![]() ![]() Additionally, you can generate code recommendations for fixes and refactorings as well as ask questions about detections using an integrated LLM of your choice, such as OpenAI’s GPT models. Metabob analyzes all files of the project at once and automatically detects complex logical and contextual problems such as unhandled edge cases, memory leaks, and hundreds of other categories using its proprietary neural network. Metabob uses a graph-attention-based neural network to detect and classify problematic code and generates descriptions and code recommendations for the detected problems using an LLM of your choice. Supercharge your debugging with AI-powered code reviews! This extension allows you to analyze, debug, and refactor Python code. Static analysis takes only a few seconds to run, unfortunately it's only available in the more expensive versions of visual studio.Īn even better solution - don't run the risk, use _tcscpy_s rather than _tcscpy - it checks the buffer length without even requiring a single extra parameter in the example above.Metabob: Generative AI for debugging & refactoring Python code Suddenly things aren't looking quite so obviously wrong - now imagine the different lines that make up this bug are spread across more files - or even more projects. TCHAR* str = _T(“Here is a string that is too long.”) Our code could now look like this: //Ĝreate two buffers, one small, one large. ![]() So why is this important? Imagine we have the following four lines spread across four files: //ĝefined in Header1.h Stack allocated, in call to 'wcscpy': length '256'Ĭode analysis has shown us exactly the problem, even with the warning disabled. Here's what happens when we run it (Analyze > Run Code Analysis On Solution): 1>analysisexample.cpp(18): warning C6202:īuffer overrun for 'storageSmall', which is possibly If you haven't used it before, get used to running it on all of your projects. Visual Studio's Code Analysis tool is a life-saver. Generally the worst case is that nothing odd happens during testing, but then the code blows up on-site with the customer, typically on something business critical like a database server - something it's hard to debug on. In reality what happens is variables used subsequently in the function get overwritten unexpectedly. Then we copy the 34 characters into a smaller 13 character buffer - this causes a buffer overrun on the stack. In case you didn't see it, a string literal that is 34 characters long (68 bytes) is copied to a buffer 128 characters long. If there are thousands of warnings and they're masking other more important ones then you can see why maybe you'd consider disabling them. However, when you migrate a Visual Studio 2005 solution to 2008 or straight to 2010 then suddenly you'll get lots of warnings like this. The warning is telling us that wcscpy (which is what _tcscpy translates to in a Unicode build) is unsafe, which indeed it is as it does no buffer checking. analysisexample.cpp(15): warning C4996: 'wcscpy': Now in a sensible world with this warning enabled, we would get the following when compiling: analysisexample.cpp(14): warning C4996: 'wcscpy': TCHAR* str = _T("Here is a string that is too long.") TCHAR storageLarge // Get a pointer to a string literal. Ĝreate two buffers, one small, one large. The problem I came across is reduced to its most simple form below: // AnalysisExample.cpp : An example of how static analysis can help. Parts of the code base are very old - at some stage a decision was made to disable warning C4996. Today I was looking through some fairly old source code in a large solution, large in this case is ~300 projects and about 1 million lines of code.
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