tree e5e241b71592c0f592cb31087e3dc78b02c56d06
parent 3e48c0381fd1beb78e993e940c3b46ca9898ce6d
author David Chase <drchase@google.com> 1626907085 -0400
committer David Chase <drchase@google.com> 1626973275 +0000

runtime: move mem profile sampling into m-acquired section

It was not safe to do mcache profiling updates outside the critical
section, but we got lucky because the runtime was not preemptible.
Adding chunked memory clearing (CL 270943) created preemption
opportunities, which led to corruption of runtime data structures.

Fixes #47304.
Fixes #47302.

Change-Id: I461615470d62328a83ccbac537fbdc6dcde81c85
Reviewed-on: https://go-review.googlesource.com/c/go/+/336449
Trust: David Chase <drchase@google.com>
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Austin Clements <austin@google.com>
Reviewed-by: Keith Randall <khr@golang.org>