kern/68992: valgrind stuck in umtx state before exit
Emil Mikulic
g3c7a531 at dmr.ath.cx
Wed Jul 14 01:40:28 PDT 2004
The following reply was made to PR kern/68992; it has been noted by GNATS.
From: Emil Mikulic <g3c7a531 at dmr.ath.cx>
To: freebsd-gnats-submit at FreeBSD.org
Cc:
Subject: Re: kern/68992: valgrind stuck in umtx state before exit
Date: Wed, 14 Jul 2004 18:32:21 +1000
It turns out that valgrind uses the "contested" flag (which was
changed), hard-coding it as a magic number instead of using the (now
non-existant) UMTX_CONTESTED macro.
Please close this PR. I'm sorry about the noise (and also about
doubting the kernel)
Meanwhile, the following patch works for me:
--- valgrind-current-337-orig/coregrind/vg_proxylwp.c Fri Apr 9 22:23:30 2004
+++ valgrind-current-337/coregrind/vg_proxylwp.c Wed Jul 14 18:27:03 2004
@@ -28,9 +28,13 @@
The GNU General Public License is contained in the file COPYING.
*/
-
#include "vg_include.h"
+#ifndef UMTX_CONTESTED
+# include <sys/limits.h>
+# define UMTX_CONTESTED LONG_MIN /* XXX bad */
+#endif
+
/* We need our own copy of VG_(do_syscall)() to handle a special
race-condition. If we've got signals unblocked, and we take a
signal in the gap either just before or after the syscall, we may
@@ -588,7 +592,7 @@
#if __FreeBSD__ == 5
VG_(do_syscall)(__NR__umtx_lock, &px->mutex);
- px->mutex.u_owner |= 1; /* XXX set contested bit for simplicity */
+ px->mutex.u_owner |= UMTX_CONTESTED; /* XXX set contested bit for simplicity */
VG_(do_syscall)(__NR_thr_self, &px->lwp);
#endif
#if __FreeBSD__ == 4
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