debug-scopes.js 38 KB
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// Copyright 2011 the V8 project authors. All rights reserved.
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// 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.

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// Flags: --noanalyze-environment-liveness
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// The functions used for testing backtraces. They are at the top to make the
// testing of source line/column easier.

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var Debug = debug.Debug;
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var test_name;
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var listener_delegate;
var listener_called;
var exception;
var begin_test_count = 0;
var end_test_count = 0;
var break_count = 0;
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var global_marker = 7;
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// Debug event listener which delegates.
function listener(event, exec_state, event_data, data) {
  try {
    if (event == Debug.DebugEvent.Break) {
      break_count++;
      listener_called = true;
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      listener_delegate(exec_state);
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    }
  } catch (e) {
    exception = e;
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    print(e, e.stack);
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  }
}

// Add the debug event listener.
Debug.setListener(listener);


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// Initialize for a new test.
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function BeginTest(name) {
  test_name = name;
  listener_delegate = null;
  listener_called = false;
  exception = null;
  begin_test_count++;
}


// Check result of a test.
function EndTest() {
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  assertTrue(listener_called, "listener not called for " + test_name);
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  assertNull(exception, test_name + " / " + exception);
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  end_test_count++;
}


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// Check that two scope are the same.
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function assertScopeMirrorEquals(scope1, scope2) {
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  assertEquals(scope1.scopeType(), scope2.scopeType());
  assertEquals(scope1.frameIndex(), scope2.frameIndex());
  assertEquals(scope1.scopeIndex(), scope2.scopeIndex());
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  assertPropertiesEqual(scope1.scopeObject().value(), scope2.scopeObject().value());
}

function CheckFastAllScopes(scopes, exec_state)
{
  var fast_all_scopes = exec_state.frame().allScopes(true);
  var length = fast_all_scopes.length;
  assertTrue(scopes.length >= length);
  for (var i = 0; i < scopes.length && i < length; i++) {
    var scope = fast_all_scopes[length - i - 1];
    assertEquals(scopes[scopes.length - i - 1], scope.scopeType());
  }
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}


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// Check that the scope chain contains the expected types of scopes.
function CheckScopeChain(scopes, exec_state) {
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  var all_scopes = exec_state.frame().allScopes();
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  assertEquals(scopes.length, exec_state.frame().scopeCount());
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  assertEquals(scopes.length, all_scopes.length, "FrameMirror.allScopes length");
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  for (var i = 0; i < scopes.length; i++) {
    var scope = exec_state.frame().scope(i);
    assertEquals(scopes[i], scope.scopeType());
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    assertScopeMirrorEquals(all_scopes[i], scope);
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    // Check the global object when hitting the global scope.
    if (scopes[i] == debug.ScopeType.Global) {
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      // Just check the marker of the global object.
      assertEquals(scope.scopeObject().value().global_marker, global_marker);
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    }
  }
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  CheckFastAllScopes(scopes, exec_state);
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}


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// Check that the scope chain contains the expected names of scopes.
function CheckScopeChainNames(names, exec_state) {
  var all_scopes = exec_state.frame().allScopes();
  assertEquals(names.length, all_scopes.length, "FrameMirror.allScopes length");
  for (var i = 0; i < names.length; i++) {
    var scope = exec_state.frame().scope(i);
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    // assertEquals(names[i], scope.details().name())
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  }
}


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// Check that the scope contains at least minimum_content. For functions just
// check that there is a function.
function CheckScopeContent(minimum_content, number, exec_state) {
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  var scope = exec_state.frame().scope(number);
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  var minimum_count = 0;
  for (var p in minimum_content) {
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    var property_mirror = scope.scopeObject().property(p);
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    assertFalse(property_mirror.isUndefined(),
                'property ' + p + ' not found in scope');
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    assertEquals(minimum_content[p], property_mirror.value().value(),
                 'property ' + p + ' has unexpected value');
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    minimum_count++;
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  }
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  // 'arguments' and might be exposed in the local and closure scope. Just
  // ignore this.
  var scope_size = scope.scopeObject().properties().length;
  if (!scope.scopeObject().property('arguments').isUndefined()) {
    scope_size--;
  }
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  // Ditto for 'this'.
  if (!scope.scopeObject().property('this').isUndefined()) {
    scope_size--;
  }
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  // Temporary variables introduced by the parser have not been materialized.
  assertTrue(scope.scopeObject().property('').isUndefined());
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  if (scope_size < minimum_count) {
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    print('Names found in scope:');
    var names = scope.scopeObject().propertyNames();
    for (var i = 0; i < names.length; i++) {
      print(names[i]);
    }
  }
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  assertTrue(scope_size >= minimum_count);
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}

