blob: 71da3655ae11ae6031076fff6843f87e445b0da5 [file] [log] [blame]
/*
* 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));
}