Quelle testGCStoreBufferRemoval.cpp Sprache: 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/. */

#include "gc/Barrier.h"
#include "js/GCAPI.h"
#include "jsapi-tests/tests.h"

using namespace JS;
using namespace js;

// Name this constant without creating a GC hazard.
#define BAD_OBJECT_PTR reinterpret_cast<JSObject*>(1)

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);

  // Test removal of store buffer entries added by HeapPtr<T>.
  {
    JSObject* punnedPtr = nullptr;
    HeapPtr<JSObject*>* relocPtr =
        reinterpret_cast<HeapPtr<JSObject*>*>(&punnedPtr);
    new (relocPtr) HeapPtr<JSObject*>;
    *relocPtr = NurseryObject();
    relocPtr->~HeapPtr<JSObject*>();
    punnedPtr = BAD_OBJECT_PTR;
    JS_GC(cx);

    new (relocPtr) HeapPtr<JSObject*>;
    *relocPtr = NurseryObject();
    *relocPtr = tenuredObject;
    relocPtr->~HeapPtr<JSObject*>();
    punnedPtr = BAD_OBJECT_PTR;
    JS_GC(cx);

    new (relocPtr) HeapPtr<JSObject*>;
    *relocPtr = NurseryObject();
    *relocPtr = nullptr;
    relocPtr->~HeapPtr<JSObject*>();
    punnedPtr = BAD_OBJECT_PTR;
    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 = js::PoisonedObjectValue(0x48);
    JS_GC(cx);

    new (relocValue) HeapPtr<Value>;
    *relocValue = ObjectValue(*NurseryObject());
    *relocValue = ObjectValue(*tenuredObject);
    relocValue->~HeapPtr<Value>();
    punnedValue = js::PoisonedObjectValue(0x48);
    JS_GC(cx);

    new (relocValue) HeapPtr<Value>;
    *relocValue = ObjectValue(*NurseryObject());
    *relocValue = NullValue();
    relocValue->~HeapPtr<Value>();
    punnedValue = js::PoisonedObjectValue(0x48);
    JS_GC(cx);
  }

  // Test removal of store buffer entries added by Heap<T>.
  {
    JSObject* punnedPtr = nullptr;
    JS::Heap<JSObject*>* heapPtr =
        reinterpret_cast<JS::Heap<JSObject*>*>(&punnedPtr);
    new (heapPtr) JS::Heap<JSObject*>;
    *heapPtr = NurseryObject();
    heapPtr->~Heap<JSObject*>();
    punnedPtr = BAD_OBJECT_PTR;
    JS_GC(cx);

    new (heapPtr) JS::Heap<JSObject*>;
    *heapPtr = NurseryObject();
    *heapPtr = tenuredObject;
    heapPtr->~Heap<JSObject*>();
    punnedPtr = BAD_OBJECT_PTR;
    JS_GC(cx);

    new (heapPtr) JS::Heap<JSObject*>;
    *heapPtr = NurseryObject();
    *heapPtr = nullptr;
    heapPtr->~Heap<JSObject*>();
    punnedPtr = BAD_OBJECT_PTR;
    JS_GC(cx);
  }

  return true;
}

JSObject* NurseryObject() { return JS_NewPlainObject(cx); }
END_TEST(testGCStoreBufferRemoval)

#undef BAD_OBJECT_PTR

quality100%

¤ Dauer der Verarbeitung: 0.14 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.