executable.h

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

#ifndef TVM_RUNTIME_VM_EXECUTABLE_H_
#define TVM_RUNTIME_VM_EXECUTABLE_H_

#include <tvm/runtime/container/map.h>
#include <tvm/runtime/container/string.h>
#include <tvm/runtime/module.h>
#include <tvm/runtime/object.h>
#include <tvm/runtime/packed_func.h>
#include <tvm/runtime/vm/bytecode.h>

#include <map>
#include <string>
#include <unordered_map>
#include <vector>

namespace tvm {
namespace runtime {
namespace vm {

struct VMFunction;

class Executable : public ModuleNode {
 public:
  PackedFunc GetFunction(const std::string& name, const ObjectPtr<Object>& sptr_to_self) final;

  void SaveToBinary(dmlc::Stream* stream) final;

  void SaveToFile(const std::string& path, const std::string& format) final;

  TVMByteArray Save();

  static runtime::Module Load(const std::string& code, const runtime::Module lib);

  void MoveLateBoundConstantsToStream(dmlc::Stream* stream, size_t byte_limit);

  void MoveLateBoundConstantsToFile(const std::string& path, size_t byte_limit);

  void LoadLateBoundConstantsFromStream(dmlc::Stream* stream);

  void LoadLateBoundConstantsFromFile(const std::string& path);

  std::string GetBytecode() const;

  std::string GetConstants() const;

  std::string GetVirtualDevices() const;

  std::string GetPrimitives() const;

  std::string Stats() const;

  runtime::Module GetLib() const;

  void SetLib(const runtime::Module& lib);

  const VMFunction& GetVMFunctionWithName(const std::string& func_name) const;

  int GetFunctionArity(std::string func) const;

  std::string GetFunctionParameterName(std::string func, uint32_t index) const;

  virtual ~Executable() {}

  const char* type_key() const final { return "VMExecutable"; }

  std::vector<Device> virtual_devices;
  int host_device_index = -1;
  std::vector<ObjectRef> constants;
  std::vector<String> late_bound_constant_names;

  std::unordered_map<std::string, Index> global_map;
  std::unordered_map<std::string, Index> primitive_map;
  std::map<Index, Map<String, ObjectRef>> op_attrs;
  std::vector<VMFunction> functions;
  std::vector<Index> const_device_indexes;

 private:
  void SaveVirtualDevicesSection(dmlc::Stream* strm);

  void SaveGlobalSection(dmlc::Stream* strm);

  void SaveConstantSection(dmlc::Stream* stream);

  void LoadConstantSection(dmlc::Stream* stream);

  void SavePrimitiveOpNames(dmlc::Stream* strm);

  void SaveCodeSection(dmlc::Stream* strm);

  void LoadVirtualDevicesSection(dmlc::Stream* strm);

  void LoadGlobalSection(dmlc::Stream* strm);

  void LoadPrimitiveOpNames(dmlc::Stream* strm);

  void LoadCodeSection(dmlc::Stream* strm);

  std::string code_;
};

}  // namespace vm
}  // namespace runtime
}  // namespace tvm

#endif  // TVM_RUNTIME_VM_EXECUTABLE_H_