v8/test/cctest/test-global-handles.cc

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// Copyright 2013 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 "global-handles.h"
#include "cctest.h"
using namespace v8::internal;
using v8::UniqueId;
static List<Object*> skippable_objects;
static List<Object*> can_skip_called_objects;
static bool CanSkipCallback(Heap* heap, Object** pointer) {
can_skip_called_objects.Add(*pointer);
return skippable_objects.Contains(*pointer);
}
static void ResetCanSkipData() {
skippable_objects.Clear();
can_skip_called_objects.Clear();
}
class TestRetainedObjectInfo : public v8::RetainedObjectInfo {
public:
TestRetainedObjectInfo() : has_been_disposed_(false) {}
bool has_been_disposed() { return has_been_disposed_; }
virtual void Dispose() {
ASSERT(!has_been_disposed_);
has_been_disposed_ = true;
}
virtual bool IsEquivalent(v8::RetainedObjectInfo* other) {
return other == this;
}
virtual intptr_t GetHash() { return 0; }
virtual const char* GetLabel() { return "whatever"; }
private:
bool has_been_disposed_;
};
class TestObjectVisitor : public ObjectVisitor {
public:
virtual void VisitPointers(Object** start, Object** end) {
for (Object** o = start; o != end; ++o)
visited.Add(*o);
}
List<Object*> visited;
};
TEST(IterateObjectGroupsOldApi) {
CcTest::InitializeVM();
GlobalHandles* global_handles = Isolate::Current()->global_handles();
v8::HandleScope handle_scope(CcTest::isolate());
Handle<Object> g1s1 =
global_handles->Create(HEAP->AllocateFixedArray(1)->ToObjectChecked());
Handle<Object> g1s2 =
global_handles->Create(HEAP->AllocateFixedArray(1)->ToObjectChecked());
Handle<Object> g2s1 =
global_handles->Create(HEAP->AllocateFixedArray(1)->ToObjectChecked());
Handle<Object> g2s2 =
global_handles->Create(HEAP->AllocateFixedArray(1)->ToObjectChecked());
TestRetainedObjectInfo info1;
TestRetainedObjectInfo info2;
{
Object** g1_objects[] = { g1s1.location(), g1s2.location() };
Object** g2_objects[] = { g2s1.location(), g2s2.location() };
global_handles->AddObjectGroup(g1_objects, 2, &info1);
global_handles->AddObjectGroup(g2_objects, 2, &info2);
}
// Iterate the object groups. First skip all.
{
ResetCanSkipData();
skippable_objects.Add(*g1s1.location());
skippable_objects.Add(*g1s2.location());
skippable_objects.Add(*g2s1.location());
skippable_objects.Add(*g2s2.location());
TestObjectVisitor visitor;
global_handles->IterateObjectGroups(&visitor, &CanSkipCallback);
// CanSkipCallback was called for all objects.
ASSERT(can_skip_called_objects.length() == 4);
ASSERT(can_skip_called_objects.Contains(*g1s1.location()));
ASSERT(can_skip_called_objects.Contains(*g1s2.location()));
ASSERT(can_skip_called_objects.Contains(*g2s1.location()));
ASSERT(can_skip_called_objects.Contains(*g2s2.location()));
// Nothing was visited.
ASSERT(visitor.visited.length() == 0);
ASSERT(!info1.has_been_disposed());
ASSERT(!info2.has_been_disposed());
}
// Iterate again, now only skip the second object group.
{
ResetCanSkipData();
// The first grough should still be visited, since only one object is
// skipped.
skippable_objects.Add(*g1s1.location());
skippable_objects.Add(*g2s1.location());
skippable_objects.Add(*g2s2.location());
TestObjectVisitor visitor;
global_handles->IterateObjectGroups(&visitor, &CanSkipCallback);
// CanSkipCallback was called for all objects.
ASSERT(can_skip_called_objects.length() == 3 ||
can_skip_called_objects.length() == 4);
ASSERT(can_skip_called_objects.Contains(*g1s2.location()));
ASSERT(can_skip_called_objects.Contains(*g2s1.location()));
ASSERT(can_skip_called_objects.Contains(*g2s2.location()));
// The first group was visited.
ASSERT(visitor.visited.length() == 2);
ASSERT(visitor.visited.Contains(*g1s1.location()));
ASSERT(visitor.visited.Contains(*g1s2.location()));
ASSERT(info1.has_been_disposed());
ASSERT(!info2.has_been_disposed());
}
// Iterate again, don't skip anything.
{
ResetCanSkipData();
TestObjectVisitor visitor;
global_handles->IterateObjectGroups(&visitor, &CanSkipCallback);
// CanSkipCallback was called for all objects.
ASSERT(can_skip_called_objects.length() == 1);
ASSERT(can_skip_called_objects.Contains(*g2s1.location()) ||
can_skip_called_objects.Contains(*g2s2.location()));
// The second group was visited.
