profiledataobject.js

//-------------------------------------------------------------------------------------------------------
// Copyright (C) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.
//-------------------------------------------------------------------------------------------------------

function constantLookup(val, table) {
    for (var prop in table) {
        if (table[prop] == val)
            return prop;
    }

    // Special case for ImplicitCallFlags
    if(table.Accessor)
    {
        var flags = [];
        if(val & table.None) flags.push("None");
        if((val & table.ToPrimitive) != table.None) flags.push("ToPrimitive");
        if((val & table.Accessor) != table.None) flags.push("Accessor");
        if((val & table.External) != table.None) flags.push("External");
        if((val & table.Exception) != table.None) flags.push("Exception");
        if(val == table.All) flags.push("All");
        if(val & table.Dispose) flags.push("Dispose");

        return flags.join(" | ");
    }

    // Special case for ValueType - unset all but the most significant type bit, preserve the 'likely' bit, exclude the array
    // detail bits, and look it up again
    if(table.hasOwnProperty("LikelyBit")) {
        var highestTypeBitIndex = table.VALUE_TYPE_COMMON_BIT_COUNT - 1;
        if(val & table.ObjectBit)
            val &= ~(((1 << table.VALUE_TYPE_OBJECT_BIT_COUNT) - 1) ^ ((1 << table.VALUE_TYPE_COMMON_BIT_COUNT) - 1))
        else
            highestTypeBitIndex += table.VALUE_TYPE_NONOBJECT_BIT_COUNT;

        for(var i = highestTypeBitIndex; i >= 0; --i) {
            if(val & (1 << i)) {
                var generalizedVal = val & (~((1 << i) - 1) | table.LikelyBit);
                for (var prop in table) {
                    if (table[prop] == generalizedVal)
                        return prop;
                }
                break;
            }
        }
    }

    return "ERROR: constant not found";
}

function dumpProfileData(f, msg) {
    WScript.Echo("Profile data for " + msg);

    var pdo;
    try {
        pdo = Debug.getProfileDataObject(f);
    }
    catch (ex) {
        WScript.Echo("No profile data found.");
        WScript.Echo("");
        WScript.Echo("");
        return;
    }

    if(pdo.returnTypeInfo.length)
        WScript.Echo("Return type info:");
    for (var i = 0; i < pdo.returnTypeInfo.length; ++i) {
        WScript.Echo("    #" + i + ": "  +  pdo.returnTypeInfo[i] + " (" + constantLookup(pdo.returnTypeInfo[i], pdo.ValueType) + ")");
    }
    
    if (pdo.elemInfo.length)
        WScript.Echo("Elem info:");
    for (var i = 0; i < pdo.elemInfo.length; ++i) {
        WScript.Echo("    #" + i + ": " + pdo.elemInfo[i] + " (" + constantLookup(pdo.elemInfo[i], pdo.ValueType) + ")");
    }

    if(pdo.parameterInfo.length)
        WScript.Echo("Param info:")
    for (var i = 0; i < pdo.parameterInfo.length; ++i) {
        WScript.Echo("    #" + i + ": " + pdo.parameterInfo[i] + " (" + constantLookup(pdo.parameterInfo[i], pdo.ValueType) + ")");
    }

    WScript.Echo("Implicit call flags:");
    WScript.Echo("    #" + i + ": " + pdo.implicitCallFlags + " (" + constantLookup(pdo.implicitCallFlags, pdo.ImplicitCallFlags) + ")");

    if(pdo.loopImplicitCallFlags.length)
        WScript.Echo("Loop implicit call flags:");
    for (var i = 0; i < pdo.loopImplicitCallFlags.length; ++i) {
        WScript.Echo("    #" + i + ": "  +  pdo.loopImplicitCallFlags[i] + " (" + constantLookup(pdo.loopImplicitCallFlags[i], pdo.ImplicitCallFlags) + ")");
    }


    WScript.Echo("");
    WScript.Echo("");
}

function I1(x) {
    return x;
}
function I2(x) {
    return x;
}
function I3(x) {
    return x;
}
function I4(x) {
    return x;
}

function test1() {
    var sum = I1("test") + I2(123) + I3(0.5) + I4({});
}

test1();
dumpProfileData(test1, "test1");


function test2(a,b,c,d,e,f) {
    var sum = 0;
    for (var i = 0; i < a.length; ++i) {
        sum += a[i];
    }
    for (var i = 0; i < b.length; ++i) {
        sum += b[i];
    }
    for (var i = 0; i < c.length; ++i) {
        sum += c[i];
    }
    for (var i = 0; i < d.length; ++i) {
        sum += d[i];
    }
    for (var i = 0; i < e.length; ++i) {
        sum += e[i];
    }
    for (var i = 0; i < f.length; ++i) {
        sum += f[i];
    }
}

test2(
    [1, 2, 3, 4, 5],
    [-0x80000000, 0x7fffffff],
    new Uint8Array(10),
    new Float64Array(10),
    new Int16Array(10),
    [0.3, 0.4, 0.5, 0.6, 0.7]
    );
dumpProfileData(test2, "test2");


test2(
    [1, 2, 3.5, 4.2, 5],
    [0, 0x7fffffff],
    new Uint8Array(10),
    "a string",
    new Int16Array(10),
    [0.3, 0.4, 0.5, 0.6, 0.7]
    );
dumpProfileData(test2, "test2 - second call");


function test3(a, b, c, d) {
    var sum = 0;
    for (var i = 0; i < a.p.length; ++i) {
        sum += a.p[i];
    }
    for (var i = 0; i < b.p.length; ++i) {
        sum += b.p[i];
    }
    if (/* false */typeof (c) === "blah") {
        sum += c.p[i];
    }
}

test3(
    { p: new Uint32Array(10) },
    { p: [null,,,,] },
    0
    );
dumpProfileData(test3, "test3");

// Try manipulating the profile data.
var pdo = Debug.getProfileDataObject(test3);
pdo.parameterInfo[0] = pdo.ValueType.Uninitialized;
pdo.parameterInfo[1] = pdo.ValueType.LikelyTaggedInt;
pdo.parameterInfo[2] = pdo.ValueType.LikelyNumber;
pdo.parameterInfo[3] = pdo.ValueType.LikelyString;
pdo.elemInfo[2] = pdo.ValueType.LikelyFloat64Array;
pdo.loopImplicitCallFlags[0] = pdo.ImplicitCallFlags.ToPrimitive;
dumpProfileData(test3, "test3 - after writing profile data");


function test4(a, b, c) {
    var sum = a + b + c;
}
dumpProfileData(test4, "test4 - before call");
test4(
    "a string",
    5.3,
    3
    );
dumpProfileData(test4, "test4");

test4(
    "a string",
    3,
    3
    );
dumpProfileData(test4, "test4 - second call");


function test5(a,b) {
    var x1 = { valueOf: function () { return 7; } };
    var x2 = { get prop() { return 8; } };
    var sum = 0;

    for (var i = 0; i < 5; ++i) {
    }
    for (var i = 0; i < 5; ++i) {
        sum += x1;
    }
    for (var i = 0; i < 5; ++i) {
        sum += x2.prop;
    }
    for (var i = 0; i < 5; ++i) {
        sum += x1 + x2.prop;
    }
}
test5();
dumpProfileData(test5, "test5");