8271461: CompileCommand support for hidden class methods

Co-authored-by: Tianyelan <vhinf2047@gmail.com>
Reviewed-by: yyang, xliu, iklam

src/hotspot/share/compiler/methodMatcher.cpp

@@ -115,7 +115,7 @@ bool MethodMatcher::canonicalize(char * line, const char *& error_msg) {
         }
 
         if (*lp == '/') {
-          error_msg = "Method pattern uses '/' together with '::'";
+          error_msg = "Method pattern uses '/' together with '::' (tips: replace '/' with '+' for hidden classes)";
           return false;
         }
       }