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php-src/Zend/zend_compile.h
Nikita Popov b03cafd19c Fix bug #77966: Cannot alias a method named "namespace" 
This is a bit tricky: In this cases we have "namespace as", which
means that we will only recognize "namespace" as an identifier when
the lookahead token is already at the "as". This means that
zend_lex_tstring picks up the wrong identifier.

We solve this by actually assigning the identifier as the semantic
value on the parser stack -- as in almost all cases we will not
actually need the identifier, this is just an (offset, size)
reference, not a copy of the string.

Additionally, we need to teach the lexer feedback mechanism used
by tokenizer TOKEN_PARSE mode to apply feedback to something
other than the very last token. To that purpose we pass through
the token text and check the tokens in reverse order to find the
right one.

Closes GH-5668.
2020-06-08 12:55:14 +02:00

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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> |
+----------------------------------------------------------------------+
*/
#ifndef ZEND_COMPILE_H
#define ZEND_COMPILE_H
#include "zend.h"
#include "zend_ast.h"
#include <stdarg.h>
#include "zend_llist.h"
#define SET_UNUSED(op) op ## _type = IS_UNUSED
#define MAKE_NOP(opline) do { \
(opline)->op1.num = 0; \
(opline)->op2.num = 0; \
(opline)->result.num = 0; \
(opline)->opcode = ZEND_NOP; \
(opline)->op1_type = IS_UNUSED; \
(opline)->op2_type = IS_UNUSED; \
(opline)->result_type = IS_UNUSED; \
} while (0)
#define RESET_DOC_COMMENT() do { \
if (CG(doc_comment)) { \
zend_string_release_ex(CG(doc_comment), 0); \
CG(doc_comment) = NULL; \
} \
} while (0)
typedef struct _zend_op_array zend_op_array;
typedef struct _zend_op zend_op;
/* On 64-bit systems less optimal, but more compact VM code leads to better
* performance. So on 32-bit systems we use absolute addresses for jump
* targets and constants, but on 64-bit systems relative 32-bit offsets */
#if SIZEOF_SIZE_T == 4
# define ZEND_USE_ABS_JMP_ADDR 1
# define ZEND_USE_ABS_CONST_ADDR 1
#else
# define ZEND_USE_ABS_JMP_ADDR 0
# define ZEND_USE_ABS_CONST_ADDR 0
#endif
typedef union _znode_op {
uint32_t constant;
uint32_t var;
uint32_t num;
uint32_t opline_num; /* Needs to be signed */
#if ZEND_USE_ABS_JMP_ADDR
zend_op *jmp_addr;
#else
uint32_t jmp_offset;
#endif
#if ZEND_USE_ABS_CONST_ADDR
zval *zv;
#endif
} znode_op;
typedef struct _znode { /* used only during compilation */
zend_uchar op_type;
zend_uchar flag;
union {
znode_op op;
zval constant; /* replaced by literal/zv */
} u;
} znode;
/* Temporarily defined here, to avoid header ordering issues */
typedef struct _zend_ast_znode {
zend_ast_kind kind;
zend_ast_attr attr;
uint32_t lineno;
znode node;
} zend_ast_znode;
ZEND_API zend_ast * ZEND_FASTCALL zend_ast_create_znode(znode *node);
static zend_always_inline znode *zend_ast_get_znode(zend_ast *ast) {
return &((zend_ast_znode *) ast)->node;
}
typedef struct _zend_declarables {
zend_long ticks;
} zend_declarables;
/* Compilation context that is different for each file, but shared between op arrays. */
typedef struct _zend_file_context {
zend_declarables declarables;
zend_string *current_namespace;
zend_bool in_namespace;
zend_bool has_bracketed_namespaces;
HashTable *imports;
HashTable *imports_function;
HashTable *imports_const;
HashTable seen_symbols;
} zend_file_context;
typedef struct {
uint32_t offset;
uint32_t len;
} zend_lexer_ident_ref;
typedef union _zend_parser_stack_elem {
zend_ast *ast;
zend_string *str;
zend_ulong num;
unsigned char *ptr;
zend_lexer_ident_ref ident;
} zend_parser_stack_elem;
void zend_compile_top_stmt(zend_ast *ast);
void zend_compile_stmt(zend_ast *ast);
void zend_compile_expr(znode *node, zend_ast *ast);
zend_op *zend_compile_var(znode *node, zend_ast *ast, uint32_t type, int by_ref);
void zend_eval_const_expr(zend_ast **ast_ptr);
void zend_const_expr_to_zval(zval *result, zend_ast *ast);
typedef int (*user_opcode_handler_t) (zend_execute_data *execute_data);
struct _zend_op {
const void *handler;
znode_op op1;
znode_op op2;
znode_op result;
uint32_t extended_value;
uint32_t lineno;
zend_uchar opcode;
zend_uchar op1_type;
zend_uchar op2_type;
zend_uchar result_type;
};
typedef struct _zend_brk_cont_element {
int start;
int cont;
int brk;
int parent;
zend_bool is_switch;
} zend_brk_cont_element;
typedef struct _zend_label {
int brk_cont;
uint32_t opline_num;
} zend_label;
typedef struct _zend_try_catch_element {
uint32_t try_op;
uint32_t catch_op; /* ketchup! */
uint32_t finally_op;
