[libclang] Add some checks to make sure the given CXTranslationUnit is not null, before using it.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178800 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 7 insertions, 1 deletions

diff --git a/tools/libclang/CIndex.cpp b/tools/libclang/CIndex.cpp
index 59a7e8d112..a81f1e437d 100644
--- a/tools/libclang/CIndex.cpp
+++ b/tools/libclang/CIndex.cpp
@@ -2927,6 +2927,9 @@ CXString clang_getTranslationUnitSpelling(CXTranslationUnit CTUnit) {
 }
 
 CXCursor clang_getTranslationUnitCursor(CXTranslationUnit TU) {
+  if (!TU)
+    return clang_getNullCursor();
+
   ASTUnit *CXXUnit = cxtu::getASTUnit(TU);
   return MakeCXCursor(CXXUnit->getASTContext().getTranslationUnitDecl(), TU);
 }
@@ -4914,6 +4917,9 @@ void clang_tokenize(CXTranslationUnit TU, CXSourceRange Range,
   if (NumTokens)
     *NumTokens = 0;
 
+  if (!TU)
+    return;
+
   ASTUnit *CXXUnit = cxtu::getASTUnit(TU);
   if (!CXXUnit || !Tokens || !NumTokens)
     return;
@@ -5610,7 +5616,7 @@ extern "C" {
 void clang_annotateTokens(CXTranslationUnit TU,
                           CXToken *Tokens, unsigned NumTokens,
                           CXCursor *Cursors) {
-  if (NumTokens == 0 || !Tokens || !Cursors) {
+  if (!TU || NumTokens == 0 || !Tokens || !Cursors) {
     LOG_FUNC_SECTION { *Log << "<null input>"; }
     return;
   }