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php-src/Zend/zend_execute.h
Xinchen Hui a666285bc2 Happy New Year
2013-01-01 16:37:09 +08:00

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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2013 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"
typedef union _temp_variable {
zval tmp_var;
struct {
zval **ptr_ptr;
zval *ptr;
zend_bool fcall_returned_reference;
} var;
struct {
zval **ptr_ptr; /* shared with var.ptr_ptr */
zval *str;
zend_uint offset;
} str_offset;
struct {
zval **ptr_ptr; /* shared with var.ptr_ptr */
zval *ptr; /* shared with var.ptr */
HashPointer fe_pos;
} fe;
zend_class_entry *class_entry;
} temp_variable;
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_ptr, struct _zend_fcall_info *fci, int return_value_used TSRMLS_DC);
void init_executor(TSRMLS_D);
void shutdown_executor(TSRMLS_D);
void shutdown_destructors(TSRMLS_D);
zend_execute_data *zend_create_execute_data_from_op_array(zend_op_array *op_array, zend_bool nested TSRMLS_DC);
ZEND_API void zend_execute(zend_op_array *op_array TSRMLS_DC);
ZEND_API void execute_ex(zend_execute_data *execute_data TSRMLS_DC);
ZEND_API void execute_internal(zend_execute_data *execute_data_ptr, struct _zend_fcall_info *fci, int return_value_used TSRMLS_DC);
ZEND_API int zend_is_true(zval *op);
ZEND_API int zend_lookup_class(const char *name, int name_length, zend_class_entry ***ce TSRMLS_DC);
ZEND_API int zend_lookup_class_ex(const char *name, int name_length, const zend_literal *key, int use_autoload, zend_class_entry ***ce 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, int 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, int str_len, zval *retval_ptr, char *string_name, int handle_exceptions TSRMLS_DC);
ZEND_API char * zend_verify_arg_class_kind(const zend_arg_info *cur_arg_info, ulong fetch_type, const char **class_name, zend_class_entry **pce TSRMLS_DC);
ZEND_API int zend_verify_arg_error(int error_type, const zend_function *zf, zend_uint arg_num, const char *need_msg, const char *need_kind, const char *given_msg, const char *given_kind TSRMLS_DC);
static zend_always_inline void i_zval_ptr_dtor(zval *zval_ptr ZEND_FILE_LINE_DC)
{
if (!Z_DELREF_P(zval_ptr)) {
TSRMLS_FETCH();
ZEND_ASSERT(zval_ptr != &EG(uninitialized_zval));
GC_REMOVE_ZVAL_FROM_BUFFER(zval_ptr);
zval_dtor(zval_ptr);
efree_rel(zval_ptr);
} else {
TSRMLS_FETCH();
if (Z_REFCOUNT_P(zval_ptr) == 1) {
Z_UNSET_ISREF_P(zval_ptr);
}
GC_ZVAL_CHECK_POSSIBLE_ROOT(zval_ptr);
}
}
static zend_always_inline int i_zend_is_true(zval *op)
{
int result;
switch (Z_TYPE_P(op)) {
case IS_NULL:
result = 0;
break;
case IS_LONG:
case IS_BOOL:
case IS_RESOURCE:
result = (Z_LVAL_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(IS_ZEND_STD_OBJECT(*op)) {
TSRMLS_FETCH();
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_LVAL(tmp);
break;
}
} else if (Z_OBJ_HT_P(op)->get) {
zval *tmp = Z_OBJ_HT_P(op)->get(op TSRMLS_CC);
if(Z_TYPE_P(tmp) != IS_OBJECT) {
/* for safety - avoid loop */
convert_to_boolean(tmp);
result = Z_LVAL_P(tmp);
zval_ptr_dtor(&tmp);
break;
}
}
}
result = 1;
break;
default:
result = 0;
break;
}
return result;
}
ZEND_API int zval_update_constant(zval **pp, void *arg TSRMLS_DC);
ZEND_API int zval_update_constant_inline_change(zval **pp, void *arg TSRMLS_DC);
ZEND_API int zval_update_constant_no_inline_change(zval **pp, void *arg TSRMLS_DC);
