mirror of
https://github.com/php/php-src.git
synced 2024-12-04 07:14:10 +08:00
709 lines
18 KiB
C
709 lines
18 KiB
C
/*
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+----------------------------------------------------------------------+
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| Zend Engine |
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+----------------------------------------------------------------------+
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| Copyright (c) 1998-2000 Zend Technologies Ltd. (http://www.zend.com) |
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+----------------------------------------------------------------------+
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| This source file is subject to version 0.92 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 at through the world-wide-web at |
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| http://www.zend.com/license/0_92.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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#include <stdio.h>
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#include <signal.h>
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#include "zend.h"
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#include "zend_compile.h"
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#include "zend_execute.h"
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#include "zend_API.h"
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#include "zend_ptr_stack.h"
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#include "zend_constants.h"
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#include "zend_extensions.h"
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#include "zend_execute_locks.h"
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#if HAVE_SYS_TIME_H
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#include <sys/time.h>
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#endif
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ZEND_API void (*zend_execute)(zend_op_array *op_array ELS_DC);
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#ifdef ZEND_WIN32
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#include <process.h>
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/* true global */
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static WNDCLASS wc;
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static HWND timeout_window;
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static HANDLE timeout_thread_event;
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static DWORD timeout_thread_id;
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static int timeout_thread_initialized=0;
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#endif
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#if ZEND_DEBUG
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static void (*original_sigsegv_handler)(int);
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static void zend_handle_sigsegv(int dummy)
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{
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fflush(stdout);
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fflush(stderr);
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if (original_sigsegv_handler==zend_handle_sigsegv) {
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signal(SIGSEGV, original_sigsegv_handler);
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} else {
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signal(SIGSEGV, SIG_DFL);
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}
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{
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ELS_FETCH();
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fprintf(stderr, "SIGSEGV caught on opcode %d on opline %d of %s() at %s:%d\n\n",
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active_opline->opcode,
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active_opline-EG(active_op_array)->opcodes,
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get_active_function_name(),
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zend_get_executed_filename(ELS_C),
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zend_get_executed_lineno(ELS_C));
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}
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if (original_sigsegv_handler!=zend_handle_sigsegv) {
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original_sigsegv_handler(dummy);
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}
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}
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#endif
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static void zend_extension_activator(zend_extension *extension)
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{
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if (extension->activate) {
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extension->activate();
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}
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}
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static void zend_extension_deactivator(zend_extension *extension)
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{
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if (extension->deactivate) {
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extension->deactivate();
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}
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}
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static int is_not_internal_function(zend_function *function)
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{
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return(function->type != ZEND_INTERNAL_FUNCTION);
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}
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static int is_not_internal_class(zend_class_entry *ce)
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{
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return(ce->type != ZEND_INTERNAL_CLASS);
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}
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void init_executor(CLS_D ELS_DC)
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{
