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php-src/Zend/zend_execute_API.c
Zeev Suraski eb6fd52e21 - Rename compatiblity mode to zend.ze2_compatibility_mode (it doesn't only affect auto-clone). 
- Perform implementation checks even with simple inheritance (off when
  compatibility mode is enabled).
- Restore default arguments in interfaces and handle it correctly.
- Move registration of internal classes later in the startup sequence
  in order to have INI options available.
2004-02-25 10:57:10 +00:00

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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2004 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> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include <stdio.h>
#include <signal.h>
#include "zend.h"
#include "zend_compile.h"
#include "zend_execute.h"
#include "zend_API.h"
#include "zend_ptr_stack.h"
#include "zend_constants.h"
#include "zend_extensions.h"
#include "zend_exceptions.h"
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
ZEND_API void (*zend_execute)(zend_op_array *op_array TSRMLS_DC);
ZEND_API void (*zend_execute_internal)(zend_execute_data *execute_data_ptr, int return_value_used TSRMLS_DC);
/* true globals */
ZEND_API zend_fcall_info_cache empty_fcall_info_cache = { 0, NULL, NULL, NULL };
#ifdef ZEND_WIN32
#include <process.h>
static WNDCLASS wc;
static HWND timeout_window;
static HANDLE timeout_thread_event;
static DWORD timeout_thread_id;
static int timeout_thread_initialized=0;
#endif
#if ZEND_DEBUG
static void (*original_sigsegv_handler)(int);
static void zend_handle_sigsegv(int dummy)
{
fflush(stdout);
fflush(stderr);
if (original_sigsegv_handler==zend_handle_sigsegv) {
signal(SIGSEGV, original_sigsegv_handler);
} else {
signal(SIGSEGV, SIG_DFL);
}
{
TSRMLS_FETCH();
fprintf(stderr, "SIGSEGV caught on opcode %d on opline %d of %s() at %s:%d\n\n",
active_opline->opcode,
active_opline-EG(active_op_array)->opcodes,
get_active_function_name(TSRMLS_C),
zend_get_executed_filename(TSRMLS_C),
zend_get_executed_lineno(TSRMLS_C));
}
if (original_sigsegv_handler!=zend_handle_sigsegv) {
original_sigsegv_handler(dummy);
}
}
#endif
static void zend_extension_activator(zend_extension *extension TSRMLS_DC)
{
if (extension->activate) {
extension->activate();
}
}
static void zend_extension_deactivator(zend_extension *extension TSRMLS_DC)
{
if (extension->deactivate) {
extension->deactivate();
}
}
static int is_not_internal_function(zend_function *function TSRMLS_DC)
{
if (function->type == ZEND_INTERNAL_FUNCTION) {
return EG(full_tables_cleanup) ? 0 : ZEND_HASH_APPLY_STOP;
} else {
return EG(full_tables_cleanup) ? 1 : ZEND_HASH_APPLY_REMOVE;
}
}
static int is_not_internal_class(zend_class_entry **ce TSRMLS_DC)
{
if ((*ce)->type == ZEND_INTERNAL_CLASS) {
return EG(full_tables_cleanup) ? 0 : ZEND_HASH_APPLY_STOP;
} else {
return EG(full_tables_cleanup) ? 1 : ZEND_HASH_APPLY_REMOVE;
}
}
void init_executor(TSRMLS_D)
{
INIT_ZVAL(EG(uninitialized_zval));
/* trick to make uninitialized_zval never be modified, passed by ref, etc. */
EG(uninitialized_zval).refcount++;
INIT_ZVAL(EG(error_zval));
EG(uninitialized_zval_ptr)=&EG(uninitialized_zval);
EG(error_zval_ptr)=&EG(error_zval);
zend_ptr_stack_init(&EG(arg_types_stack));
/* destroys stack frame, therefore makes core dumps worthless */
#if 0&&ZEND_DEBUG
original_sigsegv_handler = signal(SIGSEGV, zend_handle_sigsegv);
#endif
EG(return_value_ptr_ptr) = NULL;
EG(symtable_cache_ptr) = EG(symtable_cache)-1;
EG(symtable_cache_limit)=EG(symtable_cache)+SYMTABLE_CACHE_SIZE-1;
EG(no_extensions)=0;
EG(function_table) = CG(function_table);
EG(class_table) = CG(class_table);
EG(in_execution) = 0;
EG(in_autoload) = 0;
zend_ptr_stack_init(&EG(argument_stack));
zend_ptr_stack_push(&EG(argument_stack), (void *) NULL);
zend_hash_init(&EG(symbol_table), 50, NULL, ZVAL_PTR_DTOR, 0);
{
zval *globals;
ALLOC_ZVAL(globals);
globals->refcount=1;
globals->is_ref=1;
globals->type = IS_ARRAY;
globals->value.ht = &EG(symbol_table);
zend_hash_update(&EG(symbol_table), "GLOBALS", sizeof("GLOBALS"), &globals, sizeof(zval *), NULL);
}
EG(active_symbol_table) = &EG(symbol_table);
zend_llist_apply(&zend_extensions, (llist_apply_func_t) zend_extension_activator TSRMLS_CC);
EG(opline_ptr) = NULL;
EG(garbage_ptr) = 0;
zend_hash_init(&EG(included_files), 5, NULL, NULL, 0);
EG(ticks_count) = 0;
EG(user_error_handler) = NULL;
EG(current_execute_data) = NULL;
zend_stack_init(&EG(user_error_handlers_error_reporting));
zend_ptr_stack_init(&EG(user_error_handlers));
zend_ptr_stack_init(&EG(user_exception_handlers));
zend_objects_store_init(&EG(objects_store), 1024);
EG(full_tables_cleanup) = 0;
#ifdef ZEND_WIN32
EG(timed_out) = 0;
#endif
EG(exception) = NULL;
EG(scope) = NULL;
EG(This) = NULL;
EG(float_separator)[0] = '.';
}
void shutdown_executor(TSRMLS_D)
{
zend_try {
/* Removed because this can not be safely done, e.g. in this situation:
Object 1 creates object 2
Object 3 holds reference to object 2.
