Attachment 96189 Details for Bug 134757 – file.txt

file.txt

file.txt (text/plain), 13.64 KB, created by Stephen Sanders on 2009-05-20 17:00:12 UTC

(hide)

Description:

Filename:

MIME Type:

Creator: Stephen Sanders

Created: 2009-05-20 17:00:12 UTC

Size: 13.64 KB

patch

obsolete

>The following is gdb output from debugging a /usr/local/bin/bash 
>core drop. Note that ds == ss.
>==============================================================================
>(gdb) 
>(gdb) bt
>#0  0x080759fe in kill_pid ()
>#1  0x08074dc8 in wait_for ()
>#2  0x08067d18 in execute_command_internal ()
>#3  0x08068af1 in execute_command_internal ()
>#4  0x08068cb3 in execute_command_internal ()
>#5  0x08067ef5 in execute_command_internal ()
>#6  0x08097317 in parse_and_execute ()
>#7  0x0807cadc in command_substitute ()
>#8  0x080801bc in pat_subst ()
>#9  0x0807a6cc in cond_expand_word ()
>#10 0x0807a76d in cond_expand_word ()
>#11 0x0807a7c6 in expand_string_unsplit ()
>#12 0x0807a44c in string_rest_of_args ()
>#13 0x08079e7c in strip_trailing_ifs_whitespace ()
>#14 0x0807a018 in do_assignment ()
>#15 0x0808175e in expand_words_shellexp ()
>#16 0x080811a4 in expand_words ()
>#17 0x0806a95c in execute_command_internal ()
>#18 0x08067cab in execute_command_internal ()
>#19 0x08067796 in execute_command ()
>#20 0x08068c63 in execute_command_internal ()
>#21 0x08067ef5 in execute_command_internal ()
>#22 0x08067796 in execute_command ()
>---Type <return> to continue, or q <return> to quit---q
>Quit
>(gdb) info frame
>Stack level 0, frame at 0xffffca40:
> eip = 0x80759fe in kill_pid; saved eip 0x8074dc8
> called by frame at 0xffffca90
> Arglist at 0xffffca38, args: 
> Locals at 0xffffca38, Previous frame's sp is 0xffffca40
> Saved registers:
>  ebx at 0xffffca2c, ebp at 0xffffca38, esi at 0xffffca30, edi at 0xffffca34,
>  eip at 0xffffca3c
>(gdb) disassemble 0x80759fe
>Dump of assembler code for function kill_pid:
>0x0807579c <kill_pid+0>:	push   %ebp
>0x0807579d <kill_pid+1>:	mov    %esp,%ebp
>0x0807579f <kill_pid+3>:	push   %edi
>0x080757a0 <kill_pid+4>:	push   %esi
>0x080757a1 <kill_pid+5>:	push   %ebx
>0x080757a2 <kill_pid+6>:	sub    $0x3c,%esp
>0x080757a5 <kill_pid+9>:	mov    0xc(%ebp),%edi
>0x080757a8 <kill_pid+12>:	movl   $0x0,0xffffffc0(%ebp)
>0x080757af <kill_pid+19>:	cmpl   $0x0,0x10(%ebp)
>0x080757b3 <kill_pid+23>:	je     0x8075948 <kill_pid+428>
>0x080757b9 <kill_pid+29>:	sub    $0xc,%esp
>0x080757bc <kill_pid+32>:	lea    0xffffffd8(%ebp),%esi
>0x080757bf <kill_pid+35>:	push   %esi
>0x080757c0 <kill_pid+36>:	call   0x8059908 <_init+316>
>0x080757c5 <kill_pid+41>:	add    $0x8,%esp
>0x080757c8 <kill_pid+44>:	push   $0x14
>0x080757ca <kill_pid+46>:	push   %esi
>0x080757cb <kill_pid+47>:	call   0x8059b78 <_init+940>
>0x080757d0 <kill_pid+52>:	lea    0xffffffc8(%ebp),%ebx
>0x080757d3 <kill_pid+55>:	mov    %ebx,(%esp)