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INIT_ZVAL(EG(uninitialized_zval));
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INIT_ZVAL(EG(error_zval));
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EG(uninitialized_zval_ptr)=&EG(uninitialized_zval);
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EG(error_zval_ptr)=&EG(error_zval);
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zend_ptr_stack_init(&EG(arg_types_stack));
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/* destroys stack frame, therefore makes core dumps worthless */
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#if 0&&ZEND_DEBUG
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original_sigsegv_handler = signal(SIGSEGV, zend_handle_sigsegv);
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#endif
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EG(return_value_ptr_ptr) = &EG(global_return_value_ptr);
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EG(global_return_value_ptr) = NULL;
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EG(symtable_cache_ptr) = EG(symtable_cache)-1;
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EG(symtable_cache_limit)=EG(symtable_cache)+SYMTABLE_CACHE_SIZE-1;
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EG(no_extensions)=0;
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EG(function_table) = CG(function_table);
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EG(class_table) = CG(class_table);
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EG(in_execution) = 0;
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zend_ptr_stack_init(&EG(argument_stack));
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zend_hash_init(&EG(symbol_table), 50, NULL, ZVAL_PTR_DTOR, 0);
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EG(active_symbol_table) = &EG(symbol_table);
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zend_llist_apply(&zend_extensions, (void (*)(void *)) zend_extension_activator);
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EG(opline_ptr) = NULL;
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EG(garbage_ptr) = 0;
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zend_hash_init(&EG(included_files), 5, NULL, NULL, 0);
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EG(ticks_count) = 0;
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EG(user_error_handler) = NULL;
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zend_ptr_stack_init(&EG(user_error_handlers));
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EG(orig_error_reporting) = EG(error_reporting);
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#ifdef ZEND_WIN32
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EG(timed_out) = 0;
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#endif
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}
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void shutdown_executor(ELS_D)
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{
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zend_ptr_stack_destroy(&EG(arg_types_stack));
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while (EG(symtable_cache_ptr)>=EG(symtable_cache)) {
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zend_hash_destroy(*EG(symtable_cache_ptr));
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efree(*EG(symtable_cache_ptr));
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EG(symtable_cache_ptr)--;
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}
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zend_llist_apply(&zend_extensions, (void (*)(void *)) zend_extension_deactivator);
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zend_hash_destroy(&EG(symbol_table));
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while (EG(garbage_ptr)--) {
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if (EG(garbage)[EG(garbage_ptr)]->refcount==1) {
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zval_ptr_dtor(&EG(garbage)[EG(garbage_ptr)]);
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}
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}
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zend_ptr_stack_destroy(&EG(argument_stack));
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/* Destroy all op arrays */
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zend_hash_apply(EG(function_table), (int (*)(void *)) is_not_internal_function);
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zend_hash_apply(EG(class_table), (int (*)(void *)) is_not_internal_class);
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zend_destroy_rsrc_list(ELS_C); /* must be destroyed after the main symbol table and
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* op arrays are destroyed.
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*/
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clean_non_persistent_constants();
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#if ZEND_DEBUG
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signal(SIGSEGV, original_sigsegv_handler);
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#endif
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zend_hash_destroy(&EG(included_files));
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if (EG(user_error_handler)) {
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zval_dtor(EG(user_error_handler));
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FREE_ZVAL(EG(user_error_handler));
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}
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zend_ptr_stack_clean(&EG(user_error_handlers), ZVAL_DESTRUCTOR, 1);
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zend_ptr_stack_destroy(&EG(user_error_handlers));
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EG(error_reporting) = EG(orig_error_reporting);
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}
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ZEND_API char *get_active_function_name()
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{
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ELS_FETCH();
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switch(EG(function_state_ptr)->function->type) {
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case ZEND_USER_FUNCTION: {
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char *function_name = ((zend_op_array *) EG(function_state_ptr)->function)->function_name;
