libclang: audit all APIs that accept a CXTranslationUnit to make sure that

checks for invalid translation unit are in place.  Also, while there, add log
output for this case.

llvm-svn: 201155

1 files changed, 12 insertions, 0 deletions

diff --git a/clang/tools/libclang/CXTranslationUnit.h b/clang/tools/libclang/CXTranslationUnit.h
index 266c6fd96ac..c320bb19293 100644
--- a/clang/tools/libclang/CXTranslationUnit.h
+++ b/clang/tools/libclang/CXTranslationUnit.h
@@ -15,6 +15,7 @@
 #define LLVM_CLANG_CXTRANSLATIONUNIT_H
 
 #include "CXString.h"
+#include "CLog.h"
 #include "clang-c/Index.h"
 
 namespace clang {
@@ -45,6 +46,17 @@ static inline ASTUnit *getASTUnit(CXTranslationUnit TU) {
   return TU->TheASTUnit;
 }
 
+static inline bool isNotUseableTU(CXTranslationUnit TU) {
+  return !TU;
+}
+
+#define LOG_BAD_TU(TU)                                  \
+    do {                                                \
+      LOG_FUNC_SECTION {                                \
+        *Log << "called with a bad TU: " << TU;         \
+      }                                                 \
+    } while(false)
+
 class CXTUOwner {
   CXTranslationUnitImpl *TU;