>0x080757d6 <kill_pid+58>:	call   0x8059908 <_init+316>
>0x080757db <kill_pid+63>:	add    $0xc,%esp
>---Type <return> to continue, or q <return> to quit--- 
>0x080757de <kill_pid+66>:	push   %ebx
>0x080757df <kill_pid+67>:	push   %esi
>0x080757e0 <kill_pid+68>:	push   $0x1
>0x080757e2 <kill_pid+70>:	call   0x805a2b8 <close+112>
>0x080757e7 <kill_pid+75>:	add    $0xc,%esp
>0x080757ea <kill_pid+78>:	lea    0xffffffc4(%ebp),%eax
>0x080757ed <kill_pid+81>:	push   %eax
>0x080757ee <kill_pid+82>:	push   $0x0
>0x080757f0 <kill_pid+84>:	pushl  0x8(%ebp)
>0x080757f3 <kill_pid+87>:	call   0x8073d4c <kill_current_pipeline+20>
>0x080757f8 <kill_pid+92>:	mov    %eax,%ebx
>0x080757fa <kill_pid+94>:	add    $0x10,%esp
>0x080757fd <kill_pid+97>:	cmpl   $0xffffffff,0xffffffc4(%ebp)
>0x08075801 <kill_pid+101>:	je     0x807591c <kill_pid+384>
>0x08075807 <kill_pid+107>:	mov    0xffffffc4(%ebp),%edx
>0x0807580a <kill_pid+110>:	mov    0x80d3d60,%eax
>0x0807580f <kill_pid+115>:	mov    (%eax,%edx,4),%eax
>0x08075812 <kill_pid+118>:	andl   $0xfffffffd,0x10(%eax)
>0x08075816 <kill_pid+122>:	mov    0xffffffc4(%ebp),%edx
>0x08075819 <kill_pid+125>:	mov    0x80d3d60,%eax
>0x0807581e <kill_pid+130>:	mov    (%eax,%edx,4),%edx
>0x08075821 <kill_pid+133>:	mov    0x8(%edx),%eax
>0x08075824 <kill_pid+136>:	cmp    0x80cd618,%eax
>---Type <return> to continue, or q <return> to quit---      
>0x0807582a <kill_pid+142>:	jne    0x8075878 <kill_pid+220>
>0x0807582c <kill_pid+144>:	mov    0x4(%edx),%ebx
>0x0807582f <kill_pid+147>:	nop    
>0x08075830 <kill_pid+148>:	sub    $0x8,%esp
>0x08075833 <kill_pid+151>:	push   %edi
>0x08075834 <kill_pid+152>:	pushl  0x4(%ebx)
>0x08075837 <kill_pid+155>:	call   0x8059ca8 <_init+1244>
>0x0807583c <kill_pid+160>:	add    $0x10,%esp
>0x0807583f <kill_pid+163>:	cmpl   $0x0,0xc(%ebx)
>0x08075843 <kill_pid+167>:	jne    0x8075860 <kill_pid+196>
>0x08075845 <kill_pid+169>:	cmp    $0xf,%edi
>0x08075848 <kill_pid+172>:	je     0x807584f <kill_pid+179>
>0x0807584a <kill_pid+174>:	cmp    $0x1,%edi
>0x0807584d <kill_pid+177>:	jne    0x8075860 <kill_pid+196>
>0x0807584f <kill_pid+179>:	sub    $0x8,%esp
>0x08075852 <kill_pid+182>:	push   $0x13
>0x08075854 <kill_pid+184>:	pushl  0x4(%ebx)
>0x08075857 <kill_pid+187>:	call   0x8059ca8 <_init+1244>
>0x0807585c <kill_pid+192>:	add    $0x10,%esp
>0x0807585f <kill_pid+195>:	nop    
>0x08075860 <kill_pid+196>:	mov    (%ebx),%ebx
>0x08075862 <kill_pid+198>:	mov    0xffffffc4(%ebp),%eax
>0x08075865 <kill_pid+201>:	mov    0x80d3d60,%edx
>---Type <return> to continue, or q <return> to quit---
>0x0807586b <kill_pid+207>:	mov    (%edx,%eax,4),%eax
>0x0807586e <kill_pid+210>:	cmp    %ebx,0x4(%eax)
>0x08075871 <kill_pid+213>:	jne    0x8075830 <kill_pid+148>
>0x08075873 <kill_pid+215>:	jmp    0x8075930 <kill_pid+404>
>0x08075878 <kill_pid+220>:	sub    $0x8,%esp
>0x0807587b <kill_pid+223>:	push   %edi
