Fix issue 825 (LiveEdit vs. function with no locals) in core and for ia32.

test/mjsunit/debug-liveedit-stack-padding.js

Index: test/mjsunit/debug-liveedit-stack-padding.js
diff --git a/test/mjsunit/debug-liveedit-stack-padding.js b/test/mjsunit/debug-liveedit-stack-padding.js
new file mode 100644
index 0000000000000000000000000000000000000000..36de3569739be85dee476962cb21d467bfc0aaca
--- /dev/null
+++ b/test/mjsunit/debug-liveedit-stack-padding.js
@@ -0,0 +1,88 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --expose-debug-as debug
+// Get the Debug object exposed from the debug context global object.
+
+Debug = debug.Debug;
+
+SlimFunction = eval(
+    "(function() {\n " +
+    "  return 'Cat';\n" +
+    "})\n"
+);
+
+var script = Debug.findScript(SlimFunction);
+
+Debug.setScriptBreakPointById(script.id, 1, 0);
+
+var orig_animal = "'Cat'";
+var patch_pos = script.source.indexOf(orig_animal);
+var new_animal_patch = "'Capybara'";
+
+debugger_handler = (function() {
+  var already_called = false;
+  return function() {
+    if (already_called) {
+      return;
+    }
+    already_called = true;
+
+    var change_log = new Array();
+    try {
+      Debug.LiveEdit.TestApi.ApplySingleChunkPatch(script, patch_pos,
+          orig_animal.length, new_animal_patch, change_log);
+    } finally {
+      print("Change log: " + JSON.stringify(change_log) + "\n");
+    }
+  };
+})();
+
+var saved_exception = null;
+
+function listener(event, exec_state, event_data, data) {
+  if (event == Debug.DebugEvent.Break) {
+    try {
+      debugger_handler();
+    } catch (e) {
+      saved_exception = e;
+    }
+  } else {
+    print("Other: " + event);
+  }
+}
+
+Debug.setListener(listener);
+
+var animal = SlimFunction();
+
+if (saved_exception) {
+  print("Exception: " + saved_exception);
+  assertUnreachable();
+}
+
+assertEquals("Capybara", animal);