Now when 1 and 2 are destroyed, 3 can still access 2 in its destructor, with
very problematic results */
/* zend_objects_store_call_destructors(&EG(objects_store) TSRMLS_CC); */
/* Moved after symbol table cleaners, because some of the cleaners can call
destructors, which would use EG(symtable_cache_ptr) and thus leave leaks */
/* while (EG(symtable_cache_ptr)>=EG(symtable_cache)) {
zend_hash_destroy(*EG(symtable_cache_ptr));
efree(*EG(symtable_cache_ptr));
EG(symtable_cache_ptr)--;
}
*/
zend_llist_apply(&zend_extensions, (llist_apply_func_t) zend_extension_deactivator TSRMLS_CC);
zend_objects_store_call_destructors(&EG(objects_store) TSRMLS_CC);
zend_hash_graceful_reverse_destroy(&EG(symbol_table));
} zend_end_try();
zend_try {
zval *zeh;
/* remove error handlers before destroying classes and functions,
so that if handler used some class, crash would not happen */
if (EG(user_error_handler)) {
zeh = EG(user_error_handler);
EG(user_error_handler) = NULL;
zval_dtor(zeh);
FREE_ZVAL(zeh);
}
if (EG(user_exception_handler)) {
zeh = EG(user_exception_handler);
EG(user_exception_handler) = NULL;
zval_dtor(zeh);
FREE_ZVAL(zeh);
}
zend_stack_destroy(&EG(user_error_handlers_error_reporting));
zend_stack_init(&EG(user_error_handlers_error_reporting));
zend_ptr_stack_clean(&EG(user_error_handlers), ZVAL_DESTRUCTOR, 1);
zend_ptr_stack_clean(&EG(user_exception_handlers), ZVAL_DESTRUCTOR, 1);
} zend_end_try();
zend_try {
/* Cleanup static data for functions and arrays.
We need a separate cleanup stage because of the following problem:
Suppose we destroy class X, which destroys the class's function table,
and in the function table we have function foo() that has static $bar.
Now if an object of class X is assigned to $bar, its destructor will be
called and will fail since X's function table is in mid-destruction.
So we want first of all to clean up all data and then move to tables destruction.
Note that only run-time accessed data need to be cleaned up, pre-defined data can
not contain objects and thus are not probelmatic */
zend_hash_apply(EG(function_table), (apply_func_t) zend_cleanup_function_data TSRMLS_CC);
zend_hash_apply(EG(class_table), (apply_func_t) zend_cleanup_class_data TSRMLS_CC);
while (EG(garbage_ptr)) {
if (EG(garbage)[--EG(garbage_ptr)]->refcount==1) {
zval_ptr_dtor(&EG(garbage)[EG(garbage_ptr)]);
}
}
zend_ptr_stack_destroy(&EG(argument_stack));
/* Destroy all op arrays */
if (EG(full_tables_cleanup)) {
zend_hash_apply(EG(function_table), (apply_func_t) is_not_internal_function TSRMLS_CC);
zend_hash_apply(EG(class_table), (apply_func_t) is_not_internal_class TSRMLS_CC);
} else {
zend_hash_reverse_apply(EG(function_table), (apply_func_t) is_not_internal_function TSRMLS_CC);
zend_hash_reverse_apply(EG(class_table), (apply_func_t) is_not_internal_class TSRMLS_CC);
}
while (EG(symtable_cache_ptr)>=EG(symtable_cache)) {
zend_hash_destroy(*EG(symtable_cache_ptr));
FREE_HASHTABLE(*EG(symtable_cache_ptr));
EG(symtable_cache_ptr)--;
}
zend_objects_store_free_object_storage(&EG(objects_store) TSRMLS_CC);
} zend_end_try();
zend_try {
clean_non_persistent_constants(TSRMLS_C);
} zend_end_try();
/* The regular list must be destroyed after the main symbol table,
* op arrays, and constants are destroyed.
