ZEND_ACC_PRIVATE)
&& (fbc->common.scope->ce_flags & ZEND_ACC_LINKED)
&& (!CG(active_class_entry) || (CG(active_class_entry)->ce_flags & ZEND_ACC_LINKED))
&& zend_check_protected(zend_get_function_root_class(fbc), CG(active_class_entry))) {
return fbc;
}
return NULL;
}
/* }}} */
void zend_compile_static_call(znode *result, zend_ast *ast, uint32_t type) /* {{{ */
{
zend_ast *class_ast = ast->child[0];
zend_ast *method_ast = ast->child[1];
zend_ast *args_ast = ast->child[2];
znode class_node, method_node;
zend_op *opline;
zend_function *fbc = NULL;
zend_compile_class_ref(&class_node, class_ast, ZEND_FETCH_CLASS_EXCEPTION);
zend_compile_expr(&method_node, method_ast);
if (method_node.op_type == IS_CONST) {
zval *name = &method_node.u.constant;
if (Z_TYPE_P(name) != IS_STRING) {
zend_error_noreturn(E_COMPILE_ERROR, "Method name must be a string");
}
if (zend_is_constructor(Z_STR_P(name))) {
zval_ptr_dtor(name);
method_node.op_type = IS_UNUSED;
}
}
opline = get_next_op();
opline->opcode = ZEND_INIT_STATIC_METHOD_CALL;
zend_set_class_name_op1(opline, &class_node);
if (method_node.op_type == IS_CONST) {
opline->op2_type = IS_CONST;
opline->op2.constant = zend_add_func_name_literal(
Z_STR(method_node.u.constant));
opline->result.num = zend_alloc_cache_slots(2);
} else {
if (opline->op1_type == IS_CONST) {
opline->result.num = zend_alloc_cache_slot();
}
SET_NODE(opline->op2, &method_node);
}
/* Check if we already know which method we're calling */
if (opline->op2_type == IS_CONST) {
zend_class_entry *ce = NULL;
if (opline->op1_type == IS_CONST) {
zend_string *lcname = Z_STR_P(CT_CONSTANT(opline->op1) + 1);
ce = zend_hash_find_ptr(CG(class_table), lcname);
if (!ce && CG(active_class_entry)
&& zend_string_equals_ci(CG(active_class_entry)->name, lcname)) {
ce = CG(active_class_entry);
}
} else if (opline->op1_type == IS_UNUSED
&& (opline->op1.num & ZEND_FETCH_CLASS_MASK) == ZEND_FETCH_CLASS_SELF
&& zend_is_scope_known()) {
ce = CG(active_class_entry);
}
if (ce) {
zend_string *lcname = Z_STR_P(CT_CONSTANT(opline->op2) + 1);
fbc = zend_get_compatible_func_or_null(ce, lcname);
}
}
zend_compile_call_common(result, args_ast, fbc);
}
/* }}} */
zend_op *zend_compile_class_decl(zend_ast *ast, zend_bool toplevel);
void zend_compile_new(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *class_ast = ast->child[0];
zend_ast *args_ast = ast->child[1];
znode class_node, ctor_result;
zend_op *opline;
if (class_ast->kind == ZEND_AST_CLASS) {
/* anon class declaration */
opline = zend_compile_class_decl(class_ast, 0);
class_node.op_type = opline->result_type;
class_node.u.op.var = opline->result.var;
} else {
zend_compile_class_ref(&class_node, class_ast, ZEND_FETCH_CLASS_EXCEPTION);
}
opline = zend_emit_op(result, ZEND_NEW, NULL, NULL);
if (class_node.op_type == IS_CONST) {
opline->op1_type = IS_CONST;
opline->op1.constant = zend_add_class_name_literal(
Z_STR(class_node.u.constant));
opline->op2.num = zend_alloc_cache_slot();
} else {
SET_NODE(opline->op1, &class_node);
}
zend_compile_call_common(&ctor_result, args_ast, NULL);
zend_do_free(&ctor_result);
}
/* }}} */
void zend_compile_clone(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *obj_ast = ast->child[0];
znode obj_node;
zend_compile_expr(&obj_node, obj_ast);
zend_emit_op_tmp(result, ZEND_CLONE, &obj_node, NULL);
}
/* }}} */
void zend_compile_global_var(zend_ast *ast) /* {{{ */
{
zend_ast *var_ast = ast->child[0];
zend_ast *name_ast = var_ast->child[0];
znode name_node, result;
zend_compile_expr(&name_node, name_ast);
if (name_node.op_type == IS_CONST) {
convert_to_string(&name_node.u.constant);
}
if (is_this_fetch(var_ast)) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot use $this as global variable");
} else if (zend_try_compile_cv(&result, var_ast) == SUCCESS) {
zend_op *opline = zend_emit_op(NULL, ZEND_BIND_GLOBAL, &result, &name_node);
opline->extended_value = zend_alloc_cache_slot();
} else {
/* name_ast should be evaluated only. FETCH_GLOBAL_LOCK instructs FETCH_W
* to not free the name_node operand, so it can be reused in the following
* ASSIGN_REF, which then frees it. */
zend_op *opline = zend_emit_op(&result, ZEND_FETCH_W, &name_node, NULL);
opline->extended_value = ZEND_FETCH_GLOBAL_LOCK;
if (name_node.op_type == IS_CONST) {
zend_string_addref(Z_STR(name_node.u.constant));
}
zend_emit_assign_ref_znode(
zend_ast_create(ZEND_AST_VAR, zend_ast_create_znode(&name_node)),
&result
);
}
}
/* }}} */
static void zend_compile_static_var_common(zend_string *var_name, zval *value, uint32_t mode) /* {{{ */
{
zend_op *opline;
if (!CG(active_op_array)->static_variables) {
if (CG(active_op_array)->scope) {
CG(active_op_array)->scope->ce_flags |= ZEND_HAS_STATIC_IN_METHODS;
}
CG(active_op_array)->static_variables = zend_new_array(8);
}
value = zend_hash_update(CG(active_op_array)->static_variables, var_name, value);
if (zend_string_equals_literal(var_name, "this")) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot use $this as static variable");
}
opline = zend_emit_op(NULL, ZEND_BIND_STATIC, NULL, NULL);
opline->op1_type = IS_CV;
opline->op1.var = lookup_cv(var_name);
opline->extended_value = (uint32_t)((char*)value - (char*)CG(active_op_array)->static_variables->arData) | mode;
}
/* }}} */
void zend_compile_static_var(zend_ast *ast) /* {{{ */
{
zend_ast *var_ast = ast->child[0];
zend_ast *value_ast = ast->child[1];
zval value_zv;
if (value_ast) {
zend_const_expr_to_zval(&value_zv, value_ast);
} else {
ZVAL_NULL(&value_zv);
}
zend_compile_static_var_common(zend_ast_get_str(var_ast), &value_zv, ZEND_BIND_REF);
}
/* }}} */
void zend_compile_unset(zend_ast *ast) /* {{{ */
{
zend_ast *var_ast = ast->child[0];
znode var_node;
zend_op *opline;
zend_ensure_writable_variable(var_ast);
switch (var_ast->kind) {
case ZEND_AST_VAR:
if (is_this_fetch(var_ast)) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot unset $this");
} else if (zend_try_compile_cv(&var_node, var_ast) == SUCCESS) {
opline = zend_emit_op(NULL, ZEND_UNSET_CV, &var_node, NULL);
} else {
opline = zend_compile_simple_var_no_cv(NULL, var_ast, BP_VAR_UNSET, 0);
opline->opcode = ZEND_UNSET_VAR;
}
return;
case ZEND_AST_DIM:
opline = zend_compile_dim(NULL, var_ast, BP_VAR_UNSET);
opline->opcode = ZEND_UNSET_DIM;
return;
case ZEND_AST_PROP:
opline = zend_compile_prop(NULL, var_ast, BP_VAR_UNSET, 0);
opline->opcode = ZEND_UNSET_OBJ;
return;
case ZEND_AST_STATIC_PROP:
opline = zend_compile_static_prop(NULL, var_ast, BP_VAR_UNSET, 0, 0);
opline->opcode = ZEND_UNSET_STATIC_PROP;
return;
EMPTY_SWITCH_DEFAULT_CASE()
}
}
/* }}} */
static int zend_handle_loops_and_finally_ex(zend_long depth, znode *return_value) /* {{{ */
{
zend_loop_var *base;
zend_loop_var *loop_var = zend_stack_top(&CG(loop_var_stack));
if (!loop_var) {
return 1;
}
base = zend_stack_base(&CG(loop_var_stack));
for (; loop_var >= base; loop_var--) {
if (loop_var->opcode == ZEND_FAST_CALL) {
zend_op *opline = get_next_op();
opline->opcode = ZEND_FAST_CALL;
opline->result_type = IS_TMP_VAR;
opline->result.var = loop_var->var_num;
if (return_value) {
SET_NODE(opline->op2, return_value);
}
opline->op1.num = loop_var->try_catch_offset;
} else if (loop_var->opcode == ZEND_DISCARD_EXCEPTION) {
zend_op *opline = get_next_op();
opline->opcode = ZEND_DISCARD_EXCEPTION;
opline->op1_type = IS_TMP_VAR;
opline->op1.var = loop_var->var_num;
} else if (loop_var->opcode == ZEND_RETURN) {
/* Stack separator */
break;
} else if (depth <= 1) {
return 1;
} else if (loop_var->opcode == ZEND_NOP) {
/* Loop doesn't have freeable variable */
depth--;
} else {
zend_op *opline;
ZEND_ASSERT(loop_var->var_type & (IS_VAR|IS_TMP_VAR));
opline = get_next_op();
opline->opcode = loop_var->opcode;
opline->op1_type = loop_var->var_type;
opline->op1.var = loop_var->var_num;
opline->extended_value = ZEND_FREE_ON_RETURN;
depth--;
}
}
return (depth == 0);
}
/* }}} */
static int zend_handle_loops_and_finally(znode *return_value) /* {{{ */
{
return zend_handle_loops_and_finally_ex(zend_stack_count(&CG(loop_var_stack)) + 1, return_value);
}
/* }}} */
static int zend_has_finally_ex(zend_long depth) /* {{{ */
{
zend_loop_var *base;
zend_loop_var *loop_var = zend_stack_top(&CG(loop_var_stack));
if (!loop_var) {
return 0;
}
base = zend_stack_base(&CG(loop_var_stack));
for (; loop_var >= base; loop_var--) {
if (loop_var->opcode == ZEND_FAST_CALL) {
return 1;
} else if (loop_var->opcode == ZEND_DISCARD_EXCEPTION) {
} else if (loop_var->opcode == ZEND_RETURN) {
/* Stack separator */
return 0;
} else if (depth <= 1) {
return 0;
} else {
depth--;
}
}
return 0;
}
/* }}} */
static int zend_has_finally(void) /* {{{ */
{
return zend_has_finally_ex(zend_stack_count(&CG(loop_var_stack)) + 1);
}
/* }}} */
void zend_compile_return(zend_ast *ast) /* {{{ */
{
zend_ast *expr_ast = ast->child[0];
zend_bool is_generator = (CG(active_op_array)->fn_flags & ZEND_ACC_GENERATOR) != 0;
zend_bool by_ref = (CG(active_op_array)->fn_flags & ZEND_ACC_RETURN_REFERENCE) != 0;
znode expr_node;
zend_op *opline;
if (is_generator) {
/* For generators the by-ref flag refers to yields, not returns */
by_ref = 0;
}
if (!expr_ast) {
expr_node.op_type = IS_CONST;
ZVAL_NULL(&expr_node.u.constant);
} else if (by_ref && zend_is_variable(expr_ast)) {
zend_compile_var(&expr_node, expr_ast, BP_VAR_W, 1);
} else {
zend_compile_expr(&expr_node, expr_ast);
}
if ((CG(active_op_array)->fn_flags & ZEND_ACC_HAS_FINALLY_BLOCK)
&& (expr_node.op_type == IS_CV || (by_ref && expr_node.op_type == IS_VAR))
&& zend_has_finally()) {
/* Copy return value into temporary VAR to avoid modification in finally code */
if (by_ref) {
zend_emit_op(&expr_node, ZEND_MAKE_REF, &expr_node, NULL);
} else {
zend_emit_op_tmp(&expr_node, ZEND_QM_ASSIGN, &expr_node, NULL);
}
}
/* Generator return types are handled separately */
if (!is_generator && CG(active_op_array)->fn_flags & ZEND_ACC_HAS_RETURN_TYPE) {
zend_emit_return_type_check(
expr_ast ? &expr_node : NULL, CG(active_op_array)->arg_info - 1, 0);
}
zend_handle_loops_and_finally((expr_node.op_type & (IS_TMP_VAR | IS_VAR)) ? &expr_node : NULL);
opline = zend_emit_op(NULL, by_ref ? ZEND_RETURN_BY_REF : ZEND_RETURN,
&expr_node, NULL);
if (by_ref && expr_ast) {
if (zend_is_call(expr_ast)) {
opline->extended_value = ZEND_RETURNS_FUNCTION;
} else if (!zend_is_variable(expr_ast)) {
opline->extended_value = ZEND_RETURNS_VALUE;
}
}
}
/* }}} */
void zend_compile_echo(zend_ast *ast) /* {{{ */
{
zend_op *opline;
zend_ast *expr_ast = ast->child[0];
znode expr_node;
zend_compile_expr(&expr_node, expr_ast);
opline = zend_emit_op(NULL, ZEND_ECHO, &expr_node, NULL);
opline->extended_value = 0;
}
/* }}} */
void zend_compile_throw(zend_ast *ast) /* {{{ */
{
zend_ast *expr_ast = ast->child[0];
znode expr_node;
zend_compile_expr(&expr_node, expr_ast);
zend_emit_op(NULL, ZEND_THROW, &expr_node, NULL);
}
/* }}} */
void zend_compile_break_continue(zend_ast *ast) /* {{{ */
{
zend_ast *depth_ast = ast->child[0];
zend_op *opline;
zend_long depth;
ZEND_ASSERT(ast->kind == ZEND_AST_BREAK || ast->kind == ZEND_AST_CONTINUE);
if (depth_ast) {
zval *depth_zv;
if (depth_ast->kind != ZEND_AST_ZVAL) {
zend_error_noreturn(E_COMPILE_ERROR, "'%s' operator with non-integer operand "
"is no longer supported", ast->kind == ZEND_AST_BREAK ? "break" : "continue");
}
depth_zv = zend_ast_get_zval(depth_ast);
if (Z_TYPE_P(depth_zv) != IS_LONG || Z_LVAL_P(depth_zv) < 1) {
zend_error_noreturn(E_COMPILE_ERROR, "'%s' operator accepts only positive integers",
ast->kind == ZEND_AST_BREAK ? "break" : "continue");
}
depth = Z_LVAL_P(depth_zv);
} else {
depth = 1;
}
if (CG(context).current_brk_cont == -1) {
zend_error_noreturn(E_COMPILE_ERROR, "'%s' not in the 'loop' or 'switch' context",
ast->kind == ZEND_AST_BREAK ? "break" : "continue");
} else {
if (!zend_handle_loops_and_finally_ex(depth, NULL)) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot '%s' " ZEND_LONG_FMT " level%s",
ast->kind == ZEND_AST_BREAK ? "break" : "continue",
depth, depth == 1 ? "" : "s");
}
}
if (ast->kind == ZEND_AST_CONTINUE) {
int d, cur = CG(context).current_brk_cont;
for (d = depth - 1; d > 0; d--) {
cur = CG(context).brk_cont_array[cur].parent;
ZEND_ASSERT(cur != -1);
}
if (CG(context).brk_cont_array[cur].is_switch) {
if (depth == 1) {
zend_error(E_WARNING,
"\"continue\" targeting switch is equivalent to \"break\". " \
"Did you mean to use \"continue " ZEND_LONG_FMT "\"?",
depth + 1);
} else {
zend_error(E_WARNING,
"\"continue " ZEND_LONG_FMT "\" targeting switch is equivalent to \"break " ZEND_LONG_FMT "\". " \
"Did you mean to use \"continue " ZEND_LONG_FMT "\"?",
depth, depth, depth + 1);
}
}
}
opline = zend_emit_op(NULL, ast->kind == ZEND_AST_BREAK ? ZEND_BRK : ZEND_CONT, NULL, NULL);
opline->op1.num = CG(context).current_brk_cont;
opline->op2.num = depth;
}
/* }}} */
void zend_resolve_goto_label(zend_op_array *op_array, zend_op *opline) /* {{{ */
{
zend_label *dest;
int current, remove_oplines = opline->op1.num;
zval *label;
uint32_t opnum = opline - op_array->opcodes;
label = CT_CONSTANT_EX(op_array, opline->op2.constant);
if (CG(context).labels == NULL ||
(dest = zend_hash_find_ptr(CG(context).labels, Z_STR_P(label))) == NULL
) {
CG(in_compilation) = 1;
CG(active_op_array) = op_array;
CG(zend_lineno) = opline->lineno;
zend_error_noreturn(E_COMPILE_ERROR, "'goto' to undefined label '%s'", Z_STRVAL_P(label));
}
zval_ptr_dtor_str(label);
ZVAL_NULL(label);
current = opline->extended_value;
for (; current != dest->brk_cont; current = CG(context).brk_cont_array[current].parent) {
if (current == -1) {
CG(in_compilation) = 1;
CG(active_op_array) = op_array;
CG(zend_lineno) = opline->lineno;
zend_error_noreturn(E_COMPILE_ERROR, "'goto' into loop or switch statement is disallowed");
}
if (CG(context).brk_cont_array[current].start >= 0) {
remove_oplines--;
}
}
for (current = 0; current < op_array->last_try_catch; ++current) {
zend_try_catch_element *elem = &op_array->try_catch_array[current];
if (elem->try_op > opnum) {
break;
}
if (elem->finally_op && opnum < elem->finally_op - 1
&& (dest->opline_num > elem->finally_end || dest->opline_num < elem->try_op)
) {
remove_oplines--;
}
}
opline->opcode = ZEND_JMP;
opline->op1.opline_num = dest->opline_num;
opline->extended_value = 0;
SET_UNUSED(opline->op1);
SET_UNUSED(opline->op2);
SET_UNUSED(opline->result);
ZEND_ASSERT(remove_oplines >= 0);
while (remove_oplines--) {
opline--;
MAKE_NOP(opline);
ZEND_VM_SET_OPCODE_HANDLER(opline);
}
}
/* }}} */
void zend_compile_goto(zend_ast *ast) /* {{{ */
{
zend_ast *label_ast = ast->child[0];
znode label_node;
zend_op *opline;
uint32_t opnum_start = get_next_op_number();
zend_compile_expr(&label_node, label_ast);
/* Label resolution and unwinding adjustments happen in pass two. */
zend_handle_loops_and_finally(NULL);
opline = zend_emit_op(NULL, ZEND_GOTO, NULL, &label_node);
opline->op1.num = get_next_op_number() - opnum_start - 1;
opline->extended_value = CG(context).current_brk_cont;
}
/* }}} */
void zend_compile_label(zend_ast *ast) /* {{{ */
{
zend_string *label = zend_ast_get_str(ast->child[0]);
zend_label dest;
if (!CG(context).labels) {
ALLOC_HASHTABLE(CG(context).labels);
zend_hash_init(CG(context).labels, 8, NULL, label_ptr_dtor, 0);
}
dest.brk_cont = CG(context).current_brk_cont;
dest.opline_num = get_next_op_number();
if (!zend_hash_add_mem(CG(context).labels, label, &dest, sizeof(zend_label))) {
zend_error_noreturn(E_COMPILE_ERROR, "Label '%s' already defined", ZSTR_VAL(label));
}
}
/* }}} */
void zend_compile_while(zend_ast *ast) /* {{{ */
{
zend_ast *cond_ast = ast->child[0];
zend_ast *stmt_ast = ast->child[1];
znode cond_node;
uint32_t opnum_start, opnum_jmp, opnum_cond;
opnum_jmp = zend_emit_jump(0);
zend_begin_loop(ZEND_NOP, NULL, 0);
opnum_start = get_next_op_number();
zend_compile_stmt(stmt_ast);
opnum_cond = get_next_op_number();
zend_update_jump_target(opnum_jmp, opnum_cond);
zend_compile_expr(&cond_node, cond_ast);
zend_emit_cond_jump(ZEND_JMPNZ, &cond_node, opnum_start);
zend_end_loop(opnum_cond, NULL);
}
/* }}} */
void zend_compile_do_while(zend_ast *ast) /* {{{ */
{
zend_ast *stmt_ast = ast->child[0];
zend_ast *cond_ast = ast->child[1];
znode cond_node;
uint32_t opnum_start, opnum_cond;
zend_begin_loop(ZEND_NOP, NULL, 0);
opnum_start = get_next_op_number();
zend_compile_stmt(stmt_ast);
opnum_cond = get_next_op_number();
zend_compile_expr(&cond_node, cond_ast);
zend_emit_cond_jump(ZEND_JMPNZ, &cond_node, opnum_start);
zend_end_loop(opnum_cond, NULL);
}
/* }}} */
void zend_compile_expr_list(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast_list *list;
uint32_t i;
result->op_type = IS_CONST;
ZVAL_TRUE(&result->u.constant);
if (!ast) {
return;
}
list = zend_ast_get_list(ast);
for (i = 0; i < list->children; ++i) {
zend_ast *expr_ast = list->child[i];
zend_do_free(result);
zend_compile_expr(result, expr_ast);
}
}
/* }}} */
void zend_compile_for(zend_ast *ast) /* {{{ */
{
zend_ast *init_ast = ast->child[0];
zend_ast *cond_ast = ast->child[1];
zend_ast *loop_ast = ast->child[2];
zend_ast *stmt_ast = ast->child[3];
znode result;
uint32_t opnum_start, opnum_jmp, opnum_loop;
zend_compile_expr_list(&result, init_ast);
zend_do_free(&result);
opnum_jmp = zend_emit_jump(0);
zend_begin_loop(ZEND_NOP, NULL, 0);
opnum_start = get_next_op_number();
zend_compile_stmt(stmt_ast);
opnum_loop = get_next_op_number();
zend_compile_expr_list(&result, loop_ast);
zend_do_free(&result);
zend_update_jump_target_to_next(opnum_jmp);
zend_compile_expr_list(&result, cond_ast);
zend_do_extended_stmt();
zend_emit_cond_jump(ZEND_JMPNZ, &result, opnum_start);
zend_end_loop(opnum_loop, NULL);
}
/* }}} */
void zend_compile_foreach(zend_ast *ast) /* {{{ */
{
zend_ast *expr_ast = ast->child[0];
zend_ast *value_ast = ast->child[1];
zend_ast *key_ast = ast->child[2];
zend_ast *stmt_ast = ast->child[3];
zend_bool by_ref = value_ast->kind == ZEND_AST_REF;
zend_bool is_variable = zend_is_variable(expr_ast) && zend_can_write_to_variable(expr_ast);
znode expr_node, reset_node, value_node, key_node;
zend_op *opline;
uint32_t opnum_reset, opnum_fetch;
if (key_ast) {
if (key_ast->kind == ZEND_AST_REF) {
zend_error_noreturn(E_COMPILE_ERROR, "Key element cannot be a reference");
}
if (key_ast->kind == ZEND_AST_ARRAY) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot use list as key element");
}
}
if (by_ref) {
value_ast = value_ast->child[0];
}
if (value_ast->kind == ZEND_AST_ARRAY && zend_propagate_list_refs(value_ast)) {
by_ref = 1;
}
if (by_ref && is_variable) {
zend_compile_var(&expr_node, expr_ast, BP_VAR_W, 1);
} else {
zend_compile_expr(&expr_node, expr_ast);
}
if (by_ref) {
zend_separate_if_call_and_write(&expr_node, expr_ast, BP_VAR_W);
}
opnum_reset = get_next_op_number();
opline = zend_emit_op(&reset_node, by_ref ? ZEND_FE_RESET_RW : ZEND_FE_RESET_R, &expr_node, NULL);
zend_begin_loop(ZEND_FE_FREE, &reset_node, 0);
opnum_fetch = get_next_op_number();
opline = zend_emit_op(NULL, by_ref ? ZEND_FE_FETCH_RW : ZEND_FE_FETCH_R, &reset_node, NULL);
if (is_this_fetch(value_ast)) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot re-assign $this");
} else if (value_ast->kind == ZEND_AST_VAR &&
zend_try_compile_cv(&value_node, value_ast) == SUCCESS) {
SET_NODE(opline->op2, &value_node);
