Attachment 941562 Details for Bug 1146967 – gdb analysis of core dump

gdb analysis of core dump

xbeginq-coredump.txt (text/plain), 9.71 KB, created by Amit Shah on 2014-09-26 13:02:45 UTC

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Creator: Amit Shah

Created: 2014-09-26 13:02:45 UTC

Size: 9.71 KB

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>$ gdb -c *2773* /usr/lib/systemd/systemd-udevd
>GNU gdb (GDB) Fedora 7.8-23.fc21
><snip>
>Reading symbols from /usr/lib/systemd/systemd-udevd...Reading symbols from /usr/lib/systemd/systemd-udevd...(no debugging symbols found)...done.
>(no debugging symbols found)...done.
>[New LWP 2773]
>[Thread debugging using libthread_db enabled]
>Using host libthread_db library "/lib64/libthread_db.so.1".
>Core was generated by `/usr/lib/systemd/systemd-udevd'.
>Program terminated with signal SIGILL, Illegal instruction.
>#0  0x00007f68b0b978ba in pthread_rwlock_rdlock () from /lib64/libpthread.so.0
>Missing separate debuginfos, use: debuginfo-install systemd-215-14.fc21.x86_64
>(gdb) x/i $rip
>=> 0x7f68b0b978ba <pthread_rwlock_rdlock+186>:	xbeginq 0x7f68b0b978c0 <pthread_rwlock_rdlock+192>
>(gdb) quit
>
>
>(gdb) disas
>Dump of assembler code for function pthread_rwlock_rdlock:
>   0x00007f68b0b97800 <+0>:	mov    %rdi,%rdx
>   0x00007f68b0b97803 <+3>:	nop
>   0x00007f68b0b97804 <+4>:	movzbl 0x20(%rdi),%eax
>   0x00007f68b0b97808 <+8>:	test   %al,%al
>   0x00007f68b0b9780a <+10>:	jle    0x7f68b0b978a0 <pthread_rwlock_rdlock+160>
>   0x00007f68b0b97810 <+16>:	sub    $0x1,%eax
>   0x00007f68b0b97813 <+19>:	mov    %al,0x20(%rdi)
>   0x00007f68b0b97816 <+22>:	mov    $0x1,%edi
>   0x00007f68b0b9781b <+27>:	xor    %eax,%eax
>   0x00007f68b0b9781d <+29>:	mov    0x1c(%rdx),%esi
>   0x00007f68b0b97820 <+32>:	lock cmpxchg %edi,(%rdx)
>   0x00007f68b0b97824 <+36>:	je     0x7f68b0b9783c <pthread_rwlock_rdlock+60>
>   0x00007f68b0b97826 <+38>:	lea    (%rdx),%rdi
>   0x00007f68b0b97829 <+41>:	sub    $0x80,%rsp
>   0x00007f68b0b97830 <+48>:	callq  0x7f68b0b9af50 <__lll_lock_wait>
>   0x00007f68b0b97835 <+53>:	add    $0x80,%rsp
>   0x00007f68b0b9783c <+60>:	mov    0x18(%rdx),%esi
>   0x00007f68b0b9783f <+63>:	test   %esi,%esi
>   0x00007f68b0b97841 <+65>:	jne    0x7f68b0b9788f <pthread_rwlock_rdlock+143>
>   0x00007f68b0b97843 <+67>:	mov    0x14(%rdx),%ecx
>   0x00007f68b0b97846 <+70>:	test   %ecx,%ecx
>   0x00007f68b0b97848 <+72>:	jne    0x7f68b0b97888 <pthread_rwlock_rdlock+136>
>   0x00007f68b0b9784a <+74>:	mov    0x4(%rdx),%ecx
>   0x00007f68b0b9784d <+77>:	lea    0x1(%rcx),%eax
>   0x00007f68b0b97850 <+80>:	test   %eax,%eax
>   0x00007f68b0b97852 <+82>:	mov    %eax,0x4(%rdx)
