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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> |
| Dmitry Stogov <dmitry@php.net> |
+----------------------------------------------------------------------+
*/
#ifndef ZEND_EXECUTE_H
#define ZEND_EXECUTE_H
#include "zend_compile.h"
#include "zend_hash.h"
#include "zend_operators.h"
#include "zend_variables.h"
BEGIN_EXTERN_C()
struct _zend_fcall_info;
ZEND_API extern void (*zend_execute_ex)(zend_execute_data *execute_data);
ZEND_API extern void (*zend_execute_internal)(zend_execute_data *execute_data, zval *return_value);
/* The lc_name may be stack allocated! */
ZEND_API extern zend_class_entry *(*zend_autoload)(zend_string *name, zend_string *lc_name);
void init_executor(void);
void shutdown_executor(void);
void shutdown_destructors(void);
ZEND_API void zend_shutdown_executor_values(bool fast_shutdown);
ZEND_API void zend_init_execute_data(zend_execute_data *execute_data, zend_op_array *op_array, zval *return_value);
ZEND_API void zend_init_func_execute_data(zend_execute_data *execute_data, zend_op_array *op_array, zval *return_value);
ZEND_API void zend_init_code_execute_data(zend_execute_data *execute_data, zend_op_array *op_array, zval *return_value);
ZEND_API void zend_execute(zend_op_array *op_array, zval *return_value);
ZEND_API void execute_ex(zend_execute_data *execute_data);
ZEND_API void execute_internal(zend_execute_data *execute_data, zval *return_value);
ZEND_API bool zend_is_valid_class_name(zend_string *name);
ZEND_API zend_class_entry *zend_lookup_class(zend_string *name);
ZEND_API zend_class_entry *zend_lookup_class_ex(zend_string *name, zend_string *lcname, uint32_t flags);
ZEND_API zend_class_entry *zend_get_called_scope(zend_execute_data *ex);
ZEND_API zend_object *zend_get_this_object(zend_execute_data *ex);
ZEND_API zend_result zend_eval_string(const char *str, zval *retval_ptr, const char *string_name);
ZEND_API zend_result zend_eval_stringl(const char *str, size_t str_len, zval *retval_ptr, const char *string_name);
ZEND_API zend_result zend_eval_string_ex(const char *str, zval *retval_ptr, const char *string_name, bool handle_exceptions);
ZEND_API zend_result zend_eval_stringl_ex(const char *str, size_t str_len, zval *retval_ptr, const char *string_name, bool handle_exceptions);
/* export zend_pass_function to allow comparisons against it */
extern ZEND_API const zend_internal_function zend_pass_function;
ZEND_API ZEND_COLD void ZEND_FASTCALL zend_missing_arg_error(zend_execute_data *execute_data);
ZEND_API ZEND_COLD void ZEND_FASTCALL zend_deprecated_function(const zend_function *fbc);
ZEND_API ZEND_COLD void ZEND_FASTCALL zend_false_to_array_deprecated(void);
ZEND_COLD void ZEND_FASTCALL zend_param_must_be_ref(const zend_function *func, uint32_t arg_num);
ZEND_API ZEND_COLD void ZEND_FASTCALL zend_use_resource_as_offset(const zval *dim);
ZEND_API bool ZEND_FASTCALL zend_verify_ref_assignable_zval(zend_reference *ref, zval *zv, bool strict);
ZEND_API bool ZEND_FASTCALL zend_verify_prop_assignable_by_ref(zend_property_info *prop_info, zval *orig_val, bool strict);
