Bug 224381

Summary:

Reduce maximum HashTable entry size to 128 bytes

Product:

WebKit

Reporter:

Alex Christensen <achristensen>

Component:

New Bugs

Assignee:

Alex Christensen <achristensen>

Status:

RESOLVED FIXED

Severity:

Normal

CC:

benjamin, cdumez, cgarcia, cmarcelo, don.olmstead, ews-watchlist, hi, joepeck, lmoura, mcatanzaro, rbuis, webkit-bug-importer, ysuzuki

Priority:

Keywords:

InRadar

Version:

WebKit Nightly Build

Hardware:

Unspecified

OS:

Unspecified

See Also:

https://bugs.webkit.org/show_bug.cgi?id=224567

Attachments:

Description	Flags
Patch	none
Patch	none

Description Alex Christensen 2021-04-09 11:23:44 PDT

Reduce maximum HashTable entry size to 128 bytes

Comment 1 Alex Christensen 2021-04-09 11:26:43 PDT

Created attachment 425636 [details]
Patch

Comment 2 Yusuke Suzuki 2021-04-09 11:34:53 PDT

Comment on attachment 425636 [details]
Patch

r=me

Comment 3 Alex Christensen 2021-04-09 11:41:16 PDT

Could someone working on Linux fix the GTK/WPE build with this change?  It should be straightforward to just use UniqueRef and you'll probably need makeUniqueRefWithoutFastMallocCheck for ANGLE types, but that's more than is reasonable to do with blind EWS iteration.

Comment 4 Alex Christensen 2021-04-14 09:16:49 PDT

After cc'ing several Linux developers on this who have made commits since then, then waiting a few days, then asking on an active slack channel with other people asking for reviews and getting them, then waiting a few days, and still no response, I feel I have done my due diligence in trying to not break the Linux build.

Comment 5 Alex Christensen 2021-04-14 09:19:51 PDT

r275948

Comment 6 Alex Christensen 2021-04-14 11:42:39 PDT

r275954

Comment 7 Lauro Moura 2021-04-14 12:30:45 PDT

GLIB fixes before r275954 are about to be landed in bug224567 (through fast-cq)

Comment 8 Alex Christensen 2021-04-15 12:42:39 PDT

Reopening to attach new patch.

Comment 9 Alex Christensen 2021-04-15 12:42:41 PDT

Created attachment 426126 [details]
Patch

Comment 10 Radar WebKit Bug Importer 2021-04-16 11:24:18 PDT

<rdar://problem/76769402>

Comment 11 Yusuke Suzuki 2021-04-16 11:28:33 PDT

Comment on attachment 426126 [details]
Patch

r=me

Comment 12 EWS 2021-04-16 12:23:05 PDT

Committed r276154 (236645@main): <https://commits.webkit.org/236645@main>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 426126 [details].

Comment 13 Michael Catanzaro 2021-04-16 15:03:27 PDT

Currently trying to wrap my head around these new inscrutable (and very verbose) warnings:

