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<div id="msg">
<dl class="meta">
<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/183977">183977</a></dd>
<dt>Author</dt> <dd>commit-queue@webkit.org</dd>
<dt>Date</dt> <dd>2015-05-07 20:27:11 -0700 (Thu, 07 May 2015)</dd>
</dl>

<h3>Log Message</h3>
<pre>Unreviewed, rolling out <a href="http://trac.webkit.org/projects/webkit/changeset/183961">r183961</a>.
https://bugs.webkit.org/show_bug.cgi?id=144784

Broke js/dom/JSON-stringify.html (Requested by kling on
#webkit).

Reverted changeset:

&quot;Optimize serialization of quoted JSON strings.&quot;
https://bugs.webkit.org/show_bug.cgi?id=144754
http://trac.webkit.org/changeset/183961</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceJavaScriptCoreChangeLog">trunk/Source/JavaScriptCore/ChangeLog</a></li>
<li><a href="#trunkSourceJavaScriptCorebytecompilerNodesCodegencpp">trunk/Source/JavaScriptCore/bytecompiler/NodesCodegen.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoreruntimeJSONObjectcpp">trunk/Source/JavaScriptCore/runtime/JSONObject.cpp</a></li>
<li><a href="#trunkSourceJavaScriptCoreruntimeJSONObjecth">trunk/Source/JavaScriptCore/runtime/JSONObject.h</a></li>
<li><a href="#trunkSourceWTFChangeLog">trunk/Source/WTF/ChangeLog</a></li>
<li><a href="#trunkSourceWTFwtftextStringBuildercpp">trunk/Source/WTF/wtf/text/StringBuilder.cpp</a></li>
<li><a href="#trunkSourceWTFwtftextStringBuilderh">trunk/Source/WTF/wtf/text/StringBuilder.h</a></li>
<li><a href="#trunkSourceWebKit2ChangeLog">trunk/Source/WebKit2/ChangeLog</a></li>
<li><a href="#trunkSourceWebKit2NetworkProcesscacheNetworkCacheEntrycpp">trunk/Source/WebKit2/NetworkProcess/cache/NetworkCacheEntry.cpp</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceJavaScriptCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/ChangeLog (183976 => 183977)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/ChangeLog        2015-05-08 02:59:37 UTC (rev 183976)
+++ trunk/Source/JavaScriptCore/ChangeLog        2015-05-08 03:27:11 UTC (rev 183977)
</span><span class="lines">@@ -1,3 +1,17 @@
</span><ins>+2015-05-07  Commit Queue  &lt;commit-queue@webkit.org&gt;
+
+        Unreviewed, rolling out r183961.
+        https://bugs.webkit.org/show_bug.cgi?id=144784
+
+        Broke js/dom/JSON-stringify.html (Requested by kling on
+        #webkit).
+
+        Reverted changeset:
+
+        &quot;Optimize serialization of quoted JSON strings.&quot;
+        https://bugs.webkit.org/show_bug.cgi?id=144754
+        http://trac.webkit.org/changeset/183961
+
</ins><span class="cx"> 2015-05-07  Filip Pizlo  &lt;fpizlo@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         GC has trouble with pathologically large array allocations
</span></span></pre></div>
<a id="trunkSourceJavaScriptCorebytecompilerNodesCodegencpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/bytecompiler/NodesCodegen.cpp (183976 => 183977)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/bytecompiler/NodesCodegen.cpp        2015-05-08 02:59:37 UTC (rev 183976)
+++ trunk/Source/JavaScriptCore/bytecompiler/NodesCodegen.cpp        2015-05-08 03:27:11 UTC (rev 183977)
</span><span class="lines">@@ -3087,7 +3087,7 @@
</span><span class="cx">     builder.append('{');
</span><span class="cx">     for (size_t i = 0; i &lt; m_targetPatterns.size(); i++) {
</span><span class="cx">         if (m_targetPatterns[i].wasString)
</span><del>-            builder.appendQuotedJSONString(m_targetPatterns[i].propertyName.string());
</del><ins>+            appendQuotedJSONStringToBuilder(builder, m_targetPatterns[i].propertyName.string());
</ins><span class="cx">         else
</span><span class="cx">             builder.append(m_targetPatterns[i].propertyName.string());
</span><span class="cx">         builder.append(':');
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreruntimeJSONObjectcpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/runtime/JSONObject.cpp (183976 => 183977)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/runtime/JSONObject.cpp        2015-05-08 02:59:37 UTC (rev 183976)
