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/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
#ident "$Id$"
/*======
This file is part of PerconaFT.
Copyright (c) 2006, 2015, Percona and/or its affiliates. All rights reserved.
PerconaFT is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2,
as published by the Free Software Foundation.
PerconaFT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with PerconaFT. If not, see <http://www.gnu.org/licenses/>.
----------------------------------------
PerconaFT is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License, version 3,
as published by the Free Software Foundation.
PerconaFT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with PerconaFT. If not, see <http://www.gnu.org/licenses/>.
======= */
#ident "Copyright (c) 2006, 2015, Percona and/or its affiliates. All rights reserved."
// for all i: T(i) reads 0, gets a read lock on 0
// for all i: T(i) writes 0, enters a deadlock
// tokudb detects deadlock on the fly
// --poll runs the deadlock detector until all the txns are resolved
#include "test.h"
#include "toku_pthread.h"
#include <portability/toku_atomic.h>
static void write_row(DB *db, DB_TXN *txn, int k, int v, int expect_r) {
DBT key; dbt_init(&key, &k, sizeof k);
DBT value; dbt_init(&value, &v, sizeof v);
int r = db->put(db, txn, &key, &value, 0); assert(r == expect_r);
}
static void read_row(DB *db, DB_TXN *txn, int k, int expect_r) {
DBT key; dbt_init(&key, &k, sizeof k);
DBT value; dbt_init_malloc(&value);
int r = db->get(db, txn, &key, &value, 0); assert(r == expect_r);
toku_free(value.data);
}
static volatile int n_txns;
struct write_one_arg {
DB_TXN *txn;
DB *db;
int k;
int v;
};
static void *write_one_f(void *arg) {
struct write_one_arg *f_arg = (struct write_one_arg *) arg;
DB_TXN *txn = f_arg->txn;
DB *db = f_arg->db;
int k = f_arg->k;
int v = f_arg->v;
DBT key; dbt_init(&key, &k, sizeof k);
DBT value; dbt_init(&value, &v, sizeof v);
int r = db->put(db, txn, &key, &value, 0);
if (verbose)
printf("%s %p %d\n", __FUNCTION__, arg, r);
assert(r == 0 || r == DB_LOCK_DEADLOCK);
if (r == 0) {
r = txn->commit(txn, 0); assert(r == 0);
} else {
r = txn->abort(txn); assert(r == 0);
}
(void) toku_sync_fetch_and_sub(&n_txns, 1);
return arg;
}
static void update_deadlock(DB_ENV *db_env, DB *db, int do_txn, int nrows, int ntxns, int poll_deadlock UU()) {
int r;
// populate the initial tree
DB_TXN *txn_init = NULL;
if (do_txn) {
r = db_env->txn_begin(db_env, NULL, &txn_init, 0); assert(r == 0);
}
for (int k = 0; k < nrows; k++) {
write_row(db, txn_init, htonl(k), k, 0);
}
if (do_txn) {
r = txn_init->commit(txn_init, 0); assert(r == 0);
}
// create the transactions
n_txns = ntxns;
DB_TXN *txns[ntxns];
for (int i = 0; i < ntxns; i++) {
txns[i] = NULL;
if (do_txn) {
r = db_env->txn_begin(db_env, NULL, &txns[i], 0); assert(r == 0);
}
}
#ifdef BLOCKING_ROW_LOCKS_READS_NOT_SHARED
// spice this test up a bit when reads locks are not shared.
