Re: Segmentation Faults - OpenBSD

[Sebastian Reitenbach]

Hi,

Am Dienstag, April 10, 2018 00:28 CEST, Riccardo Mottola <address@hidden> 
schrieb:

> Hi,
>
> On 2018-04-07 18:04:12 +0000 David Chisnall <address@hidden> wrote:
>
> > > No idea if either of them are relevant, but I’ve just pushed two fixes 
> > > for > memory-related errors in -base.  One writes some data through an > 
> > > uninitialised pointer when an exception is thrown and the platform 
> > > doesn’t > provide backtrace.  The other treats things as GSString 
> > > instances even if > they aren’t and so can potentially dereference an 
> > > invalid pointer.
> > > Either of these could cause random crashes in some usage on some 
> > > platforms.
>
>
> unfortunatley not. I still get a hard crash while running "plmerge". For me 
> it is OpenBSD only, but I got that Gregory has issues on linux to.
>
> I was able to compile with debug and get a better starcktrace, although I 
> think it is corrupted and loops.. or we have some case of /thread recurision

while debugging GNUMail, I also tried gnustep-base from git, and I saw the very 
same backtrace, when I tried to rebuild gnustep-gui afterward.
Threre I saw it happen in make_services.

I'm also on OpenBSD, but amd64, built with clang 5.0.1 libobjc2 and 
gnustep-make, gnustep-gui are latest releases, only gnustep-base was from git.

