1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
|
/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 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@php.net> |
| Zeev Suraski <zeev@php.net> |
| Dmitry Stogov <dmitry@php.net> |
+----------------------------------------------------------------------+
*/
#include "zend.h"
#include "zend_globals.h"
#include "zend_variables.h"
#include "zend_API.h"
#include "zend_interfaces.h"
#include "zend_exceptions.h"
#include "zend_weakrefs.h"
static zend_always_inline void _zend_object_std_init(zend_object *object, zend_class_entry *ce)
{
GC_SET_REFCOUNT(object, 1);
GC_TYPE_INFO(object) = GC_OBJECT;
object->ce = ce;
object->properties = NULL;
zend_objects_store_put(object);
if (UNEXPECTED(ce->ce_flags & ZEND_ACC_USE_GUARDS)) {
ZVAL_UNDEF(object->properties_table + object->ce->default_properties_count);
}
}
ZEND_API void ZEND_FASTCALL zend_object_std_init(zend_object *object, zend_class_entry *ce)
{
_zend_object_std_init(object, ce);
}
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_DELREF(object->properties) == 0)
&& EXPECTED(GC_TYPE(object->properties) != IS_NULL)) {
zend_array_destroy(object->properties);
}
}
}
p = object->properties_table;
if (EXPECTED(object->ce->default_properties_count)) {
end = p + object->ce->default_properties_count;
do {
if (Z_REFCOUNTED_P(p)) {
if (UNEXPECTED(Z_ISREF_P(p)) &&
(ZEND_DEBUG || ZEND_REF_HAS_TYPE_SOURCES(Z_REF_P(p)))) {
zend_property_info *prop_info = zend_get_property_info_for_slot(object, p);
if (ZEND_TYPE_IS_SET(prop_info->type)) {
ZEND_REF_DEL_TYPE_SOURCE(Z_REF_P(p), prop_info);
}
}
i_zval_ptr_dtor(p);
}
p++;
} while (p != end);
}
if (UNEXPECTED(object->ce->ce_flags & ZEND_ACC_USE_GUARDS)) {
if (EXPECTED(Z_TYPE_P(p) == IS_STRING)) {
zval_ptr_dtor_str(p);
} else if (Z_TYPE_P(p) == IS_ARRAY) {
HashTable *guards;
guards = Z_ARRVAL_P(p);
ZEND_ASSERT(guards != NULL);
zend_hash_destroy(guards);
FREE_HASHTABLE(guards);
}
}
if (UNEXPECTED(GC_FLAGS(object) & IS_OBJ_WEAKLY_REFERENCED)) {
zend_weakrefs_notify(object);
}
}
ZEND_API void zend_objects_destroy_object(zend_object *object)
{
zend_function *destructor = object->ce->destructor;
if (destructor) {
zend_object *old_exception;
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 %s%s",
ZSTR_VAL(object->ce->name),
scope ? "scope " : "global scope",
scope ? ZSTR_VAL(scope->name) : ""
);
return;
}
} else {
zend_error(E_WARNING,
"Call to private %s::__destruct() from global scope 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 %s%s",
ZSTR_VAL(object->ce->name),
scope ? "scope " : "global scope",
scope ? ZSTR_VAL(scope->name) : ""
);
return;
}
} else {
zend_error(E_WARNING,
"Call to protected %s::__destruct() from global scope during shutdown ignored",
ZSTR_VAL(object->ce->name));
return;
}
}
}
GC_ADDREF(object);
/* 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_known_instance_method_with_0_params(destructor, object, NULL);
if (old_exception) {
if (EG(exception)) {
zend_exception_set_previous(EG(exception), old_exception);
} else {
EG(exception) = old_exception;
}
}
OBJ_RELEASE(object);
}
}
ZEND_API zend_object* ZEND_FASTCALL 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_FASTCALL 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);
ZVAL_COPY_VALUE_PROP(dst, src);
zval_add_ref(dst);
if (UNEXPECTED(Z_ISREF_P(dst)) &&
(ZEND_DEBUG || ZEND_REF_HAS_TYPE_SOURCES(Z_REF_P(dst)))) {
zend_property_info *prop_info = zend_get_property_info_for_slot(new_object, dst);
if (ZEND_TYPE_IS_SET(prop_info->type)) {
ZEND_REF_ADD_TYPE_SOURCE(Z_REF_P(dst), prop_info);
}
}
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_ADDREF(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) {
new_object->properties = zend_new_array(zend_hash_num_elements(old_object->properties));
zend_hash_real_init_mixed(new_object->properties);
} else {
zend_hash_extend(new_object->properties, new_object->properties->nNumUsed + zend_hash_num_elements(old_object->properties), 0);
}
HT_FLAGS(new_object->properties) |=
HT_FLAGS(old_object->properties) & 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) {
GC_ADDREF(new_object);
zend_call_known_instance_method_with_0_params(new_object->ce->clone, new_object, NULL);
OBJ_RELEASE(new_object);
}
}
ZEND_API zend_object *zend_objects_clone_obj(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 */
new_object = zend_objects_new(old_object->ce);
/* zend_objects_clone_members() expect the properties to be initialized. */
if (new_object->ce->default_properties_count) {
zval *p = new_object->properties_table;
zval *end = p + new_object->ce->default_properties_count;
do {
ZVAL_UNDEF(p);
p++;
} while (p != end);
}
zend_objects_clone_members(new_object, old_object);
return new_object;
}
|
