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| author | Dmitriy Vyukov <dvyukov@google.com> | 2012-12-24 21:06:57 +0400 |
|---|---|---|
| committer | Dmitriy Vyukov <dvyukov@google.com> | 2012-12-24 21:06:57 +0400 |
| commit | 4380fa6d99284c03e471bafcb1be2db83b225af4 (patch) | |
| tree | 184aebd735a685281658a6b8bed68449233164b1 /src/pkg/runtime/lock_futex.c | |
| parent | cfcc3ebfa4358c7c5d94c2a9b32481ab0fb3aeaf (diff) | |
| download | go-4380fa6d99284c03e471bafcb1be2db83b225af4.tar.xz | |
runtime: diagnose double wakeup on Note
Double wakeup is prohibited by the Note interface
and checked in lock_sema.c.
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/6976054
Diffstat (limited to 'src/pkg/runtime/lock_futex.c')
| -rw-r--r-- | src/pkg/runtime/lock_futex.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/pkg/runtime/lock_futex.c b/src/pkg/runtime/lock_futex.c index b4465bff18..9b1f5f6db4 100644 --- a/src/pkg/runtime/lock_futex.c +++ b/src/pkg/runtime/lock_futex.c @@ -111,7 +111,8 @@ runtime·noteclear(Note *n) void runtime·notewakeup(Note *n) { - runtime·xchg(&n->key, 1); + if(runtime·xchg(&n->key, 1)) + runtime·throw("notewakeup - double wakeup"); runtime·futexwakeup(&n->key, 1); } |