1 /*
2 +----------------------------------------------------------------------+
3 | Zend Engine |
4 +----------------------------------------------------------------------+
5 | Copyright (c) 1998-2017 Zend Technologies Ltd. (http://www.zend.com) |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 2.00 of the Zend license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | http://www.zend.com/license/2_00.txt. |
11 | If you did not receive a copy of the Zend license and are unable to |
12 | obtain it through the world-wide-web, please send a note to |
13 | license@zend.com so we can mail you a copy immediately. |
14 +----------------------------------------------------------------------+
15 | Authors: Andi Gutmans <andi@zend.com> |
16 | Zeev Suraski <zeev@zend.com> |
17 | Dmitry Stogov <dmitry@zend.com> |
18 +----------------------------------------------------------------------+
19 */
20
21 /* $Id$ */
22
23 #include "zend.h"
24 #include "zend_globals.h"
25 #include "zend_variables.h"
26 #include "zend_API.h"
27 #include "zend_interfaces.h"
28 #include "zend_exceptions.h"
29
zend_object_std_init(zend_object * object,zend_class_entry * ce)30 ZEND_API void zend_object_std_init(zend_object *object, zend_class_entry *ce)
31 {
32 zval *p, *end;
33
34 GC_REFCOUNT(object) = 1;
35 GC_TYPE_INFO(object) = IS_OBJECT;
36 object->ce = ce;
37 object->properties = NULL;
38 zend_objects_store_put(object);
39 p = object->properties_table;
40 if (EXPECTED(ce->default_properties_count != 0)) {
41 end = p + ce->default_properties_count;
42 do {
43 ZVAL_UNDEF(p);
44 p++;
45 } while (p != end);
46 }
47 if (UNEXPECTED(ce->ce_flags & ZEND_ACC_USE_GUARDS)) {
48 GC_FLAGS(object) |= IS_OBJ_USE_GUARDS;
49 Z_PTR_P(p) = NULL;
50 ZVAL_UNDEF(p);
51 }
52 }
53
zend_object_std_dtor(zend_object * object)54 ZEND_API void zend_object_std_dtor(zend_object *object)
55 {
56 zval *p, *end;
57
58 if (object->properties) {
59 if (EXPECTED(!(GC_FLAGS(object->properties) & IS_ARRAY_IMMUTABLE))) {
60 if (EXPECTED(--GC_REFCOUNT(object->properties) == 0)) {
61 zend_array_destroy(object->properties);
62 }
63 }
64 }
65 p = object->properties_table;
66 if (EXPECTED(object->ce->default_properties_count)) {
67 end = p + object->ce->default_properties_count;
68 do {
69 i_zval_ptr_dtor(p ZEND_FILE_LINE_CC);
70 p++;
71 } while (p != end);
72 }
73 if (UNEXPECTED(GC_FLAGS(object) & IS_OBJ_HAS_GUARDS)) {
74 HashTable *guards = Z_PTR_P(p);
75
76 ZEND_ASSERT(guards != NULL);
77 zend_hash_destroy(guards);
78 FREE_HASHTABLE(guards);
79 }
80 }
81
zend_objects_destroy_object(zend_object * object)82 ZEND_API void zend_objects_destroy_object(zend_object *object)
83 {
84 zend_function *destructor = object ? object->ce->destructor : NULL;
85
86 if (destructor) {
87 zend_object *old_exception;
88 zval obj;
89
90 if (destructor->op_array.fn_flags & (ZEND_ACC_PRIVATE|ZEND_ACC_PROTECTED)) {
91 if (destructor->op_array.fn_flags & ZEND_ACC_PRIVATE) {
92 /* Ensure that if we're calling a private function, we're allowed to do so.
93 */
94 if (object->ce != EG(scope)) {
95 zend_class_entry *ce = object->ce;
96
97 if (EG(current_execute_data)) {
98 zend_throw_error(NULL,
99 "Call to private %s::__destruct() from context '%s'",
100 ZSTR_VAL(ce->name),
101 EG(scope) ? ZSTR_VAL(EG(scope)->name) : "");
102 } else {
103 zend_error(E_WARNING,
104 "Call to private %s::__destruct() from context '%s' during shutdown ignored",
105 ZSTR_VAL(ce->name),
106 EG(scope) ? ZSTR_VAL(EG(scope)->name) : "");
107 }
108 return;
109 }
110 } else {
111 /* Ensure that if we're calling a protected function, we're allowed to do so.
112 */
113 if (!zend_check_protected(zend_get_function_root_class(destructor), EG(scope))) {
114 zend_class_entry *ce = object->ce;
115
116 if (EG(current_execute_data)) {
117 zend_throw_error(NULL,
118 "Call to protected %s::__destruct() from context '%s'",
119 ZSTR_VAL(ce->name),
120 EG(scope) ? ZSTR_VAL(EG(scope)->name) : "");
121 } else {
122 zend_error(E_WARNING,
123 "Call to protected %s::__destruct() from context '%s' during shutdown ignored",
124 ZSTR_VAL(ce->name),
125 EG(scope) ? ZSTR_VAL(EG(scope)->name) : "");
126 }
127 return;
128 }
129 }
130 }
131
132 ZVAL_OBJ(&obj, object);
133 Z_ADDREF(obj);
134
135 /* Make sure that destructors are protected from previously thrown exceptions.
