1 files changed, 0 insertions, 492 deletions
diff --git a/test/syscalls/linux/semaphore.cc b/test/syscalls/linux/semaphore.cc
deleted file mode 100644
index 40c57f543..000000000
--- a/test/syscalls/linux/semaphore.cc
+++ /dev/null
@@ -1,492 +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/ipc.h>
-#include <sys/sem.h>
-#include <sys/types.h>
-
-#include <atomic>
-#include <cerrno>
-#include <ctime>
-
-#include "gmock/gmock.h"
-#include "gtest/gtest.h"
-#include "absl/base/macros.h"
-#include "absl/memory/memory.h"
-#include "absl/synchronization/mutex.h"
-#include "absl/time/clock.h"
-#include "test/util/capability_util.h"
-#include "test/util/test_util.h"
-#include "test/util/thread_util.h"
-
-namespace gvisor {
-namespace testing {
-namespace {
-
-class AutoSem {
- public:
-  explicit AutoSem(int id) : id_(id) {}
-  ~AutoSem() {
-    if (id_ >= 0) {
-      EXPECT_THAT(semctl(id_, 0, IPC_RMID), SyscallSucceeds());
-    }
-  }
-
-  int release() {
-    int old = id_;
-    id_ = -1;
-    return old;
-  }
-
-  int get() { return id_; }
-
- private:
-  int id_ = -1;
-};
-
-TEST(SemaphoreTest, SemGet) {
-  // Test creation and lookup.
-  AutoSem sem(semget(1, 10, IPC_CREAT));
-  ASSERT_THAT(sem.get(), SyscallSucceeds());
-  EXPECT_THAT(semget(1, 10, IPC_CREAT), SyscallSucceedsWithValue(sem.get()));
-  EXPECT_THAT(semget(1, 9, IPC_CREAT), SyscallSucceedsWithValue(sem.get()));
-
-  // Creation and lookup failure cases.
-  EXPECT_THAT(semget(1, 11, IPC_CREAT), SyscallFailsWithErrno(EINVAL));
-  EXPECT_THAT(semget(1, -1, IPC_CREAT), SyscallFailsWithErrno(EINVAL));
-  EXPECT_THAT(semget(1, 10, IPC_CREAT | IPC_EXCL),
-              SyscallFailsWithErrno(EEXIST));
-  EXPECT_THAT(semget(2, 1, 0), SyscallFailsWithErrno(ENOENT));
-  EXPECT_THAT(semget(2, 0, IPC_CREAT), SyscallFailsWithErrno(EINVAL));
-
-  // Private semaphores never conflict.
-  AutoSem sem2(semget(IPC_PRIVATE, 1, 0));
-  AutoSem sem3(semget(IPC_PRIVATE, 1, 0));
-  ASSERT_THAT(sem2.get(), SyscallSucceeds());
-  EXPECT_NE(sem.get(), sem2.get());
-  ASSERT_THAT(sem3.get(), SyscallSucceeds());
-  EXPECT_NE(sem3.get(), sem2.get());
-}
-
-// Tests simple operations that shouldn't block in a single-thread.
-TEST(SemaphoreTest, SemOpSingleNoBlock) {
-  AutoSem sem(semget(IPC_PRIVATE, 1, 0600 | IPC_CREAT));
-  ASSERT_THAT(sem.get(), SyscallSucceeds());
-
-  struct sembuf buf = {};
-  buf.sem_op = 1;
-  ASSERT_THAT(semop(sem.get(), &buf, 1), SyscallSucceeds());
-
-  buf.sem_op = -1;
-  ASSERT_THAT(semop(sem.get(), &buf, 1), SyscallSucceeds());
-
-  buf.sem_op = 0;
-  ASSERT_THAT(semop(sem.get(), &buf, 1), SyscallSucceeds());
-
-  // Error cases with invalid values.
-  ASSERT_THAT(semop(sem.get() + 1, &buf, 1), SyscallFailsWithErrno(EINVAL));
-
-  buf.sem_num = 1;
-  ASSERT_THAT(semop(sem.get(), &buf, 1), SyscallFailsWithErrno(EFBIG));
-
-  ASSERT_THAT(semop(sem.get(), nullptr, 0), SyscallFailsWithErrno(EINVAL));
-}
-
-// Tests multiple operations that shouldn't block in a single-thread.
