1 files changed, 0 insertions, 323 deletions
diff --git a/test/syscalls/linux/sigtimedwait.cc b/test/syscalls/linux/sigtimedwait.cc
deleted file mode 100644
index 4f8afff15..000000000
--- a/test/syscalls/linux/sigtimedwait.cc
+++ /dev/null
@@ -1,323 +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 <sys/wait.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"
-#include "test/util/timer_util.h"
-
-namespace gvisor {
-namespace testing {
-
-namespace {
-
-// N.B. main() blocks SIGALRM and SIGCHLD on all threads.
-
-constexpr int kAlarmSecs = 12;
-
-void NoopHandler(int sig, siginfo_t* info, void* context) {}
-
-TEST(SigtimedwaitTest, InvalidTimeout) {
-  sigset_t mask;
-  sigemptyset(&mask);
-  struct timespec timeout = {0, 1000000001};
-  EXPECT_THAT(sigtimedwait(&mask, nullptr, &timeout),
-              SyscallFailsWithErrno(EINVAL));
-  timeout = {-1, 0};
-  EXPECT_THAT(sigtimedwait(&mask, nullptr, &timeout),
-              SyscallFailsWithErrno(EINVAL));
-  timeout = {0, -1};
-  EXPECT_THAT(sigtimedwait(&mask, nullptr, &timeout),
-              SyscallFailsWithErrno(EINVAL));
-}
-
-// No random save as the test relies on alarm timing. Cooperative save tests
-// already cover the save between alarm and wait.
-TEST(SigtimedwaitTest, AlarmReturnsAlarm_NoRandomSave) {
-  struct itimerval itv = {};
-  itv.it_value.tv_sec = kAlarmSecs;
-  const auto itimer_cleanup =
-      ASSERT_NO_ERRNO_AND_VALUE(ScopedItimer(ITIMER_REAL, itv));
-
-  sigset_t mask;
-  sigemptyset(&mask);
-  sigaddset(&mask, SIGALRM);
-  siginfo_t info = {};
-  EXPECT_THAT(RetryEINTR(sigtimedwait)(&mask, &info, nullptr),
-              SyscallSucceedsWithValue(SIGALRM));
-  EXPECT_EQ(SIGALRM, info.si_signo);
-}
-
-// No random save as the test relies on alarm timing. Cooperative save tests
-// already cover the save between alarm and wait.
-TEST(SigtimedwaitTest, NullTimeoutReturnsEINTR_NoRandomSave) {
-  struct sigaction sa;
-  sa.sa_sigaction = NoopHandler;
-  sigfillset(&sa.sa_mask);
-  sa.sa_flags = SA_SIGINFO;
-  const auto action_cleanup =
-      ASSERT_NO_ERRNO_AND_VALUE(ScopedSigaction(SIGALRM, sa));
-
-  const auto mask_cleanup =
-      ASSERT_NO_ERRNO_AND_VALUE(ScopedSignalMask(SIG_UNBLOCK, SIGALRM));
-
-  struct itimerval itv = {};
-  itv.it_value.tv_sec = kAlarmSecs;
-  const auto itimer_cleanup =
-      ASSERT_NO_ERRNO_AND_VALUE(ScopedItimer(ITIMER_REAL, itv));
-
-  sigset_t mask;
-  sigemptyset(&mask);
-  EXPECT_THAT(sigtimedwait(&mask, nullptr, nullptr),
-              SyscallFailsWithErrno(EINTR));
-}
-
-TEST(SigtimedwaitTest, LegitTimeoutReturnsEAGAIN) {
-  sigset_t mask;
-  sigemptyset(&mask);
-  struct timespec timeout = {1, 0};  // 1 second
-  EXPECT_THAT(RetryEINTR(sigtimedwait)(&mask, nullptr, &timeout),
-              SyscallFailsWithErrno(EAGAIN));
-}
-
-TEST(SigtimedwaitTest, ZeroTimeoutReturnsEAGAIN) {
-  sigset_t mask;
-  sigemptyset(&mask);
-  struct timespec timeout = {0, 0};  // 0 second
-  EXPECT_THAT(sigtimedwait(&mask, nullptr, &timeout),
-              SyscallFailsWithErrno(EAGAIN));
-}
-
-TEST(SigtimedwaitTest, KillGeneratedSIGCHLD) {
-  EXPECT_THAT(kill(getpid(), SIGCHLD), SyscallSucceeds());
-
-  sigset_t mask;
-  sigemptyset(&mask);
-  sigaddset(&mask, SIGCHLD);
-  struct timespec ts = {5, 0};
-  EXPECT_THAT(RetryEINTR(sigtimedwait)(&mask, nullptr, &ts),
-              SyscallSucceedsWithValue(SIGCHLD));
-}
-
-TEST(SigtimedwaitTest, ChildExitGeneratedSIGCHLD) {
-  pid_t pid = fork();
-  if (pid == 0) {
-    _exit(0);
-  }
-  ASSERT_THAT(pid, SyscallSucceeds());
-
-  int status;
-  EXPECT_THAT(waitpid(pid, &status, 0), SyscallSucceedsWithValue(pid));
-  EXPECT_TRUE(WIFEXITED(status) && WEXITSTATUS(status) == 0) << status;
-
-  sigset_t mask;
-  sigemptyset(&mask);
-  sigaddset(&mask, SIGCHLD);
-  struct timespec ts = {5, 0};
-  EXPECT_THAT(RetryEINTR(sigtimedwait)(&mask, nullptr, &ts),
-              SyscallSucceedsWithValue(SIGCHLD));
-}
-
-TEST(SigtimedwaitTest, ChildExitGeneratedSIGCHLDWithHandler) {
-  // Setup handler for SIGCHLD, but don't unblock it.
