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https://github.com/golang/go
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ac00524beb
Go runtime support for dragonfly/amd64, largely based of the existing FreeBSD runtime (with some clues from the varialus/godfly work). R=bradfitz CC=golang-dev https://golang.org/cl/13088044
119 lines
2.5 KiB
C
119 lines
2.5 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 openbsd netbsd
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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_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; i<NSIG; 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(i) {
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case SIGHUP:
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case SIGINT:
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if(runtime·getsig(i) == 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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SigTab *t;
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if(sig >= NSIG)
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return;
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t = &runtime·sigtab[sig];
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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(sig) == SIG_IGN)
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t->flags |= SigIgnored;
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runtime·setsig(sig, 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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SigTab *t;
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if(sig >= NSIG)
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return;
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t = &runtime·sigtab[sig];
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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(sig, SIG_IGN, true);
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else
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runtime·setsig(sig, 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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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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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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runtime·setsig(SIGPIPE, SIG_DFL, false);
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runtime·raise(SIGPIPE);
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}
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void
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runtime·crash(void)
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{
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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·setsig(SIGABRT, SIG_DFL, false);
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runtime·raise(SIGABRT);
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}
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