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LibWeb/Streams: Make ReadRequest GC-allocated

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This allows it to keep its edges alive. Fixes an intermittent crash seen
by UBSAN on CI. :^)
This commit is contained in:
Andreas Kling
2023-08-09 18:17:19 +02:00
parent 40bdcdf966
commit 9c3e9e8981
Notes: sideshowbarker 2024-07-16 20:12:13 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/9c3e9e8981
Pull-request: https://github.com/SerenityOS/serenity/pull/20459
6 changed files with 37 additions and 14 deletions
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24
Userland/Libraries/LibWeb/Streams/ReadableStreamDefaultReader.cpp
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@@ -23,6 +23,13 @@
namespace Web::Streams {
void ReadLoopReadRequest::visit_edges(Visitor& visitor)
{
Base::visit_edges(visitor);
visitor.visit(m_realm);
visitor.visit(m_reader);
}
// https://streams.spec.whatwg.org/#default-reader-constructor
WebIDL::ExceptionOr<JS::NonnullGCPtr<ReadableStreamDefaultReader>> ReadableStreamDefaultReader::construct_impl(JS::Realm& realm, JS::NonnullGCPtr<ReadableStream> stream)
{
@@ -50,6 +57,8 @@ void ReadableStreamDefaultReader::visit_edges(Cell::Visitor& visitor)
{
Base::visit_edges(visitor);
ReadableStreamGenericReaderMixin::visit_edges(visitor);
for (auto& request : m_read_requests)
visitor.visit(request);
}
// https://streams.spec.whatwg.org/#read-loop
@@ -108,7 +117,9 @@ void ReadLoopReadRequest::on_error(JS::Value error)
m_failure_steps(error);
}
class DefaultReaderReadRequest : public ReadRequest {
class DefaultReaderReadRequest final : public ReadRequest {
JS_CELL(DefaultReaderReadRequest, Cell);
public:
DefaultReaderReadRequest(JS::Realm& realm, WebIDL::Promise& promise)
: m_realm(realm)
@@ -132,6 +143,13 @@ public:
}
private:
virtual void visit_edges(Visitor& visitor) override
{
Base::visit_edges(visitor);
visitor.visit(m_realm);
visitor.visit(m_promise);
}
JS::Realm& m_realm;
WebIDL::Promise& m_promise;
};
@@ -158,7 +176,7 @@ WebIDL::ExceptionOr<JS::NonnullGCPtr<JS::Promise>> ReadableStreamDefaultReader::
// Resolve promise with «[ "value" → undefined, "done" → true ]».
// error steps, given e
// Reject promise with e.
auto read_request = adopt_ref(*new DefaultReaderReadRequest(realm, promise_capability));
auto read_request = heap().allocate_without_realm<DefaultReaderReadRequest>(realm, promise_capability);
// 4. Perform ! ReadableStreamDefaultReaderRead(this, readRequest).
TRY(readable_stream_default_reader_read(*this, read_request));
@@ -175,7 +193,7 @@ WebIDL::ExceptionOr<void> ReadableStreamDefaultReader::read_all_bytes(ReadLoopRe
// 1. Let readRequest be a new read request with the following items:
// NOTE: items and steps in ReadLoopReadRequest.
auto read_request = adopt_ref(*new ReadLoopReadRequest(vm, realm, *this, move(success_steps), move(failure_steps)));
auto read_request = heap().allocate_without_realm<ReadLoopReadRequest>(vm, realm, *this, move(success_steps), move(failure_steps));
// 2. Perform ! ReadableStreamDefaultReaderRead(this, readRequest).
TRY(readable_stream_default_reader_read(*this, read_request));