1// SPDX-License-Identifier: GPL-2.0
  2#include "tests.h"
  3#include "machine.h"
  4#include "thread.h"
  5#include "debug.h"
  6
  7static 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", RC_CHK_EQUAL(maps, thread__maps(t1)));
 50	TEST_ASSERT_VAL("maps don't match", RC_CHK_EQUAL(maps, thread__maps(t2)));
 51	TEST_ASSERT_VAL("maps don't match", RC_CHK_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", RC_CHK_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
100DEFINE_SUITE("Share thread maps", thread_maps_share);