>0x0807587c <kill_pid+224>:	mov    0xffffffc4(%ebp),%eax
>0x0807587f <kill_pid+227>:	mov    0x80d3d60,%edx
>0x08075885 <kill_pid+233>:	mov    (%edx,%eax,4),%eax
>0x08075888 <kill_pid+236>:	pushl  0x8(%eax)
>0x0807588b <kill_pid+239>:	call   0x8059e88 <unlink+160>
>0x08075890 <kill_pid+244>:	mov    %eax,0xffffffc0(%ebp)
>0x08075893 <kill_pid+247>:	add    $0x10,%esp
>0x08075896 <kill_pid+250>:	test   %ebx,%ebx
>0x08075898 <kill_pid+252>:	je     0x8075930 <kill_pid+404>
>0x0807589e <kill_pid+258>:	mov    0xffffffc4(%ebp),%eax
>0x080758a1 <kill_pid+261>:	mov    0x80d3d60,%edx
>0x080758a7 <kill_pid+267>:	mov    (%edx,%eax,4),%eax
>0x080758aa <kill_pid+270>:	cmpl   $0x1,0xc(%eax)
>0x080758ae <kill_pid+274>:	jne    0x80758d6 <kill_pid+314>
>0x080758b0 <kill_pid+276>:	cmp    $0xf,%edi
>0x080758b3 <kill_pid+279>:	je     0x80758ba <kill_pid+286>
>0x080758b5 <kill_pid+281>:	cmp    $0x1,%edi
>---Type <return> to continue, or q <return> to quit---
>0x080758b8 <kill_pid+284>:	jne    0x80758d6 <kill_pid+314>
>0x080758ba <kill_pid+286>:	sub    $0x8,%esp
>0x080758bd <kill_pid+289>:	push   $0x13
>0x080758bf <kill_pid+291>:	mov    0xffffffc4(%ebp),%eax
>0x080758c2 <kill_pid+294>:	mov    0x80d3d60,%edx
>0x080758c8 <kill_pid+300>:	mov    (%edx,%eax,4),%eax
>0x080758cb <kill_pid+303>:	pushl  0x8(%eax)
>0x080758ce <kill_pid+306>:	call   0x8059e88 <unlink+160>
>0x080758d3 <kill_pid+311>:	add    $0x10,%esp
>0x080758d6 <kill_pid+314>:	test   %ebx,%ebx
>0x080758d8 <kill_pid+316>:	je     0x8075930 <kill_pid+404>
>0x080758da <kill_pid+318>:	mov    0xffffffc4(%ebp),%edx
>0x080758dd <kill_pid+321>:	mov    0x80d3d60,%eax
>0x080758e2 <kill_pid+326>:	mov    (%eax,%edx,4),%eax
>0x080758e5 <kill_pid+329>:	cmpl   $0x1,0xc(%eax)
>0x080758e9 <kill_pid+333>:	jne    0x8075930 <kill_pid+404>
>0x080758eb <kill_pid+335>:	cmp    $0x13,%edi
>0x080758ee <kill_pid+338>:	jne    0x8075930 <kill_pid+404>
>0x080758f0 <kill_pid+340>:	push   %edx
>0x080758f1 <kill_pid+341>:	call   0x807543c <reap_dead_jobs+580>
>0x080758f6 <kill_pid+346>:	mov    0xffffffc4(%ebp),%edx
>0x080758f9 <kill_pid+349>:	mov    0x80d3d60,%eax
>0x080758fe <kill_pid+354>:	mov    (%eax,%edx,4),%eax
>---Type <return> to continue, or q <return> to quit---
>0x08075901 <kill_pid+357>:	andl   $0xfffffffe,0x10(%eax)
>0x08075905 <kill_pid+361>:	mov    0xffffffc4(%ebp),%edx
>0x08075908 <kill_pid+364>:	mov    0x80d3d60,%eax
>0x0807590d <kill_pid+369>:	mov    (%eax,%edx,4),%eax
>0x08075910 <kill_pid+372>:	orl    $0x2,0x10(%eax)
>0x08075914 <kill_pid+376>:	add    $0x4,%esp
>0x08075917 <kill_pid+379>:	jmp    0x8075930 <kill_pid+404>
>0x08075919 <kill_pid+381>:	lea    0x0(%esi),%esi
>0x0807591c <kill_pid+384>:	sub    $0x8,%esp
>0x0807591f <kill_pid+387>:	push   %edi
>0x08075920 <kill_pid+388>:	pushl  0x8(%ebp)
>0x08075923 <kill_pid+391>:	call   0x8059e88 <unlink+160>
>0x08075928 <kill_pid+396>:	mov    %eax,0xffffffc0(%ebp)
