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php-src/Zend/zend_execute.h

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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2014 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> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#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 TSRMLS_DC);
ZEND_API extern void (*zend_execute_internal)(zend_execute_data *execute_data, zval *return_value TSRMLS_DC);
void init_executor(TSRMLS_D);
void shutdown_executor(TSRMLS_D);
void shutdown_destructors(TSRMLS_D);
ZEND_API void zend_init_execute_data(zend_execute_data *execute_data, zend_op_array *op_array, zval *return_value TSRMLS_DC);
ZEND_API zend_execute_data *zend_create_generator_execute_data(zend_execute_data *call, zend_op_array *op_array, zval *return_value TSRMLS_DC);
ZEND_API void zend_execute(zend_op_array *op_array, zval *return_value TSRMLS_DC);
ZEND_API void execute_ex(zend_execute_data *execute_data TSRMLS_DC);
ZEND_API void execute_internal(zend_execute_data *execute_data, zval *return_value TSRMLS_DC);
ZEND_API int zend_is_true(zval *op TSRMLS_DC);
ZEND_API zend_class_entry *zend_lookup_class(zend_string *name TSRMLS_DC);
ZEND_API zend_class_entry *zend_lookup_class_ex(zend_string *name, const zval *key, int use_autoload TSRMLS_DC);
ZEND_API int zend_eval_string(char *str, zval *retval_ptr, char *string_name TSRMLS_DC);
ZEND_API int zend_eval_stringl(char *str, size_t str_len, zval *retval_ptr, char *string_name TSRMLS_DC);
ZEND_API int zend_eval_string_ex(char *str, zval *retval_ptr, char *string_name, int handle_exceptions TSRMLS_DC);
ZEND_API int zend_eval_stringl_ex(char *str, size_t str_len, zval *retval_ptr, char *string_name, int handle_exceptions TSRMLS_DC);
ZEND_API char * zend_verify_internal_arg_class_kind(const zend_internal_arg_info *cur_arg_info, char **class_name, zend_class_entry **pce TSRMLS_DC);
ZEND_API char * zend_verify_arg_class_kind(const zend_arg_info *cur_arg_info, char **class_name, zend_class_entry **pce TSRMLS_DC);
ZEND_API void zend_verify_arg_error(int error_type, 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 TSRMLS_DC);
static zend_always_inline int i_zend_is_true(zval *op TSRMLS_DC)
{
int result;
again:
switch (Z_TYPE_P(op)) {
case IS_UNDEF:
case IS_NULL:
case IS_FALSE:
result = 0;
break;
case IS_TRUE:
result = 1;
break;
case IS_LONG:
result = (Z_LVAL_P(op)?1:0);
break;
case IS_RESOURCE:
result = (Z_RES_HANDLE_P(op)?1:0);
break;
case IS_DOUBLE:
result = (Z_DVAL_P(op) ? 1 : 0);
break;
case IS_STRING:
if (Z_STRLEN_P(op) == 0
|| (Z_STRLEN_P(op)==1 && Z_STRVAL_P(op)[0]=='0')) {
result = 0;
} else {
result = 1;
}
break;
case IS_ARRAY:
result = (zend_hash_num_elements(Z_ARRVAL_P(op))?1:0);
break;
case IS_OBJECT:
if (Z_OBJ_HT_P(op)->cast_object) {
zval tmp;
if (Z_OBJ_HT_P(op)->cast_object(op, &tmp, _IS_BOOL TSRMLS_CC) == SUCCESS) {
result = Z_TYPE(tmp) == IS_TRUE;
break;
}
zend_error(E_RECOVERABLE_ERROR, "Object of class %s could not be converted to boolean", Z_OBJ_P(op)->ce->name->val);
