v8/test/mjsunit/debug-evaluate-locals-optimized.js

// Copyright 2012 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
// met:
//
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// Flags: --expose-debug-as debug --expose-gc --allow-natives-syntax --inline-construct
// Get the Debug object exposed from the debug context global object.
Debug = debug.Debug

var listenerComplete = false;
var exception = false;

var testingConstructCall = false;

var expected = [
  { locals: {a0: 1, b0: 2}, args: { names: ["i", "x0", "y0"], values: [0, 3, 4] } },
  { locals: {a1: 3, b1: 4}, args: { names: ["i", "x1", "y1"], values: [1, 5, 6] } },
  { locals: {a2: 5, b2: 6}, args: { names: ["i"], values: [2] } },
  { locals: {a3: 7, b3: 8}, args: { names: ["i", "x3", "y3", "z3"], values: [3, 9, 10, undefined] } },
  { locals: {a4: 9, b4: 10}, args: { names: ["i", "x4", "y4"], values: [4, 11, 12] } }
];

function arraySum(arr) {
  return arr.reduce(function (a, b) { return a + b; }, 0);
}

function listener(event, exec_state, event_data, data) {
  try {
    if (event == Debug.DebugEvent.Break)
    {
      assertEquals(6, exec_state.frameCount());

      for (var i = 0; i < exec_state.frameCount(); i++) {
        var frame = exec_state.frame(i);
        if (i < exec_state.frameCount() - 1) {
          var expected_args = expected[i].args;
          var expected_locals = expected[i].locals;

          // All frames except the bottom one have expected locals.
          var locals = {};
          for (var j = 0; j < frame.localCount(); j++) {
            locals[frame.localName(j)] = frame.localValue(j).value();
          }
          assertPropertiesEqual(expected_locals, locals);

          // All frames except the bottom one have expected arguments.
          for (var j = 0; j < expected_args.names.length; j++) {
            assertEquals(expected_args.names[j], frame.argumentName(j));
            assertEquals(expected_args.values[j], frame.argumentValue(j).value());
          }

          // All frames except the bottom one have two scopes.
          assertEquals(2, frame.scopeCount());
          assertEquals(debug.ScopeType.Local, frame.scope(0).scopeType());
          assertEquals(debug.ScopeType.Global, frame.scope(1).scopeType());

          Object.keys(expected_locals).forEach(function (name) {
            assertEquals(expected_locals[name], frame.scope(0).scopeObject().value()[name]);
          });

          for (var j = 0; j < expected_args.names.length; j++) {
            var arg_name = expected_args.names[j];
            var arg_value = expected_args.values[j];
            assertEquals(arg_value, frame.scope(0).scopeObject().value()[arg_name]);
          }

          // Evaluate in the inlined frame.
          Object.keys(expected_locals).forEach(function (name) {
            assertEquals(expected_locals[name], frame.evaluate(name).value());
          });

          for (var j = 0; j < expected_args.names.length; j++) {
            var arg_name = expected_args.names[j];
            var arg_value = expected_args.values[j];
            assertEquals(arg_value, frame.evaluate(arg_name).value());
            assertEquals(arg_value, frame.evaluate('arguments['+j+']').value());
          }

          var expected_args_sum = arraySum(expected_args.values);
          var expected_locals_sum =
              arraySum(Object.keys(expected_locals).
                       map(function (k) { return expected_locals[k]; }));

          assertEquals(expected_locals_sum + expected_args_sum,
                       frame.evaluate(Object.keys(expected_locals).join('+') + ' + ' +
                                      expected_args.names.join('+')).value());

          var arguments_sum = expected_args.names.map(function(_, idx) {
            return "arguments[" + idx + "]";
          }).join('+');
          assertEquals(expected_args_sum,
                       frame.evaluate(arguments_sum).value());
        } else {
          // The bottom frame only have the global scope.
          assertEquals(1, frame.scopeCount());
          assertEquals(debug.ScopeType.Global, frame.scope(0).scopeType());
        }

        // Check the frame function.
        switch (i) {
          case 0: assertEquals(h, frame.func().value()); break;
          case 1: assertEquals(g3, frame.func().value()); break;
          case 2: assertEquals(g2, frame.func().value()); break;
          case 3: assertEquals(g1, frame.func().value()); break;
          case 4: assertEquals(f, frame.func().value()); break;
          case 5: break;
          default: assertUnreachable();
        }

        // Check for construct call.
        if (i == 4) {
          assertEquals(testingConstructCall, frame.isConstructCall());
        } else if (i == 2) {
          assertTrue(frame.isConstructCall());
        } else {
          assertFalse(frame.isConstructCall());
        }

        // When function f is optimized (1 means YES, see runtime.cc) we
        // expect an optimized frame for f with g1, g2 and g3 inlined.
        if (%GetOptimizationStatus(f) == 1) {
          if (i == 1 || i == 2 || i == 3) {
            assertTrue(frame.isOptimizedFrame());
            assertTrue(frame.isInlinedFrame());
            assertEquals(4 - i, frame.inlinedFrameIndex());
          } else if (i == 4) {
            assertTrue(frame.isOptimizedFrame());
            assertFalse(frame.isInlinedFrame());
          } else {
            assertFalse(frame.isOptimizedFrame());
            assertFalse(frame.isInlinedFrame());
          }
        }
      }

      // Indicate that all was processed.
      listenerComplete = true;
    }
  } catch (e) {
    exception = e.toString() + e.stack;
  };
};

for (var i = 0; i < 4; i++) f(expected.length - 1, 11, 12);
%OptimizeFunctionOnNextCall(f);
f(expected.length - 1, 11, 12);

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

function h(i, x0, y0) {
  var a0 = expected[i].locals.a0;
  var b0 = expected[i].locals.b0;
  debugger;  // Breakpoint.
}

function g3(i, x1, y1) {
  var a1 = expected[i].locals.a1;
  var b1 = expected[i].locals.b1;
  h(i - 1, a1, b1);
}

function g2(i) {
  var a2 = expected[i].locals.a2;
  var b2 = expected[i].locals.b2;
  g3(i - 1, a2, b2);
}

function g1(i, x3, y3, z3) {
  var a3 = expected[i].locals.a3;
  var b3 = expected[i].locals.b3;
  new g2(i - 1, a3, b3);
}

function f(i, x4, y4) {
  var a4 = expected[i].locals.a4;
  var b4 = expected[i].locals.b4;
  g1(i - 1, a4, b4);
}

// Test calling f normally and as a constructor.
f(expected.length - 1, 11, 12);
f(expected.length - 1, 11, 12, 0);
testingConstructCall = true;
new f(expected.length - 1, 11, 12);
new f(expected.length - 1, 11, 12, 0);

// Make sure that the debug event listener was invoked.
assertFalse(exception, "exception in listener " + exception)
assertTrue(listenerComplete);

// Throw away type information for next run.
gc();

Debug.setListener(null);