linux/kernel/kcsan/selftest.c

// SPDX-License-Identifier: GPL-2.0
/*
 * KCSAN short boot-time selftests.
 *
 * Copyright (C) 2019, Google LLC.
 */

#define pr_fmt(fmt) …

#include <linux/atomic.h>
#include <linux/bitops.h>
#include <linux/init.h>
#include <linux/kcsan-checks.h>
#include <linux/kernel.h>
#include <linux/printk.h>
#include <linux/random.h>
#include <linux/sched.h>
#include <linux/spinlock.h>
#include <linux/types.h>

#include "encoding.h"

#define ITERS_PER_TEST …

/*
 * Test watchpoint encode and decode: check that encoding some access's info,
 * and then subsequent decode preserves the access's info.
 */
static bool __init test_encode_decode(void)
{ … }

/* Test access matching function. */
static bool __init test_matching_access(void)
{ … }

/*
 * Correct memory barrier instrumentation is critical to avoiding false
 * positives: simple test to check at boot certain barriers are always properly
 * instrumented. See kcsan_test for a more complete test.
 */
static DEFINE_SPINLOCK(test_spinlock);
static bool __init test_barrier(void)
{ … }

static int __init kcsan_selftest(void)
{ … }
postcore_initcall(kcsan_selftest);