[PATCH] D47605: Add weak definitions of trace-cmp hooks to dfsan

[Kostya Serebryany via Phabricator via llvm-commits]

kcc created this revision.
kcc added a reviewer: pcc.
Herald added subscribers: Sanitizers, delcypher.

This allows to build and link the code with e.g.
-fsanitize=dataflow -fsanitize-coverage=trace-pc-guard,pc-table,func,trace-cmp
w/o providing (all) the definitions of trace-cmp hooks.

This is similar to dummy hooks provided by asan/ubsan/msan for the same purpose,
except that some of the hooks need to have the __dfsw_ prefix
since we need dfsan to replace them.


Repository:
  rCRT Compiler Runtime

https://reviews.llvm.org/D47605

Files:
  lib/dfsan/dfsan_custom.cc
  lib/dfsan/scripts/check_custom_wrappers.sh
  test/dfsan/trace-cmp.c

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