Never clear debug-stub call ICs. Make a clear distinction between is_debug_stub

test/mjsunit/regress/debug-prepare-step-in.js

Index: test/mjsunit/regress/debug-prepare-step-in.js
diff --git a/test/mjsunit/function-source.js b/test/mjsunit/regress/debug-prepare-step-in.js
similarity index 79%
copy from test/mjsunit/function-source.js
copy to test/mjsunit/regress/debug-prepare-step-in.js
index 8f2fc2265c364ed4d779057a96acc62518e306a2..b8c21164000bd9df01024fdfad6225c1bd217d3d 100644
--- a/test/mjsunit/function-source.js
+++ b/test/mjsunit/regress/debug-prepare-step-in.js
@@ -1,4 +1,4 @@
-// Copyright 2008 the V8 project authors. All rights reserved.
+// Copyright 2013 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:
@@ -25,25 +25,30 @@
 // (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
+// Flags: --expose-debug-as debug --allow-natives-syntax --expose-gc
 // Get the Debug object exposed from the debug context global object.
 Debug = debug.Debug
 
-// Check that the script source for all functions in a script is the same.
-function f() {
-  function h() {
-    assertEquals(Debug.scriptSource(f), Debug.scriptSource(h));
-  }
-  h();
+function breakListener(event, exec_state, event_data, data) {
+  exec_state.prepareStep(Debug.StepAction.StepIn, 1);
 }
 
+Debug.setListener(breakListener);
+
+var o = {x:function() { return 10; }};
+
+function f(o) {
+  var m = "x";
+  o[m]();
+}
+
+Debug.setBreakPoint(f, 2, 0);
+
+f(o);
+
+%NotifyContextDisposed();
 function g() {
-  function h() {
-    assertEquals(Debug.scriptSource(f), Debug.scriptSource(h));
-  }
-  h();
+  gc();
 }
 
-assertEquals(Debug.scriptSource(f), Debug.scriptSource(g));
-f();
 g();