SimpleExecutorDylibManager.h

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//===--------------- SimpleExecutorDylibManager.h ---------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// A simple dynamic library management class. Allows dynamic libraries to be
// loaded and searched.
//
// FIXME: The functionality in this file should be moved to the ORC runtime.
//
//===----------------------------------------------------------------------===//
 
#ifndef LLVM_EXECUTIONENGINE_ORC_TARGETPROCESS_SIMPLEEXECUTORDYLIBMANAGER_H
#define LLVM_EXECUTIONENGINE_ORC_TARGETPROCESS_SIMPLEEXECUTORDYLIBMANAGER_H
 
#include "llvm/ADT/DenseMap.h"
#include "llvm/ExecutionEngine/Orc/Shared/ExecutorAddress.h"
#include "llvm/ExecutionEngine/Orc/Shared/SimpleRemoteEPCUtils.h"
#include "llvm/ExecutionEngine/Orc/Shared/TargetProcessControlTypes.h"
#include "llvm/ExecutionEngine/Orc/Shared/WrapperFunctionUtils.h"
#include "llvm/ExecutionEngine/Orc/TargetProcess/ExecutorBootstrapService.h"
#include "llvm/Support/DynamicLibrary.h"
#include "llvm/Support/Error.h"
 
#include <mutex>
 
namespace llvm {
namespace orc {
namespace rt_bootstrap {
 
/// Simple page-based allocator.
class SimpleExecutorDylibManager : public ExecutorBootstrapService {
public:
  virtual ~SimpleExecutorDylibManager();
 
  Expected<tpctypes::DylibHandle> open(const std::string &Path, uint64_t Mode);
  Expected<std::vector<ExecutorAddr>> lookup(tpctypes::DylibHandle H,
                                             const RemoteSymbolLookupSet &L);
 
  Error shutdown() override;
  void addBootstrapSymbols(StringMap<ExecutorAddr> &M) override;
 
private:
  using DylibsMap = DenseMap<uint64_t, sys::DynamicLibrary>;
 
  static llvm::orc::shared::CWrapperFunctionResult
  openWrapper(const char *ArgData, size_t ArgSize);
 
  static llvm::orc::shared::CWrapperFunctionResult
  lookupWrapper(const char *ArgData, size_t ArgSize);
 
  std::mutex M;
  uint64_t NextId = 0;
  DylibsMap Dylibs;
};
 
} // end namespace rt_bootstrap
} // end namespace orc
} // end namespace llvm
 
#endif // LLVM_EXECUTIONENGINE_ORC_TARGETPROCESS_SIMPLEEXECUTORDYLIBMANAGER_H