} else {
opline->op2_type = IS_VAR;
opline->op2.var = get_temporary_variable();
GET_NODE(&value_node, opline->op2);
if (value_ast->kind == ZEND_AST_ARRAY) {
zend_compile_list_assign(NULL, value_ast, &value_node, value_ast->attr);
} else if (by_ref) {
zend_emit_assign_ref_znode(value_ast, &value_node);
} else {
zend_emit_assign_znode(value_ast, &value_node);
}
}
if (key_ast) {
opline = &CG(active_op_array)->opcodes[opnum_fetch];
zend_make_tmp_result(&key_node, opline);
zend_emit_assign_znode(key_ast, &key_node);
}
zend_compile_stmt(stmt_ast);
/* Place JMP and FE_FREE on the line where foreach starts. It would be
* better to use the end line, but this information is not available
* currently. */
CG(zend_lineno) = ast->lineno;
zend_emit_jump(opnum_fetch);
opline = &CG(active_op_array)->opcodes[opnum_reset];
opline->op2.opline_num = get_next_op_number();
opline = &CG(active_op_array)->opcodes[opnum_fetch];
opline->extended_value = get_next_op_number();
zend_end_loop(opnum_fetch, &reset_node);
opline = zend_emit_op(NULL, ZEND_FE_FREE, &reset_node, NULL);
}
/* }}} */
void zend_compile_if(zend_ast *ast) /* {{{ */
{
zend_ast_list *list = zend_ast_get_list(ast);
uint32_t i;
uint32_t *jmp_opnums = NULL;
if (list->children > 1) {
jmp_opnums = safe_emalloc(sizeof(uint32_t), list->children - 1, 0);
}
for (i = 0; i < list->children; ++i) {
zend_ast *elem_ast = list->child[i];
zend_ast *cond_ast = elem_ast->child[0];
zend_ast *stmt_ast = elem_ast->child[1];
if (cond_ast) {
znode cond_node;
uint32_t opnum_jmpz;
zend_compile_expr(&cond_node, cond_ast);
opnum_jmpz = zend_emit_cond_jump(ZEND_JMPZ, &cond_node, 0);
zend_compile_stmt(stmt_ast);
if (i != list->children - 1) {
jmp_opnums[i] = zend_emit_jump(0);
}
zend_update_jump_target_to_next(opnum_jmpz);
} else {
/* "else" can only occur as last element. */
ZEND_ASSERT(i == list->children - 1);
zend_compile_stmt(stmt_ast);
}
}
if (list->children > 1) {
for (i = 0; i < list->children - 1; ++i) {
zend_update_jump_target_to_next(jmp_opnums[i]);
}
efree(jmp_opnums);
}
}
/* }}} */
static zend_uchar determine_switch_jumptable_type(zend_ast_list *cases) {
uint32_t i;
zend_uchar common_type = IS_UNDEF;
for (i = 0; i < cases->children; i++) {
zend_ast *case_ast = cases->child[i];
zend_ast **cond_ast = &case_ast->child[0];
zval *cond_zv;
if (!case_ast->child[0]) {
/* Skip default clause */
continue;
}
zend_eval_const_expr(cond_ast);
if ((*cond_ast)->kind != ZEND_AST_ZVAL) {
/* Non-constant case */
return IS_UNDEF;
}
cond_zv = zend_ast_get_zval(case_ast->child[0]);
if (Z_TYPE_P(cond_zv) != IS_LONG && Z_TYPE_P(cond_zv) != IS_STRING) {
/* We only optimize switched on integers and strings */
return IS_UNDEF;
}
if (common_type == IS_UNDEF) {
common_type = Z_TYPE_P(cond_zv);
} else if (common_type != Z_TYPE_P(cond_zv)) {
/* Non-uniform case types */
return IS_UNDEF;
}
if (Z_TYPE_P(cond_zv) == IS_STRING
&& is_numeric_string(Z_STRVAL_P(cond_zv), Z_STRLEN_P(cond_zv), NULL, NULL, 0)) {
/* Numeric strings cannot be compared with a simple hash lookup */
return IS_UNDEF;
}
}
return common_type;
}
static zend_bool should_use_jumptable(zend_ast_list *cases, zend_uchar jumptable_type) {
if (CG(compiler_options) & ZEND_COMPILE_NO_JUMPTABLES) {
return 0;
}
/* Thresholds are chosen based on when the average switch time for equidistributed
* input becomes smaller when using the jumptable optimization. */
if (jumptable_type == IS_LONG) {
return cases->children >= 5;
} else {
ZEND_ASSERT(jumptable_type == IS_STRING);
return cases->children >= 2;
}
}
void zend_compile_switch(zend_ast *ast) /* {{{ */
{
zend_ast *expr_ast = ast->child[0];
zend_ast_list *cases = zend_ast_get_list(ast->child[1]);
uint32_t i;
zend_bool has_default_case = 0;
znode expr_node, case_node;
zend_op *opline;
uint32_t *jmpnz_opnums, opnum_default_jmp, opnum_switch = (uint32_t)-1;
zend_uchar jumptable_type;
HashTable *jumptable = NULL;
zend_compile_expr(&expr_node, expr_ast);
zend_begin_loop(ZEND_FREE, &expr_node, 1);
case_node.op_type = IS_TMP_VAR;
case_node.u.op.var = get_temporary_variable();
jumptable_type = determine_switch_jumptable_type(cases);
if (jumptable_type != IS_UNDEF && should_use_jumptable(cases, jumptable_type)) {
znode jumptable_op;
ALLOC_HASHTABLE(jumptable);
zend_hash_init(jumptable, cases->children, NULL, NULL, 0);
jumptable_op.op_type = IS_CONST;
ZVAL_ARR(&jumptable_op.u.constant, jumptable);
opline = zend_emit_op(NULL,
jumptable_type == IS_LONG ? ZEND_SWITCH_LONG : ZEND_SWITCH_STRING,
&expr_node, &jumptable_op);
if (opline->op1_type == IS_CONST) {
Z_TRY_ADDREF_P(CT_CONSTANT(opline->op1));
}
opnum_switch = opline - CG(active_op_array)->opcodes;
}
jmpnz_opnums = safe_emalloc(sizeof(uint32_t), cases->children, 0);
for (i = 0; i < cases->children; ++i) {
zend_ast *case_ast = cases->child[i];
zend_ast *cond_ast = case_ast->child[0];
znode cond_node;
if (!cond_ast) {
if (has_default_case) {
CG(zend_lineno) = case_ast->lineno;
zend_error_noreturn(E_COMPILE_ERROR,
"Switch statements may only contain one default clause");
}
has_default_case = 1;
continue;
}
zend_compile_expr(&cond_node, cond_ast);
if (expr_node.op_type == IS_CONST
&& Z_TYPE(expr_node.u.constant) == IS_FALSE) {
jmpnz_opnums[i] = zend_emit_cond_jump(ZEND_JMPZ, &cond_node, 0);
} else if (expr_node.op_type == IS_CONST
&& Z_TYPE(expr_node.u.constant) == IS_TRUE) {
jmpnz_opnums[i] = zend_emit_cond_jump(ZEND_JMPNZ, &cond_node, 0);
} else {
opline = zend_emit_op(NULL,
(expr_node.op_type & (IS_VAR|IS_TMP_VAR)) ? ZEND_CASE : ZEND_IS_EQUAL,
&expr_node, &cond_node);
SET_NODE(opline->result, &case_node);
if (opline->op1_type == IS_CONST) {
Z_TRY_ADDREF_P(CT_CONSTANT(opline->op1));
}
jmpnz_opnums[i] = zend_emit_cond_jump(ZEND_JMPNZ, &case_node, 0);
}
}
opnum_default_jmp = zend_emit_jump(0);
for (i = 0; i < cases->children; ++i) {
zend_ast *case_ast = cases->child[i];
zend_ast *cond_ast = case_ast->child[0];
zend_ast *stmt_ast = case_ast->child[1];
if (cond_ast) {
zend_update_jump_target_to_next(jmpnz_opnums[i]);
if (jumptable) {
zval *cond_zv = zend_ast_get_zval(cond_ast);
zval jmp_target;
ZVAL_LONG(&jmp_target, get_next_op_number());
ZEND_ASSERT(Z_TYPE_P(cond_zv) == jumptable_type);
if (Z_TYPE_P(cond_zv) == IS_LONG) {
zend_hash_index_add(jumptable, Z_LVAL_P(cond_zv), &jmp_target);
} else {
ZEND_ASSERT(Z_TYPE_P(cond_zv) == IS_STRING);
zend_hash_add(jumptable, Z_STR_P(cond_zv), &jmp_target);
}
}
} else {
zend_update_jump_target_to_next(opnum_default_jmp);
if (jumptable) {
ZEND_ASSERT(opnum_switch != (uint32_t)-1);
opline = &CG(active_op_array)->opcodes[opnum_switch];
opline->extended_value = get_next_op_number();
}
}
zend_compile_stmt(stmt_ast);
}
if (!has_default_case) {
zend_update_jump_target_to_next(opnum_default_jmp);
if (jumptable) {
opline = &CG(active_op_array)->opcodes[opnum_switch];
opline->extended_value = get_next_op_number();
}
}
zend_end_loop(get_next_op_number(), &expr_node);
if (expr_node.op_type & (IS_VAR|IS_TMP_VAR)) {
opline = zend_emit_op(NULL, ZEND_FREE, &expr_node, NULL);
opline->extended_value = ZEND_FREE_SWITCH;
} else if (expr_node.op_type == IS_CONST) {
zval_ptr_dtor_nogc(&expr_node.u.constant);
}
efree(jmpnz_opnums);
}
/* }}} */
void zend_compile_try(zend_ast *ast) /* {{{ */
{
zend_ast *try_ast = ast->child[0];
zend_ast_list *catches = zend_ast_get_list(ast->child[1]);
zend_ast *finally_ast = ast->child[2];
uint32_t i, j;
zend_op *opline;
uint32_t try_catch_offset;
uint32_t *jmp_opnums = safe_emalloc(sizeof(uint32_t), catches->children, 0);
uint32_t orig_fast_call_var = CG(context).fast_call_var;
uint32_t orig_try_catch_offset = CG(context).try_catch_offset;
if (catches->children == 0 && !finally_ast) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot use try without catch or finally");
}
/* label: try { } must not be equal to try { label: } */
if (CG(context).labels) {
zend_label *label;
ZEND_HASH_REVERSE_FOREACH_PTR(CG(context).labels, label) {
if (label->opline_num == get_next_op_number()) {
zend_emit_op(NULL, ZEND_NOP, NULL, NULL);
}
break;
} ZEND_HASH_FOREACH_END();
}
try_catch_offset = zend_add_try_element(get_next_op_number());
if (finally_ast) {
zend_loop_var fast_call;
if (!(CG(active_op_array)->fn_flags & ZEND_ACC_HAS_FINALLY_BLOCK)) {
CG(active_op_array)->fn_flags |= ZEND_ACC_HAS_FINALLY_BLOCK;
}
CG(context).fast_call_var = get_temporary_variable();
/* Push FAST_CALL on unwind stack */
fast_call.opcode = ZEND_FAST_CALL;
fast_call.var_type = IS_TMP_VAR;
fast_call.var_num = CG(context).fast_call_var;
fast_call.try_catch_offset = try_catch_offset;
zend_stack_push(&CG(loop_var_stack), &fast_call);
}
CG(context).try_catch_offset = try_catch_offset;
zend_compile_stmt(try_ast);
if (catches->children != 0) {
jmp_opnums[0] = zend_emit_jump(0);
}
for (i = 0; i < catches->children; ++i) {
zend_ast *catch_ast = catches->child[i];
zend_ast_list *classes = zend_ast_get_list(catch_ast->child[0]);
zend_ast *var_ast = catch_ast->child[1];
zend_ast *stmt_ast = catch_ast->child[2];
zend_string *var_name = zval_make_interned_string(zend_ast_get_zval(var_ast));
zend_bool is_last_catch = (i + 1 == catches->children);
uint32_t *jmp_multicatch = safe_emalloc(sizeof(uint32_t), classes->children - 1, 0);
uint32_t opnum_catch = (uint32_t)-1;
CG(zend_lineno) = catch_ast->lineno;
for (j = 0; j < classes->children; j++) {
zend_ast *class_ast = classes->child[j];
zend_bool is_last_class = (j + 1 == classes->children);
if (!zend_is_const_default_class_ref(class_ast)) {
zend_error_noreturn(E_COMPILE_ERROR, "Bad class name in the catch statement");
}
opnum_catch = get_next_op_number();
if (i == 0 && j == 0) {
CG(active_op_array)->try_catch_array[try_catch_offset].catch_op = opnum_catch;
}
opline = get_next_op();
opline->opcode = ZEND_CATCH;
opline->op1_type = IS_CONST;
opline->op1.constant = zend_add_class_name_literal(
zend_resolve_class_name_ast(class_ast));
opline->extended_value = zend_alloc_cache_slot();
if (zend_string_equals_literal(var_name, "this")) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot re-assign $this");
}
opline->result_type = IS_CV;
opline->result.var = lookup_cv(var_name);
if (is_last_catch && is_last_class) {
opline->extended_value |= ZEND_LAST_CATCH;
}
if (!is_last_class) {
jmp_multicatch[j] = zend_emit_jump(0);
opline = &CG(active_op_array)->opcodes[opnum_catch];
opline->op2.opline_num = get_next_op_number();
}
}
for (j = 0; j < classes->children - 1; j++) {
zend_update_jump_target_to_next(jmp_multicatch[j]);
}
efree(jmp_multicatch);
zend_compile_stmt(stmt_ast);
if (!is_last_catch) {
jmp_opnums[i + 1] = zend_emit_jump(0);
}
ZEND_ASSERT(opnum_catch != (uint32_t)-1 && "Should have at least one class");
opline = &CG(active_op_array)->opcodes[opnum_catch];
if (!is_last_catch) {
opline->op2.opline_num = get_next_op_number();
}
}
for (i = 0; i < catches->children; ++i) {
zend_update_jump_target_to_next(jmp_opnums[i]);
}
if (finally_ast) {
zend_loop_var discard_exception;
uint32_t opnum_jmp = get_next_op_number() + 1;
/* Pop FAST_CALL from unwind stack */
zend_stack_del_top(&CG(loop_var_stack));
/* Push DISCARD_EXCEPTION on unwind stack */
discard_exception.opcode = ZEND_DISCARD_EXCEPTION;
discard_exception.var_type = IS_TMP_VAR;
discard_exception.var_num = CG(context).fast_call_var;
zend_stack_push(&CG(loop_var_stack), &discard_exception);
CG(zend_lineno) = finally_ast->lineno;
opline = zend_emit_op(NULL, ZEND_FAST_CALL, NULL, NULL);
opline->op1.num = try_catch_offset;
opline->result_type = IS_TMP_VAR;
opline->result.var = CG(context).fast_call_var;
zend_emit_op(NULL, ZEND_JMP, NULL, NULL);
zend_compile_stmt(finally_ast);
CG(active_op_array)->try_catch_array[try_catch_offset].finally_op = opnum_jmp + 1;
CG(active_op_array)->try_catch_array[try_catch_offset].finally_end
= get_next_op_number();
opline = zend_emit_op(NULL, ZEND_FAST_RET, NULL, NULL);
opline->op1_type = IS_TMP_VAR;
opline->op1.var = CG(context).fast_call_var;
opline->op2.num = orig_try_catch_offset;
zend_update_jump_target_to_next(opnum_jmp);
CG(context).fast_call_var = orig_fast_call_var;
/* Pop DISCARD_EXCEPTION from unwind stack */
zend_stack_del_top(&CG(loop_var_stack));
}
CG(context).try_catch_offset = orig_try_catch_offset;
efree(jmp_opnums);
}
/* }}} */
/* Encoding declarations must already be handled during parsing */
zend_bool zend_handle_encoding_declaration(zend_ast *ast) /* {{{ */
{
zend_ast_list *declares = zend_ast_get_list(ast);
uint32_t i;
for (i = 0; i < declares->children; ++i) {
zend_ast *declare_ast = declares->child[i];
zend_ast *name_ast = declare_ast->child[0];
zend_ast *value_ast = declare_ast->child[1];
zend_string *name = zend_ast_get_str(name_ast);
if (zend_string_equals_literal_ci(name, "encoding")) {
if (value_ast->kind != ZEND_AST_ZVAL) {
zend_throw_exception(zend_ce_compile_error, "Encoding must be a literal", 0);
return 0;
}
if (CG(multibyte)) {
zend_string *encoding_name = zval_get_string(zend_ast_get_zval(value_ast));
const zend_encoding *new_encoding, *old_encoding;
zend_encoding_filter old_input_filter;
CG(encoding_declared) = 1;
new_encoding = zend_multibyte_fetch_encoding(ZSTR_VAL(encoding_name));
if (!new_encoding) {
zend_error(E_COMPILE_WARNING, "Unsupported encoding [%s]", ZSTR_VAL(encoding_name));
} else {
old_input_filter = LANG_SCNG(input_filter);
old_encoding = LANG_SCNG(script_encoding);
zend_multibyte_set_filter(new_encoding);
/* need to re-scan if input filter changed */
if (old_input_filter != LANG_SCNG(input_filter) ||
(old_input_filter && new_encoding != old_encoding)) {
zend_multibyte_yyinput_again(old_input_filter, old_encoding);
}
}
zend_string_release_ex(encoding_name, 0);
} else {
zend_error(E_COMPILE_WARNING, "declare(encoding=...) ignored because "
"Zend multibyte feature is turned off by settings");
}
}
}
return 1;
}
/* }}} */
static int zend_declare_is_first_statement(zend_ast *ast) /* {{{ */
{
uint32_t i = 0;
zend_ast_list *file_ast = zend_ast_get_list(CG(ast));
/* Check to see if this declare is preceded only by declare statements */
while (i < file_ast->children) {
if (file_ast->child[i] == ast) {
return SUCCESS;
} else if (file_ast->child[i] == NULL) {
/* Empty statements are not allowed prior to a declare */
return FAILURE;
} else if (file_ast->child[i]->kind != ZEND_AST_DECLARE) {
/* declares can only be preceded by other declares */
return FAILURE;
}
i++;
}
return FAILURE;
}
/* }}} */
void zend_compile_declare(zend_ast *ast) /* {{{ */
{
zend_ast_list *declares = zend_ast_get_list(ast->child[0]);
zend_ast *stmt_ast = ast->child[1];
zend_declarables orig_declarables = FC(declarables);
uint32_t i;
for (i = 0; i < declares->children; ++i) {
zend_ast *declare_ast = declares->child[i];
zend_ast *name_ast = declare_ast->child[0];
zend_ast *value_ast = declare_ast->child[1];
zend_string *name = zend_ast_get_str(name_ast);
if (value_ast->kind != ZEND_AST_ZVAL) {
zend_error_noreturn(E_COMPILE_ERROR, "declare(%s) value must be a literal", ZSTR_VAL(name));
}
if (zend_string_equals_literal_ci(name, "ticks")) {
zval value_zv;
zend_const_expr_to_zval(&value_zv, value_ast);
FC(declarables).ticks = zval_get_long(&value_zv);
zval_ptr_dtor_nogc(&value_zv);
} else if (zend_string_equals_literal_ci(name, "encoding")) {
if (FAILURE == zend_declare_is_first_statement(ast)) {
zend_error_noreturn(E_COMPILE_ERROR, "Encoding declaration pragma must be "
"the very first statement in the script");
}
} else if (zend_string_equals_literal_ci(name, "strict_types")) {
zval value_zv;
if (FAILURE == zend_declare_is_first_statement(ast)) {
zend_error_noreturn(E_COMPILE_ERROR, "strict_types declaration must be "
"the very first statement in the script");
}
if (ast->child[1] != NULL) {
zend_error_noreturn(E_COMPILE_ERROR, "strict_types declaration must not "
"use block mode");
}
zend_const_expr_to_zval(&value_zv, value_ast);
if (Z_TYPE(value_zv) != IS_LONG || (Z_LVAL(value_zv) != 0 && Z_LVAL(value_zv) != 1)) {
zend_error_noreturn(E_COMPILE_ERROR, "strict_types declaration must have 0 or 1 as its value");
}
if (Z_LVAL(value_zv) == 1) {
CG(active_op_array)->fn_flags |= ZEND_ACC_STRICT_TYPES;
}
} else {
zend_error(E_COMPILE_WARNING, "Unsupported declare '%s'", ZSTR_VAL(name));
}
}
if (stmt_ast) {
zend_compile_stmt(stmt_ast);
FC(declarables) = orig_declarables;
}
}
/* }}} */
void zend_compile_stmt_list(zend_ast *ast) /* {{{ */
{
zend_ast_list *list = zend_ast_get_list(ast);
uint32_t i;
for (i = 0; i < list->children; ++i) {
zend_compile_stmt(list->child[i]);
}
}
/* }}} */
ZEND_API void zend_set_function_arg_flags(zend_function *func) /* {{{ */
{
uint32_t i, n;
func->common.arg_flags[0] = 0;
func->common.arg_flags[1] = 0;
func->common.arg_flags[2] = 0;
if (func->common.arg_info) {
n = MIN(func->common.num_args, MAX_ARG_FLAG_NUM);
i = 0;
while (i < n) {
ZEND_SET_ARG_FLAG(func, i + 1, ZEND_ARG_SEND_MODE(&func->common.arg_info[i]));
i++;
}
if (UNEXPECTED(func->common.fn_flags & ZEND_ACC_VARIADIC && ZEND_ARG_SEND_MODE(&func->common.arg_info[i]))) {
uint32_t pass_by_reference = ZEND_ARG_SEND_MODE(&func->common.arg_info[i]);
while (i < MAX_ARG_FLAG_NUM) {
ZEND_SET_ARG_FLAG(func, i + 1, pass_by_reference);
i++;
}
}
}
}
/* }}} */
static zend_type zend_compile_single_typename(zend_ast *ast)
{
ZEND_ASSERT(!(ast->attr & ZEND_TYPE_NULLABLE));
if (ast->kind == ZEND_AST_TYPE) {
return (zend_type) ZEND_TYPE_INIT_CODE(ast->attr, 0, 0);
} else {
zend_string *class_name = zend_ast_get_str(ast);
zend_uchar type_code = zend_lookup_builtin_type_by_name(class_name);
if (type_code != 0) {
if ((ast->attr & ZEND_NAME_NOT_FQ) != ZEND_NAME_NOT_FQ) {
zend_error_noreturn(E_COMPILE_ERROR,
"Type declaration '%s' must be unqualified",
ZSTR_VAL(zend_string_tolower(class_name)));
}
return (zend_type) ZEND_TYPE_INIT_CODE(type_code, 0, 0);
} else {
const char *correct_name;
zend_string *orig_name = zend_ast_get_str(ast);
uint32_t fetch_type = zend_get_class_fetch_type_ast(ast);
if (fetch_type == ZEND_FETCH_CLASS_DEFAULT) {
class_name = zend_resolve_class_name_ast(ast);
zend_assert_valid_class_name(class_name);
} else {
zend_ensure_valid_class_fetch_type(fetch_type);
zend_string_addref(class_name);
}
if (ast->attr == ZEND_NAME_NOT_FQ
&& zend_is_confusable_type(orig_name, &correct_name)
&& zend_is_not_imported(orig_name)) {
const char *extra =
FC(current_namespace) ? " or import the class with \"use\"" : "";
if (correct_name) {
zend_error(E_COMPILE_WARNING,
"\"%s\" will be interpreted as a class name. Did you mean \"%s\"? "
"Write \"\\%s\"%s to suppress this warning",
ZSTR_VAL(orig_name), correct_name, ZSTR_VAL(class_name), extra);
} else {
zend_error(E_COMPILE_WARNING,
"\"%s\" is not a supported builtin type "
"and will be interpreted as a class name. "
"Write \"\\%s\"%s to suppress this warning",
ZSTR_VAL(orig_name), ZSTR_VAL(class_name), extra);
}
}
return (zend_type) ZEND_TYPE_INIT_CLASS(class_name, 0, 0);
}
}
}
static zend_bool zend_type_contains_traversable(zend_type type) {
zend_type *single_type;
ZEND_TYPE_FOREACH(type, single_type) {
if (ZEND_TYPE_HAS_NAME(*single_type)
&& zend_string_equals_literal_ci(ZEND_TYPE_NAME(*single_type), "Traversable")) {
return 1;
}
} ZEND_TYPE_FOREACH_END();
return 0;
}
// TODO: Ideally we'd canonicalize "iterable" into "array|Traversable" and essentially
// treat it as a built-in type alias.
