/* +----------------------------------------------------------------------+ | Zend Engine | +----------------------------------------------------------------------+ | Copyright (c) 1998-2018 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> | +----------------------------------------------------------------------+ */ /* $Id$ */ #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); void init_executor(void); void shutdown_executor(void); void shutdown_destructors(void); ZEND_API void zend_init_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 zend_class_entry *zend_lookup_class(zend_string *name); ZEND_API zend_class_entry *zend_lookup_class_ex(zend_string *name, const zval *key, int use_autoload); 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 int zend_eval_string(char *str, zval *retval_ptr, char *string_name); ZEND_API int zend_eval_stringl(char *str, size_t str_len, zval *retval_ptr, char *string_name); ZEND_API int zend_eval_string_ex(char *str, zval *retval_ptr, char *string_name, int handle_exceptions); ZEND_API int zend_eval_stringl_ex(char *str, size_t str_len, zval *retval_ptr, char *string_name, int handle_exceptions); /* export zend_pass_function to allow comparisons against it */ extern ZEND_API const zend_internal_function zend_pass_function; ZEND_API void ZEND_FASTCALL zend_check_internal_arg_type(zend_function *zf, uint32_t arg_num, zval *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); ZEND_API ZEND_COLD void ZEND_FASTCALL zend_missing_arg_error(zend_execute_data *execute_data); static zend_always_inline zval* zend_assign_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); } do { if (UNEXPECTED(Z_REFCOUNTED_P(variable_ptr))) { zend_refcounted *garbage; if (Z_ISREF_P(variable_ptr)) { variable_ptr = Z_REFVAL_P(variable_ptr); if (EXPECTED(!Z_REFCOUNTED_P(variable_ptr))) { break; } } if (Z_TYPE_P(variable_ptr) == IS_OBJECT && UNEXPECTED(Z_OBJ_HANDLER_P(variable_ptr, set) != NULL)) { Z_OBJ_HANDLER_P(variable_ptr, set)(variable_ptr, value); return variable_ptr; } if (ZEND_CONST_COND(value_type & (IS_VAR|IS_CV), 1) && variable_ptr == value) { if (value_type == IS_VAR && ref) { ZEND_ASSERT(GC_REFCOUNT(ref) > 1); --GC_REFCOUNT(ref); } return variable_ptr; } garbage = Z_COUNTED_P(variable_ptr); if (--GC_REFCOUNT(garbage) == 0) { ZVAL_COPY_VALUE(variable_ptr, value); if (value_type & (IS_CONST|IS_CV)) { if (UNEXPECTED(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_REFCOUNT(ref) == 0)) { efree_size(ref, sizeof(zend_reference)); } else if (Z_OPT_REFCOUNTED_P(variable_ptr)) { Z_ADDREF_P(variable_ptr); } } zval_dtor_func(garbage); return variable_ptr; } else { /* we need to split */ /* optimized version of GC_ZVAL_CHECK_POSSIBLE_ROOT(variable_ptr) */ if ((Z_COLLECTABLE_P(variable_ptr)) && UNEXPECTED(!GC_INFO(garbage))) { gc_possible_root(garbage); } } } } while (0); ZVAL_COPY_VALUE(variable_ptr, value); if (value_type & (IS_CONST|IS_CV)) { if (UNEXPECTED(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_REFCOUNT(ref) == 0)) { efree_size(ref, sizeof(zend_reference)); } else if (Z_OPT_REFCOUNTED_P(variable_ptr)) { Z_ADDREF_P(variable_ptr); } } return variable_ptr; } ZEND_API int zval_update_constant(zval *pp); ZEND_API int 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 operatins 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_destroy(void); ZEND_API void* zend_vm_stack_extend(size_t size); 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, zend_class_entry *called_scope, zend_object *object) { call->func = func; if (object) { Z_OBJ(call->This) = object; ZEND_SET_CALL_INFO(call, 1, call_info); } else { Z_CE(call->This) = called_scope; ZEND_SET_CALL_INFO(call, 0, 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, zend_class_entry *called_scope, zend_object *object) { 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, called_scope, object); return call; } else { EG(vm_stack_top) = (zval*)((char*)call + used_stack); zend_vm_init_call_frame(call, call_info, func, num_args, called_scope, object); 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; if (EXPECTED(ZEND_USER_CODE(func->type))) { used_stack += func->op_array.last_var + func->op_array.T - 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, zend_class_entry *called_scope, zend_object *object) { 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, called_scope, object); } 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)) { zval *end = ZEND_CALL_VAR_NUM(call, call->func->op_array.last_var + call->func->op_array.T); zval *p = end + (ZEND_CALL_NUM_ARGS(call) - call->func->op_array.num_args); do { p--; if (Z_REFCOUNTED_P(p)) { if (!Z_DELREF_P(p)) { zend_refcounted *r = Z_COUNTED_P(p); ZVAL_NULL(p); zval_dtor_func(r); } else { GC_ZVAL_CHECK_POSSIBLE_ROOT(p); } } } while (p != end); } } 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 *end = ZEND_CALL_ARG(call, 1); zval *p = end + num_args; do { p--; if (Z_REFCOUNTED_P(p)) { if (!Z_DELREF_P(p)) { zend_refcounted *r = Z_COUNTED_P(p); ZVAL_NULL(p); zval_dtor_func(r); } } } while (p != end); } } 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); } /* 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 *zend_get_executed_filename(void); ZEND_API zend_string *zend_get_executed_filename_ex(void); ZEND_API uint zend_get_executed_lineno(void); ZEND_API zend_class_entry *zend_get_executed_scope(void); ZEND_API zend_bool zend_is_executing(void); ZEND_API void zend_set_timeout(zend_long seconds, int reset_signals); ZEND_API void zend_unset_timeout(void); ZEND_API ZEND_NORETURN void zend_timeout(int dummy); ZEND_API zend_class_entry *zend_fetch_class(zend_string *class_name, int fetch_type); ZEND_API zend_class_entry *zend_fetch_class_by_name(zend_string *class_name, const zval *key, int fetch_type); void zend_verify_abstract_class(zend_class_entry *ce); ZEND_API void zend_fetch_dimension_by_zval(zval *result, zval *container, zval *dim); ZEND_API void zend_fetch_dimension_by_zval_is(zval *result, zval *container, zval *dim, int dim_type); ZEND_API zval* zend_get_compiled_variable_value(const zend_execute_data *execute_data_ptr, uint32_t var); #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); /* former zend_execute_locks.h */ typedef zval* zend_free_op; 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); ZEND_API void zend_clean_and_cache_symbol_table(zend_array *symbol_table); void zend_free_compiled_variables(zend_execute_data *execute_data); void zend_cleanup_unfinished_execution(zend_execute_data *execute_data, uint32_t op_num, uint32_t catch_op_num); #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 SKIP_EXT_OPLINE(opline) do { \ while (UNEXPECTED((opline)->opcode >= ZEND_EXT_STMT \ && (opline)->opcode <= ZEND_TICKS)) { \ (opline)--; \ } \ } while (0) END_EXTERN_C() #endif /* ZEND_EXECUTE_H */ /* * Local variables: * tab-width: 4 * c-basic-offset: 4 * indent-tabs-mode: t * End: */ SIMPAN PERUBAHAN