You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
271 lines
10 KiB
271 lines
10 KiB
/*
|
|
* Copyright (C) 2015 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include "mod_union_table-inl.h"
|
|
|
|
#include "class_linker-inl.h"
|
|
#include "class_root-inl.h"
|
|
#include "common_runtime_test.h"
|
|
#include "gc/space/space-inl.h"
|
|
#include "mirror/array-alloc-inl.h"
|
|
#include "mirror/array-inl.h"
|
|
#include "space_bitmap-inl.h"
|
|
#include "thread-current-inl.h"
|
|
#include "thread_list.h"
|
|
|
|
namespace art {
|
|
namespace gc {
|
|
namespace accounting {
|
|
|
|
class ModUnionTableFactory {
|
|
public:
|
|
enum TableType {
|
|
kTableTypeCardCache,
|
|
kTableTypeReferenceCache,
|
|
kTableTypeCount, // Number of values in the enum.
|
|
};
|
|
|
|
// Target space is ignored for the card cache implementation.
|
|
static ModUnionTable* Create(
|
|
TableType type, space::ContinuousSpace* space, space::ContinuousSpace* target_space);
|
|
};
|
|
|
|
class ModUnionTableTest : public CommonRuntimeTest {
|
|
public:
|
|
ModUnionTableTest() : java_lang_object_array_(nullptr) {
|
|
}
|
|
mirror::ObjectArray<mirror::Object>* AllocObjectArray(
|
|
Thread* self, space::ContinuousMemMapAllocSpace* space, size_t component_count)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
auto* klass = GetObjectArrayClass(self, space);
|
|
const size_t size = mirror::ComputeArraySize(component_count, 2);
|
|
size_t bytes_allocated = 0, bytes_tl_bulk_allocated;
|
|
auto* obj = down_cast<mirror::ObjectArray<mirror::Object>*>(
|
|
space->Alloc(self, size, &bytes_allocated, nullptr, &bytes_tl_bulk_allocated));
|
|
if (obj != nullptr) {
|
|
obj->SetClass(klass);
|
|
obj->SetLength(static_cast<int32_t>(component_count));
|
|
space->GetLiveBitmap()->Set(obj);
|
|
EXPECT_GE(bytes_allocated, size);
|
|
}
|
|
return obj;
|
|
}
|
|
void ResetClass() {
|
|
java_lang_object_array_ = nullptr;
|
|
}
|
|
void RunTest(ModUnionTableFactory::TableType type);
|
|
|
|
private:
|
|
mirror::Class* GetObjectArrayClass(Thread* self, space::ContinuousMemMapAllocSpace* space)
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
if (java_lang_object_array_ == nullptr) {
|
|
java_lang_object_array_ = GetClassRoot<mirror::ObjectArray<mirror::Object>>().Ptr();
|
|
// Since the test doesn't have an image, the class of the object array keeps cards live
|
|
// inside the card cache mod-union table and causes the check
|
|
// ASSERT_FALSE(table->ContainsCardFor(reinterpret_cast<uintptr_t>(obj3)));
|
|
// to fail since the class ends up keeping the card dirty. To get around this, we make a fake
|
|
// copy of the class in the same space that we are allocating in.
|
|
DCHECK(java_lang_object_array_ != nullptr);
|
|
const size_t class_size = java_lang_object_array_->GetClassSize();
|
|
size_t bytes_allocated = 0, bytes_tl_bulk_allocated;
|
|
auto* klass = down_cast<mirror::Class*>(space->Alloc(self, class_size, &bytes_allocated,
|
|
nullptr,
|
|
&bytes_tl_bulk_allocated));
|
|
DCHECK(klass != nullptr);
|
|
memcpy(klass, java_lang_object_array_, class_size);
|
|
Runtime::Current()->GetHeap()->GetCardTable()->MarkCard(klass);
|
|
java_lang_object_array_ = klass;
|
|
}
|
|
return java_lang_object_array_;
|
|
}
|
|
mirror::Class* java_lang_object_array_;
|
|
};
|
|
|
|
// Collect visited objects into container.