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// Check that the scopes have positions as expected.
function CheckScopeChainPositions(positions, exec_state) {
  var all_scopes = exec_state.frame().allScopes();
  assertEquals(positions.length, all_scopes.length, "FrameMirror.allScopes length");
  for (var i = 0; i < positions.length; i++) {
    var scope = exec_state.frame().scope(i);
    var position = positions[i];
    if (!position)
      continue;

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    // assertEquals(position.start, scope.details().startPosition())
    // assertEquals(position.end, scope.details().endPosition())
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  }
}
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// Simple empty local scope.
BeginTest("Local 1");

function local_1() {
  debugger;
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Local,
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                   debug.ScopeType.Script,
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                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({}, 0, exec_state);
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};
local_1();
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EndTest();


// Local scope with a parameter.
BeginTest("Local 2");

function local_2(a) {
  debugger;
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Local,
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                   debug.ScopeType.Script,
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                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({a:1}, 0, exec_state);
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};
local_2(1);
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EndTest();


// Local scope with a parameter and a local variable.
BeginTest("Local 3");

function local_3(a) {
  var x = 3;
  debugger;
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Local,
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                   debug.ScopeType.Script,
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                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({a:1,x:3}, 0, exec_state);
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};
local_3(1);
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EndTest();


// Local scope with parameters and local variables.
BeginTest("Local 4");

function local_4(a, b) {
  var x = 3;
  var y = 4;
  debugger;
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Local,
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                   debug.ScopeType.Script,
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                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({a:1,b:2,x:3,y:4}, 0, exec_state);
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};
local_4(1, 2);
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EndTest();


// Empty local scope with use of eval.
BeginTest("Local 5");

function local_5() {
  eval('');
  debugger;
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Local,
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                   debug.ScopeType.Script,
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                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({}, 0, exec_state);
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};
local_5();
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EndTest();


// Local introducing local variable using eval.
BeginTest("Local 6");

function local_6() {
  eval('var i = 5');
  debugger;
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Local,
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                   debug.ScopeType.Script,
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                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({i:5}, 0, exec_state);
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};
local_6();
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EndTest();


// Local scope with parameters, local variables and local variable introduced
// using eval.
BeginTest("Local 7");

function local_7(a, b) {
  var x = 3;
  var y = 4;
  eval('var i = 5');
  eval('var j = 6');
  debugger;
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Local,
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                   debug.ScopeType.Script,
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                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({a:1,b:2,x:3,y:4,i:5,j:6}, 0, exec_state);
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};
local_7(1, 2);
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EndTest();


// Single empty with block.
BeginTest("With 1");

function with_1() {
  with({}) {
    debugger;
  }
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.With,
                   debug.ScopeType.Local,
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                   debug.ScopeType.Script,
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                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({}, 0, exec_state);
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};
with_1();
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EndTest();


// Nested empty with blocks.
BeginTest("With 2");

function with_2() {
  with({}) {
    with({}) {
      debugger;
    }
  }
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.With,
                   debug.ScopeType.With,
                   debug.ScopeType.Local,
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                   debug.ScopeType.Script,
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                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({}, 0, exec_state);
  CheckScopeContent({}, 1, exec_state);
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};
with_2();
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EndTest();


// With block using an in-place object literal.
BeginTest("With 3");

function with_3() {
  with({a:1,b:2}) {
    debugger;
  }
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.With,
                   debug.ScopeType.Local,
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                   debug.ScopeType.Script,
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                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({a:1,b:2}, 0, exec_state);
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};
with_3();
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EndTest();


// Nested with blocks using in-place object literals.
BeginTest("With 4");

function with_4() {
  with({a:1,b:2}) {
    with({a:2,b:1}) {
      debugger;
    }
  }
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.With,
                   debug.ScopeType.With,
                   debug.ScopeType.Local,
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                   debug.ScopeType.Script,
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                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({a:2,b:1}, 0, exec_state);
  CheckScopeContent({a:1,b:2}, 1, exec_state);
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};
with_4();
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EndTest();