} else if (Z_OBJ_HT_P(op)->get) {
zval rv;
zval *tmp = Z_OBJ_HT_P(op)->get(op, &rv TSRMLS_CC);
if (Z_TYPE_P(tmp) != IS_OBJECT) {
/* for safety - avoid loop */
convert_to_boolean(tmp);
result = Z_TYPE_P(tmp) == IS_TRUE;
zval_ptr_dtor(tmp);
break;
}
}
result = 1;
break;
case IS_REFERENCE:
op = Z_REFVAL_P(op);
goto again;
break;
default:
result = 0;
break;
}
return result;
}
static zend_always_inline zval* zend_assign_to_variable(zval *variable_ptr, zval *value, zend_uchar value_type TSRMLS_DC)
{
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 TSRMLS_CC);
return variable_ptr;
}
if ((value_type & (IS_VAR|IS_CV)) && variable_ptr == value) {
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_CONST can't be IS_OBJECT, IS_RESOURCE or IS_REFERENCE */
if (UNEXPECTED(Z_OPT_COPYABLE_P(variable_ptr))) {
zval_copy_ctor_func(variable_ptr);
}
} else if (value_type != IS_TMP_VAR) {
if (UNEXPECTED(Z_OPT_REFCOUNTED_P(variable_ptr))) {
Z_ADDREF_P(variable_ptr);
}
}
_zval_dtor_func_for_ptr(garbage ZEND_FILE_LINE_CC);
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 TSRMLS_CC);
}
}
}
} while (0);
ZVAL_COPY_VALUE(variable_ptr, value);
if (value_type == IS_CONST) {
/* IS_CONST can't be IS_OBJECT, IS_RESOURCE or IS_REFERENCE */
if (UNEXPECTED(Z_OPT_COPYABLE_P(variable_ptr))) {
zval_copy_ctor_func(variable_ptr);
}
} else if (value_type != IS_TMP_VAR) {
if (UNEXPECTED(Z_OPT_REFCOUNTED_P(variable_ptr))) {
Z_ADDREF_P(variable_ptr);
}
}
return variable_ptr;
}
ZEND_API int zval_update_constant(zval *pp, zend_bool inline_change TSRMLS_DC);
ZEND_API int zval_update_constant_inline_change(zval *pp, zend_class_entry *scope TSRMLS_DC);
ZEND_API int zval_update_constant_no_inline_change(zval *pp, zend_class_entry *scope TSRMLS_DC);
ZEND_API int zval_update_constant_ex(zval *pp, zend_bool inline_change, zend_class_entry *scope TSRMLS_DC);
/* 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_ELEMETS(stack) \
(((zval*)(stack)) + ZEND_VM_STACK_HEADER_SLOTS)
ZEND_API void zend_vm_stack_init(TSRMLS_D);
ZEND_API void zend_vm_stack_destroy(TSRMLS_D);
ZEND_API void* zend_vm_stack_extend(size_t size TSRMLS_DC);
static zend_always_inline zval* zend_vm_stack_alloc(size_t size TSRMLS_DC)
{
char *top = (char*)EG(vm_stack_top);
if (UNEXPECTED(size > (size_t)(((char*)EG(vm_stack_end)) - top))) {
return (zval*)zend_vm_stack_extend(size TSRMLS_CC);
}
EG(vm_stack_top) = (zval*)(top + size);
return (zval*)top;
}
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, zend_execute_data *prev TSRMLS_DC)
{
uint32_t used_stack = ZEND_CALL_FRAME_SLOT + num_args;
zend_execute_data *call;
if (ZEND_USER_CODE(func->type)) {
used_stack += func->op_array.last_var + func->op_array.T - MIN(func->op_array.num_args, num_args);
}
call = (zend_execute_data*)zend_vm_stack_alloc(used_stack * sizeof(zval) TSRMLS_CC);
call->func = func;
Z_OBJ(call->This) = object;
ZEND_SET_CALL_INFO(call, call_info);
ZEND_CALL_NUM_ARGS(call) = 0;
call->called_scope = called_scope;
call->prev_execute_data = prev;
