summaryrefslogtreecommitdiffhomepage
path: root/test/syscalls/linux/preadv.cc
diff options
context:
space:
mode:
Diffstat (limited to 'test/syscalls/linux/preadv.cc')
-rw-r--r--test/syscalls/linux/preadv.cc94
1 files changed, 0 insertions, 94 deletions
diff --git a/test/syscalls/linux/preadv.cc b/test/syscalls/linux/preadv.cc
deleted file mode 100644
index f7ea44054..000000000
--- a/test/syscalls/linux/preadv.cc
+++ /dev/null
@@ -1,94 +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/syscall.h>
-#include <sys/types.h>
-#include <sys/uio.h>
-#include <sys/wait.h>
-#include <unistd.h>
-
-#include <atomic>
-#include <string>
-
-#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/memory_util.h"
-#include "test/util/temp_path.h"
-#include "test/util/test_util.h"
-#include "test/util/thread_util.h"
-#include "test/util/timer_util.h"
-
-namespace gvisor {
-namespace testing {
-
-namespace {
-
-TEST(PreadvTest, MMConcurrencyStress) {
- // Fill a one-page file with zeroes (the contents don't really matter).
- const auto f = ASSERT_NO_ERRNO_AND_VALUE(TempPath::CreateFileWith(
- /* parent = */ GetAbsoluteTestTmpdir(),
- /* content = */ std::string(kPageSize, 0), TempPath::kDefaultFileMode));
- const FileDescriptor fd = ASSERT_NO_ERRNO_AND_VALUE(Open(f.path(), O_RDONLY));
-
- // Get a one-page private mapping to read to.
- const Mapping m = ASSERT_NO_ERRNO_AND_VALUE(
- MmapAnon(kPageSize, PROT_READ | PROT_WRITE, MAP_PRIVATE));
-
- // Repeatedly fork in a separate thread to force the mapping to become
- // copy-on-write.
- std::atomic<bool> done(false);
- const ScopedThread t([&] {
- while (!done.load()) {
- const pid_t pid = fork();
- TEST_CHECK(pid >= 0);
- if (pid == 0) {
- // In child. The parent was obviously multithreaded, so it's neither
- // safe nor necessary to do much more than exit.
- syscall(SYS_exit_group, 0);
- }
- int status;
- ASSERT_THAT(RetryEINTR(waitpid)(pid, &status, 0),
- SyscallSucceedsWithValue(pid));
- EXPECT_TRUE(WIFEXITED(status) && WEXITSTATUS(status) == 0)
- << "status = " << status;
- }
- });
-
- // Repeatedly read to the mapping.
- struct iovec iov[2];
- iov[0].iov_base = m.ptr();
- iov[0].iov_len = kPageSize / 2;
- iov[1].iov_base = reinterpret_cast<void*>(m.addr() + kPageSize / 2);
- iov[1].iov_len = kPageSize / 2;
- constexpr absl::Duration kTestDuration = absl::Seconds(5);
- const absl::Time end = absl::Now() + kTestDuration;
- while (absl::Now() < end) {
- // Among other causes, save/restore cycles may cause interruptions resulting
- // in partial reads, so we don't expect any particular return value.
- EXPECT_THAT(RetryEINTR(preadv)(fd.get(), iov, 2, 0), SyscallSucceeds());
- }
-
- // Stop the other thread.
- done.store(true);
-
- // The test passes if it neither deadlocks nor crashes the OS.
-}
-
-} // namespace
-
-} // namespace testing
-} // namespace gvisor