mirror of
https://github.com/golang/go
synced 2024-10-04 18:31:22 -06:00
8a3c587dc1
- do not lose profiling signals when we have no mcache (possible for syscalls/cgo) - do not lose any profiling signals on windows - fix profiling of cgo programs on windows (they had no m->thread setup) - properly setup tls in cgo programs on windows - check _beginthread return value Fixes #6417. Fixes #6986. R=alex.brainman, rsc CC=golang-codereviews https://golang.org/cl/44820047
136 lines
4.0 KiB
C
136 lines
4.0 KiB
C
// Copyright 2013 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build darwin dragonfly freebsd linux netbsd openbsd solaris
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#include "runtime.h"
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#include "defs_GOOS_GOARCH.h"
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#include "os_GOOS.h"
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#include "signal_GOOS_GOARCH.h"
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#include "signals_GOOS.h"
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void
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runtime·dumpregs(Siginfo *info, void *ctxt)
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{
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USED(info);
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USED(ctxt);
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runtime·printf("rax %X\n", SIG_RAX(info, ctxt));
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runtime·printf("rbx %X\n", SIG_RBX(info, ctxt));
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runtime·printf("rcx %X\n", SIG_RCX(info, ctxt));
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runtime·printf("rdx %X\n", SIG_RDX(info, ctxt));
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runtime·printf("rdi %X\n", SIG_RDI(info, ctxt));
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runtime·printf("rsi %X\n", SIG_RSI(info, ctxt));
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runtime·printf("rbp %X\n", SIG_RBP(info, ctxt));
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runtime·printf("rsp %X\n", SIG_RSP(info, ctxt));
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runtime·printf("r8 %X\n", SIG_R8(info, ctxt) );
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runtime·printf("r9 %X\n", SIG_R9(info, ctxt) );
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runtime·printf("r10 %X\n", SIG_R10(info, ctxt));
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runtime·printf("r11 %X\n", SIG_R11(info, ctxt));
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runtime·printf("r12 %X\n", SIG_R12(info, ctxt));
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runtime·printf("r13 %X\n", SIG_R13(info, ctxt));
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runtime·printf("r14 %X\n", SIG_R14(info, ctxt));
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runtime·printf("r15 %X\n", SIG_R15(info, ctxt));
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runtime·printf("rip %X\n", SIG_RIP(info, ctxt));
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runtime·printf("rflags %X\n", SIG_RFLAGS(info, ctxt));
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runtime·printf("cs %X\n", SIG_CS(info, ctxt));
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runtime·printf("fs %X\n", SIG_FS(info, ctxt));
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runtime·printf("gs %X\n", SIG_GS(info, ctxt));
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}
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void
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runtime·sighandler(int32 sig, Siginfo *info, void *ctxt, G *gp)
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{
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uintptr *sp;
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SigTab *t;
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bool crash;
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if(sig == SIGPROF) {
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runtime·sigprof((byte*)SIG_RIP(info, ctxt), (byte*)SIG_RSP(info, ctxt), nil, gp, m);
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return;
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}
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t = &runtime·sigtab[sig];
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if(SIG_CODE0(info, ctxt) != SI_USER && (t->flags & SigPanic)) {
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if(gp == nil || gp == m->g0)
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goto Throw;
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// Make it look like a call to the signal func.
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// Have to pass arguments out of band since
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// augmenting the stack frame would break
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// the unwinding code.
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gp->sig = sig;
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gp->sigcode0 = SIG_CODE0(info, ctxt);
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gp->sigcode1 = SIG_CODE1(info, ctxt);
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gp->sigpc = SIG_RIP(info, ctxt);
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#ifdef GOOS_darwin
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// Work around Leopard bug that doesn't set FPE_INTDIV.
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// Look at instruction to see if it is a divide.
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// Not necessary in Snow Leopard (si_code will be != 0).
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if(sig == SIGFPE && gp->sigcode0 == 0) {
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byte *pc;
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pc = (byte*)gp->sigpc;
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if((pc[0]&0xF0) == 0x40) // 64-bit REX prefix
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pc++;
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else if(pc[0] == 0x66) // 16-bit instruction prefix
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pc++;
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if(pc[0] == 0xF6 || pc[0] == 0xF7)
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gp->sigcode0 = FPE_INTDIV;
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}
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#endif
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// Only push runtime·sigpanic if rip != 0.
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// If rip == 0, probably panicked because of a
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// call to a nil func. Not pushing that onto sp will
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// make the trace look like a call to runtime·sigpanic instead.
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// (Otherwise the trace will end at runtime·sigpanic and we
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// won't get to see who faulted.)
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if(SIG_RIP(info, ctxt) != 0) {
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sp = (uintptr*)SIG_RSP(info, ctxt);
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*--sp = SIG_RIP(info, ctxt);
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SIG_RSP(info, ctxt) = (uintptr)sp;
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}
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SIG_RIP(info, ctxt) = (uintptr)runtime·sigpanic;
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return;
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}
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if(SIG_CODE0(info, ctxt) == SI_USER || (t->flags & SigNotify))
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if(runtime·sigsend(sig))
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return;
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if(t->flags & SigKill)
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runtime·exit(2);
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if(!(t->flags & SigThrow))
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return;
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Throw:
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m->throwing = 1;
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m->caughtsig = gp;
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runtime·startpanic();
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if(sig < 0 || sig >= NSIG)
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runtime·printf("Signal %d\n", sig);
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else
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runtime·printf("%s\n", runtime·sigtab[sig].name);
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runtime·printf("PC=%X\n", SIG_RIP(info, ctxt));
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if(m->lockedg != nil && m->ncgo > 0 && gp == m->g0) {
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runtime·printf("signal arrived during cgo execution\n");
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gp = m->lockedg;
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}
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runtime·printf("\n");
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if(runtime·gotraceback(&crash)){
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runtime·traceback(SIG_RIP(info, ctxt), SIG_RSP(info, ctxt), 0, gp);
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runtime·tracebackothers(gp);
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runtime·printf("\n");
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runtime·dumpregs(info, ctxt);
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}
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if(crash)
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runtime·crash();
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runtime·exit(2);
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}
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