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f484801483
php-src/Zend/zend_execute.c
Dmitry Stogov f484801483 Reduced amount of code generated for interrupt handling. 
Improved ZEND_VM_INTERRUPT_CHECK() placement (always perform checks after opcode handler completion, when instruction pointer value is alredy changed to the next opcode).
2016-04-20 11:06:52 +03:00

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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2016 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@zend.com> |
| Zeev Suraski <zeev@zend.com> |
| Dmitry Stogov <dmitry@zend.com> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#define ZEND_INTENSIVE_DEBUGGING 0
#include <stdio.h>
#include <signal.h>
#include "zend.h"
#include "zend_compile.h"
#include "zend_execute.h"
#include "zend_API.h"
#include "zend_ptr_stack.h"
#include "zend_constants.h"
#include "zend_extensions.h"
#include "zend_ini.h"
#include "zend_exceptions.h"
#include "zend_interfaces.h"
#include "zend_closures.h"
#include "zend_generators.h"
#include "zend_vm.h"
#include "zend_dtrace.h"
#include "zend_inheritance.h"
#include "zend_type_info.h"
/* Virtual current working directory support */
#include "zend_virtual_cwd.h"
#define _CONST_CODE 0
#define _TMP_CODE 1
#define _VAR_CODE 2
#define _UNUSED_CODE 3
#define _CV_CODE 4
typedef int (ZEND_FASTCALL *incdec_t)(zval *);
#define get_zval_ptr(op_type, node, ex, should_free, type) _get_zval_ptr(op_type, node, ex, should_free, type)
#define get_zval_ptr_deref(op_type, node, ex, should_free, type) _get_zval_ptr_deref(op_type, node, ex, should_free, type)
#define get_zval_ptr_r(op_type, node, ex, should_free) _get_zval_ptr_r(op_type, node, ex, should_free)
#define get_zval_ptr_r_deref(op_type, node, ex, should_free) _get_zval_ptr_r_deref(op_type, node, ex, should_free)
#define get_zval_ptr_undef(op_type, node, ex, should_free, type) _get_zval_ptr_undef(op_type, node, ex, should_free, type)
#define get_zval_ptr_ptr(op_type, node, ex, should_free, type) _get_zval_ptr_ptr(op_type, node, ex, should_free, type)
#define get_zval_ptr_ptr_undef(op_type, node, ex, should_free, type) _get_zval_ptr_ptr(op_type, node, ex, should_free, type)
#define get_obj_zval_ptr(op_type, node, ex, should_free, type) _get_obj_zval_ptr(op_type, node, ex, should_free, type)
#define get_obj_zval_ptr_undef(op_type, node, ex, should_free, type) _get_obj_zval_ptr_undef(op_type, node, ex, should_free, type)
#define get_obj_zval_ptr_ptr(op_type, node, ex, should_free, type) _get_obj_zval_ptr_ptr(op_type, node, ex, should_free, type)
/* Prototypes */
static void zend_extension_statement_handler(const zend_extension *extension, zend_op_array *op_array);
static void zend_extension_fcall_begin_handler(const zend_extension *extension, zend_op_array *op_array);
static void zend_extension_fcall_end_handler(const zend_extension *extension, zend_op_array *op_array);
#define RETURN_VALUE_USED(opline) ((opline)->result_type != IS_UNUSED)
static ZEND_FUNCTION(pass)
{
}
static const zend_internal_function zend_pass_function = {
ZEND_INTERNAL_FUNCTION, /* type */
{0, 0, 0}, /* arg_flags */
0, /* fn_flags */
NULL, /* name */
NULL, /* scope */
NULL, /* prototype */
0, /* num_args */
0, /* required_num_args */
NULL, /* arg_info */
ZEND_FN(pass), /* handler */
NULL /* module */
};
#undef zval_ptr_dtor
#define zval_ptr_dtor(zv) i_zval_ptr_dtor(zv ZEND_FILE_LINE_CC)
#define READY_TO_DESTROY(zv) \
(UNEXPECTED(zv) && Z_REFCOUNTED_P(zv) && Z_REFCOUNT_P(zv) == 1)
#define EXTRACT_ZVAL_PTR(zv) do { \
zval *__zv = (zv); \
if (EXPECTED(Z_TYPE_P(__zv) == IS_INDIRECT)) { \
ZVAL_COPY(__zv, Z_INDIRECT_P(__zv)); \
} \
} while (0)
#define FREE_OP(should_free) \
if (should_free) { \
zval_ptr_dtor_nogc(should_free); \
}
#define FREE_UNFETCHED_OP(type, var) \
if ((type) & (IS_TMP_VAR|IS_VAR)) { \
zval_ptr_dtor_nogc(EX_VAR(var)); \
}
#define FREE_OP_VAR_PTR(should_free) \
if (should_free) { \
zval_ptr_dtor_nogc(should_free); \
}
#define CV_DEF_OF(i) (EX(func)->op_array.vars[i])
#define ZEND_VM_MAIN_STACK_PAGE_SLOTS (16 * 1024) /* should be a power of 2 */
#define ZEND_VM_GENERATOR_STACK_PAGE_SLOTS (256)
#define ZEND_VM_STACK_PAGE_SLOTS(gen) ((gen) ? ZEND_VM_GENERATOR_STACK_PAGE_SLOTS : ZEND_VM_MAIN_STACK_PAGE_SLOTS)
#define ZEND_VM_STACK_PAGE_SIZE(gen) (ZEND_VM_STACK_PAGE_SLOTS(gen) * sizeof(zval))
#define ZEND_VM_STACK_FREE_PAGE_SIZE(gen) \
((ZEND_VM_STACK_PAGE_SLOTS(gen) - ZEND_VM_STACK_HEADER_SLOTS) * sizeof(zval))
#define ZEND_VM_STACK_PAGE_ALIGNED_SIZE(gen, size) \
(((size) + (ZEND_VM_STACK_FREE_PAGE_SIZE(gen) - 1)) & ~(ZEND_VM_STACK_PAGE_SIZE(gen) - 1))
static zend_always_inline zend_vm_stack zend_vm_stack_new_page(size_t size, zend_vm_stack prev) {
zend_vm_stack page = (zend_vm_stack)emalloc(size);
page->top = ZEND_VM_STACK_ELEMENTS(page);
page->end = (zval*)((char*)page + size);
page->prev = prev;
return page;
}
ZEND_API void zend_vm_stack_init(void)
{
EG(vm_stack) = zend_vm_stack_new_page(ZEND_VM_STACK_PAGE_SIZE(0 /* main stack */), NULL);
EG(vm_stack)->top++;
EG(vm_stack_top) = EG(vm_stack)->top;
EG(vm_stack_end) = EG(vm_stack)->end;
}
ZEND_API void zend_vm_stack_destroy(void)
{
zend_vm_stack stack = EG(vm_stack);
while (stack != NULL) {
zend_vm_stack p = stack->prev;
efree(stack);
stack = p;
}
}
ZEND_API void* zend_vm_stack_extend(size_t size)
{
zend_vm_stack stack;
void *ptr;
stack = EG(vm_stack);
stack->top = EG(vm_stack_top);
EG(vm_stack) = stack = zend_vm_stack_new_page(
EXPECTED(size < ZEND_VM_STACK_FREE_PAGE_SIZE(0)) ?
ZEND_VM_STACK_PAGE_SIZE(0) : ZEND_VM_STACK_PAGE_ALIGNED_SIZE(0, size),
stack);
ptr = stack->top;
EG(vm_stack_top) = (void*)(((char*)ptr) + size);
EG(vm_stack_end) = stack->end;
return ptr;
}
ZEND_API zval* zend_get_compiled_variable_value(const zend_execute_data *execute_data, uint32_t var)
{
return EX_VAR(var);
}
static zend_always_inline zval *_get_zval_ptr_tmp(uint32_t var, const zend_execute_data *execute_data, zend_free_op *should_free)
{
zval *ret = EX_VAR(var);
*should_free = ret;
ZEND_ASSERT(Z_TYPE_P(ret) != IS_REFERENCE);
return ret;
}
static zend_always_inline zval *_get_zval_ptr_var(uint32_t var, const zend_execute_data *execute_data, zend_free_op *should_free)
{
zval *ret = EX_VAR(var);
*should_free = ret;
return ret;
}
static zend_always_inline zval *_get_zval_ptr_var_deref(uint32_t var, const zend_execute_data *execute_data, zend_free_op *should_free)
{
zval *ret = EX_VAR(var);
*should_free = ret;
ZVAL_DEREF(ret);
return ret;
}
static zend_never_inline ZEND_COLD void zval_undefined_cv(uint32_t var, const zend_execute_data *execute_data)
{
zend_string *cv = CV_DEF_OF(EX_VAR_TO_NUM(var));
zend_error(E_NOTICE, "Undefined variable: %s", ZSTR_VAL(cv));
}
static zend_never_inline zval *_get_zval_cv_lookup(zval *ptr, uint32_t var, int type, const zend_execute_data *execute_data)
{
switch (type) {
case BP_VAR_R:
case BP_VAR_UNSET:
zval_undefined_cv(var, execute_data);
/* break missing intentionally */
case BP_VAR_IS:
ptr = &EG(uninitialized_zval);
break;
case BP_VAR_RW:
zval_undefined_cv(var, execute_data);
/* break missing intentionally */
case BP_VAR_W:
ZVAL_NULL(ptr);
break;
}
return ptr;
}
static zend_always_inline zval *_get_zval_cv_lookup_BP_VAR_R(zval *ptr, uint32_t var, const zend_execute_data *execute_data)
{
zval_undefined_cv(var, execute_data);
return &EG(uninitialized_zval);
}
static zend_always_inline zval *_get_zval_cv_lookup_BP_VAR_UNSET(zval *ptr, uint32_t var, const zend_execute_data *execute_data)
{
zval_undefined_cv(var, execute_data);
return &EG(uninitialized_zval);
}
static zend_always_inline zval *_get_zval_cv_lookup_BP_VAR_RW(zval *ptr, uint32_t var, const zend_execute_data *execute_data)
{
ZVAL_NULL(ptr);
zval_undefined_cv(var, execute_data);
return ptr;
}
static zend_always_inline zval *_get_zval_cv_lookup_BP_VAR_W(zval *ptr, uint32_t var, const zend_execute_data *execute_data)
{
ZVAL_NULL(ptr);
return ptr;
}
static zend_always_inline zval *_get_zval_ptr_cv(const zend_execute_data *execute_data, uint32_t var, int type)
{
zval *ret = EX_VAR(var);
if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
return _get_zval_cv_lookup(ret, var, type, execute_data);
}
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_undef(const zend_execute_data *execute_data, uint32_t var)
{
return EX_VAR(var);
}
static zend_always_inline zval *_get_zval_ptr_cv_deref(const zend_execute_data *execute_data, uint32_t var, int type)
{
zval *ret = EX_VAR(var);
if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
return _get_zval_cv_lookup(ret, var, type, execute_data);
}
ZVAL_DEREF(ret);
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_R(const zend_execute_data *execute_data, uint32_t var)
{
zval *ret = EX_VAR(var);
if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
return _get_zval_cv_lookup_BP_VAR_R(ret, var, execute_data);
}
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_deref_BP_VAR_R(const zend_execute_data *execute_data, uint32_t var)
{
zval *ret = EX_VAR(var);
if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
return _get_zval_cv_lookup_BP_VAR_R(ret, var, execute_data);
}
ZVAL_DEREF(ret);
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_UNSET(const zend_execute_data *execute_data, uint32_t var)
{
zval *ret = EX_VAR(var);
if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
return _get_zval_cv_lookup_BP_VAR_UNSET(ret, var, execute_data);
}
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_deref_BP_VAR_UNSET(const zend_execute_data *execute_data, uint32_t var)
{
zval *ret = EX_VAR(var);
if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
return _get_zval_cv_lookup_BP_VAR_UNSET(ret, var, execute_data);
}
ZVAL_DEREF(ret);
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_IS(const zend_execute_data *execute_data, uint32_t var)
{
zval *ret = EX_VAR(var);
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_deref_BP_VAR_IS(const zend_execute_data *execute_data, uint32_t var)
{
zval *ret = EX_VAR(var);
ZVAL_DEREF(ret);
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_RW(const zend_execute_data *execute_data, uint32_t var)
{
zval *ret = EX_VAR(var);
if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
return _get_zval_cv_lookup_BP_VAR_RW(ret, var, execute_data);
}
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_deref_BP_VAR_RW(const zend_execute_data *execute_data, uint32_t var)
{
zval *ret = EX_VAR(var);
if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
return _get_zval_cv_lookup_BP_VAR_RW(ret, var, execute_data);
}
ZVAL_DEREF(ret);
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_W(const zend_execute_data *execute_data, uint32_t var)
{
zval *ret = EX_VAR(var);
if (Z_TYPE_P(ret) == IS_UNDEF) {
return _get_zval_cv_lookup_BP_VAR_W(ret, var, execute_data);
}
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_undef_BP_VAR_W(const zend_execute_data *execute_data, uint32_t var)
{
return EX_VAR(var);
}
static zend_always_inline zval *_get_zval_ptr_cv_undef_BP_VAR_RW(const zend_execute_data *execute_data, uint32_t var)
{
return EX_VAR(var);
}
static zend_always_inline zval *_get_zval_ptr_cv_undef_BP_VAR_UNSET(const zend_execute_data *execute_data, uint32_t var)
{
return EX_VAR(var);
}
static zend_always_inline zval *_get_zval_ptr_cv_deref_BP_VAR_W(const zend_execute_data *execute_data, uint32_t var)
{
zval *ret = EX_VAR(var);
if (Z_TYPE_P(ret) == IS_UNDEF) {
return _get_zval_cv_lookup_BP_VAR_W(ret, var, execute_data);
}
ZVAL_DEREF(ret);
return ret;
}
static zend_always_inline zval *_get_zval_ptr(int op_type, znode_op node, const zend_execute_data *execute_data, zend_free_op *should_free, int type)
{
if (op_type & (IS_TMP_VAR|IS_VAR)) {
if (op_type == IS_TMP_VAR) {
return _get_zval_ptr_tmp(node.var, execute_data, should_free);
} else {
ZEND_ASSERT(op_type == IS_VAR);
