Runtime Bounds Checking

Runtime bounds checking is a programming technique that verifies whether array or buffer accesses are within defined boundaries during program execution. It prevents memory corruption errors like buffer overflows and out-of-bounds accesses by validating indices or pointers at runtime. This is a critical security and reliability feature commonly implemented in memory-safe languages and tools.

Also known as: Bounds Checking, Array Bounds Checking, Buffer Bounds Checking, Out-of-Bounds Detection, Memory Bounds Verification

Why learn Runtime Bounds Checking?

Developers should use runtime bounds checking when building applications in languages without inherent memory safety (e.g., C, C++) or when handling untrusted input to prevent vulnerabilities like buffer overflows, which can lead to crashes or security exploits. It's essential in safety-critical systems, such as embedded devices or financial software, where memory errors could cause catastrophic failures or data breaches.

Learning Resources

• docs: OWASP Buffer Overflow Prevention Cheat Sheet
• docs: Microsoft Docs: /GS (Buffer Security Check)
• docs: C++ Core Guidelines: Bounds Safety
• video: YouTube: Buffer Overflows Explained
• course: Stanford CS107: Memory and Pointers