static zend_type zend_compile_typename(
zend_ast *ast, zend_bool force_allow_null, zend_bool use_arena) /* {{{ */
{
zend_bool allow_null = force_allow_null;
zend_ast_attr orig_ast_attr = ast->attr;
zend_type type = ZEND_TYPE_INIT_NONE(0);
if (ast->attr & ZEND_TYPE_NULLABLE) {
allow_null = 1;
ast->attr &= ~ZEND_TYPE_NULLABLE;
}
if (ast->kind == ZEND_AST_TYPE_UNION) {
zend_ast_list *list = zend_ast_get_list(ast);
for (uint32_t i = 0; i < list->children; i++) {
zend_ast *type_ast = list->child[i];
zend_type single_type = zend_compile_single_typename(type_ast);
uint32_t type_mask_overlap =
ZEND_TYPE_PURE_MASK(type) & ZEND_TYPE_PURE_MASK(single_type);
if (type_mask_overlap) {
zend_type overlap_type = ZEND_TYPE_INIT_MASK(type_mask_overlap);
zend_string *overlap_type_str = zend_type_to_string(overlap_type);
zend_error_noreturn(E_COMPILE_ERROR,
"Duplicate type %s is redundant", ZSTR_VAL(overlap_type_str));
}
ZEND_TYPE_FULL_MASK(type) |= ZEND_TYPE_PURE_MASK(single_type);
ZEND_TYPE_FULL_MASK(single_type) &= ~_ZEND_TYPE_MAY_BE_MASK;
if (ZEND_TYPE_HAS_CLASS(single_type)) {
if (!ZEND_TYPE_HAS_CLASS(type)) {
/* The first class type can be stored directly as the type ptr payload. */
ZEND_TYPE_SET_PTR(type, ZEND_TYPE_NAME(single_type));
ZEND_TYPE_FULL_MASK(type) |= _ZEND_TYPE_NAME_BIT;
} else {
zend_type_list *list;
if (ZEND_TYPE_HAS_LIST(type)) {
/* Add name to existing name list. */
zend_type_list *old_list = ZEND_TYPE_LIST(type);
if (use_arena) {
// TODO: Add a zend_arena_realloc API?
list = zend_arena_alloc(
&CG(arena), ZEND_TYPE_LIST_SIZE(old_list->num_types + 1));
memcpy(list, old_list, ZEND_TYPE_LIST_SIZE(old_list->num_types));
} else {
list = erealloc(old_list, ZEND_TYPE_LIST_SIZE(old_list->num_types + 1));
}
} else {
/* Switch from single name to name list. */
size_t size = ZEND_TYPE_LIST_SIZE(2);
list = use_arena ? zend_arena_alloc(&CG(arena), size) : emalloc(size);
list->num_types = 1;
list->types[0] = type;
ZEND_TYPE_FULL_MASK(list->types[0]) &= ~_ZEND_TYPE_MAY_BE_MASK;
}
list->types[list->num_types++] = single_type;
ZEND_TYPE_SET_LIST(type, list);
if (use_arena) {
ZEND_TYPE_FULL_MASK(type) |= _ZEND_TYPE_ARENA_BIT;
}
/* Check for trivially redundant class types */
for (size_t i = 0; i < list->num_types - 1; i++) {
if (zend_string_equals_ci(
ZEND_TYPE_NAME(list->types[i]), ZEND_TYPE_NAME(single_type))) {
zend_string *single_type_str = zend_type_to_string(single_type);
zend_error_noreturn(E_COMPILE_ERROR,
"Duplicate type %s is redundant", ZSTR_VAL(single_type_str));
}
}
}
}
}
} else {
type = zend_compile_single_typename(ast);
}
if (allow_null) {
ZEND_TYPE_FULL_MASK(type) |= MAY_BE_NULL;
}
uint32_t type_mask = ZEND_TYPE_PURE_MASK(type);
if ((type_mask & (MAY_BE_ARRAY|MAY_BE_ITERABLE)) == (MAY_BE_ARRAY|MAY_BE_ITERABLE)) {
zend_string *type_str = zend_type_to_string(type);
zend_error_noreturn(E_COMPILE_ERROR,
"Type %s contains both iterable and array, which is redundant", ZSTR_VAL(type_str));
}
if ((type_mask & MAY_BE_ITERABLE) && zend_type_contains_traversable(type)) {
zend_string *type_str = zend_type_to_string(type);
zend_error_noreturn(E_COMPILE_ERROR,
"Type %s contains both iterable and Traversable, which is redundant",
ZSTR_VAL(type_str));
}
if ((type_mask & MAY_BE_OBJECT) && ZEND_TYPE_HAS_CLASS(type)) {
zend_string *type_str = zend_type_to_string(type);
zend_error_noreturn(E_COMPILE_ERROR,
"Type %s contains both object and a class type, which is redundant",
ZSTR_VAL(type_str));
}
if ((type_mask & MAY_BE_VOID) && (ZEND_TYPE_HAS_CLASS(type) || type_mask != MAY_BE_VOID)) {
zend_error_noreturn(E_COMPILE_ERROR, "Void can only be used as a standalone type");
}
if ((type_mask & (MAY_BE_NULL|MAY_BE_FALSE))
&& !ZEND_TYPE_HAS_CLASS(type) && !(type_mask & ~(MAY_BE_NULL|MAY_BE_FALSE))) {
if (type_mask == MAY_BE_NULL) {
zend_error_noreturn(E_COMPILE_ERROR, "Null can not be used as a standalone type");
} else {
zend_error_noreturn(E_COMPILE_ERROR, "False can not be used as a standalone type");
}
}
ast->attr = orig_ast_attr;
return type;
}
/* }}} */
/* May convert value from int to float. */
static zend_bool zend_is_valid_default_value(zend_type type, zval *value)
{
ZEND_ASSERT(ZEND_TYPE_IS_SET(type));
if (ZEND_TYPE_CONTAINS_CODE(type, Z_TYPE_P(value))) {
return 1;
}
if ((ZEND_TYPE_FULL_MASK(type) & MAY_BE_DOUBLE) && Z_TYPE_P(value) == IS_LONG) {
/* Integers are allowed as initializers for floating-point values. */
convert_to_double(value);
return 1;
}
if ((ZEND_TYPE_FULL_MASK(type) & MAY_BE_ITERABLE) && Z_TYPE_P(value) == IS_ARRAY) {
return 1;
}
return 0;
}
void zend_compile_params(zend_ast *ast, zend_ast *return_type_ast) /* {{{ */
{
zend_ast_list *list = zend_ast_get_list(ast);
uint32_t i;
zend_op_array *op_array = CG(active_op_array);
zend_arg_info *arg_infos;
if (return_type_ast) {
/* Use op_array->arg_info[-1] for return type */
arg_infos = safe_emalloc(sizeof(zend_arg_info), list->children + 1, 0);
arg_infos->name = NULL;
arg_infos->type = zend_compile_typename(
return_type_ast, /* force_allow_null */ 0, /* use_arena */ 0);
ZEND_TYPE_FULL_MASK(arg_infos->type) |= _ZEND_ARG_INFO_FLAGS(
(op_array->fn_flags & ZEND_ACC_RETURN_REFERENCE) != 0, /* is_variadic */ 0);
arg_infos++;
op_array->fn_flags |= ZEND_ACC_HAS_RETURN_TYPE;
} else {
if (list->children == 0) {
return;
}
arg_infos = safe_emalloc(sizeof(zend_arg_info), list->children, 0);
}
for (i = 0; i < list->children; ++i) {
zend_ast *param_ast = list->child[i];
zend_ast *type_ast = param_ast->child[0];
zend_ast *var_ast = param_ast->child[1];
zend_ast *default_ast = param_ast->child[2];
zend_string *name = zval_make_interned_string(zend_ast_get_zval(var_ast));
zend_bool is_ref = (param_ast->attr & ZEND_PARAM_REF) != 0;
zend_bool is_variadic = (param_ast->attr & ZEND_PARAM_VARIADIC) != 0;
znode var_node, default_node;
zend_uchar opcode;
zend_op *opline;
zend_arg_info *arg_info;
if (zend_is_auto_global(name)) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot re-assign auto-global variable %s",
ZSTR_VAL(name));
}
var_node.op_type = IS_CV;
var_node.u.op.var = lookup_cv(name);
if (EX_VAR_TO_NUM(var_node.u.op.var) != i) {
zend_error_noreturn(E_COMPILE_ERROR, "Redefinition of parameter $%s",
ZSTR_VAL(name));
} else if (zend_string_equals_literal(name, "this")) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot use $this as parameter");
}
if (op_array->fn_flags & ZEND_ACC_VARIADIC) {
zend_error_noreturn(E_COMPILE_ERROR, "Only the last parameter can be variadic");
}
if (is_variadic) {
opcode = ZEND_RECV_VARIADIC;
default_node.op_type = IS_UNUSED;
op_array->fn_flags |= ZEND_ACC_VARIADIC;
if (default_ast) {
zend_error_noreturn(E_COMPILE_ERROR,
"Variadic parameter cannot have a default value");
}
} else if (default_ast) {
/* we cannot substitute constants here or it will break ReflectionParameter::getDefaultValueConstantName() and ReflectionParameter::isDefaultValueConstant() */
uint32_t cops = CG(compiler_options);
CG(compiler_options) |= ZEND_COMPILE_NO_CONSTANT_SUBSTITUTION | ZEND_COMPILE_NO_PERSISTENT_CONSTANT_SUBSTITUTION;
opcode = ZEND_RECV_INIT;
default_node.op_type = IS_CONST;
zend_const_expr_to_zval(&default_node.u.constant, default_ast);
CG(compiler_options) = cops;
} else {
opcode = ZEND_RECV;
default_node.op_type = IS_UNUSED;
op_array->required_num_args = i + 1;
}
arg_info = &arg_infos[i];
arg_info->name = zend_string_copy(name);
arg_info->type = (zend_type) ZEND_TYPE_INIT_NONE(0);
if (type_ast) {
uint32_t default_type = default_ast ? Z_TYPE(default_node.u.constant) : IS_UNDEF;
op_array->fn_flags |= ZEND_ACC_HAS_TYPE_HINTS;
arg_info->type = zend_compile_typename(
type_ast, default_type == IS_NULL, /* use_arena */ 0);
if (ZEND_TYPE_FULL_MASK(arg_info->type) & MAY_BE_VOID) {
zend_error_noreturn(E_COMPILE_ERROR, "void cannot be used as a parameter type");
}
if (default_type > IS_NULL && default_type != IS_CONSTANT_AST
&& !zend_is_valid_default_value(arg_info->type, &default_node.u.constant)) {
zend_string *type_str = zend_type_to_string(arg_info->type);
zend_error_noreturn(E_COMPILE_ERROR,
"Cannot use %s as default value for parameter $%s of type %s",
zend_get_type_by_const(default_type),
ZSTR_VAL(name), ZSTR_VAL(type_str));
}
}
opline = zend_emit_op(NULL, opcode, NULL, &default_node);
SET_NODE(opline->result, &var_node);
opline->op1.num = i + 1;
if (type_ast) {
/* Allocate cache slot to speed-up run-time class resolution */
opline->extended_value =
zend_alloc_cache_slots(zend_type_get_num_classes(arg_info->type));
}
ZEND_TYPE_FULL_MASK(arg_info->type) |= _ZEND_ARG_INFO_FLAGS(is_ref, is_variadic);
if (opcode == ZEND_RECV) {
opline->op2.num = type_ast ?
ZEND_TYPE_FULL_MASK(arg_info->type) : MAY_BE_ANY;
}
}
/* These are assigned at the end to avoid uninitialized memory in case of an error */
op_array->num_args = list->children;
op_array->arg_info = arg_infos;
/* Don't count the variadic argument */
if (op_array->fn_flags & ZEND_ACC_VARIADIC) {
op_array->num_args--;
}
zend_set_function_arg_flags((zend_function*)op_array);
}
/* }}} */
static void zend_compile_closure_binding(znode *closure, zend_op_array *op_array, zend_ast *uses_ast) /* {{{ */
{
zend_ast_list *list = zend_ast_get_list(uses_ast);
uint32_t i;
if (!list->children) {
return;
}
if (!op_array->static_variables) {
op_array->static_variables = zend_new_array(8);
}
for (i = 0; i < list->children; ++i) {
zend_ast *var_name_ast = list->child[i];
zend_string *var_name = zval_make_interned_string(zend_ast_get_zval(var_name_ast));
uint32_t mode = var_name_ast->attr;
zend_op *opline;
zval *value;
if (zend_string_equals_literal(var_name, "this")) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot use $this as lexical variable");
}
if (zend_is_auto_global(var_name)) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot use auto-global as lexical variable");
}
value = zend_hash_add(op_array->static_variables, var_name, &EG(uninitialized_zval));
if (!value) {
zend_error_noreturn(E_COMPILE_ERROR,
"Cannot use variable $%s twice", ZSTR_VAL(var_name));
}
CG(zend_lineno) = zend_ast_get_lineno(var_name_ast);
opline = zend_emit_op(NULL, ZEND_BIND_LEXICAL, closure, NULL);
opline->op2_type = IS_CV;
opline->op2.var = lookup_cv(var_name);
opline->extended_value =
(uint32_t)((char*)value - (char*)op_array->static_variables->arData) | mode;
}
}
/* }}} */
typedef struct {
HashTable uses;
zend_bool varvars_used;
} closure_info;
static void find_implicit_binds_recursively(closure_info *info, zend_ast *ast) {
if (!ast) {
return;
}
if (ast->kind == ZEND_AST_VAR) {
zend_ast *name_ast = ast->child[0];
if (name_ast->kind == ZEND_AST_ZVAL && Z_TYPE_P(zend_ast_get_zval(name_ast)) == IS_STRING) {
zend_string *name = zend_ast_get_str(name_ast);
if (zend_is_auto_global(name)) {
/* These is no need to explicitly import auto-globals. */
return;
}
if (zend_string_equals_literal(name, "this")) {
/* $this does not need to be explicitly imported. */
return;
}
zend_hash_add_empty_element(&info->uses, name);
} else {
info->varvars_used = 1;
find_implicit_binds_recursively(info, name_ast);
}
} else if (zend_ast_is_list(ast)) {
zend_ast_list *list = zend_ast_get_list(ast);
uint32_t i;
for (i = 0; i < list->children; i++) {
find_implicit_binds_recursively(info, list->child[i]);
}
} else if (ast->kind == ZEND_AST_CLOSURE) {
/* For normal closures add the use() list. */
zend_ast_decl *closure_ast = (zend_ast_decl *) ast;
zend_ast *uses_ast = closure_ast->child[1];
if (uses_ast) {
zend_ast_list *uses_list = zend_ast_get_list(uses_ast);
uint32_t i;
for (i = 0; i < uses_list->children; i++) {
zend_hash_add_empty_element(&info->uses, zend_ast_get_str(uses_list->child[i]));
}
}
} else if (ast->kind == ZEND_AST_ARROW_FUNC) {
/* For arrow functions recursively check the expression. */
zend_ast_decl *closure_ast = (zend_ast_decl *) ast;
find_implicit_binds_recursively(info, closure_ast->child[2]);
} else if (!zend_ast_is_special(ast)) {
uint32_t i, children = zend_ast_get_num_children(ast);
for (i = 0; i < children; i++) {
find_implicit_binds_recursively(info, ast->child[i]);
}
}
}
static void find_implicit_binds(closure_info *info, zend_ast *params_ast, zend_ast *stmt_ast)
{
zend_ast_list *param_list = zend_ast_get_list(params_ast);
uint32_t i;
zend_hash_init(&info->uses, param_list->children, NULL, NULL, 0);
find_implicit_binds_recursively(info, stmt_ast);
/* Remove variables that are parameters */
for (i = 0; i < param_list->children; i++) {
zend_ast *param_ast = param_list->child[i];
zend_hash_del(&info->uses, zend_ast_get_str(param_ast->child[1]));
}
}
static void compile_implicit_lexical_binds(
closure_info *info, znode *closure, zend_op_array *op_array)
{
zend_string *var_name;
zend_op *opline;
/* TODO We might want to use a special binding mode if varvars_used is set. */
if (zend_hash_num_elements(&info->uses) == 0) {
return;
}
if (!op_array->static_variables) {
op_array->static_variables = zend_new_array(8);
}
ZEND_HASH_FOREACH_STR_KEY(&info->uses, var_name)
zval *value = zend_hash_add(
op_array->static_variables, var_name, &EG(uninitialized_zval));
uint32_t offset = (uint32_t)((char*)value - (char*)op_array->static_variables->arData);
opline = zend_emit_op(NULL, ZEND_BIND_LEXICAL, closure, NULL);
opline->op2_type = IS_CV;
opline->op2.var = lookup_cv(var_name);
opline->extended_value = offset | ZEND_BIND_IMPLICIT;
ZEND_HASH_FOREACH_END();
}
static void zend_compile_closure_uses(zend_ast *ast) /* {{{ */
{
zend_op_array *op_array = CG(active_op_array);
zend_ast_list *list = zend_ast_get_list(ast);
uint32_t i;
for (i = 0; i < list->children; ++i) {
zend_ast *var_ast = list->child[i];
zend_string *var_name = zend_ast_get_str(var_ast);
zval zv;
ZVAL_NULL(&zv);
{
int i;
for (i = 0; i < op_array->last_var; i++) {
if (zend_string_equals(op_array->vars[i], var_name)) {
zend_error_noreturn(E_COMPILE_ERROR,
"Cannot use lexical variable $%s as a parameter name", ZSTR_VAL(var_name));
}
}
}
CG(zend_lineno) = zend_ast_get_lineno(var_ast);
zend_compile_static_var_common(var_name, &zv, var_ast->attr ? ZEND_BIND_REF : 0);
}
}
/* }}} */
static void zend_compile_implicit_closure_uses(closure_info *info)
{
zend_string *var_name;
ZEND_HASH_FOREACH_STR_KEY(&info->uses, var_name)
zval zv;
ZVAL_NULL(&zv);
zend_compile_static_var_common(var_name, &zv, ZEND_BIND_IMPLICIT);
ZEND_HASH_FOREACH_END();
}
static void zend_check_magic_method_attr(uint32_t attr, const char* method, zend_bool is_static) /* {{{ */
{
if (is_static) {
if (!(attr & ZEND_ACC_PUBLIC) || !(attr & ZEND_ACC_STATIC)) {
zend_error(E_WARNING, "The magic method %s() must have public visibility and be static", method);
}
} else if (!(attr & ZEND_ACC_PUBLIC) || (attr & ZEND_ACC_STATIC)) {
zend_error(E_WARNING,
"The magic method %s() must have public visibility and cannot be static",
method);
}
}
/* }}} */
void zend_begin_method_decl(zend_op_array *op_array, zend_string *name, zend_bool has_body) /* {{{ */
{
zend_class_entry *ce = CG(active_class_entry);
zend_bool in_interface = (ce->ce_flags & ZEND_ACC_INTERFACE) != 0;
uint32_t fn_flags = op_array->fn_flags;
zend_string *lcname;
if (in_interface) {
if (!(fn_flags & ZEND_ACC_PUBLIC) || (fn_flags & (ZEND_ACC_FINAL|ZEND_ACC_ABSTRACT))) {
zend_error_noreturn(E_COMPILE_ERROR, "Access type for interface method "
"%s::%s() must be omitted", ZSTR_VAL(ce->name), ZSTR_VAL(name));
}
op_array->fn_flags |= ZEND_ACC_ABSTRACT;
}
if (op_array->fn_flags & ZEND_ACC_ABSTRACT) {
if (op_array->fn_flags & ZEND_ACC_PRIVATE) {
zend_error_noreturn(E_COMPILE_ERROR, "%s function %s::%s() cannot be declared private",
in_interface ? "Interface" : "Abstract", ZSTR_VAL(ce->name), ZSTR_VAL(name));
}
if (has_body) {
zend_error_noreturn(E_COMPILE_ERROR, "%s function %s::%s() cannot contain body",
in_interface ? "Interface" : "Abstract", ZSTR_VAL(ce->name), ZSTR_VAL(name));
}
ce->ce_flags |= ZEND_ACC_IMPLICIT_ABSTRACT_CLASS;
} else if (!has_body) {
zend_error_noreturn(E_COMPILE_ERROR, "Non-abstract method %s::%s() must contain body",
ZSTR_VAL(ce->name), ZSTR_VAL(name));
}
op_array->scope = ce;
op_array->function_name = zend_string_copy(name);
lcname = zend_string_tolower(name);
lcname = zend_new_interned_string(lcname);
if (zend_hash_add_ptr(&ce->function_table, lcname, op_array) == NULL) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot redeclare %s::%s()",
ZSTR_VAL(ce->name), ZSTR_VAL(name));
}
if (zend_string_equals_literal(lcname, "serialize")) {
ce->serialize_func = (zend_function *) op_array;
} else if (zend_string_equals_literal(lcname, "unserialize")) {
ce->unserialize_func = (zend_function *) op_array;
} else if (ZSTR_VAL(lcname)[0] != '_' || ZSTR_VAL(lcname)[1] != '_') {
/* pass */
} else if (zend_string_equals_literal(lcname, ZEND_CONSTRUCTOR_FUNC_NAME)) {
ce->constructor = (zend_function *) op_array;
} else if (zend_string_equals_literal(lcname, ZEND_DESTRUCTOR_FUNC_NAME)) {
ce->destructor = (zend_function *) op_array;
} else if (zend_string_equals_literal(lcname, ZEND_CLONE_FUNC_NAME)) {
ce->clone = (zend_function *) op_array;
} else if (zend_string_equals_literal(lcname, ZEND_CALL_FUNC_NAME)) {
zend_check_magic_method_attr(fn_flags, "__call", 0);
ce->__call = (zend_function *) op_array;
} else if (zend_string_equals_literal(lcname, ZEND_CALLSTATIC_FUNC_NAME)) {
zend_check_magic_method_attr(fn_flags, "__callStatic", 1);
ce->__callstatic = (zend_function *) op_array;
} else if (zend_string_equals_literal(lcname, ZEND_GET_FUNC_NAME)) {
zend_check_magic_method_attr(fn_flags, "__get", 0);
ce->__get = (zend_function *) op_array;
ce->ce_flags |= ZEND_ACC_USE_GUARDS;
} else if (zend_string_equals_literal(lcname, ZEND_SET_FUNC_NAME)) {
zend_check_magic_method_attr(fn_flags, "__set", 0);
ce->__set = (zend_function *) op_array;
ce->ce_flags |= ZEND_ACC_USE_GUARDS;
} else if (zend_string_equals_literal(lcname, ZEND_UNSET_FUNC_NAME)) {
zend_check_magic_method_attr(fn_flags, "__unset", 0);
ce->__unset = (zend_function *) op_array;
ce->ce_flags |= ZEND_ACC_USE_GUARDS;
} else if (zend_string_equals_literal(lcname, ZEND_ISSET_FUNC_NAME)) {
zend_check_magic_method_attr(fn_flags, "__isset", 0);
ce->__isset = (zend_function *) op_array;
