76 lines
2.1 KiB
C++
76 lines
2.1 KiB
C++
// Copyright 2018 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include <sys/syscall.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <cerrno>
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#include <csignal>
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#include "gtest/gtest.h"
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#include "test/util/logging.h"
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#include "test/util/test_util.h"
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#include "test/util/thread_util.h"
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namespace gvisor {
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namespace testing {
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namespace {
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static int tkill(pid_t tid, int sig) {
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int ret;
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do {
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// NOTE(b/25434735): tkill(2) could return EAGAIN for RT signals.
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ret = syscall(SYS_tkill, tid, sig);
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} while (ret == -1 && errno == EAGAIN);
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return ret;
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}
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TEST(TkillTest, InvalidTID) {
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EXPECT_THAT(tkill(-1, 0), SyscallFailsWithErrno(EINVAL));
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EXPECT_THAT(tkill(0, 0), SyscallFailsWithErrno(EINVAL));
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}
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TEST(TkillTest, ValidTID) {
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EXPECT_THAT(tkill(gettid(), 0), SyscallSucceeds());
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}
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void SigHandler(int sig, siginfo_t* info, void* context) {
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TEST_CHECK(sig == SIGRTMAX);
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TEST_CHECK(info->si_pid == getpid());
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TEST_CHECK(info->si_uid == getuid());
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TEST_CHECK(info->si_code == SI_TKILL);
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}
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// Test with a real signal.
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TEST(TkillTest, ValidTIDAndRealSignal) {
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struct sigaction sa;
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sa.sa_sigaction = SigHandler;
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sigfillset(&sa.sa_mask);
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sa.sa_flags = SA_SIGINFO;
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ASSERT_THAT(sigaction(SIGRTMAX, &sa, nullptr), SyscallSucceeds());
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// InitGoogle blocks all RT signals, so we need undo it.
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sigset_t unblock;
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sigemptyset(&unblock);
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sigaddset(&unblock, SIGRTMAX);
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ASSERT_THAT(sigprocmask(SIG_UNBLOCK, &unblock, nullptr), SyscallSucceeds());
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EXPECT_THAT(tkill(gettid(), SIGRTMAX), SyscallSucceeds());
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}
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} // namespace
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} // namespace testing
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} // namespace gvisor
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