460 lines
12 KiB
C
460 lines
12 KiB
C
// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
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/*
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* Tests for libbpf's hashmap.
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*
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* Copyright (c) 2019 Facebook
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*/
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#include "test_progs.h"
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#include "bpf/hashmap.h"
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#include <stddef.h>
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static int duration = 0;
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static size_t hash_fn(long k, void *ctx)
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{
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return k;
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}
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static bool equal_fn(long a, long b, void *ctx)
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{
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return a == b;
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}
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static inline size_t next_pow_2(size_t n)
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{
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size_t r = 1;
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while (r < n)
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r <<= 1;
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return r;
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}
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static inline size_t exp_cap(size_t sz)
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{
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size_t r = next_pow_2(sz);
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if (sz * 4 / 3 > r)
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r <<= 1;
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return r;
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}
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#define ELEM_CNT 62
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static void test_hashmap_generic(void)
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{
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struct hashmap_entry *entry, *tmp;
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int err, bkt, found_cnt, i;
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long long found_msk;
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struct hashmap *map;
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map = hashmap__new(hash_fn, equal_fn, NULL);
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if (!ASSERT_OK_PTR(map, "hashmap__new"))
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return;
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for (i = 0; i < ELEM_CNT; i++) {
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long oldk, k = i;
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long oldv, v = 1024 + i;
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err = hashmap__update(map, k, v, &oldk, &oldv);
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if (CHECK(err != -ENOENT, "hashmap__update",
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"unexpected result: %d\n", err))
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goto cleanup;
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if (i % 2) {
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err = hashmap__add(map, k, v);
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} else {
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err = hashmap__set(map, k, v, &oldk, &oldv);
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if (CHECK(oldk != 0 || oldv != 0, "check_kv",
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"unexpected k/v: %ld=%ld\n", oldk, oldv))
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goto cleanup;
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}
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if (CHECK(err, "elem_add", "failed to add k/v %ld = %ld: %d\n", k, v, err))
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goto cleanup;
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if (CHECK(!hashmap__find(map, k, &oldv), "elem_find",
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"failed to find key %ld\n", k))
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goto cleanup;
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if (CHECK(oldv != v, "elem_val", "found value is wrong: %ld\n", oldv))
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goto cleanup;
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}
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if (CHECK(hashmap__size(map) != ELEM_CNT, "hashmap__size",
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"invalid map size: %zu\n", hashmap__size(map)))
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goto cleanup;
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if (CHECK(hashmap__capacity(map) != exp_cap(hashmap__size(map)),
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"hashmap_cap",
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"unexpected map capacity: %zu\n", hashmap__capacity(map)))
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goto cleanup;
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found_msk = 0;
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hashmap__for_each_entry(map, entry, bkt) {
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long k = entry->key;
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long v = entry->value;
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found_msk |= 1ULL << k;
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if (CHECK(v - k != 1024, "check_kv",
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"invalid k/v pair: %ld = %ld\n", k, v))
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goto cleanup;
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}
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if (CHECK(found_msk != (1ULL << ELEM_CNT) - 1, "elem_cnt",
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"not all keys iterated: %llx\n", found_msk))
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goto cleanup;
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for (i = 0; i < ELEM_CNT; i++) {
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long oldk, k = i;
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long oldv, v = 256 + i;
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err = hashmap__add(map, k, v);
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if (CHECK(err != -EEXIST, "hashmap__add",
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"unexpected add result: %d\n", err))
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goto cleanup;
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if (i % 2)
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err = hashmap__update(map, k, v, &oldk, &oldv);
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else
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err = hashmap__set(map, k, v, &oldk, &oldv);
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if (CHECK(err, "elem_upd",
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"failed to update k/v %ld = %ld: %d\n",
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k, v, err))
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goto cleanup;
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if (CHECK(!hashmap__find(map, k, &oldv), "elem_find",
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"failed to find key %ld\n", k))
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goto cleanup;
