Implement --redzone-size and --core-redzone-size

* For tools replacing the malloc library (e.g. Memcheck, Helgrind, ...),
  the option --redzone-size=<number> allows to control the padding 
  blocks (redzones) added before and after each client allocated block.
  Smaller redzones decrease the memory needed by Valgrind. Bigger
  redzones increase the chance to detect blocks overrun or underrun.



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12807 a5019735-40e9-0310-863c-91ae7b9d1cf9
21 files changed