mirror of
https://github.com/php/php-src.git
synced 2024-09-22 02:17:32 +00:00
359 lines
10 KiB
C
359 lines
10 KiB
C
/*
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+----------------------------------------------------------------------+
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| Zend Engine |
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+----------------------------------------------------------------------+
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| Copyright (c) 1998-2008 Zend Technologies Ltd. (http://www.zend.com) |
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+----------------------------------------------------------------------+
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| This source file is subject to version 2.00 of the Zend license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.zend.com/license/2_00.txt. |
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| If you did not receive a copy of the Zend license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@zend.com so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: Andi Gutmans <andi@zend.com> |
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| Zeev Suraski <zeev@zend.com> |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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#ifndef ZEND_EXECUTE_H
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#define ZEND_EXECUTE_H
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#include "zend_compile.h"
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#include "zend_hash.h"
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#include "zend_operators.h"
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#include "zend_variables.h"
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typedef union _temp_variable {
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zval tmp_var;
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struct {
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zval **ptr_ptr;
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zval *ptr;
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zend_bool fcall_returned_reference;
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} var;
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struct {
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zval **ptr_ptr;
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zval *ptr;
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zend_bool fcall_returned_reference;
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zval *str;
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zend_uint offset;
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} str_offset;
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struct {
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zval **ptr_ptr;
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zval *ptr;
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zend_bool fcall_returned_reference;
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HashPointer fe_pos;
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} fe;
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zend_class_entry *class_entry;
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} temp_variable;
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BEGIN_EXTERN_C()
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ZEND_API extern void (*zend_execute)(zend_op_array *op_array TSRMLS_DC);
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ZEND_API extern void (*zend_execute_internal)(zend_execute_data *execute_data_ptr, int return_value_used TSRMLS_DC);
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void init_executor(TSRMLS_D);
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void shutdown_executor(TSRMLS_D);
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void shutdown_destructors(TSRMLS_D);
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ZEND_API void execute(zend_op_array *op_array TSRMLS_DC);
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ZEND_API void execute_internal(zend_execute_data *execute_data_ptr, int return_value_used TSRMLS_DC);
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ZEND_API int zend_is_true(zval *op);
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#define safe_free_zval_ptr(p) safe_free_zval_ptr_rel(p ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC)
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static inline void safe_free_zval_ptr_rel(zval *p ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)
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{
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TSRMLS_FETCH();
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if (p!=EG(uninitialized_zval_ptr)) {
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FREE_ZVAL_REL(p);
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}
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}
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ZEND_API int zend_lookup_class(const char *name, int name_length, zend_class_entry ***ce TSRMLS_DC);
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ZEND_API int zend_lookup_class_ex(const char *name, int name_length, int use_autoload, zend_class_entry ***ce TSRMLS_DC);
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ZEND_API int zend_eval_string(char *str, zval *retval_ptr, char *string_name TSRMLS_DC);
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ZEND_API int zend_eval_string_ex(char *str, zval *retval_ptr, char *string_name, int handle_exceptions TSRMLS_DC);
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static inline int i_zend_is_true(zval *op)
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{
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int result;
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switch (Z_TYPE_P(op)) {
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case IS_NULL:
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result = 0;
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break;
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case IS_LONG:
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case IS_BOOL:
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case IS_RESOURCE:
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result = (Z_LVAL_P(op)?1:0);
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break;
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case IS_DOUBLE:
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result = (Z_DVAL_P(op) ? 1 : 0);
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break;
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case IS_STRING:
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if (Z_STRLEN_P(op) == 0
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|| (Z_STRLEN_P(op)==1 && Z_STRVAL_P(op)[0]=='0')) {
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result = 0;
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} else {
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result = 1;
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}
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break;
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case IS_ARRAY:
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result = (zend_hash_num_elements(Z_ARRVAL_P(op))?1:0);
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break;
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case IS_OBJECT:
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if(IS_ZEND_STD_OBJECT(*op)) {
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TSRMLS_FETCH();
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if (Z_OBJ_HT_P(op)->cast_object) {
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zval tmp;
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if (Z_OBJ_HT_P(op)->cast_object(op, &tmp, IS_BOOL TSRMLS_CC) == SUCCESS) {
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result = Z_LVAL(tmp);
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break;
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}
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} else if (Z_OBJ_HT_P(op)->get) {
