runtime: print "created by" for running goroutines in traceback
This allows to at least determine goroutine "identity".
Now it looks like:
goroutine 12 [running]:
goroutine running on other thread; stack unavailable
created by testing.RunTests
src/pkg/testing/testing.go:440 +0x88e
R=golang-dev, r, rsc
CC=golang-dev
https://golang.org/cl/12248043
diff --git a/src/pkg/runtime/runtime.h b/src/pkg/runtime/runtime.h
index 1935a9a..cfb4793 100644
--- a/src/pkg/runtime/runtime.h
+++ b/src/pkg/runtime/runtime.h
@@ -1039,6 +1039,7 @@
void runtime·chansend(ChanType*, Hchan*, byte*, bool*, void*);
void runtime·chanrecv(ChanType*, Hchan*, byte*, bool*, bool*);
bool runtime·showframe(Func*, G*);
+void runtime·printcreatedby(G*);
void runtime·ifaceE2I(InterfaceType*, Eface, Iface*);
