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| author | Ulrich Drepper <drepper@redhat.com> | 2008-10-06 16:47:10 +0000 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2008-10-06 16:47:10 +0000 |
| commit | af62b44029c208376086940976cc386c9921f086 (patch) | |
| tree | 60dc5c4695a62b78a6c80d81238859d63a2f327b | |
| parent | 2fdde3b920702b10edcd1771f5564ca58f2aa900 (diff) | |
| download | glibc-af62b44029c208376086940976cc386c9921f086.tar.gz glibc-af62b44029c208376086940976cc386c9921f086.tar.xz glibc-af62b44029c208376086940976cc386c9921f086.zip | |
* sysdeps/unix/sysv/linux/fork.c (__libc_fork): Add memory barrier
to force runp->refcntr to be read from memory.
| -rw-r--r-- | ChangeLog | 5 | ||||
| -rw-r--r-- | nptl/sysdeps/unix/sysv/linux/fork.c | 5 |
2 files changed, 9 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog index 9dd19f1575..8a37b4a0fa 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,8 @@ +2008-09-11 Martin Schwidefsky <schwidefsky@de.ibm.com> + + * sysdeps/unix/sysv/linux/fork.c (__libc_fork): Add memory barrier + to force runp->refcntr to be read from memory. + 2008-09-18 Andreas Schwab <schwab@suse.de> [BZ #6942] diff --git a/nptl/sysdeps/unix/sysv/linux/fork.c b/nptl/sysdeps/unix/sysv/linux/fork.c index 1683de80fd..524d72c587 100644 --- a/nptl/sysdeps/unix/sysv/linux/fork.c +++ b/nptl/sysdeps/unix/sysv/linux/fork.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2002, 2003, 2007 Free Software Foundation, Inc. +/* Copyright (C) 2002, 2003, 2007, 2008 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2002. @@ -64,6 +64,9 @@ __libc_fork (void) struct fork_handler *runp; while ((runp = __fork_handlers) != NULL) { + /* Make sure we read from the current RUNP pointer. */ + atomic_full_barrier (); + unsigned int oldval = runp->refcntr; if (oldval == 0) |