-  struct sigaction sa;
-  sa.sa_sigaction = NoopHandler;
-  sigfillset(&sa.sa_mask);
-  sa.sa_flags = SA_SIGINFO;
-  const auto action_cleanup =
-      ASSERT_NO_ERRNO_AND_VALUE(ScopedSigaction(SIGCHLD, sa));
-
-  pid_t pid = fork();
-  if (pid == 0) {
-    _exit(0);
-  }
-  ASSERT_THAT(pid, SyscallSucceeds());
-
-  sigset_t mask;
-  sigemptyset(&mask);
-  sigaddset(&mask, SIGCHLD);
-  struct timespec ts = {5, 0};
-  EXPECT_THAT(RetryEINTR(sigtimedwait)(&mask, nullptr, &ts),
-              SyscallSucceedsWithValue(SIGCHLD));
-
-  int status;
-  EXPECT_THAT(waitpid(pid, &status, 0), SyscallSucceedsWithValue(pid));
-  EXPECT_TRUE(WIFEXITED(status) && WEXITSTATUS(status) == 0) << status;
-}
-
-// sigtimedwait cannot catch SIGKILL.
-TEST(SigtimedwaitTest, SIGKILLUncaught) {
-  // This is a regression test for sigtimedwait dequeuing SIGKILLs, thus
-  // preventing the task from exiting.
-  //
-  // The explanation below is specific to behavior in gVisor. The Linux behavior
-  // here is irrelevant because without a bug that prevents delivery of SIGKILL,
-  // none of this behavior is visible (in Linux or gVisor).
-  //
-  // SIGKILL is rather intrusive. Simply sending the SIGKILL marks
-  // ThreadGroup.exitStatus as exiting with SIGKILL, before the SIGKILL is even
-  // delivered.
-  //
-  // As a result, we cannot simply exit the child with a different exit code if
-  // it survives and expect to see that code in waitpid because:
-  //   1. PrepareGroupExit will override Task.exitStatus with
-  //      ThreadGroup.exitStatus.
-  //   2. waitpid(2) will always return ThreadGroup.exitStatus rather than
-  //      Task.exitStatus.
-  //
-  // We could use exit(2) to set Task.exitStatus without override, and a SIGCHLD
-  // handler to receive Task.exitStatus in the parent, but with that much
-  // test complexity, it is cleaner to simply use a pipe to notify the parent
-  // that we survived.
-  constexpr auto kSigtimedwaitSetupTime = absl::Seconds(2);
-
-  int pipe_fds[2];
-  ASSERT_THAT(pipe(pipe_fds), SyscallSucceeds());
-  FileDescriptor rfd(pipe_fds[0]);
-  FileDescriptor wfd(pipe_fds[1]);
-
-  pid_t pid = fork();
-  if (pid == 0) {
-    rfd.reset();
-
-    sigset_t mask;
-    sigemptyset(&mask);
-    sigaddset(&mask, SIGKILL);
-    RetryEINTR(sigtimedwait)(&mask, nullptr, nullptr);
-
-    // Survived.
-    char c = 'a';
-    TEST_PCHECK(WriteFd(wfd.get(), &c, 1) == 1);
-    _exit(1);
-  }
-  ASSERT_THAT(pid, SyscallSucceeds());
-
-  wfd.reset();
-
-  // Wait for child to block in sigtimedwait, then kill it.
-  absl::SleepFor(kSigtimedwaitSetupTime);
-
-  // Sending SIGKILL will attempt to enqueue the signal twice: once in the
-  // normal signal sending path, and once to all Tasks in the ThreadGroup when
-  // applying SIGKILL side-effects.
-  //
-  // If we use kill(2), the former will be on the ThreadGroup signal queue and
-  // the latter will be on the Task signal queue. sigtimedwait can only dequeue
-  // one signal, so the other would kill the Task, masking bugs.
-  //
-  // If we use tkill(2), the former will be on the Task signal queue and the
-  // latter will be dropped as a duplicate. Then sigtimedwait can theoretically
-  // dequeue the single SIGKILL.
