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LibWeb+LibJS: Cache decoded JS bytecode sidecars

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Add a ref-counted decoded bytecode cache backing so bytecode cache
materialization can create fresh script or module records from a shared
decoded sidecar without passing around one-shot raw blob ownership.

Keep that backing in ExecutableBacking for records materialized from
bytecode cache sidecars, so the immutable decoded data stays alive for
as long as the installed record needs it.

Cover the shared backing path with a bytecode-cache test that
materializes and runs two scripts from one decoded backing.
This commit is contained in:
Andreas Kling 2026-05-28 19:09:12 +02:00 • committed by Andreas Kling
parent 72720bc229
commit 6ecfcd3e68
Notes: github-actions[bot] 2026-06-06 07:16:03 +00:00
17 changed files with 385 additions and 298 deletions
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Libraries/LibWeb/HTML/Scripting/ModuleScript.cpp
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@ -112,7 +112,7 @@ WebIDL::ExceptionOr<GC::Ptr<ModuleScript>> ModuleScript::create_from_pre_compile
return script;
}
WebIDL::ExceptionOr<GC::Ptr<ModuleScript>> ModuleScript::create_from_bytecode_cache(ByteString const& filename, NonnullRefPtr<JS::SourceCode const> source_code, EnvironmentSettingsObject& settings, URL::URL base_url, JS::FFI::DecodedBytecodeCacheBlob* bytecode_cache)
WebIDL::ExceptionOr<GC::Ptr<ModuleScript>> ModuleScript::create_from_bytecode_cache(ByteString const& filename, NonnullRefPtr<JS::SourceCode const> source_code, EnvironmentSettingsObject& settings, URL::URL base_url, NonnullRefPtr<JS::RustIntegration::DecodedBytecodeCache> bytecode_cache)
{
auto& realm = settings.realm();
auto script = realm.create<ModuleScript>(move(base_url), filename, settings);