// Nested with blocks using existing object.
BeginTest("With 5");

var with_object = {c:3,d:4};
function with_5() {
  with(with_object) {
    with(with_object) {
      debugger;
    }
  }
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.With,
                   debug.ScopeType.With,
                   debug.ScopeType.Local,
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                   debug.ScopeType.Script,
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                   debug.ScopeType.Global], exec_state);
  CheckScopeContent(with_object, 0, exec_state);
  CheckScopeContent(with_object, 1, exec_state);
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  assertEquals(exec_state.frame().scope(0).scopeObject().value(),
               exec_state.frame().scope(1).scopeObject().value());
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  assertEquals(with_object, exec_state.frame().scope(1).scopeObject().value());
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};
with_5();
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EndTest();


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// Nested with blocks using existing object in global code.
BeginTest("With 6");
listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.With,
                   debug.ScopeType.With,
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                   debug.ScopeType.Script,
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                   debug.ScopeType.Global], exec_state);
  CheckScopeContent(with_object, 0, exec_state);
  CheckScopeContent(with_object, 1, exec_state);
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  assertEquals(exec_state.frame().scope(0).scopeObject().value(),
               exec_state.frame().scope(1).scopeObject().value());
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  assertEquals(with_object, exec_state.frame().scope(1).scopeObject().value());
};

var with_object = {c:3,d:4};
with(with_object) {
  with(with_object) {
    debugger;
  }
}
EndTest();


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// With block in function that is marked for optimization while being executed.
BeginTest("With 7");

function with_7() {
  with({}) {
    %OptimizeFunctionOnNextCall(with_7);
    debugger;
  }
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.With,
                   debug.ScopeType.Local,
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                   debug.ScopeType.Script,
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                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({}, 0, exec_state);
};
with_7();
EndTest();


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// Simple closure formed by returning an inner function referering the outer
// functions arguments.
BeginTest("Closure 1");

function closure_1(a) {
  function f() {
    debugger;
    return a;
  };
  return f;
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Local,
                   debug.ScopeType.Closure,
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                   debug.ScopeType.Script,
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                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({a:1}, 1, exec_state);
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  CheckScopeChainNames(["f", "closure_1", undefined, undefined], exec_state);
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};
closure_1(1)();
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EndTest();


// Simple closure formed by returning an inner function referering the outer
// functions arguments. Due to VM optimizations parts of the actual closure is
// missing from the debugger information.
BeginTest("Closure 2");

function closure_2(a, b) {
  var x = a + 2;
  var y = b + 2;
  function f() {
    debugger;
    return a + x;
  };
  return f;
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Local,
                   debug.ScopeType.Closure,
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                   debug.ScopeType.Script,
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                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({a:1,x:3}, 1, exec_state);
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  CheckScopeChainNames(["f", "closure_2", undefined, undefined], exec_state);
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};
closure_2(1, 2)();
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EndTest();


// Simple closure formed by returning an inner function referering the outer
// functions arguments. Using all arguments and locals from the outer function
// in the inner function makes these part of the debugger information on the
// closure.
BeginTest("Closure 3");

function closure_3(a, b) {
  var x = a + 2;
  var y = b + 2;
  function f() {
    debugger;
    return a + b + x + y;
  };
  return f;
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Local,
                   debug.ScopeType.Closure,
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                   debug.ScopeType.Script,
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                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({a:1,b:2,x:3,y:4}, 1, exec_state);
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  CheckScopeChainNames(["f", "closure_3", undefined, undefined], exec_state);
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};
closure_3(1, 2)();
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EndTest();



// Simple closure formed by returning an inner function referering the outer
// functions arguments. Using all arguments and locals from the outer function
// in the inner function makes these part of the debugger information on the
// closure. Use the inner function as well...
BeginTest("Closure 4");

function closure_4(a, b) {
  var x = a + 2;
  var y = b + 2;
  function f() {
    debugger;
    if (f) {
      return a + b + x + y;
    }
  };
  return f;
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Local,
                   debug.ScopeType.Closure,
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                   debug.ScopeType.Script,
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                   debug.ScopeType.Global], exec_state);
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  CheckScopeContent({a:1,b:2,x:3,y:4,f:undefined}, 1, exec_state);
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  CheckScopeChainNames(["f", "closure_4", undefined, undefined], exec_state);
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};
closure_4(1, 2)();
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EndTest();



