DragonFly BSD
DragonFly bugs List (threaded) for 2009-12
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Re: coer dump from hammer info

From: Matthew Dillon <dillon@xxxxxxxxxxxxxxxxxxxx>
Date: Sun, 13 Dec 2009 17:03:51 -0800 (PST)

:	Hi,
:	I'm running v2.5.1.376.g8b72b-DEVELOPMENT with hammer version 4
:filesystems (upgraded from version 1 original builds). When I run hammer
:info I get a coredump as it starts on one of the filesystems (the other two
:report OK). The message is:
:assertion: z->z_Magic == ZALLOC_SLAB_MAGIC in _slabfree
:Abort trap: 6 (core dumped)
:	It comes just after reporting on the mountpoints of one filesystem
:and just before it would print "Volume identification" for the last
:	Core dump attached.
:	The filesystem seems to be working fine.

   The core dump doesn't help without the binary as well.  But please
   don't post such big files, the mailing lists aren't designed for it.

   What you can do instead is recompile your hammer binary with
   DEBUG_FLAGS=-g, get another core dump, and gdb it yourself.

   cd /usr/src/sbin/hammer
   make clean
   make DEBUG_FLAGS=-g all install

   (run hammer info such that it core dumps)
   gdb /sbin/hammer hammer.core
   gdb> back				(get backtrace w/ gdb)


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