Fix raise of several nested jumpable borders at one label.

Related issue: #164

JerryScript-DCO-1.0-Signed-off-by: Ruben Ayrapetyan r.ayrapetyan@samsung.com

jerry-core/parser/js/jsp-label.cpp

@@ -246,29 +246,47 @@ jsp_label_setup_continue_target (jsp_label_t *outermost_label_p, /**< the outerm
 } /* jsp_label_setup_continue_target */
 
 /**
- * Mark current label, if any, as nested jumpable border
+ * Add nested jumpable border at current label, if there is any.
+ *
+ * @return true - if the border is added (in the case, it should be removed
+ *                using jsp_label_remove_nested_jumpable_border, when parse of
+ *                the corresponding statement would be finished),
+ *         false - otherwise, new border is not raised, because there are no labels,
+ *                 or current label already contains a border.
  */
-void
+bool
 jsp_label_raise_nested_jumpable_border (void)
 {
-  if (label_set_p != NULL)
+  bool is_any_label = (label_set_p != NULL);
+
+  if (is_any_label)
   {
-    JERRY_ASSERT (!label_set_p->is_nested_jumpable_border);
-    label_set_p->is_nested_jumpable_border = true;
+    if (!label_set_p->is_nested_jumpable_border)
+    {
+      label_set_p->is_nested_jumpable_border = true;
+
+      return true;
+    }
+    else
+    {
+      return false;
+    }
+  }
+  else
+  {
+    return false;
   }
 } /* jsp_label_raise_nested_jumpable_border */
 
 /**
- * Unmark current label, if any, as nested jumpable border
+ * Remove nested jumpable border from current label
  */
 void
 jsp_label_remove_nested_jumpable_border (void)
 {
-  if (label_set_p != NULL)
-  {
-    JERRY_ASSERT (label_set_p->is_nested_jumpable_border);
-    label_set_p->is_nested_jumpable_border = false;
-  }
+  JERRY_ASSERT (label_set_p != NULL && label_set_p->is_nested_jumpable_border);
+
+  label_set_p->is_nested_jumpable_border = false;
 } /* jsp_label_remove_nested_jumpable_border */
 
 /**

jerry-core/parser/js/jsp-label.h

@@ -77,7 +77,7 @@ extern jsp_label_t *jsp_label_find (jsp_label_type_flag_t type_mask, token id, b
 extern void jsp_label_add_jump (jsp_label_t *label_p, bool is_simply_jumpable, bool is_break);
 extern void jsp_label_setup_continue_target (jsp_label_t *outermost_label_p, opcode_counter_t tgt_oc);
 
-extern void jsp_label_raise_nested_jumpable_border (void);
+extern bool jsp_label_raise_nested_jumpable_border (void);
 extern void jsp_label_remove_nested_jumpable_border (void);
 
 extern jsp_label_t *jsp_label_mask_set (void);

jerry-core/parser/js/parser.cpp

@@ -1985,7 +1985,7 @@ jsp_parse_for_in_statement (jsp_label_t *outermost_stmt_label_p, /**< outermost
                                                                   *   labels associated with the statement) */
                             locus for_body_statement_loc) /**< locus of loop body statement */
 {
-  jsp_label_raise_nested_jumpable_border ();
+  bool is_raised = jsp_label_raise_nested_jumpable_border ();
 
   current_token_must_be (TOK_OPEN_PAREN);
   skip_newlines ();
@@ -2068,7 +2068,10 @@ jsp_parse_for_in_statement (jsp_label_t *outermost_stmt_label_p, /**< outermost
     lexer_save_token (tok);
   }
 
-  jsp_label_remove_nested_jumpable_border ();
+  if (is_raised)
+  {
+    jsp_label_remove_nested_jumpable_border ();
+  }
 } /* jsp_parse_for_in_statement */
 
 /**
@@ -2255,7 +2258,7 @@ parse_with_statement (void)
   }
   const operand expr = parse_expression_inside_parens ();
 
-  jsp_label_raise_nested_jumpable_border ();
+  bool is_raised = jsp_label_raise_nested_jumpable_border ();
 
   opcode_counter_t with_begin_oc = dump_with_for_rewrite (expr);
   skip_newlines ();
@@ -2263,7 +2266,10 @@ parse_with_statement (void)
   rewrite_with (with_begin_oc);
   dump_with_end ();
 
-  jsp_label_remove_nested_jumpable_border ();
+  if (is_raised)
+  {
+    jsp_label_remove_nested_jumpable_border ();
+  }
 }
 
 static void
@@ -2433,7 +2439,7 @@ parse_try_statement (void)
 {
   assert_keyword (KW_TRY);
 
-  jsp_label_raise_nested_jumpable_border ();
+  bool is_raised = jsp_label_raise_nested_jumpable_border ();
 
   dump_try_for_rewrite ();
 
@@ -2470,7 +2476,10 @@ parse_try_statement (void)
 
   dump_end_try_catch_finally ();
 
-  jsp_label_remove_nested_jumpable_border ();
+  if (is_raised)
+  {
+    jsp_label_remove_nested_jumpable_border ();
+  }
 }
 
 static void

tests/jerry/regression-test-issue-164.js

@@ -0,0 +1,22 @@
+// Copyright 2015 Samsung Electronics Co., Ltd.
+// Copyright 2015 University of Szeged.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+var v_1 = { };
+
+for (i = 0; i < 1; i++) {
+  with ( v_1 ) {
+    with ( v_1 ) { }
+  }
+}