uint32_t finally_end;
} zend_try_catch_element;
#define ZEND_LIVE_TMPVAR 0
#define ZEND_LIVE_LOOP 1
#define ZEND_LIVE_SILENCE 2
#define ZEND_LIVE_ROPE 3
#define ZEND_LIVE_NEW 4
#define ZEND_LIVE_MASK 7
typedef struct _zend_live_range {
uint32_t var; /* low bits are used for variable type (ZEND_LIVE_* macros) */
uint32_t start;
uint32_t end;
} zend_live_range;
/* Compilation context that is different for each op array. */
typedef struct _zend_oparray_context {
uint32_t opcodes_size;
int vars_size;
int literals_size;
uint32_t fast_call_var;
uint32_t try_catch_offset;
int current_brk_cont;
int last_brk_cont;
zend_brk_cont_element *brk_cont_array;
HashTable *labels;
} zend_oparray_context;
/* Class, property and method flags class|meth.|prop.|const*/
/* | | | */
/* Common flags | | | */
/* ============ | | | */
/* | | | */
/* Visibility flags (public < protected < private) | | | */
#define ZEND_ACC_PUBLIC (1 << 0) /* | X | X | X */
#define ZEND_ACC_PROTECTED (1 << 1) /* | X | X | X */
#define ZEND_ACC_PRIVATE (1 << 2) /* | X | X | X */
/* | | | */
/* Property or method overrides private one | | | */
#define ZEND_ACC_CHANGED (1 << 3) /* | X | X | */
/* | | | */
/* Static method or property | | | */
#define ZEND_ACC_STATIC (1 << 4) /* | X | X | */
/* | | | */
/* Promoted property / parameter | | | */
#define ZEND_ACC_PROMOTED (1 << 5) /* | | X | X */
/* | | | */
/* Final class or method | | | */
#define ZEND_ACC_FINAL (1 << 5) /* X | X | | */
/* | | | */
/* Abstract method | | | */
#define ZEND_ACC_ABSTRACT (1 << 6) /* X | X | | */
#define ZEND_ACC_EXPLICIT_ABSTRACT_CLASS (1 << 6) /* X | | | */
/* | | | */
/* Immutable op_array and class_entries | | | */
/* (implemented only for lazy loading of op_arrays) | | | */
#define ZEND_ACC_IMMUTABLE (1 << 7) /* X | X | | */
/* | | | */
/* Function has typed arguments / class has typed props | | | */
#define ZEND_ACC_HAS_TYPE_HINTS (1 << 8) /* X | X | | */
/* | | | */
/* Top-level class or function declaration | | | */
#define ZEND_ACC_TOP_LEVEL (1 << 9) /* X | X | | */
/* | | | */
/* op_array or class is preloaded | | | */
#define ZEND_ACC_PRELOADED (1 << 10) /* X | X | | */
/* | | | */
/* Class Flags (unused: 13, 14, 15, 24...) | | | */
/* =========== | | | */
/* | | | */
/* Special class types | | | */
#define ZEND_ACC_INTERFACE (1 << 0) /* X | | | */
#define ZEND_ACC_TRAIT (1 << 1) /* X | | | */
#define ZEND_ACC_ANON_CLASS (1 << 2) /* X | | | */
/* | | | */
/* Class linked with parent, interfaces and traits | | | */
#define ZEND_ACC_LINKED (1 << 3) /* X | | | */
/* | | | */
/* Class is abstract, since it is set by any | | | */
/* abstract method | | | */
#define ZEND_ACC_IMPLICIT_ABSTRACT_CLASS (1 << 4) /* X | | | */
/* | | | */
/* Class has magic methods __get/__set/__unset/ | | | */
/* __isset that use guards | | | */
#define ZEND_ACC_USE_GUARDS (1 << 11) /* X | | | */
/* | | | */
/* Class constants updated | | | */
#define ZEND_ACC_CONSTANTS_UPDATED (1 << 12) /* X | | | */
/* | | | */
/* User class has methods with static variables | | | */
#define ZEND_HAS_STATIC_IN_METHODS (1 << 16) /* X | | | */
/* | | | */
/* Whether all property types are resolved to CEs | | | */
#define ZEND_ACC_PROPERTY_TYPES_RESOLVED (1 << 17) /* X | | | */
/* | | | */
/* Children must reuse parent get_iterator() | | | */
#define ZEND_ACC_REUSE_GET_ITERATOR (1 << 18) /* X | | | */
/* | | | */
/* Parent class is resolved (CE). | | | */
#define ZEND_ACC_RESOLVED_PARENT (1 << 19) /* X | | | */
/* | | | */
/* Interfaces are resolved (CEs). | | | */
#define ZEND_ACC_RESOLVED_INTERFACES (1 << 20) /* X | | | */
/* | | | */
/* Class has unresolved variance obligations. | | | */
#define ZEND_ACC_UNRESOLVED_VARIANCE (1 << 21) /* X | | | */
/* | | | */
/* Class is linked apart from variance obligations. | | | */
#define ZEND_ACC_NEARLY_LINKED (1 << 22) /* X | | | */
/* | | | */
/* Whether this class was used in its unlinked state. | | | */
#define ZEND_ACC_HAS_UNLINKED_USES (1 << 23) /* X | | | */
/* | | | */
/* Function Flags (unused: 17, 23, 26, 29) | | | */
/* ============== | | | */
/* | | | */
/* deprecation flag | | | */
#define ZEND_ACC_DEPRECATED (1 << 11) /* | X | | */
/* | | | */
/* Function returning by reference | | | */
#define ZEND_ACC_RETURN_REFERENCE (1 << 12) /* | X | | */
/* | | | */
/* Function has a return type | | | */
#define ZEND_ACC_HAS_RETURN_TYPE (1 << 13) /* | X | | */
/* | | | */
/* Function with variable number of arguments | | | */
#define ZEND_ACC_VARIADIC (1 << 14) /* | X | | */
/* | | | */
/* op_array has finally blocks (user only) | | | */
