llvm/lib/ExecutionEngine/Orc/EPCDebugObjectRegistrar.cpp

   1 //===----- EPCDebugObjectRegistrar.cpp - EPC-based debug registration -----===//
   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 #include "llvm/ExecutionEngine/Orc/EPCDebugObjectRegistrar.h"
  10
  11 #include "llvm/ExecutionEngine/Orc/Core.h"
  12 #include "llvm/ExecutionEngine/Orc/Shared/SimplePackedSerialization.h"
  13 #include "llvm/ExecutionEngine/Orc/TargetProcess/JITLoaderGDB.h"
  14 #include "llvm/Support/BinaryStreamWriter.h"
  15
  16 namespace llvm {
  17 namespace orc {
  18
  19 Expected<std::unique_ptr<EPCDebugObjectRegistrar>>
  20 createJITLoaderGDBRegistrar(ExecutionSession &ES) {
  21   auto &EPC = ES.getExecutorProcessControl();
  22   auto ProcessHandle = EPC.loadDylib(nullptr);
  23   if (!ProcessHandle)
  24     return ProcessHandle.takeError();
  25
  26   SymbolStringPtr RegisterFn =
  27       EPC.getTargetTriple().isOSBinFormatMachO()
  28           ? EPC.intern("_llvm_orc_registerJITLoaderGDBWrapper")
  29           : EPC.intern("llvm_orc_registerJITLoaderGDBWrapper");
  30
  31   SymbolLookupSet RegistrationSymbols;
  32   RegistrationSymbols.add(RegisterFn);
  33
  34   auto Result = EPC.lookupSymbols({{*ProcessHandle, RegistrationSymbols}});
  35   if (!Result)
  36     return Result.takeError();
  37
  38   assert(Result->size() == 1 && "Unexpected number of dylibs in result");
  39   assert((*Result)[0].size() == 1 &&
  40          "Unexpected number of addresses in result");
  41
  42   return std::make_unique<EPCDebugObjectRegistrar>(ES, (*Result)[0][0]);
  43 }
  44
  45 Error EPCDebugObjectRegistrar::registerDebugObject(sys::MemoryBlock TargetMem) {
  46   return ES.callSPSWrapper<void(SPSExecutorAddress, uint64_t)>(
  47       RegisterFn, ExecutorAddress::fromPtr(TargetMem.base()),
  48       static_cast<uint64_t>(TargetMem.allocatedSize()));
  49 }
  50
  51 } // namespace orc
  52 } // namespace llvm