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<title>[185419] trunk/Source/JavaScriptCore</title>
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<dt>Revision</dt> <dd><a href="http://trac.webkit.org/projects/webkit/changeset/185419">185419</a></dd>
<dt>Author</dt> <dd>commit-queue@webkit.org</dd>
<dt>Date</dt> <dd>2015-06-10 09:43:13 -0700 (Wed, 10 Jun 2015)</dd>
</dl>
<h3>Log Message</h3>
<pre>Unreviewed, rolling out <a href="http://trac.webkit.org/projects/webkit/changeset/185414">r185414</a>.
https://bugs.webkit.org/show_bug.cgi?id=145844
broke debug and jsc tests (Requested by alexchristensen on
#webkit).
Reverted changeset:
"JavaScript: Drop the “escaped reserved words as identifiers”
compatibility measure"
https://bugs.webkit.org/show_bug.cgi?id=90678
http://trac.webkit.org/changeset/185414</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkSourceJavaScriptCoreChangeLog">trunk/Source/JavaScriptCore/ChangeLog</a></li>
<li><a href="#trunkSourceJavaScriptCoreparserLexercpp">trunk/Source/JavaScriptCore/parser/Lexer.cpp</a></li>
</ul>
<h3>Removed Paths</h3>
<ul>
<li><a href="#trunkSourceJavaScriptCoretestsstressreservedwordwithescapejs">trunk/Source/JavaScriptCore/tests/stress/reserved-word-with-escape.js</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkSourceJavaScriptCoreChangeLog"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/ChangeLog (185418 => 185419)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/ChangeLog 2015-06-10 15:58:40 UTC (rev 185418)
+++ trunk/Source/JavaScriptCore/ChangeLog 2015-06-10 16:43:13 UTC (rev 185419)
</span><span class="lines">@@ -1,3 +1,18 @@
</span><ins>+2015-06-10 Commit Queue <commit-queue@webkit.org>
+
+ Unreviewed, rolling out r185414.
+ https://bugs.webkit.org/show_bug.cgi?id=145844
+
+ broke debug and jsc tests (Requested by alexchristensen on
+ #webkit).
+
+ Reverted changeset:
+
+ "JavaScript: Drop the “escaped reserved words as identifiers”
+ compatibility measure"
+ https://bugs.webkit.org/show_bug.cgi?id=90678
+ http://trac.webkit.org/changeset/185414
+
</ins><span class="cx"> 2015-06-10 Yusuke Suzuki <utatane.tea@gmail.com>
</span><span class="cx">
</span><span class="cx"> JavaScript: Drop the “escaped reserved words as identifiers” compatibility measure
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoreparserLexercpp"></a>
<div class="modfile"><h4>Modified: trunk/Source/JavaScriptCore/parser/Lexer.cpp (185418 => 185419)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/parser/Lexer.cpp 2015-06-10 15:58:40 UTC (rev 185418)
+++ trunk/Source/JavaScriptCore/parser/Lexer.cpp 2015-06-10 16:43:13 UTC (rev 185419)
</span><span class="lines">@@ -1040,6 +1040,7 @@
</span><span class="cx">
</span><span class="cx"> template<typename CharacterType> template<bool shouldCreateIdentifier> JSTokenType Lexer<CharacterType>::parseIdentifierSlowCase(JSTokenData* tokenData, unsigned lexerFlags, bool strictMode)
</span><span class="cx"> {
</span><ins>+ const ptrdiff_t remaining = m_codeEnd - m_code;
</ins><span class="cx"> auto identifierStart = currentSourcePtr();
</span><span class="cx"> bool bufferRequired = false;
</span><span class="cx">
</span><span class="lines">@@ -1085,13 +1086,18 @@
</span><span class="cx"> } else
</span><span class="cx"> tokenData->ident = nullptr;
</span><span class="cx">
</span><del>- if (LIKELY(!(lexerFlags & LexerFlagsIgnoreReservedWords))) {
</del><ins>+ if (LIKELY(!bufferRequired && !(lexerFlags & LexerFlagsIgnoreReservedWords))) {
</ins><span class="cx"> ASSERT(shouldCreateIdentifier);
</span><del>- const HashTableValue* entry = m_vm->keywords->getKeyword(*ident);
- if (!entry)
- return IDENT;
- JSTokenType token = static_cast<JSTokenType>(entry->lexerValue());
- return (token != RESERVED_IF_STRICT) || strictMode ? token : IDENT;
</del><ins>+ // Keywords must not be recognized if there was an \uXXXX in the identifier.
