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fix(SingleApplication): remove crash handler and deal only with SIGINT

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This commit is contained in:
Ronan Abhamon 2018-12-27 14:31:21 +01:00
parent 371d8c6599
commit 6b6697f729
2 changed files with 5 additions and 62 deletions
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64
src/app/single-application/SingleApplication.cpp
View file

@ -35,7 +35,6 @@
#ifdef Q_OS_UNIX
#include <signal.h>
#include <unistd.h>
#endif // ifdef Q_OS_UNIX
#ifdef Q_OS_WIN
@ -137,10 +136,9 @@ void SingleApplicationPrivate::genBlockServerName (int timeout) {
void SingleApplicationPrivate::startPrimary (bool resetMemory) {
#ifdef Q_OS_UNIX
// Handle any further termination signals to ensure the
// QSharedMemory block is deleted even if the process crashes
crashHandler();
signal(SIGINT, SingleApplicationPrivate::terminate);
#endif // ifdef Q_OS_UNIX
// Successful creation means that no main process exists
// So we start a QLocalServer to listen for connections
QLocalServer::removeServer(blockServerName);
@ -180,9 +178,7 @@ void SingleApplicationPrivate::startPrimary (bool resetMemory) {
void SingleApplicationPrivate::startSecondary () {
#ifdef Q_OS_UNIX
// Handle any further termination signals to ensure the
// QSharedMemory block is deleted even if the process crashes
crashHandler();
signal(SIGINT, SingleApplicationPrivate::terminate);
#endif // ifdef Q_OS_UNIX
}
@ -224,60 +220,10 @@ void SingleApplicationPrivate::connectToPrimary (int msecs, char connectionType)
}
#ifdef Q_OS_UNIX
void SingleApplicationPrivate::crashHandler () {
// This guarantees the program will work even with multiple
// instances of SingleApplication in different threads.
// Which in my opinion is idiotic, but lets handle that too.
{
sharedMemMutex.lock();
sharedMem.append(this);
sharedMemMutex.unlock();
}
// Handle any further termination signals to ensure the
// QSharedMemory block is deleted even if the process crashes
signal(SIGHUP, SingleApplicationPrivate::terminate); // 1
signal(SIGINT, SingleApplicationPrivate::terminate); // 2
signal(SIGQUIT, SingleApplicationPrivate::terminate); // 3
signal(SIGILL, SingleApplicationPrivate::terminate); // 4
signal(SIGABRT, SingleApplicationPrivate::terminate); // 6
signal(SIGFPE, SingleApplicationPrivate::terminate); // 8
signal(SIGBUS, SingleApplicationPrivate::terminate); // 10
signal(SIGSEGV, SingleApplicationPrivate::terminate); // 11
signal(SIGSYS, SingleApplicationPrivate::terminate); // 12
signal(SIGPIPE, SingleApplicationPrivate::terminate); // 13
signal(SIGALRM, SingleApplicationPrivate::terminate); // 14
signal(SIGTERM, SingleApplicationPrivate::terminate); // 15
signal(SIGXCPU, SingleApplicationPrivate::terminate); // 24
signal(SIGXFSZ, SingleApplicationPrivate::terminate); // 25
}
void SingleApplicationPrivate::terminate (int signum) {
if (signum == SIGINT) {
SingleApplication::instance()->quit();
return;
}
// Dangerous signals. Exit directly after shared memory destruction.
// Don't touch sockets => avoid dead locks.
for (int crashSig : { SIGABRT, SIGBUS, SIGSEGV })
if (signum == crashSig) {
for (SingleApplicationPrivate *d : sharedMem)
delete d->memory;
goto forceExit;
}
while (!sharedMem.empty()) {
delete sharedMem.back();
sharedMem.pop_back();
}
forceExit:
::exit(128 + signum);
Q_UNUSED(signum);
SingleApplication::instance()->quit();
}
QList<SingleApplicationPrivate *> SingleApplicationPrivate::sharedMem;
QMutex SingleApplicationPrivate::sharedMemMutex;
#endif // ifdef Q_OS_UNIX
/**

3
src/app/single-application/SingleApplicationPrivate.hpp
View file

@ -59,10 +59,7 @@ public:
void connectToPrimary (int msecs, char connectionType);
#ifdef Q_OS_UNIX
void crashHandler ();
static void terminate (int signum);
static QList<SingleApplicationPrivate *> sharedMem;
static QMutex sharedMemMutex;
#endif // ifdef Q_OS_UNIX
QSharedMemory *memory;