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, 6 insertions, 1 deletions

diff --git a/clang/tools/libclang/CIndexCodeCompletion.cpp b/clang/tools/libclang/CIndexCodeCompletion.cpp
index 04adb590498..0a978566f94 100644
--- a/clang/tools/libclang/CIndexCodeCompletion.cpp
+++ b/clang/tools/libclang/CIndexCodeCompletion.cpp
@@ -680,7 +680,12 @@ void clang_codeCompleteAt_Impl(void *UserData) {
 #endif
 
   bool EnableLogging = getenv("LIBCLANG_CODE_COMPLETION_LOGGING") != 0;
-  
+
+  if (cxtu::isNotUseableTU(TU)) {
+    LOG_BAD_TU(TU);
+    return;
+  }
+
   ASTUnit *AST = cxtu::getASTUnit(TU);
   if (!AST)
     return;