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Andrew Comminos authored
Sets an atomic field on each sampler when it requests a sample, to be checked when the SIGPROF handler is executed. A counter is not used since signals may be coalesced. Prior to this change, all samplers attached to an isolate received samples when other samplers sent SIGPROF to the VM thread. This change alters the behaviour of different CpuProfiler instances on the same isolate to be in line with the Windows / Fuchsia behaviour. Bug: v8:8835 Change-Id: I0caaa845b596efc9d8b1cd7716c067d9a6359c57 Reviewed-on: https://chromium-review.googlesource.com/c/1468941 Commit-Queue: Peter Marshall <petermarshall@chromium.org> Reviewed-by: Peter Marshall <petermarshall@chromium.org> Reviewed-by: Alexei Filippov <alph@chromium.org> Cr-Commit-Position: refs/heads/master@{#59545}
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