1 files changed, 624 insertions, 0 deletions
diff --git a/contrib/llvm-project/compiler-rt/lib/orc/elfnix_platform.cpp b/contrib/llvm-project/compiler-rt/lib/orc/elfnix_platform.cpp
new file mode 100644
index 000000000000..c087e71038f9
--- /dev/null
+++ b/contrib/llvm-project/compiler-rt/lib/orc/elfnix_platform.cpp
@@ -0,0 +1,624 @@
+//===- elfnix_platform.cpp ------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This file contains code required to load the rest of the ELF-on-*IX runtime.
+//
+//===----------------------------------------------------------------------===//
+
+#include "elfnix_platform.h"
+#include "common.h"
+#include "compiler.h"
+#include "error.h"
+#include "wrapper_function_utils.h"
+
+#include <algorithm>
+#include <map>
+#include <mutex>
+#include <sstream>
+#include <string_view>
+#include <unordered_map>
+#include <vector>
+
+using namespace __orc_rt;
+using namespace __orc_rt::elfnix;
+
+// Declare function tags for functions in the JIT process.
+ORC_RT_JIT_DISPATCH_TAG(__orc_rt_elfnix_get_initializers_tag)
+ORC_RT_JIT_DISPATCH_TAG(__orc_rt_elfnix_get_deinitializers_tag)
+ORC_RT_JIT_DISPATCH_TAG(__orc_rt_elfnix_symbol_lookup_tag)
+
+// eh-frame registration functions, made available via aliases
+// installed by the Platform
+extern "C" void __register_frame(const void *);
+extern "C" void __deregister_frame(const void *);
+
+extern "C" void
+__unw_add_dynamic_eh_frame_section(const void *) ORC_RT_WEAK_IMPORT;
+extern "C" void
+__unw_remove_dynamic_eh_frame_section(const void *) ORC_RT_WEAK_IMPORT;
+
+namespace {
+
+Error validatePointerSectionExtent(const char *SectionName,
+                                   const ExecutorAddrRange &SE) {
+  if (SE.size() % sizeof(uintptr_t)) {
+    std::ostringstream ErrMsg;
+    ErrMsg << std::hex << "Size of " << SectionName << " 0x"
+           << SE.Start.getValue() << " -- 0x" << SE.End.getValue()
+           << " is not a pointer multiple";
+    return make_error<StringError>(ErrMsg.str());
+  }
+  return Error::success();
+}
+
+Error runInitArray(const std::vector<ExecutorAddrRange> &InitArraySections,
+                   const ELFNixJITDylibInitializers &MOJDIs) {
+
+  for (const auto &ModInits : InitArraySections) {
+    if (auto Err = validatePointerSectionExtent(".init_array", ModInits))
+      return Err;
+
+    using InitFunc = void (*)();
+    for (auto *Init : ModInits.toSpan<InitFunc>())
+      (*Init)();
+  }
+
+  return Error::success();
+}
+
+struct TLSInfoEntry {
+  unsigned long Key = 0;
+  unsigned long DataAddress = 0;
+};
+
+struct TLSDescriptor {
+  void (*Resolver)(void *);
+  TLSInfoEntry *InfoEntry;
+};
+
+class ELFNixPlatformRuntimeState {
+private:
+  struct AtExitEntry {
+    void (*Func)(void *);
+    void *Arg;
+  };
+
+  using AtExitsVector = std::vector<AtExitEntry>;
+
+  struct PerJITDylibState {
+    void *Header = nullptr;
+    size_t RefCount = 0;
+    bool AllowReinitialization = false;
+    AtExitsVector AtExits;
+  };
+
+public:
+  static void initialize(void *DSOHandle);
+  static ELFNixPlatformRuntimeState &get();
+  static void destroy();
+
+  ELFNixPlatformRuntimeState(void *DSOHandle);
+
+  // Delete copy and move constructors.
