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LibWeb: Don't store GC::Root<JS::ArrayBuffer> in FileAPI::FileReader

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This was creating a reference cycle and leaking the realm.
This commit is contained in:
Andreas Kling
2025-12-26 06:56:24 +01:00
committed by Jelle Raaijmakers
parent b291d75289
commit 2d2078d439
4 changed files with 7 additions and 4 deletions
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3
Libraries/LibWeb/FileAPI/FileReader.cpp
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@@ -51,6 +51,9 @@ void FileReader::visit_edges(JS::Cell::Visitor& visitor)
{
Base::visit_edges(visitor);
visitor.visit(m_error);
m_result.visit(
[&](GC::Ref<JS::ArrayBuffer> const& array_buffer) { visitor.visit(array_buffer); },
[](auto&) {});
}
GC::Ref<FileReader> FileReader::create(JS::Realm& realm)

2
Libraries/LibWeb/FileAPI/FileReader.h
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@@ -21,7 +21,7 @@ class FileReader : public DOM::EventTarget {
GC_DECLARE_ALLOCATOR(FileReader);
public:
using Result = Variant<Empty, String, GC::Root<JS::ArrayBuffer>>;
using Result = Variant<Empty, String, GC::Ref<JS::ArrayBuffer>>;
virtual ~FileReader() override;

4
Libraries/LibWeb/FileAPI/FileReaderSync.cpp
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@@ -44,9 +44,9 @@ GC::Ref<FileReaderSync> FileReaderSync::construct_impl(JS::Realm& realm)
}
// https://w3c.github.io/FileAPI/#dfn-readAsArrayBufferSync
WebIDL::ExceptionOr<GC::Root<JS::ArrayBuffer>> FileReaderSync::read_as_array_buffer(Blob& blob)
WebIDL::ExceptionOr<GC::Ref<JS::ArrayBuffer>> FileReaderSync::read_as_array_buffer(Blob& blob)
{
return read_as<GC::Root<JS::ArrayBuffer>>(blob, FileReader::Type::ArrayBuffer);
return read_as<GC::Ref<JS::ArrayBuffer>>(blob, FileReader::Type::ArrayBuffer);
}
// https://w3c.github.io/FileAPI/#dfn-readAsBinaryStringSync

2
Libraries/LibWeb/FileAPI/FileReaderSync.h
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@@ -24,7 +24,7 @@ public:
[[nodiscard]] static GC::Ref<FileReaderSync> create(JS::Realm&);
static GC::Ref<FileReaderSync> construct_impl(JS::Realm&);
WebIDL::ExceptionOr<GC::Root<JS::ArrayBuffer>> read_as_array_buffer(Blob&);
WebIDL::ExceptionOr<GC::Ref<JS::ArrayBuffer>> read_as_array_buffer(Blob&);
WebIDL::ExceptionOr<String> read_as_binary_string(Blob&);
WebIDL::ExceptionOr<String> read_as_text(Blob&, Optional<String> const& encoding = {});
WebIDL::ExceptionOr<String> read_as_data_url(Blob&);