#define ZEND_ACC_HAS_FINALLY_BLOCK (1 << 15) /* | X | | */
/* | | | */
/* "main" op_array with | | | */
/* ZEND_DECLARE_CLASS_DELAYED opcodes | | | */
#define ZEND_ACC_EARLY_BINDING (1 << 16) /* | X | | */
/* | | | */
/* call through user function trampoline. e.g. | | | */
/* __call, __callstatic | | | */
#define ZEND_ACC_CALL_VIA_TRAMPOLINE (1 << 18) /* | X | | */
/* | | | */
/* disable inline caching | | | */
#define ZEND_ACC_NEVER_CACHE (1 << 19) /* | X | | */
/* | | | */
/* Closure related | | | */
#define ZEND_ACC_CLOSURE (1 << 20) /* | X | | */
#define ZEND_ACC_FAKE_CLOSURE (1 << 21) /* | X | | */
/* | | | */
/* run_time_cache allocated on heap (user only) | | | */
#define ZEND_ACC_HEAP_RT_CACHE (1 << 22) /* | X | | */
/* | | | */
/* method flag used by Closure::__invoke() (int only) | | | */
#define ZEND_ACC_USER_ARG_INFO (1 << 22) /* | X | | */
/* | | | */
#define ZEND_ACC_GENERATOR (1 << 24) /* | X | | */
/* | | | */
/* function was processed by pass two (user only) | | | */
#define ZEND_ACC_DONE_PASS_TWO (1 << 25) /* | X | | */
/* | | | */
/* internal function is allocated at arena (int only) | | | */
#define ZEND_ACC_ARENA_ALLOCATED (1 << 25) /* | X | | */
/* | | | */
/* op_array is a clone of trait method | | | */
#define ZEND_ACC_TRAIT_CLONE (1 << 27) /* | X | | */
/* | | | */
/* functions is a constructor | | | */
#define ZEND_ACC_CTOR (1 << 28) /* | X | | */
/* | | | */
/* closure uses $this | | | */
#define ZEND_ACC_USES_THIS (1 << 30) /* | X | | */
/* | | | */
/* op_array uses strict mode types | | | */
#define ZEND_ACC_STRICT_TYPES (1U << 31) /* | X | | */
#define ZEND_ACC_PPP_MASK (ZEND_ACC_PUBLIC | ZEND_ACC_PROTECTED | ZEND_ACC_PRIVATE)
/* call through internal function handler. e.g. Closure::invoke() */
#define ZEND_ACC_CALL_VIA_HANDLER ZEND_ACC_CALL_VIA_TRAMPOLINE
char *zend_visibility_string(uint32_t fn_flags);
typedef struct _zend_property_info {
uint32_t offset; /* property offset for object properties or
property index for static properties */
uint32_t flags;
zend_string *name;
zend_string *doc_comment;
HashTable *attributes;
zend_class_entry *ce;
zend_type type;
} zend_property_info;
#define OBJ_PROP(obj, offset) \
((zval*)((char*)(obj) + offset))
#define OBJ_PROP_NUM(obj, num) \
(&(obj)->properties_table[(num)])
#define OBJ_PROP_TO_OFFSET(num) \
((uint32_t)(XtOffsetOf(zend_object, properties_table) + sizeof(zval) * (num)))
#define OBJ_PROP_TO_NUM(offset) \
((offset - OBJ_PROP_TO_OFFSET(0)) / sizeof(zval))
typedef struct _zend_class_constant {
zval value; /* access flags are stored in reserved: zval.u2.access_flags */
zend_string *doc_comment;
HashTable *attributes;
zend_class_entry *ce;
} zend_class_constant;
/* arg_info for internal functions */
typedef struct _zend_internal_arg_info {
const char *name;
zend_type type;
const char *default_value;
} zend_internal_arg_info;
/* arg_info for user functions */
typedef struct _zend_arg_info {
zend_string *name;
zend_type type;
zend_string *default_value;
} zend_arg_info;
/* the following structure repeats the layout of zend_internal_arg_info,
* but its fields have different meaning. It's used as the first element of
* arg_info array to define properties of internal functions.
* It's also used for the return type.
*/
typedef struct _zend_internal_function_info {
zend_uintptr_t required_num_args;
zend_type type;
const char *default_value;
} zend_internal_function_info;
struct _zend_op_array {
/* Common elements */
zend_uchar type;
zend_uchar arg_flags[3]; /* bitset of arg_info.pass_by_reference */
uint32_t fn_flags;
zend_string *function_name;
zend_class_entry *scope;
zend_function *prototype;
uint32_t num_args;
uint32_t required_num_args;
zend_arg_info *arg_info;
HashTable *attributes;
/* END of common elements */
int cache_size; /* number of run_time_cache_slots * sizeof(void*) */
int last_var; /* number of CV variables */
uint32_t T; /* number of temporary variables */
uint32_t last; /* number of opcodes */
zend_op *opcodes;
ZEND_MAP_PTR_DEF(void **, run_time_cache);
ZEND_MAP_PTR_DEF(HashTable *, static_variables_ptr);
HashTable *static_variables;
zend_string **vars; /* names of CV variables */
uint32_t *refcount;
int last_live_range;
int last_try_catch;
zend_live_range *live_range;
zend_try_catch_element *try_catch_array;
zend_string *filename;
uint32_t line_start;
uint32_t line_end;
zend_string *doc_comment;
int last_literal;
zval *literals;
void *reserved[ZEND_MAX_RESERVED_RESOURCES];
};
#define ZEND_RETURN_VALUE 0
#define ZEND_RETURN_REFERENCE 1
/* zend_internal_function_handler */
