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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/203846">203846</a></dd>
<dt>Author</dt> <dd>cdumez@apple.com</dd>
<dt>Date</dt> <dd>2016-07-28 15:17:49 -0700 (Thu, 28 Jul 2016)</dd>
</dl>
<h3>Log Message</h3>
<pre>2 first parameters to window.postMessage() should be mandatory
https://bugs.webkit.org/show_bug.cgi?id=160319
Reviewed by Darin Adler.
LayoutTests/imported/w3c:
Rebaseline W3C test now that more checks are passing.
* web-platform-tests/html/dom/interfaces-expected.txt:
Source/WebCore:
2 first parameters to window.postMessage() should be mandatory:
- https://html.spec.whatwg.org/multipage/browsers.html#the-window-object
Firefox and Chrome agree with the specification.
No new tests, rebaselined existing test.
* bindings/js/JSDOMWindowCustom.cpp:
(WebCore::handlePostMessage):</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkLayoutTestsimportedw3cChangeLog">trunk/LayoutTests/imported/w3c/ChangeLog</a></li>
<li><a href="#trunkLayoutTestsimportedw3cwebplatformtestshtmldominterfacesexpectedtxt">trunk/LayoutTests/imported/w3c/web-platform-tests/html/dom/interfaces-expected.txt</a></li>
<li><a href="#trunkSourceWebCoreChangeLog">trunk/Source/WebCore/ChangeLog</a></li>
<li><a href="#trunkSourceWebCorebindingsjsJSDOMWindowCustomcpp">trunk/Source/WebCore/bindings/js/JSDOMWindowCustom.cpp</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkLayoutTestsimportedw3cChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/imported/w3c/ChangeLog (203845 => 203846)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/imported/w3c/ChangeLog 2016-07-28 22:05:49 UTC (rev 203845)
+++ trunk/LayoutTests/imported/w3c/ChangeLog 2016-07-28 22:17:49 UTC (rev 203846)
</span><span class="lines">@@ -1,5 +1,16 @@
</span><span class="cx"> 2016-07-28 Chris Dumez <cdumez@apple.com>
</span><span class="cx">
</span><ins>+ 2 first parameters to window.postMessage() should be mandatory
+ https://bugs.webkit.org/show_bug.cgi?id=160319
+
+ Reviewed by Darin Adler.
+
+ Rebaseline W3C test now that more checks are passing.
+
+ * web-platform-tests/html/dom/interfaces-expected.txt:
+
+2016-07-28 Chris Dumez <cdumez@apple.com>
+
</ins><span class="cx"> First parameter to canvas.getContext() / probablySupportsContext() should be mandatory
</span><span class="cx"> https://bugs.webkit.org/show_bug.cgi?id=160312
</span><span class="cx">
</span></span></pre></div>
<a id="trunkLayoutTestsimportedw3cwebplatformtestshtmldominterfacesexpectedtxt"></a>
<div class="modfile"><h4>Modified: trunk/LayoutTests/imported/w3c/web-platform-tests/html/dom/interfaces-expected.txt (203845 => 203846)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/LayoutTests/imported/w3c/web-platform-tests/html/dom/interfaces-expected.txt 2016-07-28 22:05:49 UTC (rev 203845)
+++ trunk/LayoutTests/imported/w3c/web-platform-tests/html/dom/interfaces-expected.txt 2016-07-28 22:17:49 UTC (rev 203846)
</span><span class="lines">@@ -5322,9 +5322,7 @@
</span><span class="cx"> PASS Window interface: window must inherit property "showModalDialog" with the proper type (34)
</span><span class="cx"> PASS Window interface: calling showModalDialog(DOMString,any) on window with too few arguments must throw TypeError
</span><span class="cx"> PASS Window interface: window must inherit property "postMessage" with the proper type (35)
</span><del>-FAIL Window interface: calling postMessage(any,DOMString,[object Object]) on window with too few arguments must throw TypeError assert_throws: Called with 0 arguments function "function () {
- fn.apply(obj, args);
- }" threw object "SyntaxError (DOM Exception 12): The string did not match ..." ("SyntaxError") expected object "TypeError" ("TypeError")
</del><ins>+PASS Window interface: calling postMessage(any,DOMString,[object Object]) on window with too few arguments must throw TypeError
</ins><span class="cx"> PASS Window interface: window must inherit property "captureEvents" with the proper type (36)
</span><span class="cx"> PASS Window interface: window must inherit property "releaseEvents" with the proper type (37)
</span><span class="cx"> PASS Window interface: window must inherit property "onabort" with the proper type (38)
</span></span></pre></div>
<a id="trunkSourceWebCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/ChangeLog (203845 => 203846)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/ChangeLog 2016-07-28 22:05:49 UTC (rev 203845)
+++ trunk/Source/WebCore/ChangeLog 2016-07-28 22:17:49 UTC (rev 203846)
</span><span class="lines">@@ -1,5 +1,22 @@
</span><span class="cx"> 2016-07-28 Chris Dumez <cdumez@apple.com>
</span><span class="cx">
</span><ins>+ 2 first parameters to window.postMessage() should be mandatory
+ https://bugs.webkit.org/show_bug.cgi?id=160319
+
+ Reviewed by Darin Adler.