+  ELFNixPlatformRuntimeState(const ELFNixPlatformRuntimeState &) = delete;
+  ELFNixPlatformRuntimeState &
+  operator=(const ELFNixPlatformRuntimeState &) = delete;
+  ELFNixPlatformRuntimeState(ELFNixPlatformRuntimeState &&) = delete;
+  ELFNixPlatformRuntimeState &operator=(ELFNixPlatformRuntimeState &&) = delete;
+
+  Error registerObjectSections(ELFNixPerObjectSectionsToRegister POSR);
+  Error deregisterObjectSections(ELFNixPerObjectSectionsToRegister POSR);
+
+  const char *dlerror();
+  void *dlopen(std::string_view Name, int Mode);
+  int dlclose(void *DSOHandle);
+  void *dlsym(void *DSOHandle, std::string_view Symbol);
+
+  int registerAtExit(void (*F)(void *), void *Arg, void *DSOHandle);
+  void runAtExits(void *DSOHandle);
+
+  /// Returns the base address of the section containing ThreadData.
+  Expected<std::pair<const char *, size_t>>
+  getThreadDataSectionFor(const char *ThreadData);
+
+  void *getPlatformJDDSOHandle() { return PlatformJDDSOHandle; }
+
+private:
+  PerJITDylibState *getJITDylibStateByHeaderAddr(void *DSOHandle);
+  PerJITDylibState *getJITDylibStateByName(std::string_view Path);
+  PerJITDylibState &
+  getOrCreateJITDylibState(ELFNixJITDylibInitializers &MOJDIs);
+
+  Error registerThreadDataSection(span<const char> ThreadDataSection);
+
+  Expected<ExecutorAddr> lookupSymbolInJITDylib(void *DSOHandle,
+                                                std::string_view Symbol);
+
+  Expected<ELFNixJITDylibInitializerSequence>
+  getJITDylibInitializersByName(std::string_view Path);
+  Expected<void *> dlopenInitialize(std::string_view Path, int Mode);
+  Error initializeJITDylib(ELFNixJITDylibInitializers &MOJDIs);
+
+  static ELFNixPlatformRuntimeState *MOPS;
+
+  void *PlatformJDDSOHandle;
+
+  // Frame registration functions:
+  void (*registerEHFrameSection)(const void *) = nullptr;
+  void (*deregisterEHFrameSection)(const void *) = nullptr;
+
+  // FIXME: Move to thread-state.
+  std::string DLFcnError;
+
+  std::recursive_mutex JDStatesMutex;
+  std::unordered_map<void *, PerJITDylibState> JDStates;
+  std::unordered_map<std::string, void *> JDNameToHeader;
+
+  std::mutex ThreadDataSectionsMutex;
+  std::map<const char *, size_t> ThreadDataSections;
+};
+
+ELFNixPlatformRuntimeState *ELFNixPlatformRuntimeState::MOPS = nullptr;
+
+void ELFNixPlatformRuntimeState::initialize(void *DSOHandle) {
+  assert(!MOPS && "ELFNixPlatformRuntimeState should be null");
+  MOPS = new ELFNixPlatformRuntimeState(DSOHandle);
+}
+
+ELFNixPlatformRuntimeState &ELFNixPlatformRuntimeState::get() {
+  assert(MOPS && "ELFNixPlatformRuntimeState not initialized");
+  return *MOPS;
+}
+
+void ELFNixPlatformRuntimeState::destroy() {
+  assert(MOPS && "ELFNixPlatformRuntimeState not initialized");
+  delete MOPS;
+}
+
+ELFNixPlatformRuntimeState::ELFNixPlatformRuntimeState(void *DSOHandle)
+    : PlatformJDDSOHandle(DSOHandle) {
+  if (__unw_add_dynamic_eh_frame_section &&
+      __unw_remove_dynamic_eh_frame_section) {
+    registerEHFrameSection = __unw_add_dynamic_eh_frame_section;
+    deregisterEHFrameSection = __unw_remove_dynamic_eh_frame_section;
+  } else {
+    registerEHFrameSection = __register_frame;
+    deregisterEHFrameSection = __deregister_frame;
+  }
+}
+
+Error ELFNixPlatformRuntimeState::registerObjectSections(
+    ELFNixPerObjectSectionsToRegister POSR) {
+  if (POSR.EHFrameSection.Start)
+    registerEHFrameSection(POSR.EHFrameSection.Start.toPtr<const char *>());
+
+  if (POSR.ThreadDataSection.Start) {
+    if (auto Err = registerThreadDataSection(
+            POSR.ThreadDataSection.toSpan<const char>()))
+      return Err;
+  }
+
+  return Error::success();
+}
+
+Error ELFNixPlatformRuntimeState::deregisterObjectSections(
+    ELFNixPerObjectSectionsToRegister POSR) {
+  if (POSR.EHFrameSection.Start)
+    deregisterEHFrameSection(POSR.EHFrameSection.Start.toPtr<const char *>());
+
+  return Error::success();
+}
+
+const char *ELFNixPlatformRuntimeState::dlerror() { return DLFcnError.c_str(); }
+
+void *ELFNixPlatformRuntimeState::dlopen(std::string_view Path, int Mode) {
+  std::lock_guard<std::recursive_mutex> Lock(JDStatesMutex);
+
+  // Use fast path if all JITDylibs are already loaded and don't require
+  // re-running initializers.