ZEND_API ZEND_COLD void zend_throw_ref_type_error_zval(zend_property_info *prop, zval *zv);
ZEND_API ZEND_COLD void zend_throw_ref_type_error_type(zend_property_info *prop1, zend_property_info *prop2, zval *zv);
ZEND_API ZEND_COLD zval* ZEND_FASTCALL zend_undefined_offset_write(HashTable *ht, zend_long lval);
ZEND_API ZEND_COLD zval* ZEND_FASTCALL zend_undefined_index_write(HashTable *ht, zend_string *offset);
ZEND_API ZEND_COLD void zend_wrong_string_offset_error(void);
ZEND_API ZEND_COLD void ZEND_FASTCALL zend_readonly_property_modification_error(zend_property_info *info);
ZEND_API ZEND_COLD void ZEND_FASTCALL zend_readonly_property_indirect_modification_error(zend_property_info *info);
ZEND_API ZEND_COLD void ZEND_FASTCALL zend_cannot_add_element(void);
ZEND_API bool zend_verify_scalar_type_hint(uint32_t type_mask, zval *arg, bool strict, bool is_internal_arg);
ZEND_API ZEND_COLD void zend_verify_arg_error(
const zend_function *zf, const zend_arg_info *arg_info, uint32_t arg_num, zval *value);
ZEND_API ZEND_COLD void zend_verify_return_error(
const zend_function *zf, zval *value);
ZEND_API ZEND_COLD void zend_verify_never_error(
const zend_function *zf);
ZEND_API bool zend_verify_ref_array_assignable(zend_reference *ref);
ZEND_API bool zend_check_user_type_slow(
zend_type *type, zval *arg, zend_reference *ref, void **cache_slot, bool is_return_type);
#if ZEND_DEBUG
ZEND_API bool zend_internal_call_should_throw(zend_function *fbc, zend_execute_data *call);
ZEND_API ZEND_COLD void zend_internal_call_arginfo_violation(zend_function *fbc);
ZEND_API bool zend_verify_internal_return_type(zend_function *zf, zval *ret);
#endif
#define ZEND_REF_TYPE_SOURCES(ref) \
(ref)->sources
#define ZEND_REF_HAS_TYPE_SOURCES(ref) \
(ZEND_REF_TYPE_SOURCES(ref).ptr != NULL)
#define ZEND_REF_FIRST_SOURCE(ref) \
(ZEND_PROPERTY_INFO_SOURCE_IS_LIST((ref)->sources.list) \
? ZEND_PROPERTY_INFO_SOURCE_TO_LIST((ref)->sources.list)->ptr[0] \
: (ref)->sources.ptr)
ZEND_API void ZEND_FASTCALL zend_ref_add_type_source(zend_property_info_source_list *source_list, zend_property_info *prop);
ZEND_API void ZEND_FASTCALL zend_ref_del_type_source(zend_property_info_source_list *source_list, zend_property_info *prop);
ZEND_API zval* zend_assign_to_typed_ref(zval *variable_ptr, zval *value, zend_uchar value_type, bool strict);
static zend_always_inline void zend_copy_to_variable(zval *variable_ptr, zval *value, zend_uchar value_type)
{
zend_refcounted *ref = NULL;
if (ZEND_CONST_COND(value_type & (IS_VAR|IS_CV), 1) && Z_ISREF_P(value)) {
ref = Z_COUNTED_P(value);
value = Z_REFVAL_P(value);
}
ZVAL_COPY_VALUE(variable_ptr, value);
if (ZEND_CONST_COND(value_type == IS_CONST, 0)) {
if (UNEXPECTED(Z_OPT_REFCOUNTED_P(variable_ptr))) {
Z_ADDREF_P(variable_ptr);
}
} else if (value_type & (IS_CONST|IS_CV)) {
if (Z_OPT_REFCOUNTED_P(variable_ptr)) {
Z_ADDREF_P(variable_ptr);
}
} else if (ZEND_CONST_COND(value_type == IS_VAR, 1) && UNEXPECTED(ref)) {
if (UNEXPECTED(GC_DELREF(ref) == 0)) {
efree_size(ref, sizeof(zend_reference));