// Simple closure formed by returning an inner function referering the outer
// functions arguments. In the presence of eval all arguments and locals
// (including the inner function itself) from the outer function becomes part of
// the debugger infformation on the closure.
BeginTest("Closure 5");

function closure_5(a, b) {
  var x = 3;
  var y = 4;
  function f() {
    eval('');
    debugger;
    return 1;
  };
  return f;
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Local,
                   debug.ScopeType.Closure,
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                   debug.ScopeType.Script,
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                   debug.ScopeType.Global], exec_state);
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  CheckScopeContent({a:1,b:2,x:3,y:4,f:undefined}, 1, exec_state);
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  CheckScopeChainNames(["f", "closure_5", undefined, undefined], exec_state)
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};
closure_5(1, 2)();
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EndTest();


// Two closures. Due to optimizations only the parts actually used are provided
// through the debugger information.
BeginTest("Closure 6");
function closure_6(a, b) {
  function f(a, b) {
    var x = 3;
    var y = 4;
    return function() {
      var x = 3;
      var y = 4;
      debugger;
      some_global = a;
      return f;
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    };
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  }
  return f(a, b);
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Local,
                   debug.ScopeType.Closure,
                   debug.ScopeType.Closure,
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                   debug.ScopeType.Script,
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                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({a:1}, 1, exec_state);
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  CheckScopeContent({f:undefined}, 2, exec_state);
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  CheckScopeChainNames([undefined, "f", "closure_6", undefined, undefined],
                       exec_state);
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};
closure_6(1, 2)();
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EndTest();


// Two closures. In the presence of eval all information is provided as the
// compiler cannot determine which parts are used.
BeginTest("Closure 7");
function closure_7(a, b) {
  var x = 3;
  var y = 4;
  eval('var i = 5');
  eval('var j = 6');
  function f(a, b) {
    var x = 3;
    var y = 4;
    eval('var i = 5');
    eval('var j = 6');
    return function() {
      debugger;
      some_global = a;
      return f;
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    };
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  }
  return f(a, b);
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Local,
                   debug.ScopeType.Closure,
                   debug.ScopeType.Closure,
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                   debug.ScopeType.Script,
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                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({}, 0, exec_state);
  CheckScopeContent({a:1,b:2,x:3,y:4,i:5,j:6}, 1, exec_state);
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  CheckScopeContent({a:1,b:2,x:3,y:4,i:5,j:6,f:undefined}, 2, exec_state);
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  CheckScopeChainNames([undefined, "f", "closure_7", undefined, undefined],
                       exec_state);
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};
closure_7(1, 2)();
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EndTest();


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// Closure that may be optimized out.
BeginTest("Closure 8");
function closure_8() {
  (function inner(x) {
    debugger;
  })(2);
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Local,
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                   debug.ScopeType.Script,
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                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({x: 2}, 0, exec_state);
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  CheckScopeChainNames(["inner", undefined, undefined], exec_state);
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};
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closure_8();
EndTest();


BeginTest("Closure 9");
function closure_9() {
  eval("var y = 1;");
  eval("var z = 1;");
  (function inner(x) {
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    y++;
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    z++;
    debugger;
  })(2);
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Local,
                   debug.ScopeType.Closure,
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                   debug.ScopeType.Script,
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                   debug.ScopeType.Global], exec_state);
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  CheckScopeChainNames(["inner", "closure_9", undefined, undefined],
                       exec_state);
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};
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closure_9();
EndTest();


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// Closure with inferred name.
BeginTest("Closure with Inferred Name 1");

function closure_1_inferred_name(a) {
  let foo = {};
  foo.bar = function() {
    debugger;
    return a;
  };
  return foo.bar;
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Local,
                   debug.ScopeType.Closure,
                   debug.ScopeType.Script,
                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({a:1}, 1, exec_state);
  CheckScopeChainNames(["foo.bar", "closure_1_inferred_name", undefined,
      undefined], exec_state);
};
closure_1_inferred_name(1)();
EndTest();