136 * For example, if an exception was thrown in a function and when the function's
137 * local variable destruction results in a destructor being called.
138 */
139 old_exception = NULL;
140 if (EG(exception)) {
141 if (EG(exception) == object) {
142 zend_error_noreturn(E_CORE_ERROR, "Attempt to destruct pending exception");
143 } else {
144 old_exception = EG(exception);
145 EG(exception) = NULL;
146 }
147 }
148 zend_call_method_with_0_params(&obj, object->ce, &destructor, ZEND_DESTRUCTOR_FUNC_NAME, NULL);
149 if (old_exception) {
150 if (EG(exception)) {
151 zend_exception_set_previous(EG(exception), old_exception);
152 } else {
153 EG(exception) = old_exception;
154 }
155 }
156 zval_ptr_dtor(&obj);
157 }
158 }
159
zend_objects_new(zend_class_entry * ce)160 ZEND_API zend_object *zend_objects_new(zend_class_entry *ce)
161 {
162 zend_object *object = emalloc(sizeof(zend_object) + zend_object_properties_size(ce));
163
164 zend_object_std_init(object, ce);
165 object->handlers = &std_object_handlers;
166 return object;
167 }
168
zend_objects_clone_members(zend_object * new_object,zend_object * old_object)169 ZEND_API void zend_objects_clone_members(zend_object *new_object, zend_object *old_object)
170 {
171 if (old_object->ce->default_properties_count) {
172 zval *src = old_object->properties_table;
173 zval *dst = new_object->properties_table;
174 zval *end = src + old_object->ce->default_properties_count;
175
176 do {
177 i_zval_ptr_dtor(dst ZEND_FILE_LINE_CC);
178 ZVAL_COPY_VALUE(dst, src);
179 zval_add_ref(dst);
180 src++;
181 dst++;
182 } while (src != end);
183 } else if (old_object->properties && !old_object->ce->clone) {
184 /* fast copy */
185 if (EXPECTED(old_object->handlers == &std_object_handlers)) {
186 if (EXPECTED(!(GC_FLAGS(old_object->properties) & IS_ARRAY_IMMUTABLE))) {
187 GC_REFCOUNT(old_object->properties)++;
188 }
189 new_object->properties = old_object->properties;
190 return;
191 }
192 }
193
194 if (old_object->properties &&
195 EXPECTED(zend_hash_num_elements(old_object->properties))) {
196 zval *prop, new_prop;
197 zend_ulong num_key;
198 zend_string *key;
199
200 if (!new_object->properties) {
201 ALLOC_HASHTABLE(new_object->properties);
202 zend_hash_init(new_object->properties, zend_hash_num_elements(old_object->properties), NULL, ZVAL_PTR_DTOR, 0);
203 zend_hash_real_init(new_object->properties, 0);
204 } else {
205 zend_hash_extend(new_object->properties, new_object->properties->nNumUsed + zend_hash_num_elements(old_object->properties), 0);
206 }
207
208 new_object->properties->u.v.flags |=
209 old_object->properties->u.v.flags & HASH_FLAG_HAS_EMPTY_IND;
210
211 ZEND_HASH_FOREACH_KEY_VAL(old_object->properties, num_key, key, prop) {
212 if (Z_TYPE_P(prop) == IS_INDIRECT) {
213 ZVAL_INDIRECT(&new_prop, new_object->properties_table + (Z_INDIRECT_P(prop) - old_object->properties_table));
214 } else {
215 ZVAL_COPY_VALUE(&new_prop, prop);
216 zval_add_ref(&new_prop);
217 }
218 if (EXPECTED(key)) {
219 _zend_hash_append(new_object->properties, key, &new_prop);
220 } else {
221 zend_hash_index_add_new(new_object->properties, num_key, &new_prop);
222 }
223 } ZEND_HASH_FOREACH_END();
224 }
225
226 if (old_object->ce->clone) {
227 zval new_obj;
228
229 ZVAL_OBJ(&new_obj, new_object);
230 zval_copy_ctor(&new_obj);
231 zend_call_method_with_0_params(&new_obj, old_object->ce, &old_object->ce->clone, ZEND_CLONE_FUNC_NAME, NULL);
232 zval_ptr_dtor(&new_obj);
233 }
234 }
235
zend_objects_clone_obj(zval * zobject)236 ZEND_API zend_object *zend_objects_clone_obj(zval *zobject)
237 {
238 zend_object *old_object;
239 zend_object *new_object;
240
241 /* assume that create isn't overwritten, so when clone depends on the
242 * overwritten one then it must itself be overwritten */
243 old_object = Z_OBJ_P(zobject);
244 new_object = zend_objects_new(old_object->ce);
245
246 zend_objects_clone_members(new_object, old_object);
247
248 return new_object;
249 }
250
251 /*
252 * Local variables:
253 * tab-width: 4
254 * c-basic-offset: 4
255 * indent-tabs-mode: t
256 * End:
257 */
258
