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   1 /*  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
   2  *
   3  *  Libmemcached Client and Server
   4  *
   5  *  Copyright (C) 2011 Data Differential, http://datadifferential.com/
   6  *  All rights reserved.
   7  *
   8  *  Redistribution and use in source and binary forms, with or without
   9  *  modification, are permitted provided that the following conditions are
  10  *  met:
  11  *
  12  *      * Redistributions of source code must retain the above copyright
  13  *  notice, this list of conditions and the following disclaimer.
  14  *
  15  *      * Redistributions in binary form must reproduce the above
  16  *  copyright notice, this list of conditions and the following disclaimer
  17  *  in the documentation and/or other materials provided with the
  18  *  distribution.
  19  *
  20  *      * The names of its contributors may not be used to endorse or
  21  *  promote products derived from this software without specific prior
  22  *  written permission.
  23  *
  24  *  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  25  *  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  26  *  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  27  *  A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  28  *  OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  29  *  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  30  *  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  31  *  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  32  *  THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  33  *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  34  *  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  35  *
  36  */
  37
  38 #include <mem_config.h>
  39 #include <libtest/test.hpp>
  40
  41 using namespace libtest;
  42
  43 #include <vector>
  44 #include <iostream>
  45 #include <string>
  46 #include <cerrno>
  47
  48 #include <semaphore.h>
  49
  50 #include <libmemcached-1.0/memcached.h>
  51 #include <libmemcachedutil-1.0/util.h>
  52 #include <libmemcached/is.h>
  53 #include <tests/pool.h>
  54
  55 #include <pthread.h>
  56 #include <poll.h>
  57
  58 #include "libmemcached/instance.hpp"
  59
  60 #ifndef __INTEL_COMPILER
  61 #pragma GCC diagnostic ignored "-Wstrict-aliasing"
  62 #endif
  63
  64
  65 test_return_t memcached_pool_test(memcached_st *)
  66 {
  67   const char *config_string= "--SERVER=host10.example.com --SERVER=host11.example.com --SERVER=host10.example.com --POOL-MIN=10 --POOL-MAX=32";
  68
  69   char buffer[2048];
  70
  71   test_compare(libmemcached_check_configuration(config_string, sizeof(config_string) -1, buffer, sizeof(buffer)), MEMCACHED_PARSE_ERROR);
  72
  73   memcached_pool_st* pool= memcached_pool(config_string, strlen(config_string));
  74   test_true(pool);
  75
  76   memcached_return_t rc;
  77   memcached_st *memc= memcached_pool_pop(pool, false, &rc);
  78
  79   test_compare(rc, MEMCACHED_SUCCESS);
  80   test_true(memc);
  81
  82   /*
  83     Release the memc_ptr that was pulled from the pool
  84   */
  85   memcached_pool_push(pool, memc);
  86
  87   /*
  88     Destroy the pool.
  89   */
  90   memcached_pool_destroy(pool);
  91
  92   return TEST_SUCCESS;
  93 }
  94
  95
  96 #define POOL_SIZE 10
  97 test_return_t connection_pool_test(memcached_st *memc)
  98 {
  99   memcached_pool_st* pool= memcached_pool_create(memc, 5, POOL_SIZE);
 100   test_true(pool);
 101   memcached_st *mmc[POOL_SIZE];
 102
 103   // Fill up our array that we will store the memc that are in the pool
 104   for (size_t x= 0; x < POOL_SIZE; ++x)
 105   {
 106     memcached_return_t rc;
 107     mmc[x]= memcached_pool_fetch(pool, NULL, &rc);
 108     test_compare(MEMCACHED_SUCCESS, rc);
 109     test_true(mmc[x]);
 110   }
 111
 112   // All memc should be gone
 113   {
 114     memcached_return_t rc;
 115     test_null(memcached_pool_fetch(pool, NULL, &rc));
 116     test_compare(MEMCACHED_NOTFOUND, rc);
 117   }
 118
 119   // Release them..
