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Documentation Testing Notes

This branch contains fixes found during documentation testing per the issue: "按照doc和readme之类的测试一下能不能正常运行，文档有没有不准确的地方，有没有其他 bug？"

Critical Fix Required

The llvm-jit submodule needs to be updated separately to support LLVM 16-20.

Changes needed in vm/llvm-jit submodule:

File: src/llvm_jit_context.cpp line ~453

Update the candidates list:

const char *candidates[] = {
    envSoname && envSoname[0] ? envSoname : (const char *)nullptr,
    "libLLVM.so",
    "libLLVM-20.so",
    "libLLVM-19.so",
    "libLLVM-18.so",
    "libLLVM-17.so",
    "libLLVM-16.so",
    "libLLVM-17.0.6.so",
};

Build requirement:

Enable LLVM preload flag:

-DBPFTIME_ENABLE_LLVM_PRELOAD=ON

Documentation Fixes Applied

  • README.md: Fixed example output (removed "Hello malloc!")
  • usage.md: Fixed example output (removed "Hello malloc!")

Test Results

All installation and usage instructions verified working on Ubuntu 24.04 with LLVM 18.

See /tmp/bpftime-testing-summary.md for full report.