Orange Pi5 kernel

// 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;
}