<?xml version="1.0" encoding="UTF-8" standalone="yes" ?>
<!DOCTYPE bugzilla SYSTEM "https://bugs.webkit.org/page.cgi?id=bugzilla.dtd">

<bugzilla version="5.0.4.1"
          urlbase="https://bugs.webkit.org/"
          
          maintainer="admin@webkit.org"
>

    <bug>
          <bug_id>136141</bug_id>
          
          <creation_ts>2014-08-21 17:50:02 -0700</creation_ts>
          <short_desc>r171362 accidentally increased the size of InlineCallFrame</short_desc>
          <delta_ts>2014-08-21 22:30:17 -0700</delta_ts>
          <reporter_accessible>1</reporter_accessible>
          <cclist_accessible>1</cclist_accessible>
          <classification_id>1</classification_id>
          <classification>Unclassified</classification>
          <product>WebKit</product>
          <component>JavaScriptCore</component>
          <version>528+ (Nightly build)</version>
          <rep_platform>Unspecified</rep_platform>
          <op_sys>Unspecified</op_sys>
          <bug_status>RESOLVED</bug_status>
          <resolution>FIXED</resolution>
          
          
          <bug_file_loc></bug_file_loc>
          <status_whiteboard></status_whiteboard>
          <keywords></keywords>
          <priority>P2</priority>
          <bug_severity>Normal</bug_severity>
          <target_milestone>---</target_milestone>
          
          
          <everconfirmed>1</everconfirmed>
          <reporter name="Mark Lam">mark.lam</reporter>
          <assigned_to name="Mark Lam">mark.lam</assigned_to>
          <cc>commit-queue</cc>
    
    <cc>fpizlo</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>1030607</commentid>
    <comment_count>0</comment_count>
    <who name="Mark Lam">mark.lam</who>
    <bug_when>2014-08-21 17:50:02 -0700</bug_when>
    <thetext>r171362 increased the size of InlineCallFrame::kind to 2 bits.  This increased the size of InlineCallFrame from 72 to 80 though not intentionally.  The fix is to reduce the size of InlineCallFrame::stackOffset to 29 bits.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1030609</commentid>
    <comment_count>1</comment_count>
      <attachid>236948</attachid>
    <who name="Mark Lam">mark.lam</who>
    <bug_when>2014-08-21 17:54:34 -0700</bug_when>
    <thetext>Created attachment 236948
The patch</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1030611</commentid>
    <comment_count>2</comment_count>
      <attachid>236948</attachid>
    <who name="Mark Lam">mark.lam</who>
    <bug_when>2014-08-21 17:57:10 -0700</bug_when>
    <thetext>Comment on attachment 236948
The patch

View in context: https://bugs.webkit.org/attachment.cgi?id=236948&amp;action=review

&gt; Source/JavaScriptCore/bytecode/CodeOrigin.h:164
&gt; +    static const int maxStackOffset = (1 &lt;&lt; 29) - 1;
&gt; +    static const int minStackOffset = (~0 &lt;&lt; 29);

Wrong limits.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1030612</commentid>
    <comment_count>3</comment_count>
      <attachid>236949</attachid>
    <who name="Mark Lam">mark.lam</who>
    <bug_when>2014-08-21 17:58:21 -0700</bug_when>
    <thetext>Created attachment 236949
patch 2: with correct limits</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1030620</commentid>
    <comment_count>4</comment_count>
      <attachid>236949</attachid>
    <who name="Filip Pizlo">fpizlo</who>
    <bug_when>2014-08-21 18:17:46 -0700</bug_when>
    <thetext>Comment on attachment 236949
patch 2: with correct limits

View in context: https://bugs.webkit.org/attachment.cgi?id=236949&amp;action=review

&gt; Source/JavaScriptCore/bytecode/CodeOrigin.h:207
&gt; +    void setStackOffset(signed offset)
&gt; +    {
&gt; +        RELEASE_ASSERT(minStackOffset &lt;= offset &amp;&amp; offset &lt;= maxStackOffset);
&gt; +        stackOffset = offset;
&gt; +    }

Why can&apos;t this just be:

void setStackOffset(signed offset)
{
    stackOffset = offset;
    RELEASE_ASSERT(static_cast&lt;signed&gt;(stackOffset) == offset);
}

Then you can get rid of the minStackOffset/maxStackOffset constants.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1030662</commentid>
    <comment_count>5</comment_count>
    <who name="Mark Lam">mark.lam</who>
    <bug_when>2014-08-21 21:11:18 -0700</bug_when>
    <thetext>(In reply to comment #4)
&gt; Why can&apos;t this just be:
&gt; 
&gt; void setStackOffset(signed offset)
&gt; {
&gt;     stackOffset = offset;
&gt;     RELEASE_ASSERT(static_cast&lt;signed&gt;(stackOffset) == offset);
&gt; }
&gt; 
&gt; Then you can get rid of the minStackOffset/maxStackOffset constants.

That is an excellent and superior solution.  Will fix.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1030665</commentid>
    <comment_count>6</comment_count>
      <attachid>236964</attachid>
    <who name="Mark Lam">mark.lam</who>
    <bug_when>2014-08-21 21:44:29 -0700</bug_when>
    <thetext>Created attachment 236964
patch 3: with better assertion.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1030671</commentid>
    <comment_count>7</comment_count>
      <attachid>236964</attachid>
    <who name="WebKit Commit Bot">commit-queue</who>
    <bug_when>2014-08-21 22:30:14 -0700</bug_when>
    <thetext>Comment on attachment 236964
patch 3: with better assertion.

Clearing flags on attachment: 236964

Committed r172853: &lt;http://trac.webkit.org/changeset/172853&gt;</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>1030672</commentid>
    <comment_count>8</comment_count>
    <who name="WebKit Commit Bot">commit-queue</who>
    <bug_when>2014-08-21 22:30:17 -0700</bug_when>
    <thetext>All reviewed patches have been landed.  Closing bug.</thetext>
  </long_desc>
      
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            <attachid>236948</attachid>
            <date>2014-08-21 17:54:34 -0700</date>
            <delta_ts>2014-08-21 17:58:21 -0700</delta_ts>
            <desc>The patch</desc>
            <filename>bug-136141.patch</filename>
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            <attacher name="Mark Lam">mark.lam</attacher>
            
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            <attachid>236949</attachid>
            <date>2014-08-21 17:58:21 -0700</date>
            <delta_ts>2014-08-21 21:44:29 -0700</delta_ts>
            <desc>patch 2: with correct limits</desc>
            <filename>bug-136141.patch</filename>
            <type>text/plain</type>
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            <attacher name="Mark Lam">mark.lam</attacher>
            
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          </attachment>
          <attachment
              isobsolete="0"
              ispatch="1"
              isprivate="0"
          >
            <attachid>236964</attachid>
            <date>2014-08-21 21:44:29 -0700</date>
            <delta_ts>2014-08-21 22:30:14 -0700</delta_ts>
            <desc>patch 3: with better assertion.</desc>
            <filename>bug-136141.patch</filename>
            <type>text/plain</type>
            <size>3359</size>
            <attacher name="Mark Lam">mark.lam</attacher>
            
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</bugzilla>