+ if (remaining < maxTokenLength) {
+ const HashTableValue* entry = m_vm->keywords->getKeyword(*ident);
+ ASSERT((remaining < maxTokenLength) || !entry);
+ if (!entry)
+ return IDENT;
+ JSTokenType token = static_cast<JSTokenType>(entry->lexerValue());
+ return (token != RESERVED_IF_STRICT) || strictMode ? token : IDENT;
+ }
+ return IDENT;
</ins><span class="cx"> }
</span><span class="cx">
</span><span class="cx"> m_buffer16.shrink(0);
</span></span></pre></div>
<a id="trunkSourceJavaScriptCoretestsstressreservedwordwithescapejs"></a>
<div class="delfile"><h4>Deleted: trunk/Source/JavaScriptCore/tests/stress/reserved-word-with-escape.js (185418 => 185419)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/Source/JavaScriptCore/tests/stress/reserved-word-with-escape.js 2015-06-10 15:58:40 UTC (rev 185418)
+++ trunk/Source/JavaScriptCore/tests/stress/reserved-word-with-escape.js 2015-06-10 16:43:13 UTC (rev 185419)
</span><span class="lines">@@ -1,141 +0,0 @@
</span><del>-function testSyntax(script) {
- try {
- eval(script);
- } catch (error) {
- if (error instanceof SyntaxError)
- throw new Error("Bad error: " + String(error));
- }
-}
-
-function testSyntaxError(script, message) {
- var error = null;
- try {
- eval(script);
- } catch (e) {
- error = e;
- }
- if (!error)
- throw new Error("Expected syntax error not thrown");
-
- if (String(error) !== message)
- throw new Error("Bad error: " + String(error));
-}
-
-testSyntax("var cocoa");
-testSyntax("var c\u006fcoa");
-
-testSyntaxError(String.raw`var var`, String.raw`SyntaxError: Cannot use the keyword 'var' as a variable name.`);
-testSyntaxError(String.raw`var v\u0061r`, String.raw`SyntaxError: Cannot use the keyword 'v\u0061r' as a variable name.`);
-testSyntaxError(String.raw`var v\u{0061}r`, String.raw`SyntaxError: Cannot use the keyword 'v\u{0061}r' as a variable name.`);
-
-testSyntaxError(String.raw`var var = 2000000;`, String.raw`SyntaxError: Cannot use the keyword 'var' as a variable name.`);
-testSyntaxError(String.raw`var v\u0061r = 2000000;`, String.raw`SyntaxError: Cannot use the keyword 'v\u0061r' as a variable name.`);
-testSyntaxError(String.raw`var v\u{0061}r = 2000000`, String.raw`SyntaxError: Cannot use the keyword 'v\u{0061}r' as a variable name.`);
-
-testSyntaxError(String.raw`var {var} = obj)`, String.raw`SyntaxError: Cannot use abbreviated deconstruction syntax for keyword 'var'.`);
-testSyntaxError(String.raw`var {v\u0061r} = obj`, String.raw`SyntaxError: Cannot use abbreviated deconstruction syntax for keyword 'var'.`);
-testSyntaxError(String.raw`var {v\u{0061}r} = obj`, String.raw`SyntaxError: Cannot use abbreviated deconstruction syntax for keyword 'var'.`);
-
-testSyntaxError(String.raw`var {var:var} = obj)`, String.raw`SyntaxError: Cannot use the keyword 'var' as a variable name.`);
-testSyntaxError(String.raw`var {var:v\u0061r} = obj`, String.raw`SyntaxError: Cannot use the keyword 'v\u0061r' as a variable name.`);
-testSyntaxError(String.raw`var {var:v\u{0061}r} = obj`, String.raw`SyntaxError: Cannot use the keyword 'v\u{0061}r' as a variable name.`);
-
-testSyntaxError(String.raw`var [var] = obj`, String.raw`SyntaxError: Cannot use the keyword 'var' as a variable name.`);
-testSyntaxError(String.raw`var [v\u0061r] = obj`, String.raw`SyntaxError: Cannot use the keyword 'v\u0061r' as a variable name.`);