+  if (auto *JDS = getJITDylibStateByName(Path)) {
+    if (!JDS->AllowReinitialization) {
+      ++JDS->RefCount;
+      return JDS->Header;
+    }
+  }
+
+  auto H = dlopenInitialize(Path, Mode);
+  if (!H) {
+    DLFcnError = toString(H.takeError());
+    return nullptr;
+  }
+
+  return *H;
+}
+
+int ELFNixPlatformRuntimeState::dlclose(void *DSOHandle) {
+  runAtExits(DSOHandle);
+  return 0;
+}
+
+void *ELFNixPlatformRuntimeState::dlsym(void *DSOHandle,
+                                        std::string_view Symbol) {
+  auto Addr = lookupSymbolInJITDylib(DSOHandle, Symbol);
+  if (!Addr) {
+    DLFcnError = toString(Addr.takeError());
+    return 0;
+  }
+
+  return Addr->toPtr<void *>();
+}
+
+int ELFNixPlatformRuntimeState::registerAtExit(void (*F)(void *), void *Arg,
+                                               void *DSOHandle) {
+  // FIXME: Handle out-of-memory errors, returning -1 if OOM.
+  std::lock_guard<std::recursive_mutex> Lock(JDStatesMutex);
+  auto *JDS = getJITDylibStateByHeaderAddr(DSOHandle);
+  assert(JDS && "JITDylib state not initialized");
+  JDS->AtExits.push_back({F, Arg});
+  return 0;
+}
+
+void ELFNixPlatformRuntimeState::runAtExits(void *DSOHandle) {
+  // FIXME: Should atexits be allowed to run concurrently with access to
+  // JDState?
+  AtExitsVector V;
+  {
+    std::lock_guard<std::recursive_mutex> Lock(JDStatesMutex);
+    auto *JDS = getJITDylibStateByHeaderAddr(DSOHandle);
+    assert(JDS && "JITDlybi state not initialized");
+    std::swap(V, JDS->AtExits);
+  }
+
+  while (!V.empty()) {
+    auto &AE = V.back();
+    AE.Func(AE.Arg);
+    V.pop_back();
+  }
+}
+
+Expected<std::pair<const char *, size_t>>
+ELFNixPlatformRuntimeState::getThreadDataSectionFor(const char *ThreadData) {
+  std::lock_guard<std::mutex> Lock(ThreadDataSectionsMutex);
+  auto I = ThreadDataSections.upper_bound(ThreadData);
+  // Check that we have a valid entry conovering this address.
+  if (I == ThreadDataSections.begin())
+    return make_error<StringError>("No thread local data section for key");
+  I = std::prev(I);
+  if (ThreadData >= I->first + I->second)
+    return make_error<StringError>("No thread local data section for key");
+  return *I;
+}
+
+ELFNixPlatformRuntimeState::PerJITDylibState *
+ELFNixPlatformRuntimeState::getJITDylibStateByHeaderAddr(void *DSOHandle) {
+  auto I = JDStates.find(DSOHandle);
+  if (I == JDStates.end())
+    return nullptr;
+  return &I->second;
+}
+
+ELFNixPlatformRuntimeState::PerJITDylibState *
+ELFNixPlatformRuntimeState::getJITDylibStateByName(std::string_view Name) {
+  // FIXME: Avoid creating string copy here.
+  auto I = JDNameToHeader.find(std::string(Name.data(), Name.size()));
+  if (I == JDNameToHeader.end())
+    return nullptr;
+  void *H = I->second;
+  auto J = JDStates.find(H);
+  assert(J != JDStates.end() &&
+         "JITDylib has name map entry but no header map entry");
+  return &J->second;
+}
+
+ELFNixPlatformRuntimeState::PerJITDylibState &
+ELFNixPlatformRuntimeState::getOrCreateJITDylibState(
+    ELFNixJITDylibInitializers &MOJDIs) {
+  void *Header = MOJDIs.DSOHandleAddress.toPtr<void *>();
+
+  auto &JDS = JDStates[Header];
+
+  // If this entry hasn't been created yet.
