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<title>[194643] trunk/Source/JavaScriptCore</title>
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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/194643">194643</a></dd>
<dt>Author</dt> <dd>keith_miller@apple.com</dd>
<dt>Date</dt> <dd>2016-01-06 10:25:01 -0800 (Wed, 06 Jan 2016)</dd>
</dl>
<h3>Log Message</h3>
<pre>[ES6] Boolean, Number, Map, RegExp, and Set should be subclassable
https://bugs.webkit.org/show_bug.cgi?id=152765
Reviewed by Michael Saboff.
This patch enables subclassing of five more builtins: Boolean, Number, Map, RegExp, and Set.
* runtime/BooleanConstructor.cpp:
(JSC::constructWithBooleanConstructor):
(JSC::constructBoolean): Deleted.
* runtime/BooleanConstructor.h:
* runtime/MapConstructor.cpp:
(JSC::constructMap):
* runtime/NumberConstructor.cpp:
(JSC::constructWithNumberConstructor):
* runtime/RegExpConstructor.cpp:
(JSC::getRegExpStructure):
(JSC::constructRegExp):
* runtime/SetConstructor.cpp:
(JSC::constructSet):
* tests/es6.yaml:
* tests/stress/class-subclassing-misc.js: Added.
(B):
(N):
(M):
(R):
(S):
(test):</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceJavaScriptCoreChangeLog">trunk/Source/JavaScriptCore/ChangeLog</a></li>
<li><a href="#trunkSourceJavaScriptCoreruntimeBooleanConstructorcpp">trunk/Source/JavaScriptCore/runtime/BooleanConstructor.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoreruntimeBooleanConstructorh">trunk/Source/JavaScriptCore/runtime/BooleanConstructor.h</a></li>
<li><a href="#trunkSourceJavaScriptCoreruntimeMapConstructorcpp">trunk/Source/JavaScriptCore/runtime/MapConstructor.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoreruntimeNumberConstructorcpp">trunk/Source/JavaScriptCore/runtime/NumberConstructor.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoreruntimeRegExpConstructorcpp">trunk/Source/JavaScriptCore/runtime/RegExpConstructor.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoreruntimeSetConstructorcpp">trunk/Source/JavaScriptCore/runtime/SetConstructor.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoretestses6yaml">trunk/Source/JavaScriptCore/tests/es6.yaml</a></li>
</ul>
<h3>Added Paths</h3>
<ul>
<li><a href="#trunkSourceJavaScriptCoretestsstressclasssubclassingmiscjs">trunk/Source/JavaScriptCore/tests/stress/class-subclassing-misc.js</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceJavaScriptCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/ChangeLog (194642 => 194643)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/ChangeLog 2016-01-06 18:23:24 UTC (rev 194642)
+++ trunk/Source/JavaScriptCore/ChangeLog 2016-01-06 18:25:01 UTC (rev 194643)
</span><span class="lines">@@ -1,3 +1,34 @@
</span><ins>+2016-01-05 Keith Miller <keith_miller@apple.com>
+
+ [ES6] Boolean, Number, Map, RegExp, and Set should be subclassable
+ https://bugs.webkit.org/show_bug.cgi?id=152765
+
+ Reviewed by Michael Saboff.
+
+ This patch enables subclassing of five more builtins: Boolean, Number, Map, RegExp, and Set.
+
+ * runtime/BooleanConstructor.cpp:
+ (JSC::constructWithBooleanConstructor):
+ (JSC::constructBoolean): Deleted.
+ * runtime/BooleanConstructor.h:
+ * runtime/MapConstructor.cpp:
+ (JSC::constructMap):
+ * runtime/NumberConstructor.cpp:
+ (JSC::constructWithNumberConstructor):
+ * runtime/RegExpConstructor.cpp:
+ (JSC::getRegExpStructure):
+ (JSC::constructRegExp):
+ * runtime/SetConstructor.cpp:
+ (JSC::constructSet):
+ * tests/es6.yaml:
+ * tests/stress/class-subclassing-misc.js: Added.