-TEST(SemaphoreTest, SemOpMultiNoBlock) {
-  AutoSem sem(semget(IPC_PRIVATE, 4, 0600 | IPC_CREAT));
-  ASSERT_THAT(sem.get(), SyscallSucceeds());
-
-  struct sembuf bufs[5] = {};
-  bufs[0].sem_num = 0;
-  bufs[0].sem_op = 10;
-  bufs[0].sem_flg = 0;
-
-  bufs[1].sem_num = 1;
-  bufs[1].sem_op = 2;
-  bufs[1].sem_flg = 0;
-
-  bufs[2].sem_num = 2;
-  bufs[2].sem_op = 3;
-  bufs[2].sem_flg = 0;
-
-  bufs[3].sem_num = 0;
-  bufs[3].sem_op = -5;
-  bufs[3].sem_flg = 0;
-
-  bufs[4].sem_num = 2;
-  bufs[4].sem_op = 2;
-  bufs[4].sem_flg = 0;
-
-  ASSERT_THAT(semop(sem.get(), bufs, ABSL_ARRAYSIZE(bufs)), SyscallSucceeds());
-
-  ASSERT_THAT(semctl(sem.get(), 0, GETVAL), SyscallSucceedsWithValue(5));
-  ASSERT_THAT(semctl(sem.get(), 1, GETVAL), SyscallSucceedsWithValue(2));
-  ASSERT_THAT(semctl(sem.get(), 2, GETVAL), SyscallSucceedsWithValue(5));
-  ASSERT_THAT(semctl(sem.get(), 3, GETVAL), SyscallSucceedsWithValue(0));
-
-  for (auto& b : bufs) {
-    b.sem_op = -b.sem_op;
-  }
-  // 0 and 3 order must be reversed, otherwise it will block.
-  std::swap(bufs[0].sem_op, bufs[3].sem_op);
-  ASSERT_THAT(RetryEINTR(semop)(sem.get(), bufs, ABSL_ARRAYSIZE(bufs)),
-              SyscallSucceeds());
-
-  // All semaphores should be back to 0 now.
-  for (size_t i = 0; i < 4; ++i) {
-    ASSERT_THAT(semctl(sem.get(), i, GETVAL), SyscallSucceedsWithValue(0));
-  }
-}
-
-// Makes a best effort attempt to ensure that operation would block.
-TEST(SemaphoreTest, SemOpBlock) {
-  AutoSem sem(semget(IPC_PRIVATE, 1, 0600 | IPC_CREAT));
-  ASSERT_THAT(sem.get(), SyscallSucceeds());
-
-  std::atomic<int> blocked = ATOMIC_VAR_INIT(1);
-  ScopedThread th([&sem, &blocked] {
-    absl::SleepFor(absl::Milliseconds(100));
-    ASSERT_EQ(blocked.load(), 1);
-
-    struct sembuf buf = {};
-    buf.sem_op = 1;
-    ASSERT_THAT(RetryEINTR(semop)(sem.get(), &buf, 1), SyscallSucceeds());
-  });
-
-  struct sembuf buf = {};
-  buf.sem_op = -1;
-  ASSERT_THAT(RetryEINTR(semop)(sem.get(), &buf, 1), SyscallSucceeds());
-  blocked.store(0);
-}
-
-// Tests that IPC_NOWAIT returns with no wait.
-TEST(SemaphoreTest, SemOpNoBlock) {
-  AutoSem sem(semget(IPC_PRIVATE, 1, 0600 | IPC_CREAT));
-  ASSERT_THAT(sem.get(), SyscallSucceeds());
-
-  struct sembuf buf = {};
-  buf.sem_flg = IPC_NOWAIT;
-
-  buf.sem_op = -1;
-  ASSERT_THAT(semop(sem.get(), &buf, 1), SyscallFailsWithErrno(EAGAIN));
-
-  buf.sem_op = 1;
-  ASSERT_THAT(semop(sem.get(), &buf, 1), SyscallSucceeds());
-
-  buf.sem_op = 0;
-  ASSERT_THAT(semop(sem.get(), &buf, 1), SyscallFailsWithErrno(EAGAIN));
-}
-
-// Test runs 2 threads, one signals the other waits the same number of times.
-TEST(SemaphoreTest, SemOpSimple) {
-  AutoSem sem(semget(IPC_PRIVATE, 1, 0600 | IPC_CREAT));
-  ASSERT_THAT(sem.get(), SyscallSucceeds());
-
-  constexpr size_t kLoops = 100;
-  ScopedThread th([&sem] {
-    struct sembuf buf = {};
-    buf.sem_op = 1;
-    for (size_t i = 0; i < kLoops; i++) {
-      // Sleep to prevent making all increments in one shot without letting
-      // the waiter wait.
