static void
addr2text(char *out, size_t outlen, void *ptr)
{
Dl_info dli = {};
char buf[256];
int r = dladdr(ptr, &dli);
if(r && dli.dli_sname != NULL && dli.dli_saddr != NULL) {
snprintf(out, outlen, "%s+0x%tx (%s)",
dli.dli_sname, ptr - dli.dli_saddr, dli.dli_fname);
return;
}
if(self[0] && !add2lineresolve(self, ptr, buf, sizeof(buf))) {
snprintf(out, outlen, "%s %p", buf, ptr);
return;
}
if(dli.dli_fname != NULL && dli.dli_fbase != NULL) {
snprintf(out, outlen, "%s %p", dli.dli_fname, ptr);
return;
}
snprintf(out, outlen, "%p", ptr);
}
static void
traphandler(int sig, siginfo_t *si, void *UC)
{
ucontext_t *uc = UC;
#if ENABLE_EXECINFO
char buf[200];
static void *frames[MAXFRAMES];
int nframes = backtrace(frames, MAXFRAMES);
Dl_info dli;
#endif
int i;
const char *reason = NULL;
tvhlog_spawn(LOG_ALERT, "CRASH", "Signal: %d in %s ", sig, line1);
switch(sig) {
case SIGSEGV:
switch(si->si_code) {
case SEGV_MAPERR: reason = "Address not mapped"; break;
case SEGV_ACCERR: reason = "Access error"; break;
}
break;
case SIGFPE:
switch(si->si_code) {
case FPE_INTDIV: reason = "Integer division by zero"; break;
}
break;
}
tvhlog_spawn(LOG_ALERT, "CRASH", "Fault address %p (%s)",
si->si_addr, reason ?: "N/A");
tvhlog_spawn(LOG_ALERT, "CRASH", "Loaded libraries: %s ", libs);
snprintf(tmpbuf, sizeof(tmpbuf), "Register dump [%d]: ", NGREG);
for(i = 0; i < NGREG; i++) {
#if __WORDSIZE == 64
sappend(tmpbuf, sizeof(tmpbuf), "%016llx ", uc->uc_mcontext.gregs[i]);
#else
sappend(tmpbuf, sizeof(tmpbuf), "%08x ", uc->uc_mcontext.gregs[i]);
#endif
}
tvhlog_spawn(LOG_ALERT, "CRASH", "%s", tmpbuf);
#if ENABLE_EXECINFO
tvhlog_spawn(LOG_ALERT, "CRASH", "STACKTRACE");
for(i = 0; i < nframes; i++) {
if(dladdr(frames[i], &dli)) {
if(dli.dli_sname != NULL && dli.dli_saddr != NULL) {
tvhlog_spawn(LOG_ALERT, "CRASH", "%s+0x%tx (%s)",
dli.dli_sname,
frames[i] - dli.dli_saddr,
dli.dli_fname);
continue;
}
if(self[0] && !add2lineresolve(self, frames[i], buf, sizeof(buf))) {
tvhlog_spawn(LOG_ALERT, "CRASH", "%s %p", buf, frames[i]);
continue;
}
if(dli.dli_fname != NULL && dli.dli_fbase != NULL) {
tvhlog_spawn(LOG_ALERT, "CRASH", "%s %p",
dli.dli_fname,
frames[i]);
continue;
}
tvhlog_spawn(LOG_ALERT, "CRASH", "%p", frames[i]);
}
}
#endif
}
