shaba/libvirt
1
0
Fork 0
mirror of https://gitlab.com/libvirt/libvirt.git synced 2025-03-13 08:58:33 +03:00
Code Releases Activity

Dump the debug buffer to libvirtd.log on fatal signal

Browse Source 
In case of imminent crash or upon request (signal USR2),
dump the logging buffer to the libvirtd.log file for
post-mortem analysis
* daemon/libvirtd.c: create a sig_fatal() handler connected to
  SIGFPE SIGSEGV SIGILL SIGABRT SIGBUS and SIGUSR2, just dumping
  the log buffer using virLogEmergencyDumpAll
This commit is contained in:
Daniel Veillard 2011-03-03 17:41:44 +08:00
parent 398553c157
commit a9f35c4863
1 changed files with 32 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
daemon/libvirtd.c
View File

@ -246,6 +246,26 @@ static void sig_handler(int sig, siginfo_t * siginfo,
errno = origerrno;
}
static void sig_fatal(int sig, siginfo_t * siginfo ATTRIBUTE_UNUSED,
void* context ATTRIBUTE_UNUSED) {
struct sigaction sig_action;
int origerrno;
origerrno = errno;
virLogEmergencyDumpAll(sig);
/*
* If the signal is fatal, avoid looping over this handler
* by desactivating it
*/
if (sig != SIGUSR2) {
sig_action.sa_flags = SA_SIGINFO;
sig_action.sa_handler = SIG_IGN;
sigaction(sig, &sig_action, NULL);
}
errno = origerrno;
}
static void qemudDispatchClientEvent(int watch, int fd, int events, void *opaque);
static void qemudDispatchServerEvent(int watch, int fd, int events, void *opaque);
static int qemudStartWorker(struct qemud_server *server, struct qemud_worker *worker);
@ -3046,6 +3066,18 @@ daemonSetupSignals(struct qemud_server *server)
sigaction(SIGQUIT, &sig_action, NULL);
sigaction(SIGTERM, &sig_action, NULL);
/*
* catch fatal errors to dump a log, also hook to USR2 for dynamic
* debugging purposes or testing
*/
sig_action.sa_sigaction = sig_fatal;
sigaction(SIGFPE, &sig_action, NULL);
sigaction(SIGSEGV, &sig_action, NULL);
sigaction(SIGILL, &sig_action, NULL);
sigaction(SIGABRT, &sig_action, NULL);
sigaction(SIGBUS, &sig_action, NULL);
sigaction(SIGUSR2, &sig_action, NULL);
sig_action.sa_handler = SIG_IGN;
sigaction(SIGPIPE, &sig_action, NULL);