David Malcolm of Red Hat has submitted a 49-part patch to GCC which gives GCC a static analysis feature:
This patch kit introduces a static analysis pass for GCC that can diagnose various kinds of problems in C code at compile-time (e.g. double-free, use-after-free, etc). The analyzer runs as an IPA pass on the gimple SSA representation. It associates state machines with data, with transitions at certain statements and edges. It finds “interesting” interprocedural paths through the user’s code, in which bogus state transitions happen.[…\
