| // SPDX-License-Identifier: GPL-2.0 |
| #include "tests.h" |
| #include "machine.h" |
| #include "thread.h" |
| #include "debug.h" |
| |
| int test__thread_mg_share(struct test *test __maybe_unused, int subtest __maybe_unused) |
| { |
| struct machines machines; |
| struct machine *machine; |
| |
| /* thread group */ |
| struct thread *leader; |
| struct thread *t1, *t2, *t3; |
| struct map_groups *mg; |
| |
| /* other process */ |
| struct thread *other, *other_leader; |
| struct map_groups *other_mg; |
| |
| /* |
| * This test create 2 processes abstractions (struct thread) |
| * with several threads and checks they properly share and |
| * maintain map groups info (struct map_groups). |
| * |
| * thread group (pid: 0, tids: 0, 1, 2, 3) |
| * other group (pid: 4, tids: 4, 5) |
| */ |
| |
| machines__init(&machines); |
| machine = &machines.host; |
| |
| /* create process with 4 threads */ |
| leader = machine__findnew_thread(machine, 0, 0); |
| t1 = machine__findnew_thread(machine, 0, 1); |
| t2 = machine__findnew_thread(machine, 0, 2); |
| t3 = machine__findnew_thread(machine, 0, 3); |
| |
| /* and create 1 separated process, without thread leader */ |
| other = machine__findnew_thread(machine, 4, 5); |
| |
| TEST_ASSERT_VAL("failed to create threads", |
| leader && t1 && t2 && t3 && other); |
| |
| mg = leader->mg; |
| TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&mg->refcnt), 4); |
| |
| /* test the map groups pointer is shared */ |
| TEST_ASSERT_VAL("map groups don't match", mg == t1->mg); |
| TEST_ASSERT_VAL("map groups don't match", mg == t2->mg); |
| TEST_ASSERT_VAL("map groups don't match", mg == t3->mg); |
| |
| /* |
| * Verify the other leader was created by previous call. |
| * It should have shared map groups with no change in |
| * refcnt. |
| */ |
| other_leader = machine__find_thread(machine, 4, 4); |
| TEST_ASSERT_VAL("failed to find other leader", other_leader); |
| |
| /* |
| * Ok, now that all the rbtree related operations were done, |
| * lets remove all of them from there so that we can do the |
| * refcounting tests. |
| */ |
| machine__remove_thread(machine, leader); |
| machine__remove_thread(machine, t1); |
| machine__remove_thread(machine, t2); |
| machine__remove_thread(machine, t3); |
| machine__remove_thread(machine, other); |
| machine__remove_thread(machine, other_leader); |
| |
| other_mg = other->mg; |
| TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&other_mg->refcnt), 2); |
| |
| TEST_ASSERT_VAL("map groups don't match", other_mg == other_leader->mg); |
| |
| /* release thread group */ |
| thread__put(leader); |
| TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&mg->refcnt), 3); |
| |
| thread__put(t1); |
| TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&mg->refcnt), 2); |
| |
| thread__put(t2); |
| TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&mg->refcnt), 1); |
| |
| thread__put(t3); |
| |
| /* release other group */ |
| thread__put(other_leader); |
| TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&other_mg->refcnt), 1); |
| |
| thread__put(other); |
| |
| machines__exit(&machines); |
| return 0; |
| } |