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// Copyright 2014 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "src/execution/isolate.h"
#include "src/heap/factory.h"
#include "src/heap/heap-inl.h"
#include "src/objects/objects-inl.h"
#include "test/cctest/cctest.h"
namespace v8 {
namespace internal {
static void SetUpNewSpaceWithPoisonedMementoAtTop() {
Isolate* isolate = CcTest::i_isolate();
Heap* heap = isolate->heap();
NewSpace* new_space = heap->new_space();
// Make sure we can allocate some objects without causing a GC later.
CcTest::CollectAllGarbage();
// Allocate a string, the GC may suspect a memento behind the string.
Handle<SeqOneByteString> string =
isolate->factory()->NewRawOneByteString(12).ToHandleChecked();
CHECK(!string->is_null());
// Create an allocation memento behind the string with a garbage allocation
// site pointer.
AllocationMemento memento = AllocationMemento::unchecked_cast(
Object(new_space->top() + kHeapObjectTag));
memento.set_map_after_allocation(ReadOnlyRoots(heap).allocation_memento_map(),
SKIP_WRITE_BARRIER);
memento.set_allocation_site(
AllocationSite::unchecked_cast(Object(kHeapObjectTag)),
SKIP_WRITE_BARRIER);
}
TEST(Regress340063) {
CcTest::InitializeVM();
if (!i::FLAG_allocation_site_pretenuring) return;
v8::HandleScope scope(CcTest::isolate());
SetUpNewSpaceWithPoisonedMementoAtTop();
// Call GC to see if we can handle a poisonous memento right after the
// current new space top pointer.
CcTest::PreciseCollectAllGarbage();
}
TEST(Regress470390) {
CcTest::InitializeVM();
if (!i::FLAG_allocation_site_pretenuring) return;
v8::HandleScope scope(CcTest::isolate());
SetUpNewSpaceWithPoisonedMementoAtTop();
// Set the new space limit to be equal to the top.
Address top = CcTest::i_isolate()->heap()->new_space()->top();
*(CcTest::i_isolate()->heap()->new_space()->allocation_limit_address()) = top;
// Call GC to see if we can handle a poisonous memento right after the
// current new space top pointer.
CcTest::PreciseCollectAllGarbage();
}
TEST(BadMementoAfterTopForceScavenge) {
CcTest::InitializeVM();
if (!i::FLAG_allocation_site_pretenuring) return;
v8::HandleScope scope(CcTest::isolate());
SetUpNewSpaceWithPoisonedMementoAtTop();
// Force GC to test the poisoned memento handling
CcTest::CollectGarbage(i::NEW_SPACE);
}
} // namespace internal
} // namespace v8
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