{"time": "2023-03-21T13:14:38.543680", "lm": "openai", "model": "gpt-4", "chat": true, "kwparams": {"temperature": 0, "top_p": 0}, "input": "I'm thinking of making a tool that can predict the expected behavior of a binary on a foreign architecture, and then allow the binary to run and verify whether it behaved as expected. I'd also like to track information flow inside the binary, so as to predict what regions of memory could be influenced by external input. What might such a tool be called? What library or libraries would be most useful in building it? Does it exist already?", "output": "Such a tool could be called a \"Cross-Architecture Binary Behavior Predictor and Analyzer\" or something similar. It would involve a combination of binary translation, emulation, and dynamic analysis techniques.\n\nThere are several libraries and tools that could be useful in building this tool:\n\n1. QEMU: A popular open-source processor emulator that supports various architectures. It can be used to emulate the foreign architecture and run the binary. QEMU also provides an API for dynamic binary translation, which can be used to translate the binary to the host architecture.\n\n2. LLVM: A collection of modular and reusable compiler and toolchain technologies. LLVM can be used to perform static and dynamic analysis on the binary, as well as to generate intermediate representations (IR) that can be used for further analysis and optimization.\n\n3. Capstone: A disassembly framework that supports multiple architectures. It can be used to disassemble the binary and analyze its instructions.\n\n4. Valgrind: An instrumentation framework for building dynamic analysis tools. Valgrind can be used to track memory usage and information flow within the binary.\n\n5. PIN: A dynamic binary instrumentation framework from Intel. It can be used to instrument the binary and analyze its behavior at runtime.\n\n6. Angr: A binary analysis framework that provides symbolic execution, taint analysis, and other advanced analysis techniques. Angr can be used to analyze the binary and predict its behavior.\n\nAs for existing tools, there are some that perform parts of what you're looking for, but not necessarily all in one package. For example, QEMU can emulate different architectures, and Angr can perform advanced binary analysis. However, a comprehensive tool that combines all these features and focuses specifically on predicting and verifying the behavior of binaries on foreign architectures might not exist yet. You could potentially build upon these existing tools and libraries to create your desired tool."}