| // 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. |
| |
| // +build darwin dragonfly freebsd linux netbsd openbsd |
| |
| #include "runtime.h" |
| #include "defs_GOOS_GOARCH.h" |
| #include "os_GOOS.h" |
| #include "signal_GOOS_GOARCH.h" |
| #include "signals_GOOS.h" |
| |
| void |
| runtime·dumpregs(Siginfo *info, void *ctxt) |
| { |
| USED(info); |
| USED(ctxt); |
| |
| runtime·printf("trap %x\n", SIG_TRAP(info, ctxt)); |
| runtime·printf("error %x\n", SIG_ERROR(info, ctxt)); |
| runtime·printf("oldmask %x\n", SIG_OLDMASK(info, ctxt)); |
| runtime·printf("r0 %x\n", SIG_R0(info, ctxt)); |
| runtime·printf("r1 %x\n", SIG_R1(info, ctxt)); |
| runtime·printf("r2 %x\n", SIG_R2(info, ctxt)); |
| runtime·printf("r3 %x\n", SIG_R3(info, ctxt)); |
| runtime·printf("r4 %x\n", SIG_R4(info, ctxt)); |
| runtime·printf("r5 %x\n", SIG_R5(info, ctxt)); |
| runtime·printf("r6 %x\n", SIG_R6(info, ctxt)); |
| runtime·printf("r7 %x\n", SIG_R7(info, ctxt)); |
| runtime·printf("r8 %x\n", SIG_R8(info, ctxt)); |
| runtime·printf("r9 %x\n", SIG_R9(info, ctxt)); |
| runtime·printf("r10 %x\n", SIG_R10(info, ctxt)); |
| runtime·printf("fp %x\n", SIG_FP(info, ctxt)); |
| runtime·printf("ip %x\n", SIG_IP(info, ctxt)); |
| runtime·printf("sp %x\n", SIG_SP(info, ctxt)); |
| runtime·printf("lr %x\n", SIG_LR(info, ctxt)); |
| runtime·printf("pc %x\n", SIG_PC(info, ctxt)); |
| runtime·printf("cpsr %x\n", SIG_CPSR(info, ctxt)); |
| runtime·printf("fault %x\n", SIG_FAULT(info, ctxt)); |
| } |
| |
| void |
| runtime·sighandler(int32 sig, Siginfo *info, void *ctxt, G *gp) |
| { |
| SigTab *t; |
| bool crash; |
| |
| if(sig == SIGPROF) { |
| runtime·sigprof((uint8*)SIG_PC(info, ctxt), (uint8*)SIG_SP(info, ctxt), (uint8*)SIG_LR(info, ctxt), gp, m); |
| return; |
| } |
| |
| t = &runtime·sigtab[sig]; |
| if(SIG_CODE0(info, ctxt) != SI_USER && (t->flags & SigPanic)) { |
| // Make it look like a call to the signal func. |
| // Have to pass arguments out of band since |
| // augmenting the stack frame would break |
| // the unwinding code. |
| gp->sig = sig; |
| gp->sigcode0 = SIG_CODE0(info, ctxt); |
| gp->sigcode1 = SIG_FAULT(info, ctxt); |
| gp->sigpc = SIG_PC(info, ctxt); |
| |
| // We arrange lr, and pc to pretend the panicking |
| // function calls sigpanic directly. |
| // Always save LR to stack so that panics in leaf |
| // functions are correctly handled. This smashes |
| // the stack frame but we're not going back there |
| // anyway. |
| SIG_SP(info, ctxt) -= 4; |
| *(uint32*)SIG_SP(info, ctxt) = SIG_LR(info, ctxt); |
| // Don't bother saving PC if it's zero, which is |
| // probably a call to a nil func: the old link register |
| // is more useful in the stack trace. |
| if(gp->sigpc != 0) |
| SIG_LR(info, ctxt) = gp->sigpc; |
| // In case we are panicking from external C code |
| SIG_R10(info, ctxt) = (uintptr)gp; |
| SIG_R9(info, ctxt) = (uintptr)m; |
| SIG_PC(info, ctxt) = (uintptr)runtime·sigpanic; |
| return; |
| } |
| |
| if(SIG_CODE0(info, ctxt) == SI_USER || (t->flags & SigNotify)) |
| if(runtime·sigsend(sig)) |
| return; |
| if(t->flags & SigKill) |
| runtime·exit(2); |
| if(!(t->flags & SigThrow)) |
| return; |
| |
| m->throwing = 1; |
| m->caughtsig = gp; |
| if(runtime·panicking) // traceback already printed |
| runtime·exit(2); |
| runtime·panicking = 1; |
| |
| if(sig < 0 || sig >= NSIG) |
| runtime·printf("Signal %d\n", sig); |
| else |
| runtime·printf("%s\n", runtime·sigtab[sig].name); |
| |
| runtime·printf("PC=%x\n", SIG_PC(info, ctxt)); |
| if(m->lockedg != nil && m->ncgo > 0 && gp == m->g0) { |
| runtime·printf("signal arrived during cgo execution\n"); |
| gp = m->lockedg; |
| } |
| runtime·printf("\n"); |
| |
| if(runtime·gotraceback(&crash)){ |
| runtime·goroutineheader(gp); |
| runtime·traceback(SIG_PC(info, ctxt), SIG_SP(info, ctxt), SIG_LR(info, ctxt), gp); |
| runtime·tracebackothers(gp); |
| runtime·printf("\n"); |
| runtime·dumpregs(info, ctxt); |
| } |
| |
| if(crash) |
| runtime·crash(); |
| |
| runtime·exit(2); |
| } |