| // Copyright 2012 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 solaris |
| |
| #include "runtime.h" |
| #include "defs_GOOS_GOARCH.h" |
| #include "os_GOOS.h" |
| #include "signal_unix.h" |
| |
| extern SigTab runtime·sigtab[]; |
| |
| void |
| runtime·initsig(void) |
| { |
| int32 i; |
| SigTab *t; |
| |
| // First call: basic setup. |
| for(i = 0; i<NSIG; i++) { |
| t = &runtime·sigtab[i]; |
| if((t->flags == 0) || (t->flags & SigDefault)) |
| continue; |
| |
| // For some signals, we respect an inherited SIG_IGN handler |
| // rather than insist on installing our own default handler. |
| // Even these signals can be fetched using the os/signal package. |
| switch(i) { |
| case SIGHUP: |
| case SIGINT: |
| if(runtime·getsig(i) == SIG_IGN) { |
| t->flags = SigNotify | SigIgnored; |
| continue; |
| } |
| } |
| |
| t->flags |= SigHandling; |
| runtime·setsig(i, runtime·sighandler, true); |
| } |
| } |
| |
| void |
| runtime·sigenable(uint32 sig) |
| { |
| SigTab *t; |
| |
| if(sig >= NSIG) |
| return; |
| |
| t = &runtime·sigtab[sig]; |
| if((t->flags & SigNotify) && !(t->flags & SigHandling)) { |
| t->flags |= SigHandling; |
| if(runtime·getsig(sig) == SIG_IGN) |
| t->flags |= SigIgnored; |
| runtime·setsig(sig, runtime·sighandler, true); |
| } |
| } |
| |
| void |
| runtime·sigdisable(uint32 sig) |
| { |
| SigTab *t; |
| |
| if(sig >= NSIG) |
| return; |
| |
| t = &runtime·sigtab[sig]; |
| if((t->flags & SigNotify) && (t->flags & SigHandling)) { |
| t->flags &= ~SigHandling; |
| if(t->flags & SigIgnored) |
| runtime·setsig(sig, SIG_IGN, true); |
| else |
| runtime·setsig(sig, SIG_DFL, true); |
| } |
| } |
| |
| void |
| runtime·resetcpuprofiler(int32 hz) |
| { |
| Itimerval it; |
| |
| runtime·memclr((byte*)&it, sizeof it); |
| if(hz == 0) { |
| runtime·setitimer(ITIMER_PROF, &it, nil); |
| } else { |
| it.it_interval.tv_sec = 0; |
| it.it_interval.tv_usec = 1000000 / hz; |
| it.it_value = it.it_interval; |
| runtime·setitimer(ITIMER_PROF, &it, nil); |
| } |
| m->profilehz = hz; |
| } |
| |
| void |
| os·sigpipe(void) |
| { |
| runtime·setsig(SIGPIPE, SIG_DFL, false); |
| runtime·raise(SIGPIPE); |
| } |
| |
| void |
| runtime·crash(void) |
| { |
| #ifdef GOOS_darwin |
| // OS X core dumps are linear dumps of the mapped memory, |
| // from the first virtual byte to the last, with zeros in the gaps. |
| // Because of the way we arrange the address space on 64-bit systems, |
| // this means the OS X core file will be >128 GB and even on a zippy |
| // workstation can take OS X well over an hour to write (uninterruptible). |
| // Save users from making that mistake. |
| if(sizeof(void*) == 8) |
| return; |
| #endif |
| |
| runtime·unblocksignals(); |
| runtime·setsig(SIGABRT, SIG_DFL, false); |
| runtime·raise(SIGABRT); |
| } |