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//
// SignalHandler.cpp
//
// Library: Foundation
// Package: Threading
// Module: SignalHandler
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/SignalHandler.h"
#if defined(POCO_OS_FAMILY_UNIX) && !defined(POCO_VXWORKS)
#include "Poco/Thread.h"
#include "Poco/NumberFormatter.h"
#include "Poco/Exception.h"
#include <cstdlib>
#include <signal.h>
namespace Poco {
SignalHandler::JumpBufferVec SignalHandler::_jumpBufferVec;
SignalHandler::SignalHandler()
{
JumpBufferVec& jbv = jumpBufferVec();
JumpBuffer buf;
jbv.push_back(buf);
}
SignalHandler::~SignalHandler()
{
jumpBufferVec().pop_back();
}
sigjmp_buf& SignalHandler::jumpBuffer()
{
return jumpBufferVec().back().buf;
}
void SignalHandler::throwSignalException(int sig)
{
switch (sig)
{
case SIGILL:
throw SignalException("Illegal instruction");
case SIGBUS:
throw SignalException("Bus error");
case SIGSEGV:
throw SignalException("Segmentation violation");
case SIGSYS:
throw SignalException("Invalid system call");
default:
throw SignalException(NumberFormatter::formatHex(sig));
}
}
void SignalHandler::install()
{
#ifndef POCO_NO_SIGNAL_HANDLER
struct sigaction sa;
sa.sa_handler = handleSignal;
sa.sa_flags = 0;
sigemptyset(&sa.sa_mask);
sigaction(SIGILL, &sa, 0);
sigaction(SIGBUS, &sa, 0);
sigaction(SIGSEGV, &sa, 0);
sigaction(SIGSYS, &sa, 0);
#endif
}
void SignalHandler::handleSignal(int sig)
{
JumpBufferVec& jb = jumpBufferVec();
if (!jb.empty())
siglongjmp(jb.back().buf, sig);
// Abort if no jump buffer registered
std::abort();
}
SignalHandler::JumpBufferVec& SignalHandler::jumpBufferVec()
{
ThreadImpl* pThread = ThreadImpl::currentImpl();
if (pThread)
return pThread->_jumpBufferVec;
else
return _jumpBufferVec;
}
} // namespace Poco
#endif // POCO_OS_FAMILY_UNIX
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