blob: 080f0cfaa7d81b7e7b58e7a2394425a1a7339afd [file] [log] [blame]
/*
* Copyright (C) 2021 The Android Open Source Project
*
* 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 "perfetto/ext/base/ctrl_c_handler.h"
#include "perfetto/base/build_config.h"
#include "perfetto/base/compiler.h"
#include "perfetto/base/logging.h"
#if PERFETTO_BUILDFLAG(PERFETTO_OS_WIN)
#include <Windows.h>
#include <io.h>
#else
#include <signal.h>
#include <unistd.h>
#endif
namespace perfetto {
namespace base {
namespace {
CtrlCHandlerFunction g_handler = nullptr;
}
void InstallCtrCHandler(CtrlCHandlerFunction handler) {
PERFETTO_CHECK(g_handler == nullptr);
g_handler = handler;
#if PERFETTO_BUILDFLAG(PERFETTO_OS_WIN)
auto trampoline = [](DWORD type) -> int {
if (type == CTRL_C_EVENT) {
g_handler();
return true;
}
return false;
};
::SetConsoleCtrlHandler(trampoline, true);
#elif PERFETTO_BUILDFLAG(PERFETTO_OS_LINUX) || \
PERFETTO_BUILDFLAG(PERFETTO_OS_ANDROID) || \
PERFETTO_BUILDFLAG(PERFETTO_OS_APPLE)
// Setup signal handler.
struct sigaction sa {};
// Glibc headers for sa_sigaction trigger this.
#pragma GCC diagnostic push
#if defined(__clang__)
#pragma GCC diagnostic ignored "-Wdisabled-macro-expansion"
#endif
sa.sa_handler = [](int) { g_handler(); };
sa.sa_flags = static_cast<decltype(sa.sa_flags)>(SA_RESETHAND | SA_RESTART);
#pragma GCC diagnostic pop
sigaction(SIGINT, &sa, nullptr);
sigaction(SIGTERM, &sa, nullptr);
#else
// Do nothing on NaCL and Fuchsia.
ignore_result(handler);
#endif
}
} // namespace base
} // namespace perfetto