+  if (!JDS.Header) {
+    assert(!JDNameToHeader.count(MOJDIs.Name) &&
+           "JITDylib has header map entry but no name map entry");
+    JDNameToHeader[MOJDIs.Name] = Header;
+    JDS.Header = Header;
+  }
+
+  return JDS;
+}
+
+Error ELFNixPlatformRuntimeState::registerThreadDataSection(
+    span<const char> ThreadDataSection) {
+  std::lock_guard<std::mutex> Lock(ThreadDataSectionsMutex);
+  auto I = ThreadDataSections.upper_bound(ThreadDataSection.data());
+  if (I != ThreadDataSections.begin()) {
+    auto J = std::prev(I);
+    if (J->first + J->second > ThreadDataSection.data())
+      return make_error<StringError>("Overlapping .tdata sections");
+  }
+  ThreadDataSections.insert(
+      I, std::make_pair(ThreadDataSection.data(), ThreadDataSection.size()));
+  return Error::success();
+}
+
+Expected<ExecutorAddr>
+ELFNixPlatformRuntimeState::lookupSymbolInJITDylib(void *DSOHandle,
+                                                   std::string_view Sym) {
+  Expected<ExecutorAddr> Result((ExecutorAddr()));
+  if (auto Err = WrapperFunction<SPSExpected<SPSExecutorAddr>(
+          SPSExecutorAddr, SPSString)>::call(&__orc_rt_elfnix_symbol_lookup_tag,
+                                             Result,
+                                             ExecutorAddr::fromPtr(DSOHandle),
+                                             Sym))
+    return std::move(Err);
+  return Result;
+}
+
+Expected<ELFNixJITDylibInitializerSequence>
+ELFNixPlatformRuntimeState::getJITDylibInitializersByName(
+    std::string_view Path) {
+  Expected<ELFNixJITDylibInitializerSequence> Result(
+      (ELFNixJITDylibInitializerSequence()));
+  std::string PathStr(Path.data(), Path.size());
+  if (auto Err =
+          WrapperFunction<SPSExpected<SPSELFNixJITDylibInitializerSequence>(
+              SPSString)>::call(&__orc_rt_elfnix_get_initializers_tag, Result,
+                                Path))
+    return std::move(Err);
+  return Result;
+}
+
+Expected<void *>
+ELFNixPlatformRuntimeState::dlopenInitialize(std::string_view Path, int Mode) {
+  // Either our JITDylib wasn't loaded, or it or one of its dependencies allows
+  // reinitialization. We need to call in to the JIT to see if there's any new
+  // work pending.
+  auto InitSeq = getJITDylibInitializersByName(Path);
+  if (!InitSeq)
+    return InitSeq.takeError();
+
+  // Init sequences should be non-empty.
+  if (InitSeq->empty())
+    return make_error<StringError>(
+        "__orc_rt_elfnix_get_initializers returned an "
+        "empty init sequence");
+
+  // Otherwise register and run initializers for each JITDylib.
+  for (auto &MOJDIs : *InitSeq)
+    if (auto Err = initializeJITDylib(MOJDIs))
+      return std::move(Err);
+
+  // Return the header for the last item in the list.