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if (CHECK(oldv != v, "elem_val",
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"found value is wrong: %ld\n", oldv))
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goto cleanup;
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}
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if (CHECK(hashmap__size(map) != ELEM_CNT, "hashmap__size",
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"invalid updated map size: %zu\n", hashmap__size(map)))
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goto cleanup;
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if (CHECK(hashmap__capacity(map) != exp_cap(hashmap__size(map)),
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"hashmap__capacity",
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"unexpected map capacity: %zu\n", hashmap__capacity(map)))
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goto cleanup;
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found_msk = 0;
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hashmap__for_each_entry_safe(map, entry, tmp, bkt) {
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long k = entry->key;
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long v = entry->value;
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found_msk |= 1ULL << k;
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if (CHECK(v - k != 256, "elem_check",
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"invalid updated k/v pair: %ld = %ld\n", k, v))
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goto cleanup;
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}
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if (CHECK(found_msk != (1ULL << ELEM_CNT) - 1, "elem_cnt",
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"not all keys iterated after update: %llx\n", found_msk))
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goto cleanup;
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found_cnt = 0;
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hashmap__for_each_key_entry(map, entry, 0) {
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found_cnt++;
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}
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if (CHECK(!found_cnt, "found_cnt",
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"didn't find any entries for key 0\n"))
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goto cleanup;
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found_msk = 0;
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found_cnt = 0;
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hashmap__for_each_key_entry_safe(map, entry, tmp, 0) {
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long oldk, k;
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long oldv, v;
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k = entry->key;
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v = entry->value;
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found_cnt++;
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found_msk |= 1ULL << k;
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if (CHECK(!hashmap__delete(map, k, &oldk, &oldv), "elem_del",
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"failed to delete k/v %ld = %ld\n", k, v))
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goto cleanup;
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if (CHECK(oldk != k || oldv != v, "check_old",
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"invalid deleted k/v: expected %ld = %ld, got %ld = %ld\n",
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k, v, oldk, oldv))
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goto cleanup;
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if (CHECK(hashmap__delete(map, k, &oldk, &oldv), "elem_del",
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"unexpectedly deleted k/v %ld = %ld\n", oldk, oldv))
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goto cleanup;
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}
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if (CHECK(!found_cnt || !found_msk, "found_entries",
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"didn't delete any key entries\n"))
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goto cleanup;
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if (CHECK(hashmap__size(map) != ELEM_CNT - found_cnt, "elem_cnt",
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"invalid updated map size (already deleted: %d): %zu\n",
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found_cnt, hashmap__size(map)))
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goto cleanup;
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if (CHECK(hashmap__capacity(map) != exp_cap(hashmap__size(map)),
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"hashmap__capacity",
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"unexpected map capacity: %zu\n", hashmap__capacity(map)))
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goto cleanup;
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hashmap__for_each_entry_safe(map, entry, tmp, bkt) {
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long oldk, k;
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long oldv, v;
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k = entry->key;
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v = entry->value;
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found_cnt++;
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found_msk |= 1ULL << k;
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if (CHECK(!hashmap__delete(map, k, &oldk, &oldv), "elem_del",
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"failed to delete k/v %ld = %ld\n", k, v))
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goto cleanup;
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if (CHECK(oldk != k || oldv != v, "elem_check",
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"invalid old k/v: expect %ld = %ld, got %ld = %ld\n",
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k, v, oldk, oldv))
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goto cleanup;
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if (CHECK(hashmap__delete(map, k, &oldk, &oldv), "elem_del",
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"unexpectedly deleted k/v %ld = %ld\n", k, v))
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goto cleanup;
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}
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if (CHECK(found_cnt != ELEM_CNT || found_msk != (1ULL << ELEM_CNT) - 1,
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"found_cnt",
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"not all keys were deleted: found_cnt:%d, found_msk:%llx\n",
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found_cnt, found_msk))
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goto cleanup;
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if (CHECK(hashmap__size(map) != 0, "hashmap__size",
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"invalid updated map size (already deleted: %d): %zu\n",
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found_cnt, hashmap__size(map)))
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goto cleanup;
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found_cnt = 0;
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hashmap__for_each_entry(map, entry, bkt) {
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CHECK(false, "elem_exists",
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"unexpected map entries left: %ld = %ld\n",
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entry->key, entry->value);
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goto cleanup;
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}