// test that a dining philosopher's style deadlock is detected
// by having each txn take a distinct read lock, and then request
// a write lock on the value "next" to it (i + 1 mod ntxns)
// get read locks
for (int i = 0; i < ntxns; i++) {
read_row(db, txns[i], htonl(i), 0);
}
// get write locks
toku_pthread_t tids[ntxns];
for (int i = 0 ; i < ntxns; i++) {
struct write_one_arg *XMALLOC(arg);
*arg = (struct write_one_arg) { txns[i], db, (int) htonl((i + 1) % ntxns), 0};
r = toku_pthread_create(&tids[i], NULL, write_one_f, arg);
}
#else
// get read locks
for (int i = 0; i < ntxns; i++) {
read_row(db, txns[i], htonl(0), 0);
}
// get write locks
toku_pthread_t tids[ntxns];
for (int i = 0 ; i < ntxns; i++) {
struct write_one_arg *XMALLOC(arg);
*arg = (struct write_one_arg) { txns[i], db, (int) htonl(0), 0};
r = toku_pthread_create(&tids[i], NULL, write_one_f, arg);
}
#endif
// cleanup
for (int i = 0; i < ntxns; i++) {
void *ret = NULL;
r = toku_pthread_join(tids[i], &ret); assert(r == 0); toku_free(ret);
}
}
int test_main(int argc, char * const argv[]) {
uint64_t cachesize = 0;
uint32_t pagesize = 0;
int do_txn = 1;
int nrows = 1000;
int ntxns = 2;
int poll_deadlock = 0;
const char *db_env_dir = TOKU_TEST_FILENAME;
const char *db_filename = "simple_deadlock";
int db_env_open_flags = DB_CREATE | DB_PRIVATE | DB_INIT_MPOOL | DB_INIT_TXN | DB_INIT_LOCK | DB_INIT_LOG | DB_THREAD;
// parse_args(argc, argv);
for (int i = 1; i < argc; i++) {
if (strcmp(argv[i], "-v") == 0 || strcmp(argv[i], "--verbose") == 0) {
verbose++;
continue;
}
if (strcmp(argv[i], "-q") == 0 || strcmp(argv[i], "--quiet") == 0) {
if (verbose > 0)
verbose--;
continue;
}
if (strcmp(argv[i], "--nrows") == 0 && i+1 < argc) {
nrows = atoi(argv[++i]);
continue;
}
if (strcmp(argv[i], "--ntxns") == 0 && i+1 < argc) {
ntxns = atoi(argv[++i]);
continue;
}
if (strcmp(argv[i], "--poll") == 0) {
poll_deadlock = 1;
continue;
}
assert(0);
}
// setup env
int r;
char rm_cmd[strlen(db_env_dir) + strlen("rm -rf ") + 1];
snprintf(rm_cmd, sizeof(rm_cmd), "rm -rf %s", db_env_dir);
r = system(rm_cmd); assert(r == 0);
r = toku_os_mkdir(db_env_dir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); assert(r == 0);
DB_ENV *db_env = NULL;
r = db_env_create(&db_env, 0); assert(r == 0);
if (cachesize) {
const uint64_t gig = 1 << 30;
r = db_env->set_cachesize(db_env, cachesize / gig, cachesize % gig, 1); assert(r == 0);
}
if (!do_txn)
db_env_open_flags &= ~(DB_INIT_TXN | DB_INIT_LOG);
r = db_env->open(db_env, db_env_dir, db_env_open_flags, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); assert(r == 0);
r = db_env->set_lock_timeout(db_env, 30 * 1000, nullptr); assert(r == 0);
// create the db
DB *db = NULL;
r = db_create(&db, db_env, 0); assert(r == 0);
DB_TXN *create_txn = NULL;
if (do_txn) {
r = db_env->txn_begin(db_env, NULL, &create_txn, 0); assert(r == 0);
}
if (pagesize) {
r = db->set_pagesize(db, pagesize); assert(r == 0);
}
r = db->open(db, create_txn, db_filename, NULL, DB_BTREE, DB_CREATE, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH); assert(r == 0);
if (do_txn) {
r = create_txn->commit(create_txn, 0); assert(r == 0);
}
// run test
update_deadlock(db_env, db, do_txn, nrows, ntxns, poll_deadlock);
// close env
r = db->close(db, 0); assert(r == 0); db = NULL;
r = db_env->close(db_env, 0); assert(r == 0); db_env = NULL;
return 0;
}
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