*/
zend_destroy_rsrc_list(&EG(regular_list) TSRMLS_CC);
zend_try {
#if ZEND_DEBUG
signal(SIGSEGV, original_sigsegv_handler);
#endif
zend_hash_destroy(&EG(included_files));
zend_ptr_stack_destroy(&EG(arg_types_stack));
zend_stack_destroy(&EG(user_error_handlers_error_reporting));
zend_ptr_stack_destroy(&EG(user_error_handlers));
zend_ptr_stack_destroy(&EG(user_exception_handlers));
zend_objects_store_destroy(&EG(objects_store));
} zend_end_try();
}
ZEND_API char *get_active_function_name(TSRMLS_D)
{
if (!zend_is_executing(TSRMLS_C)) {
return NULL;
}
switch (EG(function_state_ptr)->function->type) {
case ZEND_USER_FUNCTION: {
char *function_name = ((zend_op_array *) EG(function_state_ptr)->function)->function_name;
if (function_name) {
return function_name;
} else {
return "main";
}
}
break;
case ZEND_INTERNAL_FUNCTION:
return ((zend_internal_function *) EG(function_state_ptr)->function)->function_name;
break;
default:
return NULL;
}
}
ZEND_API char *zend_get_executed_filename(TSRMLS_D)
{
if (EG(active_op_array)) {
return EG(active_op_array)->filename;
} else {
return "[no active file]";
}
}
ZEND_API uint zend_get_executed_lineno(TSRMLS_D)
{
if (EG(opline_ptr)) {
return active_opline->lineno;
} else {
return 0;
}
}
ZEND_API zend_bool zend_is_executing(TSRMLS_D)
{
return EG(in_execution);
}
ZEND_API void _zval_ptr_dtor(zval **zval_ptr ZEND_FILE_LINE_DC)
{
#if DEBUG_ZEND>=2
printf("Reducing refcount for %x (%x): %d->%d\n", *zval_ptr, zval_ptr, (*zval_ptr)->refcount, (*zval_ptr)->refcount-1);
#endif
(*zval_ptr)->refcount--;
if ((*zval_ptr)->refcount==0) {
zval_dtor(*zval_ptr);
safe_free_zval_ptr_rel(*zval_ptr ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC);
} else if ((*zval_ptr)->refcount == 1) {
(*zval_ptr)->is_ref = 0;
}
}
ZEND_API void _zval_internal_ptr_dtor(zval **zval_ptr ZEND_FILE_LINE_DC)
{
#if DEBUG_ZEND>=2
printf("Reducing refcount for %x (%x): %d->%d\n", *zval_ptr, zval_ptr, (*zval_ptr)->refcount, (*zval_ptr)->refcount-1);
#endif
(*zval_ptr)->refcount--;
if ((*zval_ptr)->refcount==0) {
zval_internal_dtor(*zval_ptr);
free(*zval_ptr);
} else if ((*zval_ptr)->refcount == 1) {
(*zval_ptr)->is_ref = 0;
}
}
ZEND_API int zend_is_true(zval *op)
{
return i_zend_is_true(op);
}
#include "../TSRM/tsrm_strtok_r.h"
ZEND_API int zval_update_constant(zval **pp, void *arg TSRMLS_DC)
{
zval *p = *pp;
zend_bool inline_change = (zend_bool) (unsigned long) arg;
zval const_value;
if (p->type == IS_CONSTANT) {
int refcount;
SEPARATE_ZVAL(pp);
p = *pp;
refcount = p->refcount;
if (!zend_get_constant(p->value.str.val, p->value.str.len, &const_value TSRMLS_CC)) {
zend_error(E_NOTICE, "Use of undefined constant %s - assumed '%s'",
p->value.str.val,
p->value.str.val);
p->type = IS_STRING;
if (!inline_change) {
zval_copy_ctor(p);
}
} else {
if (inline_change) {
STR_FREE(p->value.str.val);
}
*p = const_value;
}
INIT_PZVAL(p);
p->refcount = refcount;
} else if (p->type == IS_CONSTANT_ARRAY) {
zval **element, *new_val;
char *str_index;
uint str_index_len;
ulong num_index;
SEPARATE_ZVAL(pp);
p = *pp;
p->type = IS_ARRAY;
/* First go over the array and see if there are any constant indices */
zend_hash_internal_pointer_reset(p->value.ht);
while (zend_hash_get_current_data(p->value.ht, (void **) &element)==SUCCESS) {
if (!(Z_TYPE_PP(element) & IS_CONSTANT_INDEX)) {
zend_hash_move_forward(p->value.ht);
continue;
}
Z_TYPE_PP(element) &= ~IS_CONSTANT_INDEX;
if (zend_hash_get_current_key_ex(p->value.ht, &str_index, &str_index_len, &num_index, 0, NULL)!=HASH_KEY_IS_STRING) {
zend_hash_move_forward(p->value.ht);
continue;
}
if (!zend_get_constant(str_index, str_index_len-1, &const_value TSRMLS_CC)) {
