1 #include "tests.h"
2 #include "machine.h"
3 #include "thread.h"
4 #include "map.h"
5 #include "debug.h"
6
test__thread_mg_share(void)7 int 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