* Tim Schumacher: > Specifically, I was curious about what meta data is stored about the > allocations (size/# of elements in the array case), and where that > data is stored. Certain types require a "cookie" which stores the length, and it is stored just before the pointer that operator new[] returns. The rules for when a cookie is needed are somewhat complex and depend on the ABI version. The layout of the cookie field is ABI-dependent as well (beyond mere differences in word size). Searching for "cookie" in gcc/cp/*.c should point you into the right direction. operator new[] is expanded in-line by the compiler, so most of the run-time library support routines Jonathan mentioned are not actually used by GCC, but are provided for use by other compilers.