+ (B):
+ (N):
+ (M):
+ (R):
+ (S):
+ (test):
+
</ins><span class="cx"> 2016-01-06 Julien Brianceau <jbriance@cisco.com>
</span><span class="cx">
</span><span class="cx"> [mips] Fix branchTruncateDoubleToUint32 implementation in macro assembler
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreruntimeBooleanConstructorcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/runtime/BooleanConstructor.cpp (194642 => 194643)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/runtime/BooleanConstructor.cpp 2016-01-06 18:23:24 UTC (rev 194642)
+++ trunk/Source/JavaScriptCore/runtime/BooleanConstructor.cpp 2016-01-06 18:25:01 UTC (rev 194643)
</span><span class="lines">@@ -1,6 +1,6 @@
</span><span class="cx"> /*
</span><span class="cx"> * Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
</span><del>- * Copyright (C) 2003, 2008 Apple Inc. All rights reserved.
</del><ins>+ * Copyright (C) 2003, 2008, 2016 Apple Inc. All rights reserved.
</ins><span class="cx"> *
</span><span class="cx"> * This library is free software; you can redistribute it and/or
</span><span class="cx"> * modify it under the terms of the GNU Lesser General Public
</span><span class="lines">@@ -46,17 +46,18 @@
</span><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> // ECMA 15.6.2
</span><del>-JSObject* constructBoolean(ExecState* exec, const ArgList& args)
</del><ins>+static EncodedJSValue JSC_HOST_CALL constructWithBooleanConstructor(ExecState* exec)
</ins><span class="cx"> {
</span><del>- BooleanObject* obj = BooleanObject::create(exec->vm(), asInternalFunction(exec->callee())->globalObject()->booleanObjectStructure());
- obj->setInternalValue(exec->vm(), jsBoolean(args.at(0).toBoolean(exec)));
- return obj;
-}
</del><ins>+ JSValue boolean = jsBoolean(exec->argument(0).toBoolean(exec));
</ins><span class="cx">
</span><del>-static EncodedJSValue JSC_HOST_CALL constructWithBooleanConstructor(ExecState* exec)
-{
- ArgList args(exec);
- return JSValue::encode(constructBoolean(exec, args));
</del><ins>+ JSValue prototype = JSValue();
+ JSValue newTarget = exec->newTarget();
+ if (newTarget != exec->callee())
+ prototype = newTarget.get(exec, exec->propertyNames().prototype);
+
+ BooleanObject* obj = BooleanObject::create(exec->vm(), Structure::createSubclassStructure(exec->vm(), asInternalFunction(exec->callee())->globalObject()->booleanObjectStructure(), prototype));
+ obj->setInternalValue(exec->vm(), boolean);
+ return JSValue::encode(obj);
</ins><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> ConstructType BooleanConstructor::getConstructData(JSCell*, ConstructData& constructData)
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreruntimeBooleanConstructorh"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/runtime/BooleanConstructor.h (194642 => 194643)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/runtime/BooleanConstructor.h 2016-01-06 18:23:24 UTC (rev 194642)
+++ trunk/Source/JavaScriptCore/runtime/BooleanConstructor.h 2016-01-06 18:25:01 UTC (rev 194643)
</span><span class="lines">@@ -1,6 +1,6 @@
</span><span class="cx"> /*
</span><span class="cx"> * Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
</span><del>- * Copyright (C) 2008 Apple Inc. All rights reserved.
</del><ins>+ * Copyright (C) 2008, 2016 Apple Inc. All rights reserved.
</ins><span class="cx"> *
</span><span class="cx"> * This library is free software; you can redistribute it and/or
</span><span class="cx"> * modify it under the terms of the GNU Lesser General Public
</span><span class="lines">@@ -55,7 +55,6 @@
</span><span class="cx"> };
</span><span class="cx">
</span><span class="cx"> JSObject* constructBooleanFromImmediateBoolean(ExecState*, JSGlobalObject*, JSValue);
</span><del>-JSObject* constructBoolean(ExecState*, const ArgList&);
</del><span class="cx">
</span><span class="cx"> } // namespace JSC
</span><span class="cx">
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreruntimeMapConstructorcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/runtime/MapConstructor.cpp (194642 => 194643)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/runtime/MapConstructor.cpp 2016-01-06 18:23:24 UTC (rev 194642)
+++ trunk/Source/JavaScriptCore/runtime/MapConstructor.cpp 2016-01-06 18:25:01 UTC (rev 194643)
</span><span class="lines">@@ -1,5 +1,5 @@
</span><span class="cx"> /*
</span><del>- * Copyright (C) 2013 Apple Inc. All rights reserved.
