[PATCH] Add support for -fsanitize-blacklist and default blacklists for DFSan

[Peter Collingbourne]

  > The code is fine, feel free to commit it now if it blocks you.

  This patch accompanies D1345; once I get an LGTM there I'll be able to commit this.

  > But the design may deserve more discussion; would you like to do it here?

  OK, let's do it here.

  > My first question: what happens if a pointer to a libc function is taken?

  I have updated the design document in this patch to address this aspect of the design.

http://llvm-reviews.chandlerc.com/D1346