- /* We potentially keep two different kinds of back */
- /* pointers. KEEP_BACK_PTRS stores a single back */
- /* pointer in each reachable object to allow reporting */
- /* of why an object was retained. MAKE_BACK_GRAPH */
- /* builds a graph containing the inverse of all */
- /* "points-to" edges including those involving */
- /* objects that have just become unreachable. This */
- /* allows detection of growing chains of unreachable */
- /* objects. It may be possible to eventually combine */
- /* both, but for now we keep them separate. Both */
- /* kinds of back pointers are hidden using the */
- /* following macros. In both cases, the plain version */
- /* is constrained to have an least significant bit of 1,*/
- /* to allow it to be distinguished from a free list */
- /* link. This means the plain version must have an */
- /* lsb of 0. */
- /* Note that blocks dropped by black-listing will */
- /* also have the lsb clear once debugging has */
- /* started. */
- /* We're careful never to overwrite a value with lsb 0. */
+ /* We potentially keep two different kinds of back */
+ /* pointers. KEEP_BACK_PTRS stores a single back */
+ /* pointer in each reachable object to allow reporting */
+ /* of why an object was retained. MAKE_BACK_GRAPH */
+ /* builds a graph containing the inverse of all */
+ /* "points-to" edges including those involving */
+ /* objects that have just become unreachable. This */
+ /* allows detection of growing chains of unreachable */
+ /* objects. It may be possible to eventually combine */
+ /* both, but for now we keep them separate. Both */
+ /* kinds of back pointers are hidden using the */
+ /* following macros. In both cases, the plain version */
+ /* is constrained to have an least significant bit of 1,*/
+ /* to allow it to be distinguished from a free list */
+ /* link. This means the plain version must have an */
+ /* lsb of 0. */
+ /* Note that blocks dropped by black-listing will */
+ /* also have the lsb clear once debugging has */
+ /* started. */
+ /* We're careful never to overwrite a value with lsb 0. */