return _get_zval_ptr_var(node.var, execute_data, should_free);
}
} else {
*should_free = NULL;
if (op_type == IS_CONST) {
return EX_CONSTANT(node);
} else if (op_type == IS_CV) {
return _get_zval_ptr_cv(execute_data, node.var, type);
} else {
return NULL;
}
}
}
static zend_always_inline zval *_get_zval_ptr_r(int op_type, znode_op node, const zend_execute_data *execute_data, zend_free_op *should_free)
{
if (op_type & (IS_TMP_VAR|IS_VAR)) {
if (op_type == IS_TMP_VAR) {
return _get_zval_ptr_tmp(node.var, execute_data, should_free);
} else {
ZEND_ASSERT(op_type == IS_VAR);
return _get_zval_ptr_var(node.var, execute_data, should_free);
}
} else {
*should_free = NULL;
if (op_type == IS_CONST) {
return EX_CONSTANT(node);
} else if (op_type == IS_CV) {
return _get_zval_ptr_cv_BP_VAR_R(execute_data, node.var);
} else {
return NULL;
}
}
}
static zend_always_inline zval *_get_zval_ptr_deref(int op_type, znode_op node, const zend_execute_data *execute_data, zend_free_op *should_free, int type)
{
if (op_type & (IS_TMP_VAR|IS_VAR)) {
if (op_type == IS_TMP_VAR) {
return _get_zval_ptr_tmp(node.var, execute_data, should_free);
} else {
ZEND_ASSERT(op_type == IS_VAR);
return _get_zval_ptr_var_deref(node.var, execute_data, should_free);
}
} else {
*should_free = NULL;
if (op_type == IS_CONST) {
return EX_CONSTANT(node);
} else if (op_type == IS_CV) {
return _get_zval_ptr_cv_deref(execute_data, node.var, type);
} else {
return NULL;
}
}
}
static zend_always_inline zval *_get_zval_ptr_r_deref(int op_type, znode_op node, const zend_execute_data *execute_data, zend_free_op *should_free)
{
if (op_type & (IS_TMP_VAR|IS_VAR)) {
if (op_type == IS_TMP_VAR) {
return _get_zval_ptr_tmp(node.var, execute_data, should_free);
} else {
ZEND_ASSERT(op_type == IS_VAR);
return _get_zval_ptr_var_deref(node.var, execute_data, should_free);
}
} else {
*should_free = NULL;
if (op_type == IS_CONST) {
return EX_CONSTANT(node);
} else if (op_type == IS_CV) {
return _get_zval_ptr_cv_deref_BP_VAR_R(execute_data, node.var);
} else {
return NULL;
}
}
}
static zend_always_inline zval *_get_zval_ptr_undef(int op_type, znode_op node, const zend_execute_data *execute_data, zend_free_op *should_free, int type)
{
if (op_type & (IS_TMP_VAR|IS_VAR)) {
if (op_type == IS_TMP_VAR) {
return _get_zval_ptr_tmp(node.var, execute_data, should_free);
} else {
ZEND_ASSERT(op_type == IS_VAR);
return _get_zval_ptr_var(node.var, execute_data, should_free);
}
} else {
*should_free = NULL;
if (op_type == IS_CONST) {
return EX_CONSTANT(node);
} else if (op_type == IS_CV) {
return _get_zval_ptr_cv_undef(execute_data, node.var);
} else {
return NULL;
}
}
}
static zend_always_inline zval *_get_zval_ptr_ptr_var(uint32_t var, const zend_execute_data *execute_data, zend_free_op *should_free)
{
zval *ret = EX_VAR(var);
if (EXPECTED(Z_TYPE_P(ret) == IS_INDIRECT)) {
*should_free = NULL;
ret = Z_INDIRECT_P(ret);
} else {
*should_free = ret;
}
return ret;
}
static inline zval *_get_zval_ptr_ptr(int op_type, znode_op node, const zend_execute_data *execute_data, zend_free_op *should_free, int type)
{
if (op_type == IS_CV) {
*should_free = NULL;
return _get_zval_ptr_cv(execute_data, node.var, type);
} else /* if (op_type == IS_VAR) */ {
ZEND_ASSERT(op_type == IS_VAR);
return _get_zval_ptr_ptr_var(node.var, execute_data, should_free);
}
}
static zend_always_inline zval *_get_obj_zval_ptr_unused(zend_execute_data *execute_data)
{
return &EX(This);
}
static inline zval *_get_obj_zval_ptr(int op_type, znode_op op, zend_execute_data *execute_data, zend_free_op *should_free, int type)
{
if (op_type == IS_UNUSED) {
*should_free = NULL;
return &EX(This);
}
return get_zval_ptr(op_type, op, execute_data, should_free, type);
}
static inline zval *_get_obj_zval_ptr_undef(int op_type, znode_op op, zend_execute_data *execute_data, zend_free_op *should_free, int type)
{
if (op_type == IS_UNUSED) {
*should_free = NULL;
return &EX(This);
}
return get_zval_ptr_undef(op_type, op, execute_data, should_free, type);
}
static inline zval *_get_obj_zval_ptr_ptr(int op_type, znode_op node, zend_execute_data *execute_data, zend_free_op *should_free, int type)
{
if (op_type == IS_UNUSED) {
*should_free = NULL;
return &EX(This);
}
return get_zval_ptr_ptr(op_type, node, execute_data, should_free, type);
}
static inline void zend_assign_to_variable_reference(zval *variable_ptr, zval *value_ptr)
{
zend_reference *ref;
if (EXPECTED(!Z_ISREF_P(value_ptr))) {
ZVAL_NEW_REF(value_ptr, value_ptr);
} else if (UNEXPECTED(variable_ptr == value_ptr)) {
return;
}
ref = Z_REF_P(value_ptr);
GC_REFCOUNT(ref)++;
zval_ptr_dtor(variable_ptr);
ZVAL_REF(variable_ptr, ref);
}
/* this should modify object only if it's empty */
static inline int make_real_object(zval *object)
{
if (UNEXPECTED(Z_TYPE_P(object) != IS_OBJECT)) {
if (EXPECTED(Z_TYPE_P(object) <= IS_FALSE)) {
/* nothing to destroy */
} else if (EXPECTED((Z_TYPE_P(object) == IS_STRING && Z_STRLEN_P(object) == 0))) {
zval_ptr_dtor_nogc(object);
} else {
return 0;
}
object_init(object);
zend_error(E_WARNING, "Creating default object from empty value");
}
return 1;
}
static char * zend_verify_internal_arg_class_kind(const zend_internal_arg_info *cur_arg_info, char **class_name, zend_class_entry **pce)
{
zend_string *key;
ALLOCA_FLAG(use_heap);
ZSTR_ALLOCA_INIT(key, cur_arg_info->class_name, strlen(cur_arg_info->class_name), use_heap);
*pce = zend_fetch_class(key, (ZEND_FETCH_CLASS_AUTO | ZEND_FETCH_CLASS_NO_AUTOLOAD));
ZSTR_ALLOCA_FREE(key, use_heap);
*class_name = (*pce) ? ZSTR_VAL((*pce)->name) : (char*)cur_arg_info->class_name;
if (*pce && (*pce)->ce_flags & ZEND_ACC_INTERFACE) {
return "implement interface ";
} else {
return "be an instance of ";
}
}
static zend_always_inline zend_class_entry* zend_verify_arg_class_kind(const zend_arg_info *cur_arg_info)
{
return zend_fetch_class(cur_arg_info->class_name, (ZEND_FETCH_CLASS_AUTO | ZEND_FETCH_CLASS_NO_AUTOLOAD));
}
static ZEND_COLD void zend_verify_arg_error(const zend_function *zf, uint32_t arg_num, const char *need_msg, const char *need_kind, const char *given_msg, const char *given_kind, zval *arg)
{
zend_execute_data *ptr = EG(current_execute_data)->prev_execute_data;
const char *fname = ZSTR_VAL(zf->common.function_name);
const char *fsep;
const char *fclass;
if (zf->common.scope) {
fsep = "::";
fclass = ZSTR_VAL(zf->common.scope->name);
} else {
fsep = "";
fclass = "";
}
if (zf->common.type == ZEND_USER_FUNCTION) {
if (ptr && ptr->func && ZEND_USER_CODE(ptr->func->common.type)) {
zend_type_error("Argument %d passed to %s%s%s() must %s%s, %s%s given, called in %s on line %d",
arg_num, fclass, fsep, fname, need_msg, need_kind, given_msg, given_kind,
ZSTR_VAL(ptr->func->op_array.filename), ptr->opline->lineno);
} else {
zend_type_error("Argument %d passed to %s%s%s() must %s%s, %s%s given", arg_num, fclass, fsep, fname, need_msg, need_kind, given_msg, given_kind);
}
} else {
zend_type_error("Argument %d passed to %s%s%s() must %s%s, %s%s given", arg_num, fclass, fsep, fname, need_msg, need_kind, given_msg, given_kind);
}
}
static int is_null_constant(zval *default_value)
{
if (Z_CONSTANT_P(default_value)) {
zval constant;
ZVAL_COPY_VALUE(&constant, default_value);
if (UNEXPECTED(zval_update_constant_ex(&constant, 0, NULL) != SUCCESS)) {
return 0;
}
if (Z_TYPE(constant) == IS_NULL) {
return 1;
}
zval_dtor(&constant);
}
return 0;
}
static zend_bool zend_verify_weak_scalar_type_hint(zend_uchar type_hint, zval *arg)
{
switch (type_hint) {
case _IS_BOOL: {
zend_bool dest;
if (!zend_parse_arg_bool_weak(arg, &dest)) {
return 0;
}
zval_ptr_dtor(arg);
ZVAL_BOOL(arg, dest);
return 1;
}
case IS_LONG: {
zend_long dest;
if (!zend_parse_arg_long_weak(arg, &dest)) {
return 0;
}
zval_ptr_dtor(arg);
ZVAL_LONG(arg, dest);
return 1;
}
case IS_DOUBLE: {
double dest;
if (!zend_parse_arg_double_weak(arg, &dest)) {
return 0;
}
zval_ptr_dtor(arg);
ZVAL_DOUBLE(arg, dest);
return 1;
}
case IS_STRING: {
zend_string *dest;
/* on success "arg" is converted to IS_STRING */
if (!zend_parse_arg_str_weak(arg, &dest)) {
return 0;
}
return 1;
}
default:
return 0;
}
}
static zend_bool zend_verify_scalar_type_hint(zend_uchar type_hint, zval *arg, zend_bool strict)
{
if (UNEXPECTED(strict)) {
/* SSTH Exception: IS_LONG may be accepted as IS_DOUBLE (converted) */
if (type_hint != IS_DOUBLE || Z_TYPE_P(arg) != IS_LONG) {
return 0;
}
} else if (UNEXPECTED(Z_TYPE_P(arg) == IS_NULL)) {
/* NULL may be accepted only by nullable hints (this is already checked) */
return 0;
}
return zend_verify_weak_scalar_type_hint(type_hint, arg);
}
static int zend_verify_internal_arg_type(zend_function *zf, uint32_t arg_num, zval *arg)
{
zend_internal_arg_info *cur_arg_info;
char *need_msg, *class_name;
zend_class_entry *ce;
if (EXPECTED(arg_num <= zf->internal_function.num_args)) {
cur_arg_info = &zf->internal_function.arg_info[arg_num-1];
} else if (zf->internal_function.fn_flags & ZEND_ACC_VARIADIC) {
cur_arg_info = &zf->internal_function.arg_info[zf->internal_function.num_args];
} else {
return 1;
}
if (cur_arg_info->type_hint) {
ZVAL_DEREF(arg);
if (EXPECTED(cur_arg_info->type_hint == Z_TYPE_P(arg))) {
if (cur_arg_info->class_name) {
need_msg = zend_verify_internal_arg_class_kind((zend_internal_arg_info*)cur_arg_info, &class_name, &ce);
if (!ce || !instanceof_function(Z_OBJCE_P(arg), ce)) {
zend_verify_arg_error(zf, arg_num, need_msg, class_name, "instance of ", ZSTR_VAL(Z_OBJCE_P(arg)->name), arg);
return 0;
}
}
} else if (Z_TYPE_P(arg) != IS_NULL || !cur_arg_info->allow_null) {
if (cur_arg_info->class_name) {
need_msg = zend_verify_internal_arg_class_kind((zend_internal_arg_info*)cur_arg_info, &class_name, &ce);
zend_verify_arg_error(zf, arg_num, need_msg, class_name, zend_zval_type_name(arg), "", arg);
return 0;
} else if (cur_arg_info->type_hint == IS_CALLABLE) {
if (!zend_is_callable(arg, IS_CALLABLE_CHECK_SILENT, NULL)) {
zend_verify_arg_error(zf, arg_num, "be callable", "", zend_zval_type_name(arg), "", arg);
return 0;
}
} else if (cur_arg_info->type_hint == _IS_BOOL &&
EXPECTED(Z_TYPE_P(arg) == IS_FALSE || Z_TYPE_P(arg) == IS_TRUE)) {
/* pass */
} else if (UNEXPECTED(!zend_verify_scalar_type_hint(cur_arg_info->type_hint, arg, ZEND_CALL_USES_STRICT_TYPES(EG(current_execute_data))))) {
zend_verify_arg_error(zf, arg_num, "be of the type ", zend_get_type_by_const(cur_arg_info->type_hint), zend_zval_type_name(arg), "", arg);
return 0;
}
}
}
return 1;
}
static zend_never_inline int zend_verify_internal_arg_types(zend_function *fbc, zend_execute_data *call)
{
uint32_t i;
uint32_t num_args = ZEND_CALL_NUM_ARGS(call);
zval *p = ZEND_CALL_ARG(call, 1);
for (i = 0; i < num_args; ++i) {
if (UNEXPECTED(!zend_verify_internal_arg_type(fbc, i + 1, p))) {
EG(current_execute_data) = call->prev_execute_data;
zend_vm_stack_free_args(call);
return 0;
}
p++;
}
return 1;
}
static zend_always_inline int zend_verify_arg_type(zend_function *zf, uint32_t arg_num, zval *arg, zval *default_value, void **cache_slot)
{
zend_arg_info *cur_arg_info;
char *need_msg;
zend_class_entry *ce;
if (EXPECTED(arg_num <= zf->common.num_args)) {
cur_arg_info = &zf->common.arg_info[arg_num-1];
} else if (UNEXPECTED(zf->common.fn_flags & ZEND_ACC_VARIADIC)) {
cur_arg_info = &zf->common.arg_info[zf->common.num_args];
} else {
return 1;
}
if (cur_arg_info->type_hint) {
ZVAL_DEREF(arg);
if (EXPECTED(cur_arg_info->type_hint == Z_TYPE_P(arg))) {
if (cur_arg_info->class_name) {
if (EXPECTED(*cache_slot)) {
ce = (zend_class_entry*)*cache_slot;
} else {
ce = zend_verify_arg_class_kind(cur_arg_info);
if (UNEXPECTED(!ce)) {
zend_verify_arg_error(zf, arg_num, "be an instance of ", ZSTR_VAL(cur_arg_info->class_name), "instance of ", ZSTR_VAL(Z_OBJCE_P(arg)->name), arg);
return 0;
}
*cache_slot = (void*)ce;
}
if (UNEXPECTED(!instanceof_function(Z_OBJCE_P(arg), ce))) {
need_msg =
(ce->ce_flags & ZEND_ACC_INTERFACE) ?
