[release-branch.go1.4] runtime: fix deadlock in runtime.Stack
It shouldn't semacquire() inside an acquirem(), the runtime
thinks that means deadlock. It actually isn't a deadlock, but it
looks like it because acquirem() does m.locks++.
Candidate for inclusion in 1.4.1. runtime.Stack with all=true
is pretty unuseable in GOMAXPROCS>1 environment.
fixes #9321
Change-Id: Iac6b664217d24763b9878c20e49229a1ecffc805
Reviewed-on: https://go-review.googlesource.com/1600
Reviewed-by: Dmitry Vyukov <dvyukov@google.com>
(cherry picked from commit
50bc3d5bbc6710663c082aa72c8ba4f9ee515ab3)
Reviewed-on: https://go-review.googlesource.com/2807
Reviewed-by: Andrew Gerrand <adg@golang.org>