[PATCHv2] Fix test failure with -DNDEBUG.

[Carlos O'Donell <carlos at redhat dot com>]

On 08/30/2018 11:13 AM, Florian Weimer wrote:
> On 08/30/2018 05:08 PM, Carlos O'Donell wrote:
>>         rc = pthread_create (&thr, NULL, fn, NULL);
>> -      assert (rc == 0);
>> +      TEST_VERIFY (rc == 0);
>>           rc = pthread_join (thr, NULL);
>> -      assert (rc == 0);
>> +      TEST_VERIFY (rc == 0);
> 
> Both should actually be TEST_VERIFY_EXIT, I assume, and that would be
> close to xpthread_create and xpthread_join.

I might as well just cleanup the test.

v2
- Use xpthread_create, xpthread_join. The threads need to be started for
  the test to validly use up slotinfo entries.

-- 
Cheers,
Carlos.

>From 25874919ebd865bc6463c02c9408fa39394f4b7e Mon Sep 17 00:00:00 2001
From: Carlos O'Donell <carlos@redhat.com>
Date: Thu, 30 Aug 2018 11:01:33 -0400
Subject: [PATCH] Fix test failure with -DNDEBUG.

The elf/tst-dlopen-aout.c test uses asserts to verify properties of the
test execution.  Instead of using assert it should use xpthread_create
and xpthread_join to catch errors starting the threads and fail the
test.  This shows up in Fedora 28 when building for i686-pc-linux-gnu
and using gcc 8.1.1.

Tested on i686, and fixes a check failure with -DNDEBUG.

Signed-off-by: Carlos O'Donell <carlos@redhat.com>
---
 ChangeLog             |  4 ++++
 elf/tst-dlopen-aout.c | 12 ++++++------
 2 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index cdc9b8c207..00ea098fe1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2018-02-30  Carlos O'Donell  <carlos@redhat.com>
+
+	* elf/tst-dlopen-aout.c: Include support/check.h. Use TEST_VERIFY.
+
 2018-08-28  Joseph Myers  <joseph@codesourcery.com>
 
 	* sysdeps/aarch64/fpu/fenv_private.h: New file.  Based on ....
diff --git a/elf/tst-dlopen-aout.c b/elf/tst-dlopen-aout.c
index 9038e2096a..89119d62fa 100644
--- a/elf/tst-dlopen-aout.c
+++ b/elf/tst-dlopen-aout.c
@@ -27,6 +27,7 @@
 #include <dlfcn.h>
 #include <stdio.h>
 #include <pthread.h>
+#include <support/xthread.h>
 
 __thread int x;
 
@@ -45,7 +46,6 @@ do_test (int argc, char *argv[])
     {
       pthread_t thr;
       void *p;
-      int rc;
 
       p = dlopen (argv[0], RTLD_LAZY);
       if (p != NULL)
@@ -53,11 +53,11 @@ do_test (int argc, char *argv[])
           fprintf (stderr, "dlopen unexpectedly succeeded\n");
           return 1;
         }
-      rc = pthread_create (&thr, NULL, fn, NULL);
-      assert (rc == 0);
-
-      rc = pthread_join (thr, NULL);
-      assert (rc == 0);
+      /* We create threads to force TLS allocation, which triggers
+	 the original bug e.g. running out of surplus slotinfo entries
+	 for TLS.  */
+      thr = xpthread_create (NULL, fn, NULL);
+      xpthread_join (thr);
     }
 
   return 0;
-- 
2.17.1