>   0x00007f68b0b97855 <+85>:	je     0x7f68b0b97930 <pthread_rwlock_rdlock+304>
>   0x00007f68b0b9785b <+91>:	nop
>   0x00007f68b0b9785c <+92>:	xor    %r8d,%r8d
>   0x00007f68b0b9785f <+95>:	mov    0x1c(%rdx),%esi
>   0x00007f68b0b97862 <+98>:	lock decl (%rdx)
>   0x00007f68b0b97865 <+101>:	je     0x7f68b0b9787d <pthread_rwlock_rdlock+125>
>   0x00007f68b0b97867 <+103>:	lea    (%rdx),%rdi
>   0x00007f68b0b9786a <+106>:	sub    $0x80,%rsp
>   0x00007f68b0b97871 <+113>:	callq  0x7f68b0b9aff0 <__lll_unlock_wake>
>   0x00007f68b0b97876 <+118>:	add    $0x80,%rsp
>   0x00007f68b0b9787d <+125>:	mov    %r8d,%eax
>   0x00007f68b0b97880 <+128>:	retq   
>   0x00007f68b0b97881 <+129>:	nopl   0x0(%rax)
>   0x00007f68b0b97888 <+136>:	mov    0x30(%rdx),%eax
>   0x00007f68b0b9788b <+139>:	test   %eax,%eax
>   0x00007f68b0b9788d <+141>:	je     0x7f68b0b9784a <pthread_rwlock_rdlock+74>
>   0x00007f68b0b9788f <+143>:	mov    %rdx,%rdi
>   0x00007f68b0b97892 <+146>:	jmpq   0x7f68b0b976d0 <__pthread_rwlock_rdlock_slow>
>   0x00007f68b0b97897 <+151>:	nopw   0x0(%rax,%rax,1)
>   0x00007f68b0b978a0 <+160>:	mov    0x20ba12(%rip),%ecx        # 0x7f68b0da32b8 <__elision_aconf+8>
>   0x00007f68b0b978a6 <+166>:	mov    $0xffffffff,%esi
>   0x00007f68b0b978ab <+171>:	test   %ecx,%ecx
>   0x00007f68b0b978ad <+173>:	jle    0x7f68b0b97816 <pthread_rwlock_rdlock+22>
>   0x00007f68b0b978b3 <+179>:	nopl   0x0(%rax,%rax,1)
>   0x00007f68b0b978b8 <+184>:	mov    %esi,%eax
>=> 0x00007f68b0b978ba <+186>:	xbeginq 0x7f68b0b978c0 <pthread_rwlock_rdlock+192>
>   0x00007f68b0b978c0 <+192>:	cmp    $0xffffffff,%eax
>   0x00007f68b0b978c3 <+195>:	jne    0x7f68b0b978e8 <pthread_rwlock_rdlock+232>
>   0x00007f68b0b978c5 <+197>:	mov    (%rdx),%r8d
>   0x00007f68b0b978c8 <+200>:	test   %r8d,%r8d
>   0x00007f68b0b978cb <+203>:	jne    0x7f68b0b978db <pthread_rwlock_rdlock+219>
>   0x00007f68b0b978cd <+205>:	mov    0x18(%rdx),%eax
>   0x00007f68b0b978d0 <+208>:	test   %eax,%eax
>   0x00007f68b0b978d2 <+210>:	jne    0x7f68b0b978db <pthread_rwlock_rdlock+219>
>   0x00007f68b0b978d4 <+212>:	mov    0x4(%rdx),%edi
>   0x00007f68b0b978d7 <+215>:	test   %edi,%edi
>   0x00007f68b0b978d9 <+217>:	je     0x7f68b0b97919 <pthread_rwlock_rdlock+281>
>   0x00007f68b0b978db <+219>:	xabort $0xff
>   0x00007f68b0b978de <+222>:	jmpq   0x7f68b0b97816 <pthread_rwlock_rdlock+22>
>   0x00007f68b0b978e3 <+227>:	nopl   0x0(%rax,%rax,1)
>   0x00007f68b0b978e8 <+232>:	test   $0x2,%al
>   0x00007f68b0b978ea <+234>:	jne    0x7f68b0b97816 <pthread_rwlock_rdlock+22>
>   0x00007f68b0b978f0 <+240>:	test   $0x1,%al
>   0x00007f68b0b978f2 <+242>:	je     0x7f68b0b978fe <pthread_rwlock_rdlock+254>
