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