[SYCL] Fixed assert on windows with GetModuleFileNameA failed (#1809)

This patch fixes a problem on Windows, when any unit test with invocation kernel run:
`Assertion failed: Ret > 0 && "GetModuleFileNameA failed", file D:\sycl_workspace\llvm\sycl\source\detail\os_util.cpp, line 208`

GetModuleFileNameA() requires 0 as the first parameter for current executable module, but it is -1 (OSUtil::ExeModuleHandle), see return value in getOSModuleHandle().

About GetModuleFileNameA() from Windows API doc :
> A handle to the loaded module whose path is being requested. If this parameter is NULL, GetModuleFileName retrieves the path of the executable file of the current process.

Signed-off-by: Alexander Flegontov <[email protected]>

Author: alexanderfle

sycl/source/detail/os_util.cpp

@@ -200,10 +200,10 @@ std::string OSUtil::getCurrentDSODir() {
   char Path[MAX_PATH];
   Path[0] = '\0';
   Path[sizeof(Path) - 1] = '\0';
+  auto Handle = getOSModuleHandle(&getCurrentDSODir);
   DWORD Ret = GetModuleFileNameA(
-    reinterpret_cast<HMODULE>(getOSModuleHandle(&getCurrentDSODir)),
-    reinterpret_cast<LPSTR>(&Path),
-    sizeof(Path));
+      reinterpret_cast<HMODULE>(OSUtil::ExeModuleHandle == Handle ? 0 : Handle),
+      reinterpret_cast<LPSTR>(&Path), sizeof(Path));
   assert(Ret < sizeof(Path) && "Path is longer than PATH_MAX?");
   assert(Ret > 0 && "GetModuleFileNameA failed");
   (void)Ret;