} else if (Z_OPT_REFCOUNTED_P(variable_ptr)) {
Z_ADDREF_P(variable_ptr);
}
}
}
static zend_always_inline zval* zend_assign_to_variable(zval *variable_ptr, zval *value, zend_uchar value_type, bool strict)
{
do {
if (UNEXPECTED(Z_REFCOUNTED_P(variable_ptr))) {
zend_refcounted *garbage;
if (Z_ISREF_P(variable_ptr)) {
if (UNEXPECTED(ZEND_REF_HAS_TYPE_SOURCES(Z_REF_P(variable_ptr)))) {
return zend_assign_to_typed_ref(variable_ptr, value, value_type, strict);
}
variable_ptr = Z_REFVAL_P(variable_ptr);
if (EXPECTED(!Z_REFCOUNTED_P(variable_ptr))) {
break;
}
}
garbage = Z_COUNTED_P(variable_ptr);
zend_copy_to_variable(variable_ptr, value, value_type);
if (GC_DELREF(garbage) == 0) {
rc_dtor_func(garbage);
} else { /* we need to split */
/* optimized version of GC_ZVAL_CHECK_POSSIBLE_ROOT(variable_ptr) */
if (UNEXPECTED(GC_MAY_LEAK(garbage))) {
gc_possible_root(garbage);
}
}
return variable_ptr;
}
} while (0);
zend_copy_to_variable(variable_ptr, value, value_type);
return variable_ptr;
}
ZEND_API zend_result ZEND_FASTCALL zval_update_constant(zval *pp);
ZEND_API zend_result ZEND_FASTCALL zval_update_constant_ex(zval *pp, zend_class_entry *scope);
/* dedicated Zend executor functions - do not use! */
struct _zend_vm_stack {
zval *top;
zval *end;
zend_vm_stack prev;
};
#define ZEND_VM_STACK_HEADER_SLOTS \
((ZEND_MM_ALIGNED_SIZE(sizeof(struct _zend_vm_stack)) + ZEND_MM_ALIGNED_SIZE(sizeof(zval)) - 1) / ZEND_MM_ALIGNED_SIZE(sizeof(zval)))
#define ZEND_VM_STACK_ELEMENTS(stack) \
(((zval*)(stack)) + ZEND_VM_STACK_HEADER_SLOTS)
/*
* In general in RELEASE build ZEND_ASSERT() must be zero-cost, but for some
* reason, GCC generated worse code, performing CSE on assertion code and the
* following "slow path" and moving memory read operations from slow path into
* common header. This made a degradation for the fast path.
* The following "#if ZEND_DEBUG" eliminates it.
*/
#if ZEND_DEBUG
# define ZEND_ASSERT_VM_STACK(stack) ZEND_ASSERT(stack->top > (zval *) stack && stack->end > (zval *) stack && stack->top <= stack->end)
# define ZEND_ASSERT_VM_STACK_GLOBAL ZEND_ASSERT(EG(vm_stack_top) > (zval *) EG(vm_stack) && EG(vm_stack_end) > (zval *) EG(vm_stack) && EG(vm_stack_top) <= EG(vm_stack_end))
#else
# define ZEND_ASSERT_VM_STACK(stack)
# define ZEND_ASSERT_VM_STACK_GLOBAL
#endif
ZEND_API void zend_vm_stack_init(void);
ZEND_API void zend_vm_stack_init_ex(size_t page_size);
ZEND_API void zend_vm_stack_destroy(void);
ZEND_API void* zend_vm_stack_extend(size_t size);
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;
}
static zend_always_inline void zend_vm_init_call_frame(zend_execute_data *call, uint32_t call_info, zend_function *func, uint32_t num_args, void *object_or_called_scope)
{
ZEND_ASSERT(!func->common.scope || object_or_called_scope);
call->func = func;
Z_PTR(call->This) = object_or_called_scope;
ZEND_CALL_INFO(call) = call_info;
ZEND_CALL_NUM_ARGS(call) = num_args;
}
static zend_always_inline zend_execute_data *zend_vm_stack_push_call_frame_ex(uint32_t used_stack, uint32_t call_info, zend_function *func, uint32_t num_args, void *object_or_called_scope)
{