ce->ce_flags |= ZEND_ACC_USE_GUARDS;
} else if (zend_string_equals_literal(lcname, ZEND_TOSTRING_FUNC_NAME)) {
zend_check_magic_method_attr(fn_flags, "__toString", 0);
ce->__tostring = (zend_function *) op_array;
} else if (zend_string_equals_literal(lcname, ZEND_INVOKE_FUNC_NAME)) {
zend_check_magic_method_attr(fn_flags, "__invoke", 0);
} else if (zend_string_equals_literal(lcname, ZEND_DEBUGINFO_FUNC_NAME)) {
zend_check_magic_method_attr(fn_flags, "__debugInfo", 0);
ce->__debugInfo = (zend_function *) op_array;
}
zend_string_release_ex(lcname, 0);
}
/* }}} */
static void zend_begin_func_decl(znode *result, zend_op_array *op_array, zend_ast_decl *decl, zend_bool toplevel) /* {{{ */
{
zend_string *unqualified_name, *name, *lcname, *key;
zend_op *opline;
unqualified_name = decl->name;
op_array->function_name = name = zend_prefix_with_ns(unqualified_name);
lcname = zend_string_tolower(name);
if (FC(imports_function)) {
zend_string *import_name = zend_hash_find_ptr_lc(
FC(imports_function), ZSTR_VAL(unqualified_name), ZSTR_LEN(unqualified_name));
if (import_name && !zend_string_equals_ci(lcname, import_name)) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot declare function %s "
"because the name is already in use", ZSTR_VAL(name));
}
}
if (zend_string_equals_literal(lcname, "__autoload")) {
zend_error_noreturn(E_COMPILE_ERROR,
"__autoload() is no longer supported, use spl_autoload_register() instead");
}
if (zend_string_equals_literal_ci(unqualified_name, "assert")) {
zend_error(E_COMPILE_ERROR,
"Defining a custom assert() function is not allowed, "
"as the function has special semantics");
}
zend_register_seen_symbol(lcname, ZEND_SYMBOL_FUNCTION);
if (toplevel) {
if (UNEXPECTED(zend_hash_add_ptr(CG(function_table), lcname, op_array) == NULL)) {
do_bind_function_error(lcname, op_array, 1);
}
zend_string_release_ex(lcname, 0);
return;
}
key = zend_build_runtime_definition_key(lcname, decl->start_lineno);
if (!zend_hash_add_ptr(CG(function_table), key, op_array)) {
zend_error_noreturn(E_ERROR,
"Runtime definition key collision for function %s. This is a bug", ZSTR_VAL(name));
}
if (op_array->fn_flags & ZEND_ACC_CLOSURE) {
opline = zend_emit_op_tmp(result, ZEND_DECLARE_LAMBDA_FUNCTION, NULL, NULL);
opline->extended_value = zend_alloc_cache_slot();
opline->op1_type = IS_CONST;
LITERAL_STR(opline->op1, key);
} else {
opline = get_next_op();
opline->opcode = ZEND_DECLARE_FUNCTION;
opline->op1_type = IS_CONST;
LITERAL_STR(opline->op1, zend_string_copy(lcname));
/* RTD key is placed after lcname literal in op1 */
zend_add_literal_string(&key);
}
zend_string_release_ex(lcname, 0);
}
/* }}} */
void zend_compile_func_decl(znode *result, zend_ast *ast, zend_bool toplevel) /* {{{ */
{
zend_ast_decl *decl = (zend_ast_decl *) ast;
zend_ast *params_ast = decl->child[0];
zend_ast *uses_ast = decl->child[1];
zend_ast *stmt_ast = decl->child[2];
zend_ast *return_type_ast = decl->child[3];
zend_bool is_method = decl->kind == ZEND_AST_METHOD;
zend_class_entry *orig_class_entry = CG(active_class_entry);
zend_op_array *orig_op_array = CG(active_op_array);
zend_op_array *op_array = zend_arena_alloc(&CG(arena), sizeof(zend_op_array));
zend_oparray_context orig_oparray_context;
closure_info info;
memset(&info, 0, sizeof(closure_info));
init_op_array(op_array, ZEND_USER_FUNCTION, INITIAL_OP_ARRAY_SIZE);
if (CG(compiler_options) & ZEND_COMPILE_PRELOAD) {
op_array->fn_flags |= ZEND_ACC_PRELOADED;
ZEND_MAP_PTR_NEW(op_array->run_time_cache);
ZEND_MAP_PTR_NEW(op_array->static_variables_ptr);
} else {
ZEND_MAP_PTR_INIT(op_array->run_time_cache, zend_arena_alloc(&CG(arena), sizeof(void*)));
ZEND_MAP_PTR_SET(op_array->run_time_cache, NULL);
}
op_array->fn_flags |= (orig_op_array->fn_flags & ZEND_ACC_STRICT_TYPES);
op_array->fn_flags |= decl->flags;
op_array->line_start = decl->start_lineno;
op_array->line_end = decl->end_lineno;
if (decl->doc_comment) {
op_array->doc_comment = zend_string_copy(decl->doc_comment);
}
if (decl->kind == ZEND_AST_CLOSURE || decl->kind == ZEND_AST_ARROW_FUNC) {
op_array->fn_flags |= ZEND_ACC_CLOSURE;
}
if (is_method) {
zend_bool has_body = stmt_ast != NULL;
zend_begin_method_decl(op_array, decl->name, has_body);
} else {
zend_begin_func_decl(result, op_array, decl, toplevel);
if (decl->kind == ZEND_AST_ARROW_FUNC) {
find_implicit_binds(&info, params_ast, stmt_ast);
compile_implicit_lexical_binds(&info, result, op_array);
} else if (uses_ast) {
zend_compile_closure_binding(result, op_array, uses_ast);
}
}
CG(active_op_array) = op_array;
/* Do not leak the class scope into free standing functions, even if they are dynamically
* defined inside a class method. This is necessary for correct handling of magic constants.
* For example __CLASS__ should always be "" inside a free standing function. */
if (decl->kind == ZEND_AST_FUNC_DECL) {
CG(active_class_entry) = NULL;
}
if (toplevel) {
op_array->fn_flags |= ZEND_ACC_TOP_LEVEL;
}
zend_oparray_context_begin(&orig_oparray_context);
if (CG(compiler_options) & ZEND_COMPILE_EXTENDED_STMT) {
zend_op *opline_ext = zend_emit_op(NULL, ZEND_EXT_NOP, NULL, NULL);
opline_ext->lineno = decl->start_lineno;
}
{
/* Push a separator to the loop variable stack */
zend_loop_var dummy_var;
dummy_var.opcode = ZEND_RETURN;
zend_stack_push(&CG(loop_var_stack), (void *) &dummy_var);
}
zend_compile_params(params_ast, return_type_ast);
if (CG(active_op_array)->fn_flags & ZEND_ACC_GENERATOR) {
zend_mark_function_as_generator();
zend_emit_op(NULL, ZEND_GENERATOR_CREATE, NULL, NULL);
}
if (decl->kind == ZEND_AST_ARROW_FUNC) {
zend_compile_implicit_closure_uses(&info);
zend_hash_destroy(&info.uses);
} else if (uses_ast) {
zend_compile_closure_uses(uses_ast);
}
zend_compile_stmt(stmt_ast);
if (is_method) {
zend_check_magic_method_implementation(
CG(active_class_entry), (zend_function *) op_array, E_COMPILE_ERROR);
}
/* put the implicit return on the really last line */
CG(zend_lineno) = decl->end_lineno;
zend_do_extended_stmt();
zend_emit_final_return(0);
pass_two(CG(active_op_array));
zend_oparray_context_end(&orig_oparray_context);
/* Pop the loop variable stack separator */
zend_stack_del_top(&CG(loop_var_stack));
CG(active_op_array) = orig_op_array;
CG(active_class_entry) = orig_class_entry;
}
/* }}} */
void zend_compile_prop_decl(zend_ast *ast, zend_ast *type_ast, uint32_t flags) /* {{{ */
{
zend_ast_list *list = zend_ast_get_list(ast);
zend_class_entry *ce = CG(active_class_entry);
uint32_t i, children = list->children;
if (ce->ce_flags & ZEND_ACC_INTERFACE) {
zend_error_noreturn(E_COMPILE_ERROR, "Interfaces may not include member variables");
}
if (flags & ZEND_ACC_ABSTRACT) {
zend_error_noreturn(E_COMPILE_ERROR, "Properties cannot be declared abstract");
}
for (i = 0; i < children; ++i) {
zend_ast *prop_ast = list->child[i];
zend_ast *name_ast = prop_ast->child[0];
zend_ast *value_ast = prop_ast->child[1];
zend_ast *doc_comment_ast = prop_ast->child[2];
zend_string *name = zval_make_interned_string(zend_ast_get_zval(name_ast));
zend_string *doc_comment = NULL;
zval value_zv;
zend_type type = ZEND_TYPE_INIT_NONE(0);
if (type_ast) {
type = zend_compile_typename(type_ast, /* force_allow_null */ 0, /* use_arena */ 1);
if (ZEND_TYPE_FULL_MASK(type) & (MAY_BE_VOID|MAY_BE_CALLABLE)) {
zend_string *str = zend_type_to_string(type);
zend_error_noreturn(E_COMPILE_ERROR,
"Property %s::$%s cannot have type %s",
ZSTR_VAL(ce->name), ZSTR_VAL(name), ZSTR_VAL(str));
}
}
/* Doc comment has been appended as last element in ZEND_AST_PROP_ELEM ast */
if (doc_comment_ast) {
doc_comment = zend_string_copy(zend_ast_get_str(doc_comment_ast));
}
if (flags & ZEND_ACC_FINAL) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot declare property %s::$%s final, "
"the final modifier is allowed only for methods and classes",
ZSTR_VAL(ce->name), ZSTR_VAL(name));
}
if (zend_hash_exists(&ce->properties_info, name)) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot redeclare %s::$%s",
ZSTR_VAL(ce->name), ZSTR_VAL(name));
}
if (value_ast) {
zend_const_expr_to_zval(&value_zv, value_ast);
if (ZEND_TYPE_IS_SET(type) && !Z_CONSTANT(value_zv)
&& !zend_is_valid_default_value(type, &value_zv)) {
zend_string *str = zend_type_to_string(type);
if (Z_TYPE(value_zv) == IS_NULL) {
zend_error_noreturn(E_COMPILE_ERROR,
"Default value for property of type %s may not be null. "
"Use the nullable type ?%s to allow null default value",
ZSTR_VAL(str), ZSTR_VAL(str));
} else {
zend_error_noreturn(E_COMPILE_ERROR,
"Cannot use %s as default value for property %s::$%s of type %s",
zend_get_type_by_const(Z_TYPE(value_zv)),
ZSTR_VAL(ce->name), ZSTR_VAL(name), ZSTR_VAL(str));
}
}
} else if (!ZEND_TYPE_IS_SET(type)) {
ZVAL_NULL(&value_zv);
} else {
ZVAL_UNDEF(&value_zv);
}
zend_declare_typed_property(ce, name, &value_zv, flags, doc_comment, type);
}
}
/* }}} */
void zend_compile_prop_group(zend_ast *list) /* {{{ */
{
zend_ast *type_ast = list->child[0];
zend_ast *prop_ast = list->child[1];
zend_compile_prop_decl(prop_ast, type_ast, list->attr);
}
/* }}} */
static void zend_check_const_and_trait_alias_attr(uint32_t attr, const char* entity) /* {{{ */
{
if (attr & ZEND_ACC_STATIC) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot use 'static' as %s modifier", entity);
} else if (attr & ZEND_ACC_ABSTRACT) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot use 'abstract' as %s modifier", entity);
} else if (attr & ZEND_ACC_FINAL) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot use 'final' as %s modifier", entity);
}
}
/* }}} */
void zend_compile_class_const_decl(zend_ast *ast) /* {{{ */
{
zend_ast_list *list = zend_ast_get_list(ast);
zend_class_entry *ce = CG(active_class_entry);
uint32_t i;
if ((ce->ce_flags & ZEND_ACC_TRAIT) != 0) {
zend_error_noreturn(E_COMPILE_ERROR, "Traits cannot have constants");
return;
}
for (i = 0; i < list->children; ++i) {
zend_ast *const_ast = list->child[i];
zend_ast *name_ast = const_ast->child[0];
zend_ast *value_ast = const_ast->child[1];
zend_ast *doc_comment_ast = const_ast->child[2];
zend_string *name = zval_make_interned_string(zend_ast_get_zval(name_ast));
zend_string *doc_comment = doc_comment_ast ? zend_string_copy(zend_ast_get_str(doc_comment_ast)) : NULL;
zval value_zv;
if (UNEXPECTED(ast->attr & (ZEND_ACC_STATIC|ZEND_ACC_ABSTRACT|ZEND_ACC_FINAL))) {
zend_check_const_and_trait_alias_attr(ast->attr, "constant");
}
zend_const_expr_to_zval(&value_zv, value_ast);
zend_declare_class_constant_ex(ce, name, &value_zv, ast->attr, doc_comment);
}
}
/* }}} */
static void zend_compile_method_ref(zend_ast *ast, zend_trait_method_reference *method_ref) /* {{{ */
{
zend_ast *class_ast = ast->child[0];
zend_ast *method_ast = ast->child[1];
method_ref->method_name = zend_string_copy(zend_ast_get_str(method_ast));
if (class_ast) {
method_ref->class_name = zend_resolve_const_class_name_reference(class_ast, "trait name");
} else {
method_ref->class_name = NULL;
}
}
/* }}} */
static void zend_compile_trait_precedence(zend_ast *ast) /* {{{ */
{
zend_ast *method_ref_ast = ast->child[0];
zend_ast *insteadof_ast = ast->child[1];
zend_ast_list *insteadof_list = zend_ast_get_list(insteadof_ast);
uint32_t i;
zend_trait_precedence *precedence = emalloc(sizeof(zend_trait_precedence) + (insteadof_list->children - 1) * sizeof(zend_string*));
zend_compile_method_ref(method_ref_ast, &precedence->trait_method);
precedence->num_excludes = insteadof_list->children;
for (i = 0; i < insteadof_list->children; ++i) {
zend_ast *name_ast = insteadof_list->child[i];
precedence->exclude_class_names[i] =
zend_resolve_const_class_name_reference(name_ast, "trait name");
}
zend_add_to_list(&CG(active_class_entry)->trait_precedences, precedence);
}
/* }}} */
static void zend_compile_trait_alias(zend_ast *ast) /* {{{ */
{
zend_ast *method_ref_ast = ast->child[0];
zend_ast *alias_ast = ast->child[1];
uint32_t modifiers = ast->attr;
zend_trait_alias *alias;
zend_check_const_and_trait_alias_attr(modifiers, "method");
alias = emalloc(sizeof(zend_trait_alias));
zend_compile_method_ref(method_ref_ast, &alias->trait_method);
alias->modifiers = modifiers;
if (alias_ast) {
alias->alias = zend_string_copy(zend_ast_get_str(alias_ast));
} else {
alias->alias = NULL;
}
zend_add_to_list(&CG(active_class_entry)->trait_aliases, alias);
}
/* }}} */
void zend_compile_use_trait(zend_ast *ast) /* {{{ */
{
zend_ast_list *traits = zend_ast_get_list(ast->child[0]);
zend_ast_list *adaptations = ast->child[1] ? zend_ast_get_list(ast->child[1]) : NULL;
zend_class_entry *ce = CG(active_class_entry);
uint32_t i;
ce->ce_flags |= ZEND_ACC_IMPLEMENT_TRAITS;
ce->trait_names = erealloc(ce->trait_names, sizeof(zend_class_name) * (ce->num_traits + traits->children));
for (i = 0; i < traits->children; ++i) {
zend_ast *trait_ast = traits->child[i];
if (ce->ce_flags & ZEND_ACC_INTERFACE) {
zend_string *name = zend_ast_get_str(trait_ast);
zend_error_noreturn(E_COMPILE_ERROR, "Cannot use traits inside of interfaces. "
"%s is used in %s", ZSTR_VAL(name), ZSTR_VAL(ce->name));
}
ce->trait_names[ce->num_traits].name =
zend_resolve_const_class_name_reference(trait_ast, "trait name");
ce->trait_names[ce->num_traits].lc_name = zend_string_tolower(ce->trait_names[ce->num_traits].name);
ce->num_traits++;
}
if (!adaptations) {
return;
}
for (i = 0; i < adaptations->children; ++i) {
zend_ast *adaptation_ast = adaptations->child[i];
switch (adaptation_ast->kind) {
case ZEND_AST_TRAIT_PRECEDENCE:
zend_compile_trait_precedence(adaptation_ast);
break;
case ZEND_AST_TRAIT_ALIAS:
zend_compile_trait_alias(adaptation_ast);
break;
EMPTY_SWITCH_DEFAULT_CASE()
}
}
}
/* }}} */
void zend_compile_implements(zend_ast *ast) /* {{{ */
{
zend_ast_list *list = zend_ast_get_list(ast);
zend_class_entry *ce = CG(active_class_entry);
zend_class_name *interface_names;
uint32_t i;
interface_names = emalloc(sizeof(zend_class_name) * list->children);
for (i = 0; i < list->children; ++i) {
zend_ast *class_ast = list->child[i];
interface_names[i].name =
zend_resolve_const_class_name_reference(class_ast, "interface name");
interface_names[i].lc_name = zend_string_tolower(interface_names[i].name);
}
ce->ce_flags |= ZEND_ACC_IMPLEMENT_INTERFACES;
ce->num_interfaces = list->children;
ce->interface_names = interface_names;
}
/* }}} */
static zend_string *zend_generate_anon_class_name(uint32_t start_lineno) /* {{{ */
{
zend_string *filename = CG(active_op_array)->filename;
zend_string *result = zend_strpprintf(0, "class@anonymous%c%s:%" PRIu32 "$%" PRIx32,
'\0', ZSTR_VAL(filename), start_lineno, CG(rtd_key_counter)++);
return zend_new_interned_string(result);
}
/* }}} */
zend_op *zend_compile_class_decl(zend_ast *ast, zend_bool toplevel) /* {{{ */
{
zend_ast_decl *decl = (zend_ast_decl *) ast;
zend_ast *extends_ast = decl->child[0];
zend_ast *implements_ast = decl->child[1];
zend_ast *stmt_ast = decl->child[2];
zend_string *name, *lcname;
zend_class_entry *ce = zend_arena_alloc(&CG(arena), sizeof(zend_class_entry));
zend_op *opline;
zend_class_entry *original_ce = CG(active_class_entry);
if (EXPECTED((decl->flags & ZEND_ACC_ANON_CLASS) == 0)) {
zend_string *unqualified_name = decl->name;
if (CG(active_class_entry)) {
zend_error_noreturn(E_COMPILE_ERROR, "Class declarations may not be nested");
}
zend_assert_valid_class_name(unqualified_name);
name = zend_prefix_with_ns(unqualified_name);
name = zend_new_interned_string(name);
lcname = zend_string_tolower(name);
if (FC(imports)) {
zend_string *import_name = zend_hash_find_ptr_lc(
FC(imports), ZSTR_VAL(unqualified_name), ZSTR_LEN(unqualified_name));
if (import_name && !zend_string_equals_ci(lcname, import_name)) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot declare class %s "
"because the name is already in use", ZSTR_VAL(name));
}
}
zend_register_seen_symbol(lcname, ZEND_SYMBOL_CLASS);
} else {
name = zend_generate_anon_class_name(decl->start_lineno);
lcname = zend_string_tolower(name);
}
lcname = zend_new_interned_string(lcname);
ce->type = ZEND_USER_CLASS;
ce->name = name;
zend_initialize_class_data(ce, 1);
if (CG(compiler_options) & ZEND_COMPILE_PRELOAD) {
ce->ce_flags |= ZEND_ACC_PRELOADED;
ZEND_MAP_PTR_NEW(ce->static_members_table);
}
ce->ce_flags |= decl->flags;
ce->info.user.filename = zend_get_compiled_filename();
ce->info.user.line_start = decl->start_lineno;
ce->info.user.line_end = decl->end_lineno;
if (decl->doc_comment) {
ce->info.user.doc_comment = zend_string_copy(decl->doc_comment);
}
if (UNEXPECTED((decl->flags & ZEND_ACC_ANON_CLASS))) {
/* Serialization is not supported for anonymous classes */
ce->serialize = zend_class_serialize_deny;
ce->unserialize = zend_class_unserialize_deny;
}
if (extends_ast) {
ce->parent_name =
zend_resolve_const_class_name_reference(extends_ast, "class name");
ce->ce_flags |= ZEND_ACC_INHERITED;
}
CG(active_class_entry) = ce;
zend_compile_stmt(stmt_ast);
/* Reset lineno for final opcodes and errors */
CG(zend_lineno) = ast->lineno;
if (ce->constructor) {
ce->constructor->common.fn_flags |= ZEND_ACC_CTOR;
if (ce->constructor->common.fn_flags & ZEND_ACC_STATIC) {
zend_error_noreturn(E_COMPILE_ERROR, "Constructor %s::%s() cannot be static",
ZSTR_VAL(ce->name), ZSTR_VAL(ce->constructor->common.function_name));
}
if (ce->constructor->common.fn_flags & ZEND_ACC_HAS_RETURN_TYPE) {
zend_error_noreturn(E_COMPILE_ERROR,
"Constructor %s::%s() cannot declare a return type",
ZSTR_VAL(ce->name), ZSTR_VAL(ce->constructor->common.function_name));
}
}
if (ce->destructor) {
ce->destructor->common.fn_flags |= ZEND_ACC_DTOR;
if (ce->destructor->common.fn_flags & ZEND_ACC_STATIC) {
zend_error_noreturn(E_COMPILE_ERROR, "Destructor %s::%s() cannot be static",
ZSTR_VAL(ce->name), ZSTR_VAL(ce->destructor->common.function_name));
} else if (ce->destructor->common.fn_flags & ZEND_ACC_HAS_RETURN_TYPE) {
zend_error_noreturn(E_COMPILE_ERROR,
"Destructor %s::%s() cannot declare a return type",
ZSTR_VAL(ce->name), ZSTR_VAL(ce->destructor->common.function_name));
}
}
if (ce->clone) {
if (ce->clone->common.fn_flags & ZEND_ACC_STATIC) {