+  auto *JDS = getJITDylibStateByHeaderAddr(
+      InitSeq->back().DSOHandleAddress.toPtr<void *>());
+  assert(JDS && "Missing state entry for JD");
+  return JDS->Header;
+}
+
+long getPriority(const std::string &name) {
+  auto pos = name.find_last_not_of("0123456789");
+  if (pos == name.size() - 1)
+    return 65535;
+  else
+    return std::strtol(name.c_str() + pos + 1, nullptr, 10);
+}
+
+Error ELFNixPlatformRuntimeState::initializeJITDylib(
+    ELFNixJITDylibInitializers &MOJDIs) {
+
+  auto &JDS = getOrCreateJITDylibState(MOJDIs);
+  ++JDS.RefCount;
+
+  using SectionList = std::vector<ExecutorAddrRange>;
+  std::sort(MOJDIs.InitSections.begin(), MOJDIs.InitSections.end(),
+            [](const std::pair<std::string, SectionList> &LHS,
+               const std::pair<std::string, SectionList> &RHS) -> bool {
+              return getPriority(LHS.first) < getPriority(RHS.first);
+            });
+  for (auto &Entry : MOJDIs.InitSections)
+    if (auto Err = runInitArray(Entry.second, MOJDIs))
+      return Err;
+
+  return Error::success();
+}
+class ELFNixPlatformRuntimeTLVManager {
+public:
+  void *getInstance(const char *ThreadData);
+
+private:
+  std::unordered_map<const char *, char *> Instances;
+  std::unordered_map<const char *, std::unique_ptr<char[]>> AllocatedSections;
+};
+
+void *ELFNixPlatformRuntimeTLVManager::getInstance(const char *ThreadData) {
+  auto I = Instances.find(ThreadData);
+  if (I != Instances.end())
+    return I->second;
+  auto TDS =
+      ELFNixPlatformRuntimeState::get().getThreadDataSectionFor(ThreadData);
+  if (!TDS) {
+    __orc_rt_log_error(toString(TDS.takeError()).c_str());
+    return nullptr;
+  }
+
+  auto &Allocated = AllocatedSections[TDS->first];
+  if (!Allocated) {
+    Allocated = std::make_unique<char[]>(TDS->second);
+    memcpy(Allocated.get(), TDS->first, TDS->second);
+  }
+  size_t ThreadDataDelta = ThreadData - TDS->first;
+  assert(ThreadDataDelta <= TDS->second && "ThreadData outside section bounds");
+
+  char *Instance = Allocated.get() + ThreadDataDelta;
+  Instances[ThreadData] = Instance;
+  return Instance;
+}
+
+void destroyELFNixTLVMgr(void *ELFNixTLVMgr) {
+  delete static_cast<ELFNixPlatformRuntimeTLVManager *>(ELFNixTLVMgr);
+}
+
+} // end anonymous namespace
+
+//------------------------------------------------------------------------------
+//                             JIT entry points
+//------------------------------------------------------------------------------
+
+ORC_RT_INTERFACE orc_rt_CWrapperFunctionResult
+__orc_rt_elfnix_platform_bootstrap(char *ArgData, size_t ArgSize) {
+  return WrapperFunction<void(uint64_t)>::handle(
+             ArgData, ArgSize,
+             [](uint64_t &DSOHandle) {
+               ELFNixPlatformRuntimeState::initialize(
+                   reinterpret_cast<void *>(DSOHandle));
+             })
+      .release();
+}
+
+ORC_RT_INTERFACE orc_rt_CWrapperFunctionResult
+__orc_rt_elfnix_platform_shutdown(char *ArgData, size_t ArgSize) {
+  ELFNixPlatformRuntimeState::destroy();
+  return WrapperFunctionResult().release();
+}
+
+/// Wrapper function for registering metadata on a per-object basis.
+ORC_RT_INTERFACE orc_rt_CWrapperFunctionResult
+__orc_rt_elfnix_register_object_sections(char *ArgData, size_t ArgSize) {
+  return WrapperFunction<SPSError(SPSELFNixPerObjectSectionsToRegister)>::
+      handle(ArgData, ArgSize,
+             [](ELFNixPerObjectSectionsToRegister &POSR) {
+               return ELFNixPlatformRuntimeState::get().registerObjectSections(
+                   std::move(POSR));
+             })
+          .release();
+}
+
+/// Wrapper for releasing per-object metadat.