</del><ins>+ * Copyright (C) 2013, 2016 Apple Inc. All rights reserved.
</ins><span class="cx"> *
</span><span class="cx"> * Redistribution and use in source and binary forms, with or without
</span><span class="cx"> * modification, are permitted provided that the following conditions
</span><span class="lines">@@ -53,8 +53,14 @@
</span><span class="cx">
</span><span class="cx"> static EncodedJSValue JSC_HOST_CALL constructMap(ExecState* exec)
</span><span class="cx"> {
</span><ins>+ JSValue prototype = JSValue();
+ JSValue newTarget = exec->newTarget();
+
+ if (newTarget != exec->callee())
+ prototype = newTarget.get(exec, exec->propertyNames().prototype);
+
</ins><span class="cx"> JSGlobalObject* globalObject = asInternalFunction(exec->callee())->globalObject();
</span><del>- Structure* mapStructure = globalObject->mapStructure();
</del><ins>+ Structure* mapStructure = Structure::createSubclassStructure(exec->vm(), globalObject->mapStructure(), prototype);
</ins><span class="cx"> JSMap* map = JSMap::create(exec, mapStructure);
</span><span class="cx"> JSValue iterable = exec->argument(0);
</span><span class="cx"> if (iterable.isUndefinedOrNull())
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreruntimeNumberConstructorcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/runtime/NumberConstructor.cpp (194642 => 194643)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/runtime/NumberConstructor.cpp 2016-01-06 18:23:24 UTC (rev 194642)
+++ trunk/Source/JavaScriptCore/runtime/NumberConstructor.cpp 2016-01-06 18:25:01 UTC (rev 194643)
</span><span class="lines">@@ -1,6 +1,6 @@
</span><span class="cx"> /*
</span><span class="cx"> * Copyright (C) 1999-2000,2003 Harri Porten (porten@kde.org)
</span><del>- * Copyright (C) 2007, 2008, 2011, 2015 Apple Inc. All rights reserved.
</del><ins>+ * Copyright (C) 2007, 2008, 2011, 2015-2016 Apple Inc. All rights reserved.
</ins><span class="cx"> *
</span><span class="cx"> * This library is free software; you can redistribute it and/or
</span><span class="cx"> * modify it under the terms of the GNU Lesser General Public
</span><span class="lines">@@ -27,6 +27,7 @@
</span><span class="cx"> #include "NumberPrototype.h"
</span><span class="cx"> #include "JSCInlines.h"
</span><span class="cx"> #include "JSGlobalObjectFunctions.h"
</span><ins>+#include "StructureInlines.h"
</ins><span class="cx">
</span><span class="cx"> namespace JSC {
</span><span class="cx">
</span><span class="lines">@@ -79,8 +80,15 @@
</span><span class="cx"> // ECMA 15.7.1
</span><span class="cx"> static EncodedJSValue JSC_HOST_CALL constructWithNumberConstructor(ExecState* exec)
</span><span class="cx"> {
</span><del>- NumberObject* object = NumberObject::create(exec->vm(), asInternalFunction(exec->callee())->globalObject()->numberObjectStructure());
</del><span class="cx"> double n = exec->argumentCount() ? exec->uncheckedArgument(0).toNumber(exec) : 0;
</span><ins>+
+ JSValue prototype = JSValue();
+ JSValue newTarget = exec->newTarget();
+ if (newTarget != exec->callee())
+ prototype = newTarget.get(exec, exec->propertyNames().prototype);
+
+ NumberObject* object = NumberObject::create(exec->vm(), Structure::createSubclassStructure(exec->vm(), asInternalFunction(exec->callee())->globalObject()->numberObjectStructure(), prototype));
+
</ins><span class="cx"> object->setInternalValue(exec->vm(), jsNumber(n));
</span><span class="cx"> return JSValue::encode(object);
</span><span class="cx"> }
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreruntimeRegExpConstructorcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/runtime/RegExpConstructor.cpp (194642 => 194643)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/runtime/RegExpConstructor.cpp 2016-01-06 18:23:24 UTC (rev 194642)
+++ trunk/Source/JavaScriptCore/runtime/RegExpConstructor.cpp 2016-01-06 18:25:01 UTC (rev 194643)
</span><span class="lines">@@ -1,6 +1,6 @@
</span><span class="cx"> /*
</span><span class="cx"> * Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
</span><del>- * Copyright (C) 2003, 2007, 2008 Apple Inc. All Rights Reserved.