zend_error_noreturn(E_COMPILE_ERROR, "Clone method %s::%s() cannot be static",
ZSTR_VAL(ce->name), ZSTR_VAL(ce->clone->common.function_name));
} else if (ce->clone->common.fn_flags & ZEND_ACC_HAS_RETURN_TYPE) {
zend_error_noreturn(E_COMPILE_ERROR,
"Clone method %s::%s() cannot declare a return type",
ZSTR_VAL(ce->name), ZSTR_VAL(ce->clone->common.function_name));
}
}
if (implements_ast) {
zend_compile_implements(implements_ast);
}
if ((ce->ce_flags & (ZEND_ACC_IMPLICIT_ABSTRACT_CLASS|ZEND_ACC_INTERFACE|ZEND_ACC_TRAIT|ZEND_ACC_EXPLICIT_ABSTRACT_CLASS)) == ZEND_ACC_IMPLICIT_ABSTRACT_CLASS) {
zend_verify_abstract_class(ce);
}
CG(active_class_entry) = original_ce;
if (toplevel) {
ce->ce_flags |= ZEND_ACC_TOP_LEVEL;
}
if (toplevel
/* We currently don't early-bind classes that implement interfaces or use traits */
&& !(ce->ce_flags & (ZEND_ACC_IMPLEMENT_INTERFACES|ZEND_ACC_IMPLEMENT_TRAITS))
&& !(CG(compiler_options) & ZEND_COMPILE_PRELOAD)) {
if (extends_ast) {
zend_class_entry *parent_ce = zend_lookup_class_ex(
ce->parent_name, NULL, ZEND_FETCH_CLASS_NO_AUTOLOAD);
if (parent_ce
&& ((parent_ce->type != ZEND_INTERNAL_CLASS) || !(CG(compiler_options) & ZEND_COMPILE_IGNORE_INTERNAL_CLASSES))
&& ((parent_ce->type != ZEND_USER_CLASS) || !(CG(compiler_options) & ZEND_COMPILE_IGNORE_OTHER_FILES) || (parent_ce->info.user.filename == ce->info.user.filename))) {
CG(zend_lineno) = decl->end_lineno;
if (zend_try_early_bind(ce, parent_ce, lcname, NULL)) {
CG(zend_lineno) = ast->lineno;
zend_string_release(lcname);
return NULL;
}
CG(zend_lineno) = ast->lineno;
}
} else if (EXPECTED(zend_hash_add_ptr(CG(class_table), lcname, ce) != NULL)) {
zend_string_release(lcname);
zend_build_properties_info_table(ce);
ce->ce_flags |= ZEND_ACC_LINKED;
return NULL;
}
}
opline = get_next_op();
if (ce->parent_name) {
/* Lowercased parent name */
zend_string *lc_parent_name = zend_string_tolower(ce->parent_name);
opline->op2_type = IS_CONST;
LITERAL_STR(opline->op2, lc_parent_name);
}
opline->op1_type = IS_CONST;
LITERAL_STR(opline->op1, lcname);
if (decl->flags & ZEND_ACC_ANON_CLASS) {
opline->opcode = ZEND_DECLARE_ANON_CLASS;
opline->extended_value = zend_alloc_cache_slot();
opline->result_type = IS_VAR;
opline->result.var = get_temporary_variable();
if (!zend_hash_add_ptr(CG(class_table), lcname, ce)) {
zend_error_noreturn(E_ERROR,
"Runtime definition key collision for %s. This is a bug", ZSTR_VAL(name));
}
} else {
zend_string *key = zend_build_runtime_definition_key(lcname, decl->start_lineno);
/* RTD key is placed after lcname literal in op1 */
zend_add_literal_string(&key);
if (!zend_hash_add_ptr(CG(class_table), key, ce)) {
zend_error_noreturn(E_ERROR,
"Runtime definition key collision for class %s. This is a bug", ZSTR_VAL(name));
}
opline->opcode = ZEND_DECLARE_CLASS;
if (extends_ast && toplevel
&& (CG(compiler_options) & ZEND_COMPILE_DELAYED_BINDING)
/* We currently don't early-bind classes that implement interfaces or use traits */
&& !(ce->ce_flags & (ZEND_ACC_IMPLEMENT_INTERFACES|ZEND_ACC_IMPLEMENT_TRAITS))
) {
CG(active_op_array)->fn_flags |= ZEND_ACC_EARLY_BINDING;
opline->opcode = ZEND_DECLARE_CLASS_DELAYED;
opline->extended_value = zend_alloc_cache_slot();
opline->result_type = IS_UNUSED;
opline->result.opline_num = -1;
}
}
return opline;
}
/* }}} */
static HashTable *zend_get_import_ht(uint32_t type) /* {{{ */
{
switch (type) {
case ZEND_SYMBOL_CLASS:
if (!FC(imports)) {
FC(imports) = emalloc(sizeof(HashTable));
zend_hash_init(FC(imports), 8, NULL, str_dtor, 0);
}
return FC(imports);
case ZEND_SYMBOL_FUNCTION:
if (!FC(imports_function)) {
FC(imports_function) = emalloc(sizeof(HashTable));
zend_hash_init(FC(imports_function), 8, NULL, str_dtor, 0);
}
return FC(imports_function);
case ZEND_SYMBOL_CONST:
if (!FC(imports_const)) {
FC(imports_const) = emalloc(sizeof(HashTable));
zend_hash_init(FC(imports_const), 8, NULL, str_dtor, 0);
}
return FC(imports_const);
EMPTY_SWITCH_DEFAULT_CASE()
}
return NULL;
}
/* }}} */
static char *zend_get_use_type_str(uint32_t type) /* {{{ */
{
switch (type) {
case ZEND_SYMBOL_CLASS:
return "";
case ZEND_SYMBOL_FUNCTION:
return " function";
case ZEND_SYMBOL_CONST:
return " const";
EMPTY_SWITCH_DEFAULT_CASE()
}
return " unknown";
}
/* }}} */
static void zend_check_already_in_use(uint32_t type, zend_string *old_name, zend_string *new_name, zend_string *check_name) /* {{{ */
{
if (zend_string_equals_ci(old_name, check_name)) {
return;
}
zend_error_noreturn(E_COMPILE_ERROR, "Cannot use%s %s as %s because the name "
"is already in use", zend_get_use_type_str(type), ZSTR_VAL(old_name), ZSTR_VAL(new_name));
}
/* }}} */
void zend_compile_use(zend_ast *ast) /* {{{ */
{
zend_ast_list *list = zend_ast_get_list(ast);
uint32_t i;
zend_string *current_ns = FC(current_namespace);
uint32_t type = ast->attr;
HashTable *current_import = zend_get_import_ht(type);
zend_bool case_sensitive = type == ZEND_SYMBOL_CONST;
for (i = 0; i < list->children; ++i) {
zend_ast *use_ast = list->child[i];
zend_ast *old_name_ast = use_ast->child[0];
zend_ast *new_name_ast = use_ast->child[1];
zend_string *old_name = zend_ast_get_str(old_name_ast);
zend_string *new_name, *lookup_name;
if (new_name_ast) {
new_name = zend_string_copy(zend_ast_get_str(new_name_ast));
} else {
const char *unqualified_name;
size_t unqualified_name_len;
if (zend_get_unqualified_name(old_name, &unqualified_name, &unqualified_name_len)) {
/* The form "use A\B" is equivalent to "use A\B as B" */
new_name = zend_string_init(unqualified_name, unqualified_name_len, 0);
} else {
new_name = zend_string_copy(old_name);
if (!current_ns) {
zend_error(E_WARNING, "The use statement with non-compound name '%s' "
"has no effect", ZSTR_VAL(new_name));
}
}
}
if (case_sensitive) {
lookup_name = zend_string_copy(new_name);
} else {
lookup_name = zend_string_tolower(new_name);
}
if (type == ZEND_SYMBOL_CLASS && zend_is_reserved_class_name(new_name)) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot use %s as %s because '%s' "
"is a special class name", ZSTR_VAL(old_name), ZSTR_VAL(new_name), ZSTR_VAL(new_name));
}
if (current_ns) {
zend_string *ns_name = zend_string_alloc(ZSTR_LEN(current_ns) + 1 + ZSTR_LEN(new_name), 0);
zend_str_tolower_copy(ZSTR_VAL(ns_name), ZSTR_VAL(current_ns), ZSTR_LEN(current_ns));
ZSTR_VAL(ns_name)[ZSTR_LEN(current_ns)] = '\\';
memcpy(ZSTR_VAL(ns_name) + ZSTR_LEN(current_ns) + 1, ZSTR_VAL(lookup_name), ZSTR_LEN(lookup_name) + 1);
if (zend_have_seen_symbol(ns_name, type)) {
zend_check_already_in_use(type, old_name, new_name, ns_name);
}
zend_string_efree(ns_name);
} else if (zend_have_seen_symbol(lookup_name, type)) {
zend_check_already_in_use(type, old_name, new_name, lookup_name);
}
zend_string_addref(old_name);
old_name = zend_new_interned_string(old_name);
if (!zend_hash_add_ptr(current_import, lookup_name, old_name)) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot use%s %s as %s because the name "
"is already in use", zend_get_use_type_str(type), ZSTR_VAL(old_name), ZSTR_VAL(new_name));
}
zend_string_release_ex(lookup_name, 0);
zend_string_release_ex(new_name, 0);
}
}
/* }}} */
void zend_compile_group_use(zend_ast *ast) /* {{{ */
{
uint32_t i;
zend_string *ns = zend_ast_get_str(ast->child[0]);
zend_ast_list *list = zend_ast_get_list(ast->child[1]);
for (i = 0; i < list->children; i++) {
zend_ast *inline_use, *use = list->child[i];
zval *name_zval = zend_ast_get_zval(use->child[0]);
zend_string *name = Z_STR_P(name_zval);
zend_string *compound_ns = zend_concat_names(ZSTR_VAL(ns), ZSTR_LEN(ns), ZSTR_VAL(name), ZSTR_LEN(name));
zend_string_release_ex(name, 0);
ZVAL_STR(name_zval, compound_ns);
inline_use = zend_ast_create_list(1, ZEND_AST_USE, use);
inline_use->attr = ast->attr ? ast->attr : use->attr;
zend_compile_use(inline_use);
}
}
/* }}} */
void zend_compile_const_decl(zend_ast *ast) /* {{{ */
{
zend_ast_list *list = zend_ast_get_list(ast);
uint32_t i;
for (i = 0; i < list->children; ++i) {
zend_ast *const_ast = list->child[i];
zend_ast *name_ast = const_ast->child[0];
zend_ast *value_ast = const_ast->child[1];
zend_string *unqualified_name = zend_ast_get_str(name_ast);
zend_string *name;
znode name_node, value_node;
zval *value_zv = &value_node.u.constant;
value_node.op_type = IS_CONST;
zend_const_expr_to_zval(value_zv, value_ast);
if (zend_get_special_const(ZSTR_VAL(unqualified_name), ZSTR_LEN(unqualified_name))) {
zend_error_noreturn(E_COMPILE_ERROR,
"Cannot redeclare constant '%s'", ZSTR_VAL(unqualified_name));
}
name = zend_prefix_with_ns(unqualified_name);
name = zend_new_interned_string(name);
if (FC(imports_const)) {
zend_string *import_name = zend_hash_find_ptr(FC(imports_const), unqualified_name);
if (import_name && !zend_string_equals(import_name, name)) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot declare const %s because "
"the name is already in use", ZSTR_VAL(name));
}
}
name_node.op_type = IS_CONST;
ZVAL_STR(&name_node.u.constant, name);
zend_emit_op(NULL, ZEND_DECLARE_CONST, &name_node, &value_node);
zend_register_seen_symbol(name, ZEND_SYMBOL_CONST);
}
}
/* }}}*/
void zend_compile_namespace(zend_ast *ast) /* {{{ */
{
zend_ast *name_ast = ast->child[0];
zend_ast *stmt_ast = ast->child[1];
zend_string *name;
zend_bool with_bracket = stmt_ast != NULL;
/* handle mixed syntax declaration or nested namespaces */
if (!FC(has_bracketed_namespaces)) {
if (FC(current_namespace)) {
/* previous namespace declarations were unbracketed */
if (with_bracket) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot mix bracketed namespace declarations "
"with unbracketed namespace declarations");
}
}
} else {
/* previous namespace declarations were bracketed */
if (!with_bracket) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot mix bracketed namespace declarations "
"with unbracketed namespace declarations");
} else if (FC(current_namespace) || FC(in_namespace)) {
zend_error_noreturn(E_COMPILE_ERROR, "Namespace declarations cannot be nested");
}
}
if (((!with_bracket && !FC(current_namespace))
|| (with_bracket && !FC(has_bracketed_namespaces))) && CG(active_op_array)->last > 0
) {
/* ignore ZEND_EXT_STMT and ZEND_TICKS */
uint32_t num = CG(active_op_array)->last;
while (num > 0 &&
(CG(active_op_array)->opcodes[num-1].opcode == ZEND_EXT_STMT ||
CG(active_op_array)->opcodes[num-1].opcode == ZEND_TICKS)) {
--num;
}
if (num > 0) {
zend_error_noreturn(E_COMPILE_ERROR, "Namespace declaration statement has to be "
"the very first statement or after any declare call in the script");
}
}
if (FC(current_namespace)) {
zend_string_release_ex(FC(current_namespace), 0);
}
if (name_ast) {
name = zend_ast_get_str(name_ast);
if (ZEND_FETCH_CLASS_DEFAULT != zend_get_class_fetch_type(name)) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot use '%s' as namespace name", ZSTR_VAL(name));
}
FC(current_namespace) = zend_string_copy(name);
} else {
FC(current_namespace) = NULL;
}
zend_reset_import_tables();
FC(in_namespace) = 1;
if (with_bracket) {
FC(has_bracketed_namespaces) = 1;
}
if (stmt_ast) {
zend_compile_top_stmt(stmt_ast);
zend_end_namespace();
}
}
/* }}} */
void zend_compile_halt_compiler(zend_ast *ast) /* {{{ */
{
zend_ast *offset_ast = ast->child[0];
zend_long offset = Z_LVAL_P(zend_ast_get_zval(offset_ast));
zend_string *filename, *name;
const char const_name[] = "__COMPILER_HALT_OFFSET__";
if (FC(has_bracketed_namespaces) && FC(in_namespace)) {
zend_error_noreturn(E_COMPILE_ERROR,
"__HALT_COMPILER() can only be used from the outermost scope");
}
filename = zend_get_compiled_filename();
name = zend_mangle_property_name(const_name, sizeof(const_name) - 1,
ZSTR_VAL(filename), ZSTR_LEN(filename), 0);
zend_register_long_constant(ZSTR_VAL(name), ZSTR_LEN(name), offset, CONST_CS, 0);
zend_string_release_ex(name, 0);
}
/* }}} */
static zend_bool zend_try_ct_eval_magic_const(zval *zv, zend_ast *ast) /* {{{ */
{
zend_op_array *op_array = CG(active_op_array);
zend_class_entry *ce = CG(active_class_entry);
switch (ast->attr) {
case T_LINE:
ZVAL_LONG(zv, ast->lineno);
break;
case T_FILE:
ZVAL_STR_COPY(zv, CG(compiled_filename));
break;
case T_DIR:
{
zend_string *filename = CG(compiled_filename);
zend_string *dirname = zend_string_init(ZSTR_VAL(filename), ZSTR_LEN(filename), 0);
#ifdef ZEND_WIN32
ZSTR_LEN(dirname) = php_win32_ioutil_dirname(ZSTR_VAL(dirname), ZSTR_LEN(dirname));
#else
ZSTR_LEN(dirname) = zend_dirname(ZSTR_VAL(dirname), ZSTR_LEN(dirname));
#endif
if (strcmp(ZSTR_VAL(dirname), ".") == 0) {
dirname = zend_string_extend(dirname, MAXPATHLEN, 0);
#if HAVE_GETCWD
ZEND_IGNORE_VALUE(VCWD_GETCWD(ZSTR_VAL(dirname), MAXPATHLEN));
#elif HAVE_GETWD
ZEND_IGNORE_VALUE(VCWD_GETWD(ZSTR_VAL(dirname)));
#endif
ZSTR_LEN(dirname) = strlen(ZSTR_VAL(dirname));
}
ZVAL_STR(zv, dirname);
break;
}
case T_FUNC_C:
if (op_array && op_array->function_name) {
ZVAL_STR_COPY(zv, op_array->function_name);
} else {
ZVAL_EMPTY_STRING(zv);
}
break;
case T_METHOD_C:
/* Detect whether we are directly inside a class (e.g. a class constant) and treat
* this as not being inside a function. */
if (op_array && ce && !op_array->scope && !(op_array->fn_flags & ZEND_ACC_CLOSURE)) {
op_array = NULL;
}
if (op_array && op_array->function_name) {
if (op_array->scope) {
ZVAL_NEW_STR(zv, zend_concat3(
ZSTR_VAL(op_array->scope->name), ZSTR_LEN(op_array->scope->name),
"::", 2,
ZSTR_VAL(op_array->function_name), ZSTR_LEN(op_array->function_name)));
} else {
ZVAL_STR_COPY(zv, op_array->function_name);
}
} else {
ZVAL_EMPTY_STRING(zv);
}
break;
case T_CLASS_C:
if (ce) {
if ((ce->ce_flags & ZEND_ACC_TRAIT) != 0) {
return 0;
} else {
ZVAL_STR_COPY(zv, ce->name);
}
} else {
ZVAL_EMPTY_STRING(zv);
}
break;
case T_TRAIT_C:
if (ce && (ce->ce_flags & ZEND_ACC_TRAIT) != 0) {
ZVAL_STR_COPY(zv, ce->name);
} else {
ZVAL_EMPTY_STRING(zv);
}
break;
case T_NS_C:
if (FC(current_namespace)) {
ZVAL_STR_COPY(zv, FC(current_namespace));
} else {
ZVAL_EMPTY_STRING(zv);
}
break;
EMPTY_SWITCH_DEFAULT_CASE()
}
return 1;
}
/* }}} */
ZEND_API zend_bool zend_binary_op_produces_numeric_string_error(uint32_t opcode, zval *op1, zval *op2) /* {{{ */
{
if (!(opcode == ZEND_ADD || opcode == ZEND_SUB || opcode == ZEND_MUL || opcode == ZEND_DIV
|| opcode == ZEND_POW || opcode == ZEND_MOD || opcode == ZEND_SL || opcode == ZEND_SR
|| opcode == ZEND_BW_OR || opcode == ZEND_BW_AND || opcode == ZEND_BW_XOR)) {
return 0;
}
/* While basic arithmetic operators always produce numeric string errors,
* bitwise operators don't produce errors if both operands are strings */
if ((opcode == ZEND_BW_OR || opcode == ZEND_BW_AND || opcode == ZEND_BW_XOR)
&& Z_TYPE_P(op1) == IS_STRING && Z_TYPE_P(op2) == IS_STRING) {
return 0;
}
if (Z_TYPE_P(op1) == IS_STRING
&& !is_numeric_string(Z_STRVAL_P(op1), Z_STRLEN_P(op1), NULL, NULL, 0)) {
return 1;
}
if (Z_TYPE_P(op2) == IS_STRING
&& !is_numeric_string(Z_STRVAL_P(op2), Z_STRLEN_P(op2), NULL, NULL, 0)) {
return 1;
}
return 0;
}
/* }}} */
ZEND_API zend_bool zend_binary_op_produces_array_conversion_error(uint32_t opcode, zval *op1, zval *op2) /* {{{ */
{
if (opcode == ZEND_CONCAT && (Z_TYPE_P(op1) == IS_ARRAY || Z_TYPE_P(op2) == IS_ARRAY)) {
return 1;
}
return 0;
}
/* }}} */
static inline zend_bool zend_try_ct_eval_binary_op(zval *result, uint32_t opcode, zval *op1, zval *op2) /* {{{ */
{
binary_op_type fn = get_binary_op(opcode);
/* don't evaluate division by zero at compile-time */
if ((opcode == ZEND_DIV || opcode == ZEND_MOD) &&
zval_get_long(op2) == 0) {
return 0;
} else if ((opcode == ZEND_SL || opcode == ZEND_SR) &&
zval_get_long(op2) < 0) {
return 0;
}
/* don't evaluate numeric string error-producing operations at compile-time */
if (zend_binary_op_produces_numeric_string_error(opcode, op1, op2)) {
return 0;
}
/* don't evaluate array to string conversions at compile-time */
if (zend_binary_op_produces_array_conversion_error(opcode, op1, op2)) {
return 0;
}
fn(result, op1, op2);
return 1;
}
/* }}} */
static inline void zend_ct_eval_unary_op(zval *result, uint32_t opcode, zval *op) /* {{{ */
{
unary_op_type fn = get_unary_op(opcode);
fn(result, op);
}
/* }}} */
static inline zend_bool zend_try_ct_eval_unary_pm(zval *result, zend_ast_kind kind, zval *op) /* {{{ */
{
zval left;
ZVAL_LONG(&left, (kind == ZEND_AST_UNARY_PLUS) ? 1 : -1);
return zend_try_ct_eval_binary_op(result, ZEND_MUL, &left, op);
}
/* }}} */
static inline void zend_ct_eval_greater(zval *result, zend_ast_kind kind, zval *op1, zval *op2) /* {{{ */
{
binary_op_type fn = kind == ZEND_AST_GREATER
? is_smaller_function : is_smaller_or_equal_function;
fn(result, op2, op1);
}
/* }}} */
static zend_bool zend_try_ct_eval_array(zval *result, zend_ast *ast) /* {{{ */
{
zend_ast_list *list = zend_ast_get_list(ast);
zend_ast *last_elem_ast = NULL;
uint32_t i;
zend_bool is_constant = 1;
if (ast->attr == ZEND_ARRAY_SYNTAX_LIST) {
zend_error(E_COMPILE_ERROR, "Cannot use list() as standalone expression");
}
/* First ensure that *all* child nodes are constant and by-val */
for (i = 0; i < list->children; ++i) {
zend_ast *elem_ast = list->child[i];
if (elem_ast == NULL) {
/* Report error at line of last non-empty element */
if (last_elem_ast) {
CG(zend_lineno) = zend_ast_get_lineno(last_elem_ast);
}
zend_error(E_COMPILE_ERROR, "Cannot use empty array elements in arrays");
}
if (elem_ast->kind != ZEND_AST_UNPACK) {
zend_eval_const_expr(&elem_ast->child[0]);
zend_eval_const_expr(&elem_ast->child[1]);
if (elem_ast->attr /* by_ref */ || elem_ast->child[0]->kind != ZEND_AST_ZVAL
|| (elem_ast->child[1] && elem_ast->child[1]->kind != ZEND_AST_ZVAL)
) {
is_constant = 0;
}
} else {
zend_eval_const_expr(&elem_ast->child[0]);
if (elem_ast->child[0]->kind != ZEND_AST_ZVAL) {
is_constant = 0;
}
}
last_elem_ast = elem_ast;
}
if (!is_constant) {
return 0;
}
if (!list->children) {
ZVAL_EMPTY_ARRAY(result);
return 1;
}
array_init_size(result, list->children);
for (i = 0; i < list->children; ++i) {
zend_ast *elem_ast = list->child[i];
zend_ast *value_ast = elem_ast->child[0];
zend_ast *key_ast;
zval *value = zend_ast_get_zval(value_ast);
if (elem_ast->kind == ZEND_AST_UNPACK) {
if (Z_TYPE_P(value) == IS_ARRAY) {