-testSyntaxError(String.raw`var [v\u{0061}r] = obj`, String.raw`SyntaxError: Cannot use the keyword 'v\u{0061}r' as a variable name.`);
-
-testSyntaxError(String.raw`[var] = obj`, String.raw`SyntaxError: Unexpected keyword 'var'`);
-testSyntaxError(String.raw`[v\u0061r] = obj`, String.raw`SyntaxError: Unexpected keyword 'v\u0061r'`);
-testSyntaxError(String.raw`[v\u{0061}r] = obj`, String.raw`SyntaxError: Unexpected keyword 'v\u{0061}r'`);
-
-testSyntaxError(String.raw`function var() { }`, String.raw`SyntaxError: Cannot use the keyword 'var' as a function name.`);
-testSyntaxError(String.raw`function v\u0061r() { }`, String.raw`SyntaxError: Cannot use the keyword 'v\u0061r' as a function name.`);
-testSyntaxError(String.raw`function v\u{0061}r() { }`, String.raw`SyntaxError: Cannot use the keyword 'v\u{0061}r' as a function name.`);
-
-testSyntaxError(String.raw`function a(var) { }`, String.raw`SyntaxError: Cannot use the keyword 'var' as a variable name.`);
-testSyntaxError(String.raw`function a(v\u0061r) { }`, String.raw`SyntaxError: Cannot use the keyword 'v\u0061r' as a variable name.`);
-testSyntaxError(String.raw`function a(v\u{0061}r) { }`, String.raw`SyntaxError: Cannot use the keyword 'v\u{0061}r' as a variable name.`);
-
-testSyntaxError(String.raw`function a({var}) { }`, String.raw`SyntaxError: Cannot use abbreviated deconstruction syntax for keyword 'var'.`);
-testSyntaxError(String.raw`function a({v\u0061r}) { }`, String.raw`SyntaxError: Cannot use abbreviated deconstruction syntax for keyword 'var'.`);
-testSyntaxError(String.raw`function a({v\u{0061}r}) { }`, String.raw`SyntaxError: Cannot use abbreviated deconstruction syntax for keyword 'var'.`);
-
-testSyntaxError(String.raw`function a({var:var}) { }`, String.raw`SyntaxError: Cannot use the keyword 'var' as a variable name.`);
-testSyntaxError(String.raw`function a({var:v\u0061r}) { }`, String.raw`SyntaxError: Cannot use the keyword 'v\u0061r' as a variable name.`);
-testSyntaxError(String.raw`function a({var:v\u{0061}r}) { }`, String.raw`SyntaxError: Cannot use the keyword 'v\u{0061}r' as a variable name.`);
-
-testSyntaxError(String.raw`function a([var]) { }`, String.raw`SyntaxError: Cannot use the keyword 'var' as a variable name.`);
-testSyntaxError(String.raw`function a([v\u0061r]) { }`, String.raw`SyntaxError: Cannot use the keyword 'v\u0061r' as a variable name.`);
-testSyntaxError(String.raw`function a([v\u{0061}r]) { }`, String.raw`SyntaxError: Cannot use the keyword 'v\u{0061}r' as a variable name.`);
-
-testSyntaxError(String.raw`(function var() { })`, String.raw`SyntaxError: Cannot use the keyword 'var' as a function name.`);
-testSyntaxError(String.raw`(function v\u0061r() { })`, String.raw`SyntaxError: Cannot use the keyword 'v\u0061r' as a function name.`);
-testSyntaxError(String.raw`(function v\u{0061}r() { })`, String.raw`SyntaxError: Cannot use the keyword 'v\u{0061}r' as a function name.`);
-
-testSyntaxError(String.raw`(function a(var) { })`, String.raw`SyntaxError: Cannot use the keyword 'var' as a variable name.`);
-testSyntaxError(String.raw`(function a(v\u0061r) { })`, String.raw`SyntaxError: Cannot use the keyword 'v\u0061r' as a variable name.`);
-testSyntaxError(String.raw`(function a(v\u{0061}r) { })`, String.raw`SyntaxError: Cannot use the keyword 'v\u{0061}r' as a variable name.`);
-
