Date: Tue, 22 Aug 2017 05:30:09 -0700 From: David Wolfskill <david@catwhisker.org> To: Ed Maste <emaste@freebsd.org> Cc: "current@freebsd.org" <current@freebsd.org> Subject: Re: SIGSEGV in /bin/sh after r322740 -> r322776 update Message-ID: <20170822123009.GI1130@albert.catwhisker.org> In-Reply-To: <CAPyFy2DLr-YPLv9%2BeSFnZx4Bzja_ih4iDV9eAwf2YHEw-d1Xqg@mail.gmail.com> References: <20170822114627.GC1130@albert.catwhisker.org> <CAPyFy2DLr-YPLv9%2BeSFnZx4Bzja_ih4iDV9eAwf2YHEw-d1Xqg@mail.gmail.com>
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On Tue, Aug 22, 2017 at 08:15:56AM -0400, Ed Maste wrote:
> On 22 August 2017 at 07:46, David Wolfskill <david@catwhisker.org> wrote:
> >
> > lldb's notion of the backtrace was fairly non-useful:
> > g1-252(11.1-S)[7] lldb -c sh.core
>=20
> Try:
> % lldb /bin/sh -c sh.core
freebeast(12.0-C)[12] lldb /bin/sh -c sh.core
(lldb) target create "/bin/sh" --core "sh.core"
Core file '/usr/obj/usr/src/sh.core' (x86_64) was loaded.
(ldb) bt
* thread #1, name =3D 'sh', stop reason =3D signal SIGSEGV
* frame #0: 0x0000000800b6ee08 libc.so.7`___lldb_unnamed_symbol899$$libc.=
so.7 + 72
frame #1: 0x0000000800b6eda1 libc.so.7`__malloc + 129
frame #2: 0x00000000004116cd sh`___lldb_unnamed_symbol142$$sh + 77
frame #3: 0x000000000041193f sh`___lldb_unnamed_symbol148$$sh + 111
frame #4: 0x0000000000407751 sh`___lldb_unnamed_symbol52$$sh + 129
frame #5: 0x00000000004074ef sh`___lldb_unnamed_symbol50$$sh + 63
frame #6: 0x000000000040fb50 sh`___lldb_unnamed_symbol119$$sh + 416
frame #7: 0x0000000000406892 sh`___lldb_unnamed_symbol38$$sh + 3266
frame #8: 0x00000000004054aa sh`___lldb_unnamed_symbol35$$sh + 714
frame #9: 0x0000000000405704 sh`___lldb_unnamed_symbol35$$sh + 1316
frame #10: 0x000000000040515b sh`___lldb_unnamed_symbol34$$sh + 171
frame #11: 0x00000000004111ae sh`___lldb_unnamed_symbol132$$sh + 558
frame #12: 0x0000000000402ecf sh`___lldb_unnamed_symbol1$$sh + 383
(lldb)=20
Well, that's more than we had before -- thanks!
Peace,
david
--=20
David H. Wolfskill david@catwhisker.org
If we wish to eliminate sources of Fake News, start at the top: D. Trump.
See http://www.catwhisker.org/~david/publickey.gpg for my public key.
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