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LibWeb/Fetch: Use JS::HeapFunction for callback in FetchAlgorithms

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In FetchAlgorithms, it is common for callbacks to capture realms. This
can indirectly keep objects alive that hold FetchController with these
callbacks. This creates a cyclic dependency. However, when
JS::HeapFunction is used, this is not a problem, as captured by
callbacks values do not create new roots.
This commit is contained in:
Aliaksandr Kalenik 2023-08-18 18:26:08 +02:00 • committed by Andreas Kling
parent 469aea5a5b
commit 9a07ac0b6a
3 changed files with 54 additions and 41 deletions
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16
Userland/Libraries/LibWeb/Fetch/Fetching/Fetching.cpp
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@ -65,7 +65,7 @@ WebIDL::ExceptionOr<JS::NonnullGCPtr<Infrastructure::FetchController>> fetch(JS:
auto& vm = realm.vm(); auto& vm = realm.vm();
// 1. Assert: request’s mode is "navigate" or processEarlyHintsResponse is null. // 1. Assert: request’s mode is "navigate" or processEarlyHintsResponse is null.
VERIFY(request.mode() == Infrastructure::Request::Mode::Navigate || !algorithms.process_early_hints_response().has_value()); VERIFY(request.mode() == Infrastructure::Request::Mode::Navigate || !algorithms.process_early_hints_response());
// 2. Let taskDestination be null. // 2. Let taskDestination be null.
JS::GCPtr<JS::Object> task_destination; JS::GCPtr<JS::Object> task_destination;
@ -608,8 +608,8 @@ WebIDL::ExceptionOr<void> fetch_response_handover(JS::Realm& realm, Infrastructu
// 2. If fetchParams’s process response end-of-body is non-null, then run fetchParams’s process response // 2. If fetchParams’s process response end-of-body is non-null, then run fetchParams’s process response
// end-of-body given response. // end-of-body given response.
if (fetch_params.algorithms()->process_response_end_of_body().has_value()) if (fetch_params.algorithms()->process_response_end_of_body())
(*fetch_params.algorithms()->process_response_end_of_body())(response); (fetch_params.algorithms()->process_response_end_of_body())(response);
// 3. If fetchParams’s request’s initiator type is non-null and fetchParams’s request’s client’s global // 3. If fetchParams’s request’s initiator type is non-null and fetchParams’s request’s client’s global
// object is fetchParams’s task destination, then run fetchParams’s controller’s report timing steps // object is fetchParams’s task destination, then run fetchParams’s controller’s report timing steps
@ -634,9 +634,9 @@ WebIDL::ExceptionOr<void> fetch_response_handover(JS::Realm& realm, Infrastructu
// 4. If fetchParams’s process response is non-null, then queue a fetch task to run fetchParams’s process response // 4. If fetchParams’s process response is non-null, then queue a fetch task to run fetchParams’s process response
// given response, with fetchParams’s task destination. // given response, with fetchParams’s task destination.
if (fetch_params.algorithms()->process_response().has_value()) { if (fetch_params.algorithms()->process_response()) {
Infrastructure::queue_fetch_task(task_destination, [&fetch_params, &response]() { Infrastructure::queue_fetch_task(task_destination, [&fetch_params, &response]() {
(*fetch_params.algorithms()->process_response())(response); fetch_params.algorithms()->process_response()(response);
}); });
} }
@ -657,17 +657,17 @@ WebIDL::ExceptionOr<void> fetch_response_handover(JS::Realm& realm, Infrastructu
} }
// 8. If fetchParams’s process response consume body is non-null, then: // 8. If fetchParams’s process response consume body is non-null, then:
if (fetch_params.algorithms()->process_response_consume_body().has_value()) { if (fetch_params.algorithms()->process_response_consume_body()) {
// 1. Let processBody given nullOrBytes be this step: run fetchParams’s process response consume body given // 1. Let processBody given nullOrBytes be this step: run fetchParams’s process response consume body given
// response and nullOrBytes. // response and nullOrBytes.
auto process_body = [&fetch_params, &response](Variant<ByteBuffer, Empty> const& null_or_bytes) { auto process_body = [&fetch_params, &response](Variant<ByteBuffer, Empty> const& null_or_bytes) {
(*fetch_params.algorithms()->process_response_consume_body())(response, null_or_bytes); (fetch_params.algorithms()->process_response_consume_body())(response, null_or_bytes);
}; };
// 2. Let processBodyError be this step: run fetchParams’s process response consume body given response and // 2. Let processBodyError be this step: run fetchParams’s process response consume body given response and
// failure. // failure.
auto process_body_error = [&fetch_params, &response](auto) { auto process_body_error = [&fetch_params, &response](auto) {
(*fetch_params.algorithms()->process_response_consume_body())(response, Infrastructure::FetchAlgorithms::ConsumeBodyFailureTag {}); (fetch_params.algorithms()->process_response_consume_body())(response, Infrastructure::FetchAlgorithms::ConsumeBodyFailureTag {});
}; };
// 3. If internalResponse's body is null, then queue a fetch task to run processBody given null, with // 3. If internalResponse's body is null, then queue a fetch task to run processBody given null, with

