v8/src/generator.js
yangguo 5cb925e448 Revert of Revert of Hook up more import/exports in natives. (patchset #1 id:1 of https://codereview.chromium.org/1154743003/)
Reason for revert:
Unrelated failure that was uncovered by this CL has been fixed (https://codereview.chromium.org/1152243002/)

Original issue's description:
> Revert of Hook up more import/exports in natives. (patchset #3 id:40001 of https://codereview.chromium.org/1154483002/)
>
> Reason for revert:
> [Sheriff] Speculative revert for gc stress failures:
> http://build.chromium.org/p/client.v8/builders/V8%20Linux64%20GC%20Stress%20-%20custom%20snapshot/builds/481
>
> Original issue's description:
> > Hook up more import/exports in natives.
> >
> > R=jkummerow@chromium.org
> >
> > Committed: https://crrev.com/7a918ac9658d11778f39593bfcc19d7c506defd9
> > Cr-Commit-Position: refs/heads/master@{#28573}
> >
> > Committed: https://crrev.com/e13a39dd7f4062898709d7c68900677df0513995
> > Cr-Commit-Position: refs/heads/master@{#28578}
>
> TBR=jkummerow@chromium.org,erik.corry@gmail.com,yangguo@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
>
> Committed: https://crrev.com/eb0024d1dbdda5f51b006dd54887404ee6c5cbfc
> Cr-Commit-Position: refs/heads/master@{#28584}

TBR=jkummerow@chromium.org,erik.corry@gmail.com,machenbach@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review URL: https://codereview.chromium.org/1149773003

Cr-Commit-Position: refs/heads/master@{#28608}
2015-05-26 07:24:21 +00:00

115 lines
3.5 KiB
JavaScript

// Copyright 2013 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
(function(global, utils) {
"use strict";
%CheckIsBootstrapping();
// -------------------------------------------------------------------
// Imports
var GlobalFunction = global.Function;
var NewFunctionString;
utils.Import(function(from) {
NewFunctionString = from.NewFunctionString;
});
// ----------------------------------------------------------------------------
// Generator functions and objects are specified by ES6, sections 15.19.3 and
// 15.19.4.
function GeneratorObjectNext(value) {
if (!IS_GENERATOR(this)) {
throw MakeTypeError(kIncompatibleMethodReceiver,
'[Generator].prototype.next', this);
}
var continuation = %GeneratorGetContinuation(this);
if (continuation > 0) {
// Generator is suspended.
if (DEBUG_IS_ACTIVE) %DebugPrepareStepInIfStepping(this);
try {
return %_GeneratorNext(this, value);
} catch (e) {
%GeneratorClose(this);
throw e;
}
} else if (continuation == 0) {
// Generator is already closed.
return { value: void 0, done: true };
} else {
// Generator is running.
throw MakeTypeError(kGeneratorRunning);
}
}
function GeneratorObjectThrow(exn) {
if (!IS_GENERATOR(this)) {
throw MakeTypeError(kIncompatibleMethodReceiver,
'[Generator].prototype.throw', this);
}
var continuation = %GeneratorGetContinuation(this);
if (continuation > 0) {
// Generator is suspended.
try {
return %_GeneratorThrow(this, exn);
} catch (e) {
%GeneratorClose(this);
throw e;
}
} else if (continuation == 0) {
// Generator is already closed.
throw exn;
} else {
// Generator is running.
throw MakeTypeError(kGeneratorRunning);
}
}
function GeneratorFunctionConstructor(arg1) { // length == 1
var source = NewFunctionString(arguments, 'function*');
var global_proxy = %GlobalProxy(GeneratorFunctionConstructor);
// Compile the string in the constructor and not a helper so that errors
// appear to come from here.
var f = %_CallFunction(global_proxy, %CompileString(source, true));
%FunctionMarkNameShouldPrintAsAnonymous(f);
return f;
}
// ----------------------------------------------------------------------------
// Both Runtime_GeneratorNext and Runtime_GeneratorThrow are supported by
// neither Crankshaft nor TurboFan, disable optimization of wrappers here.
%NeverOptimizeFunction(GeneratorObjectNext);
%NeverOptimizeFunction(GeneratorObjectThrow);
// Set up non-enumerable functions on the generator prototype object.
var GeneratorObjectPrototype = GeneratorFunctionPrototype.prototype;
utils.InstallFunctions(GeneratorObjectPrototype,
DONT_ENUM,
["next", GeneratorObjectNext,
"throw", GeneratorObjectThrow]);
%AddNamedProperty(GeneratorObjectPrototype, "constructor",
GeneratorFunctionPrototype, DONT_ENUM | READ_ONLY);
%AddNamedProperty(GeneratorObjectPrototype,
symbolToStringTag, "Generator", DONT_ENUM | READ_ONLY);
%InternalSetPrototype(GeneratorFunctionPrototype, GlobalFunction.prototype);
%AddNamedProperty(GeneratorFunctionPrototype,
symbolToStringTag, "GeneratorFunction", DONT_ENUM | READ_ONLY);
%AddNamedProperty(GeneratorFunctionPrototype, "constructor",
GeneratorFunction, DONT_ENUM | READ_ONLY);
%InternalSetPrototype(GeneratorFunction, GlobalFunction);
%SetCode(GeneratorFunction, GeneratorFunctionConstructor);
})