Re: [dpdk-dev] [Bug 811] BPF tests fail with clang

[Stephen Hemminger <stephen@networkplumber.org>]

Any progress on this issue?
Perhaps we should just disable BPF with clang build?


On Thu, 16 Sep 2021 03:07:41 +0000
bugzilla@dpdk.org wrote:

> https://bugs.dpdk.org/show_bug.cgi?id=811
> 
>             Bug ID: 811
>            Summary: BPF tests fail with clang
>            Product: DPDK
>            Version: 21.11
>           Hardware: All
>                 OS: All
>             Status: UNCONFIRMED
>           Severity: normal
>           Priority: Normal
>          Component: other
>           Assignee: dev@dpdk.org
>           Reporter: stephen@networkplumber.org
>   Target Milestone: ---
> 
> The bpf_autotest fails when DPDK 21.11 is built with clang.
> Same test and code work when built with Gcc.
> 
>  $ clang --version
> Debian clang version 11.0.1-2
> Target: x86_64-pc-linux-gnu
> Thread model: posix
> InstalledDir: /usr/bin
> 
> $ gcc --version
> gcc (Debian 10.2.1-6) 10.2.1 20210110
> Copyright (C) 2020 Free Software Foundation, Inc.
> This is free software; see the source for copying conditions.  There is NO
> warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
> 
> 
>  $ DPDK_TEST='bpf_autotest'
> /home/shemminger/DPDK/pcapng2/build/app/test/dpdk-test -l 0-15 --no-huge -m
> 2048
> EAL: Detected 16 lcore(s)
> EAL: Detected 1 NUMA nodes
> EAL: Detected static linkage of DPDK
> EAL: Multi-process socket /run/user/1000/dpdk/rte/mp_socket
> EAL: Selected IOVA mode 'VA'
> APP: HPET is not enabled, using TSC as default timer
> RTE>>bpf_autotest  
> run_test(test_store1) start
> run_test(test_store2) start
> run_test(test_load1) start
> run_test(test_ldimm1) start
> run_test(test_mul1) start
> run_test(test_shift1) start
> test_shift1_check: invalid value
> expected:
> 00:80:21:81:00:00:00:00:00:00:00:00:00:00:00:00:ff:db:dd:ed:ff:ff:ff:ff:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:ff:00:00:00:00:00:00:00:00:c0:ed:27:21:00:00:00:00:00:00:00:00:00:00:00:00:81:ef:ad:f6:ff:76:77:fb:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00
> result:
> 00:80:21:81:00:00:00:00:00:00:00:00:00:00:00:00:ff:db:dd:ed:ff:ff:ff:ff:00:00:00:00:00:00:00:00:81:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:ff:00:00:00:00:00:00:00:00:c0:ed:27:21:00:00:00:00:00:00:00:00:00:00:00:00:81:ef:ad:f6:ff:76:77:fb:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00
> run_test@3196: check_result(test_shift1) failed, error: -1(Unknown error -1);
> test_shift1_check: invalid value
> expected:
> 00:00:cf:4e:00:00:00:00:00:00:00:00:00:00:00:00:cf:bb:75:ef:ff:ff:ff:ff:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:80:e7:dd:ba:00:00:00:00:00:00:00:00:00:00:00:c0:00:00:00:00:00:00:00:00:00:00:00:00:7b:de:ad:7b:ff:ff:ff:ff:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00
> result:
> 00:00:cf:4e:00:00:00:00:00:00:00:00:00:00:00:00:cf:bb:75:ef:ff:ff:ff:ff:00:00:00:00:00:00:00:00:00:9e:9d:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:80:e7:dd:ba:00:00:00:00:00:00:00:00:00:00:00:c0:00:00:00:00:00:00:00:00:00:00:00:00:7b:de:ad:7b:ff:ff:ff:ff:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00
> run_test@3210: check_result(test_shift1) failed, error: -1(Unknown error -1);
> run_test(test_jump1) start
> run_test(test_jump2) start
> run_test(test_alu1) start
> run_test(test_bele1) start
> run_test(test_xadd1) start
> run_test(test_div1) start
> bpf_exec(0x7f3a1d03d000): division by 0 at pc: 0x68;
> run_test(test_call1) start
> run_test(test_call2) start
> run_test(test_call3) start
> run_test(test_call4) start
> run_test(test_call5) start
> run_test(test_ld_mbuf1) start
> run_test(test_ld_mbuf2) start
> run_test(test_ld_mbuf3) start
> Test Failed
> RTE>>  
>