[all-commits] [llvm/llvm-project] 78b083: [ORC] Add finalization & deallocation actions, Sim...

[lhames via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 78b083dbb725e1ec568d1b8ee523f5f025d25798
      https://github.com/llvm/llvm-project/commit/78b083dbb725e1ec568d1b8ee523f5f025d25798
  Author: Lang Hames <lhames at gmail.com>
  Date:   2021-09-17 (Fri, 17 Sep 2021)

  Changed paths:
    M llvm/include/llvm/ExecutionEngine/Orc/EPCGenericJITLinkMemoryManager.h
    M llvm/include/llvm/ExecutionEngine/Orc/Shared/OrcRTBridge.h
    M llvm/include/llvm/ExecutionEngine/Orc/Shared/TargetProcessControlTypes.h
    A llvm/include/llvm/ExecutionEngine/Orc/TargetProcess/ExecutorBootstrapService.h
    A llvm/include/llvm/ExecutionEngine/Orc/TargetProcess/SimpleExecutorMemoryManager.h
    M llvm/include/llvm/ExecutionEngine/Orc/TargetProcess/SimpleRemoteEPCServer.h
    M llvm/lib/ExecutionEngine/Orc/EPCGenericJITLinkMemoryManager.cpp
    M llvm/lib/ExecutionEngine/Orc/Shared/OrcRTBridge.cpp
    M llvm/lib/ExecutionEngine/Orc/SimpleRemoteEPC.cpp
    M llvm/lib/ExecutionEngine/Orc/TargetProcess/CMakeLists.txt
    M llvm/lib/ExecutionEngine/Orc/TargetProcess/OrcRTBootstrap.cpp
    A llvm/lib/ExecutionEngine/Orc/TargetProcess/SimpleExecutorMemoryManager.cpp
    M llvm/lib/ExecutionEngine/Orc/TargetProcess/SimpleRemoteEPCServer.cpp
    M llvm/tools/llvm-jitlink/llvm-jitlink-executor/llvm-jitlink-executor.cpp
    M llvm/unittests/ExecutionEngine/Orc/CMakeLists.txt
    M llvm/unittests/ExecutionEngine/Orc/EPCGenericJITLinkMemoryManagerTest.cpp
    A llvm/unittests/ExecutionEngine/Orc/SimpleExecutorMemoryManagerTest.cpp

  Log Message:
  -----------
  [ORC] Add finalization & deallocation actions, SimpleExecutorMemoryManager class

Finalization and deallocation actions are a key part of the upcoming
JITLinkMemoryManager redesign: They generalize the existing finalization and
deallocate concepts (basically "copy-and-mprotect", and "munmap") to include
support for arbitrary registration and deregistration of parts of JIT linked
code. This allows us to register and deregister eh-frames, TLV sections,
language metadata, etc. using regular memory management calls with no additional
IPC/RPC overhead, which should both improve JIT performance and simplify
interactions between ORC and the ORC runtime.

The SimpleExecutorMemoryManager class provides executor-side support for memory
management operations, including finalization and deallocation actions.

This support is being added in advance of the rest of the memory manager
redesign as it will simplify the introduction of an EPC based
RuntimeDyld::MemoryManager (since eh-frame registration/deregistration will be
expressible as actions). The new RuntimeDyld::MemoryManager will in turn allow
us to remove older remote allocators that are blocking the rest of the memory
manager changes.