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// SPDX-License-Identifier: GPL-2.0
#include <linux/kernel.h>
#include <linux/gfp.h>
#include <linux/slab.h>
#include <linux/radix-tree.h>
#include <linux/rcupdate.h>
#include <stdlib.h>
#include <pthread.h>
#include <stdio.h>
#include <assert.h>
#include "regression.h"
static pthread_barrier_t worker_barrier;
static int obj0, obj1;
static RADIX_TREE(mt_tree, GFP_KERNEL);
static void *reader_fn(void *arg)
{
int i;
void *entry;
rcu_register_thread();
pthread_barrier_wait(&worker_barrier);
for (i = 0; i < 1000000; i++) {
rcu_read_lock();
entry = radix_tree_lookup(&mt_tree, 0);
rcu_read_unlock();
if (entry != &obj0) {
printf("iteration %d bad entry = %p\n", i, entry);
abort();
}
}
rcu_unregister_thread();
return NULL;
}
static void *writer_fn(void *arg)
{
int i;
rcu_register_thread();
pthread_barrier_wait(&worker_barrier);
for (i = 0; i < 1000000; i++) {
radix_tree_insert(&mt_tree, 1, &obj1);
radix_tree_delete(&mt_tree, 1);
}
rcu_unregister_thread();
return NULL;
}
void regression4_test(void)
{
pthread_t reader, writer;
printv(1, "regression test 4 starting\n");
radix_tree_insert(&mt_tree, 0, &obj0);
pthread_barrier_init(&worker_barrier, NULL, 2);
if (pthread_create(&reader, NULL, reader_fn, NULL) ||
pthread_create(&writer, NULL, writer_fn, NULL)) {
perror("pthread_create");
exit(1);
}
if (pthread_join(reader, NULL) || pthread_join(writer, NULL)) {
perror("pthread_join");
exit(1);
}
printv(1, "regression test 4 passed\n");
}
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