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When a C++ program crashes or corrupts data at random points, a dangling pointer or use‑after‑free is often the culprit. This guide walks through symptoms, root causes, systematic checks, and concrete fixes using smart pointers and ASan.
I am designing a host-side pipeline that maps an OpenCL buffer for writing while previously enqueued kernels may still be running. The specification describes CL_MAP_WRITE_INVALIDATE_REGION as a hint that the entire mapped region will be overwritten, so the implementation may discard prior contents instead of fetching them. What I cannot pin down is the inte
This question examines how signed integer overflow, classified as undefined behavior in the C standard, may influence the correctness of data recovery verification for compiled artifacts. The goal is to determine whether compiler-generated overflow assumptions can produce divergent recovery outcomes across target platforms. The C standard does not mandate tw
In C (ISO/IEC 9899), pointer arithmetic is permitted within the bounds of an array, including one element past the end. However, dereferencing a pointer that has moved beyond this boundary triggers Undefined Behavior (UB). A specific concern arises when compiler optimizations (such as -O2 or -O3 ) are applied. Because the compiler assumes UB never occurs, it
The C standard defines signed integer overflow as undefined behavior (UB), which allows modern compilers to optimize code by assuming such overflows never occur. This creates a challenge when designing systems that require predictable wrapping behavior for signed types. While unsigned integers are guaranteed to wrap according to the laws of modulo arithmetic
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