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Writing Bounds-Safe Code in C with Arrays

https://uecker.codeberg.page/2025-07-09.html

by uecker • 1 year ago

21 3 1 year ago

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rramadass• 1 year ago

Good, succinct and to-the-point article.

References:

GCC: https://gcc.gnu.org/onlinedocs/gcc-6.3.0/gcc/Instrumentation...

Clang: https://clang.llvm.org/docs/UndefinedBehaviorSanitizer.html

kilpikaarna• 1 year ago

Rare to see VLAs described as "one of the coolest features of C".

uecker• 1 year ago

Note that this is about pointers to variably length arrays, and not a VLA on the stack. But both are cool features. Bounds checking would be further ahead, if VLAs did not get a bad reputation from poor compilers that did not do stack probing.

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