When this command line flag is provided to the BoGo runner it will:
* Disable some timeouts
* Limit concurrency to 1 worker at a time
* Pass the -wait-for-debugger flag to the shim process
* Print the PID of the shim process to status output
On the shim-side, we need to react to -wait-for-debugger by sending
ourselves a SIGSTOP signal. When a debugger attaches to the shim the
process will be resumed.
This makes it possible to debug both the runner side and the shim side
of a BoGo interaction without resorting to print style debugging.
Since SIGSTOP is not a signal we can use on Windows this functionality
is limited to unix builds.
Updates #72006
Change-Id: Iafa08cf71830cdfde3e6ee4826914236e3cd7e57
Reviewed-on: https://go-review.googlesource.com/c/go/+/650737 Reviewed-by: Roland Shoemaker <roland@golang.org> Reviewed-by: Junyang Shao <shaojunyang@google.com> Reviewed-by: Filippo Valsorda <filippo@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>