v8/test/mjsunit/migrations.js

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// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-ayle license that can be
// found in the LICENSE file.
// Flags: --allow-natives-syntax --track-fields --expose-gc
var global = Function('return this')();
var verbose = 0;
function test(ctor_desc, use_desc, migr_desc) {
var n = 5;
var objects = [];
var results = [];
if (verbose) {
print();
print("===========================================================");
print("=== " + ctor_desc.name +
" | " + use_desc.name + " |--> " + migr_desc.name);
print("===========================================================");
}
// Clean ICs and transitions.
%NotifyContextDisposed();
gc(); gc(); gc();
// create objects
if (verbose) {
print("-----------------------------");
print("--- construct");
print();
}
for (var i = 0; i < n; i++) {
objects[i] = ctor_desc.ctor.apply(ctor_desc, ctor_desc.args(i));
}
try {
// use them
if (verbose) {
print("-----------------------------");
print("--- use 1");
print();
}
var use = use_desc.use1;
for (var i = 0; i < n; i++) {
if (i == 3) %OptimizeFunctionOnNextCall(use);
results[i] = use(objects[i], i);
}
// trigger migrations
if (verbose) {
print("-----------------------------");
print("--- trigger migration");
print();
}
var migr = migr_desc.migr;
for (var i = 0; i < n; i++) {
if (i == 3) %OptimizeFunctionOnNextCall(migr);
migr(objects[i], i);
}
// use again
if (verbose) {
print("-----------------------------");
print("--- use 2");
print();
}
var use = use_desc.use2 !== undefined ? use_desc.use2 : use_desc.use1;
for (var i = 0; i < n; i++) {
if (i == 3) %OptimizeFunctionOnNextCall(use);
results[i] = use(objects[i], i);
if (verbose >= 2) print(results[i]);
}
} catch (e) {
if (verbose) print("--- incompatible use: " + e);
}
return results;
}
var ctors = [
{
name: "none-to-double",
ctor: function(v) { return {a: v}; },
args: function(i) { return [1.5 + i]; },
},
{
name: "double",
ctor: function(v) { var o = {}; o.a = v; return o; },
args: function(i) { return [1.5 + i]; },
},
{
name: "none-to-smi",
ctor: function(v) { return {a: v}; },
args: function(i) { return [i]; },
},
{
name: "smi",
ctor: function(v) { var o = {}; o.a = v; return o; },
args: function(i) { return [i]; },
},
{
name: "none-to-object",
ctor: function(v) { return {a: v}; },
args: function(i) { return ["s"]; },
},
{
name: "object",
ctor: function(v) { var o = {}; o.a = v; return o; },
args: function(i) { return ["s"]; },
},
{
name: "{a:, b:, c:}",
ctor: function(v1, v2, v3) { return {a: v1, b: v2, c: v3}; },
args: function(i) { return [1.5 + i, 1.6, 1.7]; },
},
{
name: "{a..h:}",
ctor: function(v) { var o = {}; o.h=o.g=o.f=o.e=o.d=o.c=o.b=o.a=v; return o; },
args: function(i) { return [1.5 + i]; },
},
{
name: "1",
ctor: function(v) { var o = 1; o.a = v; return o; },
args: function(i) { return [1.5 + i]; },
},
{
name: "f()",
ctor: function(v) { var o = function() { return v;}; o.a = v; return o; },
args: function(i) { return [1.5 + i]; },
},
{
name: "f().bind",
ctor: function(v) { var o = function(a,b,c) { return a+b+c; }; o = o.bind(o, v, v+1, v+2.2); return o; },
args: function(i) { return [1.5 + i]; },
},
{
name: "dictionary elements",
ctor: function(v) { var o = []; o[1] = v; o[200000] = v; return o; },
args: function(i) { return [1.5 + i]; },
},
{
name: "json",
