2009-03-24 14:17:10 -06:00
|
|
|
// Copyright 2009 The Go Authors. All rights reserved.
|
|
|
|
// Use of this source code is governed by a BSD-style
|
|
|
|
// license that can be found in the LICENSE file.
|
|
|
|
|
|
|
|
#include "runtime.h"
|
|
|
|
#include "defs.h"
|
2009-03-24 14:51:48 -06:00
|
|
|
#include "os.h"
|
2009-03-24 14:17:10 -06:00
|
|
|
#include "signals.h"
|
|
|
|
|
|
|
|
void
|
2009-03-24 14:51:48 -06:00
|
|
|
dumpregs(Regs *r)
|
2009-03-24 14:17:10 -06:00
|
|
|
{
|
2009-03-31 16:45:12 -06:00
|
|
|
printf("eax %x\n", r->eax);
|
|
|
|
printf("ebx %x\n", r->ebx);
|
|
|
|
printf("ecx %x\n", r->ecx);
|
|
|
|
printf("edx %x\n", r->edx);
|
|
|
|
printf("edi %x\n", r->edi);
|
|
|
|
printf("esi %x\n", r->esi);
|
|
|
|
printf("ebp %x\n", r->ebp);
|
|
|
|
printf("esp %x\n", r->esp);
|
|
|
|
printf("eip %x\n", r->eip);
|
|
|
|
printf("eflags %x\n", r->eflags);
|
|
|
|
printf("cs %x\n", r->cs);
|
|
|
|
printf("fs %x\n", r->fs);
|
|
|
|
printf("gs %x\n", r->gs);
|
2009-03-24 14:17:10 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
void
|
2009-03-24 14:51:48 -06:00
|
|
|
sighandler(int32 sig, Siginfo *info, void *context)
|
2009-03-24 14:17:10 -06:00
|
|
|
{
|
2009-03-24 14:51:48 -06:00
|
|
|
Ucontext *uc;
|
|
|
|
Mcontext *mc;
|
|
|
|
Regs *r;
|
|
|
|
|
2009-03-24 14:17:10 -06:00
|
|
|
if(panicking) // traceback already printed
|
2009-05-08 16:21:41 -06:00
|
|
|
exit(2);
|
2009-03-24 14:17:10 -06:00
|
|
|
panicking = 1;
|
|
|
|
|
|
|
|
if(sig < 0 || sig >= NSIG){
|
2009-03-24 14:51:48 -06:00
|
|
|
printf("Signal %d\n", sig);
|
2009-03-24 14:17:10 -06:00
|
|
|
}else{
|
2009-03-24 14:51:48 -06:00
|
|
|
printf("%s\n", sigtab[sig].name);
|
2009-03-24 14:17:10 -06:00
|
|
|
}
|
|
|
|
|
2009-03-24 14:51:48 -06:00
|
|
|
uc = context;
|
|
|
|
mc = uc->uc_mcontext;
|
|
|
|
r = &mc->ss;
|
|
|
|
|
|
|
|
printf("Faulting address: %p\n", info->si_addr);
|
2009-03-31 16:45:12 -06:00
|
|
|
printf("pc: %x\n", r->eip);
|
2009-03-24 14:51:48 -06:00
|
|
|
printf("\n");
|
2009-03-24 14:17:10 -06:00
|
|
|
|
|
|
|
if(gotraceback()){
|
2009-03-31 16:45:12 -06:00
|
|
|
traceback((void*)r->eip, (void*)r->esp, m->curg);
|
|
|
|
tracebackothers(m->curg);
|
2009-03-24 14:51:48 -06:00
|
|
|
dumpregs(r);
|
2009-03-24 14:17:10 -06:00
|
|
|
}
|
|
|
|
|
2009-05-08 16:21:41 -06:00
|
|
|
breakpoint();
|
|
|
|
exit(2);
|
2009-03-24 14:17:10 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
void
|
2009-03-24 14:51:48 -06:00
|
|
|
sigignore(int32, Siginfo*, void*)
|
2009-03-24 14:17:10 -06:00
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
signalstack(byte *p, int32 n)
|
|
|
|
{
|
2009-03-24 14:51:48 -06:00
|
|
|
StackT st;
|
2009-03-24 14:17:10 -06:00
|
|
|
|
2009-03-24 14:51:48 -06:00
|
|
|
st.ss_sp = p;
|
|
|
|
st.ss_size = n;
|
|
|
|
st.ss_flags = 0;
|
2009-03-24 14:17:10 -06:00
|
|
|
sigaltstack(&st, nil);
|
|
|
|
}
|
|
|
|
|
|
|
|
void
|
|
|
|
initsig(void)
|
|
|
|
{
|
|
|
|
int32 i;
|
2009-03-24 14:51:48 -06:00
|
|
|
static Sigaction sa;
|
2009-03-24 14:17:10 -06:00
|
|
|
|
|
|
|
sa.sa_flags |= SA_SIGINFO|SA_ONSTACK;
|
|
|
|
sa.sa_mask = 0; // 0xFFFFFFFFU;
|
2009-03-24 14:51:48 -06:00
|
|
|
sa.sa_tramp = sigtramp; // sigtramp's job is to call into real handler
|
2009-03-24 14:17:10 -06:00
|
|
|
for(i = 0; i<NSIG; i++) {
|
|
|
|
if(sigtab[i].flags) {
|
|
|
|
if(sigtab[i].flags & SigCatch) {
|
2009-03-24 14:51:48 -06:00
|
|
|
sa.__sigaction_u.__sa_sigaction = sighandler;
|
2009-03-24 14:17:10 -06:00
|
|
|
} else {
|
2009-03-24 14:51:48 -06:00
|
|
|
sa.__sigaction_u.__sa_sigaction = sigignore;
|
2009-03-24 14:17:10 -06:00
|
|
|
}
|
|
|
|
if(sigtab[i].flags & SigRestart)
|
|
|
|
sa.sa_flags |= SA_RESTART;
|
|
|
|
else
|
|
|
|
sa.sa_flags &= ~SA_RESTART;
|
|
|
|
sigaction(i, &sa, nil);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|