[test] More printing to investigate hanging tests on mac

NOTRY=true
TBR=ulan@chromium.org

Change-Id: I497f5d0359d32e48cb1c54c958bc9897c168f025
Reviewed-on: https://chromium-review.googlesource.com/715900
Commit-Queue: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#48500}

tools/testrunner/local/commands.py

@@ -112,6 +112,17 @@ def RunProcess(verbose, timeout, args, additional_env, **rest):
           print "Attempting to kill process %d - cmd %s" % (process.pid, args)
           sys.stdout.flush()
         process.kill()
+        if utils.GuessOS() == "macos":
+          # TODO(machenbach): Temporary output for investigating hanging test
+          # driver on mac. This will probably not print much, since kill only
+          # sends the signal.
+          print "Return code after signalling the kill: %s" % process.returncode
+          try:
+            print subprocess.check_output(
+              "ps -e | egrep 'd8|cctest|unittests'", shell=True)
+          except Exception:
+            pass
+
     except OSError:
       sys.stderr.write('Error: Process %s already ended.\n' % process.pid)