Imported Upstream version 5.18.0.205

Former-commit-id: 7f59f7e792705db773f1caecdaa823092f4e2927

external/llvm/tools/lli/ChildTarget/CMakeLists.txt

@@ -0,0 +1,13 @@
+set(LLVM_LINK_COMPONENTS
+  OrcJIT
+  RuntimeDyld
+  Support
+  )
+
+add_llvm_utility(lli-child-target
+  ChildTarget.cpp
+
+  DEPENDS
+  intrinsics_gen
+)
+

external/llvm/tools/lli/ChildTarget/ChildTarget.cpp

@@ -0,0 +1,67 @@
+#include "llvm/ExecutionEngine/Orc/OrcABISupport.h"
+#include "llvm/ExecutionEngine/Orc/OrcRemoteTargetServer.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/DynamicLibrary.h"
+#include "llvm/Support/Process.h"
+#include <sstream>
+
+#include "../RemoteJITUtils.h"
+
+using namespace llvm;
+using namespace llvm::orc;
+using namespace llvm::sys;
+
+#ifdef __x86_64__
+typedef OrcX86_64_SysV HostOrcArch;
+#else
+typedef OrcGenericABI HostOrcArch;
+#endif
+
+ExitOnError ExitOnErr;
+
+int main(int argc, char *argv[]) {
+
+  if (argc != 3) {
+    errs() << "Usage: " << argv[0] << " <input fd> <output fd>\n";
+    return 1;
+  }
+
+  ExitOnErr.setBanner(std::string(argv[0]) + ":");
+
+  int InFD;
+  int OutFD;
+  {
+    std::istringstream InFDStream(argv[1]), OutFDStream(argv[2]);
+    InFDStream >> InFD;
+    OutFDStream >> OutFD;
+  }
+
+  if (sys::DynamicLibrary::LoadLibraryPermanently(nullptr)) {
+    errs() << "Error loading program symbols.\n";
+    return 1;
+  }
+
+  auto SymbolLookup = [](const std::string &Name) {
+    return RTDyldMemoryManager::getSymbolAddressInProcess(Name);
+  };
+
+  auto RegisterEHFrames = [](uint8_t *Addr, uint32_t Size) {
+    RTDyldMemoryManager::registerEHFramesInProcess(Addr, Size);
+  };
+
+  auto DeregisterEHFrames = [](uint8_t *Addr, uint32_t Size) {
+    RTDyldMemoryManager::deregisterEHFramesInProcess(Addr, Size);
+  };
+
+  FDRawChannel Channel(InFD, OutFD);
+  typedef remote::OrcRemoteTargetServer<FDRawChannel, HostOrcArch> JITServer;
+  JITServer Server(Channel, SymbolLookup, RegisterEHFrames, DeregisterEHFrames);
+
+  while (!Server.receivedTerminate())
+    ExitOnErr(Server.handleOne());
+
+  close(InFD);
+  close(OutFD);
+
+  return 0;
+}

external/llvm/tools/lli/ChildTarget/LLVMBuild.txt

@@ -0,0 +1,21 @@
+;===- ./tools/lli/ChildTarget/LLVMBuild.txt --------------------*- Conf -*--===;
+;
+;                     The LLVM Compiler Infrastructure
+;
+; This file is distributed under the University of Illinois Open Source
+; License. See LICENSE.TXT for details.
+;
+;===------------------------------------------------------------------------===;
+;
+; This is an LLVMBuild description file for the components in this subdirectory.
+;
+; For more information on the LLVMBuild system, please see:
+;
+;   http://llvm.org/docs/LLVMBuild.html
+;
+;===------------------------------------------------------------------------===;
+
+[component_0]
+type = Tool
+name = lli-child-target
+parent = lli