-      absl::SleepFor(absl::Milliseconds(1));
-      ASSERT_THAT(semop(sem.get(), &buf, 1), SyscallSucceeds());
-    }
-  });
-
-  struct sembuf buf = {};
-  buf.sem_op = -1;
-  for (size_t i = 0; i < kLoops; i++) {
-    ASSERT_THAT(RetryEINTR(semop)(sem.get(), &buf, 1), SyscallSucceeds());
-  }
-}
-
-// Tests that semaphore can be removed while there are waiters.
-// NoRandomSave: Test relies on timing that random save throws off.
-TEST(SemaphoreTest, SemOpRemoveWithWaiter_NoRandomSave) {
-  AutoSem sem(semget(IPC_PRIVATE, 2, 0600 | IPC_CREAT));
-  ASSERT_THAT(sem.get(), SyscallSucceeds());
-
-  ScopedThread th([&sem] {
-    absl::SleepFor(absl::Milliseconds(250));
-    ASSERT_THAT(semctl(sem.release(), 0, IPC_RMID), SyscallSucceeds());
-  });
-
-  // This must happen before IPC_RMID runs above. Otherwise it fails with EINVAL
-  // instead because the semaphore has already been removed.
-  struct sembuf buf = {};
-  buf.sem_op = -1;
-  ASSERT_THAT(RetryEINTR(semop)(sem.get(), &buf, 1),
-              SyscallFailsWithErrno(EIDRM));
-}
-
-// Semaphore isn't fair. It will execute any waiter that can satisfy the
-// request even if it gets in front of other waiters.
-TEST(SemaphoreTest, SemOpBestFitExecution) {
-  AutoSem sem(semget(IPC_PRIVATE, 1, 0600 | IPC_CREAT));
-  ASSERT_THAT(sem.get(), SyscallSucceeds());
-
-  ScopedThread th([&sem] {
-    struct sembuf buf = {};
-    buf.sem_op = -2;
-    ASSERT_THAT(RetryEINTR(semop)(sem.get(), &buf, 1), SyscallFails());
-    // Ensure that wait will only unblock when the semaphore is removed. On
-    // EINTR retry it may race with deletion and return EINVAL.
-    ASSERT_TRUE(errno == EIDRM || errno == EINVAL) << "errno=" << errno;
-  });
-
-  // Ensures that '-1' below will unblock even though '-10' above is waiting
-  // for the same semaphore.
-  for (size_t i = 0; i < 10; ++i) {
-    struct sembuf buf = {};
-    buf.sem_op = 1;
-    ASSERT_THAT(RetryEINTR(semop)(sem.get(), &buf, 1), SyscallSucceeds());
-
-    absl::SleepFor(absl::Milliseconds(10));
-
-    buf.sem_op = -1;
-    ASSERT_THAT(RetryEINTR(semop)(sem.get(), &buf, 1), SyscallSucceeds());
-  }
-
-  ASSERT_THAT(semctl(sem.release(), 0, IPC_RMID), SyscallSucceeds());
-}
-
-// Executes random operations in multiple threads and verify correctness.
-TEST(SemaphoreTest, SemOpRandom) {
-  // Don't do cooperative S/R tests because there are too many syscalls in
-  // this test,
-  const DisableSave ds;
-
-  AutoSem sem(semget(IPC_PRIVATE, 1, 0600 | IPC_CREAT));
-  ASSERT_THAT(sem.get(), SyscallSucceeds());
-
-  // Protects the seed below.
-  absl::Mutex mutex;
-  uint32_t seed = time(nullptr);
-
-  int count = 0;      // Tracks semaphore value.
-  bool done = false;  // Tells waiters to stop after signal threads are done.
-
-  // These threads will wait in a loop.
-  std::unique_ptr<ScopedThread> decs[5];
-  for (auto& dec : decs) {
-    dec = absl::make_unique<ScopedThread>([&sem, &mutex, &count, &seed, &done] {
-      for (size_t i = 0; i < 500; ++i) {
-        int16_t val;
-        {
-          absl::MutexLock l(&mutex);
-          if (done) {
-            return;
-          }
-          val = (rand_r(&seed) % 10 + 1);  // Rand between 1 and 10.
-          count -= val;
-        }
-        struct sembuf buf = {};
-        buf.sem_op = -val;
-        ASSERT_THAT(RetryEINTR(semop)(sem.get(), &buf, 1), SyscallSucceeds());
-        absl::SleepFor(absl::Milliseconds(val * 2));
-      }
-    });
-  }
-
-  // These threads will wait for zero in a loop.