[2920/5456] Building CXX object Source/WebCore/CMakeFiles...vedSources/unified-sources/UnifiedSource-f74e0903-7.cpp.o
In file included from ../../Source/WebCore/page/SecurityOriginData.h:28,
                 from ../../Source/WebCore/workers/service/ServiceWorkerRegistrationKey.h:30,
                 from ../../Source/WebCore/workers/service/server/SWScriptStorage.cpp:32,
                 from WebCore/DerivedSources/unified-sources/UnifiedSource-f74e0903-7.cpp:1:
In member function ‘WTF::URL& WTF::URL::operator=(WTF::URL&&)’,
    inlined from ‘void WebCore::ServiceWorkerRegistrationKey::setScope(WTF::URL&&)’ at ../../Source/WebCore/workers/service/ServiceWorkerRegistrationKey.h:52:44,
    inlined from ‘static void WTF::HashTraits<WebCore::ServiceWorkerRegistrationKey>::constructDeletedValue(WebCore::ServiceWorkerRegistrationKey&)’ at ../../Source/WebCore/workers/service/ServiceWorkerRegistrationKey.h:109:99,
    inlined from ‘typename std::enable_if<(! WTF::HashTraitHasCustomDelete<Traits, T>::value)>::type WTF::hashTraitsDeleteBucket(T&) [with Traits = WTF::HashTraits<WebCore::ServiceWorkerRegistrationKey>; T = WebCore::ServiceWorkerRegistrationKey]’ at WTF/Headers/wtf/HashTraits.h:305:34,
    inlined from ‘static void WTF::KeyValuePairHashTraits<KeyTraitsArg, ValueTraitsArg>::customDeleteBucket(WTF::KeyValuePairHashTraits<KeyTraitsArg, ValueTraitsArg>::TraitType&) [with KeyTraitsArg = WTF::HashTraits<WebCore::ServiceWorkerRegistrationKey>; ValueTraitsArg = WTF::HashTraits<WTF::WeakPtr<WebCore::SWServerRegistration> >]’ at WTF/Headers/wtf/HashTraits.h:378:42,
    inlined from ‘typename std::enable_if<WTF::HashTraitHasCustomDelete<Traits, T>::value>::type WTF::hashTraitsDeleteBucket(T&) [with Traits = WTF::HashMap<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >::KeyValuePairTraits; T = WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >]’ at WTF/Headers/wtf/HashTraits.h:297:31,
    inlined from ‘static void WTF::HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::deleteBucket(WTF::HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::ValueType&) [with Key = WebCore::ServiceWorkerRegistrationKey; Value = WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >; Extractor = WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> > >; HashFunctions = WTF::DefaultHash<WebCore::ServiceWorkerRegistrationKey>; Traits = WTF::HashMap<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >::KeyValuePairTraits; KeyTraits = WTF::HashTraits<WebCore::ServiceWorkerRegistrationKey>]’ at WTF/Headers/wtf/HashTable.h:549:85,
    inlined from ‘void WTF::HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::remove(WTF::HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::ValueType*) [with Key = WebCore::ServiceWorkerRegistrationKey; Value = WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >; Extractor = WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> > >; HashFunctions = WTF::DefaultHash<WebCore::ServiceWorkerRegistrationKey>; Traits = WTF::HashMap<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >::KeyValuePairTraits; KeyTraits = WTF::HashTraits<WebCore::ServiceWorkerRegistrationKey>]’ at WTF/Headers/wtf/HashTable.h:1127:21:
WTF/Headers/wtf/URL.h:56:7: warning: ‘*(long unsigned int*)((char*)&<unnamed> + offsetof(WTF::URL, WTF::URL::m_isValid))’ is used uninitialized [-Wuninitialized]
   56 | class URL {
      |       ^~~
In file included from ../../Source/WebCore/workers/service/server/SWScriptStorage.cpp:32,
                 from WebCore/DerivedSources/unified-sources/UnifiedSource-f74e0903-7.cpp:1:
../../Source/WebCore/workers/service/ServiceWorkerRegistrationKey.h: In member function ‘void WTF::HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::remove(WTF::HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::ValueType*) [with Key = WebCore::ServiceWorkerRegistrationKey; Value = WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >; Extractor = WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> > >; HashFunctions = WTF::DefaultHash<WebCore::ServiceWorkerRegistrationKey>; Traits = WTF::HashMap<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >::KeyValuePairTraits; KeyTraits = WTF::HashTraits<WebCore::ServiceWorkerRegistrationKey>]’:
../../Source/WebCore/workers/service/ServiceWorkerRegistrationKey.h:109:125: note: ‘<anonymous>’ declared here
  109 |     static void constructDeletedValue(WebCore::ServiceWorkerRegistrationKey& slot) { slot.setScope(URL(HashTableDeletedValue)); }
      |                                                                                                                             ^