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zval *tmp = Z_OBJ_HT_P(op)->get(op TSRMLS_CC);
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if(Z_TYPE_P(tmp) != IS_OBJECT) {
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/* for safety - avoid loop */
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convert_to_boolean(tmp);
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result = Z_LVAL_P(tmp);
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zval_ptr_dtor(&tmp);
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break;
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}
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}
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}
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result = 1;
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break;
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default:
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result = 0;
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break;
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}
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return result;
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}
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ZEND_API int zval_update_constant(zval **pp, void *arg TSRMLS_DC);
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ZEND_API int zval_update_constant_ex(zval **pp, void *arg, zend_class_entry *scope TSRMLS_DC);
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/* dedicated Zend executor functions - do not use! */
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#define ZEND_VM_STACK_PAGE_SIZE ((64 * 1024) - 64)
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struct _zend_vm_stack {
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void **top;
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void **end;
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zend_vm_stack prev;
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void *elements[1];
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};
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#define ZEND_VM_STACK_GROW_IF_NEEDED(count) \
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do { \
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if (UNEXPECTED((count) > \
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EG(argument_stack)->end - EG(argument_stack)->top)) { \
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zend_vm_stack_extend((count) TSRMLS_CC); \
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} \
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} while (0)
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static inline zend_vm_stack zend_vm_stack_new_page(int count) {
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zend_vm_stack page = (zend_vm_stack)emalloc(sizeof(*page)+sizeof(page->elements[0])*(count-1));
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page->top = page->elements;
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page->end = page->elements + count;
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page->prev = NULL;
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return page;
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}
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static inline void zend_vm_stack_init(TSRMLS_D)
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{
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EG(argument_stack) = zend_vm_stack_new_page(ZEND_VM_STACK_PAGE_SIZE);
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}
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static inline void zend_vm_stack_destroy(TSRMLS_D)
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{
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zend_vm_stack stack = EG(argument_stack);
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while (stack != NULL) {
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zend_vm_stack p = stack->prev;
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efree(stack);
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stack = p;
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}
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}
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static inline void zend_vm_stack_extend(int count TSRMLS_DC)
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{
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zend_vm_stack p = zend_vm_stack_new_page(count >= ZEND_VM_STACK_PAGE_SIZE ? count : ZEND_VM_STACK_PAGE_SIZE);
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p->prev = EG(argument_stack);
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EG(argument_stack) = p;
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}
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static inline void **zend_vm_stack_top(TSRMLS_D)
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{
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return EG(argument_stack)->top;
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}
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static inline void zend_vm_stack_push(void *ptr TSRMLS_DC)
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{
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ZEND_VM_STACK_GROW_IF_NEEDED(1);
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*(EG(argument_stack)->top++) = ptr;
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}
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static inline void zend_vm_stack_push_nocheck(void *ptr TSRMLS_DC)
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{
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*(EG(argument_stack)->top++) = ptr;
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}
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static inline void *zend_vm_stack_pop(TSRMLS_D)
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{
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void *el = *(--EG(argument_stack)->top);
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if (UNEXPECTED(EG(argument_stack)->top == EG(argument_stack)->elements)) {
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zend_vm_stack p = EG(argument_stack);
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EG(argument_stack) = p->prev;
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efree(p);
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}
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return el;
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}
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static inline void *zend_vm_stack_alloc(size_t size TSRMLS_DC)
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{
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void *ret;
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size = (size + (sizeof(void*) - 1)) / sizeof(void*);
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ZEND_VM_STACK_GROW_IF_NEEDED((int)size);
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ret = (void*)EG(argument_stack)->top;
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EG(argument_stack)->top += size;
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return ret;
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}
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static inline void zend_vm_stack_free(void *ptr TSRMLS_DC)
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{
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if (UNEXPECTED(EG(argument_stack)->elements == (void**)ptr)) {
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zend_vm_stack p = EG(argument_stack);
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EG(argument_stack) = p->prev;
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efree(p);
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} else {
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EG(argument_stack)->top = (void**)ptr;
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}
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}