"implement interface " : "be an instance of ";
zend_verify_arg_error(zf, arg_num, need_msg, ZSTR_VAL(ce->name), "instance of ", ZSTR_VAL(Z_OBJCE_P(arg)->name), arg);
return 0;
}
}
} else if (Z_TYPE_P(arg) != IS_NULL || !(cur_arg_info->allow_null || (default_value && is_null_constant(default_value)))) {
if (cur_arg_info->class_name) {
if (EXPECTED(*cache_slot)) {
ce = (zend_class_entry*)*cache_slot;
} else {
ce = zend_verify_arg_class_kind(cur_arg_info);
if (UNEXPECTED(!ce)) {
if (Z_TYPE_P(arg) == IS_OBJECT) {
zend_verify_arg_error(zf, arg_num, "be an instance of ", ZSTR_VAL(cur_arg_info->class_name), "instance of ", ZSTR_VAL(Z_OBJCE_P(arg)->name), arg);
} else {
zend_verify_arg_error(zf, arg_num, "be an instance of ", ZSTR_VAL(cur_arg_info->class_name), "", zend_zval_type_name(arg), arg);
}
return 0;
}
*cache_slot = (void*)ce;
}
need_msg =
(ce->ce_flags & ZEND_ACC_INTERFACE) ?
"implement interface " : "be an instance of ";
zend_verify_arg_error(zf, arg_num, need_msg, ZSTR_VAL(ce->name), zend_zval_type_name(arg), "", arg);
return 0;
} else if (cur_arg_info->type_hint == IS_CALLABLE) {
if (!zend_is_callable(arg, IS_CALLABLE_CHECK_SILENT, NULL)) {
zend_verify_arg_error(zf, arg_num, "be callable", "", zend_zval_type_name(arg), "", arg);
return 0;
}
} else if (cur_arg_info->type_hint == _IS_BOOL &&
EXPECTED(Z_TYPE_P(arg) == IS_FALSE || Z_TYPE_P(arg) == IS_TRUE)) {
/* pass */
} else if (UNEXPECTED(!zend_verify_scalar_type_hint(cur_arg_info->type_hint, arg, ZEND_ARG_USES_STRICT_TYPES()))) {
zend_verify_arg_error(zf, arg_num, "be of the type ", zend_get_type_by_const(cur_arg_info->type_hint), zend_zval_type_name(arg), "", arg);
return 0;
}
}
}
return 1;
}
static zend_always_inline int zend_verify_missing_arg_type(zend_function *zf, uint32_t arg_num, void **cache_slot)
{
zend_arg_info *cur_arg_info;
char *need_msg;
zend_class_entry *ce;
if (EXPECTED(arg_num <= zf->common.num_args)) {
cur_arg_info = &zf->common.arg_info[arg_num-1];
} else if (UNEXPECTED(zf->common.fn_flags & ZEND_ACC_VARIADIC)) {
cur_arg_info = &zf->common.arg_info[zf->common.num_args];
} else {
return 1;
}
if (cur_arg_info->type_hint) {
if (cur_arg_info->class_name) {
if (EXPECTED(*cache_slot)) {
ce = (zend_class_entry*)*cache_slot;
} else {
ce = zend_verify_arg_class_kind(cur_arg_info);
if (UNEXPECTED(!ce)) {
zend_verify_arg_error(zf, arg_num, "be an instance of ", ZSTR_VAL(cur_arg_info->class_name), "none", "", NULL);
return 0;
}
*cache_slot = (void*)ce;
}
need_msg =
(ce->ce_flags & ZEND_ACC_INTERFACE) ?
"implement interface " : "be an instance of ";
zend_verify_arg_error(zf, arg_num, need_msg, ZSTR_VAL(ce->name), "none", "", NULL);
} else if (cur_arg_info->type_hint == IS_CALLABLE) {
zend_verify_arg_error(zf, arg_num, "be callable", "", "none", "", NULL);
} else {
zend_verify_arg_error(zf, arg_num, "be of the type ", zend_get_type_by_const(cur_arg_info->type_hint), "none", "", NULL);
}
return 0;
}
return 1;
}
static ZEND_COLD void zend_verify_missing_arg(zend_execute_data *execute_data, uint32_t arg_num, void **cache_slot)
{
if (EXPECTED(!(EX(func)->common.fn_flags & ZEND_ACC_HAS_TYPE_HINTS)) ||
UNEXPECTED(zend_verify_missing_arg_type(EX(func), arg_num, cache_slot))) {
const char *class_name = EX(func)->common.scope ? ZSTR_VAL(EX(func)->common.scope->name) : "";
const char *space = EX(func)->common.scope ? "::" : "";
const char *func_name = EX(func)->common.function_name ? ZSTR_VAL(EX(func)->common.function_name) : "main";
zend_execute_data *ptr = EX(prev_execute_data);
if (ptr && ptr->func && ZEND_USER_CODE(ptr->func->common.type)) {
zend_error(E_WARNING, "Missing argument %u for %s%s%s(), called in %s on line %d and defined", arg_num, class_name, space, func_name, ZSTR_VAL(ptr->func->op_array.filename), ptr->opline->lineno);
} else {
zend_error(E_WARNING, "Missing argument %u for %s%s%s()", arg_num, class_name, space, func_name);
}
}
}
static ZEND_COLD void zend_verify_return_error(const zend_function *zf, const char *need_msg, const char *need_kind, const char *returned_msg, const char *returned_kind)
{
const char *fname = ZSTR_VAL(zf->common.function_name);
const char *fsep;
const char *fclass;
if (zf->common.scope) {
fsep = "::";
fclass = ZSTR_VAL(zf->common.scope->name);
} else {
fsep = "";
fclass = "";
}
zend_type_error("Return value of %s%s%s() must %s%s, %s%s returned",
fclass, fsep, fname, need_msg, need_kind, returned_msg, returned_kind);
}
static ZEND_COLD void zend_verify_internal_return_error(const zend_function *zf, const char *need_msg, const char *need_kind, const char *returned_msg, const char *returned_kind)
{
const char *fname = ZSTR_VAL(zf->common.function_name);
const char *fsep;
const char *fclass;
if (zf->common.scope) {
fsep = "::";
fclass = ZSTR_VAL(zf->common.scope->name);
} else {
fsep = "";
fclass = "";
}
zend_error_noreturn(E_CORE_ERROR, "Return value of %s%s%s() must %s%s, %s%s returned",
fclass, fsep, fname, need_msg, need_kind, returned_msg, returned_kind);
}
static ZEND_COLD void zend_verify_void_return_error(const zend_function *zf, const char *returned_msg, const char *returned_kind)
{
const char *fname = ZSTR_VAL(zf->common.function_name);
const char *fsep;
const char *fclass;
if (zf->common.scope) {
fsep = "::";
fclass = ZSTR_VAL(zf->common.scope->name);
} else {
fsep = "";
fclass = "";
}
zend_type_error("%s%s%s() must not return a value, %s%s returned",
fclass, fsep, fname, returned_msg, returned_kind);
}
#if ZEND_DEBUG
static int zend_verify_internal_return_type(zend_function *zf, zval *ret)
{
zend_arg_info *ret_info = zf->common.arg_info - 1;
char *need_msg, *class_name;
zend_class_entry *ce;
if (ret_info->type_hint) {
if (EXPECTED(ret_info->type_hint == Z_TYPE_P(ret))) {
if (ret_info->class_name) {
need_msg = zend_verify_internal_arg_class_kind((zend_internal_arg_info *)ret_info, &class_name, &ce);
if (!ce || !instanceof_function(Z_OBJCE_P(ret), ce)) {
zend_verify_internal_return_error(zf, need_msg, class_name, "instance of ", ZSTR_VAL(Z_OBJCE_P(ret)->name));
return 0;
}
}
} else if (Z_TYPE_P(ret) != IS_NULL || !ret_info->allow_null) {
if (ret_info->class_name) {
need_msg = zend_verify_internal_arg_class_kind((zend_internal_arg_info *)ret_info, &class_name, &ce);
zend_verify_internal_return_error(zf, need_msg, class_name, zend_zval_type_name(ret), "");
} else if (ret_info->type_hint == IS_CALLABLE) {
if (!zend_is_callable(ret, IS_CALLABLE_CHECK_SILENT, NULL) && (Z_TYPE_P(ret) != IS_NULL || !ret_info->allow_null)) {
zend_verify_internal_return_error(zf, "be callable", "", zend_zval_type_name(ret), "");
return 0;
}
} else if (ret_info->type_hint == _IS_BOOL &&
EXPECTED(Z_TYPE_P(ret) == IS_FALSE || Z_TYPE_P(ret) == IS_TRUE)) {
/* pass */
} else if (ret_info->type_hint == IS_VOID) {
zend_verify_void_return_error(zf, zend_zval_type_name(ret), "");
} else {
/* Use strict check to verify return value of internal function */
zend_verify_internal_return_error(zf, "be of the type ", zend_get_type_by_const(ret_info->type_hint), zend_zval_type_name(ret), "");
return 0;
}
}
}
return 1;
}
#endif
static zend_always_inline void zend_verify_return_type(zend_function *zf, zval *ret, void **cache_slot)
{
zend_arg_info *ret_info = zf->common.arg_info - 1;
char *need_msg;
zend_class_entry *ce;
if (ret_info->type_hint) {
if (EXPECTED(ret_info->type_hint == Z_TYPE_P(ret))) {
if (ret_info->class_name) {
if (EXPECTED(*cache_slot)) {
ce = (zend_class_entry*)*cache_slot;
} else {
ce = zend_verify_arg_class_kind(ret_info);
if (UNEXPECTED(!ce)) {
zend_verify_return_error(zf, "be an instance of ", ZSTR_VAL(ret_info->class_name), "instance of ", ZSTR_VAL(Z_OBJCE_P(ret)->name));
return;
}
*cache_slot = (void*)ce;
}
if (UNEXPECTED(!instanceof_function(Z_OBJCE_P(ret), ce))) {
need_msg =
(ce->ce_flags & ZEND_ACC_INTERFACE) ?
"implement interface " : "be an instance of ";
zend_verify_return_error(zf, need_msg, ZSTR_VAL(ce->name), "instance of ", ZSTR_VAL(Z_OBJCE_P(ret)->name));
}
}
} else if (Z_TYPE_P(ret) != IS_NULL || !ret_info->allow_null) {
if (ret_info->class_name) {
if (EXPECTED(*cache_slot)) {
ce = (zend_class_entry*)*cache_slot;
} else {
ce = zend_verify_arg_class_kind(ret_info);
if (UNEXPECTED(!ce)) {
zend_verify_return_error(zf, "be an instance of ", ZSTR_VAL(ret_info->class_name), zend_zval_type_name(ret), "");
return;
}
*cache_slot = (void*)ce;
}
need_msg =
(ce->ce_flags & ZEND_ACC_INTERFACE) ?
"implement interface " : "be an instance of ";
zend_verify_return_error(zf, need_msg, ZSTR_VAL(ce->name), zend_zval_type_name(ret), "");
} else if (ret_info->type_hint == IS_CALLABLE) {
if (!zend_is_callable(ret, IS_CALLABLE_CHECK_SILENT, NULL)) {
zend_verify_return_error(zf, "be callable", "", zend_zval_type_name(ret), "");
}
} else if (ret_info->type_hint == _IS_BOOL &&
EXPECTED(Z_TYPE_P(ret) == IS_FALSE || Z_TYPE_P(ret) == IS_TRUE)) {
/* pass */
/* There would be a check here for the IS_VOID type hint, which
* would trigger an error because a value had been returned.
* However, zend_compile.c already does a compile-time check
* that bans `return ...;` within a void function. Thus we can skip
* this part of the runtime check for non-internal functions.
*/
} else if (UNEXPECTED(!zend_verify_scalar_type_hint(ret_info->type_hint, ret, ZEND_RET_USES_STRICT_TYPES()))) {
zend_verify_return_error(zf, "be of the type ", zend_get_type_by_const(ret_info->type_hint), zend_zval_type_name(ret), "");
}
}
}
}
static ZEND_COLD int zend_verify_missing_return_type(zend_function *zf, void **cache_slot)
{
zend_arg_info *ret_info = zf->common.arg_info - 1;
char *need_msg;
zend_class_entry *ce;
if (ret_info->type_hint && EXPECTED(ret_info->type_hint != IS_VOID)) {
if (ret_info->class_name) {
if (EXPECTED(*cache_slot)) {
ce = (zend_class_entry*)*cache_slot;
} else {
ce = zend_verify_arg_class_kind(ret_info);
if (UNEXPECTED(!ce)) {
zend_verify_return_error(zf, "be an instance of ", ZSTR_VAL(ret_info->class_name), "none", "");
return 0;
}
*cache_slot = (void*)ce;
}
need_msg =
(ce->ce_flags & ZEND_ACC_INTERFACE) ?