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if (function_name) {
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return function_name;
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} else {
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return "main";
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}
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}
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break;
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case ZEND_INTERNAL_FUNCTION:
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return ((zend_internal_function *) EG(function_state_ptr)->function)->function_name;
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break;
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default:
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return NULL;
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}
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}
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ZEND_API char *zend_get_executed_filename(ELS_D)
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{
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if (EG(active_op_array)) {
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return EG(active_op_array)->filename;
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} else {
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return "[no active file]";
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}
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}
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ZEND_API uint zend_get_executed_lineno(ELS_D)
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{
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if (EG(opline_ptr)) {
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return active_opline->lineno;
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} else {
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return 0;
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}
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}
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ZEND_API zend_bool zend_is_executing()
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{
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ELS_FETCH();
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return EG(in_execution);
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}
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ZEND_API void _zval_ptr_dtor(zval **zval_ptr ZEND_FILE_LINE_DC)
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{
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#if DEBUG_ZEND>=2
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printf("Reducing refcount for %x (%x): %d->%d\n", *zval_ptr, zval_ptr, (*zval_ptr)->refcount, (*zval_ptr)->refcount-1);
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#endif
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(*zval_ptr)->refcount--;
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if ((*zval_ptr)->refcount==0) {
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zval_dtor(*zval_ptr);
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safe_free_zval_ptr(*zval_ptr);
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} else if (((*zval_ptr)->refcount == 1) && ((*zval_ptr)->type != IS_OBJECT)) {
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(*zval_ptr)->is_ref = 0;
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}
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}
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ZEND_API int zend_is_true(zval *op)
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{
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return i_zend_is_true(op);
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}
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ZEND_API int zval_update_constant(zval **pp, void *arg)
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{
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zval *p = *pp;
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zend_bool inline_change = (zend_bool) (unsigned long) arg;
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if (p->type == IS_CONSTANT) {
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zval c;
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int refcount;
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SEPARATE_ZVAL(pp);
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p = *pp;
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refcount = p->refcount;
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if (!zend_get_constant(p->value.str.val, p->value.str.len, &c)) {
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zend_error(E_NOTICE, "Use of undefined constant %s - assumed '%s'",
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p->value.str.val,
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p->value.str.val);
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p->type = IS_STRING;
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if (!inline_change) {
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zval_copy_ctor(p);
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}
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} else {
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if (inline_change) {
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STR_FREE(p->value.str.val);
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}
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*p = c;
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}
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INIT_PZVAL(p);
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p->refcount = refcount;
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} else if (p->type == IS_CONSTANT_ARRAY) {
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SEPARATE_ZVAL(pp);
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p = *pp;
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p->type = IS_ARRAY;
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zend_hash_apply_with_argument(p->value.ht, (int (*)(void *,void *)) zval_update_constant, (void *) 1);
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}
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return 0;
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}
