Hello,
I built crash 4.0-2.18 on ia64 platform and run it on a vanilla 2.6.14
running kernel.
It starts OK, and has some commands working.
Unfortunately, it seems that the backtrace command does not do anything
(calls unwind_v3(), but does nothing) on a live system.
I just typed:
bt 1
to get the init task backtrace (sleeping state).
crash is very usefull to have such informations on a live system.
Do you have any idea ?
Thanks in advance.
Xavier
[root@pf37a xb]# bin/crash vmlinux-2.6.14
crash 4.0-2.18
Copyright (C) 2002, 2003, 2004, 2005, 2006 Red Hat, Inc.
Copyright (C) 2004, 2005, 2006 IBM Corporation
Copyright (C) 1999-2006 Hewlett-Packard Co
Copyright (C) 2005 Fujitsu Limited
Copyright (C) 2005 NEC Corporation
Copyright (C) 1999, 2002 Silicon Graphics, Inc.
Copyright (C) 1999, 2000, 2001, 2002 Mission Critical Linux, Inc.
This program is free software, covered by the GNU General Public License,
and you are welcome to change it and/or distribute copies of it under
certain conditions. Enter "help copying" to see the conditions.
This program has absolutely no warranty. Enter "help warranty" for details.
GNU gdb 6.1
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain
conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "ia64-unknown-linux-gnu"...
unwind_init_v3
KERNEL: vmlinux-2.6.14
DUMPFILE: /dev/mem
CPUS: 6
DATE: Mon Jan 9 19:14:18 2006
UPTIME: 48 days, 13:04:50
LOAD AVERAGE: 0.26, 0.30, 0.14
TASKS: 125
NODENAME: pf37a
RELEASE: 2.6.14
VERSION: #1 SMP Mon Nov 21 13:27:22 CET 2005
MACHINE: ia64 (1600 Mhz)
MEMORY: 31.9 GB
PID: 7592
COMMAND: "crash"
TASK: e00000012c8a0000 [THREAD_INFO: e00000012c8a0d60]
CPU: 0
STATE: TASK_RUNNING (ACTIVE)
crash> bt
PID: 7592 TASK: e00000012c8a0000 CPU: 0 COMMAND: "crash"
(active)
crash> bt 1
PID: 1 TASK: e0000023ff220000 CPU: 0 COMMAND: "init"
crash>
crash> help -m
flags: 8000352
(NEW_UNWIND|NEW_UNW_V3|UNW_READ|UNW_PTREGS|UNW_R0|D
EVMEMRD)
kvbase: a000000000000000
identity_map_base: e000000000000000
pagesize: 65536
pageshift: 16
pagemask: ffffffffffff0000
pageoffset: ffff
stacksize: 32768
hz: 1024
mhz: 1024
memsize: 34269102080 (0x7fa990000)
bits: 64
nr_irqs: 256
eframe_search: ia64_eframe_search()
back_trace: ia64_back_trace_cmd()
get_processor_speed: ia64_processor_speed()
uvtop: ia64_uvtop()
kvtop: ia64_kvtop()
get_task_pgd: ia64_get_task_pgd()
dump_irq: ia64_dump_irq()
get_stack_frame: ia64_get_stack_frame()
get_stackbase: ia64_get_stackbase()
get_stacktop: ia64_get_stacktop()
translate_pte: ia64_translate_pte()
memory_size: generic_memory_size()
vmalloc_start: ia64_vmalloc_start()
is_task_addr: ia64_is_task_addr()
verify_symbol: ia64_verify_symbol()
dis_filter: ia64_dis_filter()
cmd_mach: ia64_cmd_mach()
get_smp_cpus: ia64_get_smp_cpus()
is_kvaddr: generic_is_kvaddr()
is_uvaddr: generic_is_uvaddr()
verify_paddr: ia64_verify_paddr()
init_kernel_pgd: NULL
value_to_symbol: generic_machdep_value_to_symbol()
line_number_hooks: ia64_line_number_hooks
last_pgd_read: 0
last_pmd_read: 0
last_ptbl_read: 0
pgd: 600000000013a650
pmd: 600000000014a660
ptbl: 600000000015a670
ptrs_per_pgd: 8192
cmdline_arg: (null)
machspec: ia64_machine_specific
cpu_data_address: e000000004b00030
unimpl_va_mask: 0
unimpl_pa_mask: 7ffc000000000000
unw: 60000000000de800
unw_tables_offset: 8
unw_kernel_table_offset: 288
unw_pt_regs_offsets: 224
script_index: 0
script_cache: 600000000a96c9e0 0% (0 of 0)
mem_limit: 0
kernel_region: 5
kernel_start: a000000100000000
phys_start: 4008320 (4000000)
vmalloc_start: a000000200000000
ia64_memmap: 6000000000ab3780
efi_memmap_size: 1728
efi_memdesc_size: 48
unwind_init: unwind_init_v3()
unwind: unwind_v3()
dump_unwind_stats: dump_unwind_stats_v3()
unwind_debug: unwind_debug_v3()
ia64_init_stack_size: 0
crash> ps
PID PPID CPU TASK ST %MEM VSZ RSS COMM
0 0 0 a000000100730000 RU 0.0 0 0 [swapper]
> 0 1 1 e0000001039f0000 RU 0.0 0 0 [swapper]
> 0 1 2 e000000103a20000 RU 0.0 0 0 [swapper]
> 0 1 3 e000000103a40000 RU 0.0 0 0 [swapper]
> 0 1 4 e000000103a60000 RU 0.0 0 0 [swapper]
> 0 1 5 e000000103a80000 RU 0.0 0 0 [swapper]
1 0 1 e0000023ff220000 IN 0.0 5184 3648 init
2 1 0 e0000001039b0000 IN 0.0 0 0 [migration/0]
3 1 0 e0000023ff230000 IN 0.0 0 0 [ksoftirqd/0]
4 1 0 e0000001039d0000 IN 0.0 0 0 [watchdog/0]
.....
begin:vcard
fn:Xavier Bru
n:Bru;Xavier
adr:;;1 rue de Provence, BP 208;38432 Echirolles Cedex;;;France
email;internet:Xavier.Bru@xxxxxxxx
title:BULL/DT/Open Software/linux/ia64
tel;work:+33 (0)4 76 29 77 45
tel;fax:+33 (0)4 76 29 77 70
x-mozilla-html:TRUE
url:http://www.bull.com
version:2.1
end:vcard