"implement interface " : "be an instance of ";
zend_verify_return_error(zf, need_msg, ZSTR_VAL(ce->name), "none", "");
return 0;
} else if (ret_info->type_hint == IS_CALLABLE) {
zend_verify_return_error(zf, "be callable", "", "none", "");
} else {
zend_verify_return_error(zf, "be of the type ", zend_get_type_by_const(ret_info->type_hint), "none", "");
}
return 0;
}
return 1;
}
static zend_never_inline void zend_assign_to_object_dim(zval *object, zval *dim, zval *value)
{
if (UNEXPECTED(!Z_OBJ_HT_P(object)->write_dimension)) {
zend_throw_error(NULL, "Cannot use object as array");
return;
}
Z_OBJ_HT_P(object)->write_dimension(object, dim, value);
}
static zend_never_inline void zend_binary_assign_op_obj_dim(zval *object, zval *property, zval *value, zval *retval, binary_op_type binary_op)
{
zval *z;
zval rv, res;
if (Z_OBJ_HT_P(object)->read_dimension &&
(z = Z_OBJ_HT_P(object)->read_dimension(object, property, BP_VAR_R, &rv)) != NULL) {
if (Z_TYPE_P(z) == IS_OBJECT && Z_OBJ_HT_P(z)->get) {
zval rv2;
zval *value = Z_OBJ_HT_P(z)->get(z, &rv2);
if (z == &rv) {
zval_ptr_dtor(&rv);
}
ZVAL_COPY_VALUE(z, value);
}
binary_op(&res, Z_ISREF_P(z) ? Z_REFVAL_P(z) : z, value);
Z_OBJ_HT_P(object)->write_dimension(object, property, &res);
if (z == &rv) {
zval_ptr_dtor(&rv);
}
if (retval) {
ZVAL_COPY(retval, &res);
}
zval_ptr_dtor(&res);
} else {
zend_error(E_WARNING, "Attempt to assign property of non-object");
if (retval) {
ZVAL_NULL(retval);
}
}
}
static zend_never_inline zend_long zend_check_string_offset(zval *dim, int type)
{
zend_long offset;
try_again:
if (UNEXPECTED(Z_TYPE_P(dim) != IS_LONG)) {
switch(Z_TYPE_P(dim)) {
case IS_STRING:
if (IS_LONG == is_numeric_string(Z_STRVAL_P(dim), Z_STRLEN_P(dim), NULL, NULL, -1)) {
break;
}
if (type != BP_VAR_UNSET) {
zend_error(E_WARNING, "Illegal string offset '%s'", Z_STRVAL_P(dim));
}
break;
case IS_UNDEF:
zval_undefined_cv(EG(current_execute_data)->opline->op2.var, EG(current_execute_data));
case IS_DOUBLE:
case IS_NULL:
case IS_FALSE:
case IS_TRUE:
zend_error(E_NOTICE, "String offset cast occurred");
break;
case IS_REFERENCE:
dim = Z_REFVAL_P(dim);
goto try_again;
default:
zend_error(E_WARNING, "Illegal offset type");
break;
}
offset = _zval_get_long_func(dim);
} else {
offset = Z_LVAL_P(dim);
}
return offset;
}
static zend_never_inline ZEND_COLD void zend_wrong_string_offset(void)
{
const char *msg = NULL;
const zend_op *opline = EG(current_execute_data)->opline;
const zend_op *end;
uint32_t var;
switch (opline->opcode) {
case ZEND_ASSIGN_ADD:
case ZEND_ASSIGN_SUB:
case ZEND_ASSIGN_MUL:
case ZEND_ASSIGN_DIV:
case ZEND_ASSIGN_MOD:
case ZEND_ASSIGN_SL:
case ZEND_ASSIGN_SR:
case ZEND_ASSIGN_CONCAT:
case ZEND_ASSIGN_BW_OR:
case ZEND_ASSIGN_BW_AND:
case ZEND_ASSIGN_BW_XOR:
case ZEND_ASSIGN_POW:
msg = "Cannot use assign-op operators with string offsets";
break;
case ZEND_FETCH_DIM_W:
case ZEND_FETCH_DIM_RW:
case ZEND_FETCH_DIM_FUNC_ARG:
case ZEND_FETCH_DIM_UNSET:
/* TODO: Encode the "reason" into opline->extended_value??? */
var = opline->result.var;
opline++;
end = EG(current_execute_data)->func->op_array.opcodes +
EG(current_execute_data)->func->op_array.last;
while (opline < end) {
if (opline->op1_type == IS_VAR && opline->op1.var == var) {
switch (opline->opcode) {
case ZEND_ASSIGN_ADD:
case ZEND_ASSIGN_SUB:
case ZEND_ASSIGN_MUL:
case ZEND_ASSIGN_DIV:
case ZEND_ASSIGN_MOD:
case ZEND_ASSIGN_SL:
case ZEND_ASSIGN_SR:
case ZEND_ASSIGN_CONCAT:
case ZEND_ASSIGN_BW_OR:
case ZEND_ASSIGN_BW_AND:
case ZEND_ASSIGN_BW_XOR:
case ZEND_ASSIGN_POW:
if (opline->extended_value == ZEND_ASSIGN_OBJ) {
msg = "Cannot use string offset as an object";
} else if (opline->extended_value == ZEND_ASSIGN_DIM) {
msg = "Cannot use string offset as an array";
} else {
msg = "Cannot use assign-op operators with string offsets";
}
break;
case ZEND_PRE_INC_OBJ:
case ZEND_PRE_DEC_OBJ:
case ZEND_POST_INC_OBJ:
case ZEND_POST_DEC_OBJ:
case ZEND_PRE_INC:
case ZEND_PRE_DEC:
case ZEND_POST_INC:
case ZEND_POST_DEC:
msg = "Cannot increment/decrement string offsets";
break;
case ZEND_FETCH_DIM_W:
case ZEND_FETCH_DIM_RW:
case ZEND_FETCH_DIM_FUNC_ARG:
case ZEND_FETCH_DIM_UNSET:
case ZEND_ASSIGN_DIM:
msg = "Cannot use string offset as an array";
break;
case ZEND_FETCH_OBJ_W:
case ZEND_FETCH_OBJ_RW:
case ZEND_FETCH_OBJ_FUNC_ARG:
case ZEND_FETCH_OBJ_UNSET:
case ZEND_ASSIGN_OBJ:
msg = "Cannot use string offset as an object";
break;
case ZEND_ASSIGN_REF:
case ZEND_ADD_ARRAY_ELEMENT:
case ZEND_INIT_ARRAY:
msg = "Cannot create references to/from string offsets";
break;
case ZEND_RETURN_BY_REF:
msg = "Cannot return string offsets by reference";
break;
case ZEND_UNSET_DIM:
case ZEND_UNSET_OBJ:
msg = "Cannot unset string offsets";
break;
case ZEND_YIELD:
msg = "Cannot yield string offsets by reference";
break;
case ZEND_SEND_REF:
case ZEND_SEND_VAR_EX:
msg = "Only variables can be passed by reference";
break;
EMPTY_SWITCH_DEFAULT_CASE();
}
break;
}
if (opline->op2_type == IS_VAR && opline->op2.var == var) {
ZEND_ASSERT(opline->opcode == ZEND_ASSIGN_REF);
msg = "Cannot create references to/from string offsets";
break;
}
}
break;
EMPTY_SWITCH_DEFAULT_CASE();
}
ZEND_ASSERT(msg != NULL);
zend_throw_error(NULL, msg);
}
static zend_never_inline void zend_assign_to_string_offset(zval *str, zval *dim, zval *value, zval *result)
{
zend_string *old_str;
zend_uchar c;
size_t string_len;
zend_long offset;
offset = zend_check_string_offset(dim, BP_VAR_W);
if (offset < (zend_long)(-Z_STRLEN_P(str))) {
/* Error on negative offset */
zend_error(E_WARNING, "Illegal string offset: " ZEND_LONG_FMT, offset);
if (result) {
ZVAL_NULL(result);
}
return;
}
if (Z_TYPE_P(value) != IS_STRING) {
/* Convert to string, just the time to pick the 1st byte */
zend_string *tmp = zval_get_string(value);
string_len = ZSTR_LEN(tmp);
c = (zend_uchar)ZSTR_VAL(tmp)[0];
zend_string_release(tmp);
} else {
string_len = Z_STRLEN_P(value);
c = (zend_uchar)Z_STRVAL_P(value)[0];
}
if (string_len == 0) {
/* Error on empty input string */
zend_error(E_WARNING, "Cannot assign an empty string to a string offset");
if (result) {
ZVAL_NULL(result);
}
return;
}
if (offset < 0) { /* Handle negative offset */
offset += (zend_long)Z_STRLEN_P(str);
}
if ((size_t)offset >= Z_STRLEN_P(str)) {
/* Extend string if needed */
zend_long old_len = Z_STRLEN_P(str);
Z_STR_P(str) = zend_string_extend(Z_STR_P(str), offset + 1, 0);
Z_TYPE_INFO_P(str) = IS_STRING_EX;
memset(Z_STRVAL_P(str) + old_len, ' ', offset - old_len);
Z_STRVAL_P(str)[offset+1] = 0;
} else if (!Z_REFCOUNTED_P(str)) {
old_str = Z_STR_P(str);
Z_STR_P(str) = zend_string_init(Z_STRVAL_P(str), Z_STRLEN_P(str), 0);
Z_TYPE_INFO_P(str) = IS_STRING_EX;
zend_string_release(old_str);
} else {
SEPARATE_STRING(str);
}
Z_STRVAL_P(str)[offset] = c;
if (result) {
/* Return the new character */
if (CG(one_char_string)[c]) {
ZVAL_INTERNED_STR(result, CG(one_char_string)[c]);
} else {
ZVAL_NEW_STR(result, zend_string_init(Z_STRVAL_P(str) + offset, 1, 0));
}
}
}
static zend_never_inline void zend_post_incdec_overloaded_property(zval *object, zval *property, void **cache_slot, int inc, zval *result)
{
if (Z_OBJ_HT_P(object)->read_property && Z_OBJ_HT_P(object)->write_property) {
zval rv, obj;
zval *z;
zval z_copy;
ZVAL_OBJ(&obj, Z_OBJ_P(object));
Z_ADDREF(obj);
z = Z_OBJ_HT(obj)->read_property(&obj, property, BP_VAR_R, cache_slot, &rv);
if (UNEXPECTED(EG(exception))) {
OBJ_RELEASE(Z_OBJ(obj));
return;
}
if (UNEXPECTED(Z_TYPE_P(z) == IS_OBJECT) && Z_OBJ_HT_P(z)->get) {
zval rv2;
zval *value = Z_OBJ_HT_P(z)->get(z, &rv2);
if (z == &rv) {
zval_ptr_dtor(&rv);
}
ZVAL_COPY_VALUE(z, value);
}
if (UNEXPECTED(Z_TYPE_P(z) == IS_REFERENCE)) {
ZVAL_COPY(result, Z_REFVAL_P(z));
} else {
ZVAL_COPY(result, z);
}
ZVAL_DUP(&z_copy, result);
if (inc) {
increment_function(&z_copy);
} else {
decrement_function(&z_copy);
}
Z_OBJ_HT(obj)->write_property(&obj, property, &z_copy, cache_slot);
OBJ_RELEASE(Z_OBJ(obj));
zval_ptr_dtor(&z_copy);
zval_ptr_dtor(z);
} else {
zend_error(E_WARNING, "Attempt to increment/decrement property of non-object");
ZVAL_NULL(result);
}
}
static zend_never_inline void zend_pre_incdec_overloaded_property(zval *object, zval *property, void **cache_slot, int inc, zval *result)
{
zval rv;
if (Z_OBJ_HT_P(object)->read_property && Z_OBJ_HT_P(object)->write_property) {
zval *z, obj;
ZVAL_OBJ(&obj, Z_OBJ_P(object));
Z_ADDREF(obj);
z = Z_OBJ_HT(obj)->read_property(&obj, property, BP_VAR_R, cache_slot, &rv);
if (UNEXPECTED(EG(exception))) {
OBJ_RELEASE(Z_OBJ(obj));
return;
}
if (UNEXPECTED(Z_TYPE_P(z) == IS_OBJECT) && Z_OBJ_HT_P(z)->get) {
zval rv2;
zval *value = Z_OBJ_HT_P(z)->get(z, &rv2);
if (z == &rv) {
zval_ptr_dtor(&rv);
}
ZVAL_COPY_VALUE(z, value);
}
ZVAL_DEREF(z);
SEPARATE_ZVAL_NOREF(z);
if (inc) {
increment_function(z);
} else {
decrement_function(z);
}
if (UNEXPECTED(result)) {
ZVAL_COPY(result, z);
}
Z_OBJ_HT(obj)->write_property(&obj, property, z, cache_slot);
OBJ_RELEASE(Z_OBJ(obj));
zval_ptr_dtor(z);
} else {
zend_error(E_WARNING, "Attempt to increment/decrement property of non-object");
if (UNEXPECTED(result)) {
ZVAL_NULL(result);
}
}
}
static zend_never_inline void zend_assign_op_overloaded_property(zval *object, zval *property, void **cache_slot, zval *value, binary_op_type binary_op, zval *result)
{
zval *z;
zval rv, obj;
zval *zptr;
ZVAL_OBJ(&obj, Z_OBJ_P(object));
Z_ADDREF(obj);
if (EXPECTED(Z_OBJ_HT(obj)->read_property)) {
z = Z_OBJ_HT(obj)->read_property(&obj, property, BP_VAR_R, cache_slot, &rv);
if (UNEXPECTED(EG(exception))) {
OBJ_RELEASE(Z_OBJ(obj));
return;
}
if (Z_TYPE_P(z) == IS_OBJECT && Z_OBJ_HT_P(z)->get) {
zval rv2;
zval *value = Z_OBJ_HT_P(z)->get(z, &rv2);
if (z == &rv) {
zval_ptr_dtor(&rv);
}
ZVAL_COPY_VALUE(z, value);
}
zptr = z;
ZVAL_DEREF(z);
SEPARATE_ZVAL_NOREF(z);
binary_op(z, z, value);
Z_OBJ_HT(obj)->write_property(&obj, property, z, cache_slot);
if (UNEXPECTED(result)) {
ZVAL_COPY(result, z);
}
zval_ptr_dtor(zptr);
} else {
zend_error(E_WARNING, "Attempt to assign property of non-object");
if (UNEXPECTED(result)) {
ZVAL_NULL(result);
}
}
OBJ_RELEASE(Z_OBJ(obj));
}
/* Utility Functions for Extensions */
static void zend_extension_statement_handler(const zend_extension *extension, zend_op_array *op_array)
{
if (extension->statement_handler) {
extension->statement_handler(op_array);
}
}
static void zend_extension_fcall_begin_handler(const zend_extension *extension, zend_op_array *op_array)
{
if (extension->fcall_begin_handler) {
extension->fcall_begin_handler(op_array);
}
}
static void zend_extension_fcall_end_handler(const zend_extension *extension, zend_op_array *op_array)
{
if (extension->fcall_end_handler) {
extension->fcall_end_handler(op_array);
}
}
static zend_always_inline HashTable *zend_get_target_symbol_table(zend_execute_data *execute_data, int fetch_type)
{
HashTable *ht;
if (EXPECTED(fetch_type == ZEND_FETCH_GLOBAL_LOCK) ||
EXPECTED(fetch_type == ZEND_FETCH_GLOBAL)) {
ht = &EG(symbol_table);
} else {
ZEND_ASSERT(fetch_type == ZEND_FETCH_LOCAL);
if (!EX(symbol_table)) {
zend_rebuild_symbol_table();
}
ht = EX(symbol_table);
}
return ht;
}
static zend_always_inline zval *zend_fetch_dimension_address_inner(HashTable *ht, const zval *dim, int dim_type, int type)
{
zval *retval;
zend_string *offset_key;
zend_ulong hval;
try_again:
if (EXPECTED(Z_TYPE_P(dim) == IS_LONG)) {
hval = Z_LVAL_P(dim);
num_index:
retval = zend_hash_index_find(ht, hval);
if (retval == NULL) {
switch (type) {
case BP_VAR_R:
zend_error(E_NOTICE,"Undefined offset: " ZEND_LONG_FMT, hval);
/* break missing intentionally */
case BP_VAR_UNSET:
case BP_VAR_IS:
retval = &EG(uninitialized_zval);
break;
case BP_VAR_RW:
zend_error(E_NOTICE,"Undefined offset: " ZEND_LONG_FMT, hval);
retval = zend_hash_index_update(ht, hval, &EG(uninitialized_zval));
break;
case BP_VAR_W:
retval = zend_hash_index_add_new(ht, hval, &EG(uninitialized_zval));
break;
}
}
} else if (EXPECTED(Z_TYPE_P(dim) == IS_STRING)) {
offset_key = Z_STR_P(dim);
if (dim_type != IS_CONST) {
if (ZEND_HANDLE_NUMERIC(offset_key, hval)) {
goto num_index;
}
}
str_index:
retval = zend_hash_find(ht, offset_key);
if (retval) {
/* support for $GLOBALS[...] */
if (UNEXPECTED(Z_TYPE_P(retval) == IS_INDIRECT)) {
retval = Z_INDIRECT_P(retval);
if (UNEXPECTED(Z_TYPE_P(retval) == IS_UNDEF)) {
switch (type) {
case BP_VAR_R:
zend_error(E_NOTICE, "Undefined index: %s", ZSTR_VAL(offset_key));
/* break missing intentionally */
case BP_VAR_UNSET:
case BP_VAR_IS:
retval = &EG(uninitialized_zval);
break;
case BP_VAR_RW:
zend_error(E_NOTICE,"Undefined index: %s", ZSTR_VAL(offset_key));
/* break missing intentionally */
case BP_VAR_W:
ZVAL_NULL(retval);
break;
}
}
}
} else {
switch (type) {
case BP_VAR_R:
zend_error(E_NOTICE, "Undefined index: %s", ZSTR_VAL(offset_key));
/* break missing intentionally */
case BP_VAR_UNSET:
case BP_VAR_IS:
retval = &EG(uninitialized_zval);
break;
case BP_VAR_RW:
zend_error(E_NOTICE,"Undefined index: %s", ZSTR_VAL(offset_key));
retval = zend_hash_update(ht, offset_key, &EG(uninitialized_zval));
break;
case BP_VAR_W:
retval = zend_hash_add_new(ht, offset_key, &EG(uninitialized_zval));
break;
}
}
} else {
switch (Z_TYPE_P(dim)) {
case IS_UNDEF:
zval_undefined_cv(EG(current_execute_data)->opline->op2.var, EG(current_execute_data));
/* break missing intentionally */
case IS_NULL:
offset_key = ZSTR_EMPTY_ALLOC();
goto str_index;
case IS_DOUBLE:
hval = zend_dval_to_lval(Z_DVAL_P(dim));
goto num_index;
case IS_RESOURCE:
zend_error(E_NOTICE, "Resource ID#%pd used as offset, casting to integer (%pd)", Z_RES_HANDLE_P(dim), Z_RES_HANDLE_P(dim));
hval = Z_RES_HANDLE_P(dim);
goto num_index;
case IS_FALSE:
hval = 0;
goto num_index;
case IS_TRUE:
hval = 1;
goto num_index;
case IS_REFERENCE:
dim = Z_REFVAL_P(dim);
goto try_again;
default:
zend_error(E_WARNING, "Illegal offset type");
retval = (type == BP_VAR_W || type == BP_VAR_RW) ?