ZEND_API int zval_update_constant_ex(zval **pp, void *arg, zend_class_entry *scope TSRMLS_DC);
/* dedicated Zend executor functions - do not use! */
#define ZEND_VM_STACK_PAGE_SIZE ((16 * 1024) - 16)
struct _zend_vm_stack {
void **top;
void **end;
zend_vm_stack prev;
};
#define ZEND_VM_STACK_ELEMETS(stack) \
((void**)(((char*)(stack)) + ZEND_MM_ALIGNED_SIZE(sizeof(struct _zend_vm_stack))))
#define ZEND_VM_STACK_GROW_IF_NEEDED(count) \
do { \
if (UNEXPECTED((count) > \
EG(argument_stack)->end - EG(argument_stack)->top)) { \
zend_vm_stack_extend((count) TSRMLS_CC); \
} \
} while (0)
static zend_always_inline zend_vm_stack zend_vm_stack_new_page(int count) {
zend_vm_stack page = (zend_vm_stack)emalloc(ZEND_MM_ALIGNED_SIZE(sizeof(*page)) + sizeof(void*) * count);
page->top = ZEND_VM_STACK_ELEMETS(page);
page->end = page->top + count;
page->prev = NULL;
return page;
}
static zend_always_inline void zend_vm_stack_init(TSRMLS_D)
{
EG(argument_stack) = zend_vm_stack_new_page(ZEND_VM_STACK_PAGE_SIZE);
}
static zend_always_inline void zend_vm_stack_destroy(TSRMLS_D)
{
zend_vm_stack stack = EG(argument_stack);
while (stack != NULL) {
zend_vm_stack p = stack->prev;
efree(stack);
stack = p;
}
}
static zend_always_inline void zend_vm_stack_extend(int count TSRMLS_DC)
{
zend_vm_stack p = zend_vm_stack_new_page(count >= ZEND_VM_STACK_PAGE_SIZE ? count : ZEND_VM_STACK_PAGE_SIZE);
p->prev = EG(argument_stack);
EG(argument_stack) = p;
}
static zend_always_inline void **zend_vm_stack_top(TSRMLS_D)
{
return EG(argument_stack)->top;
}
static zend_always_inline void zend_vm_stack_push(void *ptr TSRMLS_DC)
{
*(EG(argument_stack)->top++) = ptr;
}
static zend_always_inline void *zend_vm_stack_pop(TSRMLS_D)
{
void *el = *(--EG(argument_stack)->top);
return el;
}
static zend_always_inline void *zend_vm_stack_alloc(size_t size TSRMLS_DC)
{
void *ret;
size = (size + (sizeof(void*) - 1)) / sizeof(void*);
/* the following comparison must be optimized out at compile time */
if (ZEND_MM_ALIGNMENT > sizeof(void*)) {
int extra = (ZEND_MM_ALIGNMENT - ((zend_uintptr_t)EG(argument_stack)->top & (ZEND_MM_ALIGNMENT - 1))) / sizeof(void*);
if (UNEXPECTED(size + extra + ZEND_MM_ALIGNED_SIZE(sizeof(void*)) / sizeof(void*) >
(zend_uintptr_t)(EG(argument_stack)->end - EG(argument_stack)->top))) {
zend_vm_stack_extend(size TSRMLS_CC);
} else {
void **old_top = EG(argument_stack)->top;
EG(argument_stack)->top += extra;
/* store old top on the stack */
*EG(argument_stack)->top = (void*)old_top;
EG(argument_stack)->top += ZEND_MM_ALIGNED_SIZE(sizeof(void*)) / sizeof(void*);
}
} else {
ZEND_VM_STACK_GROW_IF_NEEDED((int)size);
}
ret = (void*)EG(argument_stack)->top;
EG(argument_stack)->top += size;
return ret;
}
static zend_always_inline void** zend_vm_stack_frame_base(zend_execute_data *ex)
{
return (void**)((char*)ex->call_slots +
ZEND_MM_ALIGNED_SIZE(sizeof(call_slot)) * ex->op_array->nested_calls);
}
static zend_always_inline void zend_vm_stack_free_int(void *ptr TSRMLS_DC)
{
if (UNEXPECTED(ZEND_VM_STACK_ELEMETS(EG(argument_stack)) == (void**)ptr)) {
zend_vm_stack p = EG(argument_stack);
EG(argument_stack) = p->prev;
efree(p);
} else {
EG(argument_stack)->top = (void**)ptr;
}
}
static zend_always_inline void zend_vm_stack_free(void *ptr TSRMLS_DC)
{
if (UNEXPECTED(ZEND_VM_STACK_ELEMETS(EG(argument_stack)) == (void**)ptr)) {
zend_vm_stack p = EG(argument_stack);
EG(argument_stack) = p->prev;
efree(p);
} else {
/* the following comparison must be optimized out at compile time */
