зеркало из https://github.com/mozilla/gecko-dev.git
141 строка
3.7 KiB
C++
141 строка
3.7 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
/*
|
|
* Tests that generational garbage collection post-barriers are correctly
|
|
* implemented for nsTArrays that contain JavaScript Values.
|
|
*/
|
|
|
|
#include "jsapi.h"
|
|
#include "nsTArray.h"
|
|
|
|
#include "gtest/gtest.h"
|
|
|
|
#include "js/TracingAPI.h"
|
|
#include "js/HeapAPI.h"
|
|
|
|
#include "mozilla/CycleCollectedJSContext.h"
|
|
|
|
using namespace JS;
|
|
using namespace mozilla;
|
|
|
|
template<class ArrayT>
|
|
static void
|
|
TraceArray(JSTracer* trc, void* data)
|
|
{
|
|
ArrayT* array = static_cast<ArrayT *>(data);
|
|
for (unsigned i = 0; i < array->Length(); ++i)
|
|
JS::TraceEdge(trc, &array->ElementAt(i), "array-element");
|
|
}
|
|
|
|
/*
|
|
* Use arrays with initial size much smaller than the final number of elements
|
|
* to test that moving Heap<T> elements works correctly.
|
|
*/
|
|
const size_t ElementCount = 100;
|
|
const size_t InitialElements = ElementCount / 10;
|
|
|
|
template<class ArrayT>
|
|
static void
|
|
RunTest(JSContext* cx, ArrayT* array)
|
|
{
|
|
JS_GC(cx);
|
|
|
|
ASSERT_TRUE(array != nullptr);
|
|
JS_AddExtraGCRootsTracer(cx, TraceArray<ArrayT>, array);
|
|
|
|
/*
|
|
* Create the array and fill it with new JS objects. With GGC these will be
|
|
* allocated in the nursery.
|
|
*/
|
|
RootedValue value(cx);
|
|
const char* property = "foo";
|
|
for (size_t i = 0; i < ElementCount; ++i) {
|
|
RootedObject obj(cx, JS_NewPlainObject(cx));
|
|
ASSERT_FALSE(JS::ObjectIsTenured(obj));
|
|
value = Int32Value(i);
|
|
ASSERT_TRUE(JS_SetProperty(cx, obj, property, value));
|
|
ASSERT_TRUE(array->AppendElement(obj, fallible));
|
|
}
|
|
|
|
/*
|
|
* If postbarriers are not working, we will crash here when we try to mark
|
|
* objects that have been moved to the tenured heap.
|
|
*/
|
|
JS_GC(cx);
|
|
|
|
/*
|
|
* Sanity check that our array contains what we expect.
|
|
*/
|
|
for (size_t i = 0; i < ElementCount; ++i) {
|
|
RootedObject obj(cx, array->ElementAt(i));
|
|
ASSERT_TRUE(JS::ObjectIsTenured(obj));
|
|
ASSERT_TRUE(JS_GetProperty(cx, obj, property, &value));
|
|
ASSERT_TRUE(value.isInt32());
|
|
ASSERT_EQ(static_cast<int32_t>(i), value.toInt32());
|
|
}
|
|
|
|
JS_RemoveExtraGCRootsTracer(cx, TraceArray<ArrayT>, array);
|
|
}
|
|
|
|
static void
|
|
CreateGlobalAndRunTest(JSContext* cx)
|
|
{
|
|
static const JSClassOps GlobalClassOps = {
|
|
nullptr, nullptr, nullptr, nullptr,
|
|
nullptr, nullptr, nullptr, nullptr,
|
|
nullptr, nullptr, nullptr,
|
|
JS_GlobalObjectTraceHook
|
|
};
|
|
|
|
static const JSClass GlobalClass = {
|
|
"global", JSCLASS_GLOBAL_FLAGS,
|
|
&GlobalClassOps
|
|
};
|
|
|
|
JS::CompartmentOptions options;
|
|
options.behaviors().setVersion(JSVERSION_LATEST);
|
|
JS::PersistentRootedObject global(cx);
|
|
global = JS_NewGlobalObject(cx, &GlobalClass, nullptr, JS::FireOnNewGlobalHook, options);
|
|
ASSERT_TRUE(global != nullptr);
|
|
|
|
JSCompartment *oldCompartment = JS_EnterCompartment(cx, global);
|
|
|
|
typedef Heap<JSObject*> ElementT;
|
|
|
|
{
|
|
nsTArray<ElementT>* array = new nsTArray<ElementT>(InitialElements);
|
|
RunTest(cx, array);
|
|
delete array;
|
|
}
|
|
|
|
{
|
|
FallibleTArray<ElementT>* array = new FallibleTArray<ElementT>(InitialElements);
|
|
RunTest(cx, array);
|
|
delete array;
|
|
}
|
|
|
|
{
|
|
AutoTArray<ElementT, InitialElements> array;
|
|
RunTest(cx, &array);
|
|
}
|
|
|
|
JS_LeaveCompartment(cx, oldCompartment);
|
|
}
|
|
|
|
TEST(GCPostBarriers, nsTArray) {
|
|
CycleCollectedJSContext* ccjscx = CycleCollectedJSContext::Get();
|
|
ASSERT_TRUE(ccjscx != nullptr);
|
|
JSContext* cx = ccjscx->Context();
|
|
ASSERT_TRUE(cx != nullptr);
|
|
|
|
JS_BeginRequest(cx);
|
|
|
|
CreateGlobalAndRunTest(cx);
|
|
|
|
JS_EndRequest(cx);
|
|
}
|