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//===-- sanitizer_linux_test.cc -------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// Tests for sanitizer_linux.h
//
//===----------------------------------------------------------------------===//
#ifdef __linux__
#include "sanitizer_common/sanitizer_linux.h"
#include "gtest/gtest.h"
#include "sanitizer_common/sanitizer_common.h"
#include <pthread.h>
#include <sched.h>
#include <stdlib.h>
#include <algorithm>
#include <vector>
namespace __sanitizer {
struct TidReporterArgument {
TidReporterArgument() {
pthread_mutex_init(&terminate_thread_mutex, NULL);
pthread_mutex_init(&tid_reported_mutex, NULL);
pthread_cond_init(&terminate_thread_cond, NULL);
pthread_cond_init(&tid_reported_cond, NULL);
terminate_thread = false;
}
~TidReporterArgument() {
pthread_mutex_destroy(&terminate_thread_mutex);
pthread_mutex_destroy(&tid_reported_mutex);
pthread_cond_destroy(&terminate_thread_cond);
pthread_cond_destroy(&tid_reported_cond);
}
pid_t reported_tid;
// For signaling to spawned threads that they should terminate.
pthread_cond_t terminate_thread_cond;
pthread_mutex_t terminate_thread_mutex;
bool terminate_thread;
// For signaling to main thread that a child thread has reported its tid.
pthread_cond_t tid_reported_cond;
pthread_mutex_t tid_reported_mutex;
private:
// Disallow evil constructors
TidReporterArgument(const TidReporterArgument &);
void operator=(const TidReporterArgument &);
};
class ThreadListerTest : public ::testing::Test {
protected:
virtual void SetUp() {
pthread_t pthread_id;
pid_t tid;
for (uptr i = 0; i < kThreadCount; i++) {
SpawnTidReporter(&pthread_id, &tid);
pthread_ids_.push_back(pthread_id);
tids_.push_back(tid);
}
}
virtual void TearDown() {
pthread_mutex_lock(&thread_arg.terminate_thread_mutex);
thread_arg.terminate_thread = true;
pthread_cond_broadcast(&thread_arg.terminate_thread_cond);
pthread_mutex_unlock(&thread_arg.terminate_thread_mutex);
for (uptr i = 0; i < pthread_ids_.size(); i++)
pthread_join(pthread_ids_[i], NULL);
}
void SpawnTidReporter(pthread_t *pthread_id, pid_t *tid);
static const uptr kThreadCount = 20;
std::vector<pthread_t> pthread_ids_;
std::vector<pid_t> tids_;
TidReporterArgument thread_arg;
};
// Writes its TID once to reported_tid and waits until signaled to terminate.
void *TidReporterThread(void *argument) {
TidReporterArgument *arg = reinterpret_cast<TidReporterArgument *>(argument);
pthread_mutex_lock(&arg->tid_reported_mutex);
arg->reported_tid = GetTid();
pthread_cond_broadcast(&arg->tid_reported_cond);
pthread_mutex_unlock(&arg->tid_reported_mutex);
pthread_mutex_lock(&arg->terminate_thread_mutex);
while (!arg->terminate_thread)
pthread_cond_wait(&arg->terminate_thread_cond,
&arg->terminate_thread_mutex);
pthread_mutex_unlock(&arg->terminate_thread_mutex);
return NULL;
}
void ThreadListerTest::SpawnTidReporter(pthread_t *pthread_id,
pid_t *tid) {
pthread_mutex_lock(&thread_arg.tid_reported_mutex);
thread_arg.reported_tid = -1;
ASSERT_EQ(0, pthread_create(pthread_id, NULL,
TidReporterThread,
&thread_arg));
while (thread_arg.reported_tid == -1)
pthread_cond_wait(&thread_arg.tid_reported_cond,
&thread_arg.tid_reported_mutex);
pthread_mutex_unlock(&thread_arg.tid_reported_mutex);
*tid = thread_arg.reported_tid;
}
static std::vector<pid_t> ReadTidsToVector(ThreadLister *thread_lister) {
std::vector<pid_t> listed_tids;
pid_t tid;
while ((tid = thread_lister->GetNextTID()) >= 0)
listed_tids.push_back(tid);
EXPECT_FALSE(thread_lister->error());
return listed_tids;
}
static bool Includes(std::vector<pid_t> first, std::vector<pid_t> second) {
std::sort(first.begin(), first.end());
std::sort(second.begin(), second.end());
return std::includes(first.begin(), first.end(),
second.begin(), second.end());
}
static bool HasElement(std::vector<pid_t> vector, pid_t element) {
return std::find(vector.begin(), vector.end(), element) != vector.end();
}
// ThreadLister's output should include the current thread's TID and the TID of
// every thread we spawned.
TEST_F(ThreadListerTest, ThreadListerSeesAllSpawnedThreads) {
pid_t self_tid = GetTid();
ThreadLister thread_lister(getpid());
std::vector<pid_t> listed_tids = ReadTidsToVector(&thread_lister);
ASSERT_TRUE(HasElement(listed_tids, self_tid));
ASSERT_TRUE(Includes(listed_tids, tids_));
}
// Calling Reset() should not cause ThreadLister to forget any threads it's
// supposed to know about.
TEST_F(ThreadListerTest, ResetDoesNotForgetThreads) {
ThreadLister thread_lister(getpid());
// Run the loop body twice, because Reset() might behave differently if called
// on a freshly created object.
for (uptr i = 0; i < 2; i++) {
thread_lister.Reset();
std::vector<pid_t> listed_tids = ReadTidsToVector(&thread_lister);
ASSERT_TRUE(Includes(listed_tids, tids_));
}
}
// If new threads have spawned during ThreadLister object's lifetime, calling
// Reset() should cause ThreadLister to recognize their existence.
TEST_F(ThreadListerTest, ResetMakesNewThreadsKnown) {
ThreadLister thread_lister(getpid());
std::vector<pid_t> threads_before_extra = ReadTidsToVector(&thread_lister);
pthread_t extra_pthread_id;
pid_t extra_tid;
SpawnTidReporter(&extra_pthread_id, &extra_tid);
// Register the new thread so it gets terminated in TearDown().
pthread_ids_.push_back(extra_pthread_id);
// It would be very bizarre if the new TID had been listed before we even
// spawned that thread, but it would also cause a false success in this test,
// so better check for that.
ASSERT_FALSE(HasElement(threads_before_extra, extra_tid));
thread_lister.Reset();
std::vector<pid_t> threads_after_extra = ReadTidsToVector(&thread_lister);
ASSERT_TRUE(HasElement(threads_after_extra, extra_tid));
}
TEST(SanitizerCommon, SetEnvTest) {
const char kEnvName[] = "ENV_FOO";
SetEnv(kEnvName, "value");
EXPECT_STREQ("value", getenv(kEnvName));
unsetenv(kEnvName);
EXPECT_EQ(0, getenv(kEnvName));
}
} // namespace __sanitizer
#endif // __linux__
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