typedef void (ZEND_FASTCALL *zif_handler)(INTERNAL_FUNCTION_PARAMETERS);
typedef struct _zend_internal_function {
/* Common elements */
zend_uchar type;
zend_uchar arg_flags[3]; /* bitset of arg_info.pass_by_reference */
uint32_t fn_flags;
zend_string* function_name;
zend_class_entry *scope;
zend_function *prototype;
uint32_t num_args;
uint32_t required_num_args;
zend_internal_arg_info *arg_info;
HashTable *attributes;
/* END of common elements */
zif_handler handler;
struct _zend_module_entry *module;
void *reserved[ZEND_MAX_RESERVED_RESOURCES];
} zend_internal_function;
#define ZEND_FN_SCOPE_NAME(function) ((function) && (function)->common.scope ? ZSTR_VAL((function)->common.scope->name) : "")
union _zend_function {
zend_uchar type; /* MUST be the first element of this struct! */
uint32_t quick_arg_flags;
struct {
zend_uchar type; /* never used */
zend_uchar arg_flags[3]; /* bitset of arg_info.pass_by_reference */
uint32_t fn_flags;
zend_string *function_name;
zend_class_entry *scope;
zend_function *prototype;
uint32_t num_args;
uint32_t required_num_args;
zend_arg_info *arg_info; /* index -1 represents the return value info, if any */
HashTable *attributes;
} common;
zend_op_array op_array;
zend_internal_function internal_function;
};
struct _zend_execute_data {
const zend_op *opline; /* executed opline */
zend_execute_data *call; /* current call */
zval *return_value;
zend_function *func; /* executed function */
zval This; /* this + call_info + num_args */
zend_execute_data *prev_execute_data;
zend_array *symbol_table;
void **run_time_cache; /* cache op_array->run_time_cache */
};
#define ZEND_CALL_HAS_THIS IS_OBJECT_EX
/* Top 16 bits of Z_TYPE_INFO(EX(This)) are used as call_info flags */
#define ZEND_CALL_FUNCTION (0 << 16)
#define ZEND_CALL_CODE (1 << 16)
#define ZEND_CALL_NESTED (0 << 17)
#define ZEND_CALL_TOP (1 << 17)
#define ZEND_CALL_ALLOCATED (1 << 18)
#define ZEND_CALL_FREE_EXTRA_ARGS (1 << 19)
#define ZEND_CALL_HAS_SYMBOL_TABLE (1 << 20)
#define ZEND_CALL_RELEASE_THIS (1 << 21)
#define ZEND_CALL_CLOSURE (1 << 22)
#define ZEND_CALL_FAKE_CLOSURE (1 << 23)
#define ZEND_CALL_GENERATOR (1 << 24)
#define ZEND_CALL_DYNAMIC (1 << 25)
#define ZEND_CALL_SEND_ARG_BY_REF (1u << 31)
#define ZEND_CALL_NESTED_FUNCTION (ZEND_CALL_FUNCTION | ZEND_CALL_NESTED)
#define ZEND_CALL_NESTED_CODE (ZEND_CALL_CODE | ZEND_CALL_NESTED)
#define ZEND_CALL_TOP_FUNCTION (ZEND_CALL_TOP | ZEND_CALL_FUNCTION)
#define ZEND_CALL_TOP_CODE (ZEND_CALL_CODE | ZEND_CALL_TOP)
#define ZEND_CALL_INFO(call) \
Z_TYPE_INFO((call)->This)
#define ZEND_CALL_KIND_EX(call_info) \
(call_info & (ZEND_CALL_CODE | ZEND_CALL_TOP))
#define ZEND_CALL_KIND(call) \
ZEND_CALL_KIND_EX(ZEND_CALL_INFO(call))
#define ZEND_ADD_CALL_FLAG_EX(call_info, flag) do { \
call_info |= (flag); \
} while (0)
#define ZEND_DEL_CALL_FLAG_EX(call_info, flag) do { \
call_info &= ~(flag); \
} while (0)
#define ZEND_ADD_CALL_FLAG(call, flag) do { \
ZEND_ADD_CALL_FLAG_EX(Z_TYPE_INFO((call)->This), flag); \
} while (0)
#define ZEND_DEL_CALL_FLAG(call, flag) do { \
ZEND_DEL_CALL_FLAG_EX(Z_TYPE_INFO((call)->This), flag); \
} while (0)
#define ZEND_CALL_NUM_ARGS(call) \
(call)->This.u2.num_args
#define ZEND_CALL_FRAME_SLOT \
((int)((ZEND_MM_ALIGNED_SIZE(sizeof(zend_execute_data)) + ZEND_MM_ALIGNED_SIZE(sizeof(zval)) - 1) / ZEND_MM_ALIGNED_SIZE(sizeof(zval))))
#define ZEND_CALL_VAR(call, n) \
((zval*)(((char*)(call)) + ((int)(n))))
#define ZEND_CALL_VAR_NUM(call, n) \
(((zval*)(call)) + (ZEND_CALL_FRAME_SLOT + ((int)(n))))
#define ZEND_CALL_ARG(call, n) \
ZEND_CALL_VAR_NUM(call, ((int)(n)) - 1)
#define EX(element) ((execute_data)->element)
#define EX_CALL_INFO() ZEND_CALL_INFO(execute_data)
#define EX_CALL_KIND() ZEND_CALL_KIND(execute_data)
#define EX_NUM_ARGS() ZEND_CALL_NUM_ARGS(execute_data)
#define ZEND_CALL_USES_STRICT_TYPES(call) \
(((call)->func->common.fn_flags & ZEND_ACC_STRICT_TYPES) != 0)
#define EX_USES_STRICT_TYPES() \
ZEND_CALL_USES_STRICT_TYPES(execute_data)
#define ZEND_ARG_USES_STRICT_TYPES() \
(EG(current_execute_data)->prev_execute_data && \
EG(current_execute_data)->prev_execute_data->func && \
ZEND_CALL_USES_STRICT_TYPES(EG(current_execute_data)->prev_execute_data))
#define ZEND_RET_USES_STRICT_TYPES() \
ZEND_CALL_USES_STRICT_TYPES(EG(current_execute_data))
#define EX_VAR(n) ZEND_CALL_VAR(execute_data, n)
#define EX_VAR_NUM(n) ZEND_CALL_VAR_NUM(execute_data, n)
#define EX_VAR_TO_NUM(n) ((uint32_t)((n) / sizeof(zval) - ZEND_CALL_FRAME_SLOT))
#define EX_NUM_TO_VAR(n) ((uint32_t)(((n) + ZEND_CALL_FRAME_SLOT) * sizeof(zval)))
#define ZEND_OPLINE_TO_OFFSET(opline, target) \