zend_execute_data *call = (zend_execute_data*)EG(vm_stack_top);
ZEND_ASSERT_VM_STACK_GLOBAL;
if (UNEXPECTED(used_stack > (size_t)(((char*)EG(vm_stack_end)) - (char*)call))) {
call = (zend_execute_data*)zend_vm_stack_extend(used_stack);
ZEND_ASSERT_VM_STACK_GLOBAL;
zend_vm_init_call_frame(call, call_info | ZEND_CALL_ALLOCATED, func, num_args, object_or_called_scope);
return call;
} else {
EG(vm_stack_top) = (zval*)((char*)call + used_stack);
zend_vm_init_call_frame(call, call_info, func, num_args, object_or_called_scope);
return call;
}
}
static zend_always_inline uint32_t zend_vm_calc_used_stack(uint32_t num_args, zend_function *func)
{
uint32_t used_stack = ZEND_CALL_FRAME_SLOT + num_args + func->common.T;
if (EXPECTED(ZEND_USER_CODE(func->type))) {
used_stack += func->op_array.last_var - MIN(func->op_array.num_args, num_args);
}
return used_stack * sizeof(zval);
}
static zend_always_inline zend_execute_data *zend_vm_stack_push_call_frame(uint32_t call_info, zend_function *func, uint32_t num_args, void *object_or_called_scope)
{
uint32_t used_stack = zend_vm_calc_used_stack(num_args, func);
return zend_vm_stack_push_call_frame_ex(used_stack, call_info,
func, num_args, object_or_called_scope);
}
static zend_always_inline void zend_vm_stack_free_extra_args_ex(uint32_t call_info, zend_execute_data *call)
{
if (UNEXPECTED(call_info & ZEND_CALL_FREE_EXTRA_ARGS)) {
uint32_t count = ZEND_CALL_NUM_ARGS(call) - call->func->op_array.num_args;
zval *p = ZEND_CALL_VAR_NUM(call, call->func->op_array.last_var + call->func->op_array.T);
do {
i_zval_ptr_dtor(p);
p++;
} while (--count);
}
}
static zend_always_inline void zend_vm_stack_free_extra_args(zend_execute_data *call)
{
zend_vm_stack_free_extra_args_ex(ZEND_CALL_INFO(call), call);
}
static zend_always_inline void zend_vm_stack_free_args(zend_execute_data *call)
{
uint32_t num_args = ZEND_CALL_NUM_ARGS(call);
if (EXPECTED(num_args > 0)) {
zval *p = ZEND_CALL_ARG(call, 1);
do {
zval_ptr_dtor_nogc(p);
p++;
} while (--num_args);
}
}
static zend_always_inline void zend_vm_stack_free_call_frame_ex(uint32_t call_info, zend_execute_data *call)
{
ZEND_ASSERT_VM_STACK_GLOBAL;
if (UNEXPECTED(call_info & ZEND_CALL_ALLOCATED)) {
zend_vm_stack p = EG(vm_stack);
zend_vm_stack prev = p->prev;
ZEND_ASSERT(call == (zend_execute_data*)ZEND_VM_STACK_ELEMENTS(EG(vm_stack)));
EG(vm_stack_top) = prev->top;
EG(vm_stack_end) = prev->end;
EG(vm_stack) = prev;
efree(p);
} else {
EG(vm_stack_top) = (zval*)call;
}
ZEND_ASSERT_VM_STACK_GLOBAL;
}
static zend_always_inline void zend_vm_stack_free_call_frame(zend_execute_data *call)
{
zend_vm_stack_free_call_frame_ex(ZEND_CALL_INFO(call), call);
}
zend_execute_data *zend_vm_stack_copy_call_frame(
zend_execute_data *call, uint32_t passed_args, uint32_t additional_args);
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);
}
}
ZEND_API void ZEND_FASTCALL zend_free_extra_named_params(zend_array *extra_named_params);
/* services */
ZEND_API const char *get_active_class_name(const char **space);
ZEND_API const char *get_active_function_name(void);