|
|
class CollectVisitedVisitor : public MarkObjectVisitor {
|
|
public:
|
|
explicit CollectVisitedVisitor(std::set<mirror::Object*>* out) : out_(out) {}
|
|
void MarkHeapReference(mirror::HeapReference<mirror::Object>* ref,
|
|
bool do_atomic_update ATTRIBUTE_UNUSED) override
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
DCHECK(ref != nullptr);
|
|
MarkObject(ref->AsMirrorPtr());
|
|
}
|
|
mirror::Object* MarkObject(mirror::Object* obj) override
|
|
REQUIRES_SHARED(Locks::mutator_lock_) {
|
|
DCHECK(obj != nullptr);
|
|
out_->insert(obj);
|
|
return obj;
|
|
}
|
|
|
|
private:
|
|
std::set<mirror::Object*>* const out_;
|
|
};
|
|
|
|
// A mod union table that only holds references to a specified target space.
|
|
class ModUnionTableRefCacheToSpace : public ModUnionTableReferenceCache {
|
|
public:
|
|
explicit ModUnionTableRefCacheToSpace(
|
|
const std::string& name, Heap* heap, space::ContinuousSpace* space,
|
|
space::ContinuousSpace* target_space)
|
|
: ModUnionTableReferenceCache(name, heap, space), target_space_(target_space) {}
|
|
|
|
bool ShouldAddReference(const mirror::Object* ref) const override {
|
|
return target_space_->HasAddress(ref);
|
|
}
|
|
|
|
private:
|
|
space::ContinuousSpace* const target_space_;
|
|
};
|
|
|
|
std::ostream& operator<<(std::ostream& oss, ModUnionTableFactory::TableType type) {
|
|
switch (type) {
|
|
case ModUnionTableFactory::kTableTypeCardCache: {
|
|
oss << "CardCache";
|
|
break;
|
|
}
|
|
case ModUnionTableFactory::kTableTypeReferenceCache: {
|
|
oss << "ReferenceCache";
|
|
break;
|
|
}
|
|
default: {
|
|
UNIMPLEMENTED(FATAL) << static_cast<size_t>(type);
|
|
}
|
|
}
|
|
return oss;
|
|
}
|
|
|
|
ModUnionTable* ModUnionTableFactory::Create(
|
|
TableType type, space::ContinuousSpace* space, space::ContinuousSpace* target_space) {
|
|
std::ostringstream name;
|
|
name << "Mod union table: " << type;
|
|
switch (type) {
|
|
case kTableTypeCardCache: {
|
|
return new ModUnionTableCardCache(name.str(), Runtime::Current()->GetHeap(), space);
|
|
}
|
|
case kTableTypeReferenceCache: {
|
|
return new ModUnionTableRefCacheToSpace(name.str(), Runtime::Current()->GetHeap(), space,
|
|
target_space);
|
|
}
|
|
default: {
|
|
UNIMPLEMENTED(FATAL) << "Invalid type " << type;
|
|
UNREACHABLE();
|
|
}
|
|
}
|
|
}
|
|
|
|
TEST_F(ModUnionTableTest, TestCardCache) {
|
|
RunTest(ModUnionTableFactory::kTableTypeCardCache);
|
|
}
|
|
|
|
TEST_F(ModUnionTableTest, TestReferenceCache) {
|
|
RunTest(ModUnionTableFactory::kTableTypeReferenceCache);
|
|
}
|
|
|
|
void ModUnionTableTest::RunTest(ModUnionTableFactory::TableType type) {
|
|
Thread* const self = Thread::Current();
|
|
ScopedObjectAccess soa(self);
|
|
Runtime* const runtime = Runtime::Current();
|
|
gc::Heap* const heap = runtime->GetHeap();
|
|
// Use non moving space since moving GC don't necessarily have a primary free list space.
|
|
auto* space = heap->GetNonMovingSpace();
|
|
ResetClass();
|
|
// Create another space that we can put references in.
|
|
std::unique_ptr<space::DlMallocSpace> other_space(space::DlMallocSpace::Create(
|
|
"other space", 128 * KB, 4 * MB, 4 * MB, /*can_move_objects=*/ false));
|
|
ASSERT_TRUE(other_space.get() != nullptr);
|
|
{
|
|
ScopedThreadSuspension sts(self, kSuspended);
|
|
ScopedSuspendAll ssa("Add image space");
|
|
heap->AddSpace(other_space.get());
|
|
}
|
|
std::unique_ptr<ModUnionTable> table(ModUnionTableFactory::Create(
|
|
type, space, other_space.get()));
|
|
ASSERT_TRUE(table.get() != nullptr);
|
|
// Create some fake objects and put the main space and dirty cards in the non moving space.
