mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-14 17:07:38 +00:00
9dfdbd9f0c
Only first previously deleted entry was recognized, leading hsearch_r
to think that there was no previously deleted entry. It then conluded
that a free entry was found, even if there were no free entries and it
overwrote a random entry.
This patch makes sure all deleted or free entries are always found and
also introduces constants for the 0 and -1 numbers. Unit tests to excersise a
simple hash table usage and catch the corruption were added.
To trash your environment, simply run this loop:
setenv i 0
while true; do
setenv v_$i $i
setenv v_$i
setexpr i $i + 1
done
Signed-off-by: Roman Kapl <rka@sysgo.com>
125 lines
2.5 KiB
C
125 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* (C) Copyright 2019
|
|
* Roman Kapl, SYSGO, rka@sysgo.com
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <command.h>
|
|
#include <search.h>
|
|
#include <stdio.h>
|
|
#include <test/env.h>
|
|
#include <test/ut.h>
|
|
|
|
#define SIZE 32
|
|
#define ITERATIONS 10000
|
|
|
|
static int htab_fill(struct unit_test_state *uts,
|
|
struct hsearch_data *htab, size_t size)
|
|
{
|
|
size_t i;
|
|
ENTRY item;
|
|
ENTRY *ritem;
|
|
char key[20];
|
|
|
|
for (i = 0; i < size; i++) {
|
|
sprintf(key, "%d", (int)i);
|
|
item.callback = NULL;
|
|
item.data = key;
|
|
item.flags = 0;
|
|
item.key = key;
|
|
ut_asserteq(1, hsearch_r(item, ENTER, &ritem, htab, 0));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int htab_check_fill(struct unit_test_state *uts,
|
|
struct hsearch_data *htab, size_t size)
|
|
{
|
|
size_t i;
|
|
ENTRY item;
|
|
ENTRY *ritem;
|
|
char key[20];
|
|
|
|
for (i = 0; i < size; i++) {
|
|
sprintf(key, "%d", (int)i);
|
|
item.callback = NULL;
|
|
item.flags = 0;
|
|
item.data = key;
|
|
item.key = key;
|
|
hsearch_r(item, FIND, &ritem, htab, 0);
|
|
ut_assert(ritem);
|
|
ut_asserteq_str(key, ritem->key);
|
|
ut_asserteq_str(key, ritem->data);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int htab_create_delete(struct unit_test_state *uts,
|
|
struct hsearch_data *htab, size_t iterations)
|
|
{
|
|
size_t i;
|
|
ENTRY item;
|
|
ENTRY *ritem;
|
|
char key[20];
|
|
|
|
for (i = 0; i < iterations; i++) {
|
|
sprintf(key, "cd-%d", (int)i);
|
|
item.callback = NULL;
|
|
item.flags = 0;
|
|
item.data = key;
|
|
item.key = key;
|
|
hsearch_r(item, ENTER, &ritem, htab, 0);
|
|
ritem = NULL;
|
|
|
|
hsearch_r(item, FIND, &ritem, htab, 0);
|
|
ut_assert(ritem);
|
|
ut_asserteq_str(key, ritem->key);
|
|
ut_asserteq_str(key, ritem->data);
|
|
|
|
ut_asserteq(1, hdelete_r(key, htab, 0));
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Completely fill up the hash table */
|
|
static int env_test_htab_fill(struct unit_test_state *uts)
|
|
{
|
|
struct hsearch_data htab;
|
|
|
|
memset(&htab, 0, sizeof(htab));
|
|
ut_asserteq(1, hcreate_r(SIZE, &htab));
|
|
|
|
ut_assertok(htab_fill(uts, &htab, SIZE));
|
|
ut_assertok(htab_check_fill(uts, &htab, SIZE));
|
|
ut_asserteq(SIZE, htab.filled);
|
|
|
|
hdestroy_r(&htab);
|
|
return 0;
|
|
}
|
|
|
|
ENV_TEST(env_test_htab_fill, 0);
|
|
|
|
/* Fill the hashtable up halfway an repeateadly delete/create elements
|
|
* and check for corruption
|
|
*/
|
|
static int env_test_htab_deletes(struct unit_test_state *uts)
|
|
{
|
|
struct hsearch_data htab;
|
|
|
|
memset(&htab, 0, sizeof(htab));
|
|
ut_asserteq(1, hcreate_r(SIZE, &htab));
|
|
|
|
ut_assertok(htab_fill(uts, &htab, SIZE / 2));
|
|
ut_assertok(htab_create_delete(uts, &htab, ITERATIONS));
|
|
ut_assertok(htab_check_fill(uts, &htab, SIZE / 2));
|
|
ut_asserteq(SIZE / 2, htab.filled);
|
|
|
|
hdestroy_r(&htab);
|
|
return 0;
|
|
}
|
|
|
|
ENV_TEST(env_test_htab_deletes, 0);
|