((char*)(target) - (char*)(opline))
#define ZEND_OPLINE_NUM_TO_OFFSET(op_array, opline, opline_num) \
((char*)&(op_array)->opcodes[opline_num] - (char*)(opline))
#define ZEND_OFFSET_TO_OPLINE(base, offset) \
((zend_op*)(((char*)(base)) + (int)offset))
#define ZEND_OFFSET_TO_OPLINE_NUM(op_array, base, offset) \
(ZEND_OFFSET_TO_OPLINE(base, offset) - op_array->opcodes)
#if ZEND_USE_ABS_JMP_ADDR
/* run-time jump target */
# define OP_JMP_ADDR(opline, node) \
(node).jmp_addr
# define ZEND_SET_OP_JMP_ADDR(opline, node, val) do { \
(node).jmp_addr = (val); \
} while (0)
/* convert jump target from compile-time to run-time */
# define ZEND_PASS_TWO_UPDATE_JMP_TARGET(op_array, opline, node) do { \
(node).jmp_addr = (op_array)->opcodes + (node).opline_num; \
} while (0)
/* convert jump target back from run-time to compile-time */
# define ZEND_PASS_TWO_UNDO_JMP_TARGET(op_array, opline, node) do { \
(node).opline_num = (node).jmp_addr - (op_array)->opcodes; \
} while (0)
#else
/* run-time jump target */
# define OP_JMP_ADDR(opline, node) \
ZEND_OFFSET_TO_OPLINE(opline, (node).jmp_offset)
# define ZEND_SET_OP_JMP_ADDR(opline, node, val) do { \
(node).jmp_offset = ZEND_OPLINE_TO_OFFSET(opline, val); \
} while (0)
/* convert jump target from compile-time to run-time */
# define ZEND_PASS_TWO_UPDATE_JMP_TARGET(op_array, opline, node) do { \
(node).jmp_offset = ZEND_OPLINE_NUM_TO_OFFSET(op_array, opline, (node).opline_num); \
} while (0)
/* convert jump target back from run-time to compile-time */
# define ZEND_PASS_TWO_UNDO_JMP_TARGET(op_array, opline, node) do { \
(node).opline_num = ZEND_OFFSET_TO_OPLINE_NUM(op_array, opline, (node).jmp_offset); \
} while (0)
#endif
/* constant-time constant */
# define CT_CONSTANT_EX(op_array, num) \
((op_array)->literals + (num))
# define CT_CONSTANT(node) \
CT_CONSTANT_EX(CG(active_op_array), (node).constant)
#if ZEND_USE_ABS_CONST_ADDR
/* run-time constant */
# define RT_CONSTANT(opline, node) \
(node).zv
/* convert constant from compile-time to run-time */
# define ZEND_PASS_TWO_UPDATE_CONSTANT(op_array, opline, node) do { \
(node).zv = CT_CONSTANT_EX(op_array, (node).constant); \
} while (0)
#else
/* At run-time, constants are allocated together with op_array->opcodes
* and addressed relatively to current opline.
*/
/* run-time constant */
# define RT_CONSTANT(opline, node) \
((zval*)(((char*)(opline)) + (int32_t)(node).constant))
/* convert constant from compile-time to run-time */
# define ZEND_PASS_TWO_UPDATE_CONSTANT(op_array, opline, node) do { \
(node).constant = \
(((char*)CT_CONSTANT_EX(op_array, (node).constant)) - \
((char*)opline)); \
} while (0)
#endif
/* convert constant back from run-time to compile-time */
#define ZEND_PASS_TWO_UNDO_CONSTANT(op_array, opline, node) do { \
(node).constant = RT_CONSTANT(opline, node) - (op_array)->literals; \
} while (0)
#define RUN_TIME_CACHE(op_array) \
ZEND_MAP_PTR_GET((op_array)->run_time_cache)
#define ZEND_OP_ARRAY_EXTENSION(op_array, handle) \
((void**)RUN_TIME_CACHE(op_array))[handle]
#define IS_UNUSED 0 /* Unused operand */
#define IS_CONST (1<<0)
#define IS_TMP_VAR (1<<1)
#define IS_VAR (1<<2)
#define IS_CV (1<<3) /* Compiled variable */
/* Used for result.type of smart branch instructions */
#define IS_SMART_BRANCH_JMPZ (1<<4)
#define IS_SMART_BRANCH_JMPNZ (1<<5)
#define ZEND_EXTRA_VALUE 1
#include "zend_globals.h"
BEGIN_EXTERN_C()
void init_compiler(void);
void shutdown_compiler(void);
void zend_init_compiler_data_structures(void);
void zend_oparray_context_begin(zend_oparray_context *prev_context);
void zend_oparray_context_end(zend_oparray_context *prev_context);
void zend_file_context_begin(zend_file_context *prev_context);
void zend_file_context_end(zend_file_context *prev_context);
extern ZEND_API zend_op_array *(*zend_compile_file)(zend_file_handle *file_handle, int type);
extern ZEND_API zend_op_array *(*zend_compile_string)(zval *source_string, const char *filename);
ZEND_API int ZEND_FASTCALL lex_scan(zval *zendlval, zend_parser_stack_elem *elem);
void startup_scanner(void);
void shutdown_scanner(void);
ZEND_API zend_string *zend_set_compiled_filename(zend_string *new_compiled_filename);
ZEND_API void zend_restore_compiled_filename(zend_string *original_compiled_filename);
ZEND_API zend_string *zend_get_compiled_filename(void);
ZEND_API int zend_get_compiled_lineno(void);
ZEND_API size_t zend_get_scanned_file_offset(void);
ZEND_API zend_string *zend_get_compiled_variable_name(const zend_op_array *op_array, uint32_t var);
#ifdef ZTS
const char *zend_get_zendtext(void);
int zend_get_zendleng(void);
