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Merge branch 'php7' of https://github.com/phpv8/v8js into php8

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This commit is contained in:
Stefan Siegl 2022-05-30 14:29:37 +02:00
commit 748310c894
4 changed files with 168 additions and 221 deletions
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30
tests/issue_472_basic.phpt Normal file
View File

@ -0,0 +1,30 @@
--TEST--
Test V8::executeString() : Issue #472 Destroy V8Js object which V8 isolate entered
--SKIPIF--
<?php require_once(dirname(__FILE__) . '/skipif.inc'); ?>
--FILE--
<?php
class myjs extends \V8Js
{
public function bosh()
{
$GLOBALS['v8test'] = null;
unset($GLOBALS['v8test']);
}
}
$GLOBALS['v8test'] = new myjs('myjs');
$ret = $GLOBALS['v8test']->executeString('
(() => {
myjs.bosh()
})
');
$ret();
var_dump($ret);
?>
===EOF===
--EXPECTF--
object(V8Function)#%d (0) {
}
===EOF===

4
v8js_class.h
View File

@ -83,6 +83,10 @@ static inline struct v8js_ctx *v8js_ctx_fetch_object(zend_object *obj) {
return (struct v8js_ctx *)((char *)obj - XtOffsetOf(struct v8js_ctx, std));
}
static inline zend_object *v8js_ctx_to_zend_object(struct v8js_ctx *ctx) {
return (zend_object *)((char *)ctx + XtOffsetOf(struct v8js_ctx, std));
}
#define Z_V8JS_CTX_OBJ_P(zv) v8js_ctx_fetch_object(Z_OBJ_P(zv));
#define Z_V8JS_CTX_OBJ(zv) v8js_ctx_fetch_object(zv);

