[SYCL][NFC] Reinitialize global handler before using in SYCL unittests (#20733)

Author: uditagarwal97

sycl/source/detail/global_handler.hpp

@@ -92,6 +92,11 @@ class GlobalHandler {
   // For testing purposes only
   void attachScheduler(Scheduler *Scheduler);
 
+  // Used in SYCL unit tests to reset the GlobalHandler instance.
+  static void resetGlobalHandler() {
+    RTGlobalObjHandler = new GlobalHandler();
+  };
+
 private:
   // Constructor and destructor are declared out-of-line to allow incomplete
   // types as template arguments to unique_ptr.

sycl/unittests/helpers/MockDeviceImage.hpp

@@ -379,6 +379,10 @@ template <size_t __NumberOfImages> class MockDeviceImageArray {
   static constexpr size_t NumberOfImages = __NumberOfImages;
 
   MockDeviceImageArray(MockDeviceImage *Imgs) {
+
+    if (!GlobalHandler::isInstanceAlive())
+      GlobalHandler::resetGlobalHandler();
+
     for (size_t Idx = 0; Idx < NumberOfImages; ++Idx)
       MNativeImages[Idx] = Imgs[Idx].convertToNativeType();
 

sycl/unittests/pipes/host_pipe_registration.cpp

@@ -10,6 +10,7 @@
 #include <sycl/sycl.hpp>
 
 #include <detail/device_binary_image.hpp>
+#include <detail/global_handler.hpp>
 #include <detail/host_pipe_map_entry.hpp>
 #include <gtest/gtest.h>
 #include <helpers/MockDeviceImage.hpp>
@@ -32,6 +33,9 @@ using Pipe = sycl::ext::intel::experimental::pipe<PipeID, int, 10,
 static sycl::unittest::MockDeviceImage generateDefaultImage() {
   using namespace sycl::unittest;
 
+  if (!GlobalHandler::isInstanceAlive())
+    GlobalHandler::resetGlobalHandler();
+
   sycl::detail::host_pipe_map::add(Pipe::get_host_ptr(),
                                    "test_host_pipe_unique_id");