zz
DISCONTINUED
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zz | angr | |
---|---|---|
10 | 13 | |
1,604 | 7,131 | |
- | 1.6% | |
1.9 | 9.7 | |
almost 2 years ago | 6 days ago | |
Rust | Python | |
MIT License | BSD 2-clause "Simplified" License |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
zz
- A "logical" compiler
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Is it possible to have a superset of the C programming languages standard that is as safe as Rust?
There is this: https://github.com/zetzit/zz
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ISO C became unusable for operating systems development
You're right that you can't define a safe subset of C without making it practical. MISRA C defines a C subset intended to help avoid C's footguns, but it still isn't actually a safe language. There are alternative approaches though:
1. Compile a safe language to C (whether a new language or an existing one)
2. Formal analysis of C, or of some practical subset of C, to prove the absence of undefined behaviour
Work has been done on both approaches.
ZZ compiles to C. [0] Dafny can compile to C++, but it seems that's not its primary target. [1][2]
There are several projects on formal analysis of C. [3][4][5][6]
[0] https://github.com/zetzit/zz
[1] https://github.com/dafny-lang/dafny
[2] https://dafny-lang.github.io/dafny/
[4] https://www.microsoft.com/en-us/research/project/vcc-a-verif...
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Foundations of Dawn: The Untyped Concatenative Calculus
Formal methods have been used successfully for decades; it's not just a pipe dream. Perfect software should ideally be something like ultra-low-defect software, though (that's the term the AdaCore folks use).
There are also other projects that aim to make formal software development much easier [0][1] and of course there's SPARK Ada.
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Programming in Z3 by learning to think like a compiler
This post reminds me that I've been wanting to try out ZetZ[0]. It incorporates Z3 into a high-level programming language, and seems to do a lot of what the post talks about automatically.
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Grids in Rust, part 2: const generics
I still want to try the ZZ language (https://github.com/zetzit/zz) someday. It compiles to C, and uses a SMT solver to prove that you don't index out-of-bounds at compile time. But I don't like how it lacks generics, uses C idioms, and compiles to C.
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We are building a new systems programming language
Especially the fact that it outputs C code. So interop is seamless.
For any systems language, interop with C is the litmus test.
With that in mind, this new language should not require 15,000 lines of standard library. A type-safe wrapper for libc should be enough...
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Does such a language already exist ("Rust--")?
You might find ZetZ interesting!
angr
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30 Years of Decompilation and the Unsolved Structuring Problem: Part 1
That's awesome! That's exactly how modern decompilers deal with a special type of goto occurrence. They reduce gotos (or completely eliminate them) by introducing a `while(true)` loop, followed by corresponding `continue` and `breaks`... we all, of course, know that `while(true)` did not exist in the source, but it's a nice hack!
We even do this in the angr decompiler, found here: https://github.com/angr/angr/blob/8e48d001e18a913ecd4ed2e995...
- Ask not what the compiler can do for you
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Any standard algorithms for parsing (disassembling) machine code?
BAP (https://github.com/binaryanalysisplatform/bap), angr (https://angr.io/) and others already do what you're asking for as more purpose-built solutions for dynamic analysis. Angr specifically in python.
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Can anyone explain to me how to find main function in elf file?
As /u/hkei noted, it's actually quite difficult to do in general, and usually requires some kind of heuristic. For example, see https://github.com/dyninst/dyninst/blob/v12.1.0/dyninstAPI/src/image.C#L476. Full disclosure, I am a Dyninst developer. There is also the python-based angr that might be more amenable to a one-off solution.
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Awesome Penetration Testing
angr - Platform-agnostic binary analysis framework.
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Programming in Z3 by learning to think like a compiler
angr uses z3.
Supposedly, the DoD has used angr for some use cases.
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Problem with angr
As per https://github.com/angr/angr/pull/2543#issuecomment-787550935 could you please provide the binary you are loading (if possible) and also the output of these commands:
I think it's probably a bug with the library, maybe due to some form of obfuscation in the binary, I opened a pull request with a band aid fix here: https://github.com/angr/angr/pull/2543.
What are some alternatives?
qiling - A True Instrumentable Binary Emulation Framework
pwntools - CTF framework and exploit development library
RustScan - π€ The Modern Port Scanner π€
frontier-silicon-firmwares - Frontier silicon internet radio firmware binaries
CrossHair - An analysis tool for Python that blurs the line between testing and type systems.
BinV - π Yet another binary vulnerbilities checker. An automated vulnerability scanner for ELF based on symbolic execution.
bap - Binary Analysis Platform
decompiler-explorer - Decompiler Explorer! Compare tools on the forefront of static analysis, now in your web browser!
checkedc - Checked C is an extension to C that lets programmers write C code that is guaranteed by the compiler to be type-safe. The goal is to let people easily make their existing C code type-safe and eliminate entire classes of errors. Checked C does not address use-after-free errors. This repo has a wiki for Checked C, sample code, the specification, and test code.
TinyGo - Go compiler for small places. Microcontrollers, WebAssembly (WASM/WASI), and command-line tools. Based on LLVM.
awesome-pcaptools - A collection of tools developed by other researchers in the Computer Science area to process network traces. All the right reserved for the original authors.
alive2 - Automatic verification of LLVM optimizations