// SPDX-License-Identifier: GPL-2.0
#include "tests.h"
#include "machine.h"
#include "thread.h"
#include "debug.h"
static int test__thread_maps_share(struct test_suite *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 = thread__maps(leader);
TEST_ASSERT_EQUAL("wrong refcnt" , refcount_read(maps__refcnt(maps)), 4 );
/* test the maps pointer is shared */
TEST_ASSERT_VAL("maps don't match" , maps__equal(maps, thread__maps(t1)));
TEST_ASSERT_VAL("maps don't match" , maps__equal(maps, thread__maps(t2)));
TEST_ASSERT_VAL("maps don't match" , maps__equal(maps, thread__maps(t3)));
/*
* 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 = thread__maps(other);
TEST_ASSERT_EQUAL("wrong refcnt" , refcount_read(maps__refcnt(other_maps)), 2 );
TEST_ASSERT_VAL("maps don't match" , maps__equal(other_maps, thread__maps(other_leader)));
/* release thread group */
thread__put(t3);
TEST_ASSERT_EQUAL("wrong refcnt" , refcount_read(maps__refcnt(maps)), 3 );
thread__put(t2);
TEST_ASSERT_EQUAL("wrong refcnt" , refcount_read(maps__refcnt(maps)), 2 );
thread__put(t1);
TEST_ASSERT_EQUAL("wrong refcnt" , refcount_read(maps__refcnt(maps)), 1 );
thread__put(leader);
/* release other group */
thread__put(other_leader);
TEST_ASSERT_EQUAL("wrong refcnt" , refcount_read(maps__refcnt(other_maps)), 1 );
thread__put(other);
machines__exit(&machines);
return 0 ;
}
DEFINE_SUITE("Share thread maps" , thread_maps_share);
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