--- xnu/xnu-12377.101.15/tests/workqueue_cooperative.c
+++ /dev/null
@@ -1,132 +0,0 @@
-#include <pthread.h>
-#include <stdbool.h>
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
-#include <sys/time.h>
-#include <mach/mach_time.h>
-#include <mach/thread_policy.h>
-#include <pthread.h>
-
-#include <pthread/tsd_private.h>
-#include <pthread/qos_private.h>
-
-#include <dispatch/dispatch.h>
-#include <dispatch/private.h>
-#include <darwintest.h>
-#include <pthread/workqueue_private.h>
-
-T_GLOBAL_META(
-	T_META_NAMESPACE("xnu.workq"),
-	T_META_RADAR_COMPONENT_NAME("xnu"),
-	T_META_RADAR_COMPONENT_VERSION("workq"),
-	T_META_RUN_CONCURRENTLY(true));
-
-static mach_timebase_info_data_t timebase_info;
-
-static uint64_t
-nanos_to_abs(uint64_t nanos)
-{
-	return nanos * timebase_info.denom / timebase_info.numer;
-}
-
-static void
-spin_for_duration(uint32_t seconds)
-{
-	kern_return_t kr = mach_timebase_info(&timebase_info);
-	assert(kr == KERN_SUCCESS);
-
-	uint64_t duration       = nanos_to_abs((uint64_t)seconds * NSEC_PER_SEC);
-	uint64_t current_time   = mach_absolute_time();
-	uint64_t timeout        = duration + current_time;
-
-	uint64_t spin_count = 0;
-
-	while (mach_absolute_time() < timeout) {
-		spin_count++;
-	}
-	return;
-}
-
-T_DECL(cooperative_workqueue_and_vfork, "rdar://74489806", T_META_TAG_VM_PREFERRED) {
-	dispatch_queue_t dq = dispatch_get_global_queue(QOS_CLASS_USER_INITIATED, 0);
-	T_ASSERT_NE(dq, NULL, "global_queue");
-
-	dispatch_async(dq, ^{
-		/* We are a workqueue non-overcommit thread, we should be getting a
-		 * quantum */
-		spin_for_duration(1);
-
-		pid_t child;
-		if ((child = vfork()) == 0) {
-		        usleep(100);
-		        spin_for_duration(1);
-		        _exit(0);
-		}
-
-		int status;
-		waitpid(child, &status, 0);
-		T_ASSERT_EQ(status, 0, "child status");
-
-		T_END;
-	});
-
-	dispatch_main();
-}
-
-T_DECL(adjust_quantum_nonovercommit_to_overcommit_switch, "rdar://75084197", T_META_TAG_VM_PREFERRED)
-{
-	dispatch_queue_t dq = dispatch_get_global_queue(QOS_CLASS_USER_INITIATED, 0);
-	T_ASSERT_NE(dq, NULL, "global_queue");
-
-	dispatch_async(dq, ^{
-		/* We are a workqueue non-overcommit thread, we should be getting a
-		 * quantum that we expire here */
-		spin_for_duration(1);
-
-		/* Should not panic when we switch to overcommit */
-		pthread_priority_t overcommit = (pthread_priority_t)_pthread_getspecific_direct(_PTHREAD_TSD_SLOT_PTHREAD_QOS_CLASS) |
-		_PTHREAD_PRIORITY_OVERCOMMIT_FLAG;
-		T_ASSERT_POSIX_ZERO(_pthread_set_properties_self(_PTHREAD_SET_SELF_QOS_FLAG, overcommit, 0), NULL);
-
-		T_END;
-	});
-
-	dispatch_main();
-}
-
-T_DECL(cooperative_to_overcommit_switch, "Switching from cooperative queue to another type should not panic", T_META_TAG_VM_PREFERRED)
-{
-	dispatch_queue_t cooperative_dq = dispatch_get_global_queue(QOS_CLASS_UTILITY, DISPATCH_QUEUE_COOPERATIVE);
-	T_ASSERT_NE(cooperative_dq, NULL, "global_queue");
-
-	dispatch_queue_attr_t attr = dispatch_queue_attr_make_with_qos_class(DISPATCH_QUEUE_SERIAL_WITH_AUTORELEASE_POOL, QOS_CLASS_USER_INITIATED, 0);
-	dispatch_queue_t dq = dispatch_queue_create("serial IN overcommit queue", attr);
-
-	dispatch_async(cooperative_dq, ^{
-		spin_for_duration(1);
-
-		dispatch_async_and_wait(dq, ^{
-			spin_for_duration(1);
-		});
-
-		dispatch_release(dq);
-		T_END;
-	});
-
-	dispatch_main();
-}
-
-T_DECL(maintenance_bg_coalesced, "BG and MT coalescing should work", T_META_TAG_VM_PREFERRED)
-{
-	dispatch_queue_t dq = dispatch_get_global_queue(QOS_CLASS_MAINTENANCE, DISPATCH_QUEUE_COOPERATIVE);
-	T_ASSERT_NE(dq, NULL, "global_queue");
-	dispatch_group_t dg = dispatch_group_create();
-
-	dispatch_group_async(dg, dq, ^{
-		spin_for_duration(1);
-	});
-
-	dispatch_group_wait(dg, DISPATCH_TIME_FOREVER);
-	dispatch_release(dg);
-}