161 lines
3.2 KiB
C
161 lines
3.2 KiB
C
// Copyright 2012 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 <sys/time.h>
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#include "runtime.h"
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#include "defs.h"
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#include "signal_unix.h"
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extern SigTab runtime_sigtab[];
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void
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runtime_initsig(void)
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{
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int32 i;
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SigTab *t;
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// First call: basic setup.
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for(i = 0; runtime_sigtab[i].sig != -1; i++) {
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t = &runtime_sigtab[i];
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if((t->flags == 0) || (t->flags & SigDefault))
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continue;
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// For some signals, we respect an inherited SIG_IGN handler
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// rather than insist on installing our own default handler.
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// Even these signals can be fetched using the os/signal package.
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switch(t->sig) {
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case SIGHUP:
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case SIGINT:
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if(runtime_getsig(i) == GO_SIG_IGN) {
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t->flags = SigNotify | SigIgnored;
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continue;
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}
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}
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t->flags |= SigHandling;
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runtime_setsig(i, runtime_sighandler, true);
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}
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}
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void
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runtime_sigenable(uint32 sig)
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{
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int32 i;
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SigTab *t;
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t = nil;
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for(i = 0; runtime_sigtab[i].sig != -1; i++) {
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if(runtime_sigtab[i].sig == (int32)sig) {
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t = &runtime_sigtab[i];
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break;
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}
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}
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if(t == nil)
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return;
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if((t->flags & SigNotify) && !(t->flags & SigHandling)) {
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t->flags |= SigHandling;
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if(runtime_getsig(i) == GO_SIG_IGN)
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t->flags |= SigIgnored;
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runtime_setsig(i, runtime_sighandler, true);
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}
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}
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void
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runtime_sigdisable(uint32 sig)
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{
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int32 i;
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SigTab *t;
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t = nil;
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for(i = 0; runtime_sigtab[i].sig != -1; i++) {
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if(runtime_sigtab[i].sig == (int32)sig) {
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t = &runtime_sigtab[i];
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break;
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}
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}
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if(t == nil)
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return;
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if((t->flags & SigNotify) && (t->flags & SigHandling)) {
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t->flags &= ~SigHandling;
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if(t->flags & SigIgnored)
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runtime_setsig(i, GO_SIG_IGN, true);
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else
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runtime_setsig(i, GO_SIG_DFL, true);
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}
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}
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void
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runtime_resetcpuprofiler(int32 hz)
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{
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struct itimerval it;
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runtime_memclr((byte*)&it, sizeof it);
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if(hz == 0) {
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runtime_setitimer(ITIMER_PROF, &it, nil);
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} else {
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it.it_interval.tv_sec = 0;
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it.it_interval.tv_usec = 1000000 / hz;
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it.it_value = it.it_interval;
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runtime_setitimer(ITIMER_PROF, &it, nil);
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}
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runtime_m()->profilehz = hz;
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}
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void
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os_sigpipe(void)
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{
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int32 i;
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for(i = 0; runtime_sigtab[i].sig != -1; i++)
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if(runtime_sigtab[i].sig == SIGPIPE)
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break;
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runtime_setsig(i, GO_SIG_DFL, false);
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runtime_raise(SIGPIPE);
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}
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void
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runtime_unblocksignals(void)
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{
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sigset_t sigset_none;
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sigemptyset(&sigset_none);
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pthread_sigmask(SIG_SETMASK, &sigset_none, nil);
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}
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void
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runtime_crash(void)
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{
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int32 i;
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#ifdef GOOS_darwin
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// OS X core dumps are linear dumps of the mapped memory,
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// from the first virtual byte to the last, with zeros in the gaps.
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// Because of the way we arrange the address space on 64-bit systems,
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// this means the OS X core file will be >128 GB and even on a zippy
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// workstation can take OS X well over an hour to write (uninterruptible).
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// Save users from making that mistake.
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if(sizeof(void*) == 8)
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return;
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#endif
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runtime_unblocksignals();
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for(i = 0; runtime_sigtab[i].sig != -1; i++)
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if(runtime_sigtab[i].sig == SIGABRT)
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break;
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runtime_setsig(i, GO_SIG_DFL, false);
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runtime_raise(SIGABRT);
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}
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void
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runtime_raise(int32 sig)
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{
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raise(sig);
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}
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