1 // SPDX-License-Identifier: GPL-2.0
7 static int test__thread_maps_share(struct test_suite *test __maybe_unused, int subtest __maybe_unused)
9 struct machines machines;
10 struct machine *machine;
13 struct thread *leader;
14 struct thread *t1, *t2, *t3;
18 struct thread *other, *other_leader;
19 struct maps *other_maps;
22 * This test create 2 processes abstractions (struct thread)
23 * with several threads and checks they properly share and
24 * maintain maps info (struct maps).
26 * thread group (pid: 0, tids: 0, 1, 2, 3)
27 * other group (pid: 4, tids: 4, 5)
30 machines__init(&machines);
31 machine = &machines.host;
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);
39 /* and create 1 separated process, without thread leader */
40 other = machine__findnew_thread(machine, 4, 5);
42 TEST_ASSERT_VAL("failed to create threads",
43 leader && t1 && t2 && t3 && other);
46 TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(maps__refcnt(maps)), 4);
48 /* test the maps pointer is shared */
49 TEST_ASSERT_VAL("maps don't match", maps == t1->maps);
50 TEST_ASSERT_VAL("maps don't match", maps == t2->maps);
51 TEST_ASSERT_VAL("maps don't match", maps == t3->maps);
54 * Verify the other leader was created by previous call.
55 * It should have shared maps with no change in
58 other_leader = machine__find_thread(machine, 4, 4);
59 TEST_ASSERT_VAL("failed to find other leader", other_leader);
62 * Ok, now that all the rbtree related operations were done,
63 * lets remove all of them from there so that we can do the
66 machine__remove_thread(machine, leader);
67 machine__remove_thread(machine, t1);
68 machine__remove_thread(machine, t2);
69 machine__remove_thread(machine, t3);
70 machine__remove_thread(machine, other);
71 machine__remove_thread(machine, other_leader);
73 other_maps = other->maps;
74 TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(maps__refcnt(other_maps)), 2);
76 TEST_ASSERT_VAL("maps don't match", other_maps == other_leader->maps);
78 /* release thread group */
80 TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(maps__refcnt(maps)), 3);
83 TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(maps__refcnt(maps)), 2);
86 TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(maps__refcnt(maps)), 1);
90 /* release other group */
91 thread__put(other_leader);
92 TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(maps__refcnt(other_maps)), 1);
96 machines__exit(&machines);
100 DEFINE_SUITE("Share thread maps", thread_maps_share);