NULL : &EG(uninitialized_zval);
}
}
return retval;
}
static zend_never_inline zval* ZEND_FASTCALL zend_fetch_dimension_address_inner_W(HashTable *ht, const zval *dim)
{
return zend_fetch_dimension_address_inner(ht, dim, IS_TMP_VAR, BP_VAR_W);
}
static zend_never_inline zval* ZEND_FASTCALL zend_fetch_dimension_address_inner_W_CONST(HashTable *ht, const zval *dim)
{
return zend_fetch_dimension_address_inner(ht, dim, IS_CONST, BP_VAR_W);
}
static zend_never_inline zval* ZEND_FASTCALL zend_fetch_dimension_address_inner_RW(HashTable *ht, const zval *dim)
{
return zend_fetch_dimension_address_inner(ht, dim, IS_TMP_VAR, BP_VAR_RW);
}
static zend_never_inline zval* ZEND_FASTCALL zend_fetch_dimension_address_inner_RW_CONST(HashTable *ht, const zval *dim)
{
return zend_fetch_dimension_address_inner(ht, dim, IS_CONST, BP_VAR_RW);
}
static zend_always_inline void zend_fetch_dimension_address(zval *result, zval *container, zval *dim, int dim_type, int type)
{
zval *retval;
if (EXPECTED(Z_TYPE_P(container) == IS_ARRAY)) {
try_array:
SEPARATE_ARRAY(container);
fetch_from_array:
if (dim == NULL) {
retval = zend_hash_next_index_insert(Z_ARRVAL_P(container), &EG(uninitialized_zval));
if (UNEXPECTED(retval == NULL)) {
zend_error(E_WARNING, "Cannot add element to the array as the next element is already occupied");
ZVAL_ERROR(result);
return;
}
} else {
retval = zend_fetch_dimension_address_inner(Z_ARRVAL_P(container), dim, dim_type, type);
if (UNEXPECTED(!retval)) {
ZVAL_ERROR(result);
return;
}
}
ZVAL_INDIRECT(result, retval);
return;
} else if (EXPECTED(Z_TYPE_P(container) == IS_REFERENCE)) {
container = Z_REFVAL_P(container);
if (EXPECTED(Z_TYPE_P(container) == IS_ARRAY)) {
goto try_array;
}
}
if (EXPECTED(Z_TYPE_P(container) == IS_STRING)) {
if (type != BP_VAR_UNSET && UNEXPECTED(Z_STRLEN_P(container) == 0)) {
zval_ptr_dtor_nogc(container);
convert_to_array:
ZVAL_NEW_ARR(container);
zend_hash_init(Z_ARRVAL_P(container), 8, NULL, ZVAL_PTR_DTOR, 0);
goto fetch_from_array;
}
if (dim == NULL) {
zend_throw_error(NULL, "[] operator not supported for strings");
} else {
zend_check_string_offset(dim, type);
zend_wrong_string_offset();
}
ZVAL_ERROR(result);
} else if (EXPECTED(Z_TYPE_P(container) == IS_OBJECT)) {
if (/*dim_type == IS_CV &&*/ dim && UNEXPECTED(Z_TYPE_P(dim) == IS_UNDEF)) {
zval_undefined_cv(EG(current_execute_data)->opline->op2.var, EG(current_execute_data));
dim = &EG(uninitialized_zval);
}
if (!Z_OBJ_HT_P(container)->read_dimension) {
zend_throw_error(NULL, "Cannot use object as array");
ZVAL_ERROR(result);
} else {
retval = Z_OBJ_HT_P(container)->read_dimension(container, dim, type, result);
if (UNEXPECTED(retval == &EG(uninitialized_zval))) {
zend_class_entry *ce = Z_OBJCE_P(container);
ZVAL_NULL(result);
zend_error(E_NOTICE, "Indirect modification of overloaded element of %s has no effect", ZSTR_VAL(ce->name));
} else if (EXPECTED(retval && Z_TYPE_P(retval) != IS_UNDEF)) {
if (!Z_ISREF_P(retval)) {
if (Z_REFCOUNTED_P(retval) &&
Z_REFCOUNT_P(retval) > 1) {
if (Z_TYPE_P(retval) != IS_OBJECT) {
Z_DELREF_P(retval);
ZVAL_DUP(result, retval);
retval = result;
} else {
ZVAL_COPY_VALUE(result, retval);
retval = result;
}
}
if (Z_TYPE_P(retval) != IS_OBJECT) {
zend_class_entry *ce = Z_OBJCE_P(container);
zend_error(E_NOTICE, "Indirect modification of overloaded element of %s has no effect", ZSTR_VAL(ce->name));
}
} else if (UNEXPECTED(Z_REFCOUNT_P(retval) == 1)) {
ZVAL_UNREF(retval);
}
if (result != retval) {
ZVAL_INDIRECT(result, retval);
}
} else {
ZVAL_ERROR(result);
}
}
} else {
if (type != BP_VAR_W && UNEXPECTED(Z_TYPE_P(container) == IS_UNDEF)) {
zval_undefined_cv(EG(current_execute_data)->opline->op1.var, EG(current_execute_data));
}
if (/*dim_type == IS_CV &&*/ dim && UNEXPECTED(Z_TYPE_P(dim) == IS_UNDEF)) {
zval_undefined_cv(EG(current_execute_data)->opline->op2.var, EG(current_execute_data));
}
if (EXPECTED(Z_TYPE_P(container) <= IS_FALSE)) {
if (type != BP_VAR_UNSET) {
goto convert_to_array;
} else {
/* for read-mode only */
ZVAL_NULL(result);
}
} else if (EXPECTED(Z_ISERROR_P(container))) {
ZVAL_ERROR(result);
} else {
if (type == BP_VAR_UNSET) {
zend_error(E_WARNING, "Cannot unset offset in a non-array variable");
ZVAL_NULL(result);
} else {
zend_error(E_WARNING, "Cannot use a scalar value as an array");
ZVAL_ERROR(result);
}
}
}
}
static zend_never_inline void zend_fetch_dimension_address_W(zval *result, zval *container_ptr, zval *dim, int dim_type)
{
zend_fetch_dimension_address(result, container_ptr, dim, dim_type, BP_VAR_W);
}
static zend_never_inline void zend_fetch_dimension_address_RW(zval *result, zval *container_ptr, zval *dim, int dim_type)
{
zend_fetch_dimension_address(result, container_ptr, dim, dim_type, BP_VAR_RW);
}
static zend_never_inline void zend_fetch_dimension_address_UNSET(zval *result, zval *container_ptr, zval *dim, int dim_type)
{
zend_fetch_dimension_address(result, container_ptr, dim, dim_type, BP_VAR_UNSET);
}
static zend_always_inline void zend_fetch_dimension_address_read(zval *result, zval *container, zval *dim, int dim_type, int type, int support_strings)
{
zval *retval;
if (EXPECTED(Z_TYPE_P(container) == IS_ARRAY)) {
try_array:
retval = zend_fetch_dimension_address_inner(Z_ARRVAL_P(container), dim, dim_type, type);
ZVAL_COPY(result, retval);
return;
} else if (EXPECTED(Z_TYPE_P(container) == IS_REFERENCE)) {
container = Z_REFVAL_P(container);
if (EXPECTED(Z_TYPE_P(container) == IS_ARRAY)) {
goto try_array;
}
}
if (support_strings && EXPECTED(Z_TYPE_P(container) == IS_STRING)) {
zend_long offset;
try_string_offset:
if (UNEXPECTED(Z_TYPE_P(dim) != IS_LONG)) {
switch (Z_TYPE_P(dim)) {
/* case IS_LONG: */
case IS_STRING:
if (IS_LONG == is_numeric_string(Z_STRVAL_P(dim), Z_STRLEN_P(dim), NULL, NULL, -1)) {
break;
}
if (type == BP_VAR_IS) {
ZVAL_NULL(result);
return;
}
zend_error(E_WARNING, "Illegal string offset '%s'", Z_STRVAL_P(dim));
break;
case IS_UNDEF:
zval_undefined_cv(EG(current_execute_data)->opline->op2.var, EG(current_execute_data));
case IS_DOUBLE:
case IS_NULL:
case IS_FALSE:
case IS_TRUE:
if (type != BP_VAR_IS) {
zend_error(E_NOTICE, "String offset cast occurred");
}
break;
case IS_REFERENCE:
dim = Z_REFVAL_P(dim);
goto try_string_offset;
default:
zend_error(E_WARNING, "Illegal offset type");
break;
}
offset = _zval_get_long_func(dim);
} else {
offset = Z_LVAL_P(dim);
}
if (UNEXPECTED(Z_STRLEN_P(container) < (size_t)((offset < 0) ? -offset : (offset + 1)))) {
if (type != BP_VAR_IS) {
zend_error(E_NOTICE, "Uninitialized string offset: %pd", offset);
ZVAL_EMPTY_STRING(result);
} else {
ZVAL_NULL(result);
}
} else {
zend_uchar c;
zend_long real_offset;
real_offset = (UNEXPECTED(offset < 0)) /* Handle negative offset */
? (zend_long)Z_STRLEN_P(container) + offset : offset;
c = (zend_uchar)Z_STRVAL_P(container)[real_offset];
if (CG(one_char_string)[c]) {
ZVAL_INTERNED_STR(result, CG(one_char_string)[c]);
} else {
ZVAL_NEW_STR(result, zend_string_init(Z_STRVAL_P(container) + real_offset, 1, 0));
}
}
} else if (EXPECTED(Z_TYPE_P(container) == IS_OBJECT)) {
if (/*dim_type == IS_CV &&*/ UNEXPECTED(Z_TYPE_P(dim) == IS_UNDEF)) {
zval_undefined_cv(EG(current_execute_data)->opline->op2.var, EG(current_execute_data));
dim = &EG(uninitialized_zval);
}
if (!Z_OBJ_HT_P(container)->read_dimension) {
zend_throw_error(NULL, "Cannot use object as array");
ZVAL_NULL(result);
} else {
retval = Z_OBJ_HT_P(container)->read_dimension(container, dim, type, result);
ZEND_ASSERT(result != NULL);
if (retval) {
if (result != retval) {
ZVAL_COPY(result, retval);
}
} else {
ZVAL_NULL(result);
}
}
} else {
if (type != BP_VAR_IS && UNEXPECTED(Z_TYPE_P(container) == IS_UNDEF)) {
zval_undefined_cv(EG(current_execute_data)->opline->op1.var, EG(current_execute_data));
}
if (/*dim_type == IS_CV &&*/ UNEXPECTED(Z_TYPE_P(dim) == IS_UNDEF)) {
zval_undefined_cv(EG(current_execute_data)->opline->op2.var, EG(current_execute_data));
}
ZVAL_NULL(result);
}
}
static zend_never_inline void zend_fetch_dimension_address_read_R(zval *result, zval *container, zval *dim, int dim_type)
{
zend_fetch_dimension_address_read(result, container, dim, dim_type, BP_VAR_R, 1);
}
static zend_never_inline void zend_fetch_dimension_address_read_IS(zval *result, zval *container, zval *dim, int dim_type)
{
zend_fetch_dimension_address_read(result, container, dim, dim_type, BP_VAR_IS, 1);
}
static zend_never_inline void zend_fetch_dimension_address_read_LIST(zval *result, zval *container, zval *dim)
{
zend_fetch_dimension_address_read(result, container, dim, IS_TMP_VAR, BP_VAR_R, 0);
}
ZEND_API void zend_fetch_dimension_by_zval(zval *result, zval *container, zval *dim)
{
zend_fetch_dimension_address_read_R(result, container, dim, IS_TMP_VAR);
}
static zend_always_inline void zend_fetch_property_address(zval *result, zval *container, uint32_t container_op_type, zval *prop_ptr, uint32_t prop_op_type, void **cache_slot, int type)
{
if (container_op_type != IS_UNUSED && UNEXPECTED(Z_TYPE_P(container) != IS_OBJECT)) {
do {
if (container_op_type == IS_VAR && UNEXPECTED(Z_ISERROR_P(container))) {
ZVAL_ERROR(result);
return;
}
if (Z_ISREF_P(container)) {
container = Z_REFVAL_P(container);
if (EXPECTED(Z_TYPE_P(container) == IS_OBJECT)) {
break;
}
}
/* this should modify object only if it's empty */
if (type != BP_VAR_UNSET &&
EXPECTED(Z_TYPE_P(container) <= IS_FALSE ||
(Z_TYPE_P(container) == IS_STRING && Z_STRLEN_P(container)==0))) {
zval_ptr_dtor_nogc(container);
object_init(container);
} else {
zend_error(E_WARNING, "Attempt to modify property of non-object");
ZVAL_ERROR(result);
return;
}
} while (0);
}
if (prop_op_type == IS_CONST &&
EXPECTED(Z_OBJCE_P(container) == CACHED_PTR_EX(cache_slot))) {
uint32_t prop_offset = (uint32_t)(intptr_t)CACHED_PTR_EX(cache_slot + 1);
zend_object *zobj = Z_OBJ_P(container);
zval *retval;
if (EXPECTED(prop_offset != (uint32_t)ZEND_DYNAMIC_PROPERTY_OFFSET)) {
retval = OBJ_PROP(zobj, prop_offset);
if (EXPECTED(Z_TYPE_P(retval) != IS_UNDEF)) {
ZVAL_INDIRECT(result, retval);
return;
}
} else if (EXPECTED(zobj->properties != NULL)) {
if (UNEXPECTED(GC_REFCOUNT(zobj->properties) > 1)) {
if (EXPECTED(!(GC_FLAGS(zobj->properties) & IS_ARRAY_IMMUTABLE))) {
GC_REFCOUNT(zobj->properties)--;
}
zobj->properties = zend_array_dup(zobj->properties);
}
retval = zend_hash_find(zobj->properties, Z_STR_P(prop_ptr));
if (EXPECTED(retval)) {
ZVAL_INDIRECT(result, retval);
return;
}
}
}