In file included from ../../Source/WebCore/page/SecurityOriginData.h:28,
                 from ../../Source/WebCore/workers/service/ServiceWorkerRegistrationKey.h:30,
                 from ../../Source/WebCore/workers/service/server/SWScriptStorage.cpp:32,
                 from WebCore/DerivedSources/unified-sources/UnifiedSource-f74e0903-7.cpp:1:
In member function ‘WTF::URL& WTF::URL::operator=(WTF::URL&&)’,
    inlined from ‘void WebCore::ServiceWorkerRegistrationKey::setScope(WTF::URL&&)’ at ../../Source/WebCore/workers/service/ServiceWorkerRegistrationKey.h:52:44,
    inlined from ‘static void WTF::HashTraits<WebCore::ServiceWorkerRegistrationKey>::constructDeletedValue(WebCore::ServiceWorkerRegistrationKey&)’ at ../../Source/WebCore/workers/service/ServiceWorkerRegistrationKey.h:109:99,
    inlined from ‘typename std::enable_if<(! WTF::HashTraitHasCustomDelete<Traits, T>::value)>::type WTF::hashTraitsDeleteBucket(T&) [with Traits = WTF::HashTraits<WebCore::ServiceWorkerRegistrationKey>; T = WebCore::ServiceWorkerRegistrationKey]’ at WTF/Headers/wtf/HashTraits.h:305:34,
    inlined from ‘static void WTF::KeyValuePairHashTraits<KeyTraitsArg, ValueTraitsArg>::customDeleteBucket(WTF::KeyValuePairHashTraits<KeyTraitsArg, ValueTraitsArg>::TraitType&) [with KeyTraitsArg = WTF::HashTraits<WebCore::ServiceWorkerRegistrationKey>; ValueTraitsArg = WTF::HashTraits<WTF::WeakPtr<WebCore::SWServerRegistration> >]’ at WTF/Headers/wtf/HashTraits.h:378:42,
    inlined from ‘typename std::enable_if<WTF::HashTraitHasCustomDelete<Traits, T>::value>::type WTF::hashTraitsDeleteBucket(T&) [with Traits = WTF::HashMap<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >::KeyValuePairTraits; T = WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >]’ at WTF/Headers/wtf/HashTraits.h:297:31,
    inlined from ‘static void WTF::HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::deleteBucket(WTF::HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::ValueType&) [with Key = WebCore::ServiceWorkerRegistrationKey; Value = WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >; Extractor = WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> > >; HashFunctions = WTF::DefaultHash<WebCore::ServiceWorkerRegistrationKey>; Traits = WTF::HashMap<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >::KeyValuePairTraits; KeyTraits = WTF::HashTraits<WebCore::ServiceWorkerRegistrationKey>]’ at WTF/Headers/wtf/HashTable.h:549:85,
    inlined from ‘void WTF::HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::remove(WTF::HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::ValueType*) [with Key = WebCore::ServiceWorkerRegistrationKey; Value = WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >; Extractor = WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> > >; HashFunctions = WTF::DefaultHash<WebCore::ServiceWorkerRegistrationKey>; Traits = WTF::HashMap<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >::KeyValuePairTraits; KeyTraits = WTF::HashTraits<WebCore::ServiceWorkerRegistrationKey>]’ at WTF/Headers/wtf/HashTable.h:1127:21:
WTF/Headers/wtf/URL.h:56:7: warning: ‘*(long unsigned int*)((char*)&<unnamed> + offsetof(WTF::URL, WTF::URL::m_userEnd))’ is used uninitialized [-Wuninitialized]
   56 | class URL {
      |       ^~~
In file included from ../../Source/WebCore/workers/service/server/SWScriptStorage.cpp:32,
                 from WebCore/DerivedSources/unified-sources/UnifiedSource-f74e0903-7.cpp:1:
../../Source/WebCore/workers/service/ServiceWorkerRegistrationKey.h: In member function ‘void WTF::HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::remove(WTF::HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::ValueType*) [with Key = WebCore::ServiceWorkerRegistrationKey; Value = WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >; Extractor = WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> > >; HashFunctions = WTF::DefaultHash<WebCore::ServiceWorkerRegistrationKey>; Traits = WTF::HashMap<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >::KeyValuePairTraits; KeyTraits = WTF::HashTraits<WebCore::ServiceWorkerRegistrationKey>]’:
../../Source/WebCore/workers/service/ServiceWorkerRegistrationKey.h:109:125: note: ‘<anonymous>’ declared here
  109 |     static void constructDeletedValue(WebCore::ServiceWorkerRegistrationKey& slot) { slot.setScope(URL(HashTableDeletedValue)); }
      |                                                                                                                             ^