 120   for (size_t x= 0; x < POOL_SIZE; ++x)
 121   {
 122     if (mmc[x])
 123     {
 124       test_compare(MEMCACHED_SUCCESS, memcached_pool_release(pool, mmc[x]));
 125     }
 126   }
 127   test_true(memcached_pool_destroy(pool) == memc);
 128
 129   return TEST_SUCCESS;
 130 }
 131
 132 test_return_t connection_pool2_test(memcached_st *memc)
 133 {
 134   memcached_pool_st* pool= memcached_pool_create(memc, 5, POOL_SIZE);
 135   test_true(pool);
 136   memcached_st *mmc[POOL_SIZE];
 137
 138   // Fill up our array that we will store the memc that are in the pool
 139   for (size_t x= 0; x < POOL_SIZE; ++x)
 140   {
 141     memcached_return_t rc;
 142     mmc[x]= memcached_pool_fetch(pool, NULL, &rc);
 143     test_compare(MEMCACHED_SUCCESS, rc);
 144     test_true(mmc[x]);
 145   }
 146
 147   // All memc should be gone
 148   {
 149     memcached_return_t rc;
 150     test_null(memcached_pool_fetch(pool, NULL, &rc));
 151     test_compare(MEMCACHED_NOTFOUND, rc);
 152   }
 153
 154   // verify that I can do ops with all connections
 155   test_compare(MEMCACHED_SUCCESS,
 156                memcached_set(mmc[0],
 157                              test_literal_param("key"),
 158                              "0", 1, 0, 0));
 159
 160   for (uint64_t x= 0; x < POOL_SIZE; ++x)
 161   {
 162     uint64_t number_value;
 163     test_compare(MEMCACHED_SUCCESS,
 164                  memcached_increment(mmc[x],
 165                                      test_literal_param("key"),
 166                                      1, &number_value));
 167     test_compare(number_value, (x+1));
 168   }
 169
 170   // Release them..
 171   for (size_t x= 0; x < POOL_SIZE; ++x)
 172   {
 173     test_compare(MEMCACHED_SUCCESS, memcached_pool_release(pool, mmc[x]));
 174   }
 175
 176
 177   /* verify that I can set behaviors on the pool when I don't have all
 178    * of the connections in the pool. It should however be enabled
 179    * when I push the item into the pool
 180  */
 181   mmc[0]= memcached_pool_fetch(pool, NULL, NULL);
 182   test_true(mmc[0]);
 183
 184   test_compare(MEMCACHED_SUCCESS,
 185                memcached_pool_behavior_set(pool, MEMCACHED_BEHAVIOR_IO_MSG_WATERMARK, 9999));
 186
 187   {
 188     memcached_return_t rc;
 189     mmc[1]= memcached_pool_fetch(pool, NULL, &rc);
 190     test_true(mmc[1]);
 191     test_compare(MEMCACHED_SUCCESS, rc);
 192   }
 193
 194   test_compare(UINT64_C(9999), memcached_behavior_get(mmc[1], MEMCACHED_BEHAVIOR_IO_MSG_WATERMARK));
 195   test_compare(MEMCACHED_SUCCESS, memcached_pool_release(pool, mmc[1]));
 196   test_compare(MEMCACHED_SUCCESS, memcached_pool_release(pool, mmc[0]));
 197
 198   {
 199     memcached_return_t rc;
 200     mmc[0]= memcached_pool_fetch(pool, NULL, &rc);
 201     test_true(mmc[0]);
 202     test_compare(MEMCACHED_SUCCESS, rc);
 203   }
 204
 205   test_compare(UINT64_C(9999), memcached_behavior_get(mmc[0], MEMCACHED_BEHAVIOR_IO_MSG_WATERMARK));
 206   test_compare(MEMCACHED_SUCCESS, memcached_pool_release(pool, mmc[0]));
 207
 208   test_true(memcached_pool_destroy(pool) == memc);
 209
 210   return TEST_SUCCESS;
 211 }
 212
 213 struct test_pool_context_st {
 214   volatile memcached_return_t rc;
 215   memcached_pool_st* pool;
 216   memcached_st* mmc;
 217   sem_t _lock;
 218
 219   test_pool_context_st(memcached_pool_st *pool_arg, memcached_st *memc_arg):
 220     rc(MEMCACHED_FAILURE),
 221     pool(pool_arg),
 222     mmc(memc_arg)
 223   {
 224     sem_init(&_lock, 0, 0);
 225   }
 226
 227   void wait()
 228   {
 229     sem_wait(&_lock);
 230   }
 231
 232   void release()
 233   {
 234     sem_post(&_lock);
 235   }
 236
 237   ~test_pool_context_st()
 238   {
 239     sem_destroy(&_lock);
 240   }
 241 };
 242
 243 static __attribute__((noreturn)) void* connection_release(void *arg)
 244 {
 245   test_pool_context_st *resource= static_cast<test_pool_context_st *>(arg);
 246   FATAL_IF(resource == NULL);
 247
 248   // Release all of the memc we are holding
 249   resource->rc= memcached_pool_release(resource->pool, resource->mmc);
 250   resource->release();
 251
 252   pthread_exit(arg);
 253 }
 254
 255 test_return_t connection_pool3_test(memcached_st *memc)
 256 {
 257 #ifdef __APPLE__
 258   return TEST_SKIPPED;
 259 #endif
 260
 261   memcached_pool_st* pool= memcached_pool_create(memc, 1, 1);
 262   test_true(pool);
 263
 264   memcached_st *pool_memc;
 265   {
 266     memcached_return_t rc;
 267     pool_memc= memcached_pool_fetch(pool, NULL, &rc);
 268     test_compare(MEMCACHED_SUCCESS, rc);
 269     test_true(pool_memc);
 270   }
 271
 272   /*
 273     @note This comment was written to describe what was believed to be the original authors intent.