-testSyntaxError(String.raw`(function a({var}) { })`, String.raw`SyntaxError: Cannot use abbreviated deconstruction syntax for keyword 'var'.`);
-testSyntaxError(String.raw`(function a({v\u0061r}) { })`, String.raw`SyntaxError: Cannot use abbreviated deconstruction syntax for keyword 'var'.`);
-testSyntaxError(String.raw`(function a({v\u{0061}r}) { })`, String.raw`SyntaxError: Cannot use abbreviated deconstruction syntax for keyword 'var'.`);
-
-testSyntaxError(String.raw`(function a({var:var}) { })`, String.raw`SyntaxError: Cannot use the keyword 'var' as a variable name.`);
-testSyntaxError(String.raw`(function a({var:v\u0061r}) { })`, String.raw`SyntaxError: Cannot use the keyword 'v\u0061r' as a variable name.`);
-testSyntaxError(String.raw`(function a({var:v\u{0061}r}) { })`, String.raw`SyntaxError: Cannot use the keyword 'v\u{0061}r' as a variable name.`);
-
-testSyntaxError(String.raw`(function a([var]) { })`, String.raw`SyntaxError: Cannot use the keyword 'var' as a variable name.`);
-testSyntaxError(String.raw`(function a([v\u0061r]) { })`, String.raw`SyntaxError: Cannot use the keyword 'v\u0061r' as a variable name.`);
-testSyntaxError(String.raw`(function a([v\u{0061}r]) { })`, String.raw`SyntaxError: Cannot use the keyword 'v\u{0061}r' as a variable name.`);
-
-testSyntaxError(String.raw`(function a([{var}]) { })`, String.raw`SyntaxError: Cannot use abbreviated deconstruction syntax for keyword 'var'.`);
-testSyntaxError(String.raw`(function a([{v\u0061r}]) { })`, String.raw`SyntaxError: Cannot use abbreviated deconstruction syntax for keyword 'var'.`);
-testSyntaxError(String.raw`(function a([{v\u{0061}r}]) { })`, String.raw`SyntaxError: Cannot use abbreviated deconstruction syntax for keyword 'var'.`);
-
-testSyntaxError(String.raw`(function a([{var:var}]) { })`, String.raw`SyntaxError: Cannot use the keyword 'var' as a variable name.`);
-testSyntaxError(String.raw`(function a([{var:v\u0061r}]) { })`, String.raw`SyntaxError: Cannot use the keyword 'v\u0061r' as a variable name.`);
-testSyntaxError(String.raw`(function a([{var:v\u{0061}r}]) { })`, String.raw`SyntaxError: Cannot use the keyword 'v\u{0061}r' as a variable name.`);
-
-testSyntaxError(String.raw`(function a([[var]]) { })`, String.raw`SyntaxError: Cannot use the keyword 'var' as a variable name.`);
-testSyntaxError(String.raw`(function a([[v\u0061r]]) { })`, String.raw`SyntaxError: Cannot use the keyword 'v\u0061r' as a variable name.`);
-testSyntaxError(String.raw`(function a([[v\u{0061}r]]) { })`, String.raw`SyntaxError: Cannot use the keyword 'v\u{0061}r' as a variable name.`);
-
-testSyntaxError(String.raw`(function a({ hello: {var}}) { })`, String.raw`SyntaxError: Cannot use abbreviated deconstruction syntax for keyword 'var'.`);
-testSyntaxError(String.raw`(function a({ hello: {v\u0061r}}) { })`, String.raw`SyntaxError: Cannot use abbreviated deconstruction syntax for keyword 'var'.`);
-testSyntaxError(String.raw`(function a({ hello: {v\u{0061}r}}) { })`, String.raw`SyntaxError: Cannot use abbreviated deconstruction syntax for keyword 'var'.`);
-
-testSyntaxError(String.raw`(function a({ hello: {var:var}}) { })`, String.raw`SyntaxError: Cannot use the keyword 'var' as a variable name.`);
-testSyntaxError(String.raw`(function a({ hello: {var:v\u0061r}}) { })`, String.raw`SyntaxError: Cannot use the keyword 'v\u0061r' as a variable name.`);