// Closure with nested inferred name.
BeginTest("Closure with Inferred Name 2");

function closure_2_inferred_name(a) {
  let foo = {};
  function FooBar(b) {
    foo.baz = function() {
      debugger;
      return a+b;
    }
    return foo.baz;
  };
  return FooBar;
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Local,
                   debug.ScopeType.Closure,
                   debug.ScopeType.Closure,
                   debug.ScopeType.Script,
                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({b:0x1235}, 1, exec_state);
  CheckScopeContent({a:0x1234}, 2, exec_state);
  CheckScopeChainNames(["FooBar.foo.baz", "FooBar", "closure_2_inferred_name",
      undefined, undefined], exec_state);
};
closure_2_inferred_name(0x1234)(0x1235)();
EndTest();


// Closure with nested inferred name.
BeginTest("Closure with Inferred Name 3");

function closure_3_inferred_name(a) {
  let foo = {};
  foo.bar = function(b) {
    foo.baz = function() {
      debugger;
      return a+b;
    }
    return foo.baz;
  };
  return foo.bar;
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Local,
                   debug.ScopeType.Closure,
                   debug.ScopeType.Closure,
                   debug.ScopeType.Script,
                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({b:0x1235}, 1, exec_state);
  CheckScopeContent({a:0x1234}, 2, exec_state);
  CheckScopeChainNames(["foo.baz", "foo.bar", "closure_3_inferred_name",
      undefined, undefined], exec_state);
};
closure_3_inferred_name(0x1234)(0x1235)();
EndTest();

808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834
BeginTest("Closure passed to optimized Array.prototype.forEach");
function closure_10(a) {
  var x = a + 2;
  function closure_11(b) {
    debugger;
    return a + b + x;
  }
  [42].forEach(closure_11);
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Local,
                   debug.ScopeType.Closure,
                   debug.ScopeType.Script,
                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({b:42}, 0, exec_state);
  CheckScopeContent({a:5, x:7}, 1, exec_state);
  CheckScopeChainNames(
      ["closure_11", "closure_10", undefined, undefined], exec_state);
};
begin_test_count++; closure_10(5); end_test_count++;
begin_test_count++; closure_10(5); end_test_count++;
%OptimizeFunctionOnNextCall(closure_10);
closure_10(5);
EndTest();


835 836 837 838 839 840 841 842 843 844 845 846 847 848 849
// Test a mixture of scopes.
BeginTest("The full monty");
function the_full_monty(a, b) {
  var x = 3;
  var y = 4;
  eval('var i = 5');
  eval('var j = 6');
  function f(a, b) {
    var x = 9;
    var y = 10;
    eval('var i = 11');
    eval('var j = 12');
    with ({j:13}){
      return function() {
        var x = 14;
850
        with ({a:15}) {
851 852 853 854 855 856
          with ({b:16}) {
            debugger;
            some_global = a;
            return f;
          }
        }
857
      };
858 859 860 861 862 863 864 865 866 867 868 869
    }
  }
  return f(a, b);
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.With,
                   debug.ScopeType.With,
                   debug.ScopeType.Local,
                   debug.ScopeType.With,
                   debug.ScopeType.Closure,
                   debug.ScopeType.Closure,
870
                   debug.ScopeType.Script,
871 872 873 874 875 876
                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({b:16}, 0, exec_state);
  CheckScopeContent({a:15}, 1, exec_state);
  CheckScopeContent({x:14}, 2, exec_state);
  CheckScopeContent({j:13}, 3, exec_state);
  CheckScopeContent({a:1,b:2,x:9,y:10,i:11,j:12}, 4, exec_state);
877
  CheckScopeContent({a:1,b:2,x:3,y:4,i:5,j:6,f:undefined}, 5, exec_state);
878 879
  CheckScopeChainNames([undefined, undefined, undefined, "f", "f",
                        "the_full_monty", undefined, undefined], exec_state);
880 881
};
the_full_monty(1, 2)();
882 883
EndTest();

884 885 886 887 888 889 890 891 892 893 894 895 896

BeginTest("Closure inside With 1");
function closure_in_with_1() {
  with({x:1}) {
    (function inner(x) {
      debugger;
    })(2);
  }
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Local,
                   debug.ScopeType.With,
897
                   debug.ScopeType.Script,
898 899
                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({x: 2}, 0, exec_state);
900
  CheckScopeContent({x: 1}, 1, exec_state);
901
};
902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920
closure_in_with_1();
EndTest();