ctor: function(v) { var json = '{"a":' + v + ',"b":' + v + '}'; return JSON.parse(json); },
args: function(i) { return [1.5 + i]; },
},
{
name: "fast accessors",
accessor: {
get: function() { return this.a_; },
set: function(value) {this.a_ = value; },
configurable: true,
},
ctor: function(v) {
var o = {a_:v};
Object.defineProperty(o, "a", this.accessor);
return o;
},
args: function(i) { return [1.5 + i]; },
},
{
name: "slow accessor",
accessor1: { value: this.a_, configurable: true },
accessor2: {
get: function() { return this.a_; },
set: function(value) {this.a_ = value; },
configurable: true,
},
ctor: function(v) {
var o = {a_:v};
Object.defineProperty(o, "a", this.accessor1);
Object.defineProperty(o, "a", this.accessor2);
return o;
},
args: function(i) { return [1.5 + i]; },
},
{
name: "slow",
proto: {},
ctor: function(v) {
var o = {__proto__: this.proto};
o.a = v;
for (var i = 0; %HasFastProperties(o); i++) o["f"+i] = v;
return o;
},
args: function(i) { return [1.5 + i]; },
},
{
name: "global",
ctor: function(v) { return global; },
args: function(i) { return [i]; },
},
];
var uses = [
{
name: "o.a+1.0",
use1: function(o, i) { return o.a + 1.0; },
use2: function(o, i) { return o.a + 1.1; },
},
{
name: "o.b+1.0",
use1: function(o, i) { return o.b + 1.0; },
use2: function(o, i) { return o.b + 1.1; },
},
{
name: "o[1]+1.0",
use1: function(o, i) { return o[1] + 1.0; },
use2: function(o, i) { return o[1] + 1.1; },
},
{
name: "o[-1]+1.0",
use1: function(o, i) { return o[-1] + 1.0; },
use2: function(o, i) { return o[-1] + 1.1; },
},
{
name: "()",
use1: function(o, i) { return o() + 1.0; },
use2: function(o, i) { return o() + 1.1; },
},
];
var migrations = [
{
name: "to smi",
migr: function(o, i) { if (i == 0) o.a = 1; },
},
{
name: "to double",
migr: function(o, i) { if (i == 0) o.a = 1.1; },
},
{
name: "to object",
migr: function(o, i) { if (i == 0) o.a = {}; },
},
{
name: "set prototype {}",
migr: function(o, i) { o.__proto__ = {}; },
},
{
name: "%FunctionSetPrototype",
migr: function(o, i) { %FunctionSetPrototype(o, null); },
},
{
name: "modify prototype",
migr: function(o, i) { if (i == 0) o.__proto__.__proto1__ = [,,,5,,,]; },
},
{
name: "freeze prototype",
migr: function(o, i) { if (i == 0) Object.freeze(o.__proto__); },
},
{
name: "delete and re-add property",
migr: function(o, i) { var v = o.a; delete o.a; o.a = v; },
},
{
name: "modify prototype",
migr: function(o, i) { if (i >= 0) o.__proto__ = {}; },
},
{
name: "set property callback",
migr: function(o, i) {
Object.defineProperty(o, "a", {
get: function() { return 1.5 + i; },
set: function(value) {},
configurable: true,
});
},
},
{
name: "observe",
migr: function(o, i) { Object.observe(o, function(){}); },
},
{
name: "%EnableAccessChecks",
migr: function(o, i) {
if (typeof (o) !== 'function') %EnableAccessChecks(o);
},
},
{
name: "%DisableAccessChecks",
migr: function(o, i) {
if ((typeof (o) !== 'function') && (o !== global)) %DisableAccessChecks(o);
},
},
{
name: "seal",
migr: function(o, i) { Object.seal(o); },
},
{ // Must be the last in the sequence, because after the global object freeze
// the other modifications does not make sence.
name: "freeze",
migr: function(o, i) { Object.freeze(o); },
},
];
migrations.forEach(function(migr) {
uses.forEach(function(use) {
ctors.forEach(function(ctor) {
test(ctor, use, migr);
});
});
});