ASSERT(visitor.visited.length() == 2);
ASSERT(visitor.visited.Contains(*g2s1.location()));
ASSERT(visitor.visited.Contains(*g2s2.location()));
ASSERT(info2.has_been_disposed());
}
}
TEST(IterateObjectGroups) {
CcTest::InitializeVM();
GlobalHandles* global_handles = Isolate::Current()->global_handles();
v8::HandleScope handle_scope(CcTest::isolate());
Handle<Object> g1s1 =
global_handles->Create(HEAP->AllocateFixedArray(1)->ToObjectChecked());
Handle<Object> g1s2 =
global_handles->Create(HEAP->AllocateFixedArray(1)->ToObjectChecked());
Handle<Object> g2s1 =
global_handles->Create(HEAP->AllocateFixedArray(1)->ToObjectChecked());
Handle<Object> g2s2 =
global_handles->Create(HEAP->AllocateFixedArray(1)->ToObjectChecked());
TestRetainedObjectInfo info1;
TestRetainedObjectInfo info2;
global_handles->SetObjectGroupId(g2s1.location(), UniqueId(2));
global_handles->SetObjectGroupId(g2s2.location(), UniqueId(2));
global_handles->SetRetainedObjectInfo(UniqueId(2), &info2);
global_handles->SetObjectGroupId(g1s1.location(), UniqueId(1));
global_handles->SetObjectGroupId(g1s2.location(), UniqueId(1));
global_handles->SetRetainedObjectInfo(UniqueId(1), &info1);
// Iterate the object groups. First skip all.
{
ResetCanSkipData();
skippable_objects.Add(*g1s1.location());
skippable_objects.Add(*g1s2.location());
skippable_objects.Add(*g2s1.location());
skippable_objects.Add(*g2s2.location());
TestObjectVisitor visitor;
global_handles->IterateObjectGroups(&visitor, &CanSkipCallback);
// CanSkipCallback was called for all objects.
ASSERT(can_skip_called_objects.length() == 4);
ASSERT(can_skip_called_objects.Contains(*g1s1.location()));
ASSERT(can_skip_called_objects.Contains(*g1s2.location()));
ASSERT(can_skip_called_objects.Contains(*g2s1.location()));
ASSERT(can_skip_called_objects.Contains(*g2s2.location()));
// Nothing was visited.
ASSERT(visitor.visited.length() == 0);
ASSERT(!info1.has_been_disposed());
ASSERT(!info2.has_been_disposed());
}
// Iterate again, now only skip the second object group.
{
ResetCanSkipData();
// The first grough should still be visited, since only one object is
// skipped.
skippable_objects.Add(*g1s1.location());
skippable_objects.Add(*g2s1.location());
skippable_objects.Add(*g2s2.location());
TestObjectVisitor visitor;
global_handles->IterateObjectGroups(&visitor, &CanSkipCallback);
// CanSkipCallback was called for all objects.
ASSERT(can_skip_called_objects.length() == 3 ||
can_skip_called_objects.length() == 4);
ASSERT(can_skip_called_objects.Contains(*g1s2.location()));
ASSERT(can_skip_called_objects.Contains(*g2s1.location()));
ASSERT(can_skip_called_objects.Contains(*g2s2.location()));
// The first group was visited.
ASSERT(visitor.visited.length() == 2);
ASSERT(visitor.visited.Contains(*g1s1.location()));
ASSERT(visitor.visited.Contains(*g1s2.location()));
ASSERT(info1.has_been_disposed());
ASSERT(!info2.has_been_disposed());
}
// Iterate again, don't skip anything.
{
ResetCanSkipData();
TestObjectVisitor visitor;
global_handles->IterateObjectGroups(&visitor, &CanSkipCallback);
// CanSkipCallback was called for all objects.
ASSERT(can_skip_called_objects.length() == 1);
ASSERT(can_skip_called_objects.Contains(*g2s1.location()) ||
can_skip_called_objects.Contains(*g2s2.location()));
// The second group was visited.
ASSERT(visitor.visited.length() == 2);
ASSERT(visitor.visited.Contains(*g2s1.location()));
ASSERT(visitor.visited.Contains(*g2s2.location()));
ASSERT(info2.has_been_disposed());
}
}
TEST(ImplicitReferences) {
CcTest::InitializeVM();
GlobalHandles* global_handles = Isolate::Current()->global_handles();
v8::HandleScope handle_scope(CcTest::isolate());
Handle<Object> g1s1 =
global_handles->Create(HEAP->AllocateFixedArray(1)->ToObjectChecked());
Handle<Object> g1c1 =
global_handles->Create(HEAP->AllocateFixedArray(1)->ToObjectChecked());
Handle<Object> g1c2 =
global_handles->Create(HEAP->AllocateFixedArray(1)->ToObjectChecked());
Handle<Object> g2s1 =
global_handles->Create(HEAP->AllocateFixedArray(1)->ToObjectChecked());
Handle<Object> g2s2 =
global_handles->Create(HEAP->AllocateFixedArray(1)->ToObjectChecked());
Handle<Object> g2c1 =
global_handles->Create(HEAP->AllocateFixedArray(1)->ToObjectChecked());
global_handles->SetObjectGroupId(g1s1.location(), UniqueId(1));
global_handles->SetObjectGroupId(g2s1.location(), UniqueId(2));
global_handles->SetObjectGroupId(g2s2.location(), UniqueId(2));
global_handles->SetReferenceFromGroup(UniqueId(1), g1c1.location());
global_handles->SetReferenceFromGroup(UniqueId(1), g1c2.location());
global_handles->SetReferenceFromGroup(UniqueId(2), g2c1.location());
List<ImplicitRefGroup*>* implicit_refs =
global_handles->implicit_ref_groups();
USE(implicit_refs);
ASSERT(implicit_refs->length() == 2);
ASSERT(implicit_refs->at(0)->parent ==
reinterpret_cast<HeapObject**>(g1s1.location()));
ASSERT(implicit_refs->at(0)->length == 2);
ASSERT(implicit_refs->at(0)->children[0] == g1c1.location());
ASSERT(implicit_refs->at(0)->children[1] == g1c2.location());
ASSERT(implicit_refs->at(1)->parent ==
reinterpret_cast<HeapObject**>(g2s1.location()));
ASSERT(implicit_refs->at(1)->length == 1);
ASSERT(implicit_refs->at(1)->children[0] == g2c1.location());
}