26
Userland/Libraries/LibWeb/Fetch/Infrastructure/FetchAlgorithms.cpp
View file

@ -12,17 +12,27 @@ namespace Web::Fetch::Infrastructure {
JS::NonnullGCPtr<FetchAlgorithms> FetchAlgorithms::create(JS::VM& vm, Input input) JS::NonnullGCPtr<FetchAlgorithms> FetchAlgorithms::create(JS::VM& vm, Input input)
{ {
return vm.heap().allocate_without_realm<FetchAlgorithms>(move(input)); return vm.heap().allocate_without_realm<FetchAlgorithms>(vm, move(input));
} }
FetchAlgorithms::FetchAlgorithms(Input input) FetchAlgorithms::FetchAlgorithms(JS::VM& vm, Input input)
: m_process_request_body_chunk_length(move(input.process_request_body_chunk_length)) : m_process_request_body_chunk_length(JS::create_heap_function(vm.heap(), move(input.process_request_body_chunk_length)))
, m_process_request_end_of_body(move(input.process_request_end_of_body)) , m_process_request_end_of_body(JS::create_heap_function(vm.heap(), move(input.process_request_end_of_body)))
, m_process_early_hints_response(move(input.process_early_hints_response)) , m_process_early_hints_response(JS::create_heap_function(vm.heap(), move(input.process_early_hints_response)))
, m_process_response(move(input.process_response)) , m_process_response(JS::create_heap_function(vm.heap(), move(input.process_response)))
, m_process_response_end_of_body(move(input.process_response_end_of_body)) , m_process_response_end_of_body(JS::create_heap_function(vm.heap(), move(input.process_response_end_of_body)))
, m_process_response_consume_body(move(input.process_response_consume_body)) , m_process_response_consume_body(JS::create_heap_function(vm.heap(), move(input.process_response_consume_body)))
{ {
} }
void FetchAlgorithms::visit_edges(JS::Cell::Visitor& visitor)
{
visitor.visit(m_process_request_body_chunk_length);
visitor.visit(m_process_request_end_of_body);
visitor.visit(m_process_early_hints_response);
visitor.visit(m_process_response);
visitor.visit(m_process_response_end_of_body);
visitor.visit(m_process_response_consume_body);
}
} }

