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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 */