[PATCH] Add "Hard Mode" sanitizers

[Kostya Serebryany]

  1. please provide a rationale
  2. please explain why the existing DieCallback is not enough
  3. If #1 and #2 are good, please provide a test.


================
Comment at: lib/sanitizer_common/sanitizer_common.cc:20
@@ -19,1 +19,3 @@
 
+#include <stdlib.h>
+
----------------
we do not allow system header files here, nor an any other non-platform dependent .cc files. 


http://llvm-reviews.chandlerc.com/D3251