1#include "tests.h"
2#include "machine.h"
3#include "thread.h"
4#include "map.h"
5#include "debug.h"
6
7int test__thread_mg_share(void)
8{
9	struct machines machines;
10	struct machine *machine;
11
12	/* thread group */
13	struct thread *leader;
14	struct thread *t1, *t2, *t3;
15	struct map_groups *mg;
16
17	/* other process */
18	struct thread *other, *other_leader;
19	struct map_groups *other_mg;
20
21	/*
22	 * This test create 2 processes abstractions (struct thread)
23	 * with several threads and checks they properly share and
24	 * maintain map groups info (struct map_groups).
25	 *
26	 * thread group (pid: 0, tids: 0, 1, 2, 3)
27	 * other  group (pid: 4, tids: 4, 5)
28	*/
29
30	machines__init(&machines);
31	machine = &machines.host;
32
33	/* create process with 4 threads */
34	leader = machine__findnew_thread(machine, 0, 0);
35	t1     = machine__findnew_thread(machine, 0, 1);
36	t2     = machine__findnew_thread(machine, 0, 2);
37	t3     = machine__findnew_thread(machine, 0, 3);
38
39	/* and create 1 separated process, without thread leader */
40	other  = machine__findnew_thread(machine, 4, 5);
41
42	TEST_ASSERT_VAL("failed to create threads",
43			leader && t1 && t2 && t3 && other);
44
45	mg = leader->mg;
46	TEST_ASSERT_VAL("wrong refcnt", mg->refcnt == 4);
47
48	/* test the map groups pointer is shared */
49	TEST_ASSERT_VAL("map groups don't match", mg == t1->mg);
50	TEST_ASSERT_VAL("map groups don't match", mg == t2->mg);
51	TEST_ASSERT_VAL("map groups don't match", mg == t3->mg);
52
53	/*
54	 * Verify the other leader was created by previous call.
55	 * It should have shared map groups with no change in
56	 * refcnt.
57	 */
58	other_leader = machine__find_thread(machine, 4, 4);
59	TEST_ASSERT_VAL("failed to find other leader", other_leader);
60
61	other_mg = other->mg;
62	TEST_ASSERT_VAL("wrong refcnt", other_mg->refcnt == 2);
63
64	TEST_ASSERT_VAL("map groups don't match", other_mg == other_leader->mg);
65
66	/* release thread group */
67	thread__delete(leader);
68	TEST_ASSERT_VAL("wrong refcnt", mg->refcnt == 3);
69
70	thread__delete(t1);
71	TEST_ASSERT_VAL("wrong refcnt", mg->refcnt == 2);
72
73	thread__delete(t2);
74	TEST_ASSERT_VAL("wrong refcnt", mg->refcnt == 1);
75
76	thread__delete(t3);
77
78	/* release other group  */
79	thread__delete(other_leader);
80	TEST_ASSERT_VAL("wrong refcnt", other_mg->refcnt == 1);
81
82	thread__delete(other);
83
84	/*
85	 * Cannot call machine__delete_threads(machine) now,
86	 * because we've already released all the threads.
87	 */
88
89	machines__exit(&machines);
90	return 0;
91}
92