> Core was generated by `./minifail'.
> Program terminated with signal 11, Segmentation fault.
> #0 0x00000000 in ?? ()
I wasn't able to duplicate the above running minifail under gdb.
However, I did eventually get it to hang.
(gdb) info thread
2 Thread 0x42169480 (LWP 3246) 0x40240760 in start_thread (arg=0x42169480)
at pthread_create.c:293
* 1 Thread 0x400040c0 (LWP 3245) 0x40240c2c in pthread_join (
threadid=1108776064, thread_return=0x0) at pthread_join.c:89
(gdb) bt
#0 0x40240c2c in pthread_join (threadid=1108776064, thread_return=0x0)
at pthread_join.c:89
#1 0x00011118 in pure_test () at minifail.cpp:70
#2 0x00011350 in main (argc=1, argv=0xbffd3020) at minifail.cpp:80
(gdb) disass 0x40240c1c 0x40240c3c
Dump of assembler code from 0x40240c1c to 0x40240c3c:
0x40240c1c <pthread_join+268>: copy r3,r26
0x40240c20 <pthread_join+272>: copy r19,r4
0x40240c24 <pthread_join+276>: be,l 100(sr2,r0),sr0,r31
0x40240c28 <pthread_join+280>: ldi d2,r20
0x40240c2c <pthread_join+284>: copy r4,r19
0x40240c30 <pthread_join+288>: ldw 68(r5),r24
0x40240c34 <pthread_join+292>: cmpib,<> 0,r24,0x40240c18 <pthread_join+264>
0x40240c38 <pthread_join+296>: ldi 0,r23
End of assembler dump.
So, thread 1 is in a syscall.
(gdb) thread 2
[Switching to thread 2 (Thread 0x42169480 (LWP 3246))]#0 0x40240760 in start_thread (arg=0x42169480) at pthread_create.c:293
293 pthread_create.c: No such file or directory.
in pthread_create.c
(gdb) bt
#0 0x40240760 in start_thread (arg=0x42169480) at pthread_create.c:293
#1 0x412082bc in clone () from /lib/libc.so.6
#2 0x00000000 in ?? ()
(gdb) disass 0x40240760 0x402407a0
Dump of assembler code from 0x40240754 to 0x402407a8:
0x40240754 <start_thread+1108>: ldw 214(ret0),rp
0x40240758 <start_thread+1112>: copy r3,r26
0x40240760 <start_thread+1120>: copy r4,r24
0x40240764 <start_thread+1124>: be,l b0(sr2,r0),sr0,r31
0x40240768 <start_thread+1128>: ldi 0,r20
0x4024076c <start_thread+1132>: ldi -b,r24
0x40240770 <start_thread+1136>: cmpb,=,n r24,r21,0x40240758 <start_thread+1112>
0x40240774 <start_thread+1140>: nop
0x40240778 <start_thread+1144>: ldi -2d,r25
0x4024077c <start_thread+1148>: cmpb,=,n r25,r21,0x40240758 <start_thread+1112>
0x40240780 <start_thread+1152>: nop
0x40240784 <start_thread+1156>: stw ret0,-1b8(sp)
0x40240788 <start_thread+1160>: sub r0,r21,r21
0x4024078c <start_thread+1164>: stw r21,-1b4(sp)
0x40240790 <start_thread+1168>: ldw -1b4(sp),ret1
0x40240794 <start_thread+1172>: cmpib,=,n e,ret1,0x40240804 <start_thread+1284>
0x40240798 <start_thread+1176>: ldw -1b4(sp),ret0
0x4024079c <start_thread+1180>: cmpb,=,n r5,ret0,0x40240804 <start_thread+1284>
0x402407a0 <start_thread+1184>: ldw -1b8(sp),ret0
0x402407a4 <start_thread+1188>: cmpb,<> ret0,rp,0x40240754 <start_thread+1108>
Thread 2 is in a loop calling the lws code.
(gdb) p/x $rp
$5 = 0x0
(gdb) p/x $ret0
$6 = 0x42169480
Dave
--
J. David Anglin dave.anglin@xxxxxxxxxxxxxx
National Research Council of Canada (613) 990-0752 (FAX: 952-6602)
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