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static inline void** zend_vm_stack_push_args(int count TSRMLS_DC)
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{
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if (UNEXPECTED(EG(argument_stack)->top - EG(argument_stack)->elements < count) ||
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UNEXPECTED(EG(argument_stack)->top == EG(argument_stack)->end)) {
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zend_vm_stack p = EG(argument_stack);
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zend_vm_stack_extend(count + 1 TSRMLS_CC);
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EG(argument_stack)->top += count;
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*(EG(argument_stack)->top) = (void*)(zend_uintptr_t)count;
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while (count-- > 0) {
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void *data = *(--p->top);
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if (UNEXPECTED(p->top == p->elements)) {
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zend_vm_stack r = p;
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EG(argument_stack)->prev = p->prev;
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p = p->prev;
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efree(r);
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}
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*(EG(argument_stack)->elements + count) = data;
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}
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return EG(argument_stack)->top++;
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}
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*(EG(argument_stack)->top) = (void*)(zend_uintptr_t)count;
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return EG(argument_stack)->top++;
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}
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static inline void zend_vm_stack_clear_multiple(TSRMLS_D)
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{
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void **p = EG(argument_stack)->top - 1;
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int delete_count = (int)(zend_uintptr_t) *p;
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while (--delete_count>=0) {
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zval *q = *(zval **)(--p);
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*p = NULL;
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zval_ptr_dtor(&q);
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}
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zend_vm_stack_free(p TSRMLS_CC);
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}
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static inline zval** zend_vm_stack_get_arg(int requested_arg TSRMLS_DC)
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{
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void **p = EG(current_execute_data)->prev_execute_data->function_state.arguments;
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int arg_count = (int)(zend_uintptr_t) *p;
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if (UNEXPECTED(requested_arg > arg_count)) {
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return NULL;
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}
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return (zval**)p - arg_count + requested_arg - 1;
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}
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void execute_new_code(TSRMLS_D);
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/* services */
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ZEND_API char *get_active_class_name(char **space TSRMLS_DC);
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ZEND_API char *get_active_function_name(TSRMLS_D);
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ZEND_API char *zend_get_executed_filename(TSRMLS_D);
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ZEND_API uint zend_get_executed_lineno(TSRMLS_D);
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ZEND_API zend_bool zend_is_executing(TSRMLS_D);
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ZEND_API void zend_set_timeout(long seconds, int reset_signals);
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ZEND_API void zend_unset_timeout(TSRMLS_D);
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ZEND_API void zend_timeout(int dummy);
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ZEND_API zend_class_entry *zend_fetch_class(const char *class_name, uint class_name_len, int fetch_type TSRMLS_DC);
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void zend_verify_abstract_class(zend_class_entry *ce TSRMLS_DC);
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#ifdef ZEND_WIN32
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void zend_init_timeout_thread(void);
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void zend_shutdown_timeout_thread(void);
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#define WM_REGISTER_ZEND_TIMEOUT (WM_USER+1)
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#define WM_UNREGISTER_ZEND_TIMEOUT (WM_USER+2)
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#endif
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#define zendi_zval_copy_ctor(p) zval_copy_ctor(&(p))
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#define zendi_zval_dtor(p) zval_dtor(&(p))
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#define active_opline (*EG(opline_ptr))
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/* The following tries to resolve the classname of a zval of type object.
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* Since it is slow it should be only used in error messages.
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*/
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#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 : "")
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ZEND_API zval** zend_get_compiled_variable_value(zend_execute_data *execute_data_ptr, zend_uint var);
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#define ZEND_USER_OPCODE_CONTINUE 0 /* execute next opcode */
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#define ZEND_USER_OPCODE_RETURN 1 /* exit from executor (return from function) */
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#define ZEND_USER_OPCODE_DISPATCH 2 /* call original opcode handler */
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#define ZEND_USER_OPCODE_DISPATCH_TO 0x100 /* call original handler of returned opcode */
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ZEND_API int zend_set_user_opcode_handler(zend_uchar opcode, user_opcode_handler_t handler);
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ZEND_API user_opcode_handler_t zend_get_user_opcode_handler(zend_uchar opcode);
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/* former zend_execute_locks.h */
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typedef struct _zend_free_op {
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zval* var;
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/* int is_var; */
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} zend_free_op;
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ZEND_API zval *zend_get_zval_ptr(znode *node, temp_variable *Ts, zend_free_op *should_free, int type TSRMLS_DC);
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ZEND_API zval **zend_get_zval_ptr_ptr(znode *node, temp_variable *Ts, zend_free_op *should_free, int type TSRMLS_DC);
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ZEND_API int zend_do_fcall(ZEND_OPCODE_HANDLER_ARGS);
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END_EXTERN_C()
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#endif /* ZEND_EXECUTE_H */
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* indent-tabs-mode: t
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* End:
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*/
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