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contrib: Add deterministic-fuzz-coverage

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MarcoFalke
2024-12-13 09:24:31 +01:00
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contrib/devtools/README.md
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@@ -2,6 +2,26 @@ Contents
========
This directory contains tools for developers working on this repository.
deterministic-fuzz-coverage
===========================
A tool to check for non-determinism in fuzz coverage. To get the help, run:
```
RUST_BACKTRACE=1 cargo run --manifest-path ./contrib/devtools/deterministic-fuzz-coverage/Cargo.toml -- --help
```
To execute the tool, compilation has to be done with the build options
`-DCMAKE_C_COMPILER='clang' -DCMAKE_CXX_COMPILER='clang++'
-DBUILD_FOR_FUZZING=ON -DCMAKE_CXX_FLAGS='-fPIC -fprofile-instr-generate
-fcoverage-mapping'`. Both llvm-profdata and llvm-cov must be installed. Also,
the qa-assets repository must have been cloned. Finally, a fuzz target has to
be picked before running the tool:
```
RUST_BACKTRACE=1 cargo run --manifest-path ./contrib/devtools/deterministic-fuzz-coverage/Cargo.toml -- $PWD/build_dir $PWD/qa-assets/corpora-dir fuzz_target_name
```
clang-format-diff.py
===================