Hi,
The attached patch fixes a problem with a dangling pointer in lt_dlexit
withing libltdl. The problem is that lt_dlclose is recursively called
(via unload_deplibs) in order to close dependent libraries. One of these
might be (and was for me!) the one pointed to by 'cur'.
The patch makes sure that the handle pointed to by 'cur' still exists in
the linked list pointed to by 'handles' and, if it doesn't, resets it.
This patch is against the latest CVS sources of the libtool project as
of today.
Dave
2007-01-17 Dave Brolley <[EMAIL PROTECTED]>
* libltdl/ltdl.c (lt_dlexit): After each call to lt_dlclose, make sure
that the handle pointed to by 'cur' still exists.
Index: libltdl/ltdl.c
===================================================================
RCS file: /sources/libtool/libtool/libltdl/ltdl.c,v
retrieving revision 1.245
diff -c -p -u -5 -r1.245 ltdl.c
--- libltdl/ltdl.c 13 Oct 2006 14:11:18 -0000 1.245
+++ libltdl/ltdl.c 18 Jan 2007 18:31:21 -0000
@@ -1,7 +1,7 @@
/* ltdl.c -- system independent dlopen wrapper
- Copyright (C) 1998, 1999, 2000, 2004, 2005, 2006 Free Software Foundation,
Inc.
+ Copyright (C) 1998, 1999, 2000, 2004, 2005, 2006, 2007 Free Software
Foundation, Inc.
Originally by Thomas Tanner <[EMAIL PROTECTED]>
NOTE: The canonical source of this file is maintained with the
GNU Libtool package. Report bugs to [EMAIL PROTECTED]
@@ -283,10 +283,19 @@ lt_dlexit (void)
{
++errors;
}
}
}
+ /* Make sure that the handle pointed to by 'cur' still exists.
+ lt_dlclose recursively closes dependent libraries which removes
+ them from the linked list. One of these might be the one
+ pointed to by 'cur'. */
+ for (tmp = handles; tmp; tmp = tmp->next)
+ if (tmp == cur)
+ break;
+ if (! tmp)
+ cur = handles;
}
/* done if only resident modules are left */
if (!saw_nonresident)
break;
}
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