</del><ins>+ * Copyright (C) 2003, 2007, 2008, 2016 Apple Inc. All Rights Reserved.
</ins><span class="cx"> * Copyright (C) 2009 Torch Mobile, Inc.
</span><span class="cx"> *
</span><span class="cx"> * This library is free software; you can redistribute it and/or
</span><span class="lines">@@ -26,6 +26,7 @@
</span><span class="cx"> #include "JSCInlines.h"
</span><span class="cx"> #include "RegExpMatchesArray.h"
</span><span class="cx"> #include "RegExpPrototype.h"
</span><ins>+#include "StructureInlines.h"
</ins><span class="cx">
</span><span class="cx"> namespace JSC {
</span><span class="cx">
</span><span class="lines">@@ -242,6 +243,16 @@
</span><span class="cx"> constructor->setMultiline(JSValue::decode(value).toBoolean(exec));
</span><span class="cx"> }
</span><span class="cx">
</span><ins>+inline Structure* getRegExpStructure(ExecState* exec, JSGlobalObject* globalObject, bool callAsConstructor)
+{
+ Structure* structure = globalObject->regExpStructure();
+ if (callAsConstructor && exec->newTarget() != exec->callee()) {
+ JSValue prototype = exec->newTarget().get(exec, exec->propertyNames().prototype);
+ structure = Structure::createSubclassStructure(exec->vm(), structure, prototype);
+ }
+ return structure;
+}
+
</ins><span class="cx"> // ECMA 15.10.4
</span><span class="cx"> JSObject* constructRegExp(ExecState* exec, JSGlobalObject* globalObject, const ArgList& args, bool callAsConstructor)
</span><span class="cx"> {
</span><span class="lines">@@ -254,7 +265,8 @@
</span><span class="cx"> // If called as a function, this just returns the first argument (see 15.10.3.1).
</span><span class="cx"> if (callAsConstructor) {
</span><span class="cx"> RegExp* regExp = static_cast<RegExpObject*>(asObject(arg0))->regExp();
</span><del>- return RegExpObject::create(exec->vm(), globalObject->regExpStructure(), regExp);
</del><ins>+
+ return RegExpObject::create(exec->vm(), getRegExpStructure(exec, globalObject, callAsConstructor), regExp);
</ins><span class="cx"> }
</span><span class="cx"> return asObject(arg0);
</span><span class="cx"> }
</span><span class="lines">@@ -276,7 +288,8 @@
</span><span class="cx"> RegExp* regExp = RegExp::create(vm, pattern, flags);
</span><span class="cx"> if (!regExp->isValid())
</span><span class="cx"> return vm.throwException(exec, createSyntaxError(exec, regExp->errorMessage()));
</span><del>- return RegExpObject::create(vm, globalObject->regExpStructure(), regExp);
</del><ins>+
+ return RegExpObject::create(vm, getRegExpStructure(exec, globalObject, callAsConstructor), regExp);
</ins><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> static EncodedJSValue JSC_HOST_CALL constructWithRegExpConstructor(ExecState* exec)
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreruntimeSetConstructorcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/runtime/SetConstructor.cpp (194642 => 194643)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/runtime/SetConstructor.cpp 2016-01-06 18:23:24 UTC (rev 194642)
+++ trunk/Source/JavaScriptCore/runtime/SetConstructor.cpp 2016-01-06 18:25:01 UTC (rev 194643)
</span><span class="lines">@@ -1,5 +1,5 @@
</span><span class="cx"> /*
</span><del>- * Copyright (C) 2013 Apple Inc. All rights reserved.
