// SPDX-License-Identifier: GPL-2.0
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#include "tests.h"
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#include "machine.h"
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#include "thread.h"
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#include "debug.h"
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int test__thread_maps_share(struct test *test __maybe_unused, int subtest __maybe_unused)
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{
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struct machines machines;
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struct machine *machine;
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/* thread group */
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struct thread *leader;
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struct thread *t1, *t2, *t3;
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struct maps *maps;
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/* other process */
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struct thread *other, *other_leader;
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struct maps *other_maps;
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/*
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* This test create 2 processes abstractions (struct thread)
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* with several threads and checks they properly share and
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* maintain maps info (struct maps).
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*
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* thread group (pid: 0, tids: 0, 1, 2, 3)
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* other group (pid: 4, tids: 4, 5)
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*/
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machines__init(&machines);
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machine = &machines.host;
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/* create process with 4 threads */
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leader = machine__findnew_thread(machine, 0, 0);
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t1 = machine__findnew_thread(machine, 0, 1);
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t2 = machine__findnew_thread(machine, 0, 2);
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t3 = machine__findnew_thread(machine, 0, 3);
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/* and create 1 separated process, without thread leader */
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other = machine__findnew_thread(machine, 4, 5);
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TEST_ASSERT_VAL("failed to create threads",
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leader && t1 && t2 && t3 && other);
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maps = leader->maps;
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TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&maps->refcnt), 4);
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/* test the maps pointer is shared */
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TEST_ASSERT_VAL("maps don't match", maps == t1->maps);
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TEST_ASSERT_VAL("maps don't match", maps == t2->maps);
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TEST_ASSERT_VAL("maps don't match", maps == t3->maps);
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/*
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* Verify the other leader was created by previous call.
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* It should have shared maps with no change in
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* refcnt.
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*/
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other_leader = machine__find_thread(machine, 4, 4);
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TEST_ASSERT_VAL("failed to find other leader", other_leader);
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/*
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* Ok, now that all the rbtree related operations were done,
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* lets remove all of them from there so that we can do the
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* refcounting tests.
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*/
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machine__remove_thread(machine, leader);
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machine__remove_thread(machine, t1);
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machine__remove_thread(machine, t2);
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machine__remove_thread(machine, t3);
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machine__remove_thread(machine, other);
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machine__remove_thread(machine, other_leader);
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other_maps = other->maps;
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TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&other_maps->refcnt), 2);
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TEST_ASSERT_VAL("maps don't match", other_maps == other_leader->maps);
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/* release thread group */
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thread__put(leader);
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TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&maps->refcnt), 3);
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thread__put(t1);
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TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&maps->refcnt), 2);
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thread__put(t2);
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TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&maps->refcnt), 1);
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thread__put(t3);
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/* release other group */
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thread__put(other_leader);
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TEST_ASSERT_EQUAL("wrong refcnt", refcount_read(&other_maps->refcnt), 1);
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thread__put(other);
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machines__exit(&machines);
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return 0;
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}
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