zend_error(E_NOTICE, "Use of undefined constant %s - assumed '%s'", str_index, str_index);
zend_hash_move_forward(p->value.ht);
continue;
}
if (const_value.type == IS_STRING && const_value.value.str.len == str_index_len-1 &&
!strncmp(const_value.value.str.val, str_index, str_index_len)) {
/* constant value is the same as its name */
zval_dtor(&const_value);
zend_hash_move_forward(p->value.ht);
continue;
}
ALLOC_ZVAL(new_val);
*new_val = **element;
zval_copy_ctor(new_val);
new_val->refcount = 1;
new_val->is_ref = 0;
/* preserve this bit for inheritance */
Z_TYPE_PP(element) |= IS_CONSTANT_INDEX;
switch (const_value.type) {
case IS_STRING:
zend_symtable_update(p->value.ht, const_value.value.str.val, const_value.value.str.len+1, &new_val, sizeof(zval *), NULL);
break;
case IS_LONG:
zend_hash_index_update(p->value.ht, const_value.value.lval, &new_val, sizeof(zval *), NULL);
break;
}
zend_hash_del(p->value.ht, str_index, str_index_len);
zval_dtor(&const_value);
}
zend_hash_apply_with_argument(p->value.ht, (apply_func_arg_t) zval_update_constant, (void *) 1 TSRMLS_CC);
zend_hash_internal_pointer_reset(p->value.ht);
}
return 0;
}
int call_user_function(HashTable *function_table, zval **object_pp, zval *function_name, zval *retval_ptr, zend_uint param_count, zval *params[] TSRMLS_DC)
{
zval ***params_array = (zval ***) emalloc(sizeof(zval **)*param_count);
zend_uint i;
int ex_retval;
zval *local_retval_ptr;
for (i=0; i<param_count; i++) {
params_array[i] = &params[i];
}
ex_retval = call_user_function_ex(function_table, object_pp, function_name, &local_retval_ptr, param_count, params_array, 1, NULL TSRMLS_CC);
if (local_retval_ptr) {
COPY_PZVAL_TO_ZVAL(*retval_ptr, local_retval_ptr);
} else {
INIT_ZVAL(*retval_ptr);
}
efree(params_array);
return ex_retval;
}
int call_user_function_ex(HashTable *function_table, zval **object_pp, zval *function_name, zval **retval_ptr_ptr, zend_uint param_count, zval **params[], int no_separation, HashTable *symbol_table TSRMLS_DC)
{
zend_fcall_info fci;
fci.size = sizeof(fci);
fci.function_table = function_table;
fci.object_pp = object_pp;
fci.function_name = function_name;
fci.retval_ptr_ptr = retval_ptr_ptr;
fci.param_count = param_count;
fci.params = params;
fci.no_separation = (zend_bool) no_separation;
fci.symbol_table = symbol_table;
return zend_call_function(&fci, NULL TSRMLS_CC);
}
int zend_call_function(zend_fcall_info *fci, zend_fcall_info_cache *fci_cache TSRMLS_DC)
{
zend_uint i;
zval **original_return_value;
HashTable *calling_symbol_table;
zend_function_state *original_function_state_ptr;
zend_op_array *original_op_array;
zend_op **original_opline_ptr;
zval *orig_free_op1, *orig_free_op2;
int (*orig_unary_op)(zval *result, zval *op1);
int (*orig_binary_op)(zval *result, zval *op1, zval *op2 TSRMLS_DC);
zend_class_entry *current_scope;
zend_class_entry *calling_scope = NULL;
char *function_name_lc;
zval *current_this;
zend_execute_data execute_data;
zval *method_name;
zval *params_array;
int call_via_handler = 0;
switch (fci->size) {
case sizeof(zend_fcall_info):
break; /* nothing to do currently */
default:
zend_error(E_ERROR, "Corrupted fcall_info provided to zend_call_function()");
break;
}
/* Initialize execute_data */
if (EG(current_execute_data)) {
execute_data = *EG(current_execute_data);
} else {
/* This only happens when we're called outside any execute()'s
* It shouldn't be strictly necessary to NULL execute_data out,
* but it may make bugs easier to spot
*/
memset(&execute_data, 0, sizeof(zend_execute_data));
}
/* we may return SUCCESS, and yet retval may be uninitialized,
* if there was an exception...
