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|
/*
+----------------------------------------------------------------------+
| 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_objects_API.h"
ZEND_API void ZEND_FASTCALL zend_objects_store_init(zend_objects_store *objects, uint32_t init_size)
{
objects->object_buckets = (zend_object **) emalloc(init_size * sizeof(zend_object*));
objects->top = 1; /* Skip 0 so that handles are true */
objects->size = init_size;
objects->free_list_head = -1;
memset(&objects->object_buckets[0], 0, sizeof(zend_object*));
}
ZEND_API void ZEND_FASTCALL zend_objects_store_destroy(zend_objects_store *objects)
{
efree(objects->object_buckets);
objects->object_buckets = NULL;
}
ZEND_API void ZEND_FASTCALL zend_objects_store_call_destructors(zend_objects_store *objects)
{
EG(flags) |= EG_FLAGS_OBJECT_STORE_NO_REUSE;
if (objects->top > 1) {
uint32_t i;
for (i = 1; i < objects->top; i++) {
zend_object *obj = objects->object_buckets[i];
if (IS_OBJ_VALID(obj)) {
if (!(OBJ_FLAGS(obj) & IS_OBJ_DESTRUCTOR_CALLED)) {
GC_ADD_FLAGS(obj, IS_OBJ_DESTRUCTOR_CALLED);
if (obj->handlers->dtor_obj != zend_objects_destroy_object
|| obj->ce->destructor) {
GC_ADDREF(obj);
obj->handlers->dtor_obj(obj);
GC_DELREF(obj);
}
}
}
}
}
}
ZEND_API void ZEND_FASTCALL zend_objects_store_mark_destructed(zend_objects_store *objects)
{
if (objects->object_buckets && objects->top > 1) {
zend_object **obj_ptr = objects->object_buckets + 1;
zend_object **end = objects->object_buckets + objects->top;
do {
zend_object *obj = *obj_ptr;
if (IS_OBJ_VALID(obj)) {
GC_ADD_FLAGS(obj, IS_OBJ_DESTRUCTOR_CALLED);
}
obj_ptr++;
} while (obj_ptr != end);
}
}
ZEND_API void ZEND_FASTCALL zend_objects_store_free_object_storage(zend_objects_store *objects, bool fast_shutdown)
{
zend_object **obj_ptr, **end, *obj;
if (objects->top <= 1) {
return;
}
/* Free object contents, but don't free objects themselves, so they show up as leaks.
* Also add a ref to all objects, so the object can't be freed by something else later. */
end = objects->object_buckets + 1;
obj_ptr = objects->object_buckets + objects->top;
if (fast_shutdown) {
do {
obj_ptr--;
obj = *obj_ptr;
if (IS_OBJ_VALID(obj)) {
if (!(OBJ_FLAGS(obj) & IS_OBJ_FREE_CALLED)) {
GC_ADD_FLAGS(obj, IS_OBJ_FREE_CALLED);
if (obj->handlers->free_obj != zend_object_std_dtor) {
GC_ADDREF(obj);
obj->handlers->free_obj(obj);
}
}
}
} while (obj_ptr != end);
} else {
do {
obj_ptr--;
obj = *obj_ptr;
if (IS_OBJ_VALID(obj)) {
if (!(OBJ_FLAGS(obj) & IS_OBJ_FREE_CALLED)) {
GC_ADD_FLAGS(obj, IS_OBJ_FREE_CALLED);
GC_ADDREF(obj);
obj->handlers->free_obj(obj);
}
}
} while (obj_ptr != end);
}
}
/* Store objects API */
static ZEND_COLD zend_never_inline void ZEND_FASTCALL zend_objects_store_put_cold(zend_object *object)
{
int handle;
uint32_t new_size = 2 * EG(objects_store).size;
EG(objects_store).object_buckets = (zend_object **) erealloc(EG(objects_store).object_buckets, new_size * sizeof(zend_object*));
/* Assign size after realloc, in case it fails */
EG(objects_store).size = new_size;
handle = EG(objects_store).top++;
object->handle = handle;
EG(objects_store).object_buckets[handle] = object;
}
ZEND_API void ZEND_FASTCALL zend_objects_store_put(zend_object *object)
{
int handle;
/* When in shutdown sequence - do not reuse previously freed handles, to make sure
* the dtors for newly created objects are called in zend_objects_store_call_destructors() loop
*/
if (EG(objects_store).free_list_head != -1 && EXPECTED(!(EG(flags) & EG_FLAGS_OBJECT_STORE_NO_REUSE))) {
handle = EG(objects_store).free_list_head;
EG(objects_store).free_list_head = GET_OBJ_BUCKET_NUMBER(EG(objects_store).object_buckets[handle]);
} else if (UNEXPECTED(EG(objects_store).top == EG(objects_store).size)) {
zend_objects_store_put_cold(object);
return;
} else {
handle = EG(objects_store).top++;
}
object->handle = handle;
EG(objects_store).object_buckets[handle] = object;
}
ZEND_API void ZEND_FASTCALL zend_objects_store_del(zend_object *object) /* {{{ */
{
ZEND_ASSERT(GC_REFCOUNT(object) == 0);
/* GC might have released this object already. */
if (UNEXPECTED(GC_TYPE(object) == IS_NULL)) {
return;
}
/* Make sure we hold a reference count during the destructor call
otherwise, when the destructor ends the storage might be freed
when the refcount reaches 0 a second time
*/
if (!(OBJ_FLAGS(object) & IS_OBJ_DESTRUCTOR_CALLED)) {
GC_ADD_FLAGS(object, IS_OBJ_DESTRUCTOR_CALLED);
if (object->handlers->dtor_obj != zend_objects_destroy_object
|| object->ce->destructor) {
GC_SET_REFCOUNT(object, 1);
object->handlers->dtor_obj(object);
GC_DELREF(object);
}
}
if (GC_REFCOUNT(object) == 0) {
uint32_t handle = object->handle;
void *ptr;
ZEND_ASSERT(EG(objects_store).object_buckets != NULL);
ZEND_ASSERT(IS_OBJ_VALID(EG(objects_store).object_buckets[handle]));
EG(objects_store).object_buckets[handle] = SET_OBJ_INVALID(object);
if (!(OBJ_FLAGS(object) & IS_OBJ_FREE_CALLED)) {
GC_ADD_FLAGS(object, IS_OBJ_FREE_CALLED);
GC_SET_REFCOUNT(object, 1);
object->handlers->free_obj(object);
}
ptr = ((char*)object) - object->handlers->offset;
GC_REMOVE_FROM_BUFFER(object);
efree(ptr);
ZEND_OBJECTS_STORE_ADD_TO_FREE_LIST(handle);
}
}
/* }}} */
|
