/*======================================
* CORE : Signal Sub Function
*--------------------------------------*/
static void sig_proc(int sn)
{
static int is_called = 0;
switch (sn) {
case SIGINT:
case SIGTERM:
if (++is_called > 3)
exit(EXIT_SUCCESS);
if( shutdown_callback != NULL )
shutdown_callback();
else
runflag = CORE_ST_STOP;// auto-shutdown
break;
case SIGSEGV:
case SIGFPE:
do_abort();
// Pass the signal to the system's default handler
compat_signal(sn, SIG_DFL);
raise(sn);
break;
#ifndef _WIN32
case SIGXFSZ:
// ignore and allow it to set errno to EFBIG
ShowWarning ("Max file size reached!\n");
//run_flag = 0; // should we quit?
break;
case SIGPIPE:
//ShowInfo ("Broken pipe found... closing socket\n"); // set to eof in socket.c
break; // does nothing here
#endif
}
}
void signals_init (void) {
compat_signal(SIGTERM, sig_proc);
compat_signal(SIGINT, sig_proc);
#ifndef _DEBUG // need unhandled exceptions to debug on Windows
compat_signal(SIGSEGV, sig_proc);
compat_signal(SIGFPE, sig_proc);
#endif
#ifndef _WIN32
compat_signal(SIGILL, SIG_DFL);
compat_signal(SIGXFSZ, sig_proc);
compat_signal(SIGPIPE, sig_proc);
compat_signal(SIGBUS, SIG_DFL);
compat_signal(SIGTRAP, SIG_DFL);
#endif
}
void signals_init (void)
{
compat_signal(SIGTERM, sig_proc);
compat_signal(SIGINT, sig_proc);
// Signal to create coredumps by system when necessary (crash)
compat_signal(SIGSEGV, SIG_DFL);
compat_signal(SIGFPE, SIG_DFL);
compat_signal(SIGILL, SIG_DFL);
#ifndef _WIN32
compat_signal(SIGXFSZ, sig_proc);
compat_signal(SIGPIPE, sig_proc);
compat_signal(SIGBUS, SIG_DFL);
compat_signal(SIGTRAP, SIG_DFL);
#endif
}
/*=========================================
* Register the signal handlers
*-----------------------------------------
*/
int sig_init ()
{
void (*func)(int) = sig_dump;
#ifdef CYGWIN // test if dumper is enabled
char *buf = getenv ("CYGWIN");
if (buf && strstr(buf, "error_start") != NULL)
func = SIG_DFL;
#endif
IMPORT_SYMBOL(server_name, 1);
IMPORT_SYMBOL(getrevision, 6);
IMPORT_SYMBOL(getuptime, 11);
compat_signal(SIGSEGV, func);
compat_signal(SIGFPE, func);
compat_signal(SIGILL, func);
compat_signal(SIGBUS, func);
return 1;
}
static
void sig_proc(int)
{
for (int i = 1; i < 31; ++i)
{
DIAG_PUSH();
DIAG_I(old_style_cast);
compat_signal(i, SIG_IGN);
DIAG_POP();
}
runflag = false;
}
void sig_dump(int sn)
{
FILE *fp;
char file[256];
int no = 0;
crash_flag = 1;
// search for a usable filename
do {
sprintf (file, "log/%s%04d.stackdump", server_name, ++no);
} while((fp = fopen(file,"r")) && (fclose(fp), no < 9999));
// dump the trace into the file
if ((fp = FOPEN_(file, "w", stderr)) != NULL) {
const char *revision;
#ifndef CYGWIN
void* array[20];
char **stack;
size_t size;
#endif
ShowNotice ("Dumping stack to '"CL_WHITE"%s"CL_RESET"'...\n", file);
if ((revision = getrevision()) != NULL)
fprintf(fp, "Version: svn%s \n", revision);
else
fprintf(fp, "Version: %2d.%02d.%02d mod%02d \n", ATHENA_MAJOR_VERSION, ATHENA_MINOR_VERSION, ATHENA_REVISION, ATHENA_MOD_VERSION);
fprintf(fp, "Exception: %s \n", strsignal(sn));
fflush (fp);
#ifdef CYGWIN
cygwin_stackdump ();
#else
fprintf(fp, "Stack trace:\n");
size = backtrace (array, 20);
stack = backtrace_symbols (array, size);
for (no = 0; no < size; no++) {
fprintf(fp, "%s\n", stack[no]);
}
fprintf(fp,"End of stack trace\n");
free(stack);
#endif
ShowNotice("%s Saved.\n", file);
fflush(stdout);
fclose(fp);
}
sig_final(); // Log our uptime
// Pass the signal to the system's default handler
compat_signal(sn, SIG_DFL);
raise(sn);
}