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From: "werner at suse dot de" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug string/29327] A SIGSEGV in hardware optimized memset for sse2
 __memset_sse2_unaligned_erms()
Date: Tue, 12 Jul 2022 07:02:42 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D29327

--- Comment #16 from Dr. Werner Fink <werner at suse dot de> ---
Created attachment 14205
  --> https://sourceware.org/bugzilla/attachment.cgi?id=3D14205&action=3Ded=
it
audit.log

(In reply to H.J. Lu from comment #15)
> Created attachment 14202 [details]
> LD_AUDIT example
>=20
> Here is an example for LD_AUDIT:
>=20
> [hjl@gnu-cfl-1 audit-memset]$ make
> LD_AUDIT=3D./auditmod.so ./foo
> version: 2
> memset: dst=3D0x601060, src=3D0x3, len=3D33
> pltenter: memset: dst=3D0x601060, src=3D3, len=3D33
> [hjl@gnu-cfl-1 audit-memset]$=20
>=20
> We need arguments of the last memset call.

Lets try

 /kodi> ( setenv LD_AUDIT ./auditmod.so ; ./foo )
 version: 2
 memset: dst=3D0x404060, src=3D0x3, len=3D33
 pltenter: memset: dst=3D0x404060, src=3D3, len=3D33

yep

  /kodi> ( setenv LD_AUDIT ./auditmod.so ; setenv LD_PRELOAD
/lib64/libmemusage.so ; setenv MEMUSAGE_OUTPUT /dev/null ; setenv
MEMUSAGE_TRACE_MMAP yes ; /usr/lib64/kodi/kodi.bin )
 version: 2
 Segmentation fault (core dumped)

libmemusage does not allow ... then without

  /kodi> ( setenv LD_AUDIT ./auditmod.so ; /usr/lib64/kodi/kodi.bin ) | & t=
ee
audit.log

... that is a longer list, see attachment

--=20
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