1 #include <sys/sysctl.h>
2 #include <time.h>
3
4 #include <darwintest.h>
5 #include <darwintest_utils.h>
6
7 T_GLOBAL_META(
8 T_META_NAMESPACE("xnu.vm"),
9 T_META_RADAR_COMPONENT_NAME("xnu"),
10 T_META_RADAR_COMPONENT_VERSION("VM"));
11
12 static int64_t
run_sysctl_test(const char * t,int64_t value)13 run_sysctl_test(const char *t, int64_t value)
14 {
15 char name[1024];
16 int64_t result = 0;
17 size_t s = sizeof(value);
18 int rc;
19
20 snprintf(name, sizeof(name), "debug.test.%s", t);
21 rc = sysctlbyname(name, &result, &s, &value, s);
22 T_ASSERT_POSIX_SUCCESS(rc, "sysctlbyname(%s)", t);
23 return result;
24 }
25
26
27 static void *
gc_thread_func(__unused void * arg)28 gc_thread_func(__unused void *arg)
29 {
30 time_t start = time(NULL);
31
32 /*
33 * Keep kicking the test for 15 seconds to see if we can panic() the kernel
34 */
35 while (time(NULL) < start + 15) {
36 run_sysctl_test("zone_gc_replenish_test", 0);
37 }
38 return NULL;
39 }
40
41 static void *
alloc_thread_func(__unused void * arg)42 alloc_thread_func(__unused void *arg)
43 {
44 time_t start = time(NULL);
45
46 /*
47 * Keep kicking the test for 15 seconds to see if we can panic() the kernel
48 */
49 while (time(NULL) < start + 15) {
50 run_sysctl_test("zone_alloc_replenish_test", 0);
51 }
52 return NULL;
53 }
54
55 T_DECL(zone_gc_replenish_test,
56 "Test zone garbage collection, exhaustion and replenishment",
57 T_META_CHECK_LEAKS(false))
58 {
59 pthread_attr_t attr;
60 pthread_t gc_thread;
61 pthread_t alloc_thread;
62 int ret;
63
64 ret = pthread_attr_init(&attr);
65 T_QUIET; T_ASSERT_MACH_SUCCESS(ret, "pthread_attr_init");
66
67 ret = pthread_create(&gc_thread, &attr, gc_thread_func, NULL);
68 T_QUIET; T_ASSERT_POSIX_ZERO(ret, "gc pthread_create");
69
70 ret = pthread_create(&alloc_thread, &attr, alloc_thread_func, NULL);
71 T_QUIET; T_ASSERT_POSIX_ZERO(ret, "alloc pthread_create");
72
73 T_ASSERT_POSIX_ZERO(pthread_join(gc_thread, NULL), NULL);
74 T_ASSERT_POSIX_ZERO(pthread_join(alloc_thread, NULL), NULL);
75 T_PASS("Ran 15 seconds with no panic");
76 }
77