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hashmap__clear(map);
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hashmap__for_each_entry(map, entry, bkt) {
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CHECK(false, "elem_exists",
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"unexpected map entries left: %ld = %ld\n",
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entry->key, entry->value);
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goto cleanup;
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}
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cleanup:
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hashmap__free(map);
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}
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static size_t str_hash_fn(long a, void *ctx)
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{
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return str_hash((char *)a);
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}
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static bool str_equal_fn(long a, long b, void *ctx)
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{
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return strcmp((char *)a, (char *)b) == 0;
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}
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/* Verify that hashmap interface works with pointer keys and values */
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static void test_hashmap_ptr_iface(void)
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{
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const char *key, *value, *old_key, *old_value;
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struct hashmap_entry *cur;
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struct hashmap *map;
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int err, i, bkt;
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map = hashmap__new(str_hash_fn, str_equal_fn, NULL);
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if (CHECK(!map, "hashmap__new", "can't allocate hashmap\n"))
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goto cleanup;
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#define CHECK_STR(fn, var, expected) \
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CHECK(strcmp(var, (expected)), (fn), \
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"wrong value of " #var ": '%s' instead of '%s'\n", var, (expected))
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err = hashmap__insert(map, "a", "apricot", HASHMAP_ADD, NULL, NULL);
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if (CHECK(err, "hashmap__insert", "unexpected error: %d\n", err))
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goto cleanup;
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err = hashmap__insert(map, "a", "apple", HASHMAP_SET, &old_key, &old_value);
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if (CHECK(err, "hashmap__insert", "unexpected error: %d\n", err))
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goto cleanup;
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CHECK_STR("hashmap__update", old_key, "a");
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CHECK_STR("hashmap__update", old_value, "apricot");
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err = hashmap__add(map, "b", "banana");
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if (CHECK(err, "hashmap__add", "unexpected error: %d\n", err))
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goto cleanup;
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err = hashmap__set(map, "b", "breadfruit", &old_key, &old_value);
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if (CHECK(err, "hashmap__set", "unexpected error: %d\n", err))
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goto cleanup;
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CHECK_STR("hashmap__set", old_key, "b");
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CHECK_STR("hashmap__set", old_value, "banana");
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err = hashmap__update(map, "b", "blueberry", &old_key, &old_value);
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if (CHECK(err, "hashmap__update", "unexpected error: %d\n", err))
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goto cleanup;
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CHECK_STR("hashmap__update", old_key, "b");
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CHECK_STR("hashmap__update", old_value, "breadfruit");
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err = hashmap__append(map, "c", "cherry");
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if (CHECK(err, "hashmap__append", "unexpected error: %d\n", err))
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goto cleanup;
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if (CHECK(!hashmap__delete(map, "c", &old_key, &old_value),
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"hashmap__delete", "expected to have entry for 'c'\n"))
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goto cleanup;
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CHECK_STR("hashmap__delete", old_key, "c");
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CHECK_STR("hashmap__delete", old_value, "cherry");
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CHECK(!hashmap__find(map, "b", &value), "hashmap__find", "can't find value for 'b'\n");
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CHECK_STR("hashmap__find", value, "blueberry");
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if (CHECK(!hashmap__delete(map, "b", NULL, NULL),
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"hashmap__delete", "expected to have entry for 'b'\n"))
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goto cleanup;
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i = 0;
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hashmap__for_each_entry(map, cur, bkt) {
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if (CHECK(i != 0, "hashmap__for_each_entry", "too many entries"))
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goto cleanup;
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key = cur->pkey;
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value = cur->pvalue;
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CHECK_STR("entry", key, "a");
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CHECK_STR("entry", value, "apple");
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i++;
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}
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#undef CHECK_STR
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cleanup:
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hashmap__free(map);
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}
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static size_t collision_hash_fn(long k, void *ctx)
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{
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return 0;
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}
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static void test_hashmap_multimap(void)
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{
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long k1 = 0, k2 = 1;
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struct hashmap_entry *entry;
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struct hashmap *map;
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long found_msk;
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int err, bkt;
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/* force collisions */
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map = hashmap__new(collision_hash_fn, equal_fn, NULL);
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if (!ASSERT_OK_PTR(map, "hashmap__new"))