ZEND_API const char *get_active_function_arg_name(uint32_t arg_num);
ZEND_API const char *get_function_arg_name(const zend_function *func, uint32_t arg_num);
ZEND_API zend_string *get_active_function_or_method_name(void);
ZEND_API zend_string *get_function_or_method_name(const zend_function *func);
ZEND_API const char *zend_get_executed_filename(void);
ZEND_API zend_string *zend_get_executed_filename_ex(void);
ZEND_API uint32_t zend_get_executed_lineno(void);
ZEND_API zend_class_entry *zend_get_executed_scope(void);
ZEND_API bool zend_is_executing(void);
ZEND_API ZEND_COLD void ZEND_FASTCALL zend_cannot_pass_by_reference(uint32_t arg_num);
ZEND_API void zend_set_timeout(zend_long seconds, bool reset_signals);
ZEND_API void zend_unset_timeout(void);
ZEND_API ZEND_NORETURN void ZEND_FASTCALL zend_timeout(void);
ZEND_API zend_class_entry *zend_fetch_class(zend_string *class_name, uint32_t fetch_type);
ZEND_API zend_class_entry *zend_fetch_class_with_scope(zend_string *class_name, uint32_t fetch_type, zend_class_entry *scope);
ZEND_API zend_class_entry *zend_fetch_class_by_name(zend_string *class_name, zend_string *lcname, uint32_t fetch_type);
ZEND_API zend_function * ZEND_FASTCALL zend_fetch_function(zend_string *name);
ZEND_API zend_function * ZEND_FASTCALL zend_fetch_function_str(const char *name, size_t len);
ZEND_API void ZEND_FASTCALL zend_init_func_run_time_cache(zend_op_array *op_array);
ZEND_API void zend_fetch_dimension_const(zval *result, zval *container, zval *dim, int type);
ZEND_API zval* zend_get_compiled_variable_value(const zend_execute_data *execute_data_ptr, uint32_t var);
ZEND_API bool zend_gcc_global_regs(void);
#define ZEND_USER_OPCODE_CONTINUE 0 /* execute next opcode */
#define ZEND_USER_OPCODE_RETURN 1 /* exit from executor (return from function) */
#define ZEND_USER_OPCODE_DISPATCH 2 /* call original opcode handler */
#define ZEND_USER_OPCODE_ENTER 3 /* enter into new op_array without recursion */
#define ZEND_USER_OPCODE_LEAVE 4 /* return to calling op_array within the same executor */
#define ZEND_USER_OPCODE_DISPATCH_TO 0x100 /* call original handler of returned opcode */
ZEND_API int zend_set_user_opcode_handler(zend_uchar opcode, user_opcode_handler_t handler);
ZEND_API user_opcode_handler_t zend_get_user_opcode_handler(zend_uchar opcode);
ZEND_API zval *zend_get_zval_ptr(const zend_op *opline, int op_type, const znode_op *node, const zend_execute_data *execute_data);
ZEND_API void zend_clean_and_cache_symbol_table(zend_array *symbol_table);
ZEND_API void ZEND_FASTCALL zend_free_compiled_variables(zend_execute_data *execute_data);
ZEND_API void zend_unfinished_calls_gc(zend_execute_data *execute_data, zend_execute_data *call, uint32_t op_num, zend_get_gc_buffer *buf);
ZEND_API void zend_cleanup_unfinished_execution(zend_execute_data *execute_data, uint32_t op_num, uint32_t catch_op_num);
ZEND_API ZEND_ATTRIBUTE_DEPRECATED HashTable *zend_unfinished_execution_gc(zend_execute_data *execute_data, zend_execute_data *call, zend_get_gc_buffer *gc_buffer);
