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  1. //===- EPCGenericJITLinkMemoryManager.h - EPC-based mem manager -*- C++ -*-===//
  2. //
  3. // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  4. // See https://llvm.org/LICENSE.txt for license information.
  5. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  6. //
  7. //===----------------------------------------------------------------------===//
  8. //
  9. // Implements JITLinkMemoryManager by making remove calls via
  10. // ExecutorProcessControl::callWrapperAsync.
  11. //
  12. // This simplifies the implementaton of new ExecutorProcessControl instances,
  13. // as this implementation will always work (at the cost of some performance
  14. // overhead for the calls).
  15. //
  16. //===----------------------------------------------------------------------===//
  17.  
  18. #ifndef LLVM_EXECUTIONENGINE_ORC_EPCGENERICJITLINKMEMORYMANAGER_H
  19. #define LLVM_EXECUTIONENGINE_ORC_EPCGENERICJITLINKMEMORYMANAGER_H
  20.  
  21. #include "llvm/ExecutionEngine/JITLink/JITLinkMemoryManager.h"
  22. #include "llvm/ExecutionEngine/Orc/Core.h"
  23.  
  24. namespace llvm {
  25. namespace orc {
  26.  
  27. class EPCGenericJITLinkMemoryManager : public jitlink::JITLinkMemoryManager {
  28. public:
  29.   /// Function addresses for memory access.
  30.   struct SymbolAddrs {
  31.     ExecutorAddr Allocator;
  32.     ExecutorAddr Reserve;
  33.     ExecutorAddr Finalize;
  34.     ExecutorAddr Deallocate;
  35.   };
  36.  
  37.   /// Create an EPCGenericJITLinkMemoryManager instance from a given set of
  38.   /// function addrs.
  39.   EPCGenericJITLinkMemoryManager(ExecutorProcessControl &EPC, SymbolAddrs SAs)
  40.       : EPC(EPC), SAs(SAs) {}
  41.  
  42.   void allocate(const jitlink::JITLinkDylib *JD, jitlink::LinkGraph &G,
  43.                 OnAllocatedFunction OnAllocated) override;
  44.  
  45.   // Use overloads from base class.
  46.   using JITLinkMemoryManager::allocate;
  47.  
  48.   void deallocate(std::vector<FinalizedAlloc> Allocs,
  49.                   OnDeallocatedFunction OnDeallocated) override;
  50.  
  51.   // Use overloads from base class.
  52.   using JITLinkMemoryManager::deallocate;
  53.  
  54. private:
  55.   class InFlightAlloc;
  56.  
  57.   void completeAllocation(ExecutorAddr AllocAddr, jitlink::BasicLayout BL,
  58.                           OnAllocatedFunction OnAllocated);
  59.  
  60.   ExecutorProcessControl &EPC;
  61.   SymbolAddrs SAs;
  62. };
  63.  
  64. namespace shared {
  65.  
  66. /// FIXME: This specialization should be moved into TargetProcessControlTypes.h
  67. ///        (or whereever those types get merged to) once ORC depends on JITLink.
  68. template <>
  69. class SPSSerializationTraits<SPSExecutorAddr,
  70.                              jitlink::JITLinkMemoryManager::FinalizedAlloc> {
  71. public:
  72.   static size_t size(const jitlink::JITLinkMemoryManager::FinalizedAlloc &FA) {
  73.     return SPSArgList<SPSExecutorAddr>::size(ExecutorAddr(FA.getAddress()));
  74.   }
  75.  
  76.   static bool
  77.   serialize(SPSOutputBuffer &OB,
  78.             const jitlink::JITLinkMemoryManager::FinalizedAlloc &FA) {
  79.     return SPSArgList<SPSExecutorAddr>::serialize(
  80.         OB, ExecutorAddr(FA.getAddress()));
  81.   }
  82.  
  83.   static bool deserialize(SPSInputBuffer &IB,
  84.                           jitlink::JITLinkMemoryManager::FinalizedAlloc &FA) {
  85.     ExecutorAddr A;
  86.     if (!SPSArgList<SPSExecutorAddr>::deserialize(IB, A))
  87.       return false;
  88.     FA = jitlink::JITLinkMemoryManager::FinalizedAlloc(A);
  89.     return true;
  90.   }
  91. };
  92.  
  93. } // end namespace shared
  94. } // end namespace orc
  95. } // end namespace llvm
  96.  
  97. #endif // LLVM_EXECUTIONENGINE_ORC_EPCGENERICJITLINKMEMORYMANAGER_H
  98.