</del><ins>+ * Copyright (C) 2013, 2016 Apple Inc. All rights reserved.
</ins><span class="cx"> *
</span><span class="cx"> * Redistribution and use in source and binary forms, with or without
</span><span class="cx"> * modification, are permitted provided that the following conditions
</span><span class="lines">@@ -54,8 +54,14 @@
</span><span class="cx">
</span><span class="cx"> static EncodedJSValue JSC_HOST_CALL constructSet(ExecState* exec)
</span><span class="cx"> {
</span><ins>+ JSValue prototype = JSValue();
+ JSValue newTarget = exec->newTarget();
+
+ if (newTarget != exec->callee())
+ prototype = newTarget.get(exec, exec->propertyNames().prototype);
+
</ins><span class="cx"> JSGlobalObject* globalObject = asInternalFunction(exec->callee())->globalObject();
</span><del>- Structure* setStructure = globalObject->setStructure();
</del><ins>+ Structure* setStructure = Structure::createSubclassStructure(exec->vm(), globalObject->setStructure(), prototype);
</ins><span class="cx"> JSSet* set = JSSet::create(exec, setStructure);
</span><span class="cx"> JSValue iterable = exec->argument(0);
</span><span class="cx"> if (iterable.isUndefinedOrNull())
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoretestses6yaml"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/tests/es6.yaml (194642 => 194643)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/tests/es6.yaml 2016-01-06 18:23:24 UTC (rev 194642)
+++ trunk/Source/JavaScriptCore/tests/es6.yaml 2016-01-06 18:25:01 UTC (rev 194643)
</span><span class="lines">@@ -1087,7 +1087,7 @@
</span><span class="cx"> - path: es6/RegExp.prototype_properties_RegExp[Symbol.species].js
</span><span class="cx"> cmd: runES6 :fail
</span><span class="cx"> - path: es6/RegExp_is_subclassable_correct_prototype_chain.js
</span><del>- cmd: runES6 :fail
</del><ins>+ cmd: runES6 :normal
</ins><span class="cx"> - path: es6/RegExp_y_and_u_flags_u_flag.js
</span><span class="cx"> cmd: runES6 :fail
</span><span class="cx"> - path: es6/RegExp_y_and_u_flags_u_flag_Unicode_code_point_escapes.js
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoretestsstressclasssubclassingmiscjs"></a>
<div class="addfile"><h4>Added: trunk/Source/JavaScriptCore/tests/stress/class-subclassing-misc.js (0 => 194643)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/tests/stress/class-subclassing-misc.js (rev 0)
+++ trunk/Source/JavaScriptCore/tests/stress/class-subclassing-misc.js 2016-01-06 18:25:01 UTC (rev 194643)
</span><span class="lines">@@ -0,0 +1,34 @@
</span><ins>+// This file tests subclassing various misc constructors.
+
+class B extends Boolean { }
+class N extends Number { }
+class M extends Map { }
+class R extends RegExp { }
+class S extends Set { }
+
+function test() {
+
+ b = new B(true);
+ if (!(b instanceof Boolean && b instanceof B))
+ throw "b has incorrect prototype chain";
+
+ n = new N(10);
+ if (!(n instanceof Number && n instanceof N))
+ throw "n has incorrect prototype chain";
+
+ m = new M();
+ if (!(m instanceof Map && m instanceof M))
+ throw "m has incorrect prototype chain";
+
+ r = new R("foo");
+ if (!(r instanceof RegExp && r instanceof R))
+ throw "r has incorrect prototype chain";
+
+ s = new S();
+ if (!(s instanceof Set && s instanceof S))
+ throw "s has incorrect prototype chain";
+}
+noInline(test);
+
+for(i = 0; i < 10000; i++)
+ test();
</ins></span></pre>
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