Debug: parameterize 'step over' action with a frame where the step must be performed

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
+//       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
+
+// Tests how debugger can step over not necessarily in the top frame.
+
+// Simple 3 functions, that protocol their execution state in global
+// variable state.
+var state;
+
+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();
+  }
+}
+function h() {
+  state = [-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);
+
+  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);
+          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);
+}
+
+
+// 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 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 in the frame #1.
+TestCase(1, 0, "0,0,5");
+TestCase(1, 3, "0,1,5");
+TestCase(1, 8, "0,4,5");
+
+// Stepping in the frame #2.
+TestCase(2, 3, "1,5,5");
+TestCase(2, 8, "4,5,5");