#endif
typedef int (ZEND_FASTCALL *unary_op_type)(zval *, zval *);
typedef int (ZEND_FASTCALL *binary_op_type)(zval *, zval *, zval *);
ZEND_API unary_op_type get_unary_op(int opcode);
ZEND_API binary_op_type get_binary_op(int opcode);
void zend_stop_lexing(void);
void zend_emit_final_return(int return_one);
/* Used during AST construction */
zend_ast *zend_ast_append_str(zend_ast *left, zend_ast *right);
zend_ast *zend_negate_num_string(zend_ast *ast);
uint32_t zend_add_class_modifier(uint32_t flags, uint32_t new_flag);
uint32_t zend_add_member_modifier(uint32_t flags, uint32_t new_flag);
zend_bool zend_handle_encoding_declaration(zend_ast *ast);
/* parser-driven code generators */
void zend_do_free(znode *op1);
ZEND_API int do_bind_function(zval *lcname);
ZEND_API int do_bind_class(zval *lcname, zend_string *lc_parent_name);
ZEND_API uint32_t zend_build_delayed_early_binding_list(const zend_op_array *op_array);
ZEND_API void zend_do_delayed_early_binding(zend_op_array *op_array, uint32_t first_early_binding_opline);
void zend_do_extended_info(void);
void zend_do_extended_fcall_begin(void);
void zend_do_extended_fcall_end(void);
void zend_verify_namespace(void);
void zend_resolve_goto_label(zend_op_array *op_array, zend_op *opline);
ZEND_API void function_add_ref(zend_function *function);
#define INITIAL_OP_ARRAY_SIZE 64
/* helper functions in zend_language_scanner.l */
struct _zend_arena;
ZEND_API zend_op_array *compile_file(zend_file_handle *file_handle, int type);
ZEND_API zend_op_array *compile_string(zval *source_string, const char *filename);
ZEND_API zend_op_array *compile_filename(int type, zval *filename);
ZEND_API zend_ast *zend_compile_string_to_ast(
zend_string *code, struct _zend_arena **ast_arena, const char *filename);
ZEND_API int zend_execute_scripts(int type, zval *retval, int file_count, ...);
ZEND_API int open_file_for_scanning(zend_file_handle *file_handle);
ZEND_API void init_op_array(zend_op_array *op_array, zend_uchar type, int initial_ops_size);
ZEND_API void destroy_op_array(zend_op_array *op_array);
ZEND_API void zend_destroy_file_handle(zend_file_handle *file_handle);
ZEND_API void zend_cleanup_internal_class_data(zend_class_entry *ce);
ZEND_API void zend_cleanup_internal_classes(void);
ZEND_API void zend_type_release(zend_type type, zend_bool persistent);
ZEND_API zend_string *zend_create_member_string(zend_string *class_name, zend_string *member_name);
ZEND_API ZEND_COLD void zend_user_exception_handler(void);
#define zend_try_exception_handler() do { \
if (UNEXPECTED(EG(exception))) { \
if (Z_TYPE(EG(user_exception_handler)) != IS_UNDEF) { \
zend_user_exception_handler(); \
} \
} \
} while (0)
void zend_free_internal_arg_info(zend_internal_function *function);
ZEND_API void destroy_zend_function(zend_function *function);
ZEND_API void zend_function_dtor(zval *zv);
ZEND_API void destroy_zend_class(zval *zv);
void zend_class_add_ref(zval *zv);
ZEND_API zend_string *zend_mangle_property_name(const char *src1, size_t src1_length, const char *src2, size_t src2_length, int internal);
#define zend_unmangle_property_name(mangled_property, class_name, prop_name) \
zend_unmangle_property_name_ex(mangled_property, class_name, prop_name, NULL)
ZEND_API int zend_unmangle_property_name_ex(const zend_string *name, const char **class_name, const char **prop_name, size_t *prop_len);
static zend_always_inline const char *zend_get_unmangled_property_name(const zend_string *mangled_prop) {
const char *class_name, *prop_name;
zend_unmangle_property_name(mangled_prop, &class_name, &prop_name);
return prop_name;
}
#define ZEND_FUNCTION_DTOR zend_function_dtor
#define ZEND_CLASS_DTOR destroy_zend_class
typedef zend_bool (*zend_needs_live_range_cb)(zend_op_array *op_array, zend_op *opline);
ZEND_API void zend_recalc_live_ranges(
zend_op_array *op_array, zend_needs_live_range_cb needs_live_range);
ZEND_API int pass_two(zend_op_array *op_array);
ZEND_API zend_bool zend_is_compiling(void);
ZEND_API char *zend_make_compiled_string_description(const char *name);
ZEND_API void zend_initialize_class_data(zend_class_entry *ce, zend_bool nullify_handlers);
uint32_t zend_get_class_fetch_type(zend_string *name);
ZEND_API zend_uchar zend_get_call_op(const zend_op *init_op, zend_function *fbc);
ZEND_API int zend_is_smart_branch(const zend_op *opline);
typedef zend_bool (*zend_auto_global_callback)(zend_string *name);
typedef struct _zend_auto_global {
zend_string *name;
zend_auto_global_callback auto_global_callback;
zend_bool jit;
zend_bool armed;
} zend_auto_global;