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int call_user_function(HashTable *function_table, zval *object, zval *function_name, zval *retval_ptr, int param_count, zval *params[])
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{
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zval ***params_array = (zval ***) emalloc(sizeof(zval **)*param_count);
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int i;
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int ex_retval;
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zval *local_retval_ptr;
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for (i=0; i<param_count; i++) {
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params_array[i] = ¶ms[i];
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}
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ex_retval = call_user_function_ex(function_table, object, function_name, &local_retval_ptr, param_count, params_array, 1, NULL);
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if (local_retval_ptr) {
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COPY_PZVAL_TO_ZVAL(*retval_ptr, local_retval_ptr);
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} else {
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INIT_ZVAL(*retval_ptr);
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}
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efree(params_array);
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return ex_retval;
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}
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int call_user_function_ex(HashTable *function_table, zval *object, zval *function_name, zval **retval_ptr_ptr, int param_count, zval **params[], int no_separation, HashTable *symbol_table)
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{
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int i;
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zval **original_return_value;
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HashTable *calling_symbol_table;
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zend_function_state function_state;
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zend_function_state *original_function_state_ptr;
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zend_op_array *original_op_array;
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zend_op **original_opline_ptr;
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ELS_FETCH();
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*retval_ptr_ptr = NULL;
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if (function_name->type==IS_ARRAY) { /* assume array($obj, $name) couple */
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zval **tmp_object_ptr, **tmp_real_function_name;
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if (zend_hash_index_find(function_name->value.ht, 0, (void **) &tmp_object_ptr)==FAILURE) {
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return FAILURE;
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}
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if (zend_hash_index_find(function_name->value.ht, 1, (void **) &tmp_real_function_name)==FAILURE) {
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return FAILURE;
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}
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function_name = *tmp_real_function_name;
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SEPARATE_ZVAL_IF_NOT_REF(tmp_object_ptr);
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object = *tmp_object_ptr;
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object->is_ref = 1;
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}
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if (object) {
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if (object->type != IS_OBJECT) {
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return FAILURE;
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}
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function_table = &object->value.obj.ce->function_table;
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}
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if (function_name->type!=IS_STRING) {
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return FAILURE;
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}
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original_function_state_ptr = EG(function_state_ptr);
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zend_str_tolower(function_name->value.str.val, function_name->value.str.len);
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if (zend_hash_find(function_table, function_name->value.str.val, function_name->value.str.len+1, (void **) &function_state.function)==FAILURE) {
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return FAILURE;
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}
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for (i=0; i<param_count; i++) {
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zval *param;
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if (function_state.function->common.arg_types
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&& i<function_state.function->common.arg_types[0]
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&& function_state.function->common.arg_types[i+1]==BYREF_FORCE
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&& !PZVAL_IS_REF(*params[i])) {
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if ((*params[i])->refcount>1) {
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zval *new_zval;
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if (no_separation) {
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return FAILURE;
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}
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ALLOC_ZVAL(new_zval);
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*new_zval = **params[i];
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zval_copy_ctor(new_zval);
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new_zval->refcount = 1;
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(*params[i])->refcount--;
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*params[i] = new_zval;
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}