53
Userland/Libraries/LibWeb/Fetch/Infrastructure/FetchAlgorithms.h
View file

@ -9,6 +9,7 @@
#include <AK/Optional.h> #include <AK/Optional.h>
#include <LibJS/Heap/Cell.h> #include <LibJS/Heap/Cell.h>
#include <LibJS/Heap/GCPtr.h> #include <LibJS/Heap/GCPtr.h>
#include <LibJS/Heap/HeapFunction.h>
#include <LibJS/SafeFunction.h> #include <LibJS/SafeFunction.h>
#include <LibWeb/Forward.h> #include <LibWeb/Forward.h>
@ -22,40 +23,42 @@ public:
struct ConsumeBodyFailureTag { }; struct ConsumeBodyFailureTag { };
using BodyBytes = Variant<Empty, ConsumeBodyFailureTag, ByteBuffer>; using BodyBytes = Variant<Empty, ConsumeBodyFailureTag, ByteBuffer>;
using ProcessRequestBodyChunkLengthFunction = JS::SafeFunction<void(u64)>; using ProcessRequestBodyChunkLengthFunction = Function<void(u64)>;
using ProcessRequestEndOfBodyFunction = JS::SafeFunction<void()>; using ProcessRequestEndOfBodyFunction = Function<void()>;
using ProcessEarlyHintsResponseFunction = JS::SafeFunction<void(JS::NonnullGCPtr<Infrastructure::Response>)>; using ProcessEarlyHintsResponseFunction = Function<void(JS::NonnullGCPtr<Infrastructure::Response>)>;
using ProcessResponseFunction = JS::SafeFunction<void(JS::NonnullGCPtr<Infrastructure::Response>)>; using ProcessResponseFunction = Function<void(JS::NonnullGCPtr<Infrastructure::Response>)>;
using ProcessResponseEndOfBodyFunction = JS::SafeFunction<void(JS::NonnullGCPtr<Infrastructure::Response>)>; using ProcessResponseEndOfBodyFunction = Function<void(JS::NonnullGCPtr<Infrastructure::Response>)>;
using ProcessResponseConsumeBodyFunction = JS::SafeFunction<void(JS::NonnullGCPtr<Infrastructure::Response>, BodyBytes)>; using ProcessResponseConsumeBodyFunction = Function<void(JS::NonnullGCPtr<Infrastructure::Response>, BodyBytes)>;
struct Input { struct Input {
Optional<ProcessRequestBodyChunkLengthFunction> process_request_body_chunk_length; ProcessRequestBodyChunkLengthFunction process_request_body_chunk_length;
Optional<ProcessRequestEndOfBodyFunction> process_request_end_of_body; ProcessRequestEndOfBodyFunction process_request_end_of_body;
Optional<ProcessEarlyHintsResponseFunction> process_early_hints_response; ProcessEarlyHintsResponseFunction process_early_hints_response;
Optional<ProcessResponseFunction> process_response; ProcessResponseFunction process_response;
Optional<ProcessResponseEndOfBodyFunction> process_response_end_of_body; ProcessResponseEndOfBodyFunction process_response_end_of_body;
Optional<ProcessResponseConsumeBodyFunction> process_response_consume_body; ProcessResponseConsumeBodyFunction process_response_consume_body;
}; };
[[nodiscard]] static JS::NonnullGCPtr<FetchAlgorithms> create(JS::VM&, Input); [[nodiscard]] static JS::NonnullGCPtr<FetchAlgorithms> create(JS::VM&, Input);
Optional<ProcessRequestBodyChunkLengthFunction> const& process_request_body_chunk_length() const { return m_process_request_body_chunk_length; } ProcessRequestBodyChunkLengthFunction const& process_request_body_chunk_length() const { return m_process_request_body_chunk_length->function(); }
Optional<ProcessRequestEndOfBodyFunction> const& process_request_end_of_body() const { return m_process_request_end_of_body; } ProcessRequestEndOfBodyFunction const& process_request_end_of_body() const { return m_process_request_end_of_body->function(); }
Optional<ProcessEarlyHintsResponseFunction> const& process_early_hints_response() const { return m_process_early_hints_response; } ProcessEarlyHintsResponseFunction const& process_early_hints_response() const { return m_process_early_hints_response->function(); }
Optional<ProcessResponseFunction> const& process_response() const { return m_process_response; } ProcessResponseFunction const& process_response() const { return m_process_response->function(); }
Optional<ProcessResponseEndOfBodyFunction> const& process_response_end_of_body() const { return m_process_response_end_of_body; } ProcessResponseEndOfBodyFunction const& process_response_end_of_body() const { return m_process_response_end_of_body->function(); }
Optional<ProcessResponseConsumeBodyFunction> const& process_response_consume_body() const { return m_process_response_consume_body; } ProcessResponseConsumeBodyFunction const& process_response_consume_body() const { return m_process_response_consume_body->function(); }
virtual void visit_edges(JS::Cell::Visitor&) override;
private: private:
explicit FetchAlgorithms(Input); explicit FetchAlgorithms(JS::VM&, Input);
Optional<ProcessRequestBodyChunkLengthFunction> m_process_request_body_chunk_length; JS::NonnullGCPtr<JS::HeapFunction<void(u64)>> m_process_request_body_chunk_length;
Optional<ProcessRequestEndOfBodyFunction> m_process_request_end_of_body; JS::NonnullGCPtr<JS::HeapFunction<void()>> m_process_request_end_of_body;
Optional<ProcessEarlyHintsResponseFunction> m_process_early_hints_response; JS::NonnullGCPtr<JS::HeapFunction<void(JS::NonnullGCPtr<Infrastructure::Response>)>> m_process_early_hints_response;
Optional<ProcessResponseFunction> m_process_response; JS::NonnullGCPtr<JS::HeapFunction<void(JS::NonnullGCPtr<Infrastructure::Response>)>> m_process_response;
Optional<ProcessResponseEndOfBodyFunction> m_process_response_end_of_body; JS::NonnullGCPtr<JS::HeapFunction<void(JS::NonnullGCPtr<Infrastructure::Response>)>> m_process_response_end_of_body;
Optional<ProcessResponseConsumeBodyFunction> m_process_response_consume_body; JS::NonnullGCPtr<JS::HeapFunction<void(JS::NonnullGCPtr<Infrastructure::Response>, BodyBytes)>> m_process_response_consume_body;
}; };
} }