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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "sandbox/linux/services/thread_helpers.h"
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include "base/basictypes.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "base/posix/eintr_wrapper.h"
#include "base/process/process_metrics.h"
#include "base/threading/platform_thread.h"
#include "base/threading/thread.h"
#include "sandbox/linux/tests/unit_tests.h"
#include "testing/gtest/include/gtest/gtest.h"
using base::PlatformThread;
namespace sandbox {
namespace {
int GetRaceTestIterations() {
if (IsRunningOnValgrind()) {
return 2;
} else {
return 1000;
}
}
class ScopedProcSelfTask {
public:
ScopedProcSelfTask() : fd_(-1) {
fd_ = open("/proc/self/task/", O_RDONLY | O_DIRECTORY);
CHECK_LE(0, fd_);
}
~ScopedProcSelfTask() { PCHECK(0 == IGNORE_EINTR(close(fd_))); }
int fd() { return fd_; }
private:
int fd_;
DISALLOW_COPY_AND_ASSIGN(ScopedProcSelfTask);
};
#if defined(THREAD_SANITIZER)
// These tests fail under ThreadSanitizer, see http://crbug.com/342305
#define MAYBE_IsSingleThreadedBasic DISABLED_IsSingleThreadedBasic
#define MAYBE_IsSingleThreadedIterated DISABLED_IsSingleThreadedIterated
#define MAYBE_IsSingleThreadedStartAndStop DISABLED_IsSingleThreadedStartAndStop
#else
#define MAYBE_IsSingleThreadedBasic IsSingleThreadedBasic
#define MAYBE_IsSingleThreadedIterated IsSingleThreadedIterated
#define MAYBE_IsSingleThreadedStartAndStop IsSingleThreadedStartAndStop
#endif
TEST(ThreadHelpers, MAYBE_IsSingleThreadedBasic) {
ScopedProcSelfTask task;
ASSERT_TRUE(ThreadHelpers::IsSingleThreaded(task.fd()));
base::Thread thread("sandbox_tests");
ASSERT_TRUE(thread.Start());
ASSERT_FALSE(ThreadHelpers::IsSingleThreaded(task.fd()));
// Explicitly stop the thread here to not pollute the next test.
ASSERT_TRUE(ThreadHelpers::StopThreadAndWatchProcFS(task.fd(), &thread));
}
TEST(ThreadHelpers, MAYBE_IsSingleThreadedIterated) {
ScopedProcSelfTask task;
ASSERT_TRUE(ThreadHelpers::IsSingleThreaded(task.fd()));
// Iterate to check for race conditions.
for (int i = 0; i < GetRaceTestIterations(); ++i) {
base::Thread thread("sandbox_tests");
ASSERT_TRUE(thread.Start());
ASSERT_FALSE(ThreadHelpers::IsSingleThreaded(task.fd()));
// Explicitly stop the thread here to not pollute the next test.
ASSERT_TRUE(ThreadHelpers::StopThreadAndWatchProcFS(task.fd(), &thread));
}
}
TEST(ThreadHelpers, MAYBE_IsSingleThreadedStartAndStop) {
ScopedProcSelfTask task;
ASSERT_TRUE(ThreadHelpers::IsSingleThreaded(task.fd()));
base::Thread thread("sandbox_tests");
// This is testing for a race condition, so iterate.
// Manually, this has been tested with more that 1M iterations.
for (int i = 0; i < GetRaceTestIterations(); ++i) {
ASSERT_TRUE(thread.Start());
ASSERT_FALSE(ThreadHelpers::IsSingleThreaded(task.fd()));
ASSERT_TRUE(ThreadHelpers::StopThreadAndWatchProcFS(task.fd(), &thread));
ASSERT_TRUE(ThreadHelpers::IsSingleThreaded(task.fd()));
ASSERT_EQ(1, base::GetNumberOfThreads(base::GetCurrentProcessHandle()));
}
}
} // namespace
} // namespace sandbox
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