The Tor Browser / file comparison
comparison: xpcom/glue/tests/gtest/TestGCPostBarriers.cpp
xpcom/glue/tests/gtest/TestGCPostBarriers.cpp
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:8a340bc48b57 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- | |
| 2 * vim: sw=2 ts=8 et : | |
| 3 */ | |
| 4 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 5 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 6 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 7 | |
| 8 /* | |
| 9 * Tests that generational garbage collection post-barriers are correctly | |
| 10 * implemented for nsTArrays that contain JavaScript Values. | |
| 11 */ | |
| 12 | |
| 13 #include "jsapi.h" | |
| 14 #include "nsTArray.h" | |
| 15 | |
| 16 #include "gtest/gtest.h" | |
| 17 | |
| 18 #include "js/TracingAPI.h" | |
| 19 #include "js/HeapAPI.h" | |
| 20 | |
| 21 #include "mozilla/CycleCollectedJSRuntime.h" | |
| 22 | |
| 23 using namespace JS; | |
| 24 using namespace mozilla; | |
| 25 | |
| 26 template <class ArrayT> | |
| 27 static void | |
| 28 TraceArray(JSTracer* trc, void* data) | |
| 29 { | |
| 30 ArrayT* array = static_cast<ArrayT *>(data); | |
| 31 for (unsigned i = 0; i < array->Length(); ++i) | |
| 32 JS_CallHeapObjectTracer(trc, &array->ElementAt(i), "array-element"); | |
| 33 } | |
| 34 | |
| 35 /* | |
| 36 * Use arrays with initial size much smaller than the final number of elements | |
| 37 * to test that moving Heap<T> elements works correctly. | |
| 38 */ | |
| 39 const size_t ElementCount = 100; | |
| 40 const size_t InitialElements = ElementCount / 10; | |
| 41 | |
| 42 template <class ArrayT> | |
| 43 static void | |
| 44 RunTest(JSRuntime* rt, JSContext* cx, ArrayT* array) | |
| 45 { | |
| 46 JS_GC(rt); | |
| 47 | |
| 48 ASSERT_TRUE(array != nullptr); | |
| 49 JS_AddExtraGCRootsTracer(rt, TraceArray<ArrayT>, array); | |
| 50 | |
| 51 /* | |
| 52 * Create the array and fill it with new JS objects. With GGC these will be | |
| 53 * allocated in the nursery. | |
| 54 */ | |
| 55 RootedValue value(cx); | |
| 56 const char* property = "foo"; | |
| 57 JS::shadow::Runtime* srt = reinterpret_cast<JS::shadow::Runtime*>(rt); | |
| 58 for (size_t i = 0; i < ElementCount; ++i) { | |
| 59 RootedObject obj(cx, JS_NewObject(cx, nullptr, JS::NullPtr(), JS::NullPtr())); | |
| 60 #ifdef JSGC_GENERATIONAL | |
| 61 ASSERT_TRUE(js::gc::IsInsideNursery(srt, obj)); | |
| 62 #else | |
| 63 ASSERT_FALSE(js::gc::IsInsideNursery(srt, obj)); | |
| 64 #endif | |
| 65 value = Int32Value(i); | |
| 66 ASSERT_TRUE(JS_SetProperty(cx, obj, property, value)); | |
| 67 array->AppendElement(obj); | |
| 68 } | |
| 69 | |
| 70 /* | |
| 71 * If postbarriers are not working, we will crash here when we try to mark | |
| 72 * objects that have been moved to the tenured heap. | |
| 73 */ | |
| 74 JS_GC(rt); | |
| 75 | |
| 76 /* | |
| 77 * Sanity check that our array contains what we expect. | |
| 78 */ | |
| 79 for (size_t i = 0; i < ElementCount; ++i) { | |
| 80 RootedObject obj(cx, array->ElementAt(i)); | |
| 81 ASSERT_FALSE(js::gc::IsInsideNursery(srt, obj)); | |
| 82 ASSERT_TRUE(JS_GetProperty(cx, obj, property, &value)); | |
| 83 ASSERT_TRUE(value.isInt32()); | |
| 84 ASSERT_EQ(static_cast<int32_t>(i), value.toInt32()); | |
| 85 } | |
| 86 | |
| 87 JS_RemoveExtraGCRootsTracer(rt, TraceArray<ArrayT>, array); | |
| 88 } | |
| 89 | |
| 90 static void | |
| 91 CreateGlobalAndRunTest(JSRuntime* rt, JSContext* cx) | |
| 92 { | |
| 93 static const JSClass GlobalClass = { | |
| 94 "global", JSCLASS_GLOBAL_FLAGS, | |
| 95 JS_PropertyStub, JS_DeletePropertyStub, JS_PropertyStub, JS_StrictPropertyStub, | |
| 96 JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, | |
| 97 nullptr, nullptr, nullptr, nullptr, | |
| 98 JS_GlobalObjectTraceHook | |
| 99 }; | |
| 100 | |
| 101 JS::CompartmentOptions options; | |
| 102 options.setVersion(JSVERSION_LATEST); | |
| 103 JS::PersistentRootedObject global(cx); | |
| 104 global = JS_NewGlobalObject(cx, &GlobalClass, nullptr, JS::FireOnNewGlobalHook, options); | |
| 105 ASSERT_TRUE(global != nullptr); | |
| 106 | |
| 107 JSCompartment *oldCompartment = JS_EnterCompartment(cx, global); | |
| 108 | |
| 109 typedef Heap<JSObject*> ElementT; | |
| 110 | |
| 111 { | |
| 112 nsTArray<ElementT>* array = new nsTArray<ElementT>(InitialElements); | |
| 113 RunTest(rt, cx, array); | |
| 114 delete array; | |
| 115 } | |
| 116 | |
| 117 { | |
| 118 FallibleTArray<ElementT>* array = new FallibleTArray<ElementT>(InitialElements); | |
| 119 RunTest(rt, cx, array); | |
| 120 delete array; | |
| 121 } | |
| 122 | |
| 123 { | |
| 124 nsAutoTArray<ElementT, InitialElements> array; | |
| 125 RunTest(rt, cx, &array); | |
| 126 } | |
| 127 | |
| 128 { | |
| 129 AutoFallibleTArray<ElementT, InitialElements> array; | |
| 130 RunTest(rt, cx, &array); | |
| 131 } | |
| 132 | |
| 133 JS_LeaveCompartment(cx, oldCompartment); | |
| 134 } | |
| 135 | |
| 136 TEST(GCPostBarriers, nsTArray) { | |
| 137 CycleCollectedJSRuntime* ccrt = CycleCollectedJSRuntime::Get(); | |
| 138 ASSERT_TRUE(ccrt != nullptr); | |
| 139 JSRuntime* rt = ccrt->Runtime(); | |
| 140 ASSERT_TRUE(rt != nullptr); | |
| 141 | |
| 142 JSContext *cx = JS_NewContext(rt, 8192); | |
| 143 ASSERT_TRUE(cx != nullptr); | |
| 144 JS_BeginRequest(cx); | |
| 145 | |
| 146 CreateGlobalAndRunTest(rt, cx); | |
| 147 | |
| 148 JS_EndRequest(cx); | |
| 149 JS_DestroyContext(cx); | |
| 150 } |
