runtime: preparation for non-Go threads running Go code
* Handle p==nil in signalstack by setting SS_DISABLE flag.
* Make minit only allocate a signal g if there's not one already.
R=golang-dev, r
CC=golang-dev
https://golang.org/cl/7323072
diff --git a/src/pkg/runtime/thread_darwin.c b/src/pkg/runtime/thread_darwin.c
index df1adf6..83c6380 100644
--- a/src/pkg/runtime/thread_darwin.c
+++ b/src/pkg/runtime/thread_darwin.c
@@ -113,7 +113,8 @@
runtime·minit(void)
{
// Initialize signal handling.
- m->gsignal = runtime·malg(32*1024); // OS X wants >=8K, Linux >=2K
+ if(m->gsignal == nil)
+ m->gsignal = runtime·malg(32*1024); // OS X wants >=8K, Linux >=2K
runtime·signalstack((byte*)m->gsignal->stackguard - StackGuard, 32*1024);
runtime·sigprocmask(SIG_SETMASK, &sigset_none, nil);
@@ -438,10 +439,11 @@
runtime·panicstring(runtime·sigtab[g->sig].name);
}
-// TODO(rsc): place holder to fix build.
+#pragma textflag 7
void
runtime·osyield(void)
{
+ runtime·usleep(1);
}
uintptr
