1 | // SPDX-License-Identifier: GPL-2.0 |
2 | #include "tests.h" |
3 | #include "machine.h" |
4 | #include "thread.h" |
5 | #include "debug.h" |
6 | |
7 | static int test__thread_maps_share(struct test_suite *test __maybe_unused, int subtest __maybe_unused) |
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 maps *maps; |
16 | |
17 | /* other process */ |
18 | struct thread *other, *other_leader; |
19 | struct maps *other_maps; |
20 | |
21 | /* |
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). |
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 | maps = thread__maps(leader); |
46 | TEST_ASSERT_EQUAL("wrong refcnt" , refcount_read(maps__refcnt(maps)), 4); |
47 | |
48 | /* test the maps pointer is shared */ |
49 | TEST_ASSERT_VAL("maps don't match" , maps__equal(maps, thread__maps(t1))); |
50 | TEST_ASSERT_VAL("maps don't match" , maps__equal(maps, thread__maps(t2))); |
51 | TEST_ASSERT_VAL("maps don't match" , maps__equal(maps, thread__maps(t3))); |
52 | |
53 | /* |
54 | * Verify the other leader was created by previous call. |
55 | * It should have shared maps 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 | /* |
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 |
64 | * refcounting tests. |
65 | */ |
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); |
72 | |
73 | other_maps = thread__maps(other); |
74 | TEST_ASSERT_EQUAL("wrong refcnt" , refcount_read(maps__refcnt(other_maps)), 2); |
75 | |
76 | TEST_ASSERT_VAL("maps don't match" , maps__equal(other_maps, thread__maps(other_leader))); |
77 | |
78 | /* release thread group */ |
79 | thread__put(t3); |
80 | TEST_ASSERT_EQUAL("wrong refcnt" , refcount_read(maps__refcnt(maps)), 3); |
81 | |
82 | thread__put(t2); |
83 | TEST_ASSERT_EQUAL("wrong refcnt" , refcount_read(maps__refcnt(maps)), 2); |
84 | |
85 | thread__put(t1); |
86 | TEST_ASSERT_EQUAL("wrong refcnt" , refcount_read(maps__refcnt(maps)), 1); |
87 | |
88 | thread__put(leader); |
89 | |
90 | /* release other group */ |
91 | thread__put(other_leader); |
92 | TEST_ASSERT_EQUAL("wrong refcnt" , refcount_read(maps__refcnt(other_maps)), 1); |
93 | |
94 | thread__put(other); |
95 | |
96 | machines__exit(&machines); |
97 | return 0; |
98 | } |
99 | |
100 | DEFINE_SUITE("Share thread maps" , thread_maps_share); |
101 | |