diff options
| -rw-r--r-- | src/sig-monitor.c | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/src/sig-monitor.c b/src/sig-monitor.c index aaffaed0..fdaf8c09 100644 --- a/src/sig-monitor.c +++ b/src/sig-monitor.c @@ -24,6 +24,7 @@ #include <time.h> #include <unistd.h> #include <sys/syscall.h> +#include <execinfo.h> #include "sig-monitor.h" #include "verbose.h" @@ -38,6 +39,26 @@ static _Thread_local int thread_timer_set; static _Thread_local timer_t thread_timerid; /* + * Dumps the current stack + */ +static void dumpstack(int crop) +{ + int idx, count; + void *addresses[1000]; + char **locations; + + count = backtrace(addresses, sizeof addresses / sizeof *addresses); + locations = backtrace_symbols(addresses, count); + if (locations == NULL) + ERROR("can't get the backtrace (returned %d addresses)", count); + else { + for (idx = crop; idx < count; idx++) + ERROR("[BACKTRACE %d/%d] %s", idx - crop + 1, count - crop, locations[idx]); + free(locations); + } +} + +/* * Creates a timer for the current thread * * Returns 0 in case of success @@ -118,6 +139,10 @@ static void on_signal_error(int signum) sigset_t sigset; ERROR("ALERT! signal %d received: %s", signum, strsignal(signum)); + if (error_handler == NULL && signum == SIG_FOR_TIMER) + return; + + dumpstack(3); // unlock signal to allow a new signal to come if (error_handler != NULL) { @@ -126,8 +151,6 @@ static void on_signal_error(int signum) sigprocmask(SIG_UNBLOCK, &sigset, 0); longjmp(*error_handler, signum); } - if (signum == SIG_FOR_TIMER) - return; ERROR("Unmonitored signal %d received: %s", signum, strsignal(signum)); exit(2); } |