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Handle terminating signals (Gerd Hoffmann)

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This patch makes qemu handle signals better.  It sets the request_shutdown
flag, making the main_loop exit and qemu taking the usual exit route, with
atexit handlers being called and so on, instead of qemu just being killed
by the signal.

To avoid calling vm_start() from the signal handler main_loop() got an
additional check so qemu_system_shutdown_request() works even when the
vm is in stopped state.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5055 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
aliguori 2008-08-21 20:08:03 +00:00
parent 6f382b5ec0
commit 5b08fc106d
3 changed files with 28 additions and 10 deletions
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27
vl.c
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@ -7621,6 +7621,8 @@ static int main_loop(void)
timeout = 0;
}
} else {
if (shutdown_requested)
break;
timeout = 10;
}
#ifdef CONFIG_PROFILER
@ -8185,6 +8187,26 @@ static BOOL WINAPI qemu_ctrl_handler(DWORD type)
#define MAX_NET_CLIENTS 32
#ifndef _WIN32
static void termsig_handler(int signal)
{
qemu_system_shutdown_request();
}
void termsig_setup(void)
{
struct sigaction act;
memset(&act, 0, sizeof(act));
act.sa_handler = termsig_handler;
sigaction(SIGINT, &act, NULL);
sigaction(SIGHUP, &act, NULL);
sigaction(SIGTERM, &act, NULL);
}
#endif
int main(int argc, char **argv)
{
#ifdef CONFIG_GDBSTUB
@ -9073,6 +9095,11 @@ int main(int argc, char **argv)
#endif
}
#ifndef _WIN32
/* must be after terminal init, SDL library changes signal handlers */
termsig_setup();
#endif
/* Maintain compatibility with multiple stdio monitors */
if (!strcmp(monitor_device,"stdio")) {
for (i = 0; i < MAX_SERIAL_PORTS; i++) {