[UBSan] Provide default blacklist filename for UBSan

Summary:
This is to provide a default blacklist filename for UBSan.

While UBSan is turned on, it's better that clang pick up a blacklist file (when exists), just as what ASan / MSan does, so we do not end up adding the "-fsanitize-blacklist" option to every command line.

Reviewers: chandlerc, echristo, vsk, eugenis

Reviewed By: vsk, eugenis

Subscribers: vsk, eugenis, echristo, cfe-commits

Differential Revision: https://reviews.llvm.org/D35849

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@309873 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Driver/SanitizerArgs.cpp b/lib/Driver/SanitizerArgs.cpp
index 2a3ae51734dcef7887c7ee233b4cd67f3fbec0d5..928cfb8e074803ed9bc7eb104f029394e435e8c4 100644 (file)
--- a/lib/Driver/SanitizerArgs.cpp
+++ b/lib/Driver/SanitizerArgs.cpp
@@ -101,6 +101,8 @@ static bool getDefaultBlacklist(const Driver &D, SanitizerMask Kinds,
     BlacklistFile = "dfsan_abilist.txt";
   else if (Kinds & CFI)
     BlacklistFile = "cfi_blacklist.txt";
+  else if (Kinds & Undefined)
+    BlacklistFile = "ubsan_blacklist.txt";
 
   if (BlacklistFile) {
     clang::SmallString<64> Path(D.ResourceDir);