aos/realtime_test.cc

#include "aos/realtime.h"

#include "aos/init.h"
#include "glog/logging.h"
#include "gtest/gtest.h"

DECLARE_bool(die_on_malloc);

namespace aos {
namespace testing {

// Tests that ScopedRealtime handles the simple case.
TEST(RealtimeTest, ScopedRealtime) {
  CheckNotRealtime();
  {
    ScopedRealtime rt;
    CheckRealtime();
  }
  CheckNotRealtime();
}

// Tests that ScopedRealtime handles nesting.
TEST(RealtimeTest, DoubleScopedRealtime) {
  CheckNotRealtime();
  {
    ScopedRealtime rt;
    CheckRealtime();
    {
      ScopedRealtime rt2;
      CheckRealtime();
    }
    CheckRealtime();
  }
  CheckNotRealtime();
}

// Tests that ScopedRealtime handles nesting with ScopedNotRealtime.
TEST(RealtimeTest, ScopedNotRealtime) {
  CheckNotRealtime();
  {
    ScopedRealtime rt;
    CheckRealtime();
    {
      ScopedNotRealtime nrt;
      CheckNotRealtime();
    }
    CheckRealtime();
  }
  CheckNotRealtime();
}

// Tests that ScopedRealtimeRestorer works both when starting RT and nonrt.
TEST(RealtimeTest, ScopedRealtimeRestorer) {
  CheckNotRealtime();
  {
    ScopedRealtime rt;
    CheckRealtime();
    {
      ScopedRealtimeRestorer restore;
      CheckRealtime();

      MarkRealtime(false);
      CheckNotRealtime();
    }
    CheckRealtime();
  }
  CheckNotRealtime();

  {
    ScopedRealtimeRestorer restore;
    CheckNotRealtime();

    MarkRealtime(true);
    CheckRealtime();
  }
  CheckNotRealtime();
}

// Tests that CHECK statements give real error messages rather than die on
// malloc.
TEST(RealtimeDeathTest, Check) {
  EXPECT_DEATH(
      {
        ScopedRealtime rt;
        CHECK_EQ(1, 2) << ": Numbers aren't equal.";
      },
      "Numbers aren't equal");
  EXPECT_DEATH(
      {
        ScopedRealtime rt;
        CHECK_GT(1, 2) << ": Cute error message";
      },
      "Cute error message");
}

// Tests that CHECK statements give real error messages rather than die on
// malloc.
TEST(RealtimeDeathTest, Fatal) {
  EXPECT_DEATH(
      {
        ScopedRealtime rt;
        LOG(FATAL) << "Cute message here";
      },
      "Cute message here");
}

// Tests that the signal handler drops RT permission and prints out a real
// backtrace instead of crashing on the resulting mallocs.
TEST(RealtimeDeathTest, SignalHandler) {
  EXPECT_DEATH(
      {
        ScopedRealtime rt;
        int x = reinterpret_cast<const volatile int *>(0)[0];
        LOG(INFO) << x;
      },
      "SIGSEGV \\(@0x0\\) received by PID.*stack trace:");
}

}  // namespace testing
}  // namespace aos

// We need a special gtest main to force die_on_malloc support on.  Otherwise
// we can't test CHECK statements before turning die_on_malloc on globally.
GTEST_API_ int main(int argc, char **argv) {
  ::testing::InitGoogleTest(&argc, argv);
  FLAGS_logtostderr = true;
  FLAGS_die_on_malloc = true;

  aos::InitGoogle(&argc, &argv);

  return RUN_ALL_TESTS();
}