--- libmalloc/libmalloc-374.40.6/tests/memory_pressure.c
+++ /dev/null
@@ -1,171 +0,0 @@
-#include <darwintest.h>
-#include <dispatch/dispatch.h>
-#include <malloc/malloc.h>
-#include <os/lock.h>
-#include <stdlib.h>
-#include <sys/queue.h>
-
-#if TARGET_OS_WATCH
-#define TEST_TIMEOUT 1200
-#endif // TARGET_OS_WATCH
-
-TAILQ_HEAD(thead, entry);
-struct entry {
-	TAILQ_ENTRY(entry) next;
-};
-
-static void
-stress(size_t sz, size_t cnt)
-{
-	struct thead head = TAILQ_HEAD_INITIALIZER(head);
-	TAILQ_INIT(&head);
-
-	for (int t=0; t<100; t++) {
-		for (int i=0; i<cnt; i++) {
-			struct entry *p = calloc(1, sz);
-			TAILQ_INSERT_TAIL(&head, p, next);
-		}
-		int i=0;
-		struct entry *p;
-		while ((p = TAILQ_FIRST(&head)) != NULL) {
-			TAILQ_REMOVE(&head, p, next);
-			free((void *)p);
-			i++;
-		}
-	}
-}
-
-T_DECL(tiny_mem_pressure, "tiny memory pressure",
-#if TARGET_OS_WATCH
-		T_META_TIMEOUT(TEST_TIMEOUT),
-#endif // TARGET_OS_WATCH
-		T_META_ENVVAR("MallocDebugReport=stderr"),
-		T_META_ENVVAR("MallocScribble=1"),
-		T_META_ENVVAR("MallocSpaceEfficient=1"),
-		T_META_ENVVAR("MallocMaxMagazines=1"),
-		T_META_CHECK_LEAKS(false))
-{
-	dispatch_queue_t q = dispatch_queue_create("pressure queue", 0); // serial
-	dispatch_async(q, ^{
-		while (1) {
-			malloc_zone_pressure_relief(0, 0);
-			usleep(100000);
-		}
-	});
-	stress(128, 50000);
-	T_PASS("didn't crash");
-}
-
-T_DECL(small_mem_pressure, "small memory pressure thread",
-#if TARGET_OS_WATCH
-		T_META_TIMEOUT(TEST_TIMEOUT),
-#endif // TARGET_OS_WATCH
-		T_META_ENVVAR("MallocDebugReport=stderr"),
-		T_META_ENVVAR("MallocScribble=1"),
-		T_META_ENVVAR("MallocSpaceEfficient=1"),
-		T_META_ENVVAR("MallocMaxMagazines=1"),
-		T_META_CHECK_LEAKS(false))
-{
-	dispatch_queue_t q = dispatch_queue_create("pressure queue", 0); // serial
-	dispatch_async(q, ^{
-		while (1) {
-			malloc_zone_pressure_relief(0, 0);
-			usleep(10000);
-		}
-	});
-	stress(512, 20000);
-	T_PASS("didn't crash");
-}
-
-T_DECL(medium_mem_pressure, "medium memory pressure thread",
-#if TARGET_OS_WATCH
-		T_META_TIMEOUT(TEST_TIMEOUT),
-#endif // TARGET_OS_WATCH
-		T_META_ENVVAR("MallocDebugReport=stderr"),
-		T_META_ENVVAR("MallocScribble=1"),
-		T_META_ENVVAR("MallocSpaceEfficient=1"),
-		T_META_ENVVAR("MallocMaxMagazines=1"),
-		T_META_CHECK_LEAKS(false))
-{
-	dispatch_queue_t q = dispatch_queue_create("pressure queue", 0); // serial
-	dispatch_async(q, ^{
-		while (1) {
-			malloc_zone_pressure_relief(0, 0);
-			usleep(100000);
-		}
-	});
-	stress(64*1024, 1000);
-	T_PASS("didn't crash");
-}
-
-T_DECL(tiny_mem_pressure_multi, "test memory pressure in tiny on threads",
-#if TARGET_OS_WATCH
-		T_META_TIMEOUT(TEST_TIMEOUT),
-#endif // TARGET_OS_WATCH
-		T_META_CHECK_LEAKS(false)) {
-	dispatch_group_t g = dispatch_group_create();
-	for (int i=0; i<16; i++) {
-		dispatch_group_async(g, dispatch_get_global_queue(0, 0), ^{
-			stress(128, 100000);
-		});
-	}
-	dispatch_group_notify(g, dispatch_get_global_queue(0, 0), ^{
-		T_PASS("didn't crash!");
-		T_END;
-	});
-	dispatch_release(g);
-
-	while (1) {
-		T_LOG("malloc_zone_pressure_relief");
-		malloc_zone_pressure_relief(malloc_default_zone(), 0);
-		sleep(1);
-	}
-}
-
-T_DECL(small_mem_pressure_multi, "test memory pressure in small on threads",
-#if TARGET_OS_WATCH
-		T_META_TIMEOUT(TEST_TIMEOUT),
-#endif // TARGET_OS_WATCH
-		T_META_CHECK_LEAKS(false)) {
-	dispatch_group_t g = dispatch_group_create();
-	for (int i=0; i<3; i++) {
-		dispatch_group_async(g, dispatch_get_global_queue(0, 0), ^{
-			stress(1024, 100000);
-		});
-	}
-	dispatch_group_notify(g, dispatch_get_global_queue(0, 0), ^{
-		T_PASS("didn't crash!");
-		T_END;
-	});
-	dispatch_release(g);
-
-	while (1) {
-		T_LOG("malloc_zone_pressure_relief");
-		malloc_zone_pressure_relief(malloc_default_zone(), 0);
-		sleep(1);
-	}
-}
-
-T_DECL(medium_mem_pressure_multi, "test memory pressure in medium on threads",
-#if TARGET_OS_WATCH
-		T_META_TIMEOUT(TEST_TIMEOUT),
-#endif // TARGET_OS_WATCH
-		T_META_CHECK_LEAKS(false)) {
-	dispatch_group_t g = dispatch_group_create();
-	for (int i=0; i<30; i++) {
-		dispatch_group_async(g, dispatch_get_global_queue(0, 0), ^{
-			stress(64*1024, 1000);
-		});
-	}
-	dispatch_group_notify(g, dispatch_get_global_queue(0, 0), ^{
-		T_PASS("didn't crash!");
-		T_END;
-	});
-	dispatch_release(g);
-
-	while (1) {
-		T_LOG("malloc_zone_pressure_relief");
-		malloc_zone_pressure_relief(malloc_default_zone(), 0);
-		sleep(1);
-	}
-}