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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331
|
/*
+----------------------------------------------------------------------+
| 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"
#include "zend_lazy_objects.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->extra_flags = 0;
object->handlers = ce->default_object_handlers;
object->properties = NULL;
zend_objects_store_put(object);
if (UNEXPECTED(ce->ce_flags & ZEND_ACC_USE_GUARDS)) {
zval *guard_value = object->properties_table + object->ce->default_properties_count;
ZVAL_UNDEF(guard_value);
Z_GUARD_P(guard_value) = 0;
}
}
ZEND_API void ZEND_FASTCALL zend_object_std_init(zend_object *object, zend_class_entry *ce)
{
_zend_object_std_init(object, ce);
}
void zend_object_dtor_dynamic_properties(zend_object *object)
{
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);
}
}
}
}
void zend_object_dtor_property(zend_object *object, zval *p)
{
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_self(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);
}
}
ZEND_API void zend_object_std_dtor(zend_object *object)
{
zval *p, *end;
if (UNEXPECTED(GC_FLAGS(object) & IS_OBJ_WEAKLY_REFERENCED)) {
zend_weakrefs_notify(object);
}
if (UNEXPECTED(zend_object_is_lazy(object))) {
zend_lazy_object_del_info(object);
}
zend_object_dtor_dynamic_properties(object);
p = object->properties_table;
if (EXPECTED(object->ce->default_properties_count)) {
end = p + object->ce->default_properties_count;
do {
zend_object_dtor_property(object, 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);
}
}
}
ZEND_API void zend_objects_destroy_object(zend_object *object)
{
zend_function *destructor = object->ce->destructor;
if (destructor) {
if (UNEXPECTED(zend_object_is_lazy(object))) {
return;
}
zend_object *old_exception;
const zend_op *old_opline_before_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 {
if (EG(current_execute_data)
&& EG(current_execute_data)->func
&& ZEND_USER_CODE(EG(current_execute_data)->func->common.type)) {
zend_rethrow_exception(EG(current_execute_data));
}
old_exception = EG(exception);
old_opline_before_exception = EG(opline_before_exception);
EG(exception) = NULL;
}
}
zend_call_known_instance_method_with_0_params(destructor, object, NULL);
if (old_exception) {
EG(opline_before_exception) = old_opline_before_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);
return object;
}
ZEND_API void ZEND_FASTCALL zend_objects_clone_members(zend_object *new_object, zend_object *old_object)
{
bool has_clone_method = old_object->ce->clone != NULL;
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 (has_clone_method) {
/* Unconditionally add the IS_PROP_REINITABLE flag to avoid a potential cache miss of property_info */
Z_PROP_FLAG_P(dst) |= IS_PROP_REINITABLE;
}
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_self(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 && !has_clone_method) {
/* 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_MAP_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 (has_clone_method) {
/* Unconditionally add the IS_PROP_REINITABLE flag to avoid a potential cache miss of property_info */
Z_PROP_FLAG_P(&new_prop) |= IS_PROP_REINITABLE;
}
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 (has_clone_method) {
GC_ADDREF(new_object);
zend_call_known_instance_method_with_0_params(new_object->ce->clone, new_object, NULL);
if (ZEND_CLASS_HAS_READONLY_PROPS(new_object->ce)) {
for (uint32_t i = 0; i < new_object->ce->default_properties_count; i++) {
zval* prop = OBJ_PROP_NUM(new_object, i);
/* Unconditionally remove the IS_PROP_REINITABLE flag to avoid a potential cache miss of property_info */
Z_PROP_FLAG_P(prop) &= ~IS_PROP_REINITABLE;
}
}
OBJ_RELEASE(new_object);
}
}
ZEND_API zend_object *zend_objects_clone_obj(zend_object *old_object)
{
zend_object *new_object;
if (UNEXPECTED(zend_object_is_lazy(old_object))) {
return zend_lazy_object_clone(old_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;
}
|