ZEND_API HashTable *zend_unfinished_execution_gc_ex(zend_execute_data *execute_data, zend_execute_data *call, zend_get_gc_buffer *gc_buffer, bool suspended_by_yield);
zval * ZEND_FASTCALL zend_handle_named_arg(
zend_execute_data **call_ptr, zend_string *arg_name,
uint32_t *arg_num_ptr, void **cache_slot);
ZEND_API int ZEND_FASTCALL zend_handle_undef_args(zend_execute_data *call);
#define CACHE_ADDR(num) \
((void**)((char*)EX(run_time_cache) + (num)))
#define CACHED_PTR(num) \
((void**)((char*)EX(run_time_cache) + (num)))[0]
#define CACHE_PTR(num, ptr) do { \
((void**)((char*)EX(run_time_cache) + (num)))[0] = (ptr); \
} while (0)
#define CACHED_POLYMORPHIC_PTR(num, ce) \
(EXPECTED(((void**)((char*)EX(run_time_cache) + (num)))[0] == (void*)(ce)) ? \
((void**)((char*)EX(run_time_cache) + (num)))[1] : \
NULL)
#define CACHE_POLYMORPHIC_PTR(num, ce, ptr) do { \
void **slot = (void**)((char*)EX(run_time_cache) + (num)); \
slot[0] = (ce); \
slot[1] = (ptr); \
} while (0)
#define CACHED_PTR_EX(slot) \
(slot)[0]
#define CACHE_PTR_EX(slot, ptr) do { \
(slot)[0] = (ptr); \
} while (0)
#define CACHED_POLYMORPHIC_PTR_EX(slot, ce) \
(EXPECTED((slot)[0] == (ce)) ? (slot)[1] : NULL)
#define CACHE_POLYMORPHIC_PTR_EX(slot, ce, ptr) do { \
(slot)[0] = (ce); \
(slot)[1] = (ptr); \
} while (0)
#define CACHE_SPECIAL (1<<0)
#define IS_SPECIAL_CACHE_VAL(ptr) \
(((uintptr_t)(ptr)) & CACHE_SPECIAL)
#define ENCODE_SPECIAL_CACHE_NUM(num) \
((void*)((((uintptr_t)(num)) << 1) | CACHE_SPECIAL))
#define DECODE_SPECIAL_CACHE_NUM(ptr) \
(((uintptr_t)(ptr)) >> 1)
#define ENCODE_SPECIAL_CACHE_PTR(ptr) \
((void*)(((uintptr_t)(ptr)) | CACHE_SPECIAL))
#define DECODE_SPECIAL_CACHE_PTR(ptr) \
((void*)(((uintptr_t)(ptr)) & ~CACHE_SPECIAL))
#define SKIP_EXT_OPLINE(opline) do { \
while (UNEXPECTED((opline)->opcode >= ZEND_EXT_STMT \
&& (opline)->opcode <= ZEND_TICKS)) { \
(opline)--; \
} \
} while (0)
#define ZEND_CLASS_HAS_TYPE_HINTS(ce) ((ce->ce_flags & ZEND_ACC_HAS_TYPE_HINTS) == ZEND_ACC_HAS_TYPE_HINTS)
ZEND_API bool zend_verify_property_type(zend_property_info *info, zval *property, bool strict);
ZEND_COLD void zend_verify_property_type_error(zend_property_info *info, zval *property);
#define ZEND_REF_ADD_TYPE_SOURCE(ref, source) \
zend_ref_add_type_source(&ZEND_REF_TYPE_SOURCES(ref), source)
#define ZEND_REF_DEL_TYPE_SOURCE(ref, source) \
zend_ref_del_type_source(&ZEND_REF_TYPE_SOURCES(ref), source)
#define ZEND_REF_FOREACH_TYPE_SOURCES(ref, prop) do { \
zend_property_info_source_list *_source_list = &ZEND_REF_TYPE_SOURCES(ref); \
zend_property_info **_prop, **_end; \
zend_property_info_list *_list; \
if (_source_list->ptr) { \
if (ZEND_PROPERTY_INFO_SOURCE_IS_LIST(_source_list->list)) { \
_list = ZEND_PROPERTY_INFO_SOURCE_TO_LIST(_source_list->list); \
_prop = _list->ptr; \
_end = _list->ptr + _list->num; \
} else { \
_prop = &_source_list->ptr; \
_end = _prop + 1; \
} \
for (; _prop < _end; _prop++) { \
prop = *_prop; \
#define ZEND_REF_FOREACH_TYPE_SOURCES_END() \
} \
} \
} while (0)
ZEND_COLD void zend_match_unhandled_error(zval *value);
END_EXTERN_C()
#endif /* ZEND_EXECUTE_H */
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