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llvm-svn: 112836

llvm/include/llvm/System/Path.h

@@ -164,6 +164,7 @@ namespace sys {
 
       /// GetMainExecutable - Return the path to the main executable, given the
       /// value of argv[0] from program startup and the address of main itself.
+      /// In extremis, this function may fail and return an empty path.
       static Path GetMainExecutable(const char *argv0, void *MainAddr);
 
       /// This is one of the very few ways in which a path can be constructed