+ORC_RT_INTERFACE orc_rt_CWrapperFunctionResult
+__orc_rt_elfnix_deregister_object_sections(char *ArgData, size_t ArgSize) {
+  return WrapperFunction<SPSError(SPSELFNixPerObjectSectionsToRegister)>::
+      handle(ArgData, ArgSize,
+             [](ELFNixPerObjectSectionsToRegister &POSR) {
+               return ELFNixPlatformRuntimeState::get()
+                   .deregisterObjectSections(std::move(POSR));
+             })
+          .release();
+}
+
+//------------------------------------------------------------------------------
+//                           TLV support
+//------------------------------------------------------------------------------
+
+ORC_RT_INTERFACE void *__orc_rt_elfnix_tls_get_addr_impl(TLSInfoEntry *D) {
+  auto *TLVMgr = static_cast<ELFNixPlatformRuntimeTLVManager *>(
+      pthread_getspecific(D->Key));
+  if (!TLVMgr)
+    TLVMgr = new ELFNixPlatformRuntimeTLVManager();
+  if (pthread_setspecific(D->Key, TLVMgr)) {
+    __orc_rt_log_error("Call to pthread_setspecific failed");
+    return nullptr;
+  }
+
+  return TLVMgr->getInstance(
+      reinterpret_cast<char *>(static_cast<uintptr_t>(D->DataAddress)));
+}
+
+ORC_RT_INTERFACE ptrdiff_t ___orc_rt_elfnix_tlsdesc_resolver_impl(
+    TLSDescriptor *D, const char *ThreadPointer) {
+  const char *TLVPtr = reinterpret_cast<const char *>(
+      __orc_rt_elfnix_tls_get_addr_impl(D->InfoEntry));
+  return TLVPtr - ThreadPointer;
+}
+
+ORC_RT_INTERFACE orc_rt_CWrapperFunctionResult
+__orc_rt_elfnix_create_pthread_key(char *ArgData, size_t ArgSize) {
+  return WrapperFunction<SPSExpected<uint64_t>(void)>::handle(
+             ArgData, ArgSize,
+             []() -> Expected<uint64_t> {
+               pthread_key_t Key;
+               if (int Err = pthread_key_create(&Key, destroyELFNixTLVMgr)) {
+                 __orc_rt_log_error("Call to pthread_key_create failed");
+                 return make_error<StringError>(strerror(Err));
+               }
+               return static_cast<uint64_t>(Key);
+             })
+      .release();
+}
+
+//------------------------------------------------------------------------------
+//                           cxa_atexit support
+//------------------------------------------------------------------------------
+
+int __orc_rt_elfnix_cxa_atexit(void (*func)(void *), void *arg,
+                               void *dso_handle) {
+  return ELFNixPlatformRuntimeState::get().registerAtExit(func, arg,
+                                                          dso_handle);
+}
+
+int __orc_rt_elfnix_atexit(void (*func)(void *)) {
+  auto &PlatformRTState = ELFNixPlatformRuntimeState::get();
+  return ELFNixPlatformRuntimeState::get().registerAtExit(
+      func, NULL, PlatformRTState.getPlatformJDDSOHandle());
+}
+
+void __orc_rt_elfnix_cxa_finalize(void *dso_handle) {
+  ELFNixPlatformRuntimeState::get().runAtExits(dso_handle);
+}
+
+//------------------------------------------------------------------------------
+//                        JIT'd dlfcn alternatives.
+//------------------------------------------------------------------------------
+
+const char *__orc_rt_elfnix_jit_dlerror() {
+  return ELFNixPlatformRuntimeState::get().dlerror();
+}
+
+void *__orc_rt_elfnix_jit_dlopen(const char *path, int mode) {
+  return ELFNixPlatformRuntimeState::get().dlopen(path, mode);
+}
+
+int __orc_rt_elfnix_jit_dlclose(void *dso_handle) {
+  return ELFNixPlatformRuntimeState::get().dlclose(dso_handle);
+}
+
+void *__orc_rt_elfnix_jit_dlsym(void *dso_handle, const char *symbol) {
+  return ELFNixPlatformRuntimeState::get().dlsym(dso_handle, symbol);
+}
+
+//------------------------------------------------------------------------------
+//                             ELFNix Run Program
+//------------------------------------------------------------------------------
+
+ORC_RT_INTERFACE int64_t __orc_rt_elfnix_run_program(
+    const char *JITDylibName, const char *EntrySymbolName, int argc,
+    char *argv[]) {
+  using MainTy = int (*)(int, char *[]);
+
+  void *H = __orc_rt_elfnix_jit_dlopen(JITDylibName,
+                                       __orc_rt::elfnix::ORC_RT_RTLD_LAZY);
+  if (!H) {
+    __orc_rt_log_error(__orc_rt_elfnix_jit_dlerror());
+    return -1;
+  }
+
+  auto *Main =
+      reinterpret_cast<MainTy>(__orc_rt_elfnix_jit_dlsym(H, EntrySymbolName));
+
+  if (!Main) {
+    __orc_rt_log_error(__orc_rt_elfnix_jit_dlerror());
+    return -1;
+  }
+
+  int Result = Main(argc, argv);
+
+  if (__orc_rt_elfnix_jit_dlclose(H) == -1)
+    __orc_rt_log_error(__orc_rt_elfnix_jit_dlerror());
+
+  return Result;
+}