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/*
* Copyright (C) 2016 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 "class_table-inl.h"
#include "art_field-inl.h"
#include "art_method-inl.h"
#include "class_linker-inl.h"
#include "common_runtime_test.h"
#include "dex/dex_file.h"
#include "gc/accounting/card_table-inl.h"
#include "gc/heap.h"
#include "handle_scope-inl.h"
#include "mirror/class-alloc-inl.h"
#include "obj_ptr.h"
#include "scoped_thread_state_change-inl.h"
namespace art {
namespace mirror {
class CollectRootVisitor {
public:
CollectRootVisitor() {}
template <class MirrorType>
ALWAYS_INLINE void VisitRootIfNonNull(GcRoot<MirrorType>& root) const
REQUIRES_SHARED(Locks::mutator_lock_) {
if (!root.IsNull()) {
VisitRoot(root);
}
}
template <class MirrorType>
ALWAYS_INLINE void VisitRootIfNonNull(mirror::CompressedReference<MirrorType>* root) const
REQUIRES_SHARED(Locks::mutator_lock_) {
if (!root->IsNull()) {
VisitRoot(root);
}
}
template <class MirrorType>
void VisitRoot(GcRoot<MirrorType>& root) const REQUIRES_SHARED(Locks::mutator_lock_) {
VisitRoot(root.AddressWithoutBarrier());
}
template <class MirrorType>
void VisitRoot(mirror::CompressedReference<MirrorType>* root) const
REQUIRES_SHARED(Locks::mutator_lock_) {
roots_.insert(root->AsMirrorPtr());
}
mutable std::set<mirror::Object*> roots_;
};
class ClassTableTest : public CommonRuntimeTest {};
TEST_F(ClassTableTest, ClassTable) {
ScopedObjectAccess soa(Thread::Current());
jobject jclass_loader = LoadDex("XandY");
VariableSizedHandleScope hs(soa.Self());
Handle<ClassLoader> class_loader(hs.NewHandle(soa.Decode<ClassLoader>(jclass_loader)));
const char* descriptor_x = "LX;";
const char* descriptor_y = "LY;";
Handle<mirror::Class> h_X(
hs.NewHandle(class_linker_->FindClass(soa.Self(), descriptor_x, class_loader)));
Handle<mirror::Class> h_Y(
hs.NewHandle(class_linker_->FindClass(soa.Self(), descriptor_y, class_loader)));
Handle<mirror::Object> obj_X = hs.NewHandle(h_X->AllocObject(soa.Self()));
ASSERT_TRUE(obj_X != nullptr);
ClassTable table;
EXPECT_EQ(table.NumZygoteClasses(class_loader.Get()), 0u);
EXPECT_EQ(table.NumNonZygoteClasses(class_loader.Get()), 0u);
// Add h_X to the class table.
table.Insert(h_X.Get());
EXPECT_OBJ_PTR_EQ(table.LookupByDescriptor(h_X.Get()), h_X.Get());
EXPECT_OBJ_PTR_EQ(table.Lookup(descriptor_x, ComputeModifiedUtf8Hash(descriptor_x)), h_X.Get());
EXPECT_TRUE(table.Lookup("NOT_THERE", ComputeModifiedUtf8Hash("NOT_THERE")) == nullptr);
EXPECT_EQ(table.NumZygoteClasses(class_loader.Get()), 0u);
EXPECT_EQ(table.NumNonZygoteClasses(class_loader.Get()), 1u);
// Create the zygote snapshot and ensure the accounting is correct.
table.FreezeSnapshot();
EXPECT_EQ(table.NumZygoteClasses(class_loader.Get()), 1u);
EXPECT_EQ(table.NumNonZygoteClasses(class_loader.Get()), 0u);
// Test inserting and related lookup functions.
EXPECT_TRUE(table.LookupByDescriptor(h_Y.Get()) == nullptr);
EXPECT_FALSE(table.Contains(h_Y.Get()));
table.Insert(h_Y.Get());
EXPECT_OBJ_PTR_EQ(table.LookupByDescriptor(h_X.Get()), h_X.Get());
EXPECT_OBJ_PTR_EQ(table.LookupByDescriptor(h_Y.Get()), h_Y.Get());
EXPECT_TRUE(table.Contains(h_X.Get()));
EXPECT_TRUE(table.Contains(h_Y.Get()));
EXPECT_EQ(table.NumZygoteClasses(class_loader.Get()), 1u);
EXPECT_EQ(table.NumNonZygoteClasses(class_loader.Get()), 1u);
// Test adding / clearing strong roots.
EXPECT_TRUE(table.InsertStrongRoot(obj_X.Get()));
EXPECT_FALSE(table.InsertStrongRoot(obj_X.Get()));
table.ClearStrongRoots();
EXPECT_TRUE(table.InsertStrongRoot(obj_X.Get()));
// Collect all the roots and make sure there is nothing missing.
CollectRootVisitor roots;
table.VisitRoots(roots);
EXPECT_TRUE(roots.roots_.find(h_X.Get()) != roots.roots_.end());
EXPECT_TRUE(roots.roots_.find(h_Y.Get()) != roots.roots_.end());
EXPECT_TRUE(roots.roots_.find(obj_X.Get()) != roots.roots_.end());
// Checks that vising only classes works.
std::set<mirror::Class*> classes;
table.Visit([&classes](ObjPtr<mirror::Class> klass) REQUIRES_SHARED(Locks::mutator_lock_) {
classes.insert(klass.Ptr());
return true;
});
EXPECT_TRUE(classes.find(h_X.Get()) != classes.end());
EXPECT_TRUE(classes.find(h_Y.Get()) != classes.end());
EXPECT_EQ(classes.size(), 2u);
classes.clear();
table.Visit([&classes](ObjPtr<mirror::Class> klass) REQUIRES_SHARED(Locks::mutator_lock_) {
classes.insert(klass.Ptr());
// Return false to exit the Visit early.
return false;
});
EXPECT_EQ(classes.size(), 1u);
// Test remove.
table.Remove(descriptor_x);
EXPECT_FALSE(table.Contains(h_X.Get()));
// Test that WriteToMemory and ReadFromMemory work.
table.Insert(h_X.Get());
const size_t count = table.WriteToMemory(nullptr);
std::unique_ptr<uint8_t[]> buffer(new uint8_t[count]());
ASSERT_EQ(table.WriteToMemory(&buffer[0]), count);
ClassTable table2;
size_t count2 = table2.ReadFromMemory(&buffer[0]);
EXPECT_EQ(count, count2);
// Strong roots are not serialized, only classes.
EXPECT_TRUE(table2.Contains(h_X.Get()));
EXPECT_TRUE(table2.Contains(h_Y.Get()));
// TODO: Add tests for UpdateClass, InsertOatFile.
}
} // namespace mirror
} // namespace art
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