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// Copyright 2021 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.
#ifndef V8_BASELINE_BASELINE_BATCH_COMPILER_H_
#define V8_BASELINE_BASELINE_BATCH_COMPILER_H_
#include <atomic>
#include "src/handles/global-handles.h"
#include "src/handles/handles.h"
namespace v8 {
namespace internal {
namespace baseline {
class BaselineCompiler;
class ConcurrentBaselineCompiler;
class BaselineBatchCompiler {
public:
static const int kInitialQueueSize = 32;
explicit BaselineBatchCompiler(Isolate* isolate);
~BaselineBatchCompiler();
// Enqueues SharedFunctionInfo of |function| for compilation.
void EnqueueFunction(Handle<JSFunction> function);
void EnqueueSFI(SharedFunctionInfo shared);
void set_enabled(bool enabled) { enabled_ = enabled; }
bool is_enabled() { return enabled_; }
void InstallBatch();
private:
// Ensure there is enough space in the compilation queue to enqueue another
// function, growing the queue if necessary.
void EnsureQueueCapacity();
// Enqueues SharedFunctionInfo.
void Enqueue(Handle<SharedFunctionInfo> shared);
// Returns true if the current batch exceeds the threshold and should be
// compiled.
bool ShouldCompileBatch(SharedFunctionInfo shared);
// Compiles the current batch.
void CompileBatch(Handle<JSFunction> function);
// Compiles the current batch concurrently.
void CompileBatchConcurrent(SharedFunctionInfo shared);
// Resets the current batch.
void ClearBatch();
// Tries to compile |maybe_sfi|. Returns false if compilation was not possible
// (e.g. bytecode was fushed, weak handle no longer valid, ...).
bool MaybeCompileFunction(MaybeObject maybe_sfi);
Isolate* isolate_;
// Global handle to shared function infos enqueued for compilation in the
// current batch.
Handle<WeakFixedArray> compilation_queue_;
// Last index set in compilation_queue_;
int last_index_;
// Estimated insturction size of current batch.
int estimated_instruction_size_;
// Flag indicating whether batch compilation is enabled.
// Batch compilation can be dynamically disabled e.g. when creating snapshots.
bool enabled_;
// Handle to the background compilation jobs.
std::unique_ptr<ConcurrentBaselineCompiler> concurrent_compiler_;
};
} // namespace baseline
} // namespace internal
} // namespace v8
#endif // V8_BASELINE_BASELINE_BATCH_COMPILER_H_
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