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98 lines
2.8 KiB
98 lines
2.8 KiB
// 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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