|
|
auto* obj1 = AllocObjectArray(self, space, CardTable::kCardSize);
|
|
ASSERT_TRUE(obj1 != nullptr);
|
|
auto* obj2 = AllocObjectArray(self, space, CardTable::kCardSize);
|
|
ASSERT_TRUE(obj2 != nullptr);
|
|
auto* obj3 = AllocObjectArray(self, space, CardTable::kCardSize);
|
|
ASSERT_TRUE(obj3 != nullptr);
|
|
auto* obj4 = AllocObjectArray(self, space, CardTable::kCardSize);
|
|
ASSERT_TRUE(obj4 != nullptr);
|
|
// Dirty some cards.
|
|
obj1->Set(0, obj2);
|
|
obj2->Set(0, obj3);
|
|
obj3->Set(0, obj4);
|
|
obj4->Set(0, obj1);
|
|
// Dirty some more cards to objects in another space.
|
|
auto* other_space_ref1 = AllocObjectArray(self, other_space.get(), CardTable::kCardSize);
|
|
ASSERT_TRUE(other_space_ref1 != nullptr);
|
|
auto* other_space_ref2 = AllocObjectArray(self, other_space.get(), CardTable::kCardSize);
|
|
ASSERT_TRUE(other_space_ref2 != nullptr);
|
|
obj1->Set(1, other_space_ref1);
|
|
obj2->Set(3, other_space_ref2);
|
|
table->ProcessCards();
|
|
std::set<mirror::Object*> visited_before;
|
|
CollectVisitedVisitor collector_before(&visited_before);
|
|
table->UpdateAndMarkReferences(&collector_before);
|
|
// Check that we visited all the references in other spaces only.
|
|
ASSERT_GE(visited_before.size(), 2u);
|
|
ASSERT_TRUE(visited_before.find(other_space_ref1) != visited_before.end());
|
|
ASSERT_TRUE(visited_before.find(other_space_ref2) != visited_before.end());
|
|
// Verify that all the other references were visited.
|
|
// obj1, obj2 cards should still be in mod union table since they have references to other
|
|
// spaces.
|
|
ASSERT_TRUE(table->ContainsCardFor(reinterpret_cast<uintptr_t>(obj1)));
|
|
ASSERT_TRUE(table->ContainsCardFor(reinterpret_cast<uintptr_t>(obj2)));
|
|
// obj3, obj4 don't have a reference to any object in the other space, their cards should have
|
|
// been removed from the mod union table during UpdateAndMarkReferences.
|
|
ASSERT_FALSE(table->ContainsCardFor(reinterpret_cast<uintptr_t>(obj3)));
|
|
ASSERT_FALSE(table->ContainsCardFor(reinterpret_cast<uintptr_t>(obj4)));
|
|
{
|
|
// Currently no-op, make sure it still works however.
|
|
ReaderMutexLock mu(self, *Locks::heap_bitmap_lock_);
|
|
table->Verify();
|
|
}
|
|
// Verify that dump doesn't crash.
|
|
std::ostringstream oss;
|
|
table->Dump(oss);
|
|
// Set all the cards, then verify.
|
|
table->SetCards();
|
|
// TODO: Check that the cards are actually set.
|
|
for (auto* ptr = space->Begin(); ptr < AlignUp(space->End(), CardTable::kCardSize);
|
|
ptr += CardTable::kCardSize) {
|
|
ASSERT_TRUE(table->ContainsCardFor(reinterpret_cast<uintptr_t>(ptr)));
|
|
}
|
|
// Visit again and make sure the cards got cleared back to their expected state.
|
|
std::set<mirror::Object*> visited_after;
|
|
CollectVisitedVisitor collector_after(&visited_after);
|
|
table->UpdateAndMarkReferences(&collector_after);
|
|
// Check that we visited a superset after.
|
|
for (auto* obj : visited_before) {
|
|
ASSERT_TRUE(visited_after.find(obj) != visited_after.end()) << obj;
|
|
}
|
|
// Verify that the dump still works.
|
|
std::ostringstream oss2;
|
|
table->Dump(oss2);
|
|
// Remove the space we added so it doesn't persist to the next test.
|
|
ScopedThreadSuspension sts(self, kSuspended);
|
|
ScopedSuspendAll ssa("Add image space");
|
|
heap->RemoveSpace(other_space.get());
|
|
}
|
|
|
|
} // namespace accounting
|
|
} // namespace gc
|
|
} // namespace art
|