-  std::unique_ptr<ScopedThread> zeros[5];
-  for (auto& zero : zeros) {
-    zero = absl::make_unique<ScopedThread>([&sem, &mutex, &done] {
-      for (size_t i = 0; i < 500; ++i) {
-        {
-          absl::MutexLock l(&mutex);
-          if (done) {
-            return;
-          }
-        }
-        struct sembuf buf = {};
-        buf.sem_op = 0;
-        ASSERT_THAT(RetryEINTR(semop)(sem.get(), &buf, 1), SyscallSucceeds());
-        absl::SleepFor(absl::Milliseconds(10));
-      }
-    });
-  }
-
-  // These threads will signal in a loop.
-  std::unique_ptr<ScopedThread> incs[5];
-  for (auto& inc : incs) {
-    inc = absl::make_unique<ScopedThread>([&sem, &mutex, &count, &seed] {
-      for (size_t i = 0; i < 500; ++i) {
-        int16_t val;
-        {
-          absl::MutexLock l(&mutex);
-          val = (rand_r(&seed) % 10 + 1);  // Rand between 1 and 10.
-          count += val;
-        }
-        struct sembuf buf = {};
-        buf.sem_op = val;
-        ASSERT_THAT(semop(sem.get(), &buf, 1), SyscallSucceeds());
-        absl::SleepFor(absl::Milliseconds(val * 2));
-      }
-    });
-  }
-
-  // First wait for signal threads to be done.
-  for (auto& inc : incs) {
-    inc->Join();
-  }
-
-  // Now there could be waiters blocked (remember operations are random).
-  // Notify waiters that we're done and signal semaphore just the right amount.
-  {
-    absl::MutexLock l(&mutex);
-    done = true;
-    struct sembuf buf = {};
-    buf.sem_op = -count;
-    ASSERT_THAT(semop(sem.get(), &buf, 1), SyscallSucceeds());
-  }
-
-  // Now all waiters should unblock and exit.
-  for (auto& dec : decs) {
-    dec->Join();
-  }
-  for (auto& zero : zeros) {
-    zero->Join();
-  }
-}
-
-TEST(SemaphoreTest, SemOpNamespace) {
-  SKIP_IF(!ASSERT_NO_ERRNO_AND_VALUE(HaveCapability(CAP_SYS_ADMIN)));
-
-  AutoSem sem(semget(123, 1, 0600 | IPC_CREAT | IPC_EXCL));
-  ASSERT_THAT(sem.get(), SyscallSucceeds());
-
-  ScopedThread([]() {
-    EXPECT_THAT(unshare(CLONE_NEWIPC), SyscallSucceeds());
-    AutoSem sem(semget(123, 1, 0600 | IPC_CREAT | IPC_EXCL));
-    ASSERT_THAT(sem.get(), SyscallSucceeds());
-  });
-}
-
-TEST(SemaphoreTest, SemCtlVal) {
-  AutoSem sem(semget(IPC_PRIVATE, 1, 0600 | IPC_CREAT));
-  ASSERT_THAT(sem.get(), SyscallSucceeds());
-
-  // Semaphore must start with 0.
-  EXPECT_THAT(semctl(sem.get(), 0, GETVAL), SyscallSucceedsWithValue(0));
-
-  // Increase value and ensure waiters are woken up.
-  ScopedThread th([&sem] {
-    struct sembuf buf = {};
-    buf.sem_op = -10;
-    ASSERT_THAT(RetryEINTR(semop)(sem.get(), &buf, 1), SyscallSucceeds());
-  });
-
-  ASSERT_THAT(semctl(sem.get(), 0, SETVAL, 9), SyscallSucceeds());
-  EXPECT_THAT(semctl(sem.get(), 0, GETVAL), SyscallSucceedsWithValue(9));
-
-  ASSERT_THAT(semctl(sem.get(), 0, SETVAL, 20), SyscallSucceeds());
-  const int value = semctl(sem.get(), 0, GETVAL);
-  // 10 or 20 because it could have raced with waiter above.
-  EXPECT_TRUE(value == 10 || value == 20) << "value=" << value;
-  th.Join();
-
-  // Set it back to 0 and ensure that waiters are woken up.
