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Diffstat (limited to 'test/syscalls/linux/rtsignal.cc')
-rw-r--r-- | test/syscalls/linux/rtsignal.cc | 171 |
1 files changed, 0 insertions, 171 deletions
diff --git a/test/syscalls/linux/rtsignal.cc b/test/syscalls/linux/rtsignal.cc deleted file mode 100644 index ed27e2566..000000000 --- a/test/syscalls/linux/rtsignal.cc +++ /dev/null @@ -1,171 +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 <unistd.h> - -#include <cerrno> -#include <csignal> - -#include "gtest/gtest.h" -#include "test/util/cleanup.h" -#include "test/util/logging.h" -#include "test/util/posix_error.h" -#include "test/util/signal_util.h" -#include "test/util/test_util.h" - -namespace gvisor { -namespace testing { - -namespace { - -// saved_info is set by the handler. -siginfo_t saved_info; - -// has_saved_info is set to true by the handler. -volatile bool has_saved_info; - -void SigHandler(int sig, siginfo_t* info, void* context) { - // Copy to the given info. - saved_info = *info; - has_saved_info = true; -} - -void ClearSavedInfo() { - // Clear the cached info. - memset(&saved_info, 0, sizeof(saved_info)); - has_saved_info = false; -} - -PosixErrorOr<Cleanup> SetupSignalHandler(int sig) { - struct sigaction sa; - sa.sa_sigaction = SigHandler; - sigfillset(&sa.sa_mask); - sa.sa_flags = SA_SIGINFO; - return ScopedSigaction(sig, sa); -} - -class RtSignalTest : public ::testing::Test { - protected: - void SetUp() override { - action_cleanup_ = ASSERT_NO_ERRNO_AND_VALUE(SetupSignalHandler(SIGUSR1)); - mask_cleanup_ = - ASSERT_NO_ERRNO_AND_VALUE(ScopedSignalMask(SIG_UNBLOCK, SIGUSR1)); - } - - void TearDown() override { ClearSavedInfo(); } - - private: - Cleanup action_cleanup_; - Cleanup mask_cleanup_; -}; - -static int rt_sigqueueinfo(pid_t tgid, int sig, siginfo_t* uinfo) { - int ret; - do { - // NOTE(b/25434735): rt_sigqueueinfo(2) could return EAGAIN for RT signals. - ret = syscall(SYS_rt_sigqueueinfo, tgid, sig, uinfo); - } while (ret == -1 && errno == EAGAIN); - return ret; -} - -TEST_F(RtSignalTest, InvalidTID) { - siginfo_t uinfo; - // Depending on the kernel version, these calls may fail with - // ESRCH (goobunutu machines) or EPERM (production machines). Thus, - // the test simply ensures that they do fail. - EXPECT_THAT(rt_sigqueueinfo(-1, SIGUSR1, &uinfo), SyscallFails()); - EXPECT_FALSE(has_saved_info); - EXPECT_THAT(rt_sigqueueinfo(0, SIGUSR1, &uinfo), SyscallFails()); - EXPECT_FALSE(has_saved_info); -} - -TEST_F(RtSignalTest, InvalidCodes) { - siginfo_t uinfo; - - // We need a child for the code checks to apply. If the process is delivering - // to itself, then it can use whatever codes it wants and they will go - // through. - pid_t child = fork(); - if (child == 0) { - _exit(1); - } - ASSERT_THAT(child, SyscallSucceeds()); - - // These are not allowed for child processes. - uinfo.si_code = 0; // SI_USER. - EXPECT_THAT(rt_sigqueueinfo(child, SIGUSR1, &uinfo), - SyscallFailsWithErrno(EPERM)); - uinfo.si_code = 0x80; // SI_KERNEL. - EXPECT_THAT(rt_sigqueueinfo(child, SIGUSR1, &uinfo), - SyscallFailsWithErrno(EPERM)); - uinfo.si_code = -6; // SI_TKILL. - EXPECT_THAT(rt_sigqueueinfo(child, SIGUSR1, &uinfo), - SyscallFailsWithErrno(EPERM)); - uinfo.si_code = -1; // SI_QUEUE (allowed). - EXPECT_THAT(rt_sigqueueinfo(child, SIGUSR1, &uinfo), SyscallSucceeds()); - - // Join the child process. - EXPECT_THAT(waitpid(child, nullptr, 0), SyscallSucceeds()); -} - -TEST_F(RtSignalTest, ValueDelivered) { - siginfo_t uinfo; - uinfo.si_code = -1; // SI_QUEUE (allowed). - uinfo.si_errno = 0x1234; - - EXPECT_EQ(saved_info.si_errno, 0x0); - EXPECT_THAT(rt_sigqueueinfo(getpid(), SIGUSR1, &uinfo), SyscallSucceeds()); - EXPECT_TRUE(has_saved_info); - EXPECT_EQ(saved_info.si_errno, 0x1234); -} - -TEST_F(RtSignalTest, SignoMatch) { - auto action2_cleanup = ASSERT_NO_ERRNO_AND_VALUE(SetupSignalHandler(SIGUSR2)); - auto mask2_cleanup = - ASSERT_NO_ERRNO_AND_VALUE(ScopedSignalMask(SIG_UNBLOCK, SIGUSR2)); - - siginfo_t uinfo; - uinfo.si_code = -1; // SI_QUEUE (allowed). - - EXPECT_THAT(rt_sigqueueinfo(getpid(), SIGUSR1, &uinfo), SyscallSucceeds()); - EXPECT_TRUE(has_saved_info); - EXPECT_EQ(saved_info.si_signo, SIGUSR1); - - ClearSavedInfo(); - - EXPECT_THAT(rt_sigqueueinfo(getpid(), SIGUSR2, &uinfo), SyscallSucceeds()); - EXPECT_TRUE(has_saved_info); - EXPECT_EQ(saved_info.si_signo, SIGUSR2); -} - -} // namespace - -} // namespace testing -} // namespace gvisor - -int main(int argc, char** argv) { - // These tests depend on delivering SIGUSR1/2 to the main thread (so they can - // synchronously check has_saved_info). Block these so that any other threads - // created by TestInit will also have them blocked. - sigset_t set; - sigemptyset(&set); - sigaddset(&set, SIGUSR1); - sigaddset(&set, SIGUSR2); - TEST_PCHECK(sigprocmask(SIG_BLOCK, &set, nullptr) == 0); - - gvisor::testing::TestInit(&argc, &argv); - return gvisor::testing::RunAllTests(); -} |