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<!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>311960</bug_id>
          
          <creation_ts>2026-04-10 12:26:25 -0700</creation_ts>
          <short_desc>[libpas] De-singletonize pas_large_map to allow for multiple instances</short_desc>
          <delta_ts>2026-04-15 14:13:15 -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>bmalloc</component>
          <version>WebKit 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>InRadar</keywords>
          <priority>P2</priority>
          <bug_severity>Normal</bug_severity>
          <target_milestone>---</target_milestone>
          
          
          <everconfirmed>1</everconfirmed>
          <reporter name="Marcus Plutowski">marcus_plutowski</reporter>
          <assigned_to name="Nobody">webkit-unassigned</assigned_to>
          <cc>ggaren</cc>
    
    <cc>webkit-bug-importer</cc>
          

      

      

      

          <comment_sort_order>oldest_to_newest</comment_sort_order>  
          <long_desc isprivate="0" >
    <commentid>2198906</commentid>
    <comment_count>0</comment_count>
    <who name="Marcus Plutowski">marcus_plutowski</who>
    <bug_when>2026-04-10 12:26:25 -0700</bug_when>
    <thetext>rdar://174512866

Currently, libpas uses singletons for the various large-map hashtables (and associated metadata):
```
PAS_API extern pas_large_map_hashtable pas_large_map_hashtable_instance;                                                                
PAS_API extern pas_large_map_hashtable_in_flux_stash pas_large_map_hashtable_instance_in_flux_stash;                                    
                                                                                                                                                                                                                                                                    
PAS_API extern pas_small_large_map_hashtable pas_small_large_map_hashtable_instance;                                                    
PAS_API extern pas_small_large_map_hashtable_in_flux_stash pas_small_large_map_hashtable_instance_in_flux_stash;                        
                                                                                                                                        
PAS_API extern pas_tiny_large_map_hashtable pas_tiny_large_map_hashtable_instance;                                                      
PAS_API extern pas_tiny_large_map_hashtable_in_flux_stash pas_tiny_large_map_hashtable_instance_in_flux_stash;                          
PAS_API extern pas_tiny_large_map_second_level_hashtable_in_flux_stash pas_tiny_large_map_second_level_hashtable_in_flux_stash_instance;
```

This is unnecessary, and should be changed to help clear the way for future projects. In particular, we should be able to instantiate an arbitrary number of large-map instances (for each of the above types), and associate each large-heap with an arbitrary large map.</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>2198914</commentid>
    <comment_count>1</comment_count>
    <who name="Marcus Plutowski">marcus_plutowski</who>
    <bug_when>2026-04-10 12:34:04 -0700</bug_when>
    <thetext>Pull request: https://github.com/WebKit/WebKit/pull/62476</thetext>
  </long_desc><long_desc isprivate="0" >
    <commentid>2200822</commentid>
    <comment_count>2</comment_count>
    <who name="EWS">ews-feeder</who>
    <bug_when>2026-04-15 14:13:13 -0700</bug_when>
    <thetext>Committed 311318@main (2c7b7e22dca5): &lt;https://commits.webkit.org/311318@main&gt;

Reviewed commits have been landed. Closing PR #62476 and removing active labels.</thetext>
  </long_desc>
      
      

    </bug>

</bugzilla>