diff options
Diffstat (limited to 'src/pkg/runtime/darwin/amd64/signal.c')
-rw-r--r-- | src/pkg/runtime/darwin/amd64/signal.c | 57 |
1 files changed, 44 insertions, 13 deletions
diff --git a/src/pkg/runtime/darwin/amd64/signal.c b/src/pkg/runtime/darwin/amd64/signal.c index 402ab33ca..3a99d2308 100644 --- a/src/pkg/runtime/darwin/amd64/signal.c +++ b/src/pkg/runtime/darwin/amd64/signal.c @@ -54,6 +54,11 @@ runtime·sighandler(int32 sig, Siginfo *info, void *context, G *gp) mc = uc->uc_mcontext; r = &mc->ss; + if(sig == SIGPROF) { + runtime·sigprof((uint8*)r->rip, (uint8*)r->rsp, nil, gp); + return; + } + if(gp != nil && (runtime·sigtab[sig].flags & SigPanic)) { // Work around Leopard bug that doesn't set FPE_INTDIV. // Look at instruction to see if it is a divide. @@ -136,31 +141,57 @@ runtime·signalstack(byte *p, int32 n) runtime·sigaltstack(&st, nil); } +static void +sigaction(int32 i, void (*fn)(int32, Siginfo*, void*, G*), bool restart) +{ + Sigaction sa; + + runtime·memclr((byte*)&sa, sizeof sa); + sa.sa_flags = SA_SIGINFO|SA_ONSTACK; + if(restart) + sa.sa_flags |= SA_RESTART; + sa.sa_mask = ~0ULL; + sa.sa_tramp = (uintptr)runtime·sigtramp; // runtime·sigtramp's job is to call into real handler + sa.__sigaction_u.__sa_sigaction = (uintptr)fn; + runtime·sigaction(i, &sa, nil); +} + void runtime·initsig(int32 queue) { int32 i; - static Sigaction sa; + void *fn; runtime·siginit(); - sa.sa_flags |= SA_SIGINFO|SA_ONSTACK; - sa.sa_mask = 0xFFFFFFFFU; - sa.sa_tramp = runtime·sigtramp; // runtime·sigtramp's job is to call into real handler for(i = 0; i<NSIG; i++) { if(runtime·sigtab[i].flags) { if((runtime·sigtab[i].flags & SigQueue) != queue) continue; - if(runtime·sigtab[i].flags & (SigCatch | SigQueue)) { - sa.__sigaction_u.__sa_sigaction = runtime·sighandler; - } else { - sa.__sigaction_u.__sa_sigaction = runtime·sigignore; - } - if(runtime·sigtab[i].flags & SigRestart) - sa.sa_flags |= SA_RESTART; + if(runtime·sigtab[i].flags & (SigCatch | SigQueue)) + fn = runtime·sighandler; else - sa.sa_flags &= ~SA_RESTART; - runtime·sigaction(i, &sa, nil); + fn = runtime·sigignore; + sigaction(i, fn, (runtime·sigtab[i].flags & SigRestart) != 0); } } } + +void +runtime·resetcpuprofiler(int32 hz) +{ + Itimerval it; + + runtime·memclr((byte*)&it, sizeof it); + if(hz == 0) { + runtime·setitimer(ITIMER_PROF, &it, nil); + sigaction(SIGPROF, SIG_IGN, true); + } else { + sigaction(SIGPROF, runtime·sighandler, true); + 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; +} |