>0x0807592b <kill_pid+399>:	add    $0x10,%esp
>0x0807592e <kill_pid+402>:	mov    %esi,%esi
>0x08075930 <kill_pid+404>:	sub    $0x4,%esp
>0x08075933 <kill_pid+407>:	push   $0x0
>0x08075935 <kill_pid+409>:	lea    0xffffffc8(%ebp),%eax
>0x08075938 <kill_pid+412>:	push   %eax
>0x08075939 <kill_pid+413>:	push   $0x3
>0x0807593b <kill_pid+415>:	call   0x805a2b8 <close+112>
>0x08075940 <kill_pid+420>:	add    $0x10,%esp
>0x08075943 <kill_pid+423>:	jmp    0x807595a <kill_pid+446>
>---Type <return> to continue, or q <return> to quit---
>0x08075945 <kill_pid+425>:	lea    0x0(%esi),%esi
>0x08075948 <kill_pid+428>:	sub    $0x8,%esp
>0x0807594b <kill_pid+431>:	push   %edi
>0x0807594c <kill_pid+432>:	pushl  0x8(%ebp)
>0x0807594f <kill_pid+435>:	call   0x8059ca8 <_init+1244>
>0x08075954 <kill_pid+440>:	mov    %eax,0xffffffc0(%ebp)
>0x08075957 <kill_pid+443>:	add    $0x10,%esp
>0x0807595a <kill_pid+446>:	mov    0xffffffc0(%ebp),%eax
>0x0807595d <kill_pid+449>:	lea    0xfffffff4(%ebp),%esp
>0x08075960 <kill_pid+452>:	pop    %ebx
>0x08075961 <kill_pid+453>:	pop    %esi
>0x08075962 <kill_pid+454>:	pop    %edi
>0x08075963 <kill_pid+455>:	leave  
>0x08075964 <kill_pid+456>:	ret    
>0x08075965 <kill_pid+457>:	lea    0x0(%esi),%esi
>0x08075968 <kill_pid+460>:	push   %ebp
>0x08075969 <kill_pid+461>:	mov    %esp,%ebp
>0x0807596b <kill_pid+463>:	push   %ebx
>0x0807596c <kill_pid+464>:	sub    $0x4,%esp
>0x0807596f <kill_pid+467>:	call   0x8059d58 <_init+1420>
>0x08075974 <kill_pid+472>:	mov    (%eax),%ebx
>0x08075976 <kill_pid+474>:	incl   0x80d41d4
>0x0807597c <kill_pid+480>:	cmpl   $0x0,0x80d41d8
>---Type <return> to continue, or q <return> to quit---
>0x08075983 <kill_pid+487>:	jne    0x8075994 <kill_pid+504>
>0x08075985 <kill_pid+489>:	sub    $0x8,%esp
>0x08075988 <kill_pid+492>:	push   $0x0
>0x0807598a <kill_pid+494>:	push   $0xffffffff
>0x0807598c <kill_pid+496>:	call   0x80759a0 <kill_pid+516>
>0x08075991 <kill_pid+501>:	add    $0x10,%esp
>0x08075994 <kill_pid+504>:	call   0x8059d58 <_init+1420>
>0x08075999 <kill_pid+509>:	mov    %ebx,(%eax)
>0x0807599b <kill_pid+511>:	mov    0xfffffffc(%ebp),%ebx
>0x0807599e <kill_pid+514>:	leave  
>0x0807599f <kill_pid+515>:	ret    
>0x080759a0 <kill_pid+516>:	push   %ebp
>0x080759a1 <kill_pid+517>:	mov    %esp,%ebp
>0x080759a3 <kill_pid+519>:	push   %edi
>0x080759a4 <kill_pid+520>:	push   %esi
>0x080759a5 <kill_pid+521>:	push   %ebx
>0x080759a6 <kill_pid+522>:	sub    $0x1c,%esp
>0x080759a9 <kill_pid+525>:	mov    $0x0,%edi
>0x080759ae <kill_pid+530>:	movl   $0x0,0xffffffe8(%ebp)
>0x080759b5 <kill_pid+537>:	movl   $0xffffffff,0xffffffe4(%ebp)
>0x080759bc <kill_pid+544>:	cmpl   $0x0,0x80cd634
>0x080759c3 <kill_pid+551>:	je     0x80759d3 <kill_pid+567>
>0x080759c5 <kill_pid+553>:	mov    $0x6,%esi
>---Type <return> to continue, or q <return> to quit---
>0x080759ca <kill_pid+558>:	cmpl   $0x0,0x80d5454