BeginTest("Closure inside With 2");
function closure_in_with_2() {
  with({x:1}) {
    (function inner(x) {
      with({x:3}) {
        debugger;
      }
    })(2);
  }
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.With,
                   debug.ScopeType.Local,
                   debug.ScopeType.With,
921
                   debug.ScopeType.Script,
922 923 924 925
                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({x: 3}, 0, exec_state);
  CheckScopeContent({x: 2}, 1, exec_state);
  CheckScopeContent({x: 1}, 2, exec_state);
926 927
  CheckScopeChainNames(["inner", "inner", "closure_in_with_2",
                        undefined, undefined], exec_state);
928
};
929 930 931 932 933 934 935 936 937 938 939 940 941 942
closure_in_with_2();
EndTest();


BeginTest("Closure inside With 3");
function createClosure(a) {
   var b = a + 1;
   return function closure() {
     var c = b;
     (function inner(x) {
       with({x:c}) {
         debugger;
       }
     })(2);
943
   };
944 945 946 947 948 949 950 951 952 953 954 955
}

function closure_in_with_3() {
  var f = createClosure(0);
  f();
}

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.With,
                   debug.ScopeType.Local,
                   debug.ScopeType.Closure,
                   debug.ScopeType.Closure,
956
                   debug.ScopeType.Script,
957
                   debug.ScopeType.Global], exec_state);
958 959
  CheckScopeChainNames(["inner", "inner", "closure", "createClosure",
                        undefined, undefined], exec_state);
960 961 962 963 964
}
closure_in_with_3();
EndTest();


965 966 967 968
BeginTest("Closure inside With 4");
listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Local,
                   debug.ScopeType.With,
969
                   debug.ScopeType.Script,
970 971 972
                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({x: 2}, 0, exec_state);
  CheckScopeContent({x: 1}, 1, exec_state);
973 974
  CheckScopeChainNames([undefined, undefined, undefined, undefined],
                       exec_state);
975 976 977 978 979 980 981 982 983 984
};

with({x:1}) {
  (function(x) {
    debugger;
  })(2);
}
EndTest();


985 986 987
// Test global scope.
BeginTest("Global");
listener_delegate = function(exec_state) {
988 989 990
  CheckScopeChain([debug.ScopeType.Script, debug.ScopeType.Global],
                  exec_state);
  CheckScopeChainNames([undefined, undefined], exec_state);
991
};
992 993 994
debugger;
EndTest();

995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008

BeginTest("Catch block 1");
function catch_block_1() {
  try {
    throw 'Exception';
  } catch (e) {
    debugger;
  }
};


listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Catch,
                   debug.ScopeType.Local,
1009
                   debug.ScopeType.Script,
1010 1011
                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({e:'Exception'}, 0, exec_state);
1012 1013
  CheckScopeChainNames(["catch_block_1", "catch_block_1",
                        undefined, undefined], exec_state);
1014 1015
};
catch_block_1();
1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034
EndTest();


BeginTest("Catch block 2");
function catch_block_2() {
  try {
    throw 'Exception';
  } catch (e) {
    with({n:10}) {
      debugger;
    }
  }
};


listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.With,
                   debug.ScopeType.Catch,
                   debug.ScopeType.Local,
1035
                   debug.ScopeType.Script,
1036 1037 1038
                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({n:10}, 0, exec_state);
  CheckScopeContent({e:'Exception'}, 1, exec_state);
1039 1040
  CheckScopeChainNames(["catch_block_2", "catch_block_2", "catch_block_2",
                        undefined, undefined], exec_state);
1041 1042
};
catch_block_2();
1043 1044 1045 1046
EndTest();


BeginTest("Catch block 3");
1047
function catch_block_3() {
1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061
  // Do eval to dynamically declare a local variable so that the context's
  // extension slot is initialized with JSContextExtensionObject.
  eval("var y = 78;");
  try {
    throw 'Exception';
  } catch (e) {
    debugger;
  }
};


listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Catch,
                   debug.ScopeType.Local,
1062
                   debug.ScopeType.Script,
1063 1064 1065
                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({e:'Exception'}, 0, exec_state);
  CheckScopeContent({y:78}, 1, exec_state);
1066 1067
  CheckScopeChainNames(["catch_block_3", "catch_block_3",
                        undefined, undefined], exec_state);
1068 1069
};
catch_block_3();
1070 1071 1072 1073
EndTest();


BeginTest("Catch block 4");
1074
function catch_block_4() {
1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090
  // Do eval to dynamically declare a local variable so that the context's
  // extension slot is initialized with JSContextExtensionObject.
  eval("var y = 98;");
  try {
    throw 'Exception';
  } catch (e) {
    with({n:10}) {
      debugger;
    }
  }
};