if (ZEND_MM_ALIGNMENT > sizeof(void*)) {
ptr = (void*)(((char*)ptr) - ZEND_MM_ALIGNED_SIZE(sizeof(void*)));
EG(argument_stack)->top = *(void***)ptr;
} else {
EG(argument_stack)->top = (void**)ptr;
}
}
}
static zend_always_inline void zend_vm_stack_clear_multiple(int nested TSRMLS_DC)
{
void **p = EG(argument_stack)->top - 1;
void **end = p - (int)(zend_uintptr_t)*p;
while (p != end) {
zval *q = *(zval **)(--p);
*p = NULL;
i_zval_ptr_dtor(q ZEND_FILE_LINE_CC);
}
if (nested) {
EG(argument_stack)->top = p;
} else {
zend_vm_stack_free_int(p TSRMLS_CC);
}
}
static zend_always_inline int zend_vm_stack_get_args_count_ex(zend_execute_data *ex)
{
if (ex) {
void **p = ex->function_state.arguments;
return (int)(zend_uintptr_t) *p;
} else {
return 0;
}
}
static zend_always_inline zval** zend_vm_stack_get_arg_ex(zend_execute_data *ex, int requested_arg)
{
void **p = ex->function_state.arguments;
int arg_count = (int)(zend_uintptr_t) *p;
if (UNEXPECTED(requested_arg > arg_count)) {
return NULL;
}
return (zval**)p - arg_count + requested_arg - 1;
}
static zend_always_inline int zend_vm_stack_get_args_count(TSRMLS_D)
{
return zend_vm_stack_get_args_count_ex(EG(current_execute_data)->prev_execute_data);
}
static zend_always_inline zval** zend_vm_stack_get_arg(int requested_arg TSRMLS_DC)
{
return zend_vm_stack_get_arg_ex(EG(current_execute_data)->prev_execute_data, requested_arg);
}
void execute_new_code(TSRMLS_D);
/* 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(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(const char *class_name, uint class_name_len, int fetch_type TSRMLS_DC);
ZEND_API zend_class_entry *zend_fetch_class_by_name(const char *class_name, uint class_name_len, const zend_literal *key, int fetch_type TSRMLS_DC);
void zend_verify_abstract_class(zend_class_entry *ce 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
#define zendi_zval_copy_ctor(p) zval_copy_ctor(&(p))
#define zendi_zval_dtor(p) zval_dtor(&(p))
#define active_opline (*EG(opline_ptr))
/* The following tries to resolve the classname of a zval of type object.
* Since it is slow it should be only used in error messages.
*/
#define Z_OBJ_CLASS_NAME_P(zval) ((zval) && Z_TYPE_P(zval) == IS_OBJECT && Z_OBJ_HT_P(zval)->get_class_entry != NULL && Z_OBJ_HT_P(zval)->get_class_entry(zval TSRMLS_CC) ? Z_OBJ_HT_P(zval)->get_class_entry(zval TSRMLS_CC)->name : "")
ZEND_API zval** zend_get_compiled_variable_value(const zend_execute_data *execute_data_ptr, zend_uint 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 struct _zend_free_op {
zval* var;
/* int is_var; */
} 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 zval **zend_get_zval_ptr_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);
void zend_clean_and_cache_symbol_table(HashTable *symbol_table TSRMLS_DC);
void zend_free_compiled_variables(zend_execute_data *execute_data);
#define CACHED_PTR(num) \
EG(active_op_array)->run_time_cache[(num)]
#define CACHE_PTR(num, ptr) do { \
EG(active_op_array)->run_time_cache[(num)] = (ptr); \
} while (0)
#define CACHED_POLYMORPHIC_PTR(num, ce) \
((EG(active_op_array)->run_time_cache[(num)] == (ce)) ? \
EG(active_op_array)->run_time_cache[(num) + 1] : \
NULL)
#define CACHE_POLYMORPHIC_PTR(num, ce, ptr) do { \
EG(active_op_array)->run_time_cache[(num)] = (ce); \
EG(active_op_array)->run_time_cache[(num) + 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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