+++ trunk/Source/JavaScriptCore/runtime/JSONObject.cpp        2015-05-08 03:27:11 UTC (rev 183977)
</span><span class="lines">@@ -107,6 +107,8 @@
</span><span class="cx"> 
</span><span class="cx">     friend class Holder;
</span><span class="cx"> 
</span><ins>+    static void appendQuotedString(StringBuilder&amp;, const String&amp;);
+
</ins><span class="cx">     JSValue toJSON(JSValue, const PropertyNameForFunctionCall&amp;);
</span><span class="cx"> 
</span><span class="cx">     enum StringifyResult { StringifyFailed, StringifySucceeded, StringifyFailedDueToUndefinedValue };
</span><span class="lines">@@ -253,6 +255,72 @@
</span><span class="cx">     return Local&lt;Unknown&gt;(m_exec-&gt;vm(), jsString(m_exec, result.toString()));
</span><span class="cx"> }
</span><span class="cx"> 
</span><ins>+template &lt;typename CharType&gt;
+static void appendStringToStringBuilder(StringBuilder&amp; builder, const CharType* data, int length)
+{
+    for (int i = 0; i &lt; length; ++i) {
+        int start = i;
+        while (i &lt; length &amp;&amp; (data[i] &gt; 0x1F &amp;&amp; data[i] != '&quot;' &amp;&amp; data[i] != '\\'))
+            ++i;
+        builder.append(data + start, i - start);
+        if (i &gt;= length)
+            break;
+        switch (data[i]) {
+        case '\t':
+            builder.append('\\');
+            builder.append('t');
+            break;
+        case '\r':
+            builder.append('\\');
+            builder.append('r');
+            break;
+        case '\n':
+            builder.append('\\');
+            builder.append('n');
+            break;
+        case '\f':
+            builder.append('\\');
+            builder.append('f');
+            break;
+        case '\b':
+            builder.append('\\');
+            builder.append('b');
+            break;
+        case '&quot;':
+            builder.append('\\');
+            builder.append('&quot;');
+            break;
+        case '\\':
+            builder.append('\\');
+            builder.append('\\');
+            break;
+        default:
+            static const char hexDigits[] = &quot;0123456789abcdef&quot;;
+            UChar ch = data[i];
+            LChar hex[] = { '\\', 'u', static_cast&lt;LChar&gt;(hexDigits[(ch &gt;&gt; 12) &amp; 0xF]), static_cast&lt;LChar&gt;(hexDigits[(ch &gt;&gt; 8) &amp; 0xF]), static_cast&lt;LChar&gt;(hexDigits[(ch &gt;&gt; 4) &amp; 0xF]), static_cast&lt;LChar&gt;(hexDigits[ch &amp; 0xF]) };
+            builder.append(hex, WTF_ARRAY_LENGTH(hex));
+            break;
+        }
+    }
+}
+
+void appendQuotedJSONStringToBuilder(StringBuilder&amp; builder, const String&amp; message)
+{
+    builder.append('&quot;');
+
+    if (message.is8Bit())
+        appendStringToStringBuilder(builder, message.characters8(), message.length());
+    else
+        appendStringToStringBuilder(builder, message.characters16(), message.length());
+
+    builder.append('&quot;');
+}
+
+void Stringifier::appendQuotedString(StringBuilder&amp; builder, const String&amp; value)
+{
+    appendQuotedJSONStringToBuilder(builder, value);
+}
+
</ins><span class="cx"> inline JSValue Stringifier::toJSON(JSValue value, const PropertyNameForFunctionCall&amp; propertyName)
</span><span class="cx"> {
</span><span class="cx">     ASSERT(!m_exec-&gt;hadException());
</span><span class="lines">@@ -317,7 +385,7 @@
</span><span class="cx"> 
</span><span class="cx">     String stringValue;
</span><span class="cx">     if (value.getString(m_exec, stringValue)) {
</span><del>-        builder.appendQuotedJSONString(stringValue);
</del><ins>+        appendQuotedString(builder, stringValue);
</ins><span class="cx">         return StringifySucceeded;
</span><span class="cx">     }
</span><span class="cx"> 
</span><span class="lines">@@ -488,7 +556,7 @@
</span><span class="cx">         stringifier.startNewLine(builder);
</span><span class="cx"> 
</span><span class="cx">         // Append the property name.