+
+ 2 first parameters to window.postMessage() should be mandatory:
+ - https://html.spec.whatwg.org/multipage/browsers.html#the-window-object
+
+ Firefox and Chrome agree with the specification.
+
+ No new tests, rebaselined existing test.
+
+ * bindings/js/JSDOMWindowCustom.cpp:
+ (WebCore::handlePostMessage):
+
+2016-07-28 Chris Dumez <cdumez@apple.com>
+
</ins><span class="cx"> First parameter to canvas.getContext() / probablySupportsContext() should be mandatory
</span><span class="cx"> https://bugs.webkit.org/show_bug.cgi?id=160312
</span><span class="cx">
</span></span></pre></div>
<a id="trunkSourceWebCorebindingsjsJSDOMWindowCustomcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebCore/bindings/js/JSDOMWindowCustom.cpp (203845 => 203846)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebCore/bindings/js/JSDOMWindowCustom.cpp 2016-07-28 22:05:49 UTC (rev 203845)
+++ trunk/Source/WebCore/bindings/js/JSDOMWindowCustom.cpp 2016-07-28 22:17:49 UTC (rev 203846)
</span><span class="lines">@@ -518,6 +518,9 @@
</span><span class="cx">
</span><span class="cx"> static JSValue handlePostMessage(DOMWindow& impl, ExecState& state)
</span><span class="cx"> {
</span><ins>+ if (UNLIKELY(state.argumentCount() < 2))
+ return state.vm().throwException(&state, createNotEnoughArgumentsError(&state));
+
</ins><span class="cx"> MessagePortArray messagePorts;
</span><span class="cx"> ArrayBufferArray arrayBuffers;
</span><span class="cx">
</span><span class="lines">@@ -530,7 +533,7 @@
</span><span class="cx"> int targetOriginArgIndex = 1;
</span><span class="cx"> if (state.argumentCount() > 2) {
</span><span class="cx"> int transferablesArgIndex = 2;
</span><del>- if (state.argument(2).isString()) {
</del><ins>+ if (state.uncheckedArgument(2).isString()) {
</ins><span class="cx"> targetOriginArgIndex = 2;
</span><span class="cx"> transferablesArgIndex = 1;
</span><span class="cx"> }
</span><span class="lines">@@ -539,12 +542,12 @@
</span><span class="cx"> if (state.hadException())
</span><span class="cx"> return jsUndefined();
</span><span class="cx">
</span><del>- auto message = SerializedScriptValue::create(&state, state.argument(0), &messagePorts, &arrayBuffers);
</del><ins>+ auto message = SerializedScriptValue::create(&state, state.uncheckedArgument(0), &messagePorts, &arrayBuffers);
</ins><span class="cx">
</span><span class="cx"> if (state.hadException())
</span><span class="cx"> return jsUndefined();
</span><span class="cx">
</span><del>- String targetOrigin = valueToStringWithUndefinedOrNullCheck(&state, state.argument(targetOriginArgIndex));
</del><ins>+ String targetOrigin = valueToStringWithUndefinedOrNullCheck(&state, state.uncheckedArgument(targetOriginArgIndex));
</ins><span class="cx"> if (state.hadException())
</span><span class="cx"> return jsUndefined();
</span><span class="cx">
</span></span></pre>
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