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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: Levi Morrison <levim@php.net> |
| Sammy Kaye Powers <sammyk@php.net> |
+----------------------------------------------------------------------+
*/
#include "zend_observer.h"
#include "zend_extensions.h"
#include "zend_llist.h"
#include "zend_vm.h"
zend_llist zend_observers_fcall_list;
int zend_observer_fcall_op_array_extension = -1;
ZEND_TLS zend_arena *fcall_handlers_arena = NULL;
ZEND_API extern inline void zend_observer_maybe_fcall_call_begin(
zend_execute_data *execute_data);
ZEND_API extern inline void zend_observer_maybe_fcall_call_end(
zend_execute_data *execute_data,
zval *return_value);
// Call during minit/startup ONLY
ZEND_API void zend_observer_fcall_register(zend_observer_fcall_init init) {
/* We don't want to get an extension handle unless an ext installs an observer */
if (!ZEND_OBSERVER_ENABLED) {
zend_observer_fcall_op_array_extension =
zend_get_op_array_extension_handle();
/* ZEND_CALL_TRAMPOLINE has SPEC(OBSERVER) but zend_init_call_trampoline_op()
* is called before any extensions have registered as an observer. So we
* adjust the offset to the observed handler when we know we need to observe. */
ZEND_VM_SET_OPCODE_HANDLER(&EG(call_trampoline_op));
/* ZEND_HANDLE_EXCEPTION also has SPEC(OBSERVER) and no observer extensions
* exist when zend_init_exception_op() is called. */
ZEND_VM_SET_OPCODE_HANDLER(EG(exception_op));
ZEND_VM_SET_OPCODE_HANDLER(EG(exception_op)+1);
ZEND_VM_SET_OPCODE_HANDLER(EG(exception_op)+2);
}
zend_llist_add_element(&zend_observers_fcall_list, &init);
}
// Called by engine before MINITs
ZEND_API void zend_observer_startup(void) {
zend_llist_init(&zend_observers_fcall_list, sizeof(zend_observer_fcall_init), NULL, 1);
}
ZEND_API void zend_observer_activate(void) {
if (ZEND_OBSERVER_ENABLED) {
fcall_handlers_arena = zend_arena_create(4096);
}
}
ZEND_API void zend_observer_deactivate(void) {
if (fcall_handlers_arena) {
zend_arena_destroy(fcall_handlers_arena);
}
}
ZEND_API void zend_observer_shutdown(void) {
zend_llist_destroy(&zend_observers_fcall_list);
}
ZEND_API void zend_observer_fcall_install(zend_function *function) {
zend_llist_element *element;
zend_llist *list = &zend_observers_fcall_list;
zend_op_array *op_array = &function->op_array;
if (fcall_handlers_arena == NULL) {
return;
}
ZEND_ASSERT(function->type != ZEND_INTERNAL_FUNCTION);
zend_llist handlers_list;
zend_llist_init(&handlers_list, sizeof(zend_observer_fcall), NULL, 0);
for (element = list->head; element; element = element->next) {
zend_observer_fcall_init init;
memcpy(&init, element->data, sizeof init);
zend_observer_fcall handlers = init(function);
if (handlers.begin || handlers.end) {
zend_llist_add_element(&handlers_list, &handlers);
}
}
ZEND_ASSERT(RUN_TIME_CACHE(op_array));
void *ext;
if (handlers_list.count) {
size_t size = sizeof(zend_observer_fcall_cache) + (handlers_list.count - 1) * sizeof(zend_observer_fcall);
zend_observer_fcall_cache *cache = zend_arena_alloc(&fcall_handlers_arena, size);
zend_observer_fcall *handler = cache->handlers;
for (element = handlers_list.head; element; element = element->next) {
memcpy(handler++, element->data, sizeof *handler);
}
cache->end = handler;
ext = cache;
} else {
ext = ZEND_OBSERVER_NOT_OBSERVED;
}
ZEND_OBSERVER_HANDLERS(op_array) = ext;
zend_llist_destroy(&handlers_list);
}
ZEND_API void zend_observe_fcall_begin(
zend_observer_fcall_cache *cache,
zend_execute_data *execute_data)
{
zend_observer_fcall *handler, *end = cache->end;
for (handler = cache->handlers; handler != end; ++handler) {
if (handler->begin) {
handler->begin(execute_data);
}
}
}
ZEND_API void zend_observer_fcall_call_end_helper(
zend_execute_data *execute_data,
zval *return_value)
{
zend_function *func = execute_data->func;
ZEND_ASSUME(ZEND_OBSERVABLE_FN(func->common.fn_flags));
void *observer_handlers = ZEND_OBSERVER_HANDLERS(&func->op_array);
// TODO: Fix exceptions from generators
// ZEND_ASSERT(observer_handlers);
if (observer_handlers && observer_handlers != ZEND_OBSERVER_NOT_OBSERVED) {
zend_observer_fcall_cache *cache = observer_handlers;
zend_observe_fcall_end(cache, execute_data, return_value);
}
}
ZEND_API void zend_observe_fcall_end(
zend_observer_fcall_cache *cache,
zend_execute_data *execute_data,
zval *return_value)
{
zend_observer_fcall *handler = cache->end, *end = cache->handlers;
while (handler-- != end) {
if (handler->end) {
handler->end(execute_data, return_value);
}
}
}
|