</span><del>-        builder.appendQuotedJSONString(propertyName.string());
</del><ins>+        appendQuotedString(builder, propertyName.string());
</ins><span class="cx">         builder.append(':');
</span><span class="cx">         if (stringifier.willIndent())
</span><span class="cx">             builder.append(' ');
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreruntimeJSONObjecth"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/runtime/JSONObject.h (183976 => 183977)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/runtime/JSONObject.h        2015-05-08 02:59:37 UTC (rev 183976)
+++ trunk/Source/JavaScriptCore/runtime/JSONObject.h        2015-05-08 03:27:11 UTC (rev 183977)
</span><span class="lines">@@ -62,6 +62,8 @@
</span><span class="cx"> JS_EXPORT_PRIVATE JSValue JSONParse(ExecState*, const String&amp;);
</span><span class="cx"> JS_EXPORT_PRIVATE String JSONStringify(ExecState*, JSValue, unsigned indent);
</span><span class="cx"> 
</span><ins>+JS_EXPORT_PRIVATE void appendQuotedJSONStringToBuilder(StringBuilder&amp;, const String&amp;);
+
</ins><span class="cx">     
</span><span class="cx"> } // namespace JSC
</span><span class="cx"> 
</span></span></pre></div>
<a id="trunkSourceWTFChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WTF/ChangeLog (183976 => 183977)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WTF/ChangeLog        2015-05-08 02:59:37 UTC (rev 183976)
+++ trunk/Source/WTF/ChangeLog        2015-05-08 03:27:11 UTC (rev 183977)
</span><span class="lines">@@ -1,3 +1,17 @@
</span><ins>+2015-05-07  Commit Queue  &lt;commit-queue@webkit.org&gt;
+
+        Unreviewed, rolling out r183961.
+        https://bugs.webkit.org/show_bug.cgi?id=144784
+
+        Broke js/dom/JSON-stringify.html (Requested by kling on
+        #webkit).
+
+        Reverted changeset:
+
+        &quot;Optimize serialization of quoted JSON strings.&quot;
+        https://bugs.webkit.org/show_bug.cgi?id=144754
+        http://trac.webkit.org/changeset/183961
+
</ins><span class="cx"> 2015-05-07  Andreas Kling  &lt;akling@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         Optimize serialization of quoted JSON strings.
</span></span></pre></div>
<a id="trunkSourceWTFwtftextStringBuildercpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WTF/wtf/text/StringBuilder.cpp (183976 => 183977)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WTF/wtf/text/StringBuilder.cpp        2015-05-08 02:59:37 UTC (rev 183976)
+++ trunk/Source/WTF/wtf/text/StringBuilder.cpp        2015-05-08 03:27:11 UTC (rev 183977)
</span><span class="lines">@@ -27,9 +27,7 @@
</span><span class="cx"> #include &quot;config.h&quot;
</span><span class="cx"> #include &quot;StringBuilder.h&quot;
</span><span class="cx"> 
</span><del>-#include &quot;ASCIICType.h&quot;
</del><span class="cx"> #include &quot;IntegerToStringConversion.h&quot;
</span><del>-#include &quot;MathExtras.h&quot;
</del><span class="cx"> #include &quot;WTFString.h&quot;
</span><span class="cx"> #include &lt;wtf/dtoa.h&gt;
</span><span class="cx"> 
</span><span class="lines">@@ -362,89 +360,4 @@
</span><span class="cx">     }
</span><span class="cx"> }
</span><span class="cx"> 
</span><del>-template &lt;typename OutputCharacterType, typename InputCharacterType&gt;
-static void appendQuotedJSONStringInternal(OutputCharacterType*&amp; output, const InputCharacterType* input, unsigned length)
-{
-    for (const InputCharacterType* end = input + length; input != end; ++input) {
-        if (*input &gt; 0x1F &amp;&amp; *input != '&quot;' &amp;&amp; *input != '\\') {
-            *output++ = *input;
-            continue;
-        }
-        switch (*input) {
-        case '\t':
-            *output++ = '\\';
-            *output++ = 't';
-            break;
-        case '\r':
-            *output++ = '\\';
-            *output++ = 'r';
-            break;
-        case '\n':
-            *output++ = '\\';
-            *output++ = 'n';
-            break;
-        case '\f':
-            *output++ = '\\';
-            *output++ = 'f';
-            break;
-        case '\b':
-            *output++ = '\\';
-            *output++ = 'b';
-            break;
-        case '&quot;':
-            *output++ = '\\';
-            *output++ = '&quot;';
-            break;
-        case '\\':
-            *output++ = '\\';
-            *output++ = '\\';
-            break;
-        default:
-            ASSERT((*input &amp; 0xFF00) == 0);
-            *output++ = '\\';
-            *output++ = 'u';
-            *output++ = '0';
-            *output++ = '0';
-            *output++ = upperNibbleToASCIIHexDigit(*input);
-            *output++ = lowerNibbleToASCIIHexDigit(*input);
-            break;
-        }
-    }
-}
-
-void StringBuilder::appendQuotedJSONString(const String&amp; string)
-{
-    // Make sure we have enough buffer space to append this string without having
-    // to worry about reallocating in the middle.