if (EXPECTED(Z_OBJ_HT_P(container)->get_property_ptr_ptr)) {
zval *ptr = Z_OBJ_HT_P(container)->get_property_ptr_ptr(container, prop_ptr, type, cache_slot);
if (NULL == ptr) {
if (EXPECTED(Z_OBJ_HT_P(container)->read_property)) {
ptr = Z_OBJ_HT_P(container)->read_property(container, prop_ptr, type, cache_slot, result);
if (ptr != result) {
ZVAL_INDIRECT(result, ptr);
} else if (UNEXPECTED(Z_ISREF_P(ptr) && Z_REFCOUNT_P(ptr) == 1)) {
ZVAL_UNREF(ptr);
}
} else {
zend_throw_error(NULL, "Cannot access undefined property for object with overloaded property access");
ZVAL_ERROR(result);
}
} else {
ZVAL_INDIRECT(result, ptr);
}
} else if (EXPECTED(Z_OBJ_HT_P(container)->read_property)) {
zval *ptr = Z_OBJ_HT_P(container)->read_property(container, prop_ptr, type, cache_slot, result);
if (ptr != result) {
ZVAL_INDIRECT(result, ptr);
} else if (UNEXPECTED(Z_ISREF_P(ptr) && Z_REFCOUNT_P(ptr) == 1)) {
ZVAL_UNREF(ptr);
}
} else {
zend_error(E_WARNING, "This object doesn't support property references");
ZVAL_ERROR(result);
}
}
#if ZEND_INTENSIVE_DEBUGGING
#define CHECK_SYMBOL_TABLES() \
zend_hash_apply(&EG(symbol_table), zend_check_symbol); \
if (&EG(symbol_table)!=EX(symbol_table)) { \
zend_hash_apply(EX(symbol_table), zend_check_symbol); \
}
static int zend_check_symbol(zval *pz)
{
if (Z_TYPE_P(pz) == IS_INDIRECT) {
pz = Z_INDIRECT_P(pz);
}
if (Z_TYPE_P(pz) > 10) {
fprintf(stderr, "Warning! %x has invalid type!\n", *pz);
/* See http://support.microsoft.com/kb/190351 */
#ifdef ZEND_WIN32
fflush(stderr);
#endif
} else if (Z_TYPE_P(pz) == IS_ARRAY) {
zend_hash_apply(Z_ARRVAL_P(pz), zend_check_symbol);
} else if (Z_TYPE_P(pz) == IS_OBJECT) {
/* OBJ-TBI - doesn't support new object model! */
zend_hash_apply(Z_OBJPROP_P(pz), zend_check_symbol);
}
return 0;
}
#else
#define CHECK_SYMBOL_TABLES()
#endif
ZEND_API void execute_internal(zend_execute_data *execute_data, zval *return_value)
{
execute_data->func->internal_function.handler(execute_data, return_value);
}
ZEND_API void zend_clean_and_cache_symbol_table(zend_array *symbol_table) /* {{{ */
{
if (EG(symtable_cache_ptr) >= EG(symtable_cache_limit)) {
zend_array_destroy(symbol_table);
} else {
/* clean before putting into the cache, since clean
could call dtors, which could use cached hash */
zend_symtable_clean(symbol_table);
*(++EG(symtable_cache_ptr)) = symbol_table;
}
}
/* }}} */
static zend_always_inline void i_free_compiled_variables(zend_execute_data *execute_data) /* {{{ */
{
zval *cv = EX_VAR_NUM(0);
zval *end = cv + EX(func)->op_array.last_var;
while (EXPECTED(cv != end)) {
if (Z_REFCOUNTED_P(cv)) {
if (!Z_DELREF_P(cv)) {
zend_refcounted *r = Z_COUNTED_P(cv);
ZVAL_NULL(cv);
zval_dtor_func_for_ptr(r);
} else {
GC_ZVAL_CHECK_POSSIBLE_ROOT(cv);
}
}
cv++;
}
}
/* }}} */
void zend_free_compiled_variables(zend_execute_data *execute_data) /* {{{ */
{
i_free_compiled_variables(execute_data);
}
/* }}} */
#ifdef ZEND_WIN32
static zend_never_inline ZEND_COLD ZEND_NORETURN void ZEND_FASTCALL zend_interrupt(void) /* {{{ */
{
zend_timeout(0);
}
/* }}} */
# define ZEND_VM_INTERRUPT_CHECK() do { \
if (UNEXPECTED(EG(timed_out))) { \
zend_interrupt(); \
} \
} while (0)
#else
# define ZEND_VM_INTERRUPT_CHECK() do { \
} while (0)
#endif
/*
* Stack Frame Layout (the whole stack frame is allocated at once)
* ==================
*
* +========================================+
* EG(current_execute_data) -> | zend_execute_data |
* +----------------------------------------+
* EX_CV_NUM(0) ---------> | VAR[0] = ARG[1] |
* | ... |
* | VAR[op_array->num_args-1] = ARG[N] |
* | ... |
* | VAR[op_array->last_var-1] |
* | VAR[op_array->last_var] = TMP[0] |
* | ... |
* | VAR[op_array->last_var+op_array->T-1] |
* | ARG[N+1] (extra_args) |
* | ... |
* +----------------------------------------+
*/
static zend_always_inline void i_init_func_execute_data(zend_execute_data *execute_data, zend_op_array *op_array, zval *return_value, int check_this) /* {{{ */
{
uint32_t first_extra_arg, num_args;
ZEND_ASSERT(EX(func) == (zend_function*)op_array);
EX(opline) = op_array->opcodes;
EX(call) = NULL;
EX(return_value) = return_value;
/* Handle arguments */
first_extra_arg = op_array->num_args;
num_args = EX_NUM_ARGS();
if (UNEXPECTED(num_args > first_extra_arg)) {
if (EXPECTED(!(op_array->fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE))) {
zval *end, *src, *dst;
uint32_t type_flags = 0;
if (EXPECTED((op_array->fn_flags & ZEND_ACC_HAS_TYPE_HINTS) == 0)) {
/* Skip useless ZEND_RECV and ZEND_RECV_INIT opcodes */
EX(opline) += first_extra_arg;
}
/* move extra args into separate array after all CV and TMP vars */
end = EX_VAR_NUM(first_extra_arg - 1);
src = end + (num_args - first_extra_arg);
dst = src + (op_array->last_var + op_array->T - first_extra_arg);
if (EXPECTED(src != dst)) {
do {
type_flags |= Z_TYPE_INFO_P(src);
ZVAL_COPY_VALUE(dst, src);
ZVAL_UNDEF(src);
src--;
dst--;
} while (src != end);
} else {
do {
type_flags |= Z_TYPE_INFO_P(src);
src--;
} while (src != end);
}
ZEND_ADD_CALL_FLAG(execute_data, ((type_flags >> Z_TYPE_FLAGS_SHIFT) & IS_TYPE_REFCOUNTED));
}
} else if (EXPECTED((op_array->fn_flags & ZEND_ACC_HAS_TYPE_HINTS) == 0)) {
/* Skip useless ZEND_RECV and ZEND_RECV_INIT opcodes */
EX(opline) += num_args;
}
/* Initialize CV variables (skip arguments) */
if (EXPECTED((int)num_args < op_array->last_var)) {
zval *var = EX_VAR_NUM(num_args);
zval *end = EX_VAR_NUM(op_array->last_var);
do {
ZVAL_UNDEF(var);
var++;
} while (var != end);
}
if (check_this && op_array->this_var != (uint32_t)-1 && EXPECTED(Z_TYPE(EX(This)) == IS_OBJECT)) {
ZVAL_OBJ(EX_VAR(op_array->this_var), Z_OBJ(EX(This)));
GC_REFCOUNT(Z_OBJ(EX(This)))++;
}
EX_LOAD_RUN_TIME_CACHE(op_array);
EX_LOAD_LITERALS(op_array);
EG(current_execute_data) = execute_data;
}
/* }}} */
static zend_never_inline void ZEND_FASTCALL init_func_run_time_cache(zend_op_array *op_array) /* {{{ */
{
ZEND_ASSERT(op_array->run_time_cache == NULL);
op_array->run_time_cache = zend_arena_alloc(&CG(arena), op_array->cache_size);
memset(op_array->run_time_cache, 0, op_array->cache_size);
}
/* }}} */
static zend_always_inline void i_init_code_execute_data(zend_execute_data *execute_data, zend_op_array *op_array, zval *return_value) /* {{{ */
{
ZEND_ASSERT(EX(func) == (zend_function*)op_array);
EX(opline) = op_array->opcodes;
EX(call) = NULL;
EX(return_value) = return_value;
if (UNEXPECTED(op_array->this_var != (uint32_t)-1) && EXPECTED(Z_TYPE(EX(This)) == IS_OBJECT)) {
GC_REFCOUNT(Z_OBJ(EX(This)))++;
if (!zend_hash_str_add(EX(symbol_table), "this", sizeof("this")-1, &EX(This))) {
GC_REFCOUNT(Z_OBJ(EX(This)))--;
}
}
zend_attach_symbol_table(execute_data);
if (!op_array->run_time_cache) {
op_array->run_time_cache = emalloc(op_array->cache_size);
memset(op_array->run_time_cache, 0, op_array->cache_size);
}
EX_LOAD_RUN_TIME_CACHE(op_array);
EX_LOAD_LITERALS(op_array);
EG(current_execute_data) = execute_data;
}
/* }}} */
static zend_always_inline void i_init_execute_data(zend_execute_data *execute_data, zend_op_array *op_array, zval *return_value) /* {{{ */
{
ZEND_ASSERT(EX(func) == (zend_function*)op_array);
EX(opline) = op_array->opcodes;
EX(call) = NULL;
EX(return_value) = return_value;
if (UNEXPECTED(EX(symbol_table) != NULL)) {
if (UNEXPECTED(op_array->this_var != (uint32_t)-1) && EXPECTED(Z_TYPE(EX(This)) == IS_OBJECT)) {
GC_REFCOUNT(Z_OBJ(EX(This)))++;
if (!zend_hash_str_add(EX(symbol_table), "this", sizeof("this")-1, &EX(This))) {
GC_REFCOUNT(Z_OBJ(EX(This)))--;
}
}
zend_attach_symbol_table(execute_data);
} else {
uint32_t first_extra_arg, num_args;
/* Handle arguments */
first_extra_arg = op_array->num_args;
num_args = EX_NUM_ARGS();
if (UNEXPECTED(num_args > first_extra_arg)) {
if (EXPECTED(!(op_array->fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE))) {
zval *end, *src, *dst;
uint32_t type_flags = 0;
if (EXPECTED((op_array->fn_flags & ZEND_ACC_HAS_TYPE_HINTS) == 0)) {
/* Skip useless ZEND_RECV and ZEND_RECV_INIT opcodes */
EX(opline) += first_extra_arg;
}
/* move extra args into separate array after all CV and TMP vars */
end = EX_VAR_NUM(first_extra_arg - 1);
src = end + (num_args - first_extra_arg);
dst = src + (op_array->last_var + op_array->T - first_extra_arg);
if (EXPECTED(src != dst)) {
do {
type_flags |= Z_TYPE_INFO_P(src);
ZVAL_COPY_VALUE(dst, src);
ZVAL_UNDEF(src);
src--;
dst--;
} while (src != end);
} else {
do {
type_flags |= Z_TYPE_INFO_P(src);
src--;
} while (src != end);
}
ZEND_ADD_CALL_FLAG(execute_data, ((type_flags >> Z_TYPE_FLAGS_SHIFT) & IS_TYPE_REFCOUNTED));
}
} else if (EXPECTED((op_array->fn_flags & ZEND_ACC_HAS_TYPE_HINTS) == 0)) {
/* Skip useless ZEND_RECV and ZEND_RECV_INIT opcodes */
EX(opline) += num_args;
}
/* Initialize CV variables (skip arguments) */
if (EXPECTED((int)num_args < op_array->last_var)) {
zval *var = EX_VAR_NUM(num_args);
zval *end = EX_VAR_NUM(op_array->last_var);
do {
ZVAL_UNDEF(var);
var++;
} while (var != end);
}
if (op_array->this_var != (uint32_t)-1 && EXPECTED(Z_TYPE(EX(This)) == IS_OBJECT)) {
ZVAL_OBJ(EX_VAR(op_array->this_var), Z_OBJ(EX(This)));
GC_REFCOUNT(Z_OBJ(EX(This)))++;
}
}
if (!op_array->run_time_cache) {
if (op_array->function_name) {
op_array->run_time_cache = zend_arena_alloc(&CG(arena), op_array->cache_size);
} else {
op_array->run_time_cache = emalloc(op_array->cache_size);
}
memset(op_array->run_time_cache, 0, op_array->cache_size);
}
EX_LOAD_RUN_TIME_CACHE(op_array);
EX_LOAD_LITERALS(op_array);
EG(current_execute_data) = execute_data;
}
/* }}} */
ZEND_API zend_execute_data *zend_create_generator_execute_data(zend_execute_data *call, zend_op_array *op_array, zval *return_value) /* {{{ */
{
/*
* Normally the execute_data is allocated on the VM stack (because it does
* not actually do any allocation and thus is faster). For generators
* though this behavior would be suboptimal, because the (rather large)
* structure would have to be copied back and forth every time execution is
* suspended or resumed. That's why for generators the execution context
* is allocated using a separate VM stack, thus allowing to save and
* restore it simply by replacing a pointer.
*/
zend_execute_data *execute_data;
uint32_t num_args = ZEND_CALL_NUM_ARGS(call);
size_t stack_size = (ZEND_CALL_FRAME_SLOT + MAX(op_array->last_var + op_array->T, num_args)) * sizeof(zval);
uint32_t call_info;
EG(vm_stack) = zend_vm_stack_new_page(
EXPECTED(stack_size < ZEND_VM_STACK_FREE_PAGE_SIZE(1)) ?