return call;
}
static zend_always_inline void zend_vm_stack_free_extra_args(zend_execute_data *call TSRMLS_DC)
{
uint32_t first_extra_arg = call->func->op_array.num_args - ((call->func->common.fn_flags & ZEND_ACC_VARIADIC) != 0);
if (UNEXPECTED(ZEND_CALL_NUM_ARGS(call) > first_extra_arg)) {
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) - first_extra_arg);
do {
p--;
zval_ptr_dtor_nogc(p);
} while (p != end);
}
}
static zend_always_inline void zend_vm_stack_free_args(zend_execute_data *call TSRMLS_DC)
{
uint32_t num_args = ZEND_CALL_NUM_ARGS(call);
if (num_args > 0) {
zval *end = ZEND_CALL_ARG(call, 1);
zval *p = end + num_args;
do {
p--;
zval_ptr_dtor_nogc(p);
} while (p != end);
}
}
static zend_always_inline void zend_vm_stack_free_call_frame(zend_execute_data *call TSRMLS_DC)
{
zend_vm_stack p = EG(vm_stack);
if (UNEXPECTED(ZEND_VM_STACK_ELEMETS(p) == (zval*)call)) {
zend_vm_stack prev = p->prev;
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;
}
}
/* services */
ZEND_API const char *get_active_class_name(const char **space TSRMLS_DC);
ZEND_API const char *get_active_function_name(TSRMLS_D);
ZEND_API const char *zend_get_executed_filename(TSRMLS_D);
ZEND_API uint zend_get_executed_lineno(TSRMLS_D);
ZEND_API zend_bool zend_is_executing(TSRMLS_D);
ZEND_API void zend_set_timeout(zend_long seconds, int reset_signals);
ZEND_API void zend_unset_timeout(TSRMLS_D);
ZEND_API void zend_timeout(int dummy);
ZEND_API zend_class_entry *zend_fetch_class(zend_string *class_name, int fetch_type TSRMLS_DC);
ZEND_API zend_class_entry *zend_fetch_class_by_name(zend_string *class_name, const zval *key, int fetch_type TSRMLS_DC);
void zend_verify_abstract_class(zend_class_entry *ce TSRMLS_DC);
ZEND_API void zend_fetch_dimension_by_zval(zval *result, zval *container, zval *dim TSRMLS_DC);
#ifdef ZEND_WIN32
void zend_init_timeout_thread(void);
void zend_shutdown_timeout_thread(void);
#define WM_REGISTER_ZEND_TIMEOUT (WM_USER+1)
#define WM_UNREGISTER_ZEND_TIMEOUT (WM_USER+2)
#endif
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 TSRMLS_DC);
ZEND_API int zend_do_fcall(ZEND_OPCODE_HANDLER_ARGS);
ZEND_API void zend_clean_and_cache_symbol_table(zend_array *symbol_table TSRMLS_DC);
void zend_free_compiled_variables(zend_execute_data *execute_data TSRMLS_DC);
#define CACHED_PTR(num) \
EX(run_time_cache)[(num)]
#define CACHE_PTR(num, ptr) do { \
EX(run_time_cache)[(num)] = (ptr); \
} while (0)
#define CACHED_POLYMORPHIC_PTR(num, ce) \
((EX(run_time_cache)[(num)] == (ce)) ? \
EX(run_time_cache)[(num) + 1] : \
NULL)
#define CACHE_POLYMORPHIC_PTR(num, ce, ptr) do { \
EX(run_time_cache)[(num)] = (ce); \
EX(run_time_cache)[(num) + 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) \
(((slot)[0] == (ce)) ? (slot)[1] : NULL)
#define CACHE_POLYMORPHIC_PTR_EX(slot, ce, ptr) do { \
(slot)[0] = (ce); \
(slot)[1] = (ptr); \
} while (0)
END_EXTERN_C()
#endif /* ZEND_EXECUTE_H */
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
*/
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