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/***************************************************************************
* Copyright 2012 BMW Car IT GmbH
* Copyright (C) 2012 DENSO CORPORATION and Robert Bosch Car Multimedia Gmbh
*
*
* 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 "SignalHandler.h"
#include "Log.h"
#include "config.h"
#include <signal.h>
#include <stdlib.h> // exit
#include <pthread.h> // mutex
#ifdef HAVE_EXECINFO_H
#include <execinfo.h>
#endif
//===========================================================================
// global variables
//===========================================================================
static pthread_mutex_t gShutdownReceived = PTHREAD_MUTEX_INITIALIZER;
//===========================================================================
// Prototypes
//===========================================================================
void incomingSignalCallback(int sig);
//===========================================================================
// class implementation
//===========================================================================
SignalHandler::SignalHandler()
{
LOG_DEBUG("LayerManagerService", "Enabled signal handling.");
pthread_mutex_lock(&gShutdownReceived); // no shutdown event received
signal(SIGBUS, incomingSignalCallback);
signal(SIGSEGV, incomingSignalCallback);
signal(SIGTERM, incomingSignalCallback);
signal(SIGINT, incomingSignalCallback);
signal(SIGABRT, incomingSignalCallback);
}
SignalHandler::~SignalHandler()
{
LOG_DEBUG("LayerManagerService", "Disabled signal handling.");
signal(SIGBUS, SIG_DFL);
signal(SIGSEGV, SIG_DFL);
signal(SIGTERM, SIG_DFL);
signal(SIGINT, SIG_DFL);
signal(SIGABRT, SIG_DFL);
}
void SignalHandler::waitForShutdownSignal()
{
// this mutex is unlocked by the signal handler callback routine
// e.g. on incoming SIGTERM or SIGABRT
pthread_mutex_lock(&gShutdownReceived);
pthread_mutex_unlock(&gShutdownReceived);
}
//===========================================================================
// signal handling functions
//===========================================================================
void printStackTrace()
{
#ifdef HAVE_BACKTRACE
const int maxStackSize = 64;
void* stack[maxStackSize];
size_t count = backtrace(stack, maxStackSize);
char **lines = backtrace_symbols(stack, count);
LOG_INFO("LayerManagerService", "--------------------------------------------------");
for (unsigned int i = 0; i < count; ++i)
{
LOG_INFO("LayerManagerService", "Stack-Trace [" << i << "]: " << lines[i]);
}
LOG_INFO("LayerManagerService", "--------------------------------------------------");
#endif
LOG_INFO("LayerManagerService", "Exiting application.")
exit(-1);
}
void incomingSignalCallback(int sig)
{
switch (sig)
{
case SIGTERM:
LOG_INFO("LayerManagerService", "Signal SIGTERM received. Shutting down.");
pthread_mutex_unlock(&gShutdownReceived);
break;
case SIGINT:
LOG_INFO("LayerManagerService", "Signal SIGINT received. Shutting down.");
pthread_mutex_unlock(&gShutdownReceived);
break;
case SIGBUS:
LOG_ERROR("LayerManagerService", "Signal SIGBUS received. Shutting down.");
printStackTrace();
pthread_mutex_unlock(&gShutdownReceived);
break;
case SIGSEGV:
LOG_ERROR("LayerManagerService", "Signal SIGSEGV received. Shutting down.");
printStackTrace();
pthread_mutex_unlock(&gShutdownReceived);
break;
case SIGABRT:
LOG_ERROR("LayerManagerService", "Signal SIGABRT received. Shutting down.");
printStackTrace();
pthread_mutex_unlock(&gShutdownReceived);
break;
default:
LOG_INFO("LayerManagerService", "Signal " << sig << " received.");
break;
}
}
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