C++ OwningPtr::stop方法代码示例

//.........这里部分代码省略.........
        Function *Fn = &*I;
        if (Fn != EntryFn && !Fn->isDeclaration())
          EE->getPointerToFunction(Fn);
      }
    }

    // Trigger compilation separately so code regions that need to be
    // invalidated will be known.
    (void)EE->getPointerToFunction(EntryFn);
    // Clear instruction cache before code will be executed.
    if (RTDyldMM)
      static_cast<SectionMemoryManager*>(RTDyldMM)->invalidateInstructionCache();

    // Run main.
    Result = EE->runFunctionAsMain(EntryFn, InputArgv, envp);

    // Run static destructors.
    EE->runStaticConstructorsDestructors(true);

    // If the program didn't call exit explicitly, we should call it now.
    // This ensures that any atexit handlers get called correctly.
    if (Function *ExitF = dyn_cast<Function>(Exit)) {
      std::vector<GenericValue> Args;
      GenericValue ResultGV;
      ResultGV.IntVal = APInt(32, Result);
      Args.push_back(ResultGV);
      EE->runFunction(ExitF, Args);
      errs() << "ERROR: exit(" << Result << ") returned!\n";
      abort();
    } else {
      errs() << "ERROR: exit defined with wrong prototype!\n";
      abort();
    }
  } else {
    // else == "if (RemoteMCJIT)"

    // Remote target MCJIT doesn't (yet) support static constructors. No reason
    // it couldn't. This is a limitation of the LLI implemantation, not the
    // MCJIT itself. FIXME.
    //
    RemoteMemoryManager *MM = static_cast<RemoteMemoryManager*>(RTDyldMM);
    // Everything is prepared now, so lay out our program for the target
    // address space, assign the section addresses to resolve any relocations,
    // and send it to the target.

    OwningPtr<RemoteTarget> Target;
    if (!ChildExecPath.empty()) { // Remote execution on a child process
      if (!RemoteTarget::hostSupportsExternalRemoteTarget()) {
        errs() << "Warning: host does not support external remote targets.\n"
               << "  Defaulting to simulated remote execution\n";
        Target.reset(RemoteTarget::createRemoteTarget());
      } else {
        if (!sys::fs::can_execute(ChildExecPath)) {
          errs() << "Unable to find usable child executable: '" << ChildExecPath
                 << "'\n";
          return -1;
        }
        Target.reset(RemoteTarget::createExternalRemoteTarget(ChildExecPath));
      }
    } else {
      // No child process name provided, use simulated remote execution.
      Target.reset(RemoteTarget::createRemoteTarget());
    }

    // Give the memory manager a pointer to our remote target interface object.
    MM->setRemoteTarget(Target.get());

    // Create the remote target.
    if (!Target->create()) {
      errs() << "ERROR: " << Target->getErrorMsg() << "\n";
      return EXIT_FAILURE;
    }

    // Since we're executing in a (at least simulated) remote address space,
    // we can't use the ExecutionEngine::runFunctionAsMain(). We have to
    // grab the function address directly here and tell the remote target
    // to execute the function.
    //
    // Our memory manager will map generated code into the remote address
    // space as it is loaded and copy the bits over during the finalizeMemory
    // operation.
    //
    // FIXME: argv and envp handling.
    uint64_t Entry = EE->getFunctionAddress(EntryFn->getName().str());

    DEBUG(dbgs() << "Executing '" << EntryFn->getName() << "' at 0x"
                 << format("%llx", Entry) << "\n");

    if (!Target->executeCode(Entry, Result))
      errs() << "ERROR: " << Target->getErrorMsg() << "\n";

    // Like static constructors, the remote target MCJIT support doesn't handle
    // this yet. It could. FIXME.

    // Stop the remote target
    Target->stop();
  }

  return Result;
}