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// Copyright 2020 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "include/cppgc/prefinalizer.h"
#include "include/cppgc/allocation.h"
#include "include/cppgc/garbage-collected.h"
#include "include/cppgc/persistent.h"
#include "src/heap/cppgc/heap-object-header.h"
#include "src/heap/cppgc/heap.h"
#include "test/unittests/heap/cppgc/tests.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace cppgc {
namespace internal {
namespace {
class PrefinalizerTest : public testing::TestWithHeap {};
class GCed : public GarbageCollected<GCed> {
CPPGC_USING_PRE_FINALIZER(GCed, PreFinalizer);
public:
void Trace(Visitor*) const {}
void PreFinalizer() { ++prefinalizer_callcount; }
static size_t prefinalizer_callcount;
};
size_t GCed::prefinalizer_callcount = 0;
} // namespace
TEST_F(PrefinalizerTest, PrefinalizerCalledOnDeadObject) {
GCed::prefinalizer_callcount = 0;
auto* object = MakeGarbageCollected<GCed>(GetAllocationHandle());
USE(object);
EXPECT_EQ(0u, GCed::prefinalizer_callcount);
PreciseGC();
EXPECT_EQ(1u, GCed::prefinalizer_callcount);
PreciseGC();
EXPECT_EQ(1u, GCed::prefinalizer_callcount);
}
TEST_F(PrefinalizerTest, PrefinalizerNotCalledOnLiveObject) {
GCed::prefinalizer_callcount = 0;
{
Persistent<GCed> object = MakeGarbageCollected<GCed>(GetAllocationHandle());
EXPECT_EQ(0u, GCed::prefinalizer_callcount);
PreciseGC();
EXPECT_EQ(0u, GCed::prefinalizer_callcount);
}
PreciseGC();
EXPECT_EQ(1u, GCed::prefinalizer_callcount);
}
namespace {
class Mixin : public GarbageCollectedMixin {
CPPGC_USING_PRE_FINALIZER(Mixin, PreFinalizer);
public:
void PreFinalizer() { ++prefinalizer_callcount; }
static size_t prefinalizer_callcount;
};
size_t Mixin::prefinalizer_callcount = 0;
class GCedWithMixin : public GarbageCollected<GCedWithMixin>, public Mixin {};
} // namespace
TEST_F(PrefinalizerTest, PrefinalizerCalledOnDeadMixinObject) {
Mixin::prefinalizer_callcount = 0;
auto* object = MakeGarbageCollected<GCedWithMixin>(GetAllocationHandle());
USE(object);
EXPECT_EQ(0u, Mixin::prefinalizer_callcount);
PreciseGC();
EXPECT_EQ(1u, Mixin::prefinalizer_callcount);
PreciseGC();
EXPECT_EQ(1u, Mixin::prefinalizer_callcount);
}
TEST_F(PrefinalizerTest, PrefinalizerNotCalledOnLiveMixinObject) {
Mixin::prefinalizer_callcount = 0;
{
Persistent<GCedWithMixin> object =
MakeGarbageCollected<GCedWithMixin>(GetAllocationHandle());
EXPECT_EQ(0u, Mixin::prefinalizer_callcount);
PreciseGC();
EXPECT_EQ(0u, Mixin::prefinalizer_callcount);
}
PreciseGC();
EXPECT_EQ(1u, Mixin::prefinalizer_callcount);
}
namespace {
class BaseMixin : public GarbageCollectedMixin {
CPPGC_USING_PRE_FINALIZER(BaseMixin, PreFinalizer);
public:
void PreFinalizer();
static size_t prefinalizer_callcount;
};
size_t BaseMixin::prefinalizer_callcount = 0;
class InheritingMixin : public BaseMixin {
CPPGC_USING_PRE_FINALIZER(InheritingMixin, PreFinalizer);
public:
void PreFinalizer();
static size_t prefinalizer_callcount;
};
size_t InheritingMixin::prefinalizer_callcount = 0;
class GCedWithMixins : public GarbageCollected<GCedWithMixins>,
public InheritingMixin {
CPPGC_USING_PRE_FINALIZER(GCedWithMixins, PreFinalizer);
public:
void PreFinalizer();
static size_t prefinalizer_callcount;
};
size_t GCedWithMixins::prefinalizer_callcount = 0;
void BaseMixin::PreFinalizer() {
EXPECT_EQ(1u, GCedWithMixins::prefinalizer_callcount);
EXPECT_EQ(1u, InheritingMixin::prefinalizer_callcount);
EXPECT_EQ(0u, BaseMixin::prefinalizer_callcount);
++BaseMixin::prefinalizer_callcount;
}
void InheritingMixin::PreFinalizer() {
EXPECT_EQ(1u, GCedWithMixins::prefinalizer_callcount);
EXPECT_EQ(0u, InheritingMixin::prefinalizer_callcount);
EXPECT_EQ(0u, BaseMixin::prefinalizer_callcount);
InheritingMixin::prefinalizer_callcount = true;
}
void GCedWithMixins::PreFinalizer() {
EXPECT_EQ(0u, GCedWithMixins::prefinalizer_callcount);
EXPECT_EQ(0u, InheritingMixin::prefinalizer_callcount);
EXPECT_EQ(0u, BaseMixin::prefinalizer_callcount);
GCedWithMixins::prefinalizer_callcount = true;
}
} // namespace
TEST_F(PrefinalizerTest, PrefinalizerInvocationPreservesOrder) {
BaseMixin::prefinalizer_callcount = 0;
InheritingMixin::prefinalizer_callcount = 0;
GCedWithMixins::prefinalizer_callcount = 0;
auto* object = MakeGarbageCollected<GCedWithMixins>(GetAllocationHandle());
USE(object);
EXPECT_EQ(0u, GCedWithMixins::prefinalizer_callcount);
EXPECT_EQ(0u, InheritingMixin::prefinalizer_callcount);
EXPECT_EQ(0u, BaseMixin::prefinalizer_callcount);
PreciseGC();
EXPECT_EQ(1u, GCedWithMixins::prefinalizer_callcount);
EXPECT_EQ(1u, InheritingMixin::prefinalizer_callcount);
EXPECT_EQ(1u, BaseMixin::prefinalizer_callcount);
PreciseGC();
EXPECT_EQ(1u, GCedWithMixins::prefinalizer_callcount);
EXPECT_EQ(1u, InheritingMixin::prefinalizer_callcount);
EXPECT_EQ(1u, BaseMixin::prefinalizer_callcount);
}
namespace {
class AllocatingPrefinalizer : public GarbageCollected<AllocatingPrefinalizer> {
CPPGC_USING_PRE_FINALIZER(AllocatingPrefinalizer, PreFinalizer);
public:
explicit AllocatingPrefinalizer(cppgc::Heap* heap) : heap_(heap) {}
void Trace(Visitor*) const {}
void PreFinalizer() {
MakeGarbageCollected<GCed>(heap_->GetAllocationHandle());
}
private:
cppgc::Heap* heap_;
};
} // namespace
#ifdef DEBUG
TEST_F(PrefinalizerTest, PrefinalizerFailsOnAllcoation) {
auto* object = MakeGarbageCollected<AllocatingPrefinalizer>(
GetAllocationHandle(), GetHeap());
USE(object);
EXPECT_DEATH_IF_SUPPORTED(PreciseGC(), "");
}
#endif // DEBUG
} // namespace internal
} // namespace cppgc
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