In file included from ../../Source/WebCore/page/SecurityOriginData.h:28,
                 from ../../Source/WebCore/workers/service/ServiceWorkerRegistrationKey.h:30,
                 from ../../Source/WebCore/workers/service/server/SWScriptStorage.cpp:32,
                 from WebCore/DerivedSources/unified-sources/UnifiedSource-f74e0903-7.cpp:1:
In member function ‘WTF::URL& WTF::URL::operator=(WTF::URL&&)’,
    inlined from ‘void WebCore::ServiceWorkerRegistrationKey::setScope(WTF::URL&&)’ at ../../Source/WebCore/workers/service/ServiceWorkerRegistrationKey.h:52:44,
    inlined from ‘static void WTF::HashTraits<WebCore::ServiceWorkerRegistrationKey>::constructDeletedValue(WebCore::ServiceWorkerRegistrationKey&)’ at ../../Source/WebCore/workers/service/ServiceWorkerRegistrationKey.h:109:99,
    inlined from ‘typename std::enable_if<(! WTF::HashTraitHasCustomDelete<Traits, T>::value)>::type WTF::hashTraitsDeleteBucket(T&) [with Traits = WTF::HashTraits<WebCore::ServiceWorkerRegistrationKey>; T = WebCore::ServiceWorkerRegistrationKey]’ at WTF/Headers/wtf/HashTraits.h:305:34,
    inlined from ‘static void WTF::KeyValuePairHashTraits<KeyTraitsArg, ValueTraitsArg>::customDeleteBucket(WTF::KeyValuePairHashTraits<KeyTraitsArg, ValueTraitsArg>::TraitType&) [with KeyTraitsArg = WTF::HashTraits<WebCore::ServiceWorkerRegistrationKey>; ValueTraitsArg = WTF::HashTraits<WTF::WeakPtr<WebCore::SWServerRegistration> >]’ at WTF/Headers/wtf/HashTraits.h:378:42,
    inlined from ‘typename std::enable_if<WTF::HashTraitHasCustomDelete<Traits, T>::value>::type WTF::hashTraitsDeleteBucket(T&) [with Traits = WTF::HashMap<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >::KeyValuePairTraits; T = WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >]’ at WTF/Headers/wtf/HashTraits.h:297:31,
    inlined from ‘static void WTF::HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::deleteBucket(WTF::HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::ValueType&) [with Key = WebCore::ServiceWorkerRegistrationKey; Value = WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >; Extractor = WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> > >; HashFunctions = WTF::DefaultHash<WebCore::ServiceWorkerRegistrationKey>; Traits = WTF::HashMap<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >::KeyValuePairTraits; KeyTraits = WTF::HashTraits<WebCore::ServiceWorkerRegistrationKey>]’ at WTF/Headers/wtf/HashTable.h:549:85,
    inlined from ‘void WTF::HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::remove(WTF::HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::ValueType*) [with Key = WebCore::ServiceWorkerRegistrationKey; Value = WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >; Extractor = WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> > >; HashFunctions = WTF::DefaultHash<WebCore::ServiceWorkerRegistrationKey>; Traits = WTF::HashMap<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >::KeyValuePairTraits; KeyTraits = WTF::HashTraits<WebCore::ServiceWorkerRegistrationKey>]’ at WTF/Headers/wtf/HashTable.h:1127:21:
WTF/Headers/wtf/URL.h:56:7: warning: ‘*(long unsigned int*)((char*)&<unnamed> + offsetof(WTF::URL, WTF::URL::m_hostEnd))’ is used uninitialized [-Wuninitialized]
   56 | class URL {
      |       ^~~
In file included from ../../Source/WebCore/workers/service/server/SWScriptStorage.cpp:32,
                 from WebCore/DerivedSources/unified-sources/UnifiedSource-f74e0903-7.cpp:1:
../../Source/WebCore/workers/service/ServiceWorkerRegistrationKey.h: In member function ‘void WTF::HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::remove(WTF::HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::ValueType*) [with Key = WebCore::ServiceWorkerRegistrationKey; Value = WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >; Extractor = WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> > >; HashFunctions = WTF::DefaultHash<WebCore::ServiceWorkerRegistrationKey>; Traits = WTF::HashMap<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >::KeyValuePairTraits; KeyTraits = WTF::HashTraits<WebCore::ServiceWorkerRegistrationKey>]’:
../../Source/WebCore/workers/service/ServiceWorkerRegistrationKey.h:109:125: note: ‘<anonymous>’ declared here
  109 |     static void constructDeletedValue(WebCore::ServiceWorkerRegistrationKey& slot) { slot.setScope(URL(HashTableDeletedValue)); }
      |                                                                                                                             ^
In file included from ../../Source/WebCore/page/SecurityOriginData.h:28,
