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// SPDX-License-Identifier: BSD-2-Clause
/*
* Copyright (c) 2018, Linaro Limited
*/
/*
* Test lockdep with hypothetical thread and lock objects
*/
#include <assert.h>
#include <kernel/lockdep.h>
#include "core_self_tests.h"
static int self_test_lockdep1(void)
{
TEE_Result res = TEE_ERROR_GENERIC;
struct lockdep_node_head graph;
struct lockdep_lock_head thread1;
int count = 1;
DMSG("");
TAILQ_INIT(&thread1);
TAILQ_INIT(&graph);
/* Not locked, expect failure */
res = __lockdep_lock_release(&thread1, 1);
if (!res)
return count;
count++;
res = __lockdep_lock_acquire(&graph, &thread1, 1);
if (res)
return count;
count++;
res = __lockdep_lock_release(&thread1, 1);
if (res)
return count;
count++;
res = __lockdep_lock_acquire(&graph, &thread1, 1);
if (res)
return count;
count++;
res = __lockdep_lock_acquire(&graph, &thread1, 3);
if (res)
return count;
count++;
res = __lockdep_lock_acquire(&graph, &thread1, 2);
if (res)
return count;
count++;
res = __lockdep_lock_release(&thread1, 3);
if (res)
return count;
count++;
/* Already locked */
res = __lockdep_lock_acquire(&graph, &thread1, 2);
if (!res)
return count;
lockdep_graph_delete(&graph);
lockdep_queue_delete(&thread1);
return 0;
}
static int self_test_lockdep2(void)
{
TEE_Result res = TEE_ERROR_GENERIC;
struct lockdep_node_head graph;
struct lockdep_lock_head thread1;
struct lockdep_lock_head thread2;
struct lockdep_lock_head thread3;
int count = 1;
DMSG("");
TAILQ_INIT(&thread1);
TAILQ_INIT(&thread2);
TAILQ_INIT(&thread3);
TAILQ_INIT(&graph);
res = __lockdep_lock_acquire(&graph, &thread1, 1);
if (res)
return count;
count++;
res = __lockdep_lock_acquire(&graph, &thread2, 2);
if (res)
return count;
count++;
res = __lockdep_lock_acquire(&graph, &thread1, 2);
if (res)
return count;
count++;
res = __lockdep_lock_acquire(&graph, &thread3, 3);
if (res)
return count;
count++;
res = __lockdep_lock_acquire(&graph, &thread2, 3);
if (res)
return count;
count++;
/* Deadlock 1-2-3 */
res = __lockdep_lock_acquire(&graph, &thread3, 1);
if (!res)
return count;
lockdep_graph_delete(&graph);
lockdep_queue_delete(&thread1);
lockdep_queue_delete(&thread2);
lockdep_queue_delete(&thread3);
return 0;
}
TEE_Result core_lockdep_tests(uint32_t nParamTypes __unused,
TEE_Param pParams[TEE_NUM_PARAMS] __unused)
{
int count = 0;
count = self_test_lockdep1();
if (count)
goto out;
count = self_test_lockdep2();
if (count)
goto out;
out:
if (count) {
DMSG("count=%d", count);
return TEE_ERROR_GENERIC;
}
return TEE_SUCCESS;
}
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