| /* |
| * 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 <fcntl.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <sys/prctl.h> |
| |
| #include <gtest/gtest.h> |
| |
| #include <memunreachable/memunreachable.h> |
| |
| class HiddenPointer { |
| public: |
| explicit HiddenPointer(size_t size = 256) { |
| Set(malloc(size)); |
| } |
| ~HiddenPointer() { |
| Free(); |
| } |
| void* Get() { |
| return reinterpret_cast<void*>(~ptr_); |
| } |
| void Free() { |
| free(Get()); |
| Set(nullptr); |
| } |
| private: |
| void Set(void* ptr) { |
| ptr_ = ~reinterpret_cast<uintptr_t>(ptr); |
| } |
| volatile uintptr_t ptr_; |
| }; |
| |
| static void Ref(void* ptr) { |
| write(0, ptr, 0); |
| } |
| |
| TEST(MemunreachableTest, clean) { |
| UnreachableMemoryInfo info; |
| |
| ASSERT_TRUE(LogUnreachableMemory(true, 100)); |
| |
| ASSERT_TRUE(GetUnreachableMemory(info)); |
| ASSERT_EQ(0U, info.leaks.size()); |
| } |
| |
| TEST(MemunreachableTest, stack) { |
| HiddenPointer hidden_ptr; |
| |
| { |
| void* ptr = hidden_ptr.Get(); |
| Ref(ptr); |
| |
| UnreachableMemoryInfo info; |
| |
| ASSERT_TRUE(GetUnreachableMemory(info)); |
| ASSERT_EQ(0U, info.leaks.size()); |
| |
| Ref(ptr); |
| } |
| |
| { |
| UnreachableMemoryInfo info; |
| |
| ASSERT_TRUE(GetUnreachableMemory(info)); |
| ASSERT_EQ(1U, info.leaks.size()); |
| } |
| |
| hidden_ptr.Free(); |
| |
| { |
| UnreachableMemoryInfo info; |
| |
| ASSERT_TRUE(GetUnreachableMemory(info)); |
| ASSERT_EQ(0U, info.leaks.size()); |
| } |
| } |
| |
| void* g_ptr; |
| |
| TEST(MemunreachableTest, global) { |
| HiddenPointer hidden_ptr; |
| |
| g_ptr = hidden_ptr.Get(); |
| |
| { |
| UnreachableMemoryInfo info; |
| |
| ASSERT_TRUE(GetUnreachableMemory(info)); |
| ASSERT_EQ(0U, info.leaks.size()); |
| } |
| |
| g_ptr = nullptr; |
| |
| { |
| UnreachableMemoryInfo info; |
| |
| ASSERT_TRUE(GetUnreachableMemory(info)); |
| ASSERT_EQ(1U, info.leaks.size()); |
| } |
| |
| hidden_ptr.Free(); |
| |
| { |
| UnreachableMemoryInfo info; |
| |
| ASSERT_TRUE(GetUnreachableMemory(info)); |
| ASSERT_EQ(0U, info.leaks.size()); |
| } |
| } |
| |
| TEST(MemunreachableTest, tls) { |
| HiddenPointer hidden_ptr; |
| pthread_key_t key; |
| pthread_key_create(&key, nullptr); |
| |
| pthread_setspecific(key, hidden_ptr.Get()); |
| |
| { |
| UnreachableMemoryInfo info; |
| |
| ASSERT_TRUE(GetUnreachableMemory(info)); |
| ASSERT_EQ(0U, info.leaks.size()); |
| } |
| |
| pthread_setspecific(key, nullptr); |
| |
| { |
| UnreachableMemoryInfo info; |
| |
| ASSERT_TRUE(GetUnreachableMemory(info)); |
| ASSERT_EQ(1U, info.leaks.size()); |
| } |
| |
| hidden_ptr.Free(); |
| |
| { |
| UnreachableMemoryInfo info; |
| |
| ASSERT_TRUE(GetUnreachableMemory(info)); |
| ASSERT_EQ(0U, info.leaks.size()); |
| } |
| |
| pthread_key_delete(key); |
| } |
| |
| TEST(MemunreachableTest, twice) { |
| HiddenPointer hidden_ptr; |
| |
| { |
| UnreachableMemoryInfo info; |
| |
| ASSERT_TRUE(GetUnreachableMemory(info)); |
| ASSERT_EQ(1U, info.leaks.size()); |
| } |
| |
| { |
| UnreachableMemoryInfo info; |
| |
| ASSERT_TRUE(GetUnreachableMemory(info)); |
| ASSERT_EQ(1U, info.leaks.size()); |
| } |
| |
| hidden_ptr.Free(); |
| |
| { |
| UnreachableMemoryInfo info; |
| |
| ASSERT_TRUE(GetUnreachableMemory(info)); |
| ASSERT_EQ(0U, info.leaks.size()); |
| } |
| } |
| |
| TEST(MemunreachableTest, log) { |
| HiddenPointer hidden_ptr; |
| |
| ASSERT_TRUE(LogUnreachableMemory(true, 100)); |
| |
| hidden_ptr.Free(); |
| |
| { |
| UnreachableMemoryInfo info; |
| |
| ASSERT_TRUE(GetUnreachableMemory(info)); |
| ASSERT_EQ(0U, info.leaks.size()); |
| } |
| } |
| |
| TEST(MemunreachableTest, notdumpable) { |
| ASSERT_EQ(0, prctl(PR_SET_DUMPABLE, 0)); |
| |
| HiddenPointer hidden_ptr; |
| |
| ASSERT_TRUE(LogUnreachableMemory(true, 100)); |
| |
| ASSERT_EQ(0, prctl(PR_SET_DUMPABLE, 1)); |
| } |
| |
| TEST(MemunreachableTest, leak_lots) { |
| std::vector<HiddenPointer> hidden_ptrs; |
| hidden_ptrs.resize(1024); |
| |
| ASSERT_TRUE(LogUnreachableMemory(true, 100)); |
| } |