1 files changed, 0 insertions, 130 deletions
diff --git a/test/syscalls/linux/concurrency.cc b/test/syscalls/linux/concurrency.cc
deleted file mode 100644
index f2daf49ee..000000000
--- a/test/syscalls/linux/concurrency.cc
+++ /dev/null
@@ -1,130 +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 <atomic>
-
-#include "gtest/gtest.h"
-#include "absl/strings/string_view.h"
-#include "absl/time/clock.h"
-#include "absl/time/time.h"
-#include "benchmark/benchmark.h"
-#include "test/util/platform_util.h"
-#include "test/util/test_util.h"
-#include "test/util/thread_util.h"
-
-namespace gvisor {
-namespace testing {
-namespace {
-
-// Test that a thread that never yields to the OS does not prevent other threads
-// from running.
-TEST(ConcurrencyTest, SingleProcessMultithreaded) {
-  std::atomic<int> a(0);
-
-  ScopedThread t([&a]() {
-    while (!a.load()) {
-    }
-  });
-
-  absl::SleepFor(absl::Seconds(1));
-
-  // We are still able to execute code in this thread. The other hasn't
-  // permanently hung execution in both threads.
-  a.store(1);
-}
-
-// Test that multiple threads in this process continue to execute in parallel,
-// even if an unrelated second process is spawned. Regression test for
-// b/32119508.
-TEST(ConcurrencyTest, MultiProcessMultithreaded) {
-  // In PID 1, start TIDs 1 and 2, and put both to sleep.
-  //
-  // Start PID 3, which spins for 5 seconds, then exits.
-  //
-  // TIDs 1 and 2 wake and attempt to Activate, which cannot occur until PID 3
-  // exits.
-  //
-  // Both TIDs 1 and 2 should be woken. If they are not both woken, the test
-  // hangs.
-  //
-  // This is all fundamentally racy. If we are failing to wake all threads, the
-  // expectation is that this test becomes flaky, rather than consistently
-  // failing.
-  //
-  // If additional background threads fail to block, we may never schedule the
-  // child, at which point this test effectively becomes
-  // MultiProcessConcurrency. That's not expected to occur.
-
-  std::atomic<int> a(0);
-  ScopedThread t([&a]() {
-    // Block so that PID 3 can execute and we can wait on its exit.
-    absl::SleepFor(absl::Seconds(1));
-    while (!a.load()) {
-    }
-  });
-
-  pid_t child_pid = fork();
-  if (child_pid == 0) {
-    // Busy wait without making any blocking syscalls.
-    auto end = absl::Now() + absl::Seconds(5);
-    while (absl::Now() < end) {
-    }
-    _exit(0);
-  }
-  ASSERT_THAT(child_pid, SyscallSucceeds());
-
-  absl::SleepFor(absl::Seconds(1));
-
-  // If only TID 1 is woken, thread.Join will hang.
-  // If only TID 2 is woken, both will hang.
-  a.store(1);
-  t.Join();
-
-  int status = 0;
-  EXPECT_THAT(RetryEINTR(waitpid)(child_pid, &status, 0), SyscallSucceeds());
-  EXPECT_TRUE(WIFEXITED(status));
-  EXPECT_EQ(WEXITSTATUS(status), 0);
-}
-
-// Test that multiple processes can execute concurrently, even if one process
-// never yields.
-TEST(ConcurrencyTest, MultiProcessConcurrency) {
-  SKIP_IF(PlatformSupportMultiProcess() == PlatformSupport::NotSupported);
-
-  pid_t child_pid = fork();
-  if (child_pid == 0) {
-    while (true) {
-      int x = 0;
-      benchmark::DoNotOptimize(x);  // Don't optimize this loop away.
-    }
-  }
-  ASSERT_THAT(child_pid, SyscallSucceeds());
-
-  absl::SleepFor(absl::Seconds(5));
-
-  // We are still able to execute code in this process. The other hasn't
-  // permanently hung execution in both processes.
-  ASSERT_THAT(kill(child_pid, SIGKILL), SyscallSucceeds());
-  int status = 0;
-
-  ASSERT_THAT(RetryEINTR(waitpid)(child_pid, &status, 0), SyscallSucceeds());
-  ASSERT_TRUE(WIFSIGNALED(status));
-  ASSERT_EQ(WTERMSIG(status), SIGKILL);
-}
-
-}  // namespace
-}  // namespace testing
-}  // namespace gvisor