234
v8js_v8.cc
View File

@ -120,135 +120,151 @@ void v8js_v8_call(v8js_ctx *c, zval **return_value,
{
char *tz = NULL;
V8JS_CTX_PROLOGUE(c);
// hold extra reference on v8 instance as long as we call into V8 (issue #472)
zend_object *obj = v8js_ctx_to_zend_object(c);
zval zv_v8inst;
ZVAL_OBJ(&zv_v8inst, obj);
Z_ADDREF_P(&zv_v8inst);
V8JSG(timer_mutex).lock();
c->time_limit_hit = false;
c->memory_limit_hit = false;
V8JSG(timer_mutex).unlock();
{
V8JS_CTX_PROLOGUE(c);
/* Catch JS exceptions */
v8::TryCatch try_catch(isolate);
V8JSG(timer_mutex).lock();
c->time_limit_hit = false;
c->memory_limit_hit = false;
V8JSG(timer_mutex).unlock();
/* Set flags for runtime use */
c->flags = flags;
/* Catch JS exceptions */
v8::TryCatch try_catch(isolate);
/* Check if timezone has been changed and notify V8 */
tz = getenv("TZ");
/* Set flags for runtime use */
c->flags = flags;
if (tz != NULL) {
if (c->tz == NULL) {
c->tz = strdup(tz);
}
else if (strcmp(c->tz, tz) != 0) {
c->isolate->DateTimeConfigurationChangeNotification();
/* Check if timezone has been changed and notify V8 */
tz = getenv("TZ");
free(c->tz);
c->tz = strdup(tz);
}
}
if (tz != NULL) {
if (c->tz == NULL) {
c->tz = strdup(tz);
}
else if (strcmp(c->tz, tz) != 0) {
c->isolate->DateTimeConfigurationChangeNotification();
if (time_limit > 0 || memory_limit > 0) {
// If timer thread is not running then start it
if (!V8JSG(timer_thread)) {
// If not, start timer thread
V8JSG(timer_thread) = new std::thread(v8js_timer_thread, ZEND_MODULE_GLOBALS_BULK(v8js));
}
}
/* Always pass the timer to the stack so there can be follow-up changes to
* the time & memory limit. */
v8js_timer_push(time_limit, memory_limit, c);
/* Execute script */
c->in_execution++;
v8::MaybeLocal<v8::Value> result = v8_call(c->isolate);
c->in_execution--;
/* Pop our context from the stack and read (possibly updated) limits
* into local variables. */
V8JSG(timer_mutex).lock();
v8js_timer_ctx *timer_ctx = V8JSG(timer_stack).front();
V8JSG(timer_stack).pop_front();
V8JSG(timer_mutex).unlock();
time_limit = timer_ctx->time_limit;
memory_limit = timer_ctx->memory_limit;
efree(timer_ctx);
if(!V8JSG(fatal_error_abort)) {
char exception_string[64];
if (c->time_limit_hit) {
// Execution has been terminated due to time limit
sprintf(exception_string, "Script time limit of %lu milliseconds exceeded", time_limit);
zend_throw_exception(php_ce_v8js_time_limit_exception, exception_string, 0);
return;
free(c->tz);
c->tz = strdup(tz);
}
}
if (memory_limit && !c->memory_limit_hit) {
// Re-check memory limit (very short executions might never be hit by timer thread)
v8::HeapStatistics hs;
isolate->GetHeapStatistics(&hs);
if (time_limit > 0 || memory_limit > 0) {
// If timer thread is not running then start it
if (!V8JSG(timer_thread)) {
// If not, start timer thread
V8JSG(timer_thread) = new std::thread(v8js_timer_thread, ZEND_MODULE_GLOBALS_BULK(v8js));
}
}
if (hs.used_heap_size() > memory_limit) {
isolate->LowMemoryNotification();
/* Always pass the timer to the stack so there can be follow-up changes to
* the time & memory limit. */
v8js_timer_push(time_limit, memory_limit, c);
/* Execute script */
c->in_execution++;
v8::MaybeLocal<v8::Value> result = v8_call(c->isolate);
c->in_execution--;
/* Pop our context from the stack and read (possibly updated) limits
* into local variables. */
V8JSG(timer_mutex).lock();
v8js_timer_ctx *timer_ctx = V8JSG(timer_stack).front();
V8JSG(timer_stack).pop_front();
V8JSG(timer_mutex).unlock();
time_limit = timer_ctx->time_limit;
