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[ORC] Break up OrcJIT library, add Orc-RPC based remote TargetProcessControl

Authored by lhames on Nov 10 2020, 4:55 PM.

Description

[ORC] Break up OrcJIT library, add Orc-RPC based remote TargetProcessControl
implementation.

This patch aims to improve support for out-of-process JITing using OrcV2. It
introduces two new class templates, OrcRPCTargetProcessControlBase and
OrcRPCTPCServer, which together implement the TargetProcessControl API by
forwarding operations to an execution process via an Orc-RPC Endpoint. These
utilities are used to implement out-of-process JITing from llvm-jitlink to
a new llvm-jitlink-executor tool.

This patch also breaks the OrcJIT library into three parts:

  • OrcTargetProcess: Contains code needed by the JIT execution process.
  • OrcShared: Contains code needed by the JIT execution and compiler processes
  • OrcJIT: Everything else.

This break-up allows JIT executor processes to link against OrcTargetProcess
and OrcShared only, without having to link in all of OrcJIT. Clients executing
JIT'd code in-process should start linking against OrcTargetProcess as well as
OrcJIT.

In the near future these changes will enable:

  • Removal of the OrcRemoteTargetClient/OrcRemoteTargetServer class templates which provided similar functionality in OrcV1.
  • Restoration of Chapter 5 of the Building-A-JIT tutorial series, which will serve as a simple usage example for these APIs.
  • Implementation of lazy, cross-target compilation in lli's -jit-kind=orc-lazy mode.

Details

Committed
lhamesNov 12 2020, 10:05 PM
Parents
rG9606ef03f039: [AsmPrinter] fix -disable-debug-info option
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