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

[Peter Collingbourne]

Hi kcc,

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

Files:
  lib/CodeGen/BackendUtil.cpp
  lib/Driver/SanitizerArgs.cpp

Index: lib/CodeGen/BackendUtil.cpp
===================================================================
--- lib/CodeGen/BackendUtil.cpp
+++ lib/CodeGen/BackendUtil.cpp
@@ -208,7 +208,10 @@
 
 static void addDataFlowSanitizerPass(const PassManagerBuilder &Builder,
                                      PassManagerBase &PM) {
-  PM.add(createDataFlowSanitizerPass());
+  const PassManagerBuilderWrapper &BuilderWrapper =
+      static_cast<const PassManagerBuilderWrapper&>(Builder);
+  const CodeGenOptions &CGOpts = BuilderWrapper.getCGOpts();
+  PM.add(createDataFlowSanitizerPass(CGOpts.SanitizerBlacklistFile));
 }
 
 void EmitAssemblyHelper::CreatePasses(TargetMachine *TM) {
Index: lib/Driver/SanitizerArgs.cpp
===================================================================
--- lib/Driver/SanitizerArgs.cpp
+++ lib/Driver/SanitizerArgs.cpp
@@ -295,6 +295,9 @@
     BlacklistFile = "msan_blacklist.txt";
   else if (Kind & NeedsTsanRt)
     BlacklistFile = "tsan_blacklist.txt";
+  else if (Kind & NeedsDfsanRt)
+    BlacklistFile = "dfsan_abilist.txt";
+
   if (BlacklistFile) {
     SmallString<64> Path(D.ResourceDir);
     llvm::sys::path::append(Path, BlacklistFile);
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