hcq/MaxScale
hcq/MaxScale
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Merge branch 'hartmut-segfault-handler' of https://github.com/hholzgra/MaxScale into hholzgra-hartmut-segfault-handler

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This commit is contained in:
Mark Riddoch 2014-09-09 11:48:32 +01:00
commit 79e3f93c2d
1 changed files with 154 additions and 1 deletions
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155
server/core/gateway.c
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@ -65,6 +65,8 @@
# include <skygw_utils.h>
# include <log_manager.h>
#include <execinfo.h>
/** for procname */
#define _GNU_SOURCE
@ -189,6 +191,53 @@ sigint_handler (int i)
fprintf(stderr, "\n\nShutting down MaxScale\n\n");
}
int fatal_handling = 0;
static int signal_set (int sig, void (*handler)(int));
static void
sigfatal_handler (int i)
{
if (fatal_handling) {
fprintf(stderr, "Fatal signal %d while backtracing\n", i);
_exit(1);
}
fatal_handling = 1;
fprintf(stderr, "\n\nMaxScale received fatal signal %d\n", i);
LOGIF(LE, (skygw_log_write_flush(
LOGFILE_ERROR,
"Fatal: MaxScale received fatal signal %d. Attempting backtrace.", i)));
{
void *addrs[128];
char **strings= NULL;
int n, count = backtrace(addrs, 128);
char** symbols = backtrace_symbols( addrs, count );
if (symbols) {
for( n = 0; n < count; n++ ) {
LOGIF(LE, (skygw_log_write_flush(
LOGFILE_ERROR,
" %s\n", symbols[n])));
}
free(symbols);
} else {
fprintf(stderr, "\nresolving symbols to error log failed, writing call trace to stderr:\n");
backtrace_symbols_fd(addrs, count, fileno(stderr));
}
}
/* re-raise signal to enforce core dump */
fprintf(stderr, "\n\nWriting core dump\n");
signal_set(i, SIG_DFL);
raise(i);
}
/**
* @node Wraps sigaction calls
*
@ -1080,6 +1129,68 @@ int main(int argc, char **argv)
rc = MAXSCALE_INTERNALERROR;
goto return_main;
}
r = sigdelset(&sigset, SIGSEGV);
if (r != 0)
{
char* logerr = "Failed to delete signal SIGSEGV from the "
"signal set of MaxScale. Exiting.";
eno = errno;
errno = 0;
print_log_n_stderr(true, true, fprerr, logerr, eno);
rc = MAXSCALE_INTERNALERROR;
goto return_main;
}
r = sigdelset(&sigset, SIGABRT);
if (r != 0)
{
char* logerr = "Failed to delete signal SIGABRT from the "
"signal set of MaxScale. Exiting.";
eno = errno;
errno = 0;
print_log_n_stderr(true, true, fprerr, logerr, eno);
rc = MAXSCALE_INTERNALERROR;
goto return_main;
}
r = sigdelset(&sigset, SIGILL);
if (r != 0)
{
char* logerr = "Failed to delete signal SIGILL from the "
"signal set of MaxScale. Exiting.";
eno = errno;
errno = 0;
print_log_n_stderr(true, true, fprerr, logerr, eno);
rc = MAXSCALE_INTERNALERROR;
goto return_main;
}
r = sigdelset(&sigset, SIGFPE);
if (r != 0)
{
char* logerr = "Failed to delete signal SIGFPE from the "
"signal set of MaxScale. Exiting.";
eno = errno;
errno = 0;
print_log_n_stderr(true, true, fprerr, logerr, eno);
rc = MAXSCALE_INTERNALERROR;
goto return_main;
}
#ifdef SIGBUS
r = sigdelset(&sigset, SIGBUS);
if (r != 0)
{
char* logerr = "Failed to delete signal SIGBUS from the "
"signal set of MaxScale. Exiting.";
eno = errno;
errno = 0;
print_log_n_stderr(true, true, fprerr, logerr, eno);
rc = MAXSCALE_INTERNALERROR;
goto return_main;
}
#endif
r = sigprocmask(SIG_SETMASK, &sigset, NULL);
if (r != 0) {
@ -1094,7 +1205,7 @@ int main(int argc, char **argv)
gw_daemonize();
}
/*<
* Set signal handlers for SIGHUP, SIGTERM, and SIGINT.
* Set signal handlers for SIGHUP, SIGTERM, SIGINT and critical signals like SIGSEGV.
*/
{
char* fprerr = "Failed to initialize signal handlers. Exiting.";
@ -1123,6 +1234,48 @@ int main(int argc, char **argv)
"SIGINT. Exiting.");
goto sigset_err;
}
l = signal_set(SIGSEGV, sigfatal_handler);
if (l != 0)
{
logerr = strdup("Failed to set signal handler for "
"SIGSEGV. Exiting.");
goto sigset_err;
}
l = signal_set(SIGABRT, sigfatal_handler);
if (l != 0)
{
logerr = strdup("Failed to set signal handler for "
"SIGABRT. Exiting.");
goto sigset_err;
}
l = signal_set(SIGILL, sigfatal_handler);
if (l != 0)
{
logerr = strdup("Failed to set signal handler for "
"SIGILL. Exiting.");
goto sigset_err;
}
l = signal_set(SIGFPE, sigfatal_handler);
if (l != 0)
{
logerr = strdup("Failed to set signal handler for "
"SIGFPE. Exiting.");
goto sigset_err;
}
#ifdef SIGBUS
l = signal_set(SIGBUS, sigfatal_handler);
if (l != 0)
{
logerr = strdup("Failed to set signal handler for "
"SIGBUS. Exiting.");
goto sigset_err;
}
#endif
sigset_err:
if (l != 0)
{