1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <stdarg.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/wait.h>
#include "tdb.h"
/* this tests tdb by doing lots of ops from several simultaneous
writers - that stresses the locking code. Build with TDB_DEBUG=1
for best effect */
#define DELETE_PROB 10
#define STORE_PROB 3
#define TRAVERSE_PROB 8
#define CULL_PROB 60
#define KEYLEN 3
#define DATALEN 100
static TDB_CONTEXT *db;
static void tdb_log(TDB_CONTEXT *tdb, int level, const char *format, ...)
{
va_list ap;
va_start(ap, format);
vfprintf(stdout, format, ap);
va_end(ap);
#if 0
{
char *ptr;
asprintf(&ptr,"xterm -e gdb /proc/%d/exe %d", getpid(), getpid());
system(ptr);
free(ptr);
}
#endif
}
static void fatal(char *why)
{
perror(why);
exit(1);
}
static char *randbuf(int len)
{
char *buf;
int i;
buf = (char *)malloc(len+1);
for (i=0;i<len;i++) {
buf[i] = 'a' + (rand() % 26);
}
buf[i] = 0;
return buf;
}
static int cull_traverse(TDB_CONTEXT *db, TDB_DATA key, TDB_DATA dbuf,
void *state)
{
if (random() % CULL_PROB == 0) {
tdb_delete(db, key);
}
return 0;
}
static void addrec_db(void)
{
int klen, dlen;
char *k, *d;
TDB_DATA key, data;
klen = 1 + (rand() % KEYLEN);
dlen = 1 + (rand() % DATALEN);
k = randbuf(klen);
d = randbuf(dlen);
key.dptr = k;
key.dsize = klen+1;
data.dptr = d;
data.dsize = dlen+1;
if (random() % DELETE_PROB == 0) {
tdb_delete(db, key);
} else if (random() % STORE_PROB == 0) {
if (tdb_store(db, key, data, TDB_REPLACE) != 0) {
fatal("tdb_store failed");
}
} else if (random() % TRAVERSE_PROB == 0) {
tdb_traverse(db, cull_traverse, NULL);
} else {
data = tdb_fetch(db, key);
if (data.dptr) free(data.dptr);
}
free(k);
free(d);
}
static int traverse_fn(TDB_CONTEXT *db, TDB_DATA key, TDB_DATA dbuf,
void *state)
{
tdb_delete(db, key);
return 0;
}
#ifndef NPROC
#define NPROC 6
#endif
#ifndef NLOOPS
#define NLOOPS 200000
#endif
int main(int argc, char *argv[])
{
int i, seed=0;
int loops = NLOOPS;
pid_t pids[NPROC];
pids[0] = getpid();
for (i=0;i<NPROC-1;i++) {
if ((pids[i+1]=fork()) == 0) break;
}
db = tdb_open("test.tdb", 0, TDB_CLEAR_IF_FIRST,
O_RDWR | O_CREAT, 0600);
if (!db) {
fatal("db open failed");
}
tdb_logging_function(db, tdb_log);
srand(seed + getpid());
srandom(seed + getpid() + time(NULL));
for (i=0;i<loops;i++) addrec_db();
tdb_traverse(db, NULL, NULL);
tdb_traverse(db, traverse_fn, NULL);
tdb_traverse(db, traverse_fn, NULL);
tdb_close(db);
if (getpid() == pids[0]) {
for (i=0;i<NPROC-1;i++) {
int status;
if (waitpid(pids[i+1], &status, 0) != pids[i+1]) {
printf("failed to wait for %d\n",
(int)pids[i+1]);
exit(1);
}
if (WEXITSTATUS(status) != 0) {
printf("child %d exited with status %d\n",
(int)pids[i+1], WEXITSTATUS(status));
exit(1);
}
}
printf("OK\n");
}
return 0;
}
|
