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// Copyright 2020 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "src/heap/cppgc-js/unified-heap-marking-visitor.h"
#include "include/v8.h"
#include "src/heap/cppgc-js/unified-heap-marking-state.h"
#include "src/heap/cppgc/heap.h"
#include "src/heap/cppgc/marking-state.h"
#include "src/heap/cppgc/visitor.h"
namespace v8 {
namespace internal {
UnifiedHeapMarkingVisitorBase::UnifiedHeapMarkingVisitorBase(
HeapBase& heap, cppgc::internal::MarkingStateBase& marking_state,
UnifiedHeapMarkingState& unified_heap_marking_state)
: JSVisitor(cppgc::internal::VisitorFactory::CreateKey()),
marking_state_(marking_state),
unified_heap_marking_state_(unified_heap_marking_state) {}
void UnifiedHeapMarkingVisitorBase::Visit(const void* object,
TraceDescriptor desc) {
marking_state_.MarkAndPush(object, desc);
}
void UnifiedHeapMarkingVisitorBase::VisitWeak(const void* object,
TraceDescriptor desc,
WeakCallback weak_callback,
const void* weak_member) {
marking_state_.RegisterWeakReferenceIfNeeded(object, desc, weak_callback,
weak_member);
}
void UnifiedHeapMarkingVisitorBase::VisitEphemeron(const void* key,
const void* value,
TraceDescriptor value_desc) {
marking_state_.ProcessEphemeron(key, value, value_desc, *this);
}
void UnifiedHeapMarkingVisitorBase::VisitWeakContainer(
const void* self, TraceDescriptor strong_desc, TraceDescriptor weak_desc,
WeakCallback callback, const void* data) {
marking_state_.ProcessWeakContainer(self, weak_desc, callback, data);
}
void UnifiedHeapMarkingVisitorBase::RegisterWeakCallback(WeakCallback callback,
const void* object) {
marking_state_.RegisterWeakCallback(callback, object);
}
void UnifiedHeapMarkingVisitorBase::HandleMovableReference(const void** slot) {
marking_state_.RegisterMovableReference(slot);
}
namespace {
void DeferredTraceTracedReference(cppgc::Visitor* visitor, const void* ref) {
static_cast<JSVisitor*>(visitor)->Trace(
*static_cast<const TracedReferenceBase*>(ref));
}
} // namespace
void UnifiedHeapMarkingVisitorBase::Visit(const TracedReferenceBase& ref) {
bool should_defer_tracing = DeferTraceToMutatorThreadIfConcurrent(
&ref, DeferredTraceTracedReference, 0);
if (!should_defer_tracing) unified_heap_marking_state_.MarkAndPush(ref);
}
MutatorUnifiedHeapMarkingVisitor::MutatorUnifiedHeapMarkingVisitor(
HeapBase& heap, MutatorMarkingState& marking_state,
UnifiedHeapMarkingState& unified_heap_marking_state)
: UnifiedHeapMarkingVisitorBase(heap, marking_state,
unified_heap_marking_state) {}
void MutatorUnifiedHeapMarkingVisitor::VisitRoot(const void* object,
TraceDescriptor desc,
const SourceLocation&) {
this->Visit(object, desc);
}
void MutatorUnifiedHeapMarkingVisitor::VisitWeakRoot(const void* object,
TraceDescriptor desc,
WeakCallback weak_callback,
const void* weak_root,
const SourceLocation&) {
static_cast<MutatorMarkingState&>(marking_state_)
.InvokeWeakRootsCallbackIfNeeded(object, desc, weak_callback, weak_root);
}
ConcurrentUnifiedHeapMarkingVisitor::ConcurrentUnifiedHeapMarkingVisitor(
HeapBase& heap, cppgc::internal::ConcurrentMarkingState& marking_state,
UnifiedHeapMarkingState& unified_heap_marking_state)
: UnifiedHeapMarkingVisitorBase(heap, marking_state,
unified_heap_marking_state) {}
bool ConcurrentUnifiedHeapMarkingVisitor::DeferTraceToMutatorThreadIfConcurrent(
const void* parameter, cppgc::TraceCallback callback,
size_t deferred_size) {
marking_state_.concurrent_marking_bailout_worklist().Push(
{parameter, callback, deferred_size});
static_cast<cppgc::internal::ConcurrentMarkingState&>(marking_state_)
.AccountDeferredMarkedBytes(deferred_size);
return true;
}
} // namespace internal
} // namespace v8
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