https://bugs.kde.org/show_bug.cgi?id=395246
Bug ID: 395246
Summary: vex amd64->IR: unhandled instruction bytes:
Product: valgrind
Version: 3.10.0
Platform: FreeBSD Ports
OS: FreeBSD
Status: UNCONFIRMED
Severity: major
Priority: NOR
Component: memcheck
Assignee: jsew...@acm.org
Reporter: joun...@yahoo.co.uk
Target Milestone: ---
Similar to: https://bugs.kde.org/show_bug.cgi?id=373166
With any utility program: /bin/date /bin/echo ... the following error. The
system is 64-bit Intel. I have tested vagrind in 32-bit machine (Intel) and
valgrind does not work there either. The bug was not in my code.
Version was (the 64-bit bug):
$ valgrind --version
valgrind-3.10.1
The systems were:
CURRENT:
$ uname -a # 64-bit (the error)
FreeBSD xxxxxxx 12.0-CURRENT FreeBSD 12.0-CURRENT #5 r333605: Wed May 16
13:10:26 EEST 2018
root@xxxxxxxx:/usr/obj/usr/src/amd64.amd64/sys/XXXXXX_64bit amd64
RELEASE:
$ uname -a # 32-bit (the latter error)
FreeBSD xxxxxxx 11.1-RELEASE-p9 FreeBSD 11.1-RELEASE-p9 #0: Tue Apr 3 16:51:52
UTC 2018
r...@amd64-builder.daemonology.net:/usr/obj/usr/src/sys/GENERIC i386
The systems are under development and the port may have changes to the
original.
The error looks like the following:
_______________________________________
64-bit:
$ valgrind /bin/date
==9140== Memcheck, a memory error detector
==9140== Copyright (C) 2002-2013, and GNU GPL'd, by Julian Seward et al.
==9140== Using Valgrind-3.10.1 and LibVEX; rerun with -h for copyright info
==9140== Command: /bin/date
==9140==
vex amd64->IR: unhandled instruction bytes: 0xC4 0xE2 0x4D 0x8E 0x10 0xC4 0xC1
0x45
vex amd64->IR: REX=0 REX.W=0 REX.R=0 REX.X=0 REX.B=0
vex amd64->IR: VEX=1 VEX.L=1 VEX.nVVVV=0x6 ESC=0F38
vex amd64->IR: PFX.66=1 PFX.F2=0 PFX.F3=0
==9140== valgrind: Unrecognised instruction at address 0x4d3c0ae.
==9140== at 0x4D3C0AE: ??? (in /lib/libc.so.7)
==9140== by 0x49249: ???
==9140== by 0x4D93AB3: ??? (in /lib/libc.so.7)
==9140== by 0x7FEFFF67F: ???
==9140== by 0x4D90191: ??? (in /lib/libc.so.7)
==9140== by 0x4D917FF: ??? (in /lib/libc.so.7)
==9140== by 0x4E3D7FF: ??? (in /lib/libc.so.7)
==9140== by 0x4828DEF: ???
==9140== by 0x4E321B1: ??? (in /lib/libc.so.7)
==9140== Your program just tried to execute an instruction that Valgrind
==9140== did not recognise. There are two possible reasons for this.
==9140== 1. Your program has a bug and erroneously jumped to a non-code
==9140== location. If you are running Memcheck and you just saw a
==9140== warning about a bad jump, it's probably your program's fault.
==9140== 2. The instruction is legitimate but Valgrind doesn't handle it,
==9140== i.e. it's Valgrind's fault. If you think this is the case or
==9140== you are not sure, please let us know and we'll try to fix it.
==9140== Either way, Valgrind will now raise a SIGILL signal which will
==9140== probably kill your program.
==9140==
==9140== Process terminating with default action of signal 4 (SIGILL): dumping
core
==9140== Illegal opcode at address 0x4D3C0AE
==9140== at 0x4D3C0AE: ??? (in /lib/libc.so.7)
==9140== by 0x49249: ???
==9140== by 0x4D93AB3: ??? (in /lib/libc.so.7)
==9140== by 0x7FEFFF67F: ???
==9140== by 0x4D90191: ??? (in /lib/libc.so.7)
==9140== by 0x4D917FF: ??? (in /lib/libc.so.7)
==9140== by 0x4E3D7FF: ??? (in /lib/libc.so.7)
==9140== by 0x4828DEF: ???
==9140== by 0x4E321B1: ??? (in /lib/libc.so.7)
==9140==
==9140== HEAP SUMMARY:
==9140== in use at exit: 0 bytes in 0 blocks
==9140== total heap usage: 0 allocs, 0 frees, 0 bytes allocated
==9140==
==9140== All heap blocks were freed -- no leaks are possible
==9140==
==9140== For counts of detected and suppressed errors, rerun with: -v
==9140== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 0 from 0)
Illegal instruction
_______________________________________
32-bit:
$ valgrind /bin/echo "1"
valgrind: I failed to allocate space for the application's stack.
valgrind: This may be the result of a very large --main-stacksize=
valgrind: setting. Cannot continue. Sorry.
$ valgrind /bin/date
valgrind: I failed to allocate space for the application's stack.
valgrind: This may be the result of a very large --main-stacksize=
valgrind: setting. Cannot continue. Sorry.
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