[GR-16720] [GH-78] Give full path for code objects.

PullRequest: graalpython/566

Author: fangerer

graalpython/com.oracle.graal.python/src/com/oracle/graal/python/builtins/objects/code/PCode.java

@@ -169,7 +169,10 @@ private static String extractFileName(RootNode rootNode) {
         RootNode funcRootNode = (rootNode instanceof GeneratorFunctionRootNode) ? ((GeneratorFunctionRootNode) rootNode).getFunctionRootNode() : rootNode;
         SourceSection src = funcRootNode.getSourceSection();
         if (src != null) {
-            return src.getSource().getName();
+            if (src.getSource().getPath() == null) {
+                return src.getSource().getName();
+            }
+            return src.getSource().getPath();
         } else if (funcRootNode instanceof ModuleRootNode) {
             return funcRootNode.getName();
         } else {