[src/trunk]: src/tests/lib/libc/sys Add a new function in ATF t_ptrace_wait*:...

[kamil <kamil%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/8e5e43f34137
branches:  trunk
changeset: 831132:8e5e43f34137
user:      kamil <kamil%NetBSD.org@localhost>
date:      Tue Mar 13 13:34:40 2018 +0000

description:
Add a new function in ATF t_ptrace_wait*: await_zombie_raw()

Add await_zombie_raw() that is the same as await_zombie(), whith an
addition of additional "useconds_t ms" parameter indicating delays between
new polling for a zombie process.

This new function will be used for testing a race condition that has been
observed occassionally crashing a test case -- returning duplicate entries
for KERN_PROC_PID.

Sponsored by <The NetBSD Foundation>

diffstat:

 tests/lib/libc/sys/t_ptrace_wait.h |  15 ++++++++++++---
 1 files changed, 12 insertions(+), 3 deletions(-)

diffs (39 lines):

diff -r d7952da9e898 -r 8e5e43f34137 tests/lib/libc/sys/t_ptrace_wait.h
--- a/tests/lib/libc/sys/t_ptrace_wait.h        Tue Mar 13 09:04:02 2018 +0000
+++ b/tests/lib/libc/sys/t_ptrace_wait.h        Tue Mar 13 13:34:40 2018 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: t_ptrace_wait.h,v 1.1 2017/04/02 21:44:00 kamil Exp $  */
+/*     $NetBSD: t_ptrace_wait.h,v 1.2 2018/03/13 13:34:40 kamil Exp $  */
 
 /*-
  * Copyright (c) 2016 The NetBSD Foundation, Inc.
@@ -328,7 +328,7 @@
 
 /* This function is currently designed to be run in the main/parent process */
 static void __used
-await_zombie(pid_t process)
+await_zombie_raw(pid_t process, useconds_t ms)
 {
        struct kinfo_proc2 p;
        size_t len = sizeof(p);
@@ -351,10 +351,19 @@
                if (p.p_stat == LSZOMB)
                        break;
 
-               ATF_REQUIRE(usleep(1000) == 0);
+               if (ms > 0) {
+                       ATF_REQUIRE(usleep(ms) == 0);
+               }
        }
 }
 
+static void __used
+await_zombie(pid_t process)
+{
+
+       await_zombie_raw(process, 1000);
+}
+
 /* Happy number sequence -- this function is used to just consume cpu cycles */
 #define        HAPPY_NUMBER    1