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authorAndrew Tridgell <tridge@samba.org>1999-12-24 08:46:02 +0000
committerAndrew Tridgell <tridge@samba.org>1999-12-24 08:46:02 +0000
commit4a85b76daeb0ef0032e5ac442a123af32d7c2e9e (patch)
treefd6cb248e5406b3a8eb1b99a5f1658af705b5fa7
parentd6a5878c760fcb189faf9ed5aafd2bf294fc38e9 (diff)
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a useful locking tester - it uses lots of simultaneous writers
(This used to be commit 3b3fdd8661cc10057823be4c594e40ca615ca704)
-rw-r--r--source3/tdb/tdbtorture.c117
1 files changed, 117 insertions, 0 deletions
diff --git a/source3/tdb/tdbtorture.c b/source3/tdb/tdbtorture.c
new file mode 100644
index 0000000000..1aac6d4a01
--- /dev/null
+++ b/source3/tdb/tdbtorture.c
@@ -0,0 +1,117 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/time.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 7
+#define STORE_PROB 5
+#define KEYLEN 3
+#define DATALEN 100
+
+static TDB_CONTEXT *db;
+
+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 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 (rand() % DELETE_PROB == 0) {
+ tdb_delete(db, key);
+ } else if (rand() % STORE_PROB == 0) {
+ if (tdb_store(db, key, data, TDB_REPLACE) != 0) {
+ fatal("tdb_store failed");
+ }
+ } 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)
+{
+ tdb_delete(db, key);
+ return 0;
+}
+
+#ifndef NPROC
+#define NPROC 8
+#endif
+
+#ifndef NLOOPS
+#define NLOOPS 50000
+#endif
+
+int main(int argc, char *argv[])
+{
+ int i, seed=0;
+ int loops = NLOOPS;
+
+ unlink("test.tdb");
+
+ for (i=0;i<NPROC-1;i++) {
+ if (fork() == 0) break;
+ }
+
+ db = tdb_open("test.tdb", 0, O_RDWR | O_CREAT, 0600);
+ if (!db) {
+ fatal("db open failed");
+ }
+
+ srand(seed + getpid());
+ for (i=0;i<loops;i++) addrec_db();
+
+ printf("traversed %d records\n", tdb_traverse(db, NULL));
+ printf("traversed %d records\n", tdb_traverse(db, traverse_fn));
+ printf("traversed %d records\n", tdb_traverse(db, traverse_fn));
+
+ tdb_close(db);
+
+ return 0;
+}