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runtime: convert freezing to atomic type

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Updates #53821

Change-Id: I77fcdb972b8920e1fb42248ce5bd2c3d2d0bd27e
Reviewed-on: https://go-review.googlesource.com/c/go/+/423885
Reviewed-by: Michael Pratt <mpratt@google.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Cuong Manh Le <cuong.manhle.vn@gmail.com>
This commit is contained in:
Cuong Manh Le 2022-08-17 17:28:58 +07:00
parent 5e20f2e4df
commit 7e7ecf5cbb
1 changed files with 3 additions and 3 deletions
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6
src/runtime/proc.go
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@ -868,13 +868,13 @@ const freezeStopWait = 0x7fffffff
// freezing is set to non-zero if the runtime is trying to freeze the
// world.
var freezing uint32
var freezing atomic.Bool
// Similar to stopTheWorld but best-effort and can be called several times.
// There is no reverse operation, used during crashing.
// This function must not lock any mutexes.
func freezetheworld() {
atomic.Store(&freezing, 1)
freezing.Store(true)
// stopwait and preemption requests can be lost
// due to races with concurrently executing threads,
// so try several times
@ -1240,7 +1240,7 @@ func stopTheWorldWithSema() {
}
}
}
if atomic.Load(&freezing) != 0 {
if freezing.Load() {
// Some other thread is panicking. This can cause the
// sanity checks above to fail if the panic happens in
// the signal handler on a stopped thread. Either way,