>0x080759d1 <kill_pid+565>:	je     0x80759d8 <kill_pid+572>
>0x080759d3 <kill_pid+567>:	mov    $0x0,%esi
>0x080759d8 <kill_pid+572>:	cmpl   $0x0,0x80d41d4
>0x080759df <kill_pid+579>:	jne    0x80759e7 <kill_pid+587>
>0x080759e1 <kill_pid+581>:	cmpl   $0x0,0xc(%ebp)
>0x080759e5 <kill_pid+585>:	jne    0x80759ea <kill_pid+590>
>0x080759e7 <kill_pid+587>:	or     $0x1,%esi
>0x080759ea <kill_pid+590>:	sub    $0x4,%esp
>0x080759ed <kill_pid+593>:	push   %esi
>0x080759ee <kill_pid+594>:	lea    0xfffffff0(%ebp),%eax
>0x080759f1 <kill_pid+597>:	push   %eax
>0x080759f2 <kill_pid+598>:	push   $0xffffffff
>0x080759f4 <kill_pid+600>:	call   0x8059838 <_init+108>
>0x080759f9 <kill_pid+605>:	mov    %eax,%ebx
>0x080759fb <kill_pid+607>:	add    $0x10,%esp
>0x080759fe <kill_pid+610>:	cmpl   $0x0,0x80d41d4
>0x08075a05 <kill_pid+617>:	jle    0x8075a15 <kill_pid+633>
>
>(gdb) info registers
>eax            0x369	873
>ecx            0x0	0
>edx            0x0	0
>ebx            0x369	873
>esp            0xffffca10	0xffffca10
>ebp            0xffffca38	0xffffca38
>esi            0x0	0
>edi            0x0	0
>eip            0x80759fe	0x80759fe
>eflags         0x10282	66178
>cs             0x1b	27
>ss             0x23	35
>ds             0x23	35
>es             0x23	35
>fs             0x23	35
>gs             0x23	35
>
>===============================================================================
>The following is a gdb session that is not a core drop.  Here ds != ss
>===============================================================================
>
>alt-4100-2[1036] # gdb /usr/local/bin/bash 
>GNU gdb 6.1.1 [FreeBSD]
>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 "amd64-marcel-freebsd"...(no debugging symbols found)...
>(gdb) break execute_command
>Breakpoint 1 at 0x8067755
>(gdb) run
>Starting program: /usr/local/bin/bash 
>bash-3.00# ls
>
>Breakpoint 1, 0x08067755 in execute_command ()
>(gdb) bt
>#0  0x08067755 in execute_command ()
>#1  0x0805c749 in reader_loop ()
>#2  0x0805aba0 in main ()
>(gdb) info frame
>Stack level 0, frame at 0xffffdc00:
> eip = 0x8067755 in execute_command; saved eip 0x805c749
> called by frame at 0xffffdc30
> Arglist at 0xffffdbf8, args: 
> Locals at 0xffffdbf8, Previous frame's sp is 0xffffdc00
> Saved registers:
>  ebx at 0xffffdbf0, ebp at 0xffffdbf8, esi at 0xffffdbf4, eip at 0xffffdbfc
>(gdb) info registers
>eax            0x80dd5a0	135124384
>ecx            0x0	0
>edx            0xffffd400	-11264
>ebx            0x0	0
>esp            0xffffdbf0	0xffffdbf0
>ebp            0xffffdbf8	0xffffdbf8
>esi            0x0	0
>edi            0xffffdcd4	-9004
>eip            0x8067755	0x8067755
>eflags         0x292	658
>cs             0x1b	27
>ss             0x23	35
>ds             0x0	0
>es             0x0	0
>fs             0x0	0
>gs             0x0	0
>(gdb)

Actions: View

Attachments on bug 134757: 96189 | 96190