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/*
* Copyright (C) 2012 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 "mutex-inl.h"
#include "common_runtime_test.h"
#include "thread-current-inl.h"
namespace art {
class MutexTest : public CommonRuntimeTest {};
struct MutexTester {
static void AssertDepth(Mutex& mu, uint32_t expected_depth) {
ASSERT_EQ(expected_depth, mu.GetDepth());
// This test is single-threaded, so we also know _who_ should hold the lock.
if (expected_depth == 0) {
mu.AssertNotHeld(Thread::Current());
} else {
mu.AssertHeld(Thread::Current());
}
}
};
TEST_F(MutexTest, LockUnlock) {
Mutex mu("test mutex");
MutexTester::AssertDepth(mu, 0U);
mu.Lock(Thread::Current());
MutexTester::AssertDepth(mu, 1U);
mu.Unlock(Thread::Current());
MutexTester::AssertDepth(mu, 0U);
}
// GCC has trouble with our mutex tests, so we have to turn off thread safety analysis.
static void TryLockUnlockTest() NO_THREAD_SAFETY_ANALYSIS {
Mutex mu("test mutex");
MutexTester::AssertDepth(mu, 0U);
ASSERT_TRUE(mu.TryLock(Thread::Current()));
MutexTester::AssertDepth(mu, 1U);
mu.Unlock(Thread::Current());
MutexTester::AssertDepth(mu, 0U);
}
TEST_F(MutexTest, TryLockUnlock) {
TryLockUnlockTest();
}
// GCC has trouble with our mutex tests, so we have to turn off thread safety analysis.
static void RecursiveLockUnlockTest() NO_THREAD_SAFETY_ANALYSIS {
Mutex mu("test mutex", kDefaultMutexLevel, true);
MutexTester::AssertDepth(mu, 0U);
mu.Lock(Thread::Current());
MutexTester::AssertDepth(mu, 1U);
mu.Lock(Thread::Current());
MutexTester::AssertDepth(mu, 2U);
mu.Unlock(Thread::Current());
MutexTester::AssertDepth(mu, 1U);
mu.Unlock(Thread::Current());
MutexTester::AssertDepth(mu, 0U);
}
TEST_F(MutexTest, RecursiveLockUnlock) {
RecursiveLockUnlockTest();
}
// GCC has trouble with our mutex tests, so we have to turn off thread safety analysis.
static void RecursiveTryLockUnlockTest() NO_THREAD_SAFETY_ANALYSIS {
Mutex mu("test mutex", kDefaultMutexLevel, true);
MutexTester::AssertDepth(mu, 0U);
ASSERT_TRUE(mu.TryLock(Thread::Current()));
MutexTester::AssertDepth(mu, 1U);
ASSERT_TRUE(mu.TryLock(Thread::Current()));
MutexTester::AssertDepth(mu, 2U);
mu.Unlock(Thread::Current());
MutexTester::AssertDepth(mu, 1U);
mu.Unlock(Thread::Current());
MutexTester::AssertDepth(mu, 0U);
}
TEST_F(MutexTest, RecursiveTryLockUnlock) {
RecursiveTryLockUnlockTest();
}
struct RecursiveLockWait {
RecursiveLockWait()
: mu("test mutex", kDefaultMutexLevel, true), cv("test condition variable", mu) {
}
Mutex mu;
ConditionVariable cv;
};
static void* RecursiveLockWaitCallback(void* arg) {
RecursiveLockWait* state = reinterpret_cast<RecursiveLockWait*>(arg);
state->mu.Lock(Thread::Current());
state->cv.Signal(Thread::Current());
state->mu.Unlock(Thread::Current());
return nullptr;
}
// GCC has trouble with our mutex tests, so we have to turn off thread safety analysis.
static void RecursiveLockWaitTest() NO_THREAD_SAFETY_ANALYSIS {
RecursiveLockWait state;
state.mu.Lock(Thread::Current());
state.mu.Lock(Thread::Current());
pthread_t pthread;
int pthread_create_result = pthread_create(&pthread, nullptr, RecursiveLockWaitCallback, &state);
ASSERT_EQ(0, pthread_create_result);
state.cv.Wait(Thread::Current());
state.mu.Unlock(Thread::Current());
state.mu.Unlock(Thread::Current());
EXPECT_EQ(pthread_join(pthread, nullptr), 0);
}
// This ensures we don't hang when waiting on a recursively locked mutex,
// which is not supported with bare pthread_mutex_t.
TEST_F(MutexTest, RecursiveLockWait) {
RecursiveLockWaitTest();
}
TEST_F(MutexTest, SharedLockUnlock) {
ReaderWriterMutex mu("test rwmutex");
mu.AssertNotHeld(Thread::Current());
mu.AssertNotExclusiveHeld(Thread::Current());
mu.SharedLock(Thread::Current());
mu.AssertSharedHeld(Thread::Current());
mu.AssertNotExclusiveHeld(Thread::Current());
mu.SharedUnlock(Thread::Current());
mu.AssertNotHeld(Thread::Current());
}
TEST_F(MutexTest, ExclusiveLockUnlock) {
ReaderWriterMutex mu("test rwmutex");
mu.AssertNotHeld(Thread::Current());
mu.ExclusiveLock(Thread::Current());
mu.AssertSharedHeld(Thread::Current());
mu.AssertExclusiveHeld(Thread::Current());
mu.ExclusiveUnlock(Thread::Current());
mu.AssertNotHeld(Thread::Current());
}
// GCC has trouble with our mutex tests, so we have to turn off thread safety analysis.
static void SharedTryLockUnlockTest() NO_THREAD_SAFETY_ANALYSIS {
ReaderWriterMutex mu("test rwmutex");
mu.AssertNotHeld(Thread::Current());
ASSERT_TRUE(mu.SharedTryLock(Thread::Current()));
mu.AssertSharedHeld(Thread::Current());
mu.SharedUnlock(Thread::Current());
mu.AssertNotHeld(Thread::Current());
}
TEST_F(MutexTest, SharedTryLockUnlock) {
SharedTryLockUnlockTest();
}
} // namespace art
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