Skip to content

Latest commit

 

History

History
50 lines (44 loc) · 2.33 KB

AFL.md

File metadata and controls

50 lines (44 loc) · 2.33 KB
Raw

1. Project structure

I keep the same structure of origin project and added some folders:

  • libfuzzer: fuzzer functions
  • testfuzzer: writing unit tests for libfuzzer
  • fuzzer: build executable fuzzer

2. How to build current project

cd YOUR_PROJECT_FOLDER/
mkdir build 
cd build
cmake .. # common editors
cmake -G Xcode .. # create Xcode's project structure

3. How to interact with c++ EVM

The source code is not stable yet, but you can do like this:

#include <libfuzzer/TargetProgram.h>
#include <libfuzzer/Abi.h>

int main() {
  string codeStr = "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";
  OnOpFunc onOp = [](uint64_t, uint64_t, Instruction, bigint, bigint, bigint, VMFace const*, ExtVMFace const*) {
    /*
    * TODO: Write your code to catch opcode
    */
  };
  TargetProgram p;
  p.deploy(fromHex(codeStr));
  bytes constructorData = fromHex("ENCODED ABI");
  bytes functionData = fromHex("ENCODED ABI");
  /* Call contract constructor */
  p.invoke(CONTRACT_CONSTRUCTOR, constructorData, onOp);
  /* Call contract function */
  p.invoke(CONTRACT_FUNCTION, functionData, onOp);
  return 1;
}

or you can take a look at this file main.cpp to see offcial example of etheremum c++.

4. Suggestions

  • You can create new library and executable target for your project like: libasan(library) and asan (library)
  • If you are familar with CMake then it is easy to add new target otherwise CMake or copy my CMakelist.txt file and edit.

5. IDE

There are two great editors which support CMake by nature.