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(*params[i])->refcount++;
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(*params[i])->is_ref = 1;
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param = *params[i];
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} else if (*params[i] != &EG(uninitialized_zval)) {
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(*params[i])->refcount++;
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param = *params[i];
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} else {
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ALLOC_ZVAL(param);
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*param = **(params[i]);
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INIT_PZVAL(param);
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}
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zend_ptr_stack_push(&EG(argument_stack), param);
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}
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zend_ptr_stack_n_push(&EG(argument_stack), 2, (void *) (long) param_count, NULL);
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if (function_state.function->type == ZEND_USER_FUNCTION) {
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calling_symbol_table = EG(active_symbol_table);
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if (symbol_table) {
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EG(active_symbol_table) = symbol_table;
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} else {
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ALLOC_HASHTABLE(EG(active_symbol_table));
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zend_hash_init(EG(active_symbol_table), 0, NULL, ZVAL_PTR_DTOR, 0);
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}
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if (object) {
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zval *dummy, **this_ptr;
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ALLOC_ZVAL(dummy);
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INIT_ZVAL(*dummy);
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zend_hash_update(EG(active_symbol_table), "this", sizeof("this"), &dummy, sizeof(zval *), (void **) &this_ptr);
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zend_assign_to_variable_reference(NULL, this_ptr, &object, NULL ELS_CC);
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}
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original_return_value = EG(return_value_ptr_ptr);
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original_op_array = EG(active_op_array);
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EG(return_value_ptr_ptr) = retval_ptr_ptr;
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EG(active_op_array) = (zend_op_array *) function_state.function;
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original_opline_ptr = EG(opline_ptr);
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zend_execute(EG(active_op_array) ELS_CC);
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if (!symbol_table) {
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zend_hash_destroy(EG(active_symbol_table));
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FREE_HASHTABLE(EG(active_symbol_table));
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}
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EG(active_symbol_table) = calling_symbol_table;
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EG(active_op_array) = original_op_array;
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EG(return_value_ptr_ptr)=original_return_value;
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EG(opline_ptr) = original_opline_ptr;
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} else {
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ALLOC_INIT_ZVAL(*retval_ptr_ptr);
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((zend_internal_function *) function_state.function)->handler(param_count, *retval_ptr_ptr, object, 1 ELS_CC);
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INIT_PZVAL(*retval_ptr_ptr);
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}
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zend_ptr_stack_clear_multiple(ELS_C);
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EG(function_state_ptr) = original_function_state_ptr;
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return SUCCESS;
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}
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ZEND_API int zend_eval_string(char *str, zval *retval_ptr, char *string_name CLS_DC ELS_DC)
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{
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zval pv;
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zend_op_array *new_op_array;
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zend_op_array *original_active_op_array = EG(active_op_array);
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zend_function_state *original_function_state_ptr = EG(function_state_ptr);
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int original_handle_op_arrays;
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int retval;
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if (retval_ptr) {
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pv.value.str.len = strlen(str)+sizeof("return ;")-1;
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pv.value.str.val = emalloc(pv.value.str.len+1);
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strcpy(pv.value.str.val, "return ");
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strcat(pv.value.str.val, str);
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strcat(pv.value.str.val, " ;");
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} else {
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pv.value.str.len = strlen(str);
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pv.value.str.val = estrndup(str, pv.value.str.len);
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}
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pv.type = IS_STRING;
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/*printf("Evaluating '%s'\n", pv.value.str.val);*/
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original_handle_op_arrays = CG(handle_op_arrays);
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CG(handle_op_arrays) = 0;
