Debug: Allow stepping into on a given call frame.

test/mjsunit/debug-step-4-in-frame.js

 // Copyright 2008 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
@@ skipping 11 matching lines @@
 // 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
 
-// Tests how debugger can step over not necessarily in the top frame.
+// Tests how debugger can step into/over not necessarily in the top frame.
 
 // Simple 3 functions, that protocol their execution state in global
 // variable state.
 var state;
 
+function e() {
+  for (state[3] = 0; state[3] < 5; state[3]++) {
+    void ("" + e + state[3]);
+  }
+}
 function f() {
   var a = 1978;
   for (state[2] = 0; state[2] < 5; state[2]++) {
     void String(a);
   }
 }
 function g() {
   for (state[1] = 0; state[1] < 5; state[1]++) {
-    f();
+    f() + e();
   }
 }
 function h() {
-  state = [-1, -1, -1];
+  state = [-1, -1, -1, -1];
   for (state[0] = 0; state[0] < 5; state[0]++) {
     g();
   }
 }
 
-function TestCase(frame_index, step_count, expected_final_state) {
-  print("Test case, parameters " + frame_index + "/" + step_count);
+function TestCase(frame_index, step_count, expected_final_state, action) {
+  action = action || Debug.StepAction.StepNext;
+  print("Test case, parameters " + frame_index + "/" + step_count +
+      ", action " + action);
 
   var listener_exception = null;
   var state_snapshot;
   var listener_state;
   var bp;
 
   function listener(event, exec_state, event_data, data) {
     print("Here ("+event+"/"+listener_state+"): " +
         exec_state.frame(0).sourceLineText());
     try {
       if (event == Debug.DebugEvent.Break) {
         if (listener_state == 0) {
           Debug.clearBreakPoint(bp);
           var context_frame;
           if (frame_index !== undefined) {
             context_frame = exec_state.frame(frame_index);
           }
-          exec_state.prepareStep(Debug.StepAction.StepNext,
-              step_count, context_frame);
+          exec_state.prepareStep(action, step_count, context_frame);
           listener_state = 1;
         } else if (listener_state == 1) {
           state_snapshot = String(state);
           print("State: " + state_snapshot);
           Debug.setListener(null);
           listener_state = 2;
         }
       }
     } catch (e) {
       listener_exception = e;
     }
   }
 
 
   // Add the debug event listener.
   listener_state = 0;
   Debug.setListener(listener);
   bp = Debug.setBreakPoint(f, 1);
 
   h();
   Debug.setListener(null);
   if (listener_exception !== null) {
     print("Exception caught: " + listener_exception);
     assertUnreachable();
   }
 
   assertEquals(expected_final_state, state_snapshot);
 }
 
+function TestCase2(frame_index, step_count, expected_final_state) {
+  return TestCase(frame_index, step_count, expected_final_state,
+      Debug.StepAction.StepIn);
+}
 
 // Warm-up -- make sure all is compiled and ready for breakpoint.
 h();
 
 
-// Stepping in the default (top) frame.
-TestCase(undefined, 0, "0,0,-1");
-TestCase(undefined, 1, "0,0,-1");
-TestCase(undefined, 2, "0,0,0");
-TestCase(undefined, 5, "0,0,1");
-TestCase(undefined, 8, "0,0,3");
+// Stepping over on the default (top) frame.
+TestCase(undefined, 0, "0,0,-1,-1");
+TestCase(undefined, 1, "0,0,-1,-1");
+TestCase(undefined, 2, "0,0,0,-1");
+TestCase(undefined, 5, "0,0,1,-1");
+TestCase(undefined, 8, "0,0,3,-1");
 
-// Stepping in the frame #0 (should be exactly the same as above).
-TestCase(0, 0, "0,0,-1");
-TestCase(0, 1, "0,0,-1");
-TestCase(0, 2, "0,0,0");
-TestCase(0, 5, "0,0,1");
-TestCase(0, 8, "0,0,3");
+// Stepping over on the frame #0 (should be exactly the same as above).
+TestCase(0, 0, "0,0,-1,-1");
+TestCase(0, 1, "0,0,-1,-1");
+TestCase(0, 2, "0,0,0,-1");
+TestCase(0, 5, "0,0,1,-1");
+TestCase(0, 8, "0,0,3,-1");
 
-// Stepping in the frame #1.
-TestCase(1, 0, "0,0,5");
-TestCase(1, 3, "0,1,5");
-TestCase(1, 8, "0,4,5");
+// Stepping over on the frame #1.
+TestCase(1, 0, "0,0,5,5");
+TestCase(1, 3, "0,1,5,5");
+TestCase(1, 8, "0,4,5,5");
 
-// Stepping in the frame #2.
-TestCase(2, 3, "1,5,5");
-TestCase(2, 8, "4,5,5");
+// Stepping over on the frame #2.
+TestCase(2, 3, "1,5,5,5");
+TestCase(2, 8, "4,5,5,5");
+
+// Stepping into on the default (top) frame.
+TestCase2(undefined, 0, "0,0,-1,-1");
+TestCase2(undefined, 1, "0,0,-1,-1");
+TestCase2(undefined, 2, "0,0,0,-1");
+TestCase2(undefined, 5, "0,0,1,-1");
+TestCase2(undefined, 8, "0,0,3,-1");
+
+// Stepping into on the frame #0 (should be exactly the same as above).
+TestCase2(0, 0, "0,0,-1,-1");
+TestCase2(0, 1, "0,0,-1,-1");
+TestCase2(0, 2, "0,0,0,-1");
+TestCase2(0, 5, "0,0,1,-1");
+TestCase2(0, 8, "0,0,3,-1");
+
+// Stepping into on the frame #1.
+TestCase2(1, 0, "0,0,5,-1");
+TestCase2(1, 3, "0,0,5,0");
+TestCase2(1, 8, "0,0,5,2");
+TestCase2(1, 9, "0,0,5,3");
+
+// Stepping into on the frame #2.
+TestCase2(2, 0, "0,5,5,5");
+TestCase2(2, 3, "1,5,5,5");
+TestCase2(2, 4, "1,0,5,5");
+TestCase2(2, 8, "1,0,0,5");
+TestCase2(2, 9, "1,0,1,5");