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#include "StarSignalHandler.hpp"
#include <signal.h>
namespace Star {
struct SignalHandlerImpl {
bool handlingFatal;
bool handlingInterrupt;
bool interrupted;
SignalHandlerImpl() : handlingFatal(false), handlingInterrupt(false), interrupted(false) {}
~SignalHandlerImpl() {
setHandleFatal(false);
setHandleInterrupt(false);
}
void setHandleFatal(bool b) {
handlingFatal = b;
if (handlingFatal) {
signal(SIGSEGV, handleFatal);
signal(SIGILL, handleFatal);
signal(SIGFPE, handleFatal);
signal(SIGBUS, handleFatal);
} else {
signal(SIGSEGV, SIG_DFL);
signal(SIGILL, SIG_DFL);
signal(SIGFPE, SIG_DFL);
signal(SIGBUS, SIG_DFL);
}
}
void setHandleInterrupt(bool b) {
handlingInterrupt = b;
if (handlingInterrupt)
signal(SIGINT, handleInterrupt);
else
signal(SIGINT, SIG_DFL);
}
static void handleFatal(int signum) {
if (signum == SIGSEGV)
fatalError("Segfault Encountered!", true);
else if (signum == SIGILL)
fatalError("Illegal Instruction Encountered!", true);
else if (signum == SIGFPE)
fatalError("Floating Point Exception Encountered!", true);
else if (signum == SIGBUS)
fatalError("Bus Error Encountered!", true);
}
static void handleInterrupt(int) {
if (SignalHandler::s_singleton)
SignalHandler::s_singleton->interrupted = true;
}
};
SignalHandlerImplUPtr SignalHandler::s_singleton;
SignalHandler::SignalHandler() {
if (s_singleton)
throw StarException("Singleton SignalHandler has been constructed twice!");
s_singleton = make_unique<SignalHandlerImpl>();
}
SignalHandler::~SignalHandler() {
s_singleton.reset();
}
void SignalHandler::setHandleFatal(bool handleFatal) {
s_singleton->setHandleFatal(handleFatal);
}
bool SignalHandler::handlingFatal() const {
return s_singleton->handlingFatal;
}
void SignalHandler::setHandleInterrupt(bool handleInterrupt) {
s_singleton->setHandleInterrupt(handleInterrupt);
}
bool SignalHandler::handlingInterrupt() const {
return s_singleton->handlingInterrupt;
}
bool SignalHandler::interruptCaught() const {
return s_singleton->interrupted;
}
}
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