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//===-- sanitizer_block_signals.cpp ---------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file is a part of sanitizer_common unit tests.
//
//===----------------------------------------------------------------------===//
#include <signal.h>
#include <stdio.h>
#include "gtest/gtest.h"
#include "sanitizer_common/sanitizer_linux.h"
namespace __sanitizer {
#if SANITIZER_LINUX && !SANITIZER_ANDROID
volatile int received_sig = -1;
void signal_handler(int signum) { received_sig = signum; }
TEST(SanitizerCommon, NoBlockSignals) {
// No signals blocked
signal(SIGUSR1, signal_handler);
raise(SIGUSR1);
EXPECT_EQ(received_sig, SIGUSR1);
received_sig = -1;
signal(SIGPIPE, signal_handler);
raise(SIGPIPE);
EXPECT_EQ(received_sig, SIGPIPE);
}
TEST(SanitizerCommon, BlockSignalsPlain) {
// ScopedBlockSignals; SIGUSR1 should be blocked but not SIGPIPE
{
__sanitizer_sigset_t sigset = {};
ScopedBlockSignals block(&sigset);
received_sig = -1;
signal(SIGUSR1, signal_handler);
raise(SIGUSR1);
EXPECT_EQ(received_sig, -1);
received_sig = -1;
signal(SIGPIPE, signal_handler);
raise(SIGPIPE);
EXPECT_EQ(received_sig, SIGPIPE);
}
EXPECT_EQ(received_sig, SIGUSR1);
}
TEST(SanitizerCommon, BlockSignalsExceptPipe) {
// Manually block SIGPIPE; ScopedBlockSignals should not unblock this
sigset_t block_sigset;
sigemptyset(&block_sigset);
sigaddset(&block_sigset, SIGPIPE);
sigprocmask(SIG_BLOCK, &block_sigset, NULL);
{
__sanitizer_sigset_t sigset = {};
ScopedBlockSignals block(&sigset);
received_sig = -1;
signal(SIGPIPE, signal_handler);
raise(SIGPIPE);
EXPECT_EQ(received_sig, -1);
}
sigprocmask(SIG_UNBLOCK, &block_sigset, NULL);
EXPECT_EQ(received_sig, SIGPIPE);
}
#endif // SANITIZER_LINUX && !SANITIZER_ANDROID
} // namespace __sanitizer
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