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runtime: convert freezing to atomic type
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>
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@ -868,13 +868,13 @@ const freezeStopWait = 0x7fffffff
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// freezing is set to non-zero if the runtime is trying to freeze the
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// freezing is set to non-zero if the runtime is trying to freeze the
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// world.
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// world.
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var freezing uint32
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var freezing atomic.Bool
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// Similar to stopTheWorld but best-effort and can be called several times.
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// Similar to stopTheWorld but best-effort and can be called several times.
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// There is no reverse operation, used during crashing.
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// There is no reverse operation, used during crashing.
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// This function must not lock any mutexes.
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// This function must not lock any mutexes.
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func freezetheworld() {
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func freezetheworld() {
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atomic.Store(&freezing, 1)
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freezing.Store(true)
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// stopwait and preemption requests can be lost
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// stopwait and preemption requests can be lost
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// due to races with concurrently executing threads,
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// due to races with concurrently executing threads,
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// so try several times
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// so try several times
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@ -1240,7 +1240,7 @@ func stopTheWorldWithSema() {
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}
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}
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}
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}
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}
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}
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if atomic.Load(&freezing) != 0 {
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if freezing.Load() {
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// Some other thread is panicking. This can cause the
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// Some other thread is panicking. This can cause the
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// sanity checks above to fail if the panic happens in
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// sanity checks above to fail if the panic happens in
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// the signal handler on a stopped thread. Either way,
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// the signal handler on a stopped thread. Either way,
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