contrib/llvm-project/llvm/tools/lli/ChildTarget/ChildTarget.cpp

   1 #include "llvm/ExecutionEngine/Orc/OrcABISupport.h"
   2 #include "llvm/ExecutionEngine/Orc/OrcRemoteTargetServer.h"
   3 #include "llvm/Support/Debug.h"
   4 #include "llvm/Support/DynamicLibrary.h"
   5 #include "llvm/Support/Process.h"
   6 #include <sstream>
   7
   8 #include "../RemoteJITUtils.h"
   9
  10 using namespace llvm;
  11 using namespace llvm::orc;
  12 using namespace llvm::sys;
  13
  14 #ifdef __x86_64__
  15 typedef OrcX86_64_SysV HostOrcArch;
  16 #else
  17 typedef OrcGenericABI HostOrcArch;
  18 #endif
  19
  20 ExitOnError ExitOnErr;
  21
  22 int main(int argc, char *argv[]) {
  23
  24   if (argc != 3) {
  25     errs() << "Usage: " << argv[0] << " <input fd> <output fd>\n";
  26     return 1;
  27   }
  28
  29   ExitOnErr.setBanner(std::string(argv[0]) + ":");
  30
  31   int InFD;
  32   int OutFD;
  33   {
  34     std::istringstream InFDStream(argv[1]), OutFDStream(argv[2]);
  35     InFDStream >> InFD;
  36     OutFDStream >> OutFD;
  37   }
  38
  39   if (sys::DynamicLibrary::LoadLibraryPermanently(nullptr)) {
  40     errs() << "Error loading program symbols.\n";
  41     return 1;
  42   }
  43
  44   auto SymbolLookup = [](const std::string &Name) {
  45     return RTDyldMemoryManager::getSymbolAddressInProcess(Name);
  46   };
  47
  48   auto RegisterEHFrames = [](uint8_t *Addr, uint32_t Size) {
  49     RTDyldMemoryManager::registerEHFramesInProcess(Addr, Size);
  50   };
  51
  52   auto DeregisterEHFrames = [](uint8_t *Addr, uint32_t Size) {
  53     RTDyldMemoryManager::deregisterEHFramesInProcess(Addr, Size);
  54   };
  55
  56   FDRawChannel Channel(InFD, OutFD);
  57   typedef remote::OrcRemoteTargetServer<FDRawChannel, HostOrcArch> JITServer;
  58   JITServer Server(Channel, SymbolLookup, RegisterEHFrames, DeregisterEHFrames);
  59
  60   while (!Server.receivedTerminate())
  61     ExitOnErr(Server.handleOne());
  62
  63   close(InFD);
  64   close(OutFD);
  65
  66   return 0;
  67 }