Function runStaticInitializers

c/parallel/src/hostjit/loader.cpp:19–42

Run C++ static constructors in a DLL loaded with /NOENTRY /NODEFAULTLIB. The compiler places CUDA fatbin registration in the .CRT$XCU section. Without CRT startup, these never run, so we walk the merged .CRT section in the PE and call each non-null function pointer.

// Without CRT startup, these never run, so we walk the merged .CRT section
// in the PE and call each non-null function pointer.
void runStaticInitializers(HMODULE module)
{
  auto base = reinterpret_cast<const unsigned char*>(module);
  auto dos  = reinterpret_cast<const IMAGE_DOS_HEADER*>(base);
  auto nt   = reinterpret_cast<const IMAGE_NT_HEADERS*>(base + dos->e_lfanew);
  auto sec  = IMAGE_FIRST_SECTION(nt);

  for (WORD i = 0; i < nt->FileHeader.NumberOfSections; ++i, ++sec)
  {
    if (memcmp(sec->Name, ".CRT", 4) == 0)
    {
      using InitFunc = void(__cdecl*)();
      auto funcs     = reinterpret_cast<InitFunc*>(const_cast<unsigned char*>(base) + sec->VirtualAddress);
      size_t count   = sec->SizeOfRawData / sizeof(InitFunc);
      for (size_t j = 0; j < count; ++j)
      {
        if (funcs[j])
        {
          funcs[j]();
        }
      }
    }
  }
}

std::string getWindowsError()
{