| commit | f7b9470992bfae96fe61d45bec40b7fc282f15f0 | [log] [tgz] |
|---|---|---|
| author | Michael Pratt <mpratt@google.com> | Thu Aug 12 17:17:51 2021 -0400 |
| committer | Dmitri Shuralyov <dmitshur@golang.org> | Fri Aug 13 16:34:25 2021 +0000 |
| tree | ca4af77b0e73ccab86b7ac79e16b9537bc1f088a | |
| parent | 4397d66bdd98a243f0e1a501d92bc9484660ec41 [diff] |
[release-branch.go1.17] runtime: drop SIGPROF while in ARM < 7 kernel helpers On Linux ARMv6 and below runtime/internal/atomic.Cas calls into a kernel cas helper at a fixed address. If a SIGPROF arrives while executing the kernel helper, the sigprof lostAtomic logic will miss that we are potentially in the spinlock critical section, which could cause a deadlock when using atomics later in sigprof. For #47505 Fixes #47688 Change-Id: If8ba0d0fc47e45d4e6c68eca98fac4c6ed4e43c1 Reviewed-on: https://go-review.googlesource.com/c/go/+/341889 Trust: Michael Pratt <mpratt@google.com> Run-TryBot: Michael Pratt <mpratt@google.com> Reviewed-by: Michael Knyszek <mknyszek@google.com> Reviewed-by: Cherry Mui <cherryyz@google.com> TryBot-Result: Go Bot <gobot@golang.org> (cherry picked from commit 20a620fd9f7bc35739c1af3602d53808d0430814) Reviewed-on: https://go-review.googlesource.com/c/go/+/341890
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