*/
*fci->retval_ptr_ptr = NULL;
if (!fci_cache || !fci_cache->initialized) {
if (fci->function_name->type==IS_ARRAY) { /* assume array($obj, $name) couple */
zval **tmp_object_ptr, **tmp_real_function_name;
if (zend_hash_index_find(fci->function_name->value.ht, 0, (void **) &tmp_object_ptr)==FAILURE) {
return FAILURE;
}
if (zend_hash_index_find(fci->function_name->value.ht, 1, (void **) &tmp_real_function_name)==FAILURE) {
return FAILURE;
}
fci->function_name = *tmp_real_function_name;
SEPARATE_ZVAL_IF_NOT_REF(tmp_object_ptr);
fci->object_pp = tmp_object_ptr;
(*fci->object_pp)->is_ref = 1;
}
if (fci->object_pp && !*fci->object_pp) {
fci->object_pp = NULL;
}
if (fci->object_pp) {
/* TBI!! new object handlers */
if (Z_TYPE_PP(fci->object_pp) == IS_OBJECT) {
if (!IS_ZEND_STD_OBJECT(**fci->object_pp)) {
zend_error(E_WARNING, "Cannot use call_user_function on objects without a class entry");
return FAILURE;
}
calling_scope = Z_OBJCE_PP(fci->object_pp);
fci->function_table = &calling_scope->function_table;
EX(object) = *fci->object_pp;
} else if (Z_TYPE_PP(fci->object_pp) == IS_STRING) {
zend_class_entry **ce;
int found = FAILURE;
if (EG(active_op_array) && strcmp(Z_STRVAL_PP(fci->object_pp), "self") == 0) {
ce = &(EG(active_op_array)->scope);
found = (*ce != NULL?SUCCESS:FAILURE);
} else if (strcmp(Z_STRVAL_PP(fci->object_pp), "parent") == 0 && EG(active_op_array) && EG(active_op_array)->scope) {
ce = &(EG(active_op_array)->scope->parent);
found = (*ce != NULL?SUCCESS:FAILURE);
} else {
found = zend_lookup_class(Z_STRVAL_PP(fci->object_pp), Z_STRLEN_PP(fci->object_pp), &ce TSRMLS_CC);
}
if (found == FAILURE)
return FAILURE;
fci->function_table = &(*ce)->function_table;
calling_scope = *ce;
fci->object_pp = NULL;
}
if (fci->function_table == NULL) {
return FAILURE;
}
}
if (fci->function_name->type!=IS_STRING) {
return FAILURE;
}
function_name_lc = zend_str_tolower_dup(fci->function_name->value.str.val, fci->function_name->value.str.len);
if (zend_hash_find(fci->function_table, function_name_lc, fci->function_name->value.str.len+1, (void **) &EX(function_state).function)==FAILURE) {
/* try calling __call */
if (calling_scope && calling_scope->__call) {
EX(function_state).function = calling_scope->__call;
/* prepare params */
ALLOC_INIT_ZVAL(method_name);
ZVAL_STRINGL(method_name, function_name_lc, fci->function_name->value.str.len, 0);
ALLOC_INIT_ZVAL(params_array);
array_init(params_array);
call_via_handler = 1;
} else {
efree(function_name_lc);
return FAILURE;
}
} else {
efree(function_name_lc);
}
if (fci_cache) {
fci_cache->function_handler = EX(function_state).function;
fci_cache->object_pp = fci->object_pp;
fci_cache->calling_scope = calling_scope;
fci_cache->initialized = 1;
}
} else {
EX(function_state).function = fci_cache->function_handler;
calling_scope = fci_cache->calling_scope;
fci->object_pp = fci_cache->object_pp;
}
for (i=0; i<fci->param_count; i++) {
zval *param;
if (ARG_SHOULD_BE_SENT_BY_REF(EX(function_state).function, i+1)
&& !PZVAL_IS_REF(*fci->params[i])) {
if ((*fci->params[i])->refcount>1) {
zval *new_zval;
if (fci->no_separation) {
return FAILURE;
}
ALLOC_ZVAL(new_zval);
*new_zval = **fci->params[i];
zval_copy_ctor(new_zval);
new_zval->refcount = 1;
(*fci->params[i])->refcount--;
*fci->params[i] = new_zval;
}
(*fci->params[i])->refcount++;
(*fci->params[i])->is_ref = 1;
param = *fci->params[i];
} else if (*fci->params[i] != &EG(uninitialized_zval)) {
(*fci->params[i])->refcount++;
param = *fci->params[i];
} else {
ALLOC_ZVAL(param);
*param = **(fci->params[i]);
INIT_PZVAL(param);
}
if (call_via_handler) {
add_next_index_zval(params_array, param);
