[debugger] Further stepping support in test wrapper

test/mjsunit/debug-stepin-call-function-stub.js

-// Copyright 2009 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
-
-var exception = null;
-var state = 0;
-var expected_function_name = null;
-var expected_source_line_text = null;
-var expected_caller_source_line = null;
-var step_in_count = 2;
-
-// Simple debug event handler which first time will cause 'step in' action
-// to get into g.call and than check that execution is pauesed inside
-// function 'g'.
-function listener(event, exec_state, event_data, data) {
-  try {
-    if (event == Debug.DebugEvent.Break) {
-      if (state < step_in_count) {
-        // Step into f().
-        exec_state.prepareStep(Debug.StepAction.StepIn);
-        state++;
-      } else {
-        assertEquals(expected_source_line_text,
-                     event_data.sourceLineText());
-        assertEquals(expected_function_name, event_data.func().name());
-        state = 3;
-      }
-    }
-  } catch(e) {
-    exception = e;
-  }
-};
-
-// Add the debug event listener.
-Debug.setListener(listener);
-
-
-function g() {
-   return "s";  // expected line
-}
-
-function testFunction() {
-  var f = g;
-  var s = 1 +f(10);
-}
-
-function g2() {
-   return "s2";  // expected line
-}
-
-function testFunction2() {
-  var f = g2;
-  var s = 1 +f(10, 20);
-}
-
-// Run three times. First time the function will be compiled lazily,
-// second time cached version will be used.
-for (var i = 0; i < 3; i++) {
-  state = 0;
-  expected_function_name = 'g';
-  expected_source_line_text = '   return "s";  // expected line';
-  step_in_count = 2;
-  // Set a break point and call to invoke the debug event listener.
-  Debug.setBreakPoint(testFunction, 1, 0);
-  testFunction();
-  assertNull(exception);
-  assertEquals(3, state);
-}
-
-// Test stepping into function call when a breakpoint is set at the place
-// of call. Use different pair of functions so that g2 is compiled lazily.
-// Run twice: first time function will be compiled lazily, second time
-// cached version will be used.
-for (var i = 0; i < 3; i++) {
-  state = 0;
-  expected_function_name = 'g2';
-  expected_source_line_text = '   return "s2";  // expected line';
-  step_in_count = 1;
-  // Set a break point and call to invoke the debug event listener.
-  Debug.setBreakPoint(testFunction2, 2, 0);
-  testFunction2();
-  assertNull(exception);
-  assertEquals(3, state);
-}
-
-
-// Get rid of the debug event listener.
-Debug.setListener(null);