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.With,
                   debug.ScopeType.Catch,
                   debug.ScopeType.Local,
1091
                   debug.ScopeType.Script,
1092 1093 1094 1095
                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({n:10}, 0, exec_state);
  CheckScopeContent({e:'Exception'}, 1, exec_state);
  CheckScopeContent({y:98}, 2, exec_state);
1096 1097
  CheckScopeChainNames(["catch_block_4", "catch_block_4", "catch_block_4",
                        undefined, undefined], exec_state);
1098 1099
};
catch_block_4();
1100 1101 1102
EndTest();


1103 1104 1105 1106
// Test catch in global scope.
BeginTest("Catch block 5");
listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Catch,
1107
                   debug.ScopeType.Script,
1108 1109
                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({e:'Exception'}, 0, exec_state);
1110
  CheckScopeChainNames([undefined, undefined, undefined], exec_state);
1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126
};

try {
  throw 'Exception';
} catch (e) {
  debugger;
}

EndTest();


// Closure inside catch in global code.
BeginTest("Catch block 6");
listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Local,
                   debug.ScopeType.Catch,
1127
                   debug.ScopeType.Script,
1128 1129 1130
                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({x: 2}, 0, exec_state);
  CheckScopeContent({e:'Exception'}, 1, exec_state);
1131 1132
  CheckScopeChainNames([undefined, undefined, undefined, undefined],
                       exec_state);
1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144
};

try {
  throw 'Exception';
} catch (e) {
  (function(x) {
    debugger;
  })(2);
}
EndTest();


1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159
// Catch block in function that is marked for optimization while being executed.
BeginTest("Catch block 7");
function catch_block_7() {
  %OptimizeFunctionOnNextCall(catch_block_7);
  try {
    throw 'Exception';
  } catch (e) {
    debugger;
  }
};


listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Catch,
                   debug.ScopeType.Local,
1160
                   debug.ScopeType.Script,
1161 1162
                   debug.ScopeType.Global], exec_state);
  CheckScopeContent({e:'Exception'}, 0, exec_state);
1163 1164
  CheckScopeChainNames(["catch_block_7", "catch_block_7",
                        undefined, undefined], exec_state);
1165 1166 1167 1168 1169
};
catch_block_7();
EndTest();


1170 1171 1172 1173 1174 1175 1176
BeginTest("Classes and methods 1");

listener_delegate = function(exec_state) {
  "use strict"
  CheckScopeChain([debug.ScopeType.Local,
                   debug.ScopeType.Script,
                   debug.ScopeType.Global], exec_state);
1177
  CheckScopeContent({}, 1, exec_state);
1178
  CheckScopeChainNames(["m", undefined, undefined], exec_state);
1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192
};

(function() {
  "use strict";
  class C1 {
    m() {
      debugger;
    }
  }
  new C1().m();
})();

EndTest();

1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204
BeginTest("Scope positions");
var code1 = "function f() {        \n" +
            "  var a = 1;          \n" +
            "  function b() {      \n" +
            "    debugger;         \n" +
            "    return a + 1;     \n" +
            "  }                   \n" +
            "  b();                \n" +
            "}                     \n" +
            "f();                  \n";

listener_delegate = function(exec_state) {
1205 1206
  CheckScopeChainPositions(
      [{start: 58, end: 118}, {start: 10, end: 162}, {}, {}], exec_state);
1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234
}
eval(code1);
EndTest();


function catch_block_2() {
  try {
    throw 'Exception';
  } catch (e) {
    with({n:10}) {
      debugger;
    }
  }
};

BeginTest("Scope positions in catch and 'with' statement");
var code2 = "function catch_block() {   \n" +
            "  try {                    \n" +
            "    throw 'Exception';     \n" +
            "  } catch (e) {            \n" +
            "    with({n : 10}) {       \n" +
            "      debugger;            \n" +
            "    }                      \n" +
            "  }                        \n" +
            "}                          \n" +
            "catch_block();             \n";

listener_delegate = function(exec_state) {
1235 1236 1237 1238
  CheckScopeChainPositions([{start: 131, end: 173},
                            {start: 94, end: 199},
                            {start: 20, end: 225},
                            {}, {}], exec_state);
1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255
}
eval(code2);
EndTest();