-testSyntaxError(String.raw`(function a({ hello: {var:v\u{0061}r}}) { })`, String.raw`SyntaxError: Cannot use the keyword 'v\u{0061}r' as a variable name.`);
-
-testSyntaxError(String.raw`(function a({ hello: [var]}) { })`, String.raw`SyntaxError: Cannot use the keyword 'var' as a variable name.`);
-testSyntaxError(String.raw`(function a({ hello: [v\u0061r]}) { })`, String.raw`SyntaxError: Cannot use the keyword 'v\u0061r' as a variable name.`);
-testSyntaxError(String.raw`(function a({ hello: [v\u{0061}r]}) { })`, String.raw`SyntaxError: Cannot use the keyword 'v\u{0061}r' as a variable name.`);
-
-testSyntaxError(String.raw`(function a({ 0: {var} }) { })`, String.raw`SyntaxError: Cannot use abbreviated deconstruction syntax for keyword 'var'.`);
-testSyntaxError(String.raw`(function a({ 0: {v\u0061r}}) { })`, String.raw`SyntaxError: Cannot use abbreviated deconstruction syntax for keyword 'var'.`);
-testSyntaxError(String.raw`(function a({ 0: {v\u{0061}r}}) { })`, String.raw`SyntaxError: Cannot use abbreviated deconstruction syntax for keyword 'var'.`);
-
-testSyntaxError(String.raw`(function a({ 0: {var:var}}) { })`, String.raw`SyntaxError: Cannot use the keyword 'var' as a variable name.`);
-testSyntaxError(String.raw`(function a({ 0: {var:v\u0061r}}) { })`, String.raw`SyntaxError: Cannot use the keyword 'v\u0061r' as a variable name.`);
-testSyntaxError(String.raw`(function a({ 0: {var:v\u{0061}r}}) { })`, String.raw`SyntaxError: Cannot use the keyword 'v\u{0061}r' as a variable name.`);
-
-testSyntaxError(String.raw`(function a({ 0: {value:var}}) { })`, String.raw`SyntaxError: Cannot use the keyword 'var' as a variable name.`);
-testSyntaxError(String.raw`(function a({ 0: {value:v\u0061r}}) { })`, String.raw`SyntaxError: Cannot use the keyword 'v\u0061r' as a variable name.`);
-testSyntaxError(String.raw`(function a({ 0: {value:v\u{0061}r}}) { })`, String.raw`SyntaxError: Cannot use the keyword 'v\u{0061}r' as a variable name.`);
-
-testSyntaxError(String.raw`(function a({ 0: [var]}) { })`, String.raw`SyntaxError: Cannot use the keyword 'var' as a variable name.`);
-testSyntaxError(String.raw`(function a({ 0: [v\u0061r]}) { })`, String.raw`SyntaxError: Cannot use the keyword 'v\u0061r' as a variable name.`);
-testSyntaxError(String.raw`(function a({ 0: [v\u{0061}r]}) { })`, String.raw`SyntaxError: Cannot use the keyword 'v\u{0061}r' as a variable name.`);
-
-testSyntaxError(String.raw`try { } catch(var) { }`, String.raw`SyntaxError: Cannot use the keyword 'var' as a catch variable name.`);
-testSyntaxError(String.raw`try { } catch(v\u0061r) { }`, String.raw`SyntaxError: Cannot use the keyword 'v\u0061r' as a catch variable name.`);
-testSyntaxError(String.raw`try { } catch(v\u{0061}r) { }`, String.raw`SyntaxError: Cannot use the keyword 'v\u{0061}r' as a catch variable name.`);
-
-testSyntaxError(String.raw`class var { }`, String.raw`SyntaxError: Cannot use the keyword 'var' as a class name.`);
-testSyntaxError(String.raw`class v\u0061r { }`, String.raw`SyntaxError: Cannot use the keyword 'v\u0061r' as a class name.`);
-testSyntaxError(String.raw`class v\u{0061}r { }`, String.raw`SyntaxError: Cannot use the keyword 'v\u{0061}r' as a class name.`);
-
-// Allowed in non-keyword aware context.
-testSyntax(String.raw`({ v\u0061r: 'Cocoa' })`);
-testSyntax(String.raw`({ v\u{0061}r: 'Cocoa' })`);
</del></span></pre>
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