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Diffstat (limited to 'test/syscalls/linux/alarm.cc')
-rw-r--r-- | test/syscalls/linux/alarm.cc | 192 |
1 files changed, 0 insertions, 192 deletions
diff --git a/test/syscalls/linux/alarm.cc b/test/syscalls/linux/alarm.cc deleted file mode 100644 index cd0704334..000000000 --- a/test/syscalls/linux/alarm.cc +++ /dev/null @@ -1,192 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// 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 <signal.h> -#include <unistd.h> - -#include "gtest/gtest.h" -#include "absl/time/clock.h" -#include "absl/time/time.h" -#include "test/util/file_descriptor.h" -#include "test/util/logging.h" -#include "test/util/signal_util.h" -#include "test/util/test_util.h" -#include "test/util/thread_util.h" - -namespace gvisor { -namespace testing { - -namespace { - -// N.B. Below, main blocks SIGALRM. Test cases must unblock it if they want -// delivery. - -void do_nothing_handler(int sig, siginfo_t* siginfo, void* arg) {} - -// No random save as the test relies on alarm timing. Cooperative save tests -// already cover the save between alarm and read. -TEST(AlarmTest, Interrupt) { - int pipe_fds[2]; - ASSERT_THAT(pipe(pipe_fds), SyscallSucceeds()); - - FileDescriptor read_fd(pipe_fds[0]); - FileDescriptor write_fd(pipe_fds[1]); - - // Use a signal handler that interrupts but does nothing rather than using the - // default terminate action. - struct sigaction sa; - sa.sa_sigaction = do_nothing_handler; - sigfillset(&sa.sa_mask); - sa.sa_flags = 0; - auto sa_cleanup = ASSERT_NO_ERRNO_AND_VALUE(ScopedSigaction(SIGALRM, sa)); - - // Actually allow SIGALRM delivery. - auto mask_cleanup = - ASSERT_NO_ERRNO_AND_VALUE(ScopedSignalMask(SIG_UNBLOCK, SIGALRM)); - - // Alarm in 20 second, which should be well after read blocks below. - ASSERT_THAT(alarm(20), SyscallSucceeds()); - - char buf; - ASSERT_THAT(read(read_fd.get(), &buf, 1), SyscallFailsWithErrno(EINTR)); -} - -/* Count of the number of SIGALARMS handled. */ -static volatile int alarms_received = 0; - -void inc_alarms_handler(int sig, siginfo_t* siginfo, void* arg) { - alarms_received++; -} - -// No random save as the test relies on alarm timing. Cooperative save tests -// already cover the save between alarm and read. -TEST(AlarmTest, Restart) { - alarms_received = 0; - - int pipe_fds[2]; - ASSERT_THAT(pipe(pipe_fds), SyscallSucceeds()); - - FileDescriptor read_fd(pipe_fds[0]); - // Write end closed by thread below. - - struct sigaction sa; - sa.sa_sigaction = inc_alarms_handler; - sigfillset(&sa.sa_mask); - sa.sa_flags = SA_RESTART; - auto sa_cleanup = ASSERT_NO_ERRNO_AND_VALUE(ScopedSigaction(SIGALRM, sa)); - - // Spawn a thread to eventually unblock the read below. - ScopedThread t([pipe_fds] { - absl::SleepFor(absl::Seconds(30)); - EXPECT_THAT(close(pipe_fds[1]), SyscallSucceeds()); - }); - - // Actually allow SIGALRM delivery. - auto mask_cleanup = - ASSERT_NO_ERRNO_AND_VALUE(ScopedSignalMask(SIG_UNBLOCK, SIGALRM)); - - // Alarm in 20 second, which should be well after read blocks below, but - // before it returns. - ASSERT_THAT(alarm(20), SyscallSucceeds()); - - // Read and eventually get an EOF from the writer closing. If SA_RESTART - // didn't work, then the alarm would not have fired and we wouldn't increment - // our alarms_received count in our signal handler, or we would have not - // restarted the syscall gracefully, which we expect below in order to be - // able to get the final EOF on the pipe. - char buf; - ASSERT_THAT(read(read_fd.get(), &buf, 1), SyscallSucceeds()); - EXPECT_EQ(alarms_received, 1); - - t.Join(); -} - -// No random save as the test relies on alarm timing. Cooperative save tests -// already cover the save between alarm and pause. -TEST(AlarmTest, SaSiginfo) { - // Use a signal handler that interrupts but does nothing rather than using the - // default terminate action. - struct sigaction sa; - sa.sa_sigaction = do_nothing_handler; - sigfillset(&sa.sa_mask); - sa.sa_flags = SA_SIGINFO; - auto sa_cleanup = ASSERT_NO_ERRNO_AND_VALUE(ScopedSigaction(SIGALRM, sa)); - - // Actually allow SIGALRM delivery. - auto mask_cleanup = - ASSERT_NO_ERRNO_AND_VALUE(ScopedSignalMask(SIG_UNBLOCK, SIGALRM)); - - // Alarm in 20 second, which should be well after pause blocks below. - ASSERT_THAT(alarm(20), SyscallSucceeds()); - ASSERT_THAT(pause(), SyscallFailsWithErrno(EINTR)); -} - -// No random save as the test relies on alarm timing. Cooperative save tests -// already cover the save between alarm and pause. -TEST(AlarmTest, SaInterrupt) { - // Use a signal handler that interrupts but does nothing rather than using the - // default terminate action. - struct sigaction sa; - sa.sa_sigaction = do_nothing_handler; - sigfillset(&sa.sa_mask); - sa.sa_flags = SA_INTERRUPT; - auto sa_cleanup = ASSERT_NO_ERRNO_AND_VALUE(ScopedSigaction(SIGALRM, sa)); - - // Actually allow SIGALRM delivery. - auto mask_cleanup = - ASSERT_NO_ERRNO_AND_VALUE(ScopedSignalMask(SIG_UNBLOCK, SIGALRM)); - - // Alarm in 20 second, which should be well after pause blocks below. - ASSERT_THAT(alarm(20), SyscallSucceeds()); - ASSERT_THAT(pause(), SyscallFailsWithErrno(EINTR)); -} - -TEST(AlarmTest, UserModeSpinning) { - alarms_received = 0; - - struct sigaction sa = {}; - sa.sa_sigaction = inc_alarms_handler; - sigfillset(&sa.sa_mask); - sa.sa_flags = SA_SIGINFO; - auto sa_cleanup = ASSERT_NO_ERRNO_AND_VALUE(ScopedSigaction(SIGALRM, sa)); - - // Actually allow SIGALRM delivery. - auto mask_cleanup = - ASSERT_NO_ERRNO_AND_VALUE(ScopedSignalMask(SIG_UNBLOCK, SIGALRM)); - - // Alarm in 20 second, which should be well into the loop below. - ASSERT_THAT(alarm(20), SyscallSucceeds()); - // Make sure that the signal gets delivered even if we are spinning in user - // mode when it arrives. - while (!alarms_received) { - } -} - -} // namespace - -} // namespace testing -} // namespace gvisor - -int main(int argc, char** argv) { - // These tests depend on delivering SIGALRM to the main thread. Block SIGALRM - // so that any other threads created by TestInit will also have SIGALRM - // blocked. - sigset_t set; - sigemptyset(&set); - sigaddset(&set, SIGALRM); - TEST_PCHECK(sigprocmask(SIG_BLOCK, &set, nullptr) == 0); - - gvisor::testing::TestInit(&argc, &argv); - return gvisor::testing::RunAllTests(); -} |