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proc: unlock OS thread on exit from handlePtraceFuncs (#2972)

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On FreeBSD and OpenBSD, the use of runtime.LockOSThread is resulting in segfaults
within the Go runtime (see https://github.com/golang/go/issues/52394) - while it
should not be necessary, calling runtime.UnlockOSThread upon exit from
handlePtraceFuncs avoids this issue and allows the tests to run correctly.
This commit is contained in:
Joel Sing 2022-04-27 07:33:16 +10:00 committed by GitHub
parent 7ab33ac92f
commit 5b16ddb7e2
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1 changed files with 7 additions and 0 deletions
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7
pkg/proc/native/proc.go
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@ -271,6 +271,13 @@ func (dbp *nativeProcess) handlePtraceFuncs() {
// all commands after PTRACE_ATTACH to come from the same thread.
runtime.LockOSThread()
// Leaving the OS thread locked currently leads to segfaults in the
// Go runtime while running on FreeBSD and OpenBSD:
// https://github.com/golang/go/issues/52394
if runtime.GOOS == "freebsd" || runtime.GOOS == "openbsd" {
defer runtime.UnlockOSThread()
}
for fn := range dbp.ptraceChan {
fn()
dbp.ptraceDoneChan <- nil