ZEND_VM_STACK_PAGE_SIZE(1) :
ZEND_VM_STACK_PAGE_ALIGNED_SIZE(1, stack_size),
NULL);
EG(vm_stack_top) = EG(vm_stack)->top;
EG(vm_stack_end) = EG(vm_stack)->end;
call_info = ZEND_CALL_TOP_FUNCTION | ZEND_CALL_ALLOCATED | (ZEND_CALL_INFO(call) & (ZEND_CALL_CLOSURE|ZEND_CALL_RELEASE_THIS));
execute_data = zend_vm_stack_push_call_frame(
call_info,
(zend_function*)op_array,
num_args,
Z_TYPE(call->This) != IS_OBJECT ? Z_CE(call->This) : NULL,
Z_TYPE(call->This) == IS_OBJECT ? Z_OBJ(call->This) : NULL);
EX(prev_execute_data) = NULL;
EX_NUM_ARGS() = num_args;
/* copy arguments */
if (num_args > 0) {
zval *arg_src = ZEND_CALL_ARG(call, 1);
zval *arg_dst = ZEND_CALL_ARG(execute_data, 1);
zval *end = arg_src + num_args;
do {
ZVAL_COPY_VALUE(arg_dst, arg_src);
arg_src++;
arg_dst++;
} while (arg_src != end);
}
EX(symbol_table) = NULL;
if (UNEXPECTED(!op_array->run_time_cache)) {
init_func_run_time_cache(op_array);
}
i_init_func_execute_data(execute_data, op_array, return_value, 1);
return execute_data;
}
/* }}} */
ZEND_API void zend_init_execute_data(zend_execute_data *execute_data, zend_op_array *op_array, zval *return_value) /* {{{ */
{
EX(prev_execute_data) = EG(current_execute_data);
i_init_execute_data(execute_data, op_array, return_value);
}
/* }}} */
static zend_always_inline zend_bool zend_is_by_ref_func_arg_fetch(const zend_op *opline, zend_execute_data *call) /* {{{ */
{
uint32_t arg_num = opline->extended_value & ZEND_FETCH_ARG_MASK;
if (EXPECTED(arg_num <= MAX_ARG_FLAG_NUM)) {
return QUICK_ARG_SHOULD_BE_SENT_BY_REF(call->func, arg_num);
}
return ARG_SHOULD_BE_SENT_BY_REF(call->func, arg_num);
}
/* }}} */
static zend_execute_data *zend_vm_stack_copy_call_frame(zend_execute_data *call, uint32_t passed_args, uint32_t additional_args) /* {{{ */
{
zend_execute_data *new_call;
int used_stack = (EG(vm_stack_top) - (zval*)call) + additional_args;
/* copy call frame into new stack segment */
new_call = zend_vm_stack_extend(used_stack * sizeof(zval));
*new_call = *call;
ZEND_ADD_CALL_FLAG(new_call, ZEND_CALL_ALLOCATED);
if (passed_args) {
zval *src = ZEND_CALL_ARG(call, 1);
zval *dst = ZEND_CALL_ARG(new_call, 1);
do {
ZVAL_COPY_VALUE(dst, src);
passed_args--;
src++;
dst++;
} while (passed_args);
}
/* delete old call_frame from previous stack segment */
EG(vm_stack)->prev->top = (zval*)call;
/* delete previous stack segment if it becames empty */
if (UNEXPECTED(EG(vm_stack)->prev->top == ZEND_VM_STACK_ELEMENTS(EG(vm_stack)->prev))) {
zend_vm_stack r = EG(vm_stack)->prev;
EG(vm_stack)->prev = r->prev;
efree(r);
}
return new_call;
}
/* }}} */
static zend_always_inline void zend_vm_stack_extend_call_frame(zend_execute_data **call, uint32_t passed_args, uint32_t additional_args) /* {{{ */
{
if (EXPECTED((uint32_t)(EG(vm_stack_end) - EG(vm_stack_top)) > additional_args)) {
EG(vm_stack_top) += additional_args;
} else {
*call = zend_vm_stack_copy_call_frame(*call, passed_args, additional_args);
}
}
/* }}} */
static zend_always_inline zend_generator *zend_get_running_generator(zend_execute_data *execute_data) /* {{{ */
{
/* The generator object is stored in EX(return_value) */
zend_generator *generator = (zend_generator *) EX(return_value);
/* However control may currently be delegated to another generator.
* That's the one we're interested in. */
return generator;
}
/* }}} */
static void cleanup_unfinished_calls(zend_execute_data *execute_data, uint32_t op_num) /* {{{ */
{
if (UNEXPECTED(EX(call))) {
zend_execute_data *call = EX(call);
zend_op *opline = EX(func)->op_array.opcodes + op_num;
int level;
int do_exit;
if (UNEXPECTED(opline->opcode == ZEND_INIT_FCALL ||
opline->opcode == ZEND_INIT_FCALL_BY_NAME ||
opline->opcode == ZEND_INIT_DYNAMIC_CALL ||
opline->opcode == ZEND_INIT_METHOD_CALL ||
opline->opcode == ZEND_INIT_STATIC_METHOD_CALL)) {
ZEND_ASSERT(op_num);
opline--;
}
do {
/* If the exception was thrown during a function call there might be
* arguments pushed to the stack that have to be dtor'ed. */
/* find the number of actually passed arguments */
level = 0;
do_exit = 0;
do {
switch (opline->opcode) {
case ZEND_DO_FCALL:
case ZEND_DO_ICALL:
case ZEND_DO_UCALL:
case ZEND_DO_FCALL_BY_NAME:
level++;
break;
case ZEND_INIT_FCALL:
case ZEND_INIT_FCALL_BY_NAME:
case ZEND_INIT_NS_FCALL_BY_NAME:
case ZEND_INIT_DYNAMIC_CALL:
case ZEND_INIT_USER_CALL:
case ZEND_INIT_METHOD_CALL:
case ZEND_INIT_STATIC_METHOD_CALL:
case ZEND_NEW:
if (level == 0) {
ZEND_CALL_NUM_ARGS(call) = 0;
do_exit = 1;
}
level--;
break;
case ZEND_SEND_VAL:
case ZEND_SEND_VAL_EX:
case ZEND_SEND_VAR:
case ZEND_SEND_VAR_EX:
case ZEND_SEND_REF:
case ZEND_SEND_VAR_NO_REF:
case ZEND_SEND_USER:
if (level == 0) {
ZEND_CALL_NUM_ARGS(call) = opline->op2.num;
do_exit = 1;
}
break;
case ZEND_SEND_ARRAY:
case ZEND_SEND_UNPACK:
if (level == 0) {
do_exit = 1;
}
break;
}
if (!do_exit) {
opline--;
}
} while (!do_exit);
if (call->prev_execute_data) {
/* skip current call region */
level = 0;
do_exit = 0;
do {
switch (opline->opcode) {
case ZEND_DO_FCALL:
case ZEND_DO_ICALL:
case ZEND_DO_UCALL:
case ZEND_DO_FCALL_BY_NAME:
level++;
break;
case ZEND_INIT_FCALL:
case ZEND_INIT_FCALL_BY_NAME:
case ZEND_INIT_NS_FCALL_BY_NAME:
case ZEND_INIT_DYNAMIC_CALL:
case ZEND_INIT_USER_CALL:
case ZEND_INIT_METHOD_CALL:
case ZEND_INIT_STATIC_METHOD_CALL:
case ZEND_NEW:
if (level == 0) {
do_exit = 1;
}
level--;
break;
}
opline--;
} while (!do_exit);
}
zend_vm_stack_free_args(EX(call));
if (ZEND_CALL_INFO(call) & ZEND_CALL_RELEASE_THIS) {
if (ZEND_CALL_INFO(call) & ZEND_CALL_CTOR) {
GC_REFCOUNT(Z_OBJ(call->This))--;
if (GC_REFCOUNT(Z_OBJ(call->This)) == 1) {
zend_object_store_ctor_failed(Z_OBJ(call->This));
}
}
OBJ_RELEASE(Z_OBJ(call->This));
}
if (call->func->common.fn_flags & ZEND_ACC_CLOSURE) {
zend_object_release((zend_object *) call->func->common.prototype);
} else if (call->func->common.fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE) {
zend_string_release(call->func->common.function_name);
zend_free_trampoline(call->func);
}
EX(call) = call->prev_execute_data;
zend_vm_stack_free_call_frame(call);
call = EX(call);
} while (call);
}
}
/* }}} */
static void cleanup_live_vars(zend_execute_data *execute_data, uint32_t op_num, uint32_t catch_op_num) /* {{{ */
{
int i;
for (i = 0; i < EX(func)->op_array.last_live_range; i++) {
const zend_live_range *range = &EX(func)->op_array.live_range[i];
if (range->start > op_num) {
/* further blocks will not be relevant... */
break;
} else if (op_num < range->end) {
if (!catch_op_num || catch_op_num >= range->end) {
uint32_t kind = range->var & ZEND_LIVE_MASK;
uint32_t var_num = range->var & ~ZEND_LIVE_MASK;
zval *var = EX_VAR(var_num);
if (kind == ZEND_LIVE_TMPVAR) {
zval_ptr_dtor_nogc(var);
} else if (kind == ZEND_LIVE_LOOP) {
if (Z_TYPE_P(var) != IS_ARRAY && Z_FE_ITER_P(var) != (uint32_t)-1) {
zend_hash_iterator_del(Z_FE_ITER_P(var));
}
zval_ptr_dtor_nogc(var);
} else if (kind == ZEND_LIVE_ROPE) {
zend_string **rope = (zend_string **)var;
zend_op *last = EX(func)->op_array.opcodes + op_num;
while ((last->opcode != ZEND_ROPE_ADD && last->opcode != ZEND_ROPE_INIT)
|| last->result.var != var_num) {
ZEND_ASSERT(last >= EX(func)->op_array.opcodes);
last--;
}
if (last->opcode == ZEND_ROPE_INIT) {
zend_string_release(*rope);
} else {
int j = last->extended_value;
do {
zend_string_release(rope[j]);
} while (j--);
}
} else if (kind == ZEND_LIVE_SILENCE) {
/* restore previous error_reporting value */
if (!EG(error_reporting) && Z_LVAL_P(var) != 0) {
EG(error_reporting) = Z_LVAL_P(var);
}
}
}
}
}
}
/* }}} */
void zend_cleanup_unfinished_execution(zend_execute_data *execute_data, uint32_t op_num, uint32_t catch_op_num) {
cleanup_unfinished_calls(execute_data, op_num);
cleanup_live_vars(execute_data, op_num, catch_op_num);
}
static void zend_swap_operands(zend_op *op) /* {{{ */
{
znode_op tmp;
zend_uchar tmp_type;
tmp = op->op1;
tmp_type = op->op1_type;
op->op1 = op->op2;
op->op1_type = op->op2_type;
op->op2 = tmp;
op->op2_type = tmp_type;
}
/* }}} */
static zend_never_inline zend_execute_data *zend_init_dynamic_call_string(zend_string *function, uint32_t num_args) /* {{{ */
{
zend_function *fbc;
zval *func;
zend_class_entry *called_scope;
zend_string *lcname;
const char *colon;
if ((colon = zend_memrchr(ZSTR_VAL(function), ':', ZSTR_LEN(function))) != NULL &&
colon > ZSTR_VAL(function) &&
*(colon-1) == ':'
) {
zend_string *mname;
size_t cname_length = colon - ZSTR_VAL(function) - 1;
size_t mname_length = ZSTR_LEN(function) - cname_length - (sizeof("::") - 1);
lcname = zend_string_init(ZSTR_VAL(function), cname_length, 0);
called_scope = zend_fetch_class_by_name(lcname, NULL, ZEND_FETCH_CLASS_DEFAULT | ZEND_FETCH_CLASS_EXCEPTION);
if (UNEXPECTED(called_scope == NULL)) {
zend_string_release(lcname);
return NULL;
}
mname = zend_string_init(ZSTR_VAL(function) + (cname_length + sizeof("::") - 1), mname_length, 0);
if (called_scope->get_static_method) {
fbc = called_scope->get_static_method(called_scope, mname);
} else {
fbc = zend_std_get_static_method(called_scope, mname, NULL);
}
if (UNEXPECTED(fbc == NULL)) {
if (EXPECTED(!EG(exception))) {
zend_throw_error(NULL, "Call to undefined method %s::%s()", ZSTR_VAL(called_scope->name), ZSTR_VAL(mname));
}
zend_string_release(lcname);
zend_string_release(mname);
return NULL;
}
zend_string_release(lcname);
zend_string_release(mname);
if (UNEXPECTED(!(fbc->common.fn_flags & ZEND_ACC_STATIC))) {
if (fbc->common.fn_flags & ZEND_ACC_ALLOW_STATIC) {
zend_error(E_DEPRECATED,
"Non-static method %s::%s() should not be called statically",
ZSTR_VAL(fbc->common.scope->name), ZSTR_VAL(fbc->common.function_name));
if (UNEXPECTED(EG(exception) != NULL)) {
return NULL;
}
} else {
zend_throw_error(
zend_ce_error,
"Non-static method %s::%s() cannot be called statically",
ZSTR_VAL(fbc->common.scope->name), ZSTR_VAL(fbc->common.function_name));
return NULL;
}
}
} else {
if (ZSTR_VAL(function)[0] == '\\') {
lcname = zend_string_alloc(ZSTR_LEN(function) - 1, 0);
zend_str_tolower_copy(ZSTR_VAL(lcname), ZSTR_VAL(function) + 1, ZSTR_LEN(function) - 1);
} else {
lcname = zend_string_tolower(function);
}
if (UNEXPECTED((func = zend_hash_find(EG(function_table), lcname)) == NULL)) {
zend_throw_error(NULL, "Call to undefined function %s()", ZSTR_VAL(function));
zend_string_release(lcname);
return NULL;
}
zend_string_release(lcname);
fbc = Z_FUNC_P(func);
called_scope = NULL;
}
if (EXPECTED(fbc->type == ZEND_USER_FUNCTION) && UNEXPECTED(!fbc->op_array.run_time_cache)) {
init_func_run_time_cache(&fbc->op_array);
}
return zend_vm_stack_push_call_frame(ZEND_CALL_NESTED_FUNCTION,
fbc, num_args, called_scope, NULL);
}
/* }}} */
static zend_never_inline zend_execute_data *zend_init_dynamic_call_object(zval *function, uint32_t num_args) /* {{{ */
{
zend_function *fbc;
zend_class_entry *called_scope;
zend_object *object;
uint32_t call_info = ZEND_CALL_NESTED_FUNCTION;
if (EXPECTED(Z_OBJ_HANDLER_P(function, get_closure)) &&
EXPECTED(Z_OBJ_HANDLER_P(function, get_closure)(function, &called_scope, &fbc, &object) == SUCCESS)) {
if (fbc->common.fn_flags & ZEND_ACC_CLOSURE) {
/* Delay closure destruction until its invocation */
ZEND_ASSERT(GC_TYPE((zend_object*)fbc->common.prototype) == IS_OBJECT);
GC_REFCOUNT((zend_object*)fbc->common.prototype)++;
call_info |= ZEND_CALL_CLOSURE;
} else if (object) {
call_info |= ZEND_CALL_RELEASE_THIS;
