mirror of https://github.com/golang/go.git
f2e87158f0
GOTRACEBACK=crash works by bouncing a SIGQUIT around the process sched.mcount times. However, sched.mcount includes the extra Ms allocated by oneNewExtraM for cgo callbacks. Hence, if there are any extra Ms that don't have real OS threads, we'll try to send SIGQUIT more times than there are threads to catch it. Since nothing will catch these extra signals, we'll fall back to blocking for five seconds before aborting the process. Avoid this five second delay by subtracting out the number of extra Ms when sending SIGQUITs. Of course, in a cgo binary, it's still possible for the SIGQUIT to go to a cgo thread and cause some other failure mode. This does not fix that. Change-Id: I4fbf3c52dd721812796c4c1dcb2ab4cb7026d965 Reviewed-on: https://go-review.googlesource.com/38182 Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org> |
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