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php-src/Zend/zend_objects.c
Dmitry Stogov 6499162ff0 - get rid of EG(scope). zend_get_executed_scope() should be used instead. 
- ichanged zval_update_constant_ex(). Use IS_TYPE_IMMUTABLE flag on shared constants and AST, instead of "inline_change" parameter.
2016-04-28 04:13:34 +03:00

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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2016 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> |
| Dmitry Stogov <dmitry@zend.com> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include "zend.h"
#include "zend_globals.h"
#include "zend_variables.h"
#include "zend_API.h"
#include "zend_interfaces.h"
#include "zend_exceptions.h"
ZEND_API void zend_object_std_init(zend_object *object, zend_class_entry *ce)
{
zval *p, *end;
GC_REFCOUNT(object) = 1;
GC_TYPE_INFO(object) = IS_OBJECT;
object->ce = ce;
object->properties = NULL;
zend_objects_store_put(object);
p = object->properties_table;
if (EXPECTED(ce->default_properties_count != 0)) {
end = p + ce->default_properties_count;
do {
ZVAL_UNDEF(p);
p++;
} while (p != end);
}
if (UNEXPECTED(ce->ce_flags & ZEND_ACC_USE_GUARDS)) {
GC_FLAGS(object) |= IS_OBJ_USE_GUARDS;
ZVAL_UNDEF(p);
}
}
ZEND_API void zend_object_std_dtor(zend_object *object)
{
zval *p, *end;
if (object->properties) {
if (EXPECTED(!(GC_FLAGS(object->properties) & IS_ARRAY_IMMUTABLE))) {
if (EXPECTED(--GC_REFCOUNT(object->properties) == 0)) {
zend_array_destroy(object->properties);
}
}
}
p = object->properties_table;
if (EXPECTED(object->ce->default_properties_count)) {
end = p + object->ce->default_properties_count;
do {
i_zval_ptr_dtor(p ZEND_FILE_LINE_CC);
p++;
} while (p != end);
}
if (UNEXPECTED(GC_FLAGS(object) & IS_OBJ_HAS_GUARDS)) {
if (EXPECTED(Z_TYPE_P(p) == IS_STRING)) {
zend_string_release(Z_STR_P(p));
} else {
HashTable *guards;
ZEND_ASSERT(Z_TYPE_P(p) == IS_ARRAY);
guards = Z_ARRVAL_P(p);
ZEND_ASSERT(guards != NULL);
zend_hash_destroy(guards);
FREE_HASHTABLE(guards);
}
}
}
ZEND_API void zend_objects_destroy_object(zend_object *object)
{
zend_function *destructor = object ? object->ce->destructor : NULL;
if (destructor) {
zend_object *old_exception;
zval obj;
if (destructor->op_array.fn_flags & (ZEND_ACC_PRIVATE|ZEND_ACC_PROTECTED)) {
if (destructor->op_array.fn_flags & ZEND_ACC_PRIVATE) {
/* Ensure that if we're calling a private function, we're allowed to do so.
*/
if (EG(current_execute_data)) {
zend_class_entry *scope = zend_get_executed_scope();
if (object->ce != scope) {
zend_throw_error(NULL,
"Call to private %s::__destruct() from context '%s'",
ZSTR_VAL(object->ce->name),
scope ? ZSTR_VAL(scope->name) : "");
return;
}
} else {
zend_error(E_WARNING,
"Call to private %s::__destruct() from context '' during shutdown ignored",
ZSTR_VAL(object->ce->name));
return;
}
} else {
/* Ensure that if we're calling a protected function, we're allowed to do so.
*/
if (EG(current_execute_data)) {
zend_class_entry *scope = zend_get_executed_scope();
if (!zend_check_protected(zend_get_function_root_class(destructor), scope)) {
zend_throw_error(NULL,
"Call to protected %s::__destruct() from context '%s'",
ZSTR_VAL(object->ce->name),
scope ? ZSTR_VAL(scope->name) : "");
return;
}
} else {
zend_error(E_WARNING,
"Call to protected %s::__destruct() from context '' during shutdown ignored",
ZSTR_VAL(object->ce->name));
return;
}
}
}
ZVAL_OBJ(&obj, object);
Z_ADDREF(obj);
/* Make sure that destructors are protected from previously thrown exceptions.