ZEND_API int zend_register_auto_global(zend_string *name, zend_bool jit, zend_auto_global_callback auto_global_callback);
ZEND_API void zend_activate_auto_globals(void);
ZEND_API zend_bool zend_is_auto_global(zend_string *name);
ZEND_API zend_bool zend_is_auto_global_str(const char *name, size_t len);
ZEND_API size_t zend_dirname(char *path, size_t len);
ZEND_API void zend_set_function_arg_flags(zend_function *func);
int ZEND_FASTCALL zendlex(zend_parser_stack_elem *elem);
void zend_assert_valid_class_name(const zend_string *const_name);
zend_string *zend_type_to_string_resolved(zend_type type, zend_class_entry *scope);
ZEND_API zend_string *zend_type_to_string(zend_type type);
/* BEGIN: OPCODES */
#include "zend_vm_opcodes.h"
/* END: OPCODES */
/* class fetches */
#define ZEND_FETCH_CLASS_DEFAULT 0
#define ZEND_FETCH_CLASS_SELF 1
#define ZEND_FETCH_CLASS_PARENT 2
#define ZEND_FETCH_CLASS_STATIC 3
#define ZEND_FETCH_CLASS_AUTO 4
#define ZEND_FETCH_CLASS_INTERFACE 5
#define ZEND_FETCH_CLASS_TRAIT 6
#define ZEND_FETCH_CLASS_MASK 0x0f
#define ZEND_FETCH_CLASS_NO_AUTOLOAD 0x80
#define ZEND_FETCH_CLASS_SILENT 0x0100
#define ZEND_FETCH_CLASS_EXCEPTION 0x0200
#define ZEND_FETCH_CLASS_ALLOW_UNLINKED 0x0400
#define ZEND_FETCH_CLASS_ALLOW_NEARLY_LINKED 0x0800
/* These should not clash with ZEND_ACC_(PUBLIC|PROTECTED|PRIVATE) */
#define ZEND_PARAM_REF (1<<3)
#define ZEND_PARAM_VARIADIC (1<<4)
#define ZEND_NAME_FQ 0
#define ZEND_NAME_NOT_FQ 1
#define ZEND_NAME_RELATIVE 2
#define ZEND_TYPE_NULLABLE (1<<8)
#define ZEND_ARRAY_SYNTAX_LIST 1 /* list() */
#define ZEND_ARRAY_SYNTAX_LONG 2 /* array() */
#define ZEND_ARRAY_SYNTAX_SHORT 3 /* [] */
/* var status for backpatching */
#define BP_VAR_R 0
#define BP_VAR_W 1
#define BP_VAR_RW 2
#define BP_VAR_IS 3
#define BP_VAR_FUNC_ARG 4
#define BP_VAR_UNSET 5
#define ZEND_INTERNAL_FUNCTION 1
#define ZEND_USER_FUNCTION 2
#define ZEND_EVAL_CODE 4
#define ZEND_USER_CODE(type) ((type) != ZEND_INTERNAL_FUNCTION)
#define ZEND_INTERNAL_CLASS 1
#define ZEND_USER_CLASS 2
#define ZEND_EVAL (1<<0)
#define ZEND_INCLUDE (1<<1)
#define ZEND_INCLUDE_ONCE (1<<2)
#define ZEND_REQUIRE (1<<3)
#define ZEND_REQUIRE_ONCE (1<<4)
/* global/local fetches */
#define ZEND_FETCH_GLOBAL (1<<1)
#define ZEND_FETCH_LOCAL (1<<2)
#define ZEND_FETCH_GLOBAL_LOCK (1<<3)
#define ZEND_FETCH_TYPE_MASK 0xe
/* Only one of these can ever be in use */
#define ZEND_FETCH_REF 1
#define ZEND_FETCH_DIM_WRITE 2
#define ZEND_FETCH_OBJ_FLAGS 3
#define ZEND_ISEMPTY (1<<0)
#define ZEND_LAST_CATCH (1<<0)
#define ZEND_FREE_ON_RETURN (1<<0)
#define ZEND_FREE_SWITCH (1<<1)
#define ZEND_SEND_BY_VAL 0u
#define ZEND_SEND_BY_REF 1u
#define ZEND_SEND_PREFER_REF 2u
#define ZEND_THROW_IS_EXPR 1u
/* The send mode and is_variadic flag are stored as part of zend_type */
#define _ZEND_SEND_MODE_SHIFT _ZEND_TYPE_EXTRA_FLAGS_SHIFT
#define _ZEND_IS_VARIADIC_BIT (1 << (_ZEND_TYPE_EXTRA_FLAGS_SHIFT + 2))
#define _ZEND_IS_PROMOTED_BIT (1 << (_ZEND_TYPE_EXTRA_FLAGS_SHIFT + 3))
#define ZEND_ARG_SEND_MODE(arg_info) \
((ZEND_TYPE_FULL_MASK((arg_info)->type) >> _ZEND_SEND_MODE_SHIFT) & 3)
#define ZEND_ARG_IS_VARIADIC(arg_info) \
((ZEND_TYPE_FULL_MASK((arg_info)->type) & _ZEND_IS_VARIADIC_BIT) != 0)
#define ZEND_ARG_IS_PROMOTED(arg_info) \
((ZEND_TYPE_FULL_MASK((arg_info)->type) & _ZEND_IS_PROMOTED_BIT) != 0)
#define ZEND_DIM_IS (1 << 0) /* isset fetch needed for null coalesce */
#define ZEND_DIM_ALTERNATIVE_SYNTAX (1 << 1) /* deprecated curly brace usage */
/* Make sure these don't clash with ZEND_FETCH_CLASS_* flags. */
#define IS_CONSTANT_CLASS 0x400 /* __CLASS__ in trait */
#define IS_CONSTANT_UNQUALIFIED_IN_NAMESPACE 0x800
static zend_always_inline int zend_check_arg_send_type(const zend_function *zf, uint32_t arg_num, uint32_t mask)
{
arg_num--;
if (UNEXPECTED(arg_num >= zf->common.num_args)) {
if (EXPECTED((zf->common.fn_flags & ZEND_ACC_VARIADIC) == 0)) {
return 0;
}
arg_num = zf->common.num_args;
}
return UNEXPECTED((ZEND_ARG_SEND_MODE(&zf->common.arg_info[arg_num]) & mask) != 0);
}
#define ARG_MUST_BE_SENT_BY_REF(zf, arg_num) \
zend_check_arg_send_type(zf, arg_num, ZEND_SEND_BY_REF)
#define ARG_SHOULD_BE_SENT_BY_REF(zf, arg_num) \
zend_check_arg_send_type(zf, arg_num, ZEND_SEND_BY_REF|ZEND_SEND_PREFER_REF)
#define ARG_MAY_BE_SENT_BY_REF(zf, arg_num) \
zend_check_arg_send_type(zf, arg_num, ZEND_SEND_PREFER_REF)
/* Quick API to check first 12 arguments */
#define MAX_ARG_FLAG_NUM 12
#ifdef WORDS_BIGENDIAN
# define ZEND_SET_ARG_FLAG(zf, arg_num, mask) do { \
(zf)->quick_arg_flags |= ((mask) << ((arg_num) - 1) * 2); \
} while (0)
