Randomly generates FIRM graphs and applies libFirm optimizations to check if they break.
Inspired by CSmith and implemented by Jeff Wagner in his bachelor thesis.
Requires a C compiler and Make for building. Uses LLDB via Python for investigating crashes.
For Ubuntu 16.04 the following works:
sudo apt install build-essential liblldb-3.8 python-lldb-3.8
Unfortunately, the symlinks of the python-lldb-3.8 are broken.
See bug report.
Fixing it with more symlinks:
sudo ln -s ../../x86_64-linux-gnu/liblldb-3.8.so.1 /usr/lib/llvm-3.8/lib/liblldb.so
sudo ln -s ../../x86_64-linux-gnu /usr/lib/llvm-3.8/lib/x86_64-linux-gnu
make
This builds the firmsmith binary.
You can simply run it:
./run-fuzzer.py
Usually, you want to test a single optimization like -fthread-jumps.
In this case, run it like this:
./run-fuzzer.py --cparser-options="-fthread-jumps"
The fuzzer creates a lot of temporary files. For cleanup run:
bash clean
Copyright (c) 2017 Jeff Wagner
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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