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return;
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/* set up multimap:
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* [0] -> 1, 2, 4;
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* [1] -> 8, 16, 32;
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*/
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err = hashmap__append(map, k1, 1);
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if (CHECK(err, "elem_add", "failed to add k/v: %d\n", err))
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goto cleanup;
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err = hashmap__append(map, k1, 2);
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if (CHECK(err, "elem_add", "failed to add k/v: %d\n", err))
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goto cleanup;
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err = hashmap__append(map, k1, 4);
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if (CHECK(err, "elem_add", "failed to add k/v: %d\n", err))
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goto cleanup;
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err = hashmap__append(map, k2, 8);
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if (CHECK(err, "elem_add", "failed to add k/v: %d\n", err))
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goto cleanup;
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err = hashmap__append(map, k2, 16);
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if (CHECK(err, "elem_add", "failed to add k/v: %d\n", err))
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goto cleanup;
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err = hashmap__append(map, k2, 32);
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if (CHECK(err, "elem_add", "failed to add k/v: %d\n", err))
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goto cleanup;
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if (CHECK(hashmap__size(map) != 6, "hashmap_size",
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"invalid map size: %zu\n", hashmap__size(map)))
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goto cleanup;
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/* verify global iteration still works and sees all values */
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found_msk = 0;
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hashmap__for_each_entry(map, entry, bkt) {
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found_msk |= entry->value;
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}
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if (CHECK(found_msk != (1 << 6) - 1, "found_msk",
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"not all keys iterated: %lx\n", found_msk))
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goto cleanup;
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/* iterate values for key 1 */
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found_msk = 0;
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hashmap__for_each_key_entry(map, entry, k1) {
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found_msk |= entry->value;
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}
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if (CHECK(found_msk != (1 | 2 | 4), "found_msk",
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"invalid k1 values: %lx\n", found_msk))
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goto cleanup;
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/* iterate values for key 2 */
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found_msk = 0;
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hashmap__for_each_key_entry(map, entry, k2) {
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found_msk |= entry->value;
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}
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if (CHECK(found_msk != (8 | 16 | 32), "found_msk",
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"invalid k2 values: %lx\n", found_msk))
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goto cleanup;
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cleanup:
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hashmap__free(map);
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}
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static void test_hashmap_empty()
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{
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struct hashmap_entry *entry;
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int bkt;
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struct hashmap *map;
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long k = 0;
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/* force collisions */
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map = hashmap__new(hash_fn, equal_fn, NULL);
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if (!ASSERT_OK_PTR(map, "hashmap__new"))
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goto cleanup;
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if (CHECK(hashmap__size(map) != 0, "hashmap__size",
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"invalid map size: %zu\n", hashmap__size(map)))
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goto cleanup;
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if (CHECK(hashmap__capacity(map) != 0, "hashmap__capacity",
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"invalid map capacity: %zu\n", hashmap__capacity(map)))
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goto cleanup;
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if (CHECK(hashmap__find(map, k, NULL), "elem_find",
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"unexpected find\n"))
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goto cleanup;
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if (CHECK(hashmap__delete(map, k, NULL, NULL), "elem_del",
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"unexpected delete\n"))
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goto cleanup;
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hashmap__for_each_entry(map, entry, bkt) {
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CHECK(false, "elem_found", "unexpected iterated entry\n");
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goto cleanup;
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}
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hashmap__for_each_key_entry(map, entry, k) {
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CHECK(false, "key_found", "unexpected key entry\n");
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goto cleanup;
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}
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cleanup:
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hashmap__free(map);
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}
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void test_hashmap()
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{
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if (test__start_subtest("generic"))
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test_hashmap_generic();
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if (test__start_subtest("multimap"))
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test_hashmap_multimap();
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if (test__start_subtest("empty"))
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test_hashmap_empty();
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if (test__start_subtest("ptr_iface"))
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test_hashmap_ptr_iface();
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}
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