memory_limit = timer_ctx->memory_limit;
efree(timer_ctx);
if(!V8JSG(fatal_error_abort)) {
char exception_string[64];
if (c->time_limit_hit) {
// Execution has been terminated due to time limit
sprintf(exception_string, "Script time limit of %lu milliseconds exceeded", time_limit);
zend_throw_exception(php_ce_v8js_time_limit_exception, exception_string, 0);
zval_ptr_dtor(&zv_v8inst);
return;
}
if (memory_limit && !c->memory_limit_hit) {
// Re-check memory limit (very short executions might never be hit by timer thread)
v8::HeapStatistics hs;
isolate->GetHeapStatistics(&hs);
if (hs.used_heap_size() > memory_limit) {
c->memory_limit_hit = true;
}
}
}
isolate->LowMemoryNotification();
isolate->GetHeapStatistics(&hs);
if (c->memory_limit_hit) {
// Execution has been terminated due to memory limit
sprintf(exception_string, "Script memory limit of %lu bytes exceeded", memory_limit);
zend_throw_exception(php_ce_v8js_memory_limit_exception, exception_string, 0);
return;
}
if (!try_catch.CanContinue()) {
// At this point we can't re-throw the exception
return;
}
/* There was pending exception left from earlier executions -> throw to PHP */
if (Z_TYPE(c->pending_exception) == IS_OBJECT) {
zend_throw_exception_object(&c->pending_exception);
ZVAL_NULL(&c->pending_exception);
}
/* Handle runtime JS exceptions */
if (try_catch.HasCaught()) {
/* Pending exceptions are set only in outer caller, inner caller exceptions are always rethrown */
if (c->in_execution < 1) {
/* Report immediately if report_uncaught is true */
if (c->report_uncaught) {
v8js_throw_script_exception(c->isolate, &try_catch);
return;
}
/* Exception thrown from JS, preserve it for future execution */
if (result.IsEmpty()) {
v8js_create_script_exception(&c->pending_exception, c->isolate, &try_catch);
return;
if (hs.used_heap_size() > memory_limit) {
c->memory_limit_hit = true;
}
}
}
/* Rethrow back to JS */
try_catch.ReThrow();
return;
}
if (c->memory_limit_hit) {
// Execution has been terminated due to memory limit
sprintf(exception_string, "Script memory limit of %lu bytes exceeded", memory_limit);
zend_throw_exception(php_ce_v8js_memory_limit_exception, exception_string, 0);
zval_ptr_dtor(&zv_v8inst);
return;
}
/* Convert V8 value to PHP value */
if (return_value && !result.IsEmpty()) {
v8js_to_zval(result.ToLocalChecked(), *return_value, flags, c->isolate);
if (!try_catch.CanContinue()) {
// At this point we can't re-throw the exception
zval_ptr_dtor(&zv_v8inst);
return;
}
/* There was pending exception left from earlier executions -> throw to PHP */
if (Z_TYPE(c->pending_exception) == IS_OBJECT) {
zend_throw_exception_object(&c->pending_exception);
ZVAL_NULL(&c->pending_exception);
}
/* Handle runtime JS exceptions */
if (try_catch.HasCaught()) {
/* Pending exceptions are set only in outer caller, inner caller exceptions are always rethrown */
if (c->in_execution < 1) {
/* Report immediately if report_uncaught is true */
if (c->report_uncaught) {
v8js_throw_script_exception(c->isolate, &try_catch);
zval_ptr_dtor(&zv_v8inst);
return;
}
/* Exception thrown from JS, preserve it for future execution */
if (result.IsEmpty()) {
v8js_create_script_exception(&c->pending_exception, c->isolate, &try_catch);
zval_ptr_dtor(&zv_v8inst);
return;
}
}
/* Rethrow back to JS */
try_catch.ReThrow();
zval_ptr_dtor(&zv_v8inst);
return;
}
/* Convert V8 value to PHP value */
if (return_value && !result.IsEmpty()) {
v8js_to_zval(result.ToLocalChecked(), *return_value, flags, c->isolate);
}
}
}
zval_ptr_dtor(&zv_v8inst);
}
/* }}} */