# define ZEND_CHECK_ARG_FLAG(zf, arg_num, mask) \
(((zf)->quick_arg_flags >> (((arg_num) - 1) * 2)) & (mask))
#else
# define ZEND_SET_ARG_FLAG(zf, arg_num, mask) do { \
(zf)->quick_arg_flags |= (((mask) << 6) << (arg_num) * 2); \
} while (0)
# define ZEND_CHECK_ARG_FLAG(zf, arg_num, mask) \
(((zf)->quick_arg_flags >> (((arg_num) + 3) * 2)) & (mask))
#endif
#define QUICK_ARG_MUST_BE_SENT_BY_REF(zf, arg_num) \
ZEND_CHECK_ARG_FLAG(zf, arg_num, ZEND_SEND_BY_REF)
#define QUICK_ARG_SHOULD_BE_SENT_BY_REF(zf, arg_num) \
ZEND_CHECK_ARG_FLAG(zf, arg_num, ZEND_SEND_BY_REF|ZEND_SEND_PREFER_REF)
#define QUICK_ARG_MAY_BE_SENT_BY_REF(zf, arg_num) \
ZEND_CHECK_ARG_FLAG(zf, arg_num, ZEND_SEND_PREFER_REF)
#define ZEND_RETURN_VAL 0
#define ZEND_RETURN_REF 1
#define ZEND_BIND_VAL 0
#define ZEND_BIND_REF 1
#define ZEND_BIND_IMPLICIT 2
#define ZEND_RETURNS_FUNCTION (1<<0)
#define ZEND_RETURNS_VALUE (1<<1)
#define ZEND_ARRAY_ELEMENT_REF (1<<0)
#define ZEND_ARRAY_NOT_PACKED (1<<1)
#define ZEND_ARRAY_SIZE_SHIFT 2
/* Attribute for ternary inside parentheses */
#define ZEND_PARENTHESIZED_CONDITIONAL 1
/* For "use" AST nodes and the seen symbol table */
#define ZEND_SYMBOL_CLASS (1<<0)
#define ZEND_SYMBOL_FUNCTION (1<<1)
#define ZEND_SYMBOL_CONST (1<<2)
/* All increment opcodes are even (decrement are odd) */
#define ZEND_IS_INCREMENT(opcode) (((opcode) & 1) == 0)
#define ZEND_IS_BINARY_ASSIGN_OP_OPCODE(opcode) \
(((opcode) >= ZEND_ADD) && ((opcode) <= ZEND_POW))
/* Pseudo-opcodes that are used only temporarily during compilation */
#define ZEND_GOTO 253
#define ZEND_BRK 254
#define ZEND_CONT 255
END_EXTERN_C()
#define ZEND_CLONE_FUNC_NAME "__clone"
#define ZEND_CONSTRUCTOR_FUNC_NAME "__construct"
#define ZEND_DESTRUCTOR_FUNC_NAME "__destruct"
#define ZEND_GET_FUNC_NAME "__get"
#define ZEND_SET_FUNC_NAME "__set"
#define ZEND_UNSET_FUNC_NAME "__unset"
#define ZEND_ISSET_FUNC_NAME "__isset"
#define ZEND_CALL_FUNC_NAME "__call"
#define ZEND_CALLSTATIC_FUNC_NAME "__callstatic"
#define ZEND_TOSTRING_FUNC_NAME "__tostring"
#define ZEND_INVOKE_FUNC_NAME "__invoke"
#define ZEND_DEBUGINFO_FUNC_NAME "__debuginfo"
/* The following constants may be combined in CG(compiler_options)
* to change the default compiler behavior */
/* generate extended debug information */
#define ZEND_COMPILE_EXTENDED_STMT (1<<0)
#define ZEND_COMPILE_EXTENDED_FCALL (1<<1)
#define ZEND_COMPILE_EXTENDED_INFO (ZEND_COMPILE_EXTENDED_STMT|ZEND_COMPILE_EXTENDED_FCALL)
/* call op_array handler of extendions */
#define ZEND_COMPILE_HANDLE_OP_ARRAY (1<<2)
/* generate ZEND_INIT_FCALL_BY_NAME for internal functions instead of ZEND_INIT_FCALL */
#define ZEND_COMPILE_IGNORE_INTERNAL_FUNCTIONS (1<<3)
/* don't perform early binding for classes inherited form internal ones;
* in namespaces assume that internal class that doesn't exist at compile-time
* may apper in run-time */
#define ZEND_COMPILE_IGNORE_INTERNAL_CLASSES (1<<4)
/* generate ZEND_DECLARE_CLASS_DELAYED opcode to delay early binding */
#define ZEND_COMPILE_DELAYED_BINDING (1<<5)
/* disable constant substitution at compile-time */
#define ZEND_COMPILE_NO_CONSTANT_SUBSTITUTION (1<<6)
/* disable substitution of persistent constants at compile-time */
#define ZEND_COMPILE_NO_PERSISTENT_CONSTANT_SUBSTITUTION (1<<8)
/* generate ZEND_INIT_FCALL_BY_NAME for userland functions instead of ZEND_INIT_FCALL */
#define ZEND_COMPILE_IGNORE_USER_FUNCTIONS (1<<9)
/* force ZEND_ACC_USE_GUARDS for all classes */
#define ZEND_COMPILE_GUARDS (1<<10)
/* disable builtin special case function calls */
#define ZEND_COMPILE_NO_BUILTINS (1<<11)
/* result of compilation may be stored in file cache */
#define ZEND_COMPILE_WITH_FILE_CACHE (1<<12)
/* ignore functions and classes declared in other files */
#define ZEND_COMPILE_IGNORE_OTHER_FILES (1<<13)
/* this flag is set when compiler invoked by opcache_compile_file() */
#define ZEND_COMPILE_WITHOUT_EXECUTION (1<<14)
/* this flag is set when compiler invoked during preloading */
#define ZEND_COMPILE_PRELOAD (1<<15)
/* disable jumptable optimization for switch statements */
#define ZEND_COMPILE_NO_JUMPTABLES (1<<16)
/* this flag is set when compiler invoked during preloading in separate process */
#define ZEND_COMPILE_PRELOAD_IN_CHILD (1<<17)
/* The default value for CG(compiler_options) */
#define ZEND_COMPILE_DEFAULT ZEND_COMPILE_HANDLE_OP_ARRAY
/* The default value for CG(compiler_options) during eval() */
#define ZEND_COMPILE_DEFAULT_FOR_EVAL 0
ZEND_API zend_bool zend_binary_op_produces_error(uint32_t opcode, zval *op1, zval *op2);
#endif /* ZEND_COMPILE_H */
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