} else {
zend_ptr_stack_push(&EG(argument_stack), param);
}
}
if (call_via_handler) {
zend_ptr_stack_push(&EG(argument_stack), method_name);
zend_ptr_stack_push(&EG(argument_stack), params_array);
fci->param_count = 2;
}
zend_ptr_stack_n_push(&EG(argument_stack), 2, (void *) (long) fci->param_count, NULL);
original_function_state_ptr = EG(function_state_ptr);
EG(function_state_ptr) = &EX(function_state);
current_scope = EG(scope);
EG(scope) = calling_scope;
current_this = EG(This);
if (fci->object_pp) {
EG(This) = *fci->object_pp;
if (!PZVAL_IS_REF(EG(This))) {
EG(This)->refcount++; /* For $this pointer */
} else {
zval *this_ptr;
ALLOC_ZVAL(this_ptr);
*this_ptr = *EG(This);
INIT_PZVAL(this_ptr);
zval_copy_ctor(this_ptr);
EG(This) = this_ptr;
}
} else {
EG(This) = NULL;
if (calling_scope && !(EX(function_state).function->common.fn_flags & ZEND_ACC_STATIC)) {
int severity;
if (EX(function_state).function->common.fn_flags & ZEND_ACC_ALLOW_STATIC) {
severity = E_STRICT;
} else {
severity = E_ERROR;
}
zend_error(E_STRICT, "Non-static method %s::%s() cannot be called statically", calling_scope->name, EX(function_state).function->common.function_name);
}
}
EX(prev_execute_data) = EG(current_execute_data);
EG(current_execute_data) = &execute_data;
if (EX(function_state).function->type == ZEND_USER_FUNCTION) {
calling_symbol_table = EG(active_symbol_table);
EG(scope) = EX(function_state).function->common.scope;
if (fci->symbol_table) {
EG(active_symbol_table) = fci->symbol_table;
} else {
ALLOC_HASHTABLE(EG(active_symbol_table));
zend_hash_init(EG(active_symbol_table), 0, NULL, ZVAL_PTR_DTOR, 0);
}
original_return_value = EG(return_value_ptr_ptr);
original_op_array = EG(active_op_array);
EG(return_value_ptr_ptr) = fci->retval_ptr_ptr;
EG(active_op_array) = (zend_op_array *) EX(function_state).function;
original_opline_ptr = EG(opline_ptr);
orig_free_op1 = EG(free_op1);
orig_free_op2 = EG(free_op2);
orig_unary_op = EG(unary_op);
orig_binary_op = EG(binary_op);
zend_execute(EG(active_op_array) TSRMLS_CC);
if (!fci->symbol_table) {
zend_hash_destroy(EG(active_symbol_table));
FREE_HASHTABLE(EG(active_symbol_table));
}
EG(active_symbol_table) = calling_symbol_table;
EG(active_op_array) = original_op_array;
EG(return_value_ptr_ptr)=original_return_value;
EG(opline_ptr) = original_opline_ptr;
EG(free_op1) = orig_free_op1;
EG(free_op2) = orig_free_op2;
EG(unary_op) = orig_unary_op;
EG(binary_op) = orig_binary_op;
} else {
ALLOC_INIT_ZVAL(*fci->retval_ptr_ptr);
if (EX(function_state).function->common.scope) {
EG(scope) = EX(function_state).function->common.scope;
}
((zend_internal_function *) EX(function_state).function)->handler(fci->param_count, *fci->retval_ptr_ptr, (fci->object_pp?*fci->object_pp:NULL), 1 TSRMLS_CC);
INIT_PZVAL(*fci->retval_ptr_ptr);
}
zend_ptr_stack_clear_multiple(TSRMLS_C);
if (call_via_handler) {
zval_ptr_dtor(&method_name);
zval_ptr_dtor(&params_array);
}
EG(function_state_ptr) = original_function_state_ptr;
if (EG(This)) {
zval_ptr_dtor(&EG(This));
}
EG(scope) = current_scope;
EG(This) = current_this;
EG(current_execute_data) = EX(prev_execute_data);
if (EG(exception)) {
zend_throw_exception_internal(NULL TSRMLS_CC);
}
return SUCCESS;
}
ZEND_API int zend_lookup_class(char *name, int name_length, zend_class_entry ***ce TSRMLS_DC)
{
zval **args[1];
zval autoload_function;
zval class_name, *class_name_ptr = &class_name;
zval *retval_ptr;
int retval;
char *lc_name;
zval *exception;
lc_name = do_alloca(name_length + 1);
zend_str_tolower_copy(lc_name, name, name_length);
if (zend_hash_find(EG(class_table), lc_name, name_length+1, (void **) ce) == SUCCESS) {
free_alloca(lc_name);
