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Backtrace doesn't terminate.
- From: Girish Shilamkar <girish at linsyssoft dot com>
- To: gdb at sources dot redhat dot com
- Date: Fri, 17 Mar 2006 20:20:30 +0530
- Subject: Backtrace doesn't terminate.
Hi All,
I am using gdb 6.4 on Xscale processor. I found that the backtrace
doesn't terminate for multi-threaded application, it keeps on repeating
the last frame.
This problem was also seen on native gdb.
(gdb) bt
#0 0x401bf06c in nanosleep ()
from /opt/timesys/toolchains/armv5l-linux/armv5l-linux-
debug/lib/libc.so.6
#1 0x401beeb0 in __sleep (seconds=0)
at ../sysdeps/unix/sysv/linux/sleep.c:137
#2 0x00008574 in thread_func (not_used=0xbee2fba8) at multithread.c:35
#3 0x400dc0f0 in pthread_start_thread_event (arg=0xbcbffbe0) at
manager.c:310
#4 0x400dc0f0 in pthread_start_thread_event (arg=0xbcbffbe0) at
manager.c:310
#5 0x400dc0f0 in pthread_start_thread_event (arg=0xbcbffbe0) at
manager.c:310
#6 0x400dc0f0 in pthread_start_thread_event (arg=0xbcbffbe0) at
manager.c:310
#7 0x400dc0f0 in pthread_start_thread_event (arg=0xbcbffbe0) at
manager.c:310
#8 0x400dc0f0 in pthread_start_thread_event (arg=0xbcbffbe0) at
manager.c:310
On investigating further I found that registers remained unchanged
except sp, for these frames.
(gdb) fr 3
#3 0x400dc0f0 in pthread_start_thread_event (arg=0xbcbffbe0) at
manager.c:310
310 in manager.c
(gdb) info regi
r0 0x0 0
r1 0xbcbff960 -1128269472
r2 0x0 0
r3 0x1 1
r4 0x174 372
r5 0xbcbffbe0 -1128268832
r6 0x0 0
r7 0x400f0d6c 1074728300
r8 0x80 128
r9 0x400eebc0 1074719680
r10 0x400ee000 1074716672
r11 0x0 0
r12 0x0 0
sp 0xbcbffb40 -1128268992
lr 0x400dc0f0 1074643184
pc 0x400dc0f0 1074643184
fps 0x0 0
cpsr 0x60000010 1610612752
(gdb) fr 4
#4 0x400dc0f0 in pthread_start_thread_event (arg=0xbcbffbe0) at
manager.c:310
310 in manager.c
(gdb) info regi
r0 0x0 0
r1 0xbcbff960 -1128269472
r2 0x0 0
r3 0x1 1
r4 0x174 372
r5 0xbcbffbe0 -1128268832
r6 0x0 0
r7 0x400f0d6c 1074728300
r8 0x80 128
r9 0x400eebc0 1074719680
r10 0x400ee000 1074716672
r11 0x0 0
r12 0x0 0
sp 0xbcbffbd8 -1128268840
lr 0x400dc0f0 1074643184
pc 0x400dc0f0 1074643184
fps 0x0 0
cpsr 0x60000010 1610612752
(gdb)
Kindly let me know where things might be going wrong.
Thanks & Regards,
-Girish.