GC_REFCOUNT(object)++; /* For $this pointer */
}
} else {
zend_throw_error(NULL, "Function name must be a string");
return NULL;
}
if (EXPECTED(fbc->type == ZEND_USER_FUNCTION) && UNEXPECTED(!fbc->op_array.run_time_cache)) {
init_func_run_time_cache(&fbc->op_array);
}
return zend_vm_stack_push_call_frame(call_info,
fbc, num_args, called_scope, object);
}
/* }}} */
static zend_never_inline zend_execute_data *zend_init_dynamic_call_array(zend_array *function, uint32_t num_args) /* {{{ */
{
zend_function *fbc;
zend_class_entry *called_scope;
zend_object *object;
uint32_t call_info = ZEND_CALL_NESTED_FUNCTION;
if (zend_hash_num_elements(function) == 2) {
zval *obj;
zval *method;
obj = zend_hash_index_find(function, 0);
method = zend_hash_index_find(function, 1);
if (UNEXPECTED(!obj) || UNEXPECTED(!method)) {
zend_throw_error(NULL, "Array callback has to contain indices 0 and 1");
return NULL;
}
ZVAL_DEREF(obj);
if (UNEXPECTED(Z_TYPE_P(obj) != IS_STRING) && UNEXPECTED(Z_TYPE_P(obj) != IS_OBJECT)) {
zend_throw_error(NULL, "First array member is not a valid class name or object");
return NULL;
}
ZVAL_DEREF(method);
if (UNEXPECTED(Z_TYPE_P(method) != IS_STRING)) {
zend_throw_error(NULL, "Second array member is not a valid method");
return NULL;
}
if (Z_TYPE_P(obj) == IS_STRING) {
object = NULL;
called_scope = zend_fetch_class_by_name(Z_STR_P(obj), NULL, ZEND_FETCH_CLASS_DEFAULT | ZEND_FETCH_CLASS_EXCEPTION);
if (UNEXPECTED(called_scope == NULL)) {
return NULL;
}
if (called_scope->get_static_method) {
fbc = called_scope->get_static_method(called_scope, Z_STR_P(method));
} else {
fbc = zend_std_get_static_method(called_scope, Z_STR_P(method), NULL);
}
if (UNEXPECTED(fbc == NULL)) {
if (EXPECTED(!EG(exception))) {
zend_throw_error(NULL, "Call to undefined method %s::%s()", ZSTR_VAL(called_scope->name), Z_STRVAL_P(method));
}
return NULL;
}
if (!(fbc->common.fn_flags & ZEND_ACC_STATIC)) {
if (fbc->common.fn_flags & ZEND_ACC_ALLOW_STATIC) {
zend_error(E_DEPRECATED,
"Non-static method %s::%s() should not be called statically",
ZSTR_VAL(fbc->common.scope->name), ZSTR_VAL(fbc->common.function_name));
if (UNEXPECTED(EG(exception) != NULL)) {
return NULL;
}
} else {
zend_throw_error(
zend_ce_error,
"Non-static method %s::%s() cannot be called statically",
ZSTR_VAL(fbc->common.scope->name), ZSTR_VAL(fbc->common.function_name));
return NULL;
}
}
} else {
called_scope = Z_OBJCE_P(obj);
object = Z_OBJ_P(obj);
fbc = Z_OBJ_HT_P(obj)->get_method(&object, Z_STR_P(method), NULL);
if (UNEXPECTED(fbc == NULL)) {
if (EXPECTED(!EG(exception))) {
zend_throw_error(NULL, "Call to undefined method %s::%s()", ZSTR_VAL(object->ce->name), Z_STRVAL_P(method));
}
return NULL;
}
if ((fbc->common.fn_flags & ZEND_ACC_STATIC) != 0) {
object = NULL;
} else {
call_info |= ZEND_CALL_RELEASE_THIS;
GC_REFCOUNT(object)++; /* For $this pointer */
}
}
} else {
zend_throw_error(NULL, "Function name must be a string");
return NULL;
}
if (EXPECTED(fbc->type == ZEND_USER_FUNCTION) && UNEXPECTED(!fbc->op_array.run_time_cache)) {
init_func_run_time_cache(&fbc->op_array);
}
return zend_vm_stack_push_call_frame(call_info,
fbc, num_args, called_scope, object);
}
/* }}} */
#define ZEND_FAKE_OP_ARRAY ((zend_op_array*)(zend_intptr_t)-1)
static zend_never_inline zend_op_array* ZEND_FASTCALL zend_include_or_eval(zval *inc_filename, int type) /* {{{ */
{
zend_op_array *new_op_array = NULL;
zval tmp_inc_filename;
ZVAL_UNDEF(&tmp_inc_filename);
if (Z_TYPE_P(inc_filename) != IS_STRING) {
ZVAL_STR(&tmp_inc_filename, zval_get_string(inc_filename));
inc_filename = &tmp_inc_filename;
}
if (type != ZEND_EVAL && strlen(Z_STRVAL_P(inc_filename)) != Z_STRLEN_P(inc_filename)) {
if (type == ZEND_INCLUDE_ONCE || type == ZEND_INCLUDE) {
zend_message_dispatcher(ZMSG_FAILED_INCLUDE_FOPEN, Z_STRVAL_P(inc_filename));
} else {
zend_message_dispatcher(ZMSG_FAILED_REQUIRE_FOPEN, Z_STRVAL_P(inc_filename));
}
} else {
switch (type) {
case ZEND_INCLUDE_ONCE:
case ZEND_REQUIRE_ONCE: {
zend_file_handle file_handle;
zend_string *resolved_path;
resolved_path = zend_resolve_path(Z_STRVAL_P(inc_filename), (int)Z_STRLEN_P(inc_filename));
if (resolved_path) {
if (zend_hash_exists(&EG(included_files), resolved_path)) {
goto already_compiled;
}
} else {
resolved_path = zend_string_copy(Z_STR_P(inc_filename));
}
if (SUCCESS == zend_stream_open(ZSTR_VAL(resolved_path), &file_handle)) {
if (!file_handle.opened_path) {
file_handle.opened_path = zend_string_copy(resolved_path);
}
if (zend_hash_add_empty_element(&EG(included_files), file_handle.opened_path)) {
zend_op_array *op_array = zend_compile_file(&file_handle, (type==ZEND_INCLUDE_ONCE?ZEND_INCLUDE:ZEND_REQUIRE));
zend_destroy_file_handle(&file_handle);
zend_string_release(resolved_path);
if (Z_TYPE(tmp_inc_filename) != IS_UNDEF) {
zend_string_release(Z_STR(tmp_inc_filename));
}
return op_array;
} else {
zend_file_handle_dtor(&file_handle);
already_compiled:
new_op_array = ZEND_FAKE_OP_ARRAY;
}
} else {
if (type == ZEND_INCLUDE_ONCE) {
zend_message_dispatcher(ZMSG_FAILED_INCLUDE_FOPEN, Z_STRVAL_P(inc_filename));
} else {
zend_message_dispatcher(ZMSG_FAILED_REQUIRE_FOPEN, Z_STRVAL_P(inc_filename));
}
}
zend_string_release(resolved_path);
}
break;
case ZEND_INCLUDE:
case ZEND_REQUIRE:
new_op_array = compile_filename(type, inc_filename);
break;
case ZEND_EVAL: {
char *eval_desc = zend_make_compiled_string_description("eval()'d code");
new_op_array = zend_compile_string(inc_filename, eval_desc);
efree(eval_desc);
}
break;
EMPTY_SWITCH_DEFAULT_CASE()
}
}
if (Z_TYPE(tmp_inc_filename) != IS_UNDEF) {
zend_string_release(Z_STR(tmp_inc_filename));
}
return new_op_array;
}
/* }}} */
static zend_never_inline int zend_do_fcall_overloaded(zend_function *fbc, zend_execute_data *call, zval *ret) /* {{{ */
{
zend_object *object;
/* Not sure what should be done here if it's a static method */
if (UNEXPECTED(Z_TYPE(call->This) != IS_OBJECT)) {
zend_vm_stack_free_args(call);
if (fbc->type == ZEND_OVERLOADED_FUNCTION_TEMPORARY) {
zend_string_release(fbc->common.function_name);
}
efree(fbc);
zend_vm_stack_free_call_frame(call);
zend_throw_error(NULL, "Cannot call overloaded function for non-object");
return 0;
}
object = Z_OBJ(call->This);
EG(scope) = fbc->common.scope;
ZVAL_NULL(ret);
EG(current_execute_data) = call;
object->handlers->call_method(fbc->common.function_name, object, call, ret);
EG(current_execute_data) = call->prev_execute_data;
zend_vm_stack_free_args(call);
if (fbc->type == ZEND_OVERLOADED_FUNCTION_TEMPORARY) {
zend_string_release(fbc->common.function_name);
}
efree(fbc);
return 1;
}
/* }}} */
#ifdef HAVE_GCC_GLOBAL_REGS
# if defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(i386)
# define ZEND_VM_FP_GLOBAL_REG "%esi"
# define ZEND_VM_IP_GLOBAL_REG "%edi"
# elif defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(__x86_64__)
# define ZEND_VM_FP_GLOBAL_REG "%r14"
# define ZEND_VM_IP_GLOBAL_REG "%r15"
# elif defined(__GNUC__) && ZEND_GCC_VERSION >= 4008 && defined(__powerpc64__)
# define ZEND_VM_FP_GLOBAL_REG "r28"
# define ZEND_VM_IP_GLOBAL_REG "r29"
# elif defined(__IBMC__) && ZEND_GCC_VERSION >= 4002 && defined(__powerpc64__)
# define ZEND_VM_FP_GLOBAL_REG "r28"
# define ZEND_VM_IP_GLOBAL_REG "r29"
# endif
#endif
#define ZEND_VM_NEXT_OPCODE_EX(check_exception, skip) \
CHECK_SYMBOL_TABLES() \
if (check_exception) { \
OPLINE = EX(opline) + (skip); \
} else { \
OPLINE = opline + (skip); \
} \
ZEND_VM_CONTINUE()
#define ZEND_VM_NEXT_OPCODE_CHECK_EXCEPTION() \
ZEND_VM_NEXT_OPCODE_EX(1, 1)
#define ZEND_VM_NEXT_OPCODE() \
ZEND_VM_NEXT_OPCODE_EX(0, 1)
#define ZEND_VM_SET_NEXT_OPCODE(new_op) \
CHECK_SYMBOL_TABLES() \
OPLINE = new_op
#define ZEND_VM_SET_OPCODE(new_op) \
CHECK_SYMBOL_TABLES() \
OPLINE = new_op; \
ZEND_VM_INTERRUPT_CHECK()
#define ZEND_VM_SET_RELATIVE_OPCODE(opline, offset) \
ZEND_VM_SET_OPCODE(ZEND_OFFSET_TO_OPLINE(opline, offset))
#define ZEND_VM_JMP(new_op) \
if (EXPECTED(!EG(exception))) { \
ZEND_VM_SET_OPCODE(new_op); \
} else { \
LOAD_OPLINE(); \
} \
ZEND_VM_CONTINUE()
#define ZEND_VM_INC_OPCODE() \
OPLINE++
#ifndef VM_SMART_OPCODES
# define VM_SMART_OPCODES 1
#endif
#if VM_SMART_OPCODES
# define ZEND_VM_REPEATABLE_OPCODE \
do {
# define ZEND_VM_REPEAT_OPCODE(_opcode) \
} while (UNEXPECTED((++opline)->opcode == _opcode)); \
OPLINE = opline; \
ZEND_VM_CONTINUE()
# define ZEND_VM_SMART_BRANCH(_result, _check) do { \
int __result; \
if (EXPECTED((opline+1)->opcode == ZEND_JMPZ)) { \
__result = (_result); \
} else if (EXPECTED((opline+1)->opcode == ZEND_JMPNZ)) { \
__result = !(_result); \
} else { \
break; \
} \
if ((_check) && UNEXPECTED(EG(exception))) { \
HANDLE_EXCEPTION(); \
} \
if (__result) { \
ZEND_VM_SET_NEXT_OPCODE(opline + 2); \
} else { \
ZEND_VM_SET_OPCODE(OP_JMP_ADDR(opline + 1, (opline+1)->op2)); \
} \
ZEND_VM_CONTINUE(); \
} while (0)
# define ZEND_VM_SMART_BRANCH_JMPZ(_result, _check) do { \
if ((_check) && UNEXPECTED(EG(exception))) { \
HANDLE_EXCEPTION(); \
} \
if (_result) { \
ZEND_VM_SET_NEXT_OPCODE(opline + 2); \
} else { \
ZEND_VM_SET_OPCODE(OP_JMP_ADDR(opline + 1, (opline+1)->op2)); \
} \
ZEND_VM_CONTINUE(); \
} while (0)
# define ZEND_VM_SMART_BRANCH_JMPNZ(_result, _check) do { \
if ((_check) && UNEXPECTED(EG(exception))) { \
HANDLE_EXCEPTION(); \
} \
if (!(_result)) { \
ZEND_VM_SET_NEXT_OPCODE(opline + 2); \
} else { \
ZEND_VM_SET_OPCODE(OP_JMP_ADDR(opline + 1, (opline+1)->op2)); \
} \
ZEND_VM_CONTINUE(); \
} while (0)
#else
# define ZEND_VM_REPEATABLE_OPCODE
# define ZEND_VM_REPEAT_OPCODE(_opcode)
# define ZEND_VM_SMART_BRANCH(_result, _check)
# define ZEND_VM_SMART_BRANCH_JMPZ(_result, _check)
# define ZEND_VM_SMART_BRANCH_JMPNZ(_result, _check)
#endif
#ifdef __GNUC__
# define ZEND_VM_GUARD(name) __asm__("#" #name)
#else
# define ZEND_VM_GUARD(name)
#endif
#define GET_OP1_UNDEF_CV(ptr, type) \
_get_zval_cv_lookup_ ## type(ptr, opline->op1.var, execute_data)
#define GET_OP2_UNDEF_CV(ptr, type) \
_get_zval_cv_lookup_ ## type(ptr, opline->op2.var, execute_data)
#include "zend_vm_execute.h"
ZEND_API int zend_set_user_opcode_handler(zend_uchar opcode, user_opcode_handler_t handler)
{
if (opcode != ZEND_USER_OPCODE) {
if (handler == NULL) {
/* restore the original handler */
zend_user_opcodes[opcode] = opcode;
} else {
zend_user_opcodes[opcode] = ZEND_USER_OPCODE;
}
zend_user_opcode_handlers[opcode] = handler;
return SUCCESS;
}
return FAILURE;
}
ZEND_API user_opcode_handler_t zend_get_user_opcode_handler(zend_uchar opcode)
{
return zend_user_opcode_handlers[opcode];
}
ZEND_API zval *zend_get_zval_ptr(int op_type, const znode_op *node, const zend_execute_data *execute_data, zend_free_op *should_free, int type)
{
return get_zval_ptr(op_type, *node, execute_data, should_free, type);
}
ZEND_API void ZEND_FASTCALL zend_check_internal_arg_type(zend_function *zf, uint32_t arg_num, zval *arg)
{
zend_verify_internal_arg_type(zf, arg_num, arg);
}
ZEND_API int ZEND_FASTCALL zend_check_arg_type(zend_function *zf, uint32_t arg_num, zval *arg, zval *default_value, void **cache_slot)
{
return zend_verify_arg_type(zf, arg_num, arg, default_value, cache_slot);
}
ZEND_API void ZEND_FASTCALL zend_check_missing_arg(zend_execute_data *execute_data, uint32_t arg_num, void **cache_slot)
{
zend_verify_missing_arg(execute_data, arg_num, cache_slot);
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
*/
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