121
v8js_v8object_class.cc
View File

@ -276,6 +276,14 @@ static HashTable *v8js_v8object_get_properties(zend_object *object) /* {{{ */
}
/* }}} */
static HashTable *v8js_v8object_get_gc(zend_object *object, zval **table, int *n) /* {{{ */
{
*table = NULL;
*n = 0;
return NULL;
}
/* }}} */
static HashTable *v8js_v8object_get_debug_info(zend_object *object, int *is_temp) /* {{{ */
{
*is_temp = 0;
@ -456,118 +464,6 @@ static zend_function *v8js_v8object_get_method(zend_object **object_ptr, zend_st
}
/* }}} */
static int v8js_v8object_call_method(zend_string *method, zend_object *object, INTERNAL_FUNCTION_PARAMETERS) /* {{{ */
{
zval *argv = NULL;
int argc = ZEND_NUM_ARGS();
v8js_v8object *obj = v8js_v8object_fetch_object(object);
if (!obj->ctx)
{
zend_throw_exception(php_ce_v8js_exception,
"Can't access V8Object after V8Js instance is destroyed!", 0);
return FAILURE;
}
if (obj->v8obj.IsEmpty())
{
return FAILURE;
}
if (ZSTR_LEN(method) > std::numeric_limits<int>::max())
{
zend_throw_exception(php_ce_v8js_exception,
"Method name length exceeds maximum supported length", 0);
return FAILURE;
}
if (argc > 0)
{
argv = (zval *)safe_emalloc(sizeof(zval), argc, 0);
zend_get_parameters_array_ex(argc, argv);
}
/* std::function relies on its dtor to be executed, otherwise it leaks
* some memory on bailout. */
{
std::function<v8::MaybeLocal<v8::Value>(v8::Isolate *)> v8_call = [obj, method, argc, argv, object, &return_value](v8::Isolate *isolate)
{
int i = 0;
v8::Local<v8::Context> v8_context = isolate->GetEnteredOrMicrotaskContext();
v8::Local<v8::String> method_name = V8JS_SYML(ZSTR_VAL(method), static_cast<int>(ZSTR_LEN(method)));
v8::Local<v8::Object> v8obj = v8::Local<v8::Value>::New(isolate, obj->v8obj)->ToObject(v8_context).ToLocalChecked();
v8::Local<v8::Object> thisObj;
v8::Local<v8::Function> cb;
if (method_name->Equals(v8_context, V8JS_SYM(V8JS_V8_INVOKE_FUNC_NAME)).FromMaybe(false))
{
cb = v8::Local<v8::Function>::Cast(v8obj);
}
else
{
v8::Local<v8::Value> slot;
if (!v8obj->Get(v8_context, method_name).ToLocal(&slot))
{
return v8::MaybeLocal<v8::Value>();
}
cb = v8::Local<v8::Function>::Cast(slot);
}
// If a method is invoked on V8Object, then set the object itself as
// "this" on JS side. Otherwise fall back to global object.
if (obj->std.ce == php_ce_v8object)
{
thisObj = v8obj;
}
else
{
thisObj = V8JS_GLOBAL(isolate);
}
v8::Local<v8::Value> *jsArgv = static_cast<v8::Local<v8::Value> *>(alloca(sizeof(v8::Local<v8::Value>) * argc));
for (i = 0; i < argc; i++)
{
new (&jsArgv[i]) v8::Local<v8::Value>;
jsArgv[i] = v8::Local<v8::Value>::New(isolate, zval_to_v8js(&argv[i], isolate));
}
v8::MaybeLocal<v8::Value> result = cb->Call(v8_context, thisObj, argc, jsArgv);
if (obj->std.ce == php_ce_v8object && !result.IsEmpty() && result.ToLocalChecked()->StrictEquals(thisObj))
{
/* JS code did "return this", retain object identity */
ZVAL_OBJ(return_value, object);
zval_copy_ctor(return_value);
result = v8::MaybeLocal<v8::Value>();
}
return result;
};
v8js_v8_call(obj->ctx, &return_value, obj->flags, obj->ctx->time_limit, obj->ctx->memory_limit, v8_call);
}
if (argc > 0)
{
efree(argv);
}
if (V8JSG(fatal_error_abort))
{
/* Check for fatal error marker possibly set by v8js_error_handler; just
* rethrow the error since we're now out of V8. */
zend_bailout();
}
return SUCCESS;
}
/* }}} */
static int v8js_v8object_get_closure(zend_object *object, zend_class_entry **ce_ptr, zend_function **fptr_ptr, zend_object **zobj_ptr, bool call) /* {{{ */
{
zend_internal_function *invoke;
@ -1023,6 +919,7 @@ PHP_MINIT_FUNCTION(v8js_v8object_class) /* {{{ */
v8js_v8object_handlers.unset_property = v8js_v8object_unset_property;
v8js_v8object_handlers.get_properties = v8js_v8object_get_properties;
v8js_v8object_handlers.get_method = v8js_v8object_get_method;
v8js_v8object_handlers.get_gc = v8js_v8object_get_gc;
v8js_v8object_handlers.get_debug_info = v8js_v8object_get_debug_info;
v8js_v8object_handlers.get_closure = v8js_v8object_get_closure;
v8js_v8object_handlers.offset = XtOffsetOf(struct v8js_v8object, std);