-  EXPECT_THAT(syscall(SYS_tkill, pid, SIGKILL), SyscallSucceeds());
-
-  int status;
-  EXPECT_THAT(RetryEINTR(waitpid)(pid, &status, 0),
-              SyscallSucceedsWithValue(pid));
-  EXPECT_TRUE(WIFSIGNALED(status) && WTERMSIG(status) == SIGKILL) << status;
-
-  // Child shouldn't have survived.
-  char c;
-  EXPECT_THAT(ReadFd(rfd.get(), &c, 1), SyscallSucceedsWithValue(0));
-}
-
-TEST(SigtimedwaitTest, IgnoredUnmaskedSignal) {
-  constexpr int kSigno = SIGUSR1;
-  constexpr auto kSigtimedwaitSetupTime = absl::Seconds(2);
-  constexpr auto kSigtimedwaitTimeout = absl::Seconds(5);
-  ASSERT_GT(kSigtimedwaitTimeout, kSigtimedwaitSetupTime);
-
-  // Ensure that kSigno is ignored, and unmasked on this thread.
-  struct sigaction sa = {};
-  sa.sa_handler = SIG_IGN;
-  const auto scoped_sigaction =
-      ASSERT_NO_ERRNO_AND_VALUE(ScopedSigaction(kSigno, sa));
-  sigset_t mask;
-  sigemptyset(&mask);
-  sigaddset(&mask, kSigno);
-  auto scoped_sigmask =
-      ASSERT_NO_ERRNO_AND_VALUE(ScopedSignalMask(SIG_UNBLOCK, mask));
-
-  // Create a thread which will send us kSigno while we are blocked in
-  // sigtimedwait.
-  pid_t tid = gettid();
-  ScopedThread sigthread([&] {
-    absl::SleepFor(kSigtimedwaitSetupTime);
-    EXPECT_THAT(tgkill(getpid(), tid, kSigno), SyscallSucceeds());
-  });
-
-  // sigtimedwait should not observe kSigno since it is ignored and already
-  // unmasked, causing it to be dropped before it is enqueued.
-  struct timespec timeout_ts = absl::ToTimespec(kSigtimedwaitTimeout);
-  EXPECT_THAT(RetryEINTR(sigtimedwait)(&mask, nullptr, &timeout_ts),
-              SyscallFailsWithErrno(EAGAIN));
-}
-
-TEST(SigtimedwaitTest, IgnoredMaskedSignal) {
-  constexpr int kSigno = SIGUSR1;
-  constexpr auto kSigtimedwaitSetupTime = absl::Seconds(2);
-  constexpr auto kSigtimedwaitTimeout = absl::Seconds(5);
-  ASSERT_GT(kSigtimedwaitTimeout, kSigtimedwaitSetupTime);
-
-  // Ensure that kSigno is ignored, and masked on this thread.
-  struct sigaction sa = {};
-  sa.sa_handler = SIG_IGN;
-  const auto scoped_sigaction =
-      ASSERT_NO_ERRNO_AND_VALUE(ScopedSigaction(kSigno, sa));
-  sigset_t mask;
-  sigemptyset(&mask);
-  sigaddset(&mask, kSigno);
-  auto scoped_sigmask =
-      ASSERT_NO_ERRNO_AND_VALUE(ScopedSignalMask(SIG_BLOCK, mask));
-
-  // Create a thread which will send us kSigno while we are blocked in
-  // sigtimedwait.
-  pid_t tid = gettid();
-  ScopedThread sigthread([&] {
-    absl::SleepFor(kSigtimedwaitSetupTime);
-    EXPECT_THAT(tgkill(getpid(), tid, kSigno), SyscallSucceeds());
-  });
-
-  // sigtimedwait should observe kSigno since it is normally masked, causing it
-  // to be enqueued despite being ignored.
-  struct timespec timeout_ts = absl::ToTimespec(kSigtimedwaitTimeout);
-  EXPECT_THAT(RetryEINTR(sigtimedwait)(&mask, nullptr, &timeout_ts),
-              SyscallSucceedsWithValue(kSigno));
-}
-
-}  // namespace
-
-}  // namespace testing
-}  // namespace gvisor
-
-int main(int argc, char** argv) {
-  // These tests depend on delivering SIGALRM/SIGCHLD to the main thread or in
-  // sigtimedwait. Block them so that any other threads created by TestInit will
-  // also have them blocked.
-  sigset_t set;
-  sigemptyset(&set);
-  sigaddset(&set, SIGALRM);
-  sigaddset(&set, SIGCHLD);
-  TEST_PCHECK(sigprocmask(SIG_BLOCK, &set, nullptr) == 0);
-
-  gvisor::testing::TestInit(&argc, &argv);
-  return gvisor::testing::RunAllTests();
-}