124 lines
4.6 KiB
C++
124 lines
4.6 KiB
C++
/*
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* Copyright (C) 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <type_traits>
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#include "base/enums.h"
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#include "class_linker-inl.h"
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#include "common_runtime_test.h"
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#include "gtest/gtest.h"
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#include "handle.h"
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#include "handle_scope-inl.h"
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#include "mirror/class-alloc-inl.h"
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#include "mirror/class-inl.h"
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#include "mirror/object.h"
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#include "scoped_thread_state_change-inl.h"
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#include "thread.h"
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namespace art {
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// Handles are value objects and should be trivially copyable.
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static_assert(std::is_trivially_copyable<Handle<mirror::Object>>::value,
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"Handle should be trivially copyable");
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static_assert(std::is_trivially_copyable<MutableHandle<mirror::Object>>::value,
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"MutableHandle should be trivially copyable");
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static_assert(std::is_trivially_copyable<ScopedNullHandle<mirror::Object>>::value,
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"ScopedNullHandle should be trivially copyable");
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class HandleScopeTest : public CommonRuntimeTest {};
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// Test the offsets computed for members of HandleScope. Because of cross-compiling
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// it is impossible the use OFFSETOF_MEMBER, so we do some reasonable computations ourselves. This
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// test checks whether we do the right thing.
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TEST_F(HandleScopeTest, Offsets) {
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ScopedObjectAccess soa(Thread::Current());
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ClassLinker* const class_linker = Runtime::Current()->GetClassLinker();
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// As the members of HandleScope are private, we cannot use OFFSETOF_MEMBER
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// here. So do the inverse: set some data, and access it through pointers created from the offsets.
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StackHandleScope<0x1> hs0(soa.Self());
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static const size_t kNumReferences = 0x9ABC;
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StackHandleScope<kNumReferences> test_table(soa.Self());
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ObjPtr<mirror::Class> c = class_linker->FindSystemClass(soa.Self(), "Ljava/lang/Object;");
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test_table.SetReference(0, c.Ptr());
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uint8_t* table_base_ptr = reinterpret_cast<uint8_t*>(&test_table);
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{
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BaseHandleScope** link_ptr = reinterpret_cast<BaseHandleScope**>(table_base_ptr +
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HandleScope::LinkOffset(kRuntimePointerSize));
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EXPECT_EQ(*link_ptr, &hs0);
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}
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{
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uint32_t* num_ptr = reinterpret_cast<uint32_t*>(table_base_ptr +
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HandleScope::NumberOfReferencesOffset(kRuntimePointerSize));
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EXPECT_EQ(*num_ptr, static_cast<size_t>(kNumReferences));
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}
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{
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auto* ref_ptr = reinterpret_cast<StackReference<mirror::Object>*>(table_base_ptr +
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HandleScope::ReferencesOffset(kRuntimePointerSize));
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EXPECT_OBJ_PTR_EQ(ref_ptr->AsMirrorPtr(), c);
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}
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}
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class CollectVisitor {
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public:
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void VisitRootIfNonNull(StackReference<mirror::Object>* ref) {
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if (!ref->IsNull()) {
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visited.insert(ref);
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}
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++total_visited;
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}
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std::set<StackReference<mirror::Object>*> visited;
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size_t total_visited = 0; // including null.
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};
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// Test functionality of variable sized handle scopes.
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TEST_F(HandleScopeTest, VariableSized) {
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ScopedObjectAccess soa(Thread::Current());
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VariableSizedHandleScope hs(soa.Self());
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ClassLinker* const class_linker = Runtime::Current()->GetClassLinker();
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Handle<mirror::Class> c =
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hs.NewHandle(class_linker->FindSystemClass(soa.Self(), "Ljava/lang/Object;"));
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// Test nested scopes.
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StackHandleScope<1> inner(soa.Self());
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inner.NewHandle(c->AllocObject(soa.Self()));
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// Add a bunch of handles and make sure callbacks work.
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static const size_t kNumHandles = 100;
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std::vector<Handle<mirror::Object>> handles;
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for (size_t i = 0; i < kNumHandles; ++i) {
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BaseHandleScope* base = &hs;
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ObjPtr<mirror::Object> o = c->AllocObject(soa.Self());
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handles.push_back(hs.NewHandle(o));
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EXPECT_OBJ_PTR_EQ(o, handles.back().Get());
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EXPECT_TRUE(hs.Contains(handles.back().GetReference()));
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EXPECT_TRUE(base->Contains(handles.back().GetReference()));
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EXPECT_EQ(hs.NumberOfReferences(), base->NumberOfReferences());
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}
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CollectVisitor visitor;
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BaseHandleScope* base = &hs;
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base->VisitRoots(visitor);
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EXPECT_LE(visitor.visited.size(), base->NumberOfReferences());
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EXPECT_EQ(visitor.total_visited, base->NumberOfReferences());
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for (StackReference<mirror::Object>* ref : visitor.visited) {
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EXPECT_TRUE(base->Contains(ref));
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}
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}
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} // namespace art
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