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// Copyright 2016 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/embedder-tracing.h"
#include "src/base/logging.h"
namespace v8 {
namespace internal {
void LocalEmbedderHeapTracer::TracePrologue() {
if (!InUse()) return;
CHECK(cached_wrappers_to_trace_.empty());
num_v8_marking_deque_was_empty_ = 0;
remote_tracer_->TracePrologue();
}
void LocalEmbedderHeapTracer::TraceEpilogue() {
if (!InUse()) return;
CHECK(cached_wrappers_to_trace_.empty());
remote_tracer_->TraceEpilogue();
}
void LocalEmbedderHeapTracer::AbortTracing() {
if (!InUse()) return;
cached_wrappers_to_trace_.clear();
remote_tracer_->AbortTracing();
}
void LocalEmbedderHeapTracer::EnterFinalPause() {
if (!InUse()) return;
remote_tracer_->EnterFinalPause();
}
bool LocalEmbedderHeapTracer::Trace(
double deadline, EmbedderHeapTracer::AdvanceTracingActions actions) {
if (!InUse()) return false;
DCHECK_EQ(0, NumberOfCachedWrappersToTrace());
return remote_tracer_->AdvanceTracing(deadline, actions);
}
size_t LocalEmbedderHeapTracer::NumberOfWrappersToTrace() {
return (InUse())
? cached_wrappers_to_trace_.size() +
remote_tracer_->NumberOfWrappersToTrace()
: 0;
}
void LocalEmbedderHeapTracer::RegisterWrappersWithRemoteTracer() {
if (!InUse()) return;
if (cached_wrappers_to_trace_.empty()) {
return;
}
remote_tracer_->RegisterV8References(cached_wrappers_to_trace_);
cached_wrappers_to_trace_.clear();
}
bool LocalEmbedderHeapTracer::RequiresImmediateWrapperProcessing() {
const size_t kTooManyWrappers = 16000;
return cached_wrappers_to_trace_.size() > kTooManyWrappers;
}
} // namespace internal
} // namespace v8
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