>   0x00007f68b0b978f4 <+244>:	shr    $0x18,%eax
>   0x00007f68b0b978f7 <+247>:	cmp    $0xff,%eax
>   0x00007f68b0b978fc <+252>:	je     0x7f68b0b97920 <pthread_rwlock_rdlock+288>
>   0x00007f68b0b978fe <+254>:	movsbl 0x20(%rdx),%edi
>   0x00007f68b0b97902 <+258>:	mov    0x20b9ac(%rip),%eax        # 0x7f68b0da32b4 <__elision_aconf+4>
>   0x00007f68b0b97908 <+264>:	cmp    %eax,%edi
>   0x00007f68b0b9790a <+266>:	je     0x7f68b0b9790f <pthread_rwlock_rdlock+271>
>   0x00007f68b0b9790c <+268>:	mov    %al,0x20(%rdx)
>   0x00007f68b0b9790f <+271>:	sub    $0x1,%ecx
>   0x00007f68b0b97912 <+274>:	jne    0x7f68b0b978b8 <pthread_rwlock_rdlock+184>
>   0x00007f68b0b97914 <+276>:	jmpq   0x7f68b0b97816 <pthread_rwlock_rdlock+22>
>   0x00007f68b0b97919 <+281>:	repz retq 
>   0x00007f68b0b9791b <+283>:	nopl   0x0(%rax,%rax,1)
>   0x00007f68b0b97920 <+288>:	movsbl 0x20(%rdx),%edi
>   0x00007f68b0b97924 <+292>:	mov    0x20b986(%rip),%eax        # 0x7f68b0da32b0 <__elision_aconf>
>   0x00007f68b0b9792a <+298>:	cmp    %eax,%edi
>   0x00007f68b0b9792c <+300>:	jne    0x7f68b0b9790c <pthread_rwlock_rdlock+268>
>   0x00007f68b0b9792e <+302>:	jmp    0x7f68b0b9790f <pthread_rwlock_rdlock+271>
>   0x00007f68b0b97930 <+304>:	mov    %ecx,0x4(%rdx)
>   0x00007f68b0b97933 <+307>:	mov    $0xb,%r8d
>   0x00007f68b0b97939 <+313>:	jmpq   0x7f68b0b9785f <pthread_rwlock_rdlock+95>
>End of assembler dump.
>
>
>$ gdb -c core.lvmetad.0.3441c37921b8455d9995665dcf29c8f9.812.1411709357000000 /usr/sbin/lvmetad
><snip>
>
>Core was generated by `/usr/sbin/lvmetad -f'.
>Program terminated with signal SIGILL, Illegal instruction.
>#0  0x00007f01a7020ca3 in __lll_lock_elision () from /lib64/libpthread.so.0
>Missing separate debuginfos, use: debuginfo-install lvm2-2.02.111-1.fc21.x86_64
>(gdb) x/i $rip
>=> 0x7f01a7020ca3 <__lll_lock_elision+99>:	xbeginq 0x7f01a7020ca9 <__lll_lock_elision+105>
>(gdb) disas
>Dump of assembler code for function __lll_lock_elision:
>   0x00007f01a7020c40 <+0>:	movzwl (%rsi),%eax
>   0x00007f01a7020c43 <+3>:	mov    %rdi,%r8
>   0x00007f01a7020c46 <+6>:	test   %ax,%ax
>   0x00007f01a7020c49 <+9>:	jle    0x7f01a7020c80 <__lll_lock_elision+64>
>   0x00007f01a7020c4b <+11>:	sub    $0x1,%eax
>   0x00007f01a7020c4e <+14>:	mov    %ax,(%rsi)
>   0x00007f01a7020c51 <+17>:	mov    $0x1,%edi
>   0x00007f01a7020c56 <+22>:	xor    %eax,%eax
>   0x00007f01a7020c58 <+24>:	mov    %edx,%esi
>   0x00007f01a7020c5a <+26>:	lock cmpxchg %edi,(%r8)
>   0x00007f01a7020c5f <+31>:	je     0x7f01a7020c77 <__lll_lock_elision+55>
>   0x00007f01a7020c61 <+33>:	lea    (%r8),%rdi
>   0x00007f01a7020c64 <+36>:	sub    $0x80,%rsp