return SUCCESS;
}
if (EG(in_autoload)) {
free_alloca(lc_name);
return FAILURE;
}
EG(in_autoload) = 1;
ZVAL_STRINGL(&autoload_function, "__autoload", sizeof("__autoload")-1, 0);
INIT_PZVAL(class_name_ptr);
ZVAL_STRINGL(class_name_ptr, name, name_length, 0);
args[0] = &class_name_ptr;
exception = EG(exception);
EG(exception) = NULL;
retval = call_user_function_ex(EG(function_table), NULL, &autoload_function, &retval_ptr, 1, args, 0, NULL TSRMLS_CC);
EG(in_autoload) = 0;
if (retval == FAILURE) {
EG(exception) = exception;
free_alloca(lc_name);
return FAILURE;
}
if (EG(exception)) {
free_alloca(lc_name);
zend_error(E_ERROR, "__autoload(%s) threw an exception of type '%s'", name, Z_OBJCE_P(EG(exception))->name);
return FAILURE;
}
EG(exception) = exception;
/* If an exception is thrown retval_ptr will be NULL but we bailout before we reach this point */
zval_ptr_dtor(&retval_ptr);
retval = zend_hash_find(EG(class_table), lc_name, name_length + 1, (void **) ce);
free_alloca(lc_name);
return retval;
}
ZEND_API int zend_eval_string(char *str, zval *retval_ptr, char *string_name TSRMLS_DC)
{
zval pv;
zend_op_array *new_op_array;
zend_op_array *original_active_op_array = EG(active_op_array);
zend_function_state *original_function_state_ptr = EG(function_state_ptr);
zend_uchar original_handle_op_arrays;
int retval;
if (retval_ptr) {
pv.value.str.len = strlen(str)+sizeof("return ;")-1;
pv.value.str.val = emalloc(pv.value.str.len+1);
strcpy(pv.value.str.val, "return ");
strcat(pv.value.str.val, str);
strcat(pv.value.str.val, " ;");
} else {
pv.value.str.len = strlen(str);
pv.value.str.val = estrndup(str, pv.value.str.len);
}
pv.type = IS_STRING;
/*printf("Evaluating '%s'\n", pv.value.str.val);*/
original_handle_op_arrays = CG(handle_op_arrays);
CG(handle_op_arrays) = 0;
new_op_array = compile_string(&pv, string_name TSRMLS_CC);
CG(handle_op_arrays) = original_handle_op_arrays;
if (new_op_array) {
zval *local_retval_ptr=NULL;
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 TSRMLS_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 TSRMLS_CC);
efree(new_op_array);
EG(return_value_ptr_ptr) = original_return_value_ptr_ptr;
retval = SUCCESS;
} else {
retval = FAILURE;
}
zval_dtor(&pv);
return retval;
}
ZEND_API int zend_eval_string_ex(char *str, zval *retval_ptr, char *string_name, int handle_exceptions TSRMLS_DC)
{
int result;
zval *exception = EG(exception);
if (handle_exceptions) {
EG(exception) = NULL;
}
result = zend_eval_string(str, retval_ptr, string_name TSRMLS_CC);
if (handle_exceptions && EG(exception)) {
zend_exception_error(EG(exception) TSRMLS_CC);
zval_ptr_dtor(&EG(exception));
EG(exception) = exception;
result = FAILURE;
}
return result;
}
void execute_new_code(TSRMLS_D)
{
zend_op *opline, *end;
zend_op *ret_opline;
zval *local_retval=NULL;
if (!CG(interactive)
|| CG(active_op_array)->backpatch_count>0
|| CG(active_op_array)->function_name
|| CG(active_op_array)->type!=ZEND_USER_FUNCTION) {
return;
}
ret_opline = get_next_op(CG(active_op_array) TSRMLS_CC);
ret_opline->opcode = ZEND_RETURN;
ret_opline->op1.op_type = IS_CONST;
INIT_ZVAL(ret_opline->op1.u.constant);
SET_UNUSED(ret_opline->op2);
if (!CG(active_op_array)->start_op) {
CG(active_op_array)->start_op = CG(active_op_array)->opcodes;
}
opline=CG(active_op_array)->start_op;
end=CG(active_op_array)->opcodes+CG(active_op_array)->last;
while (opline<end) {
if (opline->op1.op_type==IS_CONST) {
opline->op1.u.constant.is_ref = 1;
opline->op1.u.constant.refcount = 2; /* Make sure is_ref won't be reset */
}
if (opline->op2.op_type==IS_CONST) {
opline->op2.u.constant.is_ref = 1;
opline->op2.u.constant.refcount = 2;
