AttributeError: /lib/x86_64-linux-gnu/libbcc.so.0: undefined symbol: bpf_module_create_b

[AkaCoder404]

Referring to this #4114, the solution is to use python3 instead of python (2.7), however I have followed the instructions and still getting an error, how do I solve this?

>>> import bcc
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3/dist-packages/bcc/__init__.py", line 26, in <module>
    from .libbcc import lib, bcc_symbol, bcc_symbol_option, bcc_stacktrace_build_id, _SYM_CB_TYPE
  File "/usr/lib/python3/dist-packages/bcc/libbcc.py", line 20, in <module>
    lib.bpf_module_create_b.restype = ct.c_void_p
  File "/usr/lib/python3.8/ctypes/__init__.py", line 386, in __getattr__
    func = self.__getitem__(name)
  File "/usr/lib/python3.8/ctypes/__init__.py", line 391, in __getitem__
    func = self._FuncPtr((name_or_ordinal, self))
AttributeError: /lib/x86_64-linux-gnu/libbcc.so.0: undefined symbol: bpf_module_create_b

I am running

$ python3 --version
Python 3.8.10

on machine

Linux XXX 5.15.0-69-generic #76~20.04.1-Ubuntu SMP Mon Mar 20 15:54:19 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux

I have compiled with LLVM_ROOT=/usr/lib/llvm-12.

[jfernandez]

I'm having the same error. Also using python3 and compiled from source using the Ubuntu instructions.

[AkaCoder404]

@jfernandez, I could not fix this error (I did not want to keep debugging so I used docker instead. I wrote a simple docker file and tried compiling from source in the docker file.

FROM ubuntu:20.04

RUN apt-get update

RUN apt-get install -y zip unzip

# Install recommended tools
RUN apt-get install -y arping netperf iperf3

# Install BCC dependencies for Ubuntu 20.04
RUN DEBIAN_FRONTEND=noninteractive \
  TZ=Asia/Singapore \ 
  apt-get install -y \
  bison build-essential cmake flex git libedit-dev \
  libllvm12 llvm-12-dev libclang-12-dev python zlib1g-dev libelf-dev libfl-dev python3-setuptools

# Install LuaJIT for BCC 
RUN apt-get -y install luajit luajit-5.1-dev

RUN apt-get -y install liblzma-dev

# Build BCC from source
RUN git clone https://github.com/iovisor/bcc.git
RUN mkdir bcc/build && cd bcc/build && \ 
      cmake .. && \
      make install && \
      cmake -DPYTHON_CMD=python3 .. && \ 
      cd src/python/ && \
      make && \
      make install && \
      cd ../..

# Kernel Headers
RUN apt-get install linux-headers-$(uname -r)


# Set working directory
WORKDIR /src

with a base image as ubuntu:20.04 but I think you can use your own preference. Then I built it with docker build --no-cache -t docker-ebpf:v1 . and ran it with

docker run --privileged \
    --name docker-ebpf \
    --net=host \
    -v /sys/kernel/debug:/sys/kernel/debug:rw \
    -v /lib/modules/:/lib/modules:ro \
    -v /etc/localtime:/etc/localtime:ro \
    -v /pathtosrcfiles:/src \ 
    -t -i docker-ebpf:v1 /bin/bash

This still does not solve the issue above, but I was able to successfully run the helloworld.py test case

[chenhengqi]

bpf_module_create_b is gone. Try build from source and reinstall.

[AkaCoder404]

@chenhengqi I have tried multiple times for installing from source, and always get stuck on this error. Perhaps is there a way to completely uninstall/reinstall process that I am missing?

[chenhengqi]

Can you remove the old libbcc.so manually ?

[AkaCoder404]

I have tried, does not solve the problem.

[jasneetsinghwahan]

@chenhengqi please help

$ sudo apt-get install bpfcc-tools linux-headers-$(uname -r) 
$ sudo apt-get update 
$ sudo apt-get install -y llvm clang 
$ sudo apt install -y zip bison build-essential cmake flex git libedit-dev \ 
  libllvm12 llvm-12-dev libclang-12-dev python zlib1g-dev libelf-dev libfl-dev python3-setuptools \ 
  liblzma-dev arping netperf iperf 
$ mkdir bcc/build; cd bcc/build 
$ sudo apt-get install libclang-10-dev 
$ cmake ..
changed /bcc/cmake/clang_libs.cmake and appended Polly and PollyISL
list(APPEND clang_libs 
${libclangParse} 
${libclangSema} 
${libclangCodeGen} 
${libclangAnalysis} 
${libclangRewrite} 
${libclangEdit} 
${libclangAST} 
${libclangLex} 
Polly 
PollyISL) 
$ make 
$ sudo make install 
$ cmake -DPYTHON_CMD=python3 .. # build python3 binding
$ pushd src/python/
$ make
$ sudo make install
$ popd
$ find /usr/lib -name bcc
$ sudo python3 hellow_world.py

Traceback (most recent call last):
  File "hello_world.py", line 9, in <module>
    from bcc import BPF
  File "/usr/lib/python3/dist-packages/bcc/__init__.py", line 26, in <module>
    from .libbcc import lib, bcc_symbol, bcc_symbol_option, bcc_stacktrace_build_id, _SYM_CB_TYPE
  File "/usr/lib/python3/dist-packages/bcc/libbcc.py", line 20, in <module>
    lib.bpf_module_create_b.restype = ct.c_void_p
  File "/usr/lib/python3.8/ctypes/__init__.py", line 386, in __getattr__
    func = self.__getitem__(name)
  File "/usr/lib/python3.8/ctypes/__init__.py", line 391, in __getitem__
    func = self._FuncPtr((name_or_ordinal, self))
AttributeError: /lib/x86_64-linux-gnu/libbcc.so.0: undefined symbol: bpf_module_create_b

[chenhengqi]

Probably, /usr/lib/python3/dist-packages/bcc is a leftover of a previous BCC installation. Can you remove it and install BCC again ?

[jasneetsinghwahan]

thanks, it worked

[AkaCoder404]

This works, thanks!

[ulugbek5609]

Worked for me as well. Thank you very much.

[pankul-zhang]

worked for me too thanks.

[coco21]

Worked for me too, thanks!

[0mobb0]

Probably, /usr/lib/python3/dist-packages/bcc is a leftover of a previous BCC installation. Can you remove it and install BCC again ?

Thanks!That worked for me as well

[shyhc]

Worked for me too, thanks!

[cassini-w]

Worked for me too, thanks!

[AgnesWickfield]

Probably, /usr/lib/python3/dist-packages/bcc is a leftover of a previous BCC installation. Can you remove it and install BCC again ?

Thanks, you've been a great help!