Memory safety is a concern in software development that aims to avoid software bugs that cause security vulnerabilities dealing with random-access memory (RAM) access, such as buffer overflows and dangling pointers.
Computer languages such as C and C++ that support arbitrary pointer arithmetic, casting, and deallocation are typically not memory safe. There are several different approaches to find errors in such languages: see the Detection section below.
The Cyclone language uses a hybrid approach, including "fat pointers" (pointers that carry their metadata directly) and regions to give programmers some low-level control while still ensuring memory safety.
Most high-level programming languages avoid the problem by disallowing pointer arithmetic and casting entirely, and by enforcing tracing garbage collection as the sole memory management scheme.
A language could support even more uses of pointer arithmetic, casting, and deallocation without sacrificing memory safety by using automated theorem proving as a form of static code analysis. ESC/Java and D demonstrate two ways that programmers can declare their invariants in ways that can be understood by a theorem prover.
Read more about Memory Safety: Types of Memory Errors, Detection
Famous quotes containing the words memory and/or safety:
“A man’s memory is bound to be a distortion of his past in accordance with his present interests, and the most faithful autobiography is likely to mirror less what a man was than what he has become.”
—Fawn M. Brodie (1915–1981)
“To emancipate [the slaves] entirely throughout the Union cannot, I conceive, be thought of, consistently with the safety of the country.”
—Frances Trollope (1780–1863)