-  ScopedThread thZero([&sem] {
-    struct sembuf buf = {};
-    buf.sem_op = 0;
-    ASSERT_THAT(RetryEINTR(semop)(sem.get(), &buf, 1), SyscallSucceeds());
-  });
-  ASSERT_THAT(semctl(sem.get(), 0, SETVAL, 0), SyscallSucceeds());
-  EXPECT_THAT(semctl(sem.get(), 0, GETVAL), SyscallSucceedsWithValue(0));
-  thZero.Join();
-}
-
-TEST(SemaphoreTest, SemCtlValAll) {
-  AutoSem sem(semget(IPC_PRIVATE, 3, 0600 | IPC_CREAT));
-  ASSERT_THAT(sem.get(), SyscallSucceeds());
-
-  // Semaphores must start with 0.
-  uint16_t get[3] = {10, 10, 10};
-  EXPECT_THAT(semctl(sem.get(), 1, GETALL, get), SyscallSucceedsWithValue(0));
-  for (auto v : get) {
-    EXPECT_EQ(v, 0);
-  }
-
-  // SetAll and check that they were set.
-  uint16_t vals[3] = {0, 10, 20};
-  EXPECT_THAT(semctl(sem.get(), 1, SETALL, vals), SyscallSucceedsWithValue(0));
-  EXPECT_THAT(semctl(sem.get(), 1, GETALL, get), SyscallSucceedsWithValue(0));
-  for (size_t i = 0; i < ABSL_ARRAYSIZE(vals); ++i) {
-    EXPECT_EQ(get[i], vals[i]);
-  }
-
-  EXPECT_THAT(semctl(sem.get(), 1, SETALL, nullptr),
-              SyscallFailsWithErrno(EFAULT));
-}
-
-TEST(SemaphoreTest, SemCtlGetPid) {
-  AutoSem sem(semget(IPC_PRIVATE, 1, 0600 | IPC_CREAT));
-  ASSERT_THAT(sem.get(), SyscallSucceeds());
-
-  ASSERT_THAT(semctl(sem.get(), 0, SETVAL, 1), SyscallSucceeds());
-  EXPECT_THAT(semctl(sem.get(), 0, GETPID), SyscallSucceedsWithValue(getpid()));
-}
-
-TEST(SemaphoreTest, SemCtlGetPidFork) {
-  AutoSem sem(semget(IPC_PRIVATE, 1, 0600 | IPC_CREAT));
-  ASSERT_THAT(sem.get(), SyscallSucceeds());
-
-  const pid_t child_pid = fork();
-  if (child_pid == 0) {
-    ASSERT_THAT(semctl(sem.get(), 0, SETVAL, 1), SyscallSucceeds());
-    ASSERT_THAT(semctl(sem.get(), 0, GETPID),
-                SyscallSucceedsWithValue(getpid()));
-
-    _exit(0);
-  }
-  ASSERT_THAT(child_pid, SyscallSucceeds());
-
-  int status;
-  ASSERT_THAT(RetryEINTR(waitpid)(child_pid, &status, 0),
-              SyscallSucceedsWithValue(child_pid));
-  EXPECT_TRUE(WIFEXITED(status) && WEXITSTATUS(status) == 0)
-      << " status " << status;
-}
-
-TEST(SemaphoreTest, SemIpcSet) {
-  // Drop CAP_IPC_OWNER which allows us to bypass semaphore permissions.
-  ASSERT_NO_ERRNO(SetCapability(CAP_IPC_OWNER, false));
-
-  AutoSem sem(semget(IPC_PRIVATE, 1, 0600 | IPC_CREAT));
-  ASSERT_THAT(sem.get(), SyscallSucceeds());
-
-  struct semid_ds semid = {};
-  semid.sem_perm.uid = getuid();
-  semid.sem_perm.gid = getgid();
-
-  // Make semaphore readonly and check that signal fails.
-  semid.sem_perm.mode = 0400;
-  EXPECT_THAT(semctl(sem.get(), 0, IPC_SET, &semid), SyscallSucceeds());
-  struct sembuf buf = {};
-  buf.sem_op = 1;
-  ASSERT_THAT(semop(sem.get(), &buf, 1), SyscallFailsWithErrno(EACCES));
-
-  // Make semaphore writeonly and check that wait for zero fails.
-  semid.sem_perm.mode = 0200;
-  EXPECT_THAT(semctl(sem.get(), 0, IPC_SET, &semid), SyscallSucceeds());
-  buf.sem_op = 0;
-  ASSERT_THAT(semop(sem.get(), &buf, 1), SyscallFailsWithErrno(EACCES));
-}
-
-}  // namespace
-}  // namespace testing
-}  // namespace gvisor