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// SPDX-License-Identifier: GPL-2.0
#include "tests.h"
#include "machine.h"
#include "thread.h"
#include "debug.h"
int test__thread_maps_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 maps *maps;
/* other process */
struct thread *other, *other_leader;
struct maps *other_maps;
/*
* This test create 2 processes abstractions (struct thread)
* with several threads and checks they properly share and
* maintain maps info (struct maps).
*
* 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);
maps = leader->maps;
TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&maps->refcnt), 4);
/* test the maps pointer is shared */
TEST_ASSERT_VAL("maps don't match", maps == t1->maps);
TEST_ASSERT_VAL("maps don't match", maps == t2->maps);
TEST_ASSERT_VAL("maps don't match", maps == t3->maps);
/*
* Verify the other leader was created by previous call.
* It should have shared maps 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_maps = other->maps;
TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&other_maps->refcnt), 2);
TEST_ASSERT_VAL("maps don't match", other_maps == other_leader->maps);
/* release thread group */
thread__put(leader);
TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&maps->refcnt), 3);
thread__put(t1);
TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&maps->refcnt), 2);
thread__put(t2);
TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&maps->refcnt), 1);
thread__put(t3);
/* release other group */
thread__put(other_leader);
TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&other_maps->refcnt), 1);
thread__put(other);
machines__exit(&machines);
return 0;
}
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