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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
*/
/* 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/. */
#include "gc/Barrier.h"
#include "jsapi-tests/tests.h"
using namespace JS;
using namespace js;
struct AutoIgnoreRootingHazards {
// Force a nontrivial destructor so the compiler sees the whole RAII scope
static volatile int depth;
AutoIgnoreRootingHazards() { depth++; }
~AutoIgnoreRootingHazards() { depth--; }
} JS_HAZ_GC_SUPPRESSED;
volatile int AutoIgnoreRootingHazards::depth = 0;
BEGIN_TEST(testGCStoreBufferRemoval)
{
// Sanity check - objects start in the nursery and then become tenured.
JS_GC(cx);
JS::RootedObject obj(cx, NurseryObject());
CHECK(js::gc::IsInsideNursery(obj.get()));
JS_GC(cx);
CHECK(!js::gc::IsInsideNursery(obj.get()));
JS::RootedObject tenuredObject(cx, obj);
// Hide the horrors herein from the static rooting analysis.
AutoIgnoreRootingHazards ignore;
// Test removal of store buffer entries added by HeapPtr<T>.
{
JSObject* badObject = reinterpret_cast<JSObject*>(1);
JSObject* punnedPtr = nullptr;
HeapPtr<JSObject*>* relocPtr =
reinterpret_cast<HeapPtr<JSObject*>*>(&punnedPtr);
new (relocPtr) HeapPtr<JSObject*>;
*relocPtr = NurseryObject();
relocPtr->~HeapPtr<JSObject*>();
punnedPtr = badObject;
JS_GC(cx);
new (relocPtr) HeapPtr<JSObject*>;
*relocPtr = NurseryObject();
*relocPtr = tenuredObject;
relocPtr->~HeapPtr<JSObject*>();
punnedPtr = badObject;
JS_GC(cx);
new (relocPtr) HeapPtr<JSObject*>;
*relocPtr = NurseryObject();
*relocPtr = nullptr;
relocPtr->~HeapPtr<JSObject*>();
punnedPtr = badObject;
JS_GC(cx);
}
// Test removal of store buffer entries added by HeapPtr<Value>.
{
Value punnedValue;
HeapPtr<Value>* relocValue = reinterpret_cast<HeapPtr<Value>*>(&punnedValue);
new (relocValue) HeapPtr<Value>;
*relocValue = ObjectValue(*NurseryObject());
relocValue->~HeapPtr<Value>();
punnedValue = ObjectValueCrashOnTouch();
JS_GC(cx);
new (relocValue) HeapPtr<Value>;
*relocValue = ObjectValue(*NurseryObject());
*relocValue = ObjectValue(*tenuredObject);
relocValue->~HeapPtr<Value>();
punnedValue = ObjectValueCrashOnTouch();
JS_GC(cx);
new (relocValue) HeapPtr<Value>;
*relocValue = ObjectValue(*NurseryObject());
*relocValue = NullValue();
relocValue->~HeapPtr<Value>();
punnedValue = ObjectValueCrashOnTouch();
JS_GC(cx);
}
// Test removal of store buffer entries added by Heap<T>.
{
JSObject* badObject = reinterpret_cast<JSObject*>(1);
JSObject* punnedPtr = nullptr;
Heap<JSObject*>* heapPtr =
reinterpret_cast<Heap<JSObject*>*>(&punnedPtr);
new (heapPtr) Heap<JSObject*>;
*heapPtr = NurseryObject();
heapPtr->~Heap<JSObject*>();
punnedPtr = badObject;
JS_GC(cx);
new (heapPtr) Heap<JSObject*>;
*heapPtr = NurseryObject();
*heapPtr = tenuredObject;
heapPtr->~Heap<JSObject*>();
punnedPtr = badObject;
JS_GC(cx);
new (heapPtr) Heap<JSObject*>;
*heapPtr = NurseryObject();
*heapPtr = nullptr;
heapPtr->~Heap<JSObject*>();
punnedPtr = badObject;
JS_GC(cx);
}
return true;
}
JSObject* NurseryObject()
{
return JS_NewPlainObject(cx);
}
END_TEST(testGCStoreBufferRemoval)
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