[UBSan] Introduce "ubsan_standalone" library (Clang part).

Get rid of "libclang_rt.san" library that used to contain
sanitizer_common pieces required by UBSan if it's used in a standalone
mode. Instead, build two variants of UBSan runtime: "ubsan" and
"ubsan_standalone" (same for "ubsan_cxx" and "ubsan_standalone_cxx").

Later "ubsan" and "ubsan_cxx" libraries will go away, as they will
embedded it into corresponding ASan runtimes.

llvm-svn: 233010

1 files changed, 10 insertions, 7 deletions

diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp
index 410a939d9b5..72a7749310b 100644
--- a/clang/lib/Driver/Tools.cpp
+++ b/clang/lib/Driver/Tools.cpp
@@ -2283,13 +2283,16 @@ collectSanitizerRuntimes(const ToolChain &TC, const ArgList &Args,
     StaticRuntimes.push_back("tsan");
   // WARNING: UBSan should always go last.
   if (SanArgs.needsUbsanRt()) {
-    // If UBSan is not combined with another sanitizer, we need to pull in
-    // sanitizer_common explicitly.
-    if (StaticRuntimes.empty())
-      HelperStaticRuntimes.push_back("san");
-    StaticRuntimes.push_back("ubsan");
-    if (SanArgs.linkCXXRuntimes())
-      StaticRuntimes.push_back("ubsan_cxx");
+    // Check if UBSan is combined with another sanitizers.
+    if (StaticRuntimes.empty()) {
+      StaticRuntimes.push_back("ubsan_standalone");
+      if (SanArgs.linkCXXRuntimes())
+        StaticRuntimes.push_back("ubsan_standalone_cxx");
+    } else {
+      StaticRuntimes.push_back("ubsan");
+      if (SanArgs.linkCXXRuntimes())
+        StaticRuntimes.push_back("ubsan_cxx");
+    }
   }
 }