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new_op_array = compile_string(&pv, string_name CLS_CC);
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CG(handle_op_arrays) = original_handle_op_arrays;
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if (new_op_array) {
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zval *local_retval_ptr=NULL;
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zval **original_return_value_ptr_ptr = EG(return_value_ptr_ptr);
|
|
zend_op **original_opline_ptr = EG(opline_ptr);
|
|
|
|
EG(return_value_ptr_ptr) = &local_retval_ptr;
|
|
EG(active_op_array) = new_op_array;
|
|
EG(no_extensions)=1;
|
|
|
|
zend_execute(new_op_array ELS_CC);
|
|
|
|
if (local_retval_ptr) {
|
|
if (retval_ptr) {
|
|
COPY_PZVAL_TO_ZVAL(*retval_ptr, local_retval_ptr);
|
|
} else {
|
|
zval_ptr_dtor(&local_retval_ptr);
|
|
}
|
|
} else {
|
|
if (retval_ptr) {
|
|
INIT_ZVAL(*retval_ptr);
|
|
}
|
|
}
|
|
|
|
EG(no_extensions)=0;
|
|
EG(opline_ptr) = original_opline_ptr;
|
|
EG(active_op_array) = original_active_op_array;
|
|
EG(function_state_ptr) = original_function_state_ptr;
|
|
destroy_op_array(new_op_array);
|
|
efree(new_op_array);
|
|
EG(return_value_ptr_ptr) = original_return_value_ptr_ptr;
|
|
retval = SUCCESS;
|
|
} else {
|
|
retval = FAILURE;
|
|
}
|
|
zval_dtor(&pv);
|
|
return retval;
|
|
}
|
|
|
|
|
|
|
|
#if SUPPORT_INTERACTIVE
|
|
void execute_new_code(CLS_D)
|
|
{
|
|
ELS_FETCH();
|
|
|
|
if (!EG(interactive)
|
|
|| CG(active_op_array)->backpatch_count>0
|
|
|| CG(active_op_array)->function_name
|
|
|| CG(active_op_array)->type!=ZEND_USER_FUNCTION) {
|
|
return;
|
|
}
|
|
CG(active_op_array)->start_op_number = CG(active_op_array)->last_executed_op_number;
|
|
CG(active_op_array)->end_op_number = CG(active_op_array)->last;
|
|
EG(active_op_array) = CG(active_op_array);
|
|
zend_execute(CG(active_op_array) ELS_CC);
|
|
zval_ptr_dtor(EG(return_value_ptr_ptr));
|
|
CG(active_op_array)->start_op_number = CG(active_op_array)->last_executed_op_number;
|
|
}
|
|
#endif
|
|
|
|
|
|
ZEND_API void zend_timeout(int dummy)
|
|
{
|
|
ELS_FETCH();
|
|
|
|
/* is there any point in this? we're terminating the request anyway...
|
|
PLS_FETCH();
|
|
|
|
PG(connection_status) |= PHP_CONNECTION_TIMEOUT;
|
|
*/
|
|
zend_error(E_ERROR, "Maximum execution time of %d second%s exceeded",
|
|
EG(timeout_seconds), EG(timeout_seconds) == 1 ? "" : "s");
|
|
}
|
|
|
|
|
|
#ifdef ZEND_WIN32
|
|
static LRESULT CALLBACK zend_timeout_WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
|
|
{
|
|
switch (message) {
|
|
case WM_DESTROY:
|
|
PostQuitMessage(0);
|
|
break;
|
|
case WM_REGISTER_ZEND_TIMEOUT:
|
|
/* wParam is the thread id pointer, lParam is the timeout amount in seconds */
|
|
if (lParam==0) {
|
|
KillTimer(timeout_window, wParam);
|
|
} else {
|
|
SetTimer(timeout_window, wParam, lParam*1000, NULL);
|
|
}
|
|
break;
|
|
case WM_UNREGISTER_ZEND_TIMEOUT:
|
|
/* wParam is the thread id pointer */
|
|
KillTimer(timeout_window, wParam);
|
|
break;
|
|
case WM_TIMER: {
|
|
#ifdef ZTS
|
|
zend_executor_globals *executor_globals;
|
|
|
|
executor_globals = ts_resource_ex(executor_globals_id, &wParam);
|
|
if (!executor_globals) {
|
|
/* Thread died before receiving its timeout? */
|
|
break;
|
|
}
|
|
#endif
|
|
KillTimer(timeout_window, wParam);
|
|
EG(timed_out) = 1;
|
|
}
|
|
break;
|
|
default:
|
|
return DefWindowProc(hWnd,message,wParam,lParam);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
|
|
|
|
static unsigned __stdcall timeout_thread_proc(void *pArgs)
|
|
{
|
|
MSG message;
|
|
|
|
wc.style=0;
|
|
wc.lpfnWndProc = zend_timeout_WndProc;
|
|
wc.cbClsExtra=0;
|
|
wc.cbWndExtra=0;
|
|
wc.hInstance=NULL;
|
|
wc.hIcon=NULL;
|
|
wc.hCursor=NULL;
|
|
wc.hbrBackground=(HBRUSH)(COLOR_BACKGROUND + 5);
|
|
wc.lpszMenuName=NULL;
|
|
wc.lpszClassName = "Zend Timeout Window";
|
|
if(!RegisterClass(&wc)) {
|
|
return -1;
|
|
}
|
|
timeout_window = CreateWindow(wc.lpszClassName, wc.lpszClassName, 0, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, NULL, NULL, NULL, NULL);
|
|
SetEvent(timeout_thread_event);
|
|
while (GetMessage(&message, NULL, 0, 0)) {
|
|
SendMessage(timeout_window, message.message, message.wParam, message.lParam);
|
|
if (message.message == WM_QUIT) {
|
|
break;
|
|
}
|
|
}
|
|
DestroyWindow(timeout_window);
|
|
UnregisterClass(wc.lpszClassName, NULL);
|
|
return 0;
|
|
}
|
|
|
|
|
|
void zend_init_timeout_thread()
|
|
{
|
|
timeout_thread_event = CreateEvent(NULL, FALSE, FALSE, NULL);
|
|
_beginthreadex(NULL, 0, timeout_thread_proc, NULL, 0, &timeout_thread_id);
|
|
WaitForSingleObject(timeout_thread_event, INFINITE);
|
|
}
|
|
|
|
|
|
void zend_shutdown_timeout_thread()
|
|
{
|
|
if (!timeout_thread_initialized) {
|
|
return;
|
|
}
|
|
PostThreadMessage(timeout_thread_id, WM_QUIT, 0, 0);
|
|
}
|
|
|
|
#endif
|
|
|
|
/* This one doesn't exists on QNX */
|
|
#ifndef SIGPROF
|
|
#define SIGPROF 27
|
|
#endif
|
|
|
|
void zend_set_timeout(long seconds)
|
|
{
|
|
ELS_FETCH();
|
|
|
|
EG(timeout_seconds) = seconds;
|
|
#ifdef ZEND_WIN32
|
|
if (timeout_thread_initialized==0 && InterlockedIncrement(&timeout_thread_initialized)==1) {
|
|
/* We start up this process-wide thread here and not in zend_startup(), because if Zend
|
|
* is initialized inside a DllMain(), you're not supposed to start threads from it.
|
|
*/
|
|
zend_init_timeout_thread();
|
|
}
|
|
PostThreadMessage(timeout_thread_id, WM_REGISTER_ZEND_TIMEOUT, (WPARAM) GetCurrentThreadId(), (LPARAM) seconds);
|
|
#else
|
|
# ifdef HAVE_SETITIMER
|
|
{
|
|
struct itimerval t_r; /* timeout requested */
|
|
sigset_t sigset;
|
|
|
|
t_r.it_value.tv_sec = seconds;
|
|
t_r.it_value.tv_usec = t_r.it_interval.tv_sec = t_r.it_interval.tv_usec = 0;
|
|
|
|
setitimer(ITIMER_PROF, &t_r, NULL);
|
|
signal(SIGPROF, zend_timeout);
|
|
sigemptyset(&sigset);
|
|
sigaddset(&sigset, SIGPROF);
|
|
sigprocmask(SIG_UNBLOCK,&sigset,NULL);
|
|
}
|
|
# endif
|
|
#endif
|
|
}
|
|
|
|
|
|
void zend_unset_timeout(void)
|
|
{
|
|
ELS_FETCH();
|
|
|
|
#ifdef ZEND_WIN32
|
|
PostThreadMessage(timeout_thread_id, WM_UNREGISTER_ZEND_TIMEOUT, (WPARAM) GetCurrentThreadId(), (LPARAM) 0);
|
|
#else
|
|
# ifdef HAVE_SETITIMER
|
|
{
|
|
struct itimerval no_timeout;
|
|
|
|
no_timeout.it_value.tv_sec = no_timeout.it_value.tv_usec = no_timeout.it_interval.tv_sec = no_timeout.it_interval.tv_usec = 0;
|
|
|
|
setitimer(ITIMER_PROF, &no_timeout, NULL);
|
|
}
|
|
# endif
|
|
#endif
|
|
}
|