[PATCH] Interceptors etc for standalone LSan.

[Alexander Potapenko]

================
Comment at: lib/lsan/lsan_interceptors.cc:46
@@ +45,3 @@
+  Init();
+  GET_STACK_TRACE(flags()->stack_trace_size, flags()->fast_unwind);
+  void *p = Allocate(stack, size, 8);
----------------
Looks like you're always calling GET_STACK_TRACE(flags()->stack_trace_size, flags()->fast_unwind). Can it be just GET_STACK_TRACE then?

================
Comment at: lib/lsan/lsan_interceptors.cc:59
@@ +58,3 @@
+  GET_STACK_TRACE(flags()->stack_trace_size, flags()->fast_unwind);
+  size *= nmemb;
+  void *p = Allocate(stack, size, 8, false);
----------------
Multiplication overflow here leads to a security vulnerability. Please use CallocShouldReturnNullDueToOverflow() from sanitizer_common.h


http://llvm-reviews.chandlerc.com/D702