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authorArjan van de Ven <arjan@infradead.org>2009-01-07 01:40:57 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2009-01-07 02:59:12 +0300
commit5aea50b5c76b07f2b6bda3426dba998156eaf6d0 (patch)
tree20e522f88586e8c0835893e9236dded9fc6d87f2 /fs/Kconfig
parentd6624f996ae539344e8d748cce1117ae7af06fbf (diff)
downloadlinux-5aea50b5c76b07f2b6bda3426dba998156eaf6d0.tar.xz
scripts: script from kerneloops.org to pretty print oops dumps
We're struggling all the time to figure out where the code came from that oopsed.. The script below (a adaption from a script used by kerneloops.org) can help developers quite a bit, at least for non-module cases. It works and looks like this: [/home/arjan/linux]$ dmesg | perl scripts/markup_oops.pl vmlinux { struct agp_memory *memory; memory = agp_allocate_memory(agp_bridge, pg_count, type); c055c10f: 89 c2 mov %eax,%edx if (memory == NULL) c055c111: 74 19 je c055c12c <agp_allocate_memory_wrap+0x30> /* This function must only be called when current_controller != NULL */ static void agp_insert_into_pool(struct agp_memory * temp) { struct agp_memory *prev; prev = agp_fe.current_controller->pool; c055c113: a1 ec dc 8f c0 mov 0xc08fdcec,%eax *c055c118: 8b 40 10 mov 0x10(%eax),%eax <----- faulting instruction if (prev != NULL) { c055c11b: 85 c0 test %eax,%eax c055c11d: 74 05 je c055c124 <agp_allocate_memory_wrap+0x28> prev->prev = temp; c055c11f: 89 50 04 mov %edx,0x4(%eax) temp->next = prev; c055c122: 89 02 mov %eax,(%edx) } agp_fe.current_controller->pool = temp; c055c124: a1 ec dc 8f c0 mov 0xc08fdcec,%eax c055c129: 89 50 10 mov %edx,0x10(%eax) if (memory == NULL) return NULL; agp_insert_into_pool(memory); so in this case, we faulted while dereferencing agp_fe.current_controller pointer, and we get to see exactly which function and line it affects... Personally I find this very useful, and I can see value for having this script in the kernel for more-than-just-me to use. Caveats: * It only works for oopses not-in-modules * It only works nicely for kernels compiled with CONFIG_DEBUG_INFO * It's not very fast. * It only works on x86 Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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