Sebastian

>
> Riccardo
>
>
> Program received signal SIGSEGV, Segmentation fault.
> 0x0ba98aac in _libc_memcpy (dst0=0x384, src0=0x7a6f60c4, length=88)
>     at /usr/src/lib/libc/string/memcpy.c:54
> 54      /usr/src/lib/libc/string/memcpy.c: No such file or directory.
>         in /usr/src/lib/libc/string/memcpy.c
> Current language:  auto; currently minimal
> (gdb) bt
> #0  0x0ba98aac in _libc_memcpy (dst0=0x384, src0=0x7a6f60c4, length=88)
>     at /usr/src/lib/libc/string/memcpy.c:54
> #1  0x0ba9f956 in _libc_arc4random_buf (buf=0x85d03bd4, n=Variable "n" is not 
> available.
> )
>     at /usr/src/lib/libc/crypt/arc4random.c:154
> #2  0x0ba60cfa in omalloc (sz=Variable "sz" is not available.
> ) at /usr/src/lib/libc/stdlib/malloc.c:308
> #3  0x0ba60b72 in malloc (size=Variable "size" is not available.
> ) at /usr/src/lib/libc/stdlib/malloc.c:1273
> #4  0x0869dd26 in default_malloc (zone=0x286ffa60, size=88) at NSZone.m:124
> #5  0x086a0722 in NSZoneMalloc (zone=0x286ffa60, size=88) at NSZone.m:1779
> #6  0x085d3bbe in NSAllocateObject (aClass=0x28695760, extraBytes=0,     
> zone=0x286ffa60) at NSObject.m:788
> #7  0x08586b93 in +[NSHashTable allocWithZone:] (self=0x28695760,     
> _cmd=0x286957f0, aZone=0x286ffa60) at NSHashTable.m:51
> #8  0x08524303 in NSCreateHashTableWithZone (k=
>       {hash = 0x8519e11 <_NS_non_owned_void_p_hash>, isEqual = 0x8519e1c 
> <_NS_non_owned_void_p_is_equal>, retain = 0x8519e2a 
> <_NS_non_owned_void_p_retain>, release = 0x8519e30 
> <_NS_non_owned_void_p_release>, describe = 0x8519e36 
> <_NS_non_owned_void_p_describe>}, capacity=10, zone=0x286ffa60)
>     at NSConcreteHashTable.m:308
> #9  0x08524169 in NSCreateHashTable (callBacks=
>       {hash = 0x8519e11 <_NS_non_owned_void_p_hash>, isEqual = 0x8519e1c 
> <_NS_non_owned_void_p_is_equal>, retain = 0x8519e2a 
> <_NS_non_owned_void_p_retain>, release = 0x8519e30 
> <_NS_non_owned_void_p_release>, describe = 0x8519e36 
> <_NS_non_owned_void_p_describe>}, capacity=10) at NSConcreteHashTable.m:283
> #10 0x0864d4e7 in -[NSThread init] (self=0x7d5aea10, _cmd=0x286c3cc0)
>     at NSThread.m:1092
> #11 0x085d428d in +[NSObject new] (self=0x286e5080, _cmd=0x286e5248)
>     at NSObject.m:1233
> #12 0x0864ca6b in +[NSThread _createThreadForCurrentPthread] 
> (self=0x286e5080,     _cmd=0x286e5438) at NSThread.m:844
> #13 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #14 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #15 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #16 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] (self=0x7d5ae110, 
>     _cmd=0x286e5270) at NSThread.m:769
> #17 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] 
> (self=0x286e5080,     _cmd=0x286e5438) at NSThread.m:846
> #18 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #19 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #20 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #21 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] (self=0x7d5ae290, 
>     _cmd=0x286e5270) at NSThread.m:769
> #22 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] 
> (self=0x286e5080,     _cmd=0x286e5438) at NSThread.m:846
> #23 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #24 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #25 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #26 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] (self=0x7d5ae310, 
>     _cmd=0x286e5270) at NSThread.m:769
> #27 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] 
> (self=0x286e5080,     _cmd=0x286e5438) at NSThread.m:846
> #28 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #29 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #30 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #31 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] (self=0x7cb4f990, 
>     _cmd=0x286e5270) at NSThread.m:769
> #32 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] 
> (self=0x286e5080,     _cmd=0x286e5438) at NSThread.m:846
> #33 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #34 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #35 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #36 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] (self=0x7d5ae190, 
>     _cmd=0x286e5270) at NSThread.m:769
> #37 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] 
> (self=0x286e5080,     _cmd=0x286e5438) at NSThread.m:846
> #38 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #39 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #40 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #41 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] (self=0x7cb4f610, 
>     _cmd=0x286e5270) at NSThread.m:769
> #42 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] 
> (self=0x286e5080,     _cmd=0x286e5438) at NSThread.m:846
> #43 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #44 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #45 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #46 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] (self=0x7925fb90, 
>     _cmd=0x286e5270) at NSThread.m:769
> #47 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] 
> (self=0x286e5080,     _cmd=0x286e5438) at NSThread.m:846
> #48 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #49 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #50 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #51 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] (self=0x7925f990, 
>     _cmd=0x286e5270) at NSThread.m:769
> #52 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] 
> (self=0x286e5080,     _cmd=0x286e5438) at NSThread.m:846
> #53 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #54 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #55 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #56 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] (self=0x7d5ae690, 
>     _cmd=0x286e5270) at NSThread.m:769
> #57 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] 
> (self=0x286e5080,     _cmd=0x286e5438) at NSThread.m:846
> #58 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #59 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #60 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #61 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] (self=0x7b282590, 
>     _cmd=0x286e5270) at NSThread.m:769
> #62 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] 
> (self=0x286e5080,     _cmd=0x286e5438) at NSThread.m:846
> #63 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #64 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #65 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #66 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] (self=0x7b282510, 
>     _cmd=0x286e5270) at NSThread.m:769
> #67 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] 
> (self=0x286e5080,     _cmd=0x286e5438) at NSThread.m:846
> #68 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #69 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #70 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #71 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] (self=0x7925fd10, 
>     _cmd=0x286e5270) at NSThread.m:769
> #72 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] 
> (self=0x286e5080,     _cmd=0x286e5438) at NSThread.m:846
> #73 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #74 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #75 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #76 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] (self=0x7cb4fd90, 
>     _cmd=0x286e5270) at NSThread.m:769
> #77 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] 
> (self=0x286e5080,     _cmd=0x286e5438) at NSThread.m:846
> #78 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #79 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #80 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #81 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] (self=0x7925f910, 