                 from ../../Source/WebCore/workers/service/ServiceWorkerRegistrationKey.h:30,
                 from ../../Source/WebCore/workers/service/server/SWScriptStorage.cpp:32,
                 from WebCore/DerivedSources/unified-sources/UnifiedSource-f74e0903-7.cpp:1:
In member function ‘WTF::URL& WTF::URL::operator=(WTF::URL&&)’,
    inlined from ‘void WebCore::ServiceWorkerRegistrationKey::setScope(WTF::URL&&)’ at ../../Source/WebCore/workers/service/ServiceWorkerRegistrationKey.h:52:44,
    inlined from ‘static void WTF::HashTraits<WebCore::ServiceWorkerRegistrationKey>::constructDeletedValue(WebCore::ServiceWorkerRegistrationKey&)’ at ../../Source/WebCore/workers/service/ServiceWorkerRegistrationKey.h:109:99,
    inlined from ‘typename std::enable_if<(! WTF::HashTraitHasCustomDelete<Traits, T>::value)>::type WTF::hashTraitsDeleteBucket(T&) [with Traits = WTF::HashTraits<WebCore::ServiceWorkerRegistrationKey>; T = WebCore::ServiceWorkerRegistrationKey]’ at WTF/Headers/wtf/HashTraits.h:305:34,
    inlined from ‘static void WTF::KeyValuePairHashTraits<KeyTraitsArg, ValueTraitsArg>::customDeleteBucket(WTF::KeyValuePairHashTraits<KeyTraitsArg, ValueTraitsArg>::TraitType&) [with KeyTraitsArg = WTF::HashTraits<WebCore::ServiceWorkerRegistrationKey>; ValueTraitsArg = WTF::HashTraits<WTF::WeakPtr<WebCore::SWServerRegistration> >]’ at WTF/Headers/wtf/HashTraits.h:378:42,
    inlined from ‘typename std::enable_if<WTF::HashTraitHasCustomDelete<Traits, T>::value>::type WTF::hashTraitsDeleteBucket(T&) [with Traits = WTF::HashMap<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >::KeyValuePairTraits; T = WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >]’ at WTF/Headers/wtf/HashTraits.h:297:31,
    inlined from ‘static void WTF::HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::deleteBucket(WTF::HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::ValueType&) [with Key = WebCore::ServiceWorkerRegistrationKey; Value = WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >; Extractor = WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> > >; HashFunctions = WTF::DefaultHash<WebCore::ServiceWorkerRegistrationKey>; Traits = WTF::HashMap<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >::KeyValuePairTraits; KeyTraits = WTF::HashTraits<WebCore::ServiceWorkerRegistrationKey>]’ at WTF/Headers/wtf/HashTable.h:549:85,
    inlined from ‘void WTF::HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::remove(WTF::HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::ValueType*) [with Key = WebCore::ServiceWorkerRegistrationKey; Value = WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >; Extractor = WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> > >; HashFunctions = WTF::DefaultHash<WebCore::ServiceWorkerRegistrationKey>; Traits = WTF::HashMap<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >::KeyValuePairTraits; KeyTraits = WTF::HashTraits<WebCore::ServiceWorkerRegistrationKey>]’ at WTF/Headers/wtf/HashTable.h:1127:21:
WTF/Headers/wtf/URL.h:56:7: warning: ‘*(long unsigned int*)((char*)&<unnamed> + offsetof(WTF::URL, WTF::URL::m_pathEnd))’ is used uninitialized [-Wuninitialized]
   56 | class URL {
      |       ^~~
In file included from ../../Source/WebCore/workers/service/server/SWScriptStorage.cpp:32,
                 from WebCore/DerivedSources/unified-sources/UnifiedSource-f74e0903-7.cpp:1:
../../Source/WebCore/workers/service/ServiceWorkerRegistrationKey.h: In member function ‘void WTF::HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::remove(WTF::HashTable<Key, Value, Extractor, HashFunctions, Traits, KeyTraits>::ValueType*) [with Key = WebCore::ServiceWorkerRegistrationKey; Value = WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >; Extractor = WTF::KeyValuePairKeyExtractor<WTF::KeyValuePair<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> > >; HashFunctions = WTF::DefaultHash<WebCore::ServiceWorkerRegistrationKey>; Traits = WTF::HashMap<WebCore::ServiceWorkerRegistrationKey, WTF::WeakPtr<WebCore::SWServerRegistration> >::KeyValuePairTraits; KeyTraits = WTF::HashTraits<WebCore::ServiceWorkerRegistrationKey>]’:
../../Source/WebCore/workers/service/ServiceWorkerRegistrationKey.h:109:125: note: ‘<anonymous>’ declared here
  109 |     static void constructDeletedValue(WebCore::ServiceWorkerRegistrationKey& slot) { slot.setScope(URL(HashTableDeletedValue)); }
      |                                                                                                                             ^