HashTable *ht = Z_ARRVAL_P(value);
zval *val;
zend_string *key;
ZEND_HASH_FOREACH_STR_KEY_VAL(ht, key, val) {
if (key) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot unpack array with string keys");
}
if (!zend_hash_next_index_insert(Z_ARRVAL_P(result), val)) {
zval_ptr_dtor(result);
return 0;
}
Z_TRY_ADDREF_P(val);
} ZEND_HASH_FOREACH_END();
continue;
} else {
zend_error_noreturn(E_COMPILE_ERROR, "Only arrays and Traversables can be unpacked");
}
}
Z_TRY_ADDREF_P(value);
key_ast = elem_ast->child[1];
if (key_ast) {
zval *key = zend_ast_get_zval(key_ast);
switch (Z_TYPE_P(key)) {
case IS_LONG:
zend_hash_index_update(Z_ARRVAL_P(result), Z_LVAL_P(key), value);
break;
case IS_STRING:
zend_symtable_update(Z_ARRVAL_P(result), Z_STR_P(key), value);
break;
case IS_DOUBLE:
zend_hash_index_update(Z_ARRVAL_P(result),
zend_dval_to_lval(Z_DVAL_P(key)), value);
break;
case IS_FALSE:
zend_hash_index_update(Z_ARRVAL_P(result), 0, value);
break;
case IS_TRUE:
zend_hash_index_update(Z_ARRVAL_P(result), 1, value);
break;
case IS_NULL:
zend_hash_update(Z_ARRVAL_P(result), ZSTR_EMPTY_ALLOC(), value);
break;
default:
zend_error_noreturn(E_COMPILE_ERROR, "Illegal offset type");
break;
}
} else if (!zend_hash_next_index_insert(Z_ARRVAL_P(result), value)) {
zval_ptr_dtor_nogc(value);
zval_ptr_dtor(result);
return 0;
}
}
return 1;
}
/* }}} */
void zend_compile_binary_op(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *left_ast = ast->child[0];
zend_ast *right_ast = ast->child[1];
uint32_t opcode = ast->attr;
znode left_node, right_node;
zend_compile_expr(&left_node, left_ast);
zend_compile_expr(&right_node, right_ast);
if (left_node.op_type == IS_CONST && right_node.op_type == IS_CONST) {
if (zend_try_ct_eval_binary_op(&result->u.constant, opcode,
&left_node.u.constant, &right_node.u.constant)
) {
result->op_type = IS_CONST;
zval_ptr_dtor(&left_node.u.constant);
zval_ptr_dtor(&right_node.u.constant);
return;
}
}
do {
if (opcode == ZEND_IS_EQUAL || opcode == ZEND_IS_NOT_EQUAL) {
if (left_node.op_type == IS_CONST) {
if (Z_TYPE(left_node.u.constant) == IS_FALSE) {
opcode = (opcode == ZEND_IS_NOT_EQUAL) ? ZEND_BOOL : ZEND_BOOL_NOT;
zend_emit_op_tmp(result, opcode, &right_node, NULL);
break;
} else if (Z_TYPE(left_node.u.constant) == IS_TRUE) {
opcode = (opcode == ZEND_IS_EQUAL) ? ZEND_BOOL : ZEND_BOOL_NOT;
zend_emit_op_tmp(result, opcode, &right_node, NULL);
break;
}
} else if (right_node.op_type == IS_CONST) {
if (Z_TYPE(right_node.u.constant) == IS_FALSE) {
opcode = (opcode == ZEND_IS_NOT_EQUAL) ? ZEND_BOOL : ZEND_BOOL_NOT;
zend_emit_op_tmp(result, opcode, &left_node, NULL);
break;
} else if (Z_TYPE(right_node.u.constant) == IS_TRUE) {
opcode = (opcode == ZEND_IS_EQUAL) ? ZEND_BOOL : ZEND_BOOL_NOT;
zend_emit_op_tmp(result, opcode, &left_node, NULL);
break;
}
}
} else if (opcode == ZEND_IS_IDENTICAL || opcode == ZEND_IS_NOT_IDENTICAL) {
/* convert $x === null to is_null($x) (i.e. ZEND_TYPE_CHECK opcode). Do the same thing for false/true. (covers IS_NULL, IS_FALSE, and IS_TRUE) */
if (left_node.op_type == IS_CONST) {
if (Z_TYPE(left_node.u.constant) <= IS_TRUE && Z_TYPE(left_node.u.constant) >= IS_NULL) {
zend_op *opline = zend_emit_op_tmp(result, ZEND_TYPE_CHECK, &right_node, NULL);
opline->extended_value =
(opcode == ZEND_IS_IDENTICAL) ?
(1 << Z_TYPE(left_node.u.constant)) :
(MAY_BE_ANY - (1 << Z_TYPE(left_node.u.constant)));
return;
}
} else if (right_node.op_type == IS_CONST) {
if (Z_TYPE(right_node.u.constant) <= IS_TRUE && Z_TYPE(right_node.u.constant) >= IS_NULL) {
zend_op *opline = zend_emit_op_tmp(result, ZEND_TYPE_CHECK, &left_node, NULL);
opline->extended_value =
(opcode == ZEND_IS_IDENTICAL) ?
(1 << Z_TYPE(right_node.u.constant)) :
(MAY_BE_ANY - (1 << Z_TYPE(right_node.u.constant)));
return;
}
}
} else if (opcode == ZEND_CONCAT) {
/* convert constant operands to strings at compile-time */
if (left_node.op_type == IS_CONST) {
if (Z_TYPE(left_node.u.constant) == IS_ARRAY) {
zend_emit_op_tmp(&left_node, ZEND_CAST, &left_node, NULL)->extended_value = IS_STRING;
} else {
convert_to_string(&left_node.u.constant);
}
}
if (right_node.op_type == IS_CONST) {
if (Z_TYPE(right_node.u.constant) == IS_ARRAY) {
zend_emit_op_tmp(&right_node, ZEND_CAST, &right_node, NULL)->extended_value = IS_STRING;
} else {
convert_to_string(&right_node.u.constant);
}
}
if (left_node.op_type == IS_CONST && right_node.op_type == IS_CONST) {
opcode = ZEND_FAST_CONCAT;
}
}
zend_emit_op_tmp(result, opcode, &left_node, &right_node);
} while (0);
}
/* }}} */
/* We do not use zend_compile_binary_op for this because we want to retain the left-to-right
* evaluation order. */
void zend_compile_greater(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *left_ast = ast->child[0];
zend_ast *right_ast = ast->child[1];
znode left_node, right_node;
ZEND_ASSERT(ast->kind == ZEND_AST_GREATER || ast->kind == ZEND_AST_GREATER_EQUAL);
zend_compile_expr(&left_node, left_ast);
zend_compile_expr(&right_node, right_ast);
if (left_node.op_type == IS_CONST && right_node.op_type == IS_CONST) {
result->op_type = IS_CONST;
zend_ct_eval_greater(&result->u.constant, ast->kind,
&left_node.u.constant, &right_node.u.constant);
zval_ptr_dtor(&left_node.u.constant);
zval_ptr_dtor(&right_node.u.constant);
return;
}
zend_emit_op_tmp(result,
ast->kind == ZEND_AST_GREATER ? ZEND_IS_SMALLER : ZEND_IS_SMALLER_OR_EQUAL,
&right_node, &left_node);
}
/* }}} */
void zend_compile_unary_op(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *expr_ast = ast->child[0];
uint32_t opcode = ast->attr;
znode expr_node;
zend_compile_expr(&expr_node, expr_ast);
if (expr_node.op_type == IS_CONST) {
result->op_type = IS_CONST;
zend_ct_eval_unary_op(&result->u.constant, opcode,
&expr_node.u.constant);
zval_ptr_dtor(&expr_node.u.constant);
return;
}
zend_emit_op_tmp(result, opcode, &expr_node, NULL);
}
/* }}} */
void zend_compile_unary_pm(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *expr_ast = ast->child[0];
znode expr_node;
znode lefthand_node;
ZEND_ASSERT(ast->kind == ZEND_AST_UNARY_PLUS || ast->kind == ZEND_AST_UNARY_MINUS);
zend_compile_expr(&expr_node, expr_ast);
if (expr_node.op_type == IS_CONST
&& zend_try_ct_eval_unary_pm(&result->u.constant, ast->kind, &expr_node.u.constant)) {
result->op_type = IS_CONST;
zval_ptr_dtor(&expr_node.u.constant);
return;
}
lefthand_node.op_type = IS_CONST;
ZVAL_LONG(&lefthand_node.u.constant, (ast->kind == ZEND_AST_UNARY_PLUS) ? 1 : -1);
zend_emit_op_tmp(result, ZEND_MUL, &lefthand_node, &expr_node);
}
/* }}} */
void zend_compile_short_circuiting(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *left_ast = ast->child[0];
zend_ast *right_ast = ast->child[1];
znode left_node, right_node;
zend_op *opline_jmpz, *opline_bool;
uint32_t opnum_jmpz;
ZEND_ASSERT(ast->kind == ZEND_AST_AND || ast->kind == ZEND_AST_OR);
zend_compile_expr(&left_node, left_ast);
if (left_node.op_type == IS_CONST) {
if ((ast->kind == ZEND_AST_AND && !zend_is_true(&left_node.u.constant))
|| (ast->kind == ZEND_AST_OR && zend_is_true(&left_node.u.constant))) {
result->op_type = IS_CONST;
ZVAL_BOOL(&result->u.constant, zend_is_true(&left_node.u.constant));
} else {
zend_compile_expr(&right_node, right_ast);
if (right_node.op_type == IS_CONST) {
result->op_type = IS_CONST;
ZVAL_BOOL(&result->u.constant, zend_is_true(&right_node.u.constant));
zval_ptr_dtor(&right_node.u.constant);
} else {
zend_emit_op_tmp(result, ZEND_BOOL, &right_node, NULL);
}
}
zval_ptr_dtor(&left_node.u.constant);
return;
}
opnum_jmpz = get_next_op_number();
opline_jmpz = zend_emit_op(NULL, ast->kind == ZEND_AST_AND ? ZEND_JMPZ_EX : ZEND_JMPNZ_EX,
&left_node, NULL);
if (left_node.op_type == IS_TMP_VAR) {
SET_NODE(opline_jmpz->result, &left_node);
} else {
opline_jmpz->result.var = get_temporary_variable();
opline_jmpz->result_type = IS_TMP_VAR;
}
GET_NODE(result, opline_jmpz->result);
zend_compile_expr(&right_node, right_ast);
opline_bool = zend_emit_op(NULL, ZEND_BOOL, &right_node, NULL);
SET_NODE(opline_bool->result, result);
zend_update_jump_target_to_next(opnum_jmpz);
}
/* }}} */
void zend_compile_post_incdec(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *var_ast = ast->child[0];
ZEND_ASSERT(ast->kind == ZEND_AST_POST_INC || ast->kind == ZEND_AST_POST_DEC);
zend_ensure_writable_variable(var_ast);
if (var_ast->kind == ZEND_AST_PROP) {
zend_op *opline = zend_compile_prop(NULL, var_ast, BP_VAR_RW, 0);
opline->opcode = ast->kind == ZEND_AST_POST_INC ? ZEND_POST_INC_OBJ : ZEND_POST_DEC_OBJ;
zend_make_tmp_result(result, opline);
} else if (var_ast->kind == ZEND_AST_STATIC_PROP) {
zend_op *opline = zend_compile_static_prop(NULL, var_ast, BP_VAR_RW, 0, 0);
opline->opcode = ast->kind == ZEND_AST_POST_INC ? ZEND_POST_INC_STATIC_PROP : ZEND_POST_DEC_STATIC_PROP;
zend_make_tmp_result(result, opline);
} else {
znode var_node;
zend_compile_var(&var_node, var_ast, BP_VAR_RW, 0);
zend_emit_op_tmp(result, ast->kind == ZEND_AST_POST_INC ? ZEND_POST_INC : ZEND_POST_DEC,
&var_node, NULL);
}
}
/* }}} */
void zend_compile_pre_incdec(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *var_ast = ast->child[0];
ZEND_ASSERT(ast->kind == ZEND_AST_PRE_INC || ast->kind == ZEND_AST_PRE_DEC);
zend_ensure_writable_variable(var_ast);
if (var_ast->kind == ZEND_AST_PROP) {
zend_op *opline = zend_compile_prop(result, var_ast, BP_VAR_RW, 0);
opline->opcode = ast->kind == ZEND_AST_PRE_INC ? ZEND_PRE_INC_OBJ : ZEND_PRE_DEC_OBJ;
} else if (var_ast->kind == ZEND_AST_STATIC_PROP) {
zend_op *opline = zend_compile_static_prop(result, var_ast, BP_VAR_RW, 0, 0);
opline->opcode = ast->kind == ZEND_AST_PRE_INC ? ZEND_PRE_INC_STATIC_PROP : ZEND_PRE_DEC_STATIC_PROP;
} else {
znode var_node;
zend_compile_var(&var_node, var_ast, BP_VAR_RW, 0);
zend_emit_op(result, ast->kind == ZEND_AST_PRE_INC ? ZEND_PRE_INC : ZEND_PRE_DEC,
&var_node, NULL);
}
}
/* }}} */
void zend_compile_cast(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *expr_ast = ast->child[0];
znode expr_node;
zend_op *opline;
zend_compile_expr(&expr_node, expr_ast);
if (ast->attr == _IS_BOOL) {
opline = zend_emit_op_tmp(result, ZEND_BOOL, &expr_node, NULL);
} else if (ast->attr == IS_NULL) {
zend_error(E_COMPILE_ERROR, "The (unset) cast is no longer supported");
} else {
opline = zend_emit_op_tmp(result, ZEND_CAST, &expr_node, NULL);
opline->extended_value = ast->attr;
}
}
/* }}} */
static void zend_compile_shorthand_conditional(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *cond_ast = ast->child[0];
zend_ast *false_ast = ast->child[2];
znode cond_node, false_node;
zend_op *opline_qm_assign;
uint32_t opnum_jmp_set;
ZEND_ASSERT(ast->child[1] == NULL);
zend_compile_expr(&cond_node, cond_ast);
opnum_jmp_set = get_next_op_number();
zend_emit_op_tmp(result, ZEND_JMP_SET, &cond_node, NULL);
zend_compile_expr(&false_node, false_ast);
opline_qm_assign = zend_emit_op_tmp(NULL, ZEND_QM_ASSIGN, &false_node, NULL);
SET_NODE(opline_qm_assign->result, result);
zend_update_jump_target_to_next(opnum_jmp_set);
}
/* }}} */
void zend_compile_conditional(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *cond_ast = ast->child[0];
zend_ast *true_ast = ast->child[1];
zend_ast *false_ast = ast->child[2];
znode cond_node, true_node, false_node;
zend_op *opline_qm_assign2;
uint32_t opnum_jmpz, opnum_jmp;
if (cond_ast->kind == ZEND_AST_CONDITIONAL
&& cond_ast->attr != ZEND_PARENTHESIZED_CONDITIONAL) {
if (cond_ast->child[1]) {
if (true_ast) {
zend_error(E_DEPRECATED,
"Unparenthesized `a ? b : c ? d : e` is deprecated. "
"Use either `(a ? b : c) ? d : e` or `a ? b : (c ? d : e)`");
} else {
zend_error(E_DEPRECATED,
"Unparenthesized `a ? b : c ?: d` is deprecated. "
"Use either `(a ? b : c) ?: d` or `a ? b : (c ?: d)`");
}
} else {
if (true_ast) {
zend_error(E_DEPRECATED,
"Unparenthesized `a ?: b ? c : d` is deprecated. "
"Use either `(a ?: b) ? c : d` or `a ?: (b ? c : d)`");
} else {
/* This case is harmless: (a ?: b) ?: c always produces the same result
* as a ?: (b ?: c). */
}
}
}
if (!true_ast) {
zend_compile_shorthand_conditional(result, ast);
return;
}
zend_compile_expr(&cond_node, cond_ast);
opnum_jmpz = zend_emit_cond_jump(ZEND_JMPZ, &cond_node, 0);
zend_compile_expr(&true_node, true_ast);
zend_emit_op_tmp(result, ZEND_QM_ASSIGN, &true_node, NULL);
opnum_jmp = zend_emit_jump(0);
zend_update_jump_target_to_next(opnum_jmpz);
zend_compile_expr(&false_node, false_ast);
opline_qm_assign2 = zend_emit_op(NULL, ZEND_QM_ASSIGN, &false_node, NULL);
SET_NODE(opline_qm_assign2->result, result);
zend_update_jump_target_to_next(opnum_jmp);
}
/* }}} */
void zend_compile_coalesce(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *expr_ast = ast->child[0];
zend_ast *default_ast = ast->child[1];
znode expr_node, default_node;
zend_op *opline;
uint32_t opnum;
zend_compile_var(&expr_node, expr_ast, BP_VAR_IS, 0);
opnum = get_next_op_number();
zend_emit_op_tmp(result, ZEND_COALESCE, &expr_node, NULL);
zend_compile_expr(&default_node, default_ast);
opline = zend_emit_op_tmp(NULL, ZEND_QM_ASSIGN, &default_node, NULL);
SET_NODE(opline->result, result);
opline = &CG(active_op_array)->opcodes[opnum];
opline->op2.opline_num = get_next_op_number();
}
/* }}} */
static void znode_dtor(zval *zv) {
znode *node = Z_PTR_P(zv);
if (node->op_type == IS_CONST) {
zval_ptr_dtor_nogc(&node->u.constant);
}
efree(node);
}
void zend_compile_assign_coalesce(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *var_ast = ast->child[0];
zend_ast *default_ast = ast->child[1];
znode var_node_is, var_node_w, default_node, assign_node, *node;
zend_op *opline;
uint32_t coalesce_opnum;
zend_bool need_frees = 0;
/* Remember expressions compiled during the initial BP_VAR_IS lookup,
* to avoid double-evaluation when we compile again with BP_VAR_W. */
HashTable *orig_memoized_exprs = CG(memoized_exprs);
int orig_memoize_mode = CG(memoize_mode);
zend_ensure_writable_variable(var_ast);
if (is_this_fetch(var_ast)) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot re-assign $this");
}
ALLOC_HASHTABLE(CG(memoized_exprs));
zend_hash_init(CG(memoized_exprs), 0, NULL, znode_dtor, 0);
CG(memoize_mode) = ZEND_MEMOIZE_COMPILE;
zend_compile_var(&var_node_is, var_ast, BP_VAR_IS, 0);
coalesce_opnum = get_next_op_number();
zend_emit_op_tmp(result, ZEND_COALESCE, &var_node_is, NULL);
CG(memoize_mode) = ZEND_MEMOIZE_NONE;
zend_compile_expr(&default_node, default_ast);
CG(memoize_mode) = ZEND_MEMOIZE_FETCH;
zend_compile_var(&var_node_w, var_ast, BP_VAR_W, 0);
/* Reproduce some of the zend_compile_assign() opcode fixup logic here. */
opline = &CG(active_op_array)->opcodes[CG(active_op_array)->last-1];
switch (var_ast->kind) {
case ZEND_AST_VAR:
zend_emit_op(&assign_node, ZEND_ASSIGN, &var_node_w, &default_node);
break;
case ZEND_AST_STATIC_PROP:
opline->opcode = ZEND_ASSIGN_STATIC_PROP;
zend_emit_op_data(&default_node);
assign_node = var_node_w;
break;
case ZEND_AST_DIM:
opline->opcode = ZEND_ASSIGN_DIM;
zend_emit_op_data(&default_node);
assign_node = var_node_w;
break;
case ZEND_AST_PROP:
opline->opcode = ZEND_ASSIGN_OBJ;
zend_emit_op_data(&default_node);
assign_node = var_node_w;
break;
EMPTY_SWITCH_DEFAULT_CASE();
}
opline = zend_emit_op_tmp(NULL, ZEND_QM_ASSIGN, &assign_node, NULL);
SET_NODE(opline->result, result);
ZEND_HASH_FOREACH_PTR(CG(memoized_exprs), node) {
if (node->op_type == IS_TMP_VAR || node->op_type == IS_VAR) {
need_frees = 1;
break;
}
} ZEND_HASH_FOREACH_END();
/* Free DUPed expressions if there are any */
if (need_frees) {
uint32_t jump_opnum = zend_emit_jump(0);
zend_update_jump_target_to_next(coalesce_opnum);
ZEND_HASH_FOREACH_PTR(CG(memoized_exprs), node) {
if (node->op_type == IS_TMP_VAR || node->op_type == IS_VAR) {
zend_emit_op(NULL, ZEND_FREE, node, NULL);
}
} ZEND_HASH_FOREACH_END();
zend_update_jump_target_to_next(jump_opnum);
} else {
zend_update_jump_target_to_next(coalesce_opnum);
}
zend_hash_destroy(CG(memoized_exprs));
FREE_HASHTABLE(CG(memoized_exprs));
CG(memoized_exprs) = orig_memoized_exprs;
CG(memoize_mode) = orig_memoize_mode;
}
/* }}} */
void zend_compile_print(znode *result, zend_ast *ast) /* {{{ */
{
zend_op *opline;
zend_ast *expr_ast = ast->child[0];
znode expr_node;
zend_compile_expr(&expr_node, expr_ast);
opline = zend_emit_op(NULL, ZEND_ECHO, &expr_node, NULL);
opline->extended_value = 1;
result->op_type = IS_CONST;
ZVAL_LONG(&result->u.constant, 1);
}
/* }}} */
void zend_compile_exit(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *expr_ast = ast->child[0];
if (expr_ast) {
znode expr_node;
zend_compile_expr(&expr_node, expr_ast);
zend_emit_op(NULL, ZEND_EXIT, &expr_node, NULL);
} else {
zend_emit_op(NULL, ZEND_EXIT, NULL, NULL);
}
result->op_type = IS_CONST;
ZVAL_BOOL(&result->u.constant, 1);
}
/* }}} */
void zend_compile_yield(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *value_ast = ast->child[0];
zend_ast *key_ast = ast->child[1];
znode value_node, key_node;
znode *value_node_ptr = NULL, *key_node_ptr = NULL;
zend_op *opline;
zend_bool returns_by_ref = (CG(active_op_array)->fn_flags & ZEND_ACC_RETURN_REFERENCE) != 0;
zend_mark_function_as_generator();
if (key_ast) {
zend_compile_expr(&key_node, key_ast);
key_node_ptr = &key_node;
}
if (value_ast) {
if (returns_by_ref && zend_is_variable(value_ast)) {
zend_compile_var(&value_node, value_ast, BP_VAR_W, 1);
} else {
zend_compile_expr(&value_node, value_ast);
}
value_node_ptr = &value_node;
}
opline = zend_emit_op(result, ZEND_YIELD, value_node_ptr, key_node_ptr);
if (value_ast && returns_by_ref && zend_is_call(value_ast)) {
opline->extended_value = ZEND_RETURNS_FUNCTION;
}
}
/* }}} */
void zend_compile_yield_from(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *expr_ast = ast->child[0];
znode expr_node;
zend_mark_function_as_generator();
if (CG(active_op_array)->fn_flags & ZEND_ACC_RETURN_REFERENCE) {
zend_error_noreturn(E_COMPILE_ERROR,
"Cannot use \"yield from\" inside a by-reference generator");
}
zend_compile_expr(&expr_node, expr_ast);
zend_emit_op_tmp(result, ZEND_YIELD_FROM, &expr_node, NULL);
}
/* }}} */