>   0x00007f01a7020c6b <+43>:	callq  0x7f01a701df50 <__lll_lock_wait>
>   0x00007f01a7020c70 <+48>:	add    $0x80,%rsp
>   0x00007f01a7020c77 <+55>:	xor    %eax,%eax
>   0x00007f01a7020c79 <+57>:	retq   
>   0x00007f01a7020c7a <+58>:	nopw   0x0(%rax,%rax,1)
>   0x00007f01a7020c80 <+64>:	mov    0x205632(%rip),%ecx        # 0x7f01a72262b8 <__elision_aconf+8>
>   0x00007f01a7020c86 <+70>:	mov    $0xffffffff,%edi
>   0x00007f01a7020c8b <+75>:	test   %ecx,%ecx
>   0x00007f01a7020c8d <+77>:	jg     0x7f01a7020ca1 <__lll_lock_elision+97>
>   0x00007f01a7020c8f <+79>:	jmp    0x7f01a7020c51 <__lll_lock_elision+17>
>   0x00007f01a7020c91 <+81>:	nopl   0x0(%rax)
>   0x00007f01a7020c98 <+88>:	test   $0x2,%al
>   0x00007f01a7020c9a <+90>:	je     0x7f01a7020cc0 <__lll_lock_elision+128>
>   0x00007f01a7020c9c <+92>:	sub    $0x1,%ecx
>   0x00007f01a7020c9f <+95>:	je     0x7f01a7020c51 <__lll_lock_elision+17>
>   0x00007f01a7020ca1 <+97>:	mov    %edi,%eax
>=> 0x00007f01a7020ca3 <+99>:	xbeginq 0x7f01a7020ca9 <__lll_lock_elision+105>
>   0x00007f01a7020ca9 <+105>:	cmp    $0xffffffff,%eax
>   0x00007f01a7020cac <+108>:	jne    0x7f01a7020c98 <__lll_lock_elision+88>
>   0x00007f01a7020cae <+110>:	mov    (%r8),%eax
>   0x00007f01a7020cb1 <+113>:	test   %eax,%eax
>   0x00007f01a7020cb3 <+115>:	je     0x7f01a7020c77 <__lll_lock_elision+55>
>   0x00007f01a7020cb5 <+117>:	xabort $0xff
>   0x00007f01a7020cb8 <+120>:	jmp    0x7f01a7020c9c <__lll_lock_elision+92>
>   0x00007f01a7020cba <+122>:	nopw   0x0(%rax,%rax,1)
>   0x00007f01a7020cc0 <+128>:	test   $0x1,%al
>   0x00007f01a7020cc2 <+130>:	je     0x7f01a7020cce <__lll_lock_elision+142>
>   0x00007f01a7020cc4 <+132>:	shr    $0x18,%eax
>   0x00007f01a7020cc7 <+135>:	cmp    $0xff,%eax
>   0x00007f01a7020ccc <+140>:	je     0x7f01a7020ce4 <__lll_lock_elision+164>
>   0x00007f01a7020cce <+142>:	movswl (%rsi),%ecx
>   0x00007f01a7020cd1 <+145>:	mov    0x2055dd(%rip),%eax        # 0x7f01a72262b4 <__elision_aconf+4>
>   0x00007f01a7020cd7 <+151>:	cmp    %eax,%ecx
>   0x00007f01a7020cd9 <+153>:	jne    0x7f01a7020c4e <__lll_lock_elision+14>
>   0x00007f01a7020cdf <+159>:	jmpq   0x7f01a7020c51 <__lll_lock_elision+17>
>   0x00007f01a7020ce4 <+164>:	movswl (%rsi),%ecx
>   0x00007f01a7020ce7 <+167>:	mov    0x2055c3(%rip),%eax        # 0x7f01a72262b0 <__elision_aconf>
>   0x00007f01a7020ced <+173>:	cmp    %eax,%ecx
>   0x00007f01a7020cef <+175>:	jne    0x7f01a7020c4e <__lll_lock_elision+14>
>   0x00007f01a7020cf5 <+181>:	jmpq   0x7f01a7020c51 <__lll_lock_elision+17>
>End of assembler dump.
>(gdb) quit

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Attachments on bug 1146967: 941562 | 941563