* For example, if an exception was thrown in a function and when the function's
* local variable destruction results in a destructor being called.
*/
old_exception = NULL;
if (EG(exception)) {
if (EG(exception) == object) {
zend_error_noreturn(E_CORE_ERROR, "Attempt to destruct pending exception");
} else {
old_exception = EG(exception);
EG(exception) = NULL;
}
}
zend_call_method_with_0_params(&obj, object->ce, &destructor, ZEND_DESTRUCTOR_FUNC_NAME, NULL);
if (old_exception) {
if (EG(exception)) {
zend_exception_set_previous(EG(exception), old_exception);
} else {
EG(exception) = old_exception;
}
}
zval_ptr_dtor(&obj);
}
}
ZEND_API zend_object *zend_objects_new(zend_class_entry *ce)
{
zend_object *object = emalloc(sizeof(zend_object) + zend_object_properties_size(ce));
zend_object_std_init(object, ce);
object->handlers = &std_object_handlers;
return object;
}
ZEND_API void zend_objects_clone_members(zend_object *new_object, zend_object *old_object)
{
if (old_object->ce->default_properties_count) {
zval *src = old_object->properties_table;
zval *dst = new_object->properties_table;
zval *end = src + old_object->ce->default_properties_count;
do {
i_zval_ptr_dtor(dst ZEND_FILE_LINE_CC);
ZVAL_COPY_VALUE(dst, src);
zval_add_ref(dst);
src++;
dst++;
} while (src != end);
} else if (old_object->properties && !old_object->ce->clone) {
/* fast copy */
if (EXPECTED(old_object->handlers == &std_object_handlers)) {
if (EXPECTED(!(GC_FLAGS(old_object->properties) & IS_ARRAY_IMMUTABLE))) {
GC_REFCOUNT(old_object->properties)++;
}
new_object->properties = old_object->properties;
return;
}
}
if (old_object->properties &&
EXPECTED(zend_hash_num_elements(old_object->properties))) {
zval *prop, new_prop;
zend_ulong num_key;
zend_string *key;
if (!new_object->properties) {
ALLOC_HASHTABLE(new_object->properties);
zend_hash_init(new_object->properties, zend_hash_num_elements(old_object->properties), NULL, ZVAL_PTR_DTOR, 0);
zend_hash_real_init(new_object->properties, 0);
} else {
zend_hash_extend(new_object->properties, new_object->properties->nNumUsed + zend_hash_num_elements(old_object->properties), 0);
}
new_object->properties->u.v.flags |=
old_object->properties->u.v.flags & HASH_FLAG_HAS_EMPTY_IND;
ZEND_HASH_FOREACH_KEY_VAL(old_object->properties, num_key, key, prop) {
if (Z_TYPE_P(prop) == IS_INDIRECT) {
ZVAL_INDIRECT(&new_prop, new_object->properties_table + (Z_INDIRECT_P(prop) - old_object->properties_table));
} else {
ZVAL_COPY_VALUE(&new_prop, prop);
zval_add_ref(&new_prop);
}
if (EXPECTED(key)) {
_zend_hash_append(new_object->properties, key, &new_prop);
} else {
zend_hash_index_add_new(new_object->properties, num_key, &new_prop);
}
} ZEND_HASH_FOREACH_END();
}
if (old_object->ce->clone) {
zval new_obj;
ZVAL_OBJ(&new_obj, new_object);
Z_ADDREF(new_obj);
zend_call_method_with_0_params(&new_obj, old_object->ce, &old_object->ce->clone, ZEND_CLONE_FUNC_NAME, NULL);
zval_ptr_dtor(&new_obj);
}
}
ZEND_API zend_object *zend_objects_clone_obj(zval *zobject)
{
zend_object *old_object;
zend_object *new_object;
/* assume that create isn't overwritten, so when clone depends on the
* overwritten one then it must itself be overwritten */
old_object = Z_OBJ_P(zobject);
new_object = zend_objects_new(old_object->ce);
zend_objects_clone_members(new_object, old_object);
return new_object;
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
*/
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