void zend_compile_instanceof(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *obj_ast = ast->child[0];
zend_ast *class_ast = ast->child[1];
znode obj_node, class_node;
zend_op *opline;
zend_compile_expr(&obj_node, obj_ast);
if (obj_node.op_type == IS_CONST) {
zend_do_free(&obj_node);
result->op_type = IS_CONST;
ZVAL_FALSE(&result->u.constant);
return;
}
zend_compile_class_ref(&class_node, class_ast,
ZEND_FETCH_CLASS_NO_AUTOLOAD | ZEND_FETCH_CLASS_EXCEPTION);
opline = zend_emit_op_tmp(result, ZEND_INSTANCEOF, &obj_node, NULL);
if (class_node.op_type == IS_CONST) {
opline->op2_type = IS_CONST;
opline->op2.constant = zend_add_class_name_literal(
Z_STR(class_node.u.constant));
opline->extended_value = zend_alloc_cache_slot();
} else {
SET_NODE(opline->op2, &class_node);
}
}
/* }}} */
void zend_compile_include_or_eval(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *expr_ast = ast->child[0];
znode expr_node;
zend_op *opline;
zend_do_extended_fcall_begin();
zend_compile_expr(&expr_node, expr_ast);
opline = zend_emit_op(result, ZEND_INCLUDE_OR_EVAL, &expr_node, NULL);
opline->extended_value = ast->attr;
zend_do_extended_fcall_end();
}
/* }}} */
void zend_compile_isset_or_empty(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *var_ast = ast->child[0];
znode var_node;
zend_op *opline = NULL;
ZEND_ASSERT(ast->kind == ZEND_AST_ISSET || ast->kind == ZEND_AST_EMPTY);
if (!zend_is_variable(var_ast)) {
if (ast->kind == ZEND_AST_EMPTY) {
/* empty(expr) can be transformed to !expr */
zend_ast *not_ast = zend_ast_create_ex(ZEND_AST_UNARY_OP, ZEND_BOOL_NOT, var_ast);
zend_compile_expr(result, not_ast);
return;
} else {
zend_error_noreturn(E_COMPILE_ERROR,
"Cannot use isset() on the result of an expression "
"(you can use \"null !== expression\" instead)");
}
}
switch (var_ast->kind) {
case ZEND_AST_VAR:
if (is_this_fetch(var_ast)) {
opline = zend_emit_op(result, ZEND_ISSET_ISEMPTY_THIS, NULL, NULL);
CG(active_op_array)->fn_flags |= ZEND_ACC_USES_THIS;
} else if (zend_try_compile_cv(&var_node, var_ast) == SUCCESS) {
opline = zend_emit_op(result, ZEND_ISSET_ISEMPTY_CV, &var_node, NULL);
} else {
opline = zend_compile_simple_var_no_cv(result, var_ast, BP_VAR_IS, 0);
opline->opcode = ZEND_ISSET_ISEMPTY_VAR;
}
break;
case ZEND_AST_DIM:
opline = zend_compile_dim(result, var_ast, BP_VAR_IS);
opline->opcode = ZEND_ISSET_ISEMPTY_DIM_OBJ;
break;
case ZEND_AST_PROP:
opline = zend_compile_prop(result, var_ast, BP_VAR_IS, 0);
opline->opcode = ZEND_ISSET_ISEMPTY_PROP_OBJ;
break;
case ZEND_AST_STATIC_PROP:
opline = zend_compile_static_prop(result, var_ast, BP_VAR_IS, 0, 0);
opline->opcode = ZEND_ISSET_ISEMPTY_STATIC_PROP;
break;
EMPTY_SWITCH_DEFAULT_CASE()
}
result->op_type = opline->result_type = IS_TMP_VAR;
if (!(ast->kind == ZEND_AST_ISSET)) {
opline->extended_value |= ZEND_ISEMPTY;
}
}
/* }}} */
void zend_compile_silence(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *expr_ast = ast->child[0];
znode silence_node;
zend_emit_op_tmp(&silence_node, ZEND_BEGIN_SILENCE, NULL, NULL);
if (expr_ast->kind == ZEND_AST_VAR) {
/* For @$var we need to force a FETCH instruction, otherwise the CV access will
* happen outside the silenced section. */
zend_compile_simple_var_no_cv(result, expr_ast, BP_VAR_R, 0 );
} else {
zend_compile_expr(result, expr_ast);
}
zend_emit_op(NULL, ZEND_END_SILENCE, &silence_node, NULL);
}
/* }}} */
void zend_compile_shell_exec(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *expr_ast = ast->child[0];
zval fn_name;
zend_ast *name_ast, *args_ast, *call_ast;
ZVAL_STRING(&fn_name, "shell_exec");
name_ast = zend_ast_create_zval(&fn_name);
args_ast = zend_ast_create_list(1, ZEND_AST_ARG_LIST, expr_ast);
call_ast = zend_ast_create(ZEND_AST_CALL, name_ast, args_ast);
zend_compile_expr(result, call_ast);
zval_ptr_dtor(&fn_name);
}
/* }}} */
void zend_compile_array(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast_list *list = zend_ast_get_list(ast);
zend_op *opline;
uint32_t i, opnum_init = -1;
zend_bool packed = 1;
if (zend_try_ct_eval_array(&result->u.constant, ast)) {
result->op_type = IS_CONST;
return;
}
/* Empty arrays are handled at compile-time */
ZEND_ASSERT(list->children > 0);
for (i = 0; i < list->children; ++i) {
zend_ast *elem_ast = list->child[i];
zend_ast *value_ast, *key_ast;
zend_bool by_ref;
znode value_node, key_node, *key_node_ptr = NULL;
if (elem_ast == NULL) {
zend_error(E_COMPILE_ERROR, "Cannot use empty array elements in arrays");
}
value_ast = elem_ast->child[0];
if (elem_ast->kind == ZEND_AST_UNPACK) {
zend_compile_expr(&value_node, value_ast);
if (i == 0) {
opnum_init = get_next_op_number();
opline = zend_emit_op_tmp(result, ZEND_INIT_ARRAY, NULL, NULL);
}
opline = zend_emit_op(NULL, ZEND_ADD_ARRAY_UNPACK, &value_node, NULL);
SET_NODE(opline->result, result);
continue;
}
key_ast = elem_ast->child[1];
by_ref = elem_ast->attr;
if (key_ast) {
zend_compile_expr(&key_node, key_ast);
zend_handle_numeric_op(&key_node);
key_node_ptr = &key_node;
}
if (by_ref) {
zend_ensure_writable_variable(value_ast);
zend_compile_var(&value_node, value_ast, BP_VAR_W, 1);
} else {
zend_compile_expr(&value_node, value_ast);
}
if (i == 0) {
opnum_init = get_next_op_number();
opline = zend_emit_op_tmp(result, ZEND_INIT_ARRAY, &value_node, key_node_ptr);
opline->extended_value = list->children << ZEND_ARRAY_SIZE_SHIFT;
} else {
opline = zend_emit_op(NULL, ZEND_ADD_ARRAY_ELEMENT,
&value_node, key_node_ptr);
SET_NODE(opline->result, result);
}
opline->extended_value |= by_ref;
if (key_ast && key_node.op_type == IS_CONST && Z_TYPE(key_node.u.constant) == IS_STRING) {
packed = 0;
}
}
/* Add a flag to INIT_ARRAY if we know this array cannot be packed */
if (!packed) {
ZEND_ASSERT(opnum_init != (uint32_t)-1);
opline = &CG(active_op_array)->opcodes[opnum_init];
opline->extended_value |= ZEND_ARRAY_NOT_PACKED;
}
}
/* }}} */
void zend_compile_const(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *name_ast = ast->child[0];
zend_op *opline;
zend_bool is_fully_qualified;
zend_string *orig_name = zend_ast_get_str(name_ast);
zend_string *resolved_name = zend_resolve_const_name(orig_name, name_ast->attr, &is_fully_qualified);
if (zend_string_equals_literal(resolved_name, "__COMPILER_HALT_OFFSET__") || (name_ast->attr != ZEND_NAME_RELATIVE && zend_string_equals_literal(orig_name, "__COMPILER_HALT_OFFSET__"))) {
zend_ast *last = CG(ast);
while (last && last->kind == ZEND_AST_STMT_LIST) {
zend_ast_list *list = zend_ast_get_list(last);
if (list->children == 0) {
break;
}
last = list->child[list->children-1];
}
if (last && last->kind == ZEND_AST_HALT_COMPILER) {
result->op_type = IS_CONST;
ZVAL_LONG(&result->u.constant, Z_LVAL_P(zend_ast_get_zval(last->child[0])));
zend_string_release_ex(resolved_name, 0);
return;
}
}
if (zend_try_ct_eval_const(&result->u.constant, resolved_name, is_fully_qualified)) {
result->op_type = IS_CONST;
zend_string_release_ex(resolved_name, 0);
return;
}
opline = zend_emit_op_tmp(result, ZEND_FETCH_CONSTANT, NULL, NULL);
opline->op2_type = IS_CONST;
if (is_fully_qualified || !FC(current_namespace)) {
opline->op2.constant = zend_add_const_name_literal(
resolved_name, 0);
} else {
opline->op1.num = IS_CONSTANT_UNQUALIFIED_IN_NAMESPACE;
opline->op2.constant = zend_add_const_name_literal(
resolved_name, 1);
}
opline->extended_value = zend_alloc_cache_slot();
}
/* }}} */
void zend_compile_class_const(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *class_ast = ast->child[0];
zend_ast *const_ast = ast->child[1];
znode class_node, const_node;
zend_op *opline;
zend_eval_const_expr(&ast->child[0]);
zend_eval_const_expr(&ast->child[1]);
class_ast = ast->child[0];
const_ast = ast->child[1];
if (class_ast->kind == ZEND_AST_ZVAL) {
zend_string *resolved_name;
resolved_name = zend_resolve_class_name_ast(class_ast);
if (const_ast->kind == ZEND_AST_ZVAL && zend_try_ct_eval_class_const(&result->u.constant, resolved_name, zend_ast_get_str(const_ast))) {
result->op_type = IS_CONST;
zend_string_release_ex(resolved_name, 0);
return;
}
zend_string_release_ex(resolved_name, 0);
}
zend_compile_class_ref(&class_node, class_ast, ZEND_FETCH_CLASS_EXCEPTION);
zend_compile_expr(&const_node, const_ast);
opline = zend_emit_op_tmp(result, ZEND_FETCH_CLASS_CONSTANT, NULL, &const_node);
zend_set_class_name_op1(opline, &class_node);
opline->extended_value = zend_alloc_cache_slots(2);
}
/* }}} */
void zend_compile_class_name(znode *result, zend_ast *ast) /* {{{ */
{
zend_ast *class_ast = ast->child[0];
zend_op *opline;
if (zend_try_compile_const_expr_resolve_class_name(&result->u.constant, class_ast)) {
result->op_type = IS_CONST;
return;
}
opline = zend_emit_op_tmp(result, ZEND_FETCH_CLASS_NAME, NULL, NULL);
opline->op1.num = zend_get_class_fetch_type(zend_ast_get_str(class_ast));
}
/* }}} */
static zend_op *zend_compile_rope_add_ex(zend_op *opline, znode *result, uint32_t num, znode *elem_node) /* {{{ */
{
if (num == 0) {
result->op_type = IS_TMP_VAR;
result->u.op.var = -1;
opline->opcode = ZEND_ROPE_INIT;
} else {
opline->opcode = ZEND_ROPE_ADD;
SET_NODE(opline->op1, result);
}
SET_NODE(opline->op2, elem_node);
SET_NODE(opline->result, result);
opline->extended_value = num;
return opline;
}
/* }}} */
static zend_op *zend_compile_rope_add(znode *result, uint32_t num, znode *elem_node) /* {{{ */
{
zend_op *opline = get_next_op();
if (num == 0) {
result->op_type = IS_TMP_VAR;
result->u.op.var = -1;
opline->opcode = ZEND_ROPE_INIT;
} else {
opline->opcode = ZEND_ROPE_ADD;
SET_NODE(opline->op1, result);
}
SET_NODE(opline->op2, elem_node);
SET_NODE(opline->result, result);
opline->extended_value = num;
return opline;
}
/* }}} */
static void zend_compile_encaps_list(znode *result, zend_ast *ast) /* {{{ */
{
uint32_t i, j;
uint32_t rope_init_lineno = -1;
zend_op *opline = NULL, *init_opline;
znode elem_node, last_const_node;
zend_ast_list *list = zend_ast_get_list(ast);
uint32_t reserved_op_number = -1;
ZEND_ASSERT(list->children > 0);
j = 0;
last_const_node.op_type = IS_UNUSED;
for (i = 0; i < list->children; i++) {
zend_compile_expr(&elem_node, list->child[i]);
if (elem_node.op_type == IS_CONST) {
convert_to_string(&elem_node.u.constant);
if (Z_STRLEN(elem_node.u.constant) == 0) {
zval_ptr_dtor(&elem_node.u.constant);
} else if (last_const_node.op_type == IS_CONST) {
concat_function(&last_const_node.u.constant, &last_const_node.u.constant, &elem_node.u.constant);
zval_ptr_dtor(&elem_node.u.constant);
} else {
last_const_node.op_type = IS_CONST;
ZVAL_COPY_VALUE(&last_const_node.u.constant, &elem_node.u.constant);
/* Reserve place for ZEND_ROPE_ADD instruction */
reserved_op_number = get_next_op_number();
opline = get_next_op();
opline->opcode = ZEND_NOP;
}
continue;
} else {
if (j == 0) {
if (last_const_node.op_type == IS_CONST) {
rope_init_lineno = reserved_op_number;
} else {
rope_init_lineno = get_next_op_number();
}
}
if (last_const_node.op_type == IS_CONST) {
opline = &CG(active_op_array)->opcodes[reserved_op_number];
zend_compile_rope_add_ex(opline, result, j++, &last_const_node);
last_const_node.op_type = IS_UNUSED;
}
opline = zend_compile_rope_add(result, j++, &elem_node);
}
}
if (j == 0) {
result->op_type = IS_CONST;
if (last_const_node.op_type == IS_CONST) {
ZVAL_COPY_VALUE(&result->u.constant, &last_const_node.u.constant);
} else {
ZVAL_EMPTY_STRING(&result->u.constant);
/* empty string */
}
CG(active_op_array)->last = reserved_op_number - 1;
return;
} else if (last_const_node.op_type == IS_CONST) {
opline = &CG(active_op_array)->opcodes[reserved_op_number];
opline = zend_compile_rope_add_ex(opline, result, j++, &last_const_node);
}
init_opline = CG(active_op_array)->opcodes + rope_init_lineno;
if (j == 1) {
if (opline->op2_type == IS_CONST) {
GET_NODE(result, opline->op2);
MAKE_NOP(opline);
} else {
opline->opcode = ZEND_CAST;
opline->extended_value = IS_STRING;
opline->op1_type = opline->op2_type;
opline->op1 = opline->op2;
opline->result_type = IS_TMP_VAR;
opline->result.var = get_temporary_variable();
SET_UNUSED(opline->op2);
GET_NODE(result, opline->result);
}
} else if (j == 2) {
opline->opcode = ZEND_FAST_CONCAT;
opline->extended_value = 0;
opline->op1_type = init_opline->op2_type;
opline->op1 = init_opline->op2;
opline->result_type = IS_TMP_VAR;
opline->result.var = get_temporary_variable();
MAKE_NOP(init_opline);
GET_NODE(result, opline->result);
} else {
uint32_t var;
init_opline->extended_value = j;
opline->opcode = ZEND_ROPE_END;
opline->result.var = get_temporary_variable();
var = opline->op1.var = get_temporary_variable();
GET_NODE(result, opline->result);
/* Allocates the necessary number of zval slots to keep the rope */
i = ((j * sizeof(zend_string*)) + (sizeof(zval) - 1)) / sizeof(zval);
while (i > 1) {
get_temporary_variable();
i--;
}
/* Update all the previous opcodes to use the same variable */
while (opline != init_opline) {
opline--;
if (opline->opcode == ZEND_ROPE_ADD &&
opline->result.var == (uint32_t)-1) {
opline->op1.var = var;
opline->result.var = var;
} else if (opline->opcode == ZEND_ROPE_INIT &&
opline->result.var == (uint32_t)-1) {
opline->result.var = var;
}
}
}
}
/* }}} */
void zend_compile_magic_const(znode *result, zend_ast *ast) /* {{{ */
{
zend_op *opline;
if (zend_try_ct_eval_magic_const(&result->u.constant, ast)) {
result->op_type = IS_CONST;
return;
}
ZEND_ASSERT(ast->attr == T_CLASS_C &&
CG(active_class_entry) &&
(CG(active_class_entry)->ce_flags & ZEND_ACC_TRAIT) != 0);
opline = zend_emit_op_tmp(result, ZEND_FETCH_CLASS_NAME, NULL, NULL);
opline->op1.num = ZEND_FETCH_CLASS_SELF;
}
/* }}} */
zend_bool zend_is_allowed_in_const_expr(zend_ast_kind kind) /* {{{ */
{
return kind == ZEND_AST_ZVAL || kind == ZEND_AST_BINARY_OP
|| kind == ZEND_AST_GREATER || kind == ZEND_AST_GREATER_EQUAL
|| kind == ZEND_AST_AND || kind == ZEND_AST_OR
|| kind == ZEND_AST_UNARY_OP
|| kind == ZEND_AST_UNARY_PLUS || kind == ZEND_AST_UNARY_MINUS
|| kind == ZEND_AST_CONDITIONAL || kind == ZEND_AST_DIM
|| kind == ZEND_AST_ARRAY || kind == ZEND_AST_ARRAY_ELEM
|| kind == ZEND_AST_UNPACK
|| kind == ZEND_AST_CONST || kind == ZEND_AST_CLASS_CONST
|| kind == ZEND_AST_CLASS_NAME
|| kind == ZEND_AST_MAGIC_CONST || kind == ZEND_AST_COALESCE;
}
/* }}} */
void zend_compile_const_expr_class_const(zend_ast **ast_ptr) /* {{{ */
{
zend_ast *ast = *ast_ptr;
zend_ast *class_ast = ast->child[0];
zend_ast *const_ast = ast->child[1];
zend_string *class_name;
zend_string *const_name = zend_ast_get_str(const_ast);
zend_string *name;
int fetch_type;
if (class_ast->kind != ZEND_AST_ZVAL) {
zend_error_noreturn(E_COMPILE_ERROR,
"Dynamic class names are not allowed in compile-time class constant references");
}
class_name = zend_ast_get_str(class_ast);
fetch_type = zend_get_class_fetch_type(class_name);
if (ZEND_FETCH_CLASS_STATIC == fetch_type) {
zend_error_noreturn(E_COMPILE_ERROR,
"\"static::\" is not allowed in compile-time constants");
}
if (ZEND_FETCH_CLASS_DEFAULT == fetch_type) {
class_name = zend_resolve_class_name_ast(class_ast);
} else {
zend_string_addref(class_name);
}
name = zend_concat3(
ZSTR_VAL(class_name), ZSTR_LEN(class_name), "::", 2, ZSTR_VAL(const_name), ZSTR_LEN(const_name));
zend_ast_destroy(ast);
zend_string_release_ex(class_name, 0);
*ast_ptr = zend_ast_create_constant(name, fetch_type | ZEND_FETCH_CLASS_EXCEPTION);
}
/* }}} */
void zend_compile_const_expr_class_name(zend_ast **ast_ptr) /* {{{ */
{
zend_ast *ast = *ast_ptr;
zend_ast *class_ast = ast->child[0];
zend_string *class_name = zend_ast_get_str(class_ast);
uint32_t fetch_type = zend_get_class_fetch_type(class_name);
switch (fetch_type) {
case ZEND_FETCH_CLASS_SELF:
case ZEND_FETCH_CLASS_PARENT:
/* For the const-eval representation store the fetch type instead of the name. */
zend_string_release(class_name);
ast->child[0] = NULL;
ast->attr = fetch_type;
return;
case ZEND_FETCH_CLASS_STATIC:
zend_error_noreturn(E_COMPILE_ERROR,
"static::class cannot be used for compile-time class name resolution");
return;
EMPTY_SWITCH_DEFAULT_CASE()
}
}
void zend_compile_const_expr_const(zend_ast **ast_ptr) /* {{{ */
{
zend_ast *ast = *ast_ptr;
zend_ast *name_ast = ast->child[0];
zend_string *orig_name = zend_ast_get_str(name_ast);
zend_bool is_fully_qualified;
zval result;
zend_string *resolved_name;
resolved_name = zend_resolve_const_name(
orig_name, name_ast->attr, &is_fully_qualified);
if (zend_try_ct_eval_const(&result, resolved_name, is_fully_qualified)) {
zend_string_release_ex(resolved_name, 0);
zend_ast_destroy(ast);
*ast_ptr = zend_ast_create_zval(&result);
return;
}
zend_ast_destroy(ast);
*ast_ptr = zend_ast_create_constant(resolved_name,
!is_fully_qualified && FC(current_namespace) ? IS_CONSTANT_UNQUALIFIED_IN_NAMESPACE : 0);
}
/* }}} */
void zend_compile_const_expr_magic_const(zend_ast **ast_ptr) /* {{{ */
{
zend_ast *ast = *ast_ptr;
/* Other cases already resolved by constant folding */
ZEND_ASSERT(ast->attr == T_CLASS_C);
zend_ast_destroy(ast);
*ast_ptr = zend_ast_create(ZEND_AST_CONSTANT_CLASS);
}
/* }}} */
void zend_compile_const_expr(zend_ast **ast_ptr) /* {{{ */
{
zend_ast *ast = *ast_ptr;
if (ast == NULL || ast->kind == ZEND_AST_ZVAL) {
return;
}
if (!zend_is_allowed_in_const_expr(ast->kind)) {
zend_error_noreturn(E_COMPILE_ERROR, "Constant expression contains invalid operations");
}
switch (ast->kind) {
case ZEND_AST_CLASS_CONST:
zend_compile_const_expr_class_const(ast_ptr);
break;
case ZEND_AST_CLASS_NAME:
zend_compile_const_expr_class_name(ast_ptr);
break;
case ZEND_AST_CONST:
zend_compile_const_expr_const(ast_ptr);
break;
case ZEND_AST_MAGIC_CONST:
zend_compile_const_expr_magic_const(ast_ptr);
break;
default:
zend_ast_apply(ast, zend_compile_const_expr);
break;
}
}
/* }}} */
void zend_const_expr_to_zval(zval *result, zend_ast *ast) /* {{{ */
{
zend_ast *orig_ast = ast;
zend_eval_const_expr(&ast);
zend_compile_const_expr(&ast);
if (ast->kind == ZEND_AST_ZVAL) {
ZVAL_COPY_VALUE(result, zend_ast_get_zval(ast));
} else {
ZVAL_AST(result, zend_ast_copy(ast));
/* destroy the ast here, it might have been replaced */
zend_ast_destroy(ast);
}
/* Kill this branch of the original AST, as it was already destroyed.
