From: Mark Wielaard <mjw@redhat.com>
Date: Sun, 27 Jun 2010 12:22:55 +0000 (+0200)
Subject: Don't panic on utrace_barrier failures because process already ended.
X-Git-Tag: release-1.3~156
X-Git-Url: https://sourceware.org/git/?a=commitdiff_plain;h=514f3b061acde35e1fa5bcea5664d113b8688863;p=systemtap.git

Don't panic on utrace_barrier failures because process already ended.

* runtime/task_finder.c (stap_utrace_detach): When utrace_barrier returns
  -ESRCH or -EALREADY treat it as success.
---

diff --git a/runtime/task_finder.c b/runtime/task_finder.c
index aa74ad2f9..96763f5f2 100644
--- a/runtime/task_finder.c
+++ b/runtime/task_finder.c
@@ -321,7 +321,8 @@ stap_utrace_detach(struct task_struct *tsk,
 			do {
 				rc = utrace_barrier(tsk, engine);
 			} while (rc == -ERESTARTSYS);
-			if (rc == 0) {
+			if (rc == 0 || rc == -ESRCH || rc == -EALREADY) {
+				rc = 0;
 				debug_task_finder_detach();
 			} else {
 				rc = -rc;