BeginTest("Scope positions in for statement");
var code3 = "function for_statement() {         \n" +
            "  for (let i = 0; i < 1; i++) {    \n" +
            "    debugger;                      \n" +
            "  }                                \n" +
            "}                                  \n" +
            "for_statement();                   \n";

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Block,
                   debug.ScopeType.Local,
                   debug.ScopeType.Script,
                   debug.ScopeType.Global], exec_state);
1256
  CheckScopeChainPositions(
1257
      [{start: 42, end: 111}, {start: 22, end: 145}, {}, {}], exec_state);
1258 1259 1260
}
eval(code3);
EndTest();
1261

1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276
BeginTest("Scope positions in for statement with lexical block");
var code4 = "function for_statement() {         \n" +
            "  for (let i = 0; i < 1; i++) {    \n" +
            "    let j;                         \n" +
            "    debugger;                      \n" +
            "  }                                \n" +
            "}                                  \n" +
            "for_statement();                   \n";

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Block,
                   debug.ScopeType.Block,
                   debug.ScopeType.Local,
                   debug.ScopeType.Script,
                   debug.ScopeType.Global], exec_state);
1277
  CheckScopeChainPositions([{start: 66, end: 147},
1278
                            {start: 42, end: 147},
1279 1280
                            {start: 22, end: 181},
                            {}, {}], exec_state);
1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297
}
eval(code4);
EndTest();

BeginTest("Scope positions in lexical for each statement");
var code5 = "function for_each_statement() {    \n" +
            "  for (let i of [0]) {             \n" +
            "    debugger;                      \n" +
            "  }                                \n" +
            "}                                  \n" +
            "for_each_statement();              \n";

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Block,
                   debug.ScopeType.Local,
                   debug.ScopeType.Script,
                   debug.ScopeType.Global], exec_state);
1298 1299
  CheckScopeChainPositions(
      [{start: 55, end: 111}, {start: 27, end: 145}, {}, {}], exec_state);
1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318
}
eval(code5);
EndTest();

BeginTest("Scope positions in lexical for each statement with lexical block");
var code6 = "function for_each_statement() {    \n" +
            "  for (let i of [0]) {             \n" +
            "    let j;                         \n" +
            "    debugger;                      \n" +
            "  }                                \n" +
            "}                                  \n" +
            "for_each_statement();              \n";

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Block,
                   debug.ScopeType.Block,
                   debug.ScopeType.Local,
                   debug.ScopeType.Script,
                   debug.ScopeType.Global], exec_state);
1319 1320 1321 1322
  CheckScopeChainPositions([{start: 57, end: 147},
                            {start: 55, end: 147},
                            {start: 27, end: 181},
                            {}, {}], exec_state);
1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344
}
eval(code6);
EndTest();

BeginTest("Scope positions in non-lexical for each statement");
var code7 = "function for_each_statement() {    \n" +
            "  var i;                           \n" +
            "  for (i of [0]) {                 \n" +
            "    debugger;                      \n" +
            "  }                                \n" +
            "}                                  \n" +
            "for_each_statement();              \n";

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Local,
                   debug.ScopeType.Script,
                   debug.ScopeType.Global], exec_state);
  CheckScopeChainPositions([{start: 27, end: 181}, {}, {}], exec_state);
}
eval(code7);
EndTest();

1345 1346
BeginTest(
    "Scope positions in non-lexical for each statement with lexical block");
1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360
var code8 = "function for_each_statement() {    \n" +
            "  var i;                           \n" +
            "  for (i of [0]) {                 \n" +
            "    let j;                         \n" +
            "    debugger;                      \n" +
            "  }                                \n" +
            "}                                  \n" +
            "for_each_statement();              \n";

listener_delegate = function(exec_state) {
  CheckScopeChain([debug.ScopeType.Block,
                   debug.ScopeType.Local,
                   debug.ScopeType.Script,
                   debug.ScopeType.Global], exec_state);
1361 1362
  CheckScopeChainPositions(
      [{start: 89, end: 183}, {start: 27, end: 217}, {}, {}], exec_state);
1363 1364 1365 1366
}
eval(code8);
EndTest();

1367 1368 1369 1370
assertEquals(begin_test_count, break_count,
             'one or more tests did not enter the debugger');
assertEquals(begin_test_count, end_test_count,
             'one or more tests did not have its result checked');