pgo.h

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// Copyright 2022 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_WASM_PGO_H_
#define V8_WASM_PGO_H_
 
#if !V8_ENABLE_WEBASSEMBLY
#error This header should only be included if WebAssembly is enabled.
#endif  // !V8_ENABLE_WEBASSEMBLY
 
#include <vector>
 
#include "src/base/vector.h"
 
namespace v8::internal::wasm {
 
struct WasmModule;
 
class ProfileInformation {
 public:
  ProfileInformation(std::vector<uint32_t> executed_functions,
                     std::vector<uint32_t> tiered_up_functions)
      : executed_functions_(std::move(executed_functions)),
        tiered_up_functions_(std::move(tiered_up_functions)) {}
 
  // Disallow copying (not needed, so most probably a bug).
  ProfileInformation(const ProfileInformation&) = delete;
  ProfileInformation& operator=(const ProfileInformation&) = delete;
 
  base::Vector<const uint32_t> executed_functions() const {
    return base::VectorOf(executed_functions_);
  }
  base::Vector<const uint32_t> tiered_up_functions() const {
    return base::VectorOf(tiered_up_functions_);
  }
 
 private:
  const std::vector<uint32_t> executed_functions_;
  const std::vector<uint32_t> tiered_up_functions_;
};
 
void DumpProfileToFile(const WasmModule* module,
                       base::Vector<const uint8_t> wire_bytes,
                       std::atomic<uint32_t>* tiering_budget_array);
 
V8_WARN_UNUSED_RESULT std::unique_ptr<ProfileInformation> LoadProfileFromFile(
    const WasmModule* module, base::Vector<const uint8_t> wire_bytes);
 
}  // namespace v8::internal::wasm
 
#endif  // V8_WASM_PGO_H_