Comment 14 Alex Christensen 2021-04-16 21:09:49 PDT

Very interesting, although unrelated to this change.  It looks like it's complaining that URL::URL(HashTableDeletedValueType) doesn't initialize any members but m_string.  That's fine because only m_string is used for hash-table-deleted-entry-URLs and probably preferred because it does fewer write operations.
Maybe there's a way to silence those warnings or initialize all the members only in builds that would see those warnings.

Comment 15 Michael Catanzaro 2021-04-17 06:31:14 PDT

OK sorry, I commented here because I incorrectly assumed it was caused by this change.

(In reply to Alex Christensen from comment #14)
> Very interesting, although unrelated to this change.  It looks like it's
> complaining that URL::URL(HashTableDeletedValueType) doesn't initialize any
> members but m_string.  That's fine because only m_string is used for
> hash-table-deleted-entry-URLs and probably preferred because it does fewer
> write operations.
> Maybe there's a way to silence those warnings or initialize all the members
> only in builds that would see those warnings.

Hmm, I can silence it, sure, but initializing variables is cheap and more robust. In theory, the warning is only supposed to print if uninitialized data is actually used, but I'm losing confidence in GCC's ability to avoid false positives....

Comment 16 Michael Catanzaro 2021-04-19 07:00:37 PDT

I've created bug #224755 so we can continue discussion there instead of further polluting this issue. Sorry for commenting in the wrong place.