}
opline->handler = zend_opcode_handlers[opline->opcode];
opline++;
}
EG(return_value_ptr_ptr) = &local_retval;
EG(active_op_array) = CG(active_op_array);
zend_execute(CG(active_op_array) TSRMLS_CC);
if (local_retval) {
zval_ptr_dtor(&local_retval);
}
CG(active_op_array)->last--; /* get rid of that ZEND_RETURN */
CG(active_op_array)->start_op = CG(active_op_array)->opcodes+CG(active_op_array)->last;
}
ZEND_API void zend_timeout(int dummy)
{
TSRMLS_FETCH();
if (zend_on_timeout) {
zend_on_timeout(EG(timeout_seconds) TSRMLS_CC);
}
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 {
void ***tsrm_ls;
SetTimer(timeout_window, wParam, lParam*1000, NULL);
tsrm_ls = ts_resource_ex(0, &wParam);
if (!tsrm_ls) {
/* shouldn't normally happen */
break;
}
EG(timed_out) = 0;
}
break;
case WM_UNREGISTER_ZEND_TIMEOUT:
/* wParam is the thread id pointer */
KillTimer(timeout_window, wParam);
break;
case WM_TIMER: {
#ifdef ZTS
void ***tsrm_ls;
tsrm_ls = ts_resource_ex(0, &wParam);
if (!tsrm_ls) {
/* 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)
{
TSRMLS_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(TSRMLS_D)
{
#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
}
zend_class_entry *zend_fetch_class(char *class_name, uint class_name_len, int fetch_type TSRMLS_DC)
{
zend_class_entry **pce;
zend_bool in_autoload;
check_fetch_type:
switch (fetch_type) {
case ZEND_FETCH_CLASS_SELF:
if (!EG(scope)) {
zend_error(E_ERROR, "Cannot access self:: when no class scope is active");
}
return EG(scope);
case ZEND_FETCH_CLASS_PARENT:
if (!EG(scope)) {
zend_error(E_ERROR, "Cannot access parent:: when no class scope is active");
}
if (!EG(scope)->parent) {
zend_error(E_ERROR, "Cannot access parent:: when current class scope has no parent");
}
return EG(scope)->parent;
case ZEND_FETCH_CLASS_AUTO: {
fetch_type = zend_get_class_fetch_type(class_name, class_name_len);
if (fetch_type!=ZEND_FETCH_CLASS_DEFAULT) {
goto check_fetch_type;
}
}
break;
}
in_autoload = EG(in_autoload);
EG(in_autoload) = 0;
if (zend_lookup_class(class_name, class_name_len, &pce TSRMLS_CC)==FAILURE) {
EG(in_autoload) = in_autoload;
zend_error(E_ERROR, "Class '%s' not found", class_name);
}
EG(in_autoload) = in_autoload;
return *pce;
}
#define MAX_ABSTRACT_INFO_CNT 3
#define MAX_ABSTRACT_INFO_FMT "%s%s%s%s"
#define DISPLAY_ABSTRACT_FN(idx) \
ai.afn[idx] ? ZEND_FN_SCOPE_NAME(ai.afn[idx]) : "", \
ai.afn[idx] ? "::" : "", \
ai.afn[idx] ? ai.afn[idx]->common.function_name : "", \
ai.afn[idx] && ai.afn[idx+1] ? ", " : (ai.afn[idx] && ai.cnt >= MAX_ABSTRACT_INFO_CNT ? ", ..." : "")
typedef struct _zend_abstract_info {
zend_function *afn[MAX_ABSTRACT_INFO_CNT+1];
int cnt;
} zend_abstract_info;
static int zend_verify_abstract_class_function(zend_function *fn, zend_abstract_info *ai TSRMLS_DC)
{
if (fn->common.fn_flags & ZEND_ACC_ABSTRACT) {
if (ai->cnt < MAX_ABSTRACT_INFO_CNT) {
ai->afn[ai->cnt] = fn;
}
ai->cnt++;
}
return 0;
}
void zend_verify_abstract_class(zend_class_entry *ce TSRMLS_DC)
{
zend_abstract_info ai;
if ((ce->ce_flags & ZEND_ACC_ABSTRACT) && !(ce->ce_flags & ZEND_ACC_ABSTRACT_CLASS)) {
memset(&ai, 0, sizeof(ai));
zend_hash_apply_with_argument(&ce->function_table, (apply_func_arg_t) zend_verify_abstract_class_function, &ai TSRMLS_CC);
zend_error(E_ERROR, "Class %s contains %d abstract methods and must therefore be declared abstract (" MAX_ABSTRACT_INFO_FMT MAX_ABSTRACT_INFO_FMT MAX_ABSTRACT_INFO_FMT ")",
ce->name, ai.cnt,
DISPLAY_ABSTRACT_FN(0),
DISPLAY_ABSTRACT_FN(1),
DISPLAY_ABSTRACT_FN(2)
);
}
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
*/
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