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Diffstat (limited to 'test/syscalls/linux/ppoll.cc')
-rw-r--r-- | test/syscalls/linux/ppoll.cc | 155 |
1 files changed, 0 insertions, 155 deletions
diff --git a/test/syscalls/linux/ppoll.cc b/test/syscalls/linux/ppoll.cc deleted file mode 100644 index 8245a11e8..000000000 --- a/test/syscalls/linux/ppoll.cc +++ /dev/null @@ -1,155 +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 <poll.h> -#include <signal.h> -#include <sys/syscall.h> -#include <sys/time.h> -#include <unistd.h> - -#include "gtest/gtest.h" -#include "absl/time/time.h" -#include "test/syscalls/linux/base_poll_test.h" -#include "test/util/signal_util.h" -#include "test/util/test_util.h" - -namespace gvisor { -namespace testing { -namespace { - -// Linux and glibc have a different idea of the sizeof sigset_t. When calling -// the syscall directly, use what the kernel expects. -unsigned kSigsetSize = SIGRTMAX / 8; - -// Linux ppoll(2) differs from the glibc wrapper function in that Linux updates -// the timeout with the amount of time remaining. In order to test this behavior -// we need to use the syscall directly. -int syscallPpoll(struct pollfd* fds, nfds_t nfds, struct timespec* timeout_ts, - const sigset_t* sigmask, unsigned mask_size) { - return syscall(SYS_ppoll, fds, nfds, timeout_ts, sigmask, mask_size); -} - -class PpollTest : public BasePollTest { - protected: - void SetUp() override { BasePollTest::SetUp(); } - void TearDown() override { BasePollTest::TearDown(); } -}; - -TEST_F(PpollTest, InvalidFds) { - // fds is invalid because it's null, but we tell ppoll the length is non-zero. - struct timespec timeout = {}; - sigset_t sigmask; - TEST_PCHECK(sigemptyset(&sigmask) == 0); - EXPECT_THAT(syscallPpoll(nullptr, 1, &timeout, &sigmask, kSigsetSize), - SyscallFailsWithErrno(EFAULT)); - EXPECT_THAT(syscallPpoll(nullptr, -1, &timeout, &sigmask, kSigsetSize), - SyscallFailsWithErrno(EINVAL)); -} - -// See that when fds is null, ppoll behaves like sleep. -TEST_F(PpollTest, NullFds) { - struct timespec timeout = absl::ToTimespec(absl::Milliseconds(10)); - ASSERT_THAT(syscallPpoll(nullptr, 0, &timeout, nullptr, 0), - SyscallSucceeds()); - EXPECT_EQ(timeout.tv_sec, 0); - EXPECT_EQ(timeout.tv_nsec, 0); -} - -TEST_F(PpollTest, ZeroTimeout) { - struct timespec timeout = {}; - ASSERT_THAT(syscallPpoll(nullptr, 0, &timeout, nullptr, 0), - SyscallSucceeds()); - EXPECT_EQ(timeout.tv_sec, 0); - EXPECT_EQ(timeout.tv_nsec, 0); -} - -// If random S/R interrupts the ppoll, SIGALRM may be delivered before ppoll -// restarts, causing the ppoll to hang forever. -TEST_F(PpollTest, NoTimeout_NoRandomSave) { - // When there's no timeout, ppoll may never return so set a timer. - SetTimer(absl::Milliseconds(100)); - // See that we get interrupted by the timer. - ASSERT_THAT(syscallPpoll(nullptr, 0, nullptr, nullptr, 0), - SyscallFailsWithErrno(EINTR)); - EXPECT_TRUE(TimerFired()); -} - -TEST_F(PpollTest, InvalidTimeoutNegative) { - struct timespec timeout = absl::ToTimespec(absl::Nanoseconds(-1)); - EXPECT_THAT(syscallPpoll(nullptr, 0, &timeout, nullptr, 0), - SyscallFailsWithErrno(EINVAL)); -} - -TEST_F(PpollTest, InvalidTimeoutNotNormalized) { - struct timespec timeout = {0, 1000000001}; - EXPECT_THAT(syscallPpoll(nullptr, 0, &timeout, nullptr, 0), - SyscallFailsWithErrno(EINVAL)); -} - -TEST_F(PpollTest, InvalidMaskSize) { - struct timespec timeout = {}; - sigset_t sigmask; - TEST_PCHECK(sigemptyset(&sigmask) == 0); - EXPECT_THAT(syscallPpoll(nullptr, 0, &timeout, &sigmask, 128), - SyscallFailsWithErrno(EINVAL)); -} - -// Verify that signals blocked by the ppoll mask (that would otherwise be -// allowed) do not interrupt ppoll. -TEST_F(PpollTest, SignalMaskBlocksSignal) { - absl::Duration duration(absl::Seconds(30)); - struct timespec timeout = absl::ToTimespec(duration); - absl::Duration timer_duration(absl::Seconds(10)); - - // Call with a mask that blocks SIGALRM. See that ppoll is not interrupted - // (i.e. returns 0) and that upon completion, the timer has fired. - sigset_t mask; - ASSERT_THAT(sigprocmask(0, nullptr, &mask), SyscallSucceeds()); - TEST_PCHECK(sigaddset(&mask, SIGALRM) == 0); - SetTimer(timer_duration); - MaybeSave(); - ASSERT_FALSE(TimerFired()); - ASSERT_THAT(syscallPpoll(nullptr, 0, &timeout, &mask, kSigsetSize), - SyscallSucceeds()); - EXPECT_TRUE(TimerFired()); - EXPECT_EQ(absl::DurationFromTimespec(timeout), absl::Duration()); -} - -// Verify that signals allowed by the ppoll mask (that would otherwise be -// blocked) interrupt ppoll. -TEST_F(PpollTest, SignalMaskAllowsSignal) { - absl::Duration duration(absl::Seconds(30)); - struct timespec timeout = absl::ToTimespec(duration); - absl::Duration timer_duration(absl::Seconds(10)); - - sigset_t mask; - ASSERT_THAT(sigprocmask(0, nullptr, &mask), SyscallSucceeds()); - - // Block SIGALRM. - auto cleanup = - ASSERT_NO_ERRNO_AND_VALUE(ScopedSignalMask(SIG_BLOCK, SIGALRM)); - - // Call with a mask that unblocks SIGALRM. See that ppoll is interrupted. - SetTimer(timer_duration); - MaybeSave(); - ASSERT_FALSE(TimerFired()); - ASSERT_THAT(syscallPpoll(nullptr, 0, &timeout, &mask, kSigsetSize), - SyscallFailsWithErrno(EINTR)); - EXPECT_TRUE(TimerFired()); - EXPECT_GT(absl::DurationFromTimespec(timeout), absl::Duration()); -} - -} // namespace -} // namespace testing -} // namespace gvisor |