-    // The 2 is for the '&quot;' quotes on each end.
-    // The 'maximumOutputCharactersPerInputCharacter' is 6 for 16-bit characters
-    // since they may need \uNNNN-style representation. 2 for 8-bit strings.
-    unsigned maximumOutputCharactersPerInputCharacter = string.is8Bit() ? 2 : 6;
-    size_t maximumCapacityRequired = length() + 2 + (string.length() * maximumOutputCharactersPerInputCharacter);
-    RELEASE_ASSERT(maximumCapacityRequired &lt; std::numeric_limits&lt;unsigned&gt;::max());
-
-    if (is8Bit() &amp;&amp; !string.is8Bit())
-        allocateBufferUpConvert(m_bufferCharacters8, roundUpToPowerOfTwo(maximumCapacityRequired));
-    else
-        reserveCapacity(roundUpToPowerOfTwo(maximumCapacityRequired));
-
-    if (is8Bit()) {
-        ASSERT(string.is8Bit());
-        LChar* output = m_bufferCharacters8 + m_length;
-        *output++ = '&quot;';
-        appendQuotedJSONStringInternal(output, string.characters8(), string.length());
-        *output++ = '&quot;';
-        m_length = output - m_bufferCharacters8;
-    } else {
-        UChar* output = m_bufferCharacters16 + m_length;
-        *output++ = '&quot;';
-        if (string.is8Bit())
-            appendQuotedJSONStringInternal(output, string.characters8(), string.length());
-        else
-            appendQuotedJSONStringInternal(output, string.characters16(), string.length());
-        *output++ = '&quot;';
-        m_length = output - m_bufferCharacters16;
-    }
-}
-
</del><span class="cx"> } // namespace WTF
</span></span></pre></div>
<a id="trunkSourceWTFwtftextStringBuilderh"></a>
<div class="modfile"><h4>Modified: trunk/Source/WTF/wtf/text/StringBuilder.h (183976 => 183977)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WTF/wtf/text/StringBuilder.h        2015-05-08 02:59:37 UTC (rev 183976)
+++ trunk/Source/WTF/wtf/text/StringBuilder.h        2015-05-08 03:27:11 UTC (rev 183977)
</span><span class="lines">@@ -159,8 +159,6 @@
</span><span class="cx">         append(U16_TRAIL(c));
</span><span class="cx">     }
</span><span class="cx"> 
</span><del>-    WTF_EXPORT_PRIVATE void appendQuotedJSONString(const String&amp;);
-
</del><span class="cx">     template&lt;unsigned charactersCount&gt;
</span><span class="cx">     ALWAYS_INLINE void appendLiteral(const char (&amp;characters)[charactersCount]) { append(characters, charactersCount - 1); }
</span><span class="cx"> 
</span></span></pre></div>
<a id="trunkSourceWebKit2ChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit2/ChangeLog (183976 => 183977)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/ChangeLog        2015-05-08 02:59:37 UTC (rev 183976)
+++ trunk/Source/WebKit2/ChangeLog        2015-05-08 03:27:11 UTC (rev 183977)
</span><span class="lines">@@ -1,3 +1,17 @@
</span><ins>+2015-05-07  Commit Queue  &lt;commit-queue@webkit.org&gt;
+
+        Unreviewed, rolling out r183961.
+        https://bugs.webkit.org/show_bug.cgi?id=144784
+
+        Broke js/dom/JSON-stringify.html (Requested by kling on
+        #webkit).
+
+        Reverted changeset:
+
+        &quot;Optimize serialization of quoted JSON strings.&quot;
+        https://bugs.webkit.org/show_bug.cgi?id=144754
+        http://trac.webkit.org/changeset/183961
+
</ins><span class="cx"> 2015-05-07  Anders Carlsson  &lt;andersca@apple.com&gt;
</span><span class="cx"> 
</span><span class="cx">         Build fixes.