>     _cmd=0x286e5270) at NSThread.m:769
> #82 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] 
> (self=0x286e5080,     _cmd=0x286e5438) at NSThread.m:846
> #83 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #84 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #85 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #86 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] (self=0x7925f410, 
>     _cmd=0x286e5270) at NSThread.m:769
> #87 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] 
> (self=0x286e5080,     _cmd=0x286e5438) at NSThread.m:846
> #88 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #89 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #90 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #91 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] (self=0x7cb4f910, 
>     _cmd=0x286e5270) at NSThread.m:769
> #92 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] 
> (self=0x286e5080,     _cmd=0x286e5438) at NSThread.m:846
> #93 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #94 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #95 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #96 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] (self=0x7b282290, 
>     _cmd=0x286e5270) at NSThread.m:769
> #97 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] 
> (self=0x286e5080,     _cmd=0x286e5438) at NSThread.m:846
> #98 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #99 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #100 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #101 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] 
> (self=0x7925f010,     _cmd=0x286e5270) at NSThread.m:769
> #102 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] (
>     self=0x286e5080, _cmd=0x286e5438) at NSThread.m:846
> #103 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #104 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #105 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #106 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] 
> (self=0x7925f710,     _cmd=0x286e5270) at NSThread.m:769
> #107 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] (
>     self=0x286e5080, _cmd=0x286e5438) at NSThread.m:846
> #108 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #109 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #110 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #111 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] 
> (self=0x7b282d90,     _cmd=0x286e5270) at NSThread.m:769
> #112 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] (
>     self=0x286e5080, _cmd=0x286e5438) at NSThread.m:846
> #113 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #114 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #115 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #116 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] 
> (self=0x7b282310,     _cmd=0x286e5270) at NSThread.m:769
> #117 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] (
>     self=0x286e5080, _cmd=0x286e5438) at NSThread.m:846
> #118 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #119 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #120 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #121 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] 
> (self=0x7900d810,     _cmd=0x286e5270) at NSThread.m:769
> #122 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] (
>     self=0x286e5080, _cmd=0x286e5438) at NSThread.m:846
> #123 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #124 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #125 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #126 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] 
> (self=0x7d5ae390,     _cmd=0x286e5270) at NSThread.m:769
> #127 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] (
>     self=0x286e5080, _cmd=0x286e5438) at NSThread.m:846
> #128 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #129 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #130 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #131 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] 
> (self=0x7900d590,     _cmd=0x286e5270) at NSThread.m:769
> #132 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] (
>     self=0x286e5080, _cmd=0x286e5438) at NSThread.m:846
> #133 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #134 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #135 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #136 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] 
> (self=0x7cb4f510,     _cmd=0x286e5270) at NSThread.m:769
> #137 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] (
>     self=0x286e5080, _cmd=0x286e5438) at NSThread.m:846
> #138 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #139 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #140 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #141 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] 
> (self=0x7b282c90,     _cmd=0x286e5270) at NSThread.m:769
> #142 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] (
>     self=0x286e5080, _cmd=0x286e5438) at NSThread.m:846
> #143 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #144 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #145 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #146 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] 
> (self=0x7ea0cf90,     _cmd=0x286e5270) at NSThread.m:769
> #147 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] (
>     self=0x286e5080, _cmd=0x286e5438) at NSThread.m:846
> #148 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #149 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #150 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #151 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] 
> (self=0x7cb4fa90,     _cmd=0x286e5270) at NSThread.m:769
> #152 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] (
>     self=0x286e5080, _cmd=0x286e5438) at NSThread.m:846
> #153 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #154 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #155 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #156 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] 
> (self=0x7ccd9f10,     _cmd=0x286e5270) at NSThread.m:769
> #157 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] (
>     self=0x286e5080, _cmd=0x286e5438) at NSThread.m:846
> #158 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #159 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #160 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #161 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] 
> (self=0x7900df10,     _cmd=0x286e5270) at NSThread.m:769
> #162 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] (
>     self=0x286e5080, _cmd=0x286e5438) at NSThread.m:846
> #163 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #164 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #165 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #166 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] 
> (self=0x7b282010,     _cmd=0x286e5270) at NSThread.m:769
> #167 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] (
>     self=0x286e5080, _cmd=0x286e5438) at NSThread.m:846
> #168 0x08650424 in GSRegisterCurrentThread () at NSThread.m:2192
> #169 0x0864c3bd in GSCurrentThread () at NSThread.m:673
> #170 0x0864b7d4 in GSPrivateThreadID () at NSThread.m:142
> #171 0x0864c6e3 in -[NSThread(Activation) _makeThreadActive] 
> (self=0x7ccd9d90,     _cmd=0x286e5270) at NSThread.m:769
> #172 0x0864ca9d in +[NSThread _createThreadForCurrentPthread] (
>     self=0x286e5080, _cmd=0x286e5438) at NSThread.m:846
>
> <....>
>
>
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