https://bugs.kde.org/show_bug.cgi?id=424298
Bug ID: 424298
Summary: valgrind 3.16.1: vex amd64->IR: unhandled instruction
bytes: 0xF 0xC7 0xF8 0x89 0x4 0x24 0xF 0x82 0x63 0x1
Product: valgrind
Version: unspecified
Platform: Ubuntu Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: vex
Assignee: jsew...@acm.org
Reporter: staffan...@gmail.com
Target Milestone: ---
Created attachment 130181
--> https://bugs.kde.org/attachment.cgi?id=130181&action=edit
The script build_dpdk.sh installs and builds DPDK 19.11
SUMMARY
When using valgrind 3.16.1 on an application using DPDK libraries, the
following run-time error is encountered:
vex amd64->IR: unhandled instruction bytes: 0xF 0xC7 0xF8 0x89 0x4 0x24 0xF
0x82 0x63 0x1
STEPS TO REPRODUCE
1. Install DPDK 19.11 and set the environment variable RTE_SDK to point to the
directory where DPDK 19.11 is installed. This can be accomplished by executing
the attached script build_dpdk.sh.
2. Untar the attached filed Test_Valgrind.tar
3. cd Test_Valgrind
4. make
5. valgrind ./mla_test
OBSERVED RESULT
epkswid@elx783742wq:~/Test_Valgrind$
~/Downloads/valgrind-3.16.1/bin/bin/valgrind ./mla_test
==23290== Memcheck, a memory error detector
==23290== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==23290== Using Valgrind-3.16.1 and LibVEX; rerun with -h for copyright info
==23290== Command: ./mla_test
==23290==
vex amd64->IR: unhandled instruction bytes: 0xF 0xC7 0xF8 0x89 0x4 0x24 0xF
0x82 0x63 0x1
vex amd64->IR: REX=0 REX.W=0 REX.R=0 REX.X=0 REX.B=0
vex amd64->IR: VEX=0 VEX.L=0 VEX.nVVVV=0x0 ESC=0F
vex amd64->IR: PFX.66=0 PFX.F2=0 PFX.F3=0
==23290== valgrind: Unrecognised instruction at address 0x10c254.
==23290== at 0x10C254: rte_rand_init (in
/home/epkswid/Test_Valgrind/mla_test)
==23290== by 0x13C0EC: __libc_csu_init (in
/home/epkswid/Test_Valgrind/mla_test)
==23290== by 0x548CB27: (below main) (libc-start.c:266)
EXPECTED RESULT
No unhandled instructions should occur when executing valgrind.
SOFTWARE/OS VERSIONS
Windows:
macOS:
Linux/KDE Plasma:
(available in About System)
KDE Plasma Version:
KDE Frameworks Version:
Qt Version:
ADDITIONAL INFORMATION
valgrind 3.16.1
epkswid@elx783742wq:~/Test_Valgrind$ uname -a
Linux elx783742wq 4.15.0-109-generic #110-Ubuntu SMP Tue Jun 23 02:39:32 UTC
2020 x86_64 x86_64 x86_64 GNU/Linux
epkswid@elx783742wq:~/Test_Valgrind$ cat /etc/*-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=18.04
DISTRIB_CODENAME=bionic
DISTRIB_DESCRIPTION="Ubuntu 18.04.4 LTS"
NAME="Ubuntu"
VERSION="18.04.4 LTS (Bionic Beaver)"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 18.04.4 LTS"
VERSION_ID="18.04"
HOME_URL="https://www.ubuntu.com/";
SUPPORT_URL="https://help.ubuntu.com/";
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/";
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy";
VERSION_CODENAME=bionic
UBUNTU_CODENAME=bionic
epkswid@elx783742wq:~/Test_Valgrind$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
7.5.0-3ubuntu1~18.04' --with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-7
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-libmpx --enable-plugin --enable-default-pie
--with-system-zlib --with-target-system-zlib --enable-objc-gc=auto
--enable-multiarch --disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 7.5.0 (Ubuntu 7.5.0-3ubuntu1~18.04)
epkswid@elx783742wq:~/Test_Valgrind$
When the executable file mla_test is executed without valgrind, the following
is printed:
epkswid@elx783742wq:~/Test_Valgrind$ ./mla_test
MEMPOOL: Cannot allocate tailq entry!
epkswid@elx783742wq:~/Test_Valgrind$
There is thus no crash although there is an error message printed.
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