Add CHECK_FOR_INTERRUPTS() to the wait_pid() loop.

nmisch · nmisch · commit 93751570731b · 2015-03-07T00:47:38.000-05:00
Though the one contemporary caller uses it in a limited way, this
function could loop indefinitely if pointed to an arbitrary PID.
diff --git a/src/test/regress/regress.c b/src/test/regress/regress.c
@@ -870,7 +870,10 @@ wait_pid(PG_FUNCTION_ARGS)
 		elog(ERROR, "must be superuser to check PID liveness");
 
 	while (kill(pid, 0) == 0)
+	{
+		CHECK_FOR_INTERRUPTS();
 		pg_usleep(50000);
+	}
 
 	if (errno != ESRCH)
 		elog(ERROR, "could not check PID %d liveness: %m", pid);
