[Crash-utility] [ANNOUNCE] crash version 6.0.6 is available

[Dave Anderson]

Download from: http://people.redhat.com/anderson

Changelog:

 - Extend the supported cross-architecture build capability so that
   it applies to the SIAL extension module.  Without the patch,
   when building the SIAL module in an environment where the 
   overlying crash utility was built with "make target=ARM", 
   "make target=PPC", or "make target=X86", the SIAL extension
   module would continue to be built for the host architecture.
   (rabin at rab.in, anderson at redhat.com)
   
 - Fixes for memory leaks and possible segmentation violations 
   when unloading SIAL extension module scripts.
   (rabin at rab.in)

 - Fix for the new "foreach RU" task state qualifier.  Without the 
   patch, the runnable tasks are not selected.
   (anderson at redhat.com)

 - Fix to disallow multiple task states from being entered using
   the "foreach <task-state>" qualifier.  Without the patch, if
   multiple states were entered, the last one on the command line 
   would be honored.
   (anderson at redhat.com)

 - Fix for the "extend" command to allow the usage of 32-bit PPC 
   extension modules.  Without the patch, the command fails with the
   message: "extend: <object>.so: not an ELF format object file".
   (anderson at redhat.com)

 - If an input line starts with "#" or "//", then the line will be 
   saved as a comment that is visible when re-cycling through the 
   command history list.
   (olivier.daudel at u-paris10.fr, anderson at redhat.com) 

 - Fix for a crash-5.1.9 regression that broke the "bt -g" option.
   Without the patch, the option is ignored completely.
   (ptesarik at suse.cz)

 - Fix for s390x virtual-to-physical translation of virtual addresses 
   that are backed by 1MB pages.  
   (ptesarik at suse.cz)

 - The s390x has a dumpfile method that creates "live dumps", where
   the kernel continues to run while the dumpfile is being created.
   The initial system banner display and the "sys" command will inform 
   the user that the dumpfile is a "[LIVE DUMP]", and the "bt -a" option
   will fail with the message "bt: -a option not supported on a live 
   system or live dump".
   (holzheu at linux.vnet.ibm.com)

 - Newly-created dumpfiles generated by the "snap.c" extension module 
   will now be recognized as "live dumps".  Accordingly, the initial 
   system banner display and the "sys" command will inform the user that
   the dumpfile is a "[LIVE DUMP]", and the "bt -a" option will fail 
   with the message "bt: -a option not supported on a live system or 
   live dump".
   (anderson at redhat.com)

 - If "bt" alone is attempted on an active task in a "live dump", it
   will indicate "(active)", i.e., the same as if it were attempted on
   a live system.
   (holzheu at linux.vnet.ibm.com)

 - If an extension module does not define the appropriate architecture,
   i.e., "-DX86", "-DX86_64", etc., then the inclusion of "defs.h" will
   generate a compiler failure indicating "error: 'NR_CPUS' undeclared 
   here (not in a function)".  In that case, the architecture will now
   default to that of the host machine.
   (anderson at redhat.com)

 - Prevent a highly-unlikely incorrect calculation of the maximum 
   cpudata array length of a kmem_cache during initialization of 
   of CONFIG_SLAB kernels.
   (anderson at redhat.com)

 - Prevent an infinite loop during the initialization of the kmem_cache
   subsystem in CONFIG_SLAB kernels if the cache list or the vmcore is 
   corrupt.  If the kmem_cache list links back into itself, messages
   showing the first "duplicate" entry in the list and "crash: unable 
   to initialize kmem slab cache subsystem" will be displayed.
   (anderson at redhat.com)

 - Update to the "mod" command to additionally search for module object
   files in the directory containing the kernel namelist (vmlinux) file.
   This will allow an alternate module-debuginfo directory tree to be 
   set up like so:

     # cd <directory>
     # rpm2cpio kernel-debuginfo-<release>.rpm | cpio -idv

   Having done that, and by referencing the vmlinux file in that
   directory tree directly or by symbolic link, the "mod" command
   will search for module object files starting from the directory
   containing the vmlinux file if they are not found in the standard 
   /lib/modules/<release> directory.
   (shane.seymour at hp.com, anderson at redhat.com)

 - Update to the s390x "bt" command if a task was running in userspace.
   Without the patch, the back trace display ended at the kernel entry
   function frame; with the patch, the user space PSW register is 
   displayed with a "(user space)" tag, followed by the general purpose 
   register set.
   (holzheu at linux.vnet.ibm.com)
  
 - In the unlikely event that the access of ARM or x86_64 kernel unwind
   table data fails during crash invocation, print a warning message and
   allow the crash session to continue.  Without the patch, the crash 
   session would fail immediately.
   (Jan.Karlsson at sonymobile.com, anderson at redhat.com)