</span></span></pre></div>
<a id="trunkSourceWebKit2NetworkProcesscacheNetworkCacheEntrycpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/WebKit2/NetworkProcess/cache/NetworkCacheEntry.cpp (183976 => 183977)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/WebKit2/NetworkProcess/cache/NetworkCacheEntry.cpp        2015-05-08 02:59:37 UTC (rev 183976)
+++ trunk/Source/WebKit2/NetworkProcess/cache/NetworkCacheEntry.cpp        2015-05-08 03:27:11 UTC (rev 183977)
</span><span class="lines">@@ -30,6 +30,7 @@
</span><span class="cx"> #include &quot;NetworkCacheCoders.h&quot;
</span><span class="cx"> #include &quot;NetworkCacheDecoder.h&quot;
</span><span class="cx"> #include &quot;NetworkCacheEncoder.h&quot;
</span><ins>+#include &lt;JavaScriptCore/JSONObject.h&gt;
</ins><span class="cx"> #include &lt;WebCore/ResourceRequest.h&gt;
</span><span class="cx"> #include &lt;WebCore/SharedBuffer.h&gt;
</span><span class="cx"> #include &lt;wtf/text/StringBuilder.h&gt;
</span><span class="lines">@@ -158,7 +159,7 @@
</span><span class="cx"> {
</span><span class="cx">     json.appendLiteral(&quot;{\n&quot;);
</span><span class="cx">     json.appendLiteral(&quot;\&quot;hash\&quot;: &quot;);
</span><del>-    json.appendQuotedJSONString(m_key.hashAsString());
</del><ins>+    JSC::appendQuotedJSONStringToBuilder(json, m_key.hashAsString());
</ins><span class="cx">     json.appendLiteral(&quot;,\n&quot;);
</span><span class="cx">     json.appendLiteral(&quot;\&quot;bodySize\&quot;: &quot;);
</span><span class="cx">     json.appendNumber(info.bodySize);
</span><span class="lines">@@ -167,16 +168,16 @@
</span><span class="cx">     json.appendNumber(info.worth);
</span><span class="cx">     json.appendLiteral(&quot;,\n&quot;);
</span><span class="cx">     json.appendLiteral(&quot;\&quot;partition\&quot;: &quot;);
</span><del>-    json.appendQuotedJSONString(m_key.partition());
</del><ins>+    JSC::appendQuotedJSONStringToBuilder(json, m_key.partition());
</ins><span class="cx">     json.appendLiteral(&quot;,\n&quot;);
</span><span class="cx">     json.appendLiteral(&quot;\&quot;timestamp\&quot;: &quot;);
</span><span class="cx">     json.appendNumber(std::chrono::duration_cast&lt;std::chrono::milliseconds&gt;(m_timeStamp.time_since_epoch()).count());
</span><span class="cx">     json.appendLiteral(&quot;,\n&quot;);
</span><span class="cx">     json.appendLiteral(&quot;\&quot;URL\&quot;: &quot;);
</span><del>-    json.appendQuotedJSONString(m_response.url().string());
</del><ins>+    JSC::appendQuotedJSONStringToBuilder(json, m_response.url().string());
</ins><span class="cx">     json.appendLiteral(&quot;,\n&quot;);
</span><span class="cx">     json.appendLiteral(&quot;\&quot;bodyHash\&quot;: &quot;);
</span><del>-    json.appendQuotedJSONString(info.bodyHash);
</del><ins>+    JSC::appendQuotedJSONStringToBuilder(json, info.bodyHash);
</ins><span class="cx">     json.appendLiteral(&quot;,\n&quot;);
</span><span class="cx">     json.appendLiteral(&quot;\&quot;bodyShareCount\&quot;: &quot;);
</span><span class="cx">     json.appendNumber(info.bodyShareCount);
</span><span class="lines">@@ -188,9 +189,9 @@
</span><span class="cx">             json.appendLiteral(&quot;,\n&quot;);
</span><span class="cx">         firstHeader = false;
</span><span class="cx">         json.appendLiteral(&quot;    &quot;);
</span><del>-        json.appendQuotedJSONString(header.key);
</del><ins>+        JSC::appendQuotedJSONStringToBuilder(json, header.key);
</ins><span class="cx">         json.appendLiteral(&quot;: &quot;);
</span><del>-        json.appendQuotedJSONString(header.value);
</del><ins>+        JSC::appendQuotedJSONStringToBuilder(json, header.value);
</ins><span class="cx">     }
</span><span class="cx">     json.appendLiteral(&quot;\n}\n&quot;);
</span><span class="cx">     json.appendLiteral(&quot;}&quot;);
</span></span></pre>
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