* It would be nice to find a better solution to this problem in the
* future. */
orig_ast->kind = 0;
}
/* }}} */
/* Same as compile_stmt, but with early binding */
void zend_compile_top_stmt(zend_ast *ast) /* {{{ */
{
if (!ast) {
return;
}
if (ast->kind == ZEND_AST_STMT_LIST) {
zend_ast_list *list = zend_ast_get_list(ast);
uint32_t i;
for (i = 0; i < list->children; ++i) {
zend_compile_top_stmt(list->child[i]);
}
return;
}
if (ast->kind == ZEND_AST_FUNC_DECL) {
CG(zend_lineno) = ast->lineno;
zend_compile_func_decl(NULL, ast, 1);
CG(zend_lineno) = ((zend_ast_decl *) ast)->end_lineno;
} else if (ast->kind == ZEND_AST_CLASS) {
CG(zend_lineno) = ast->lineno;
zend_compile_class_decl(ast, 1);
CG(zend_lineno) = ((zend_ast_decl *) ast)->end_lineno;
} else {
zend_compile_stmt(ast);
}
if (ast->kind != ZEND_AST_NAMESPACE && ast->kind != ZEND_AST_HALT_COMPILER) {
zend_verify_namespace();
}
}
/* }}} */
void zend_compile_stmt(zend_ast *ast) /* {{{ */
{
if (!ast) {
return;
}
CG(zend_lineno) = ast->lineno;
if ((CG(compiler_options) & ZEND_COMPILE_EXTENDED_STMT) && !zend_is_unticked_stmt(ast)) {
zend_do_extended_stmt();
}
switch (ast->kind) {
case ZEND_AST_STMT_LIST:
zend_compile_stmt_list(ast);
break;
case ZEND_AST_GLOBAL:
zend_compile_global_var(ast);
break;
case ZEND_AST_STATIC:
zend_compile_static_var(ast);
break;
case ZEND_AST_UNSET:
zend_compile_unset(ast);
break;
case ZEND_AST_RETURN:
zend_compile_return(ast);
break;
case ZEND_AST_ECHO:
zend_compile_echo(ast);
break;
case ZEND_AST_THROW:
zend_compile_throw(ast);
break;
case ZEND_AST_BREAK:
case ZEND_AST_CONTINUE:
zend_compile_break_continue(ast);
break;
case ZEND_AST_GOTO:
zend_compile_goto(ast);
break;
case ZEND_AST_LABEL:
zend_compile_label(ast);
break;
case ZEND_AST_WHILE:
zend_compile_while(ast);
break;
case ZEND_AST_DO_WHILE:
zend_compile_do_while(ast);
break;
case ZEND_AST_FOR:
zend_compile_for(ast);
break;
case ZEND_AST_FOREACH:
zend_compile_foreach(ast);
break;
case ZEND_AST_IF:
zend_compile_if(ast);
break;
case ZEND_AST_SWITCH:
zend_compile_switch(ast);
break;
case ZEND_AST_TRY:
zend_compile_try(ast);
break;
case ZEND_AST_DECLARE:
zend_compile_declare(ast);
break;
case ZEND_AST_FUNC_DECL:
case ZEND_AST_METHOD:
zend_compile_func_decl(NULL, ast, 0);
break;
case ZEND_AST_PROP_GROUP:
zend_compile_prop_group(ast);
break;
case ZEND_AST_CLASS_CONST_DECL:
zend_compile_class_const_decl(ast);
break;
case ZEND_AST_USE_TRAIT:
zend_compile_use_trait(ast);
break;
case ZEND_AST_CLASS:
zend_compile_class_decl(ast, 0);
break;
case ZEND_AST_GROUP_USE:
zend_compile_group_use(ast);
break;
case ZEND_AST_USE:
zend_compile_use(ast);
break;
case ZEND_AST_CONST_DECL:
zend_compile_const_decl(ast);
break;
case ZEND_AST_NAMESPACE:
zend_compile_namespace(ast);
break;
case ZEND_AST_HALT_COMPILER:
zend_compile_halt_compiler(ast);
break;
default:
{
znode result;
zend_compile_expr(&result, ast);
zend_do_free(&result);
}
}
if (FC(declarables).ticks && !zend_is_unticked_stmt(ast)) {
zend_emit_tick();
}
}
/* }}} */
void zend_compile_expr(znode *result, zend_ast *ast) /* {{{ */
{
/* CG(zend_lineno) = ast->lineno; */
CG(zend_lineno) = zend_ast_get_lineno(ast);
if (CG(memoize_mode) != ZEND_MEMOIZE_NONE) {
zend_compile_memoized_expr(result, ast);
return;
}
switch (ast->kind) {
case ZEND_AST_ZVAL:
ZVAL_COPY(&result->u.constant, zend_ast_get_zval(ast));
result->op_type = IS_CONST;
return;
case ZEND_AST_ZNODE:
*result = *zend_ast_get_znode(ast);
return;
case ZEND_AST_VAR:
case ZEND_AST_DIM:
case ZEND_AST_PROP:
case ZEND_AST_STATIC_PROP:
case ZEND_AST_CALL:
case ZEND_AST_METHOD_CALL:
case ZEND_AST_STATIC_CALL:
zend_compile_var(result, ast, BP_VAR_R, 0);
return;
case ZEND_AST_ASSIGN:
zend_compile_assign(result, ast);
return;
case ZEND_AST_ASSIGN_REF:
zend_compile_assign_ref(result, ast);
return;
case ZEND_AST_NEW:
zend_compile_new(result, ast);
return;
case ZEND_AST_CLONE:
zend_compile_clone(result, ast);
return;
case ZEND_AST_ASSIGN_OP:
zend_compile_compound_assign(result, ast);
return;
case ZEND_AST_BINARY_OP:
zend_compile_binary_op(result, ast);
return;
case ZEND_AST_GREATER:
case ZEND_AST_GREATER_EQUAL:
zend_compile_greater(result, ast);
return;
case ZEND_AST_UNARY_OP:
zend_compile_unary_op(result, ast);
return;
case ZEND_AST_UNARY_PLUS:
case ZEND_AST_UNARY_MINUS:
zend_compile_unary_pm(result, ast);
return;
case ZEND_AST_AND:
case ZEND_AST_OR:
zend_compile_short_circuiting(result, ast);
return;
case ZEND_AST_POST_INC:
case ZEND_AST_POST_DEC:
zend_compile_post_incdec(result, ast);
return;
case ZEND_AST_PRE_INC:
case ZEND_AST_PRE_DEC:
zend_compile_pre_incdec(result, ast);
return;
case ZEND_AST_CAST:
zend_compile_cast(result, ast);
return;
case ZEND_AST_CONDITIONAL:
zend_compile_conditional(result, ast);
return;
case ZEND_AST_COALESCE:
zend_compile_coalesce(result, ast);
return;
case ZEND_AST_ASSIGN_COALESCE:
zend_compile_assign_coalesce(result, ast);
return;
case ZEND_AST_PRINT:
zend_compile_print(result, ast);
return;
case ZEND_AST_EXIT:
zend_compile_exit(result, ast);
return;
case ZEND_AST_YIELD:
zend_compile_yield(result, ast);
return;
case ZEND_AST_YIELD_FROM:
zend_compile_yield_from(result, ast);
return;
case ZEND_AST_INSTANCEOF:
zend_compile_instanceof(result, ast);
return;
case ZEND_AST_INCLUDE_OR_EVAL:
zend_compile_include_or_eval(result, ast);
return;
case ZEND_AST_ISSET:
case ZEND_AST_EMPTY:
zend_compile_isset_or_empty(result, ast);
return;
case ZEND_AST_SILENCE:
zend_compile_silence(result, ast);
return;
case ZEND_AST_SHELL_EXEC:
zend_compile_shell_exec(result, ast);
return;
case ZEND_AST_ARRAY:
zend_compile_array(result, ast);
return;
case ZEND_AST_CONST:
zend_compile_const(result, ast);
return;
case ZEND_AST_CLASS_CONST:
zend_compile_class_const(result, ast);
return;
case ZEND_AST_CLASS_NAME:
zend_compile_class_name(result, ast);
return;
case ZEND_AST_ENCAPS_LIST:
zend_compile_encaps_list(result, ast);
return;
case ZEND_AST_MAGIC_CONST:
zend_compile_magic_const(result, ast);
return;
case ZEND_AST_CLOSURE:
case ZEND_AST_ARROW_FUNC:
zend_compile_func_decl(result, ast, 0);
return;
default:
ZEND_ASSERT(0 /* not supported */);
}
}
/* }}} */
zend_op *zend_compile_var(znode *result, zend_ast *ast, uint32_t type, int by_ref) /* {{{ */
{
CG(zend_lineno) = zend_ast_get_lineno(ast);
switch (ast->kind) {
case ZEND_AST_VAR:
return zend_compile_simple_var(result, ast, type, 0);
case ZEND_AST_DIM:
return zend_compile_dim(result, ast, type);
case ZEND_AST_PROP:
return zend_compile_prop(result, ast, type, by_ref);
case ZEND_AST_STATIC_PROP:
return zend_compile_static_prop(result, ast, type, by_ref, 0);
case ZEND_AST_CALL:
zend_compile_call(result, ast, type);
return NULL;
case ZEND_AST_METHOD_CALL:
zend_compile_method_call(result, ast, type);
return NULL;
case ZEND_AST_STATIC_CALL:
zend_compile_static_call(result, ast, type);
return NULL;
case ZEND_AST_ZNODE:
*result = *zend_ast_get_znode(ast);
return NULL;
default:
if (type == BP_VAR_W || type == BP_VAR_RW || type == BP_VAR_UNSET) {
zend_error_noreturn(E_COMPILE_ERROR,
"Cannot use temporary expression in write context");
}
zend_compile_expr(result, ast);
return NULL;
}
}
/* }}} */
zend_op *zend_delayed_compile_var(znode *result, zend_ast *ast, uint32_t type, zend_bool by_ref) /* {{{ */
{
switch (ast->kind) {
case ZEND_AST_VAR:
return zend_compile_simple_var(result, ast, type, 1);
case ZEND_AST_DIM:
return zend_delayed_compile_dim(result, ast, type);
case ZEND_AST_PROP:
{
zend_op *opline = zend_delayed_compile_prop(result, ast, type);
if (by_ref) {
opline->extended_value |= ZEND_FETCH_REF;
}
return opline;
}
case ZEND_AST_STATIC_PROP:
return zend_compile_static_prop(result, ast, type, by_ref, 1);
default:
return zend_compile_var(result, ast, type, 0);
}
}
/* }}} */
void zend_eval_const_expr(zend_ast **ast_ptr) /* {{{ */
{
zend_ast *ast = *ast_ptr;
zval result;
if (!ast) {
return;
}
switch (ast->kind) {
case ZEND_AST_BINARY_OP:
zend_eval_const_expr(&ast->child[0]);
zend_eval_const_expr(&ast->child[1]);
if (ast->child[0]->kind != ZEND_AST_ZVAL || ast->child[1]->kind != ZEND_AST_ZVAL) {
return;
}
if (!zend_try_ct_eval_binary_op(&result, ast->attr,
zend_ast_get_zval(ast->child[0]), zend_ast_get_zval(ast->child[1]))
) {
return;
}
break;
case ZEND_AST_GREATER:
case ZEND_AST_GREATER_EQUAL:
zend_eval_const_expr(&ast->child[0]);
zend_eval_const_expr(&ast->child[1]);
if (ast->child[0]->kind != ZEND_AST_ZVAL || ast->child[1]->kind != ZEND_AST_ZVAL) {
return;
}
zend_ct_eval_greater(&result, ast->kind,
zend_ast_get_zval(ast->child[0]), zend_ast_get_zval(ast->child[1]));
break;
case ZEND_AST_AND:
case ZEND_AST_OR:
{
zend_bool child0_is_true, child1_is_true;
zend_eval_const_expr(&ast->child[0]);
zend_eval_const_expr(&ast->child[1]);
if (ast->child[0]->kind != ZEND_AST_ZVAL) {
return;
}
child0_is_true = zend_is_true(zend_ast_get_zval(ast->child[0]));
if (child0_is_true == (ast->kind == ZEND_AST_OR)) {
ZVAL_BOOL(&result, ast->kind == ZEND_AST_OR);
break;
}
if (ast->child[1]->kind != ZEND_AST_ZVAL) {
return;
}
child1_is_true = zend_is_true(zend_ast_get_zval(ast->child[1]));
if (ast->kind == ZEND_AST_OR) {
ZVAL_BOOL(&result, child0_is_true || child1_is_true);
} else {
ZVAL_BOOL(&result, child0_is_true && child1_is_true);
}
break;
}
case ZEND_AST_UNARY_OP:
zend_eval_const_expr(&ast->child[0]);
if (ast->child[0]->kind != ZEND_AST_ZVAL) {
return;
}
zend_ct_eval_unary_op(&result, ast->attr, zend_ast_get_zval(ast->child[0]));
break;
case ZEND_AST_UNARY_PLUS:
case ZEND_AST_UNARY_MINUS:
zend_eval_const_expr(&ast->child[0]);
if (ast->child[0]->kind != ZEND_AST_ZVAL) {
return;
}
if (!zend_try_ct_eval_unary_pm(&result, ast->kind, zend_ast_get_zval(ast->child[0]))) {
return;
}
break;
case ZEND_AST_COALESCE:
/* Set isset fetch indicator here, opcache disallows runtime altering of the AST */
if (ast->child[0]->kind == ZEND_AST_DIM) {
ast->child[0]->attr |= ZEND_DIM_IS;
}
zend_eval_const_expr(&ast->child[0]);
if (ast->child[0]->kind != ZEND_AST_ZVAL) {
/* ensure everything was compile-time evaluated at least once */
zend_eval_const_expr(&ast->child[1]);
return;
}
if (Z_TYPE_P(zend_ast_get_zval(ast->child[0])) == IS_NULL) {
zend_eval_const_expr(&ast->child[1]);
*ast_ptr = ast->child[1];
ast->child[1] = NULL;
zend_ast_destroy(ast);
} else {
*ast_ptr = ast->child[0];
ast->child[0] = NULL;
zend_ast_destroy(ast);
}
return;
case ZEND_AST_CONDITIONAL:
{
zend_ast **child, *child_ast;
zend_eval_const_expr(&ast->child[0]);
if (ast->child[0]->kind != ZEND_AST_ZVAL) {
/* ensure everything was compile-time evaluated at least once */
if (ast->child[1]) {
zend_eval_const_expr(&ast->child[1]);
}
zend_eval_const_expr(&ast->child[2]);
return;
}
child = &ast->child[2 - zend_is_true(zend_ast_get_zval(ast->child[0]))];
if (*child == NULL) {
child--;
}
child_ast = *child;
*child = NULL;
zend_ast_destroy(ast);
*ast_ptr = child_ast;
zend_eval_const_expr(ast_ptr);
return;
}
case ZEND_AST_DIM:
{
/* constant expression should be always read context ... */
zval *container, *dim;
if (ast->child[1] == NULL) {
zend_error_noreturn(E_COMPILE_ERROR, "Cannot use [] for reading");
}
if (ast->attr & ZEND_DIM_ALTERNATIVE_SYNTAX) {
ast->attr &= ~ZEND_DIM_ALTERNATIVE_SYNTAX; /* remove flag to avoid duplicate warning */
zend_error(E_DEPRECATED, "Array and string offset access syntax with curly braces is deprecated");
}
/* Set isset fetch indicator here, opcache disallows runtime altering of the AST */
if (ast->attr & ZEND_DIM_IS && ast->child[0]->kind == ZEND_AST_DIM) {
ast->child[0]->attr |= ZEND_DIM_IS;
}
zend_eval_const_expr(&ast->child[0]);
zend_eval_const_expr(&ast->child[1]);
if (ast->child[0]->kind != ZEND_AST_ZVAL || ast->child[1]->kind != ZEND_AST_ZVAL) {
return;
}
container = zend_ast_get_zval(ast->child[0]);
dim = zend_ast_get_zval(ast->child[1]);
if (Z_TYPE_P(container) == IS_ARRAY) {
zval *el;
if (Z_TYPE_P(dim) == IS_LONG) {
el = zend_hash_index_find(Z_ARR_P(container), Z_LVAL_P(dim));
if (el) {
ZVAL_COPY(&result, el);
} else {
return;
}
} else if (Z_TYPE_P(dim) == IS_STRING) {
el = zend_symtable_find(Z_ARR_P(container), Z_STR_P(dim));
if (el) {
ZVAL_COPY(&result, el);
} else {
return;
}
} else {
return; /* warning... handle at runtime */
}
} else if (Z_TYPE_P(container) == IS_STRING) {
zend_long offset;
zend_uchar c;
if (Z_TYPE_P(dim) == IS_LONG) {
offset = Z_LVAL_P(dim);
} else if (Z_TYPE_P(dim) != IS_STRING || is_numeric_string(Z_STRVAL_P(dim), Z_STRLEN_P(dim), &offset, NULL, 1) != IS_LONG) {
return;
}
if (offset < 0 || (size_t)offset >= Z_STRLEN_P(container)) {
return;
}
c = (zend_uchar) Z_STRVAL_P(container)[offset];
ZVAL_INTERNED_STR(&result, ZSTR_CHAR(c));
} else if (Z_TYPE_P(container) <= IS_FALSE) {
ZVAL_NULL(&result);
} else {
return;
}
break;
}
case ZEND_AST_ARRAY:
if (!zend_try_ct_eval_array(&result, ast)) {
return;
}
break;
case ZEND_AST_MAGIC_CONST:
if (!zend_try_ct_eval_magic_const(&result, ast)) {
return;
}
break;
case ZEND_AST_CONST:
{
zend_ast *name_ast = ast->child[0];
zend_bool is_fully_qualified;
zend_string *resolved_name = zend_resolve_const_name(
zend_ast_get_str(name_ast), name_ast->attr, &is_fully_qualified);
if (!zend_try_ct_eval_const(&result, resolved_name, is_fully_qualified)) {
zend_string_release_ex(resolved_name, 0);
return;
}
zend_string_release_ex(resolved_name, 0);
break;
}
case ZEND_AST_CLASS_CONST:
{
zend_ast *class_ast;
zend_ast *name_ast;
zend_string *resolved_name;
zend_eval_const_expr(&ast->child[0]);
zend_eval_const_expr(&ast->child[1]);
class_ast = ast->child[0];
name_ast = ast->child[1];
if (class_ast->kind != ZEND_AST_ZVAL || name_ast->kind != ZEND_AST_ZVAL) {
return;
}
resolved_name = zend_resolve_class_name_ast(class_ast);
if (!zend_try_ct_eval_class_const(&result, resolved_name, zend_ast_get_str(name_ast))) {
zend_string_release_ex(resolved_name, 0);
return;
}
zend_string_release_ex(resolved_name, 0);
break;
}
case ZEND_AST_CLASS_NAME:
{
zend_ast *class_ast = ast->child[0];
if (!zend_try_compile_const_expr_resolve_class_name(&result, class_ast)) {
return;
}
break;
}
default:
return;
}
zend_ast_destroy(ast);
*ast_ptr = zend_ast_create_zval(&result);
}
/* }}} */
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