 274
 275     This portion of the test creates a thread that will wait until told to free a memcached_st
 276     that will be grabbed by the main thread.
 277
 278     It is believed that this tests whether or not we are handling ownership correctly.
 279   */
 280   pthread_t tid;
 281   test_pool_context_st item(pool, pool_memc);
 282
 283   test_zero(pthread_create(&tid, NULL, connection_release, &item));
 284   item.wait();
 285
 286   memcached_return_t rc;
 287   memcached_st *pop_memc;
 288   // We do a hard loop, and try N times
 289   int counter= 5;
 290   do
 291   {
 292     struct timespec relative_time= { 0, 0 };
 293     pop_memc= memcached_pool_fetch(pool, &relative_time, &rc);
 294
 295     if (memcached_success(rc))
 296     {
 297       break;
 298     }
 299
 300     if (memcached_failed(rc))
 301     {
 302       test_null(pop_memc);
 303       test_true(rc != MEMCACHED_TIMEOUT); // As long as relative_time is zero, MEMCACHED_TIMEOUT is invalid
 304     }
 305   } while (--counter);
 306
 307   if (memcached_failed(rc)) // Cleanup thread since we will exit once we test.
 308   {
 309     pthread_join(tid, NULL);
 310     test_compare(MEMCACHED_SUCCESS, rc);
 311   }
 312
 313   {
 314     int pthread_ret= pthread_join(tid, NULL);
 315     test_true(pthread_ret == 0 or pthread_ret == ESRCH);
 316   }
 317   test_compare(MEMCACHED_SUCCESS, rc);
 318   test_true(pool_memc == pop_memc);
 319
 320   test_true(memcached_pool_destroy(pool) == memc);
 321
 322   return TEST_SUCCESS;
 323 }
 324
 325 static memcached_st * create_single_instance_memcached(const memcached_st *original_memc, const char *options)
 326 {
 327   /*
 328     If no options are given, copy over at least the binary flag.
 329   */
 330   char options_buffer[1024]= { 0 };
 331   if (options == NULL)
 332   {
 333     if (memcached_is_binary(original_memc))
 334     {
 335       snprintf(options_buffer, sizeof(options_buffer), "--BINARY");
 336     }
 337   }
 338
 339   /*
 340    * I only want to hit _one_ server so I know the number of requests I'm
 341    * sending in the pipeline.
 342    */
 343   const memcached_instance_st * instance= memcached_server_instance_by_position(original_memc, 0);
 344
 345   char server_string[1024];
 346   int server_string_length;
 347   if (instance->type == MEMCACHED_CONNECTION_UNIX_SOCKET)
 348   {
 349     if (options)
 350     {
 351       server_string_length= snprintf(server_string, sizeof(server_string), "--SOCKET=\"%s\" %s",
 352                                      memcached_server_name(instance), options);
 353     }
 354     else
 355     {
 356       server_string_length= snprintf(server_string, sizeof(server_string), "--SOCKET=\"%s\"",
 357                                      memcached_server_name(instance));
 358     }
 359   }
 360   else
 361   {
 362     if (options)
 363     {
 364       server_string_length= snprintf(server_string, sizeof(server_string), "--server=%s:%d %s",
 365                                      memcached_server_name(instance), int(memcached_server_port(instance)),
 366                                      options);
 367     }
 368     else
 369     {
 370       server_string_length= snprintf(server_string, sizeof(server_string), "--server=%s:%d",
 371                                      memcached_server_name(instance), int(memcached_server_port(instance)));
 372     }
 373   }
 374
 375   if (server_string_length <= 0)
 376   {
 377     return NULL;
 378   }
 379
 380   char errror_buffer[1024];
 381   if (memcached_failed(libmemcached_check_configuration(server_string, server_string_length, errror_buffer, sizeof(errror_buffer))))
 382   {
 383     Error << "Failed to parse (" << server_string << ") " << errror_buffer;
 384     return NULL;
 385   }
 386
 387   return memcached(server_string, server_string_length);
 388 }
 389
 390 pthread_mutex_t mutex= PTHREAD_MUTEX_INITIALIZER;
 391 static bool _running= false;
 392
 393 static void set_running(const bool arg)
 394 {
 395   int error;
 396   FATAL_IF_((error= pthread_mutex_lock(&mutex)) != 0, strerror(error));
 397
 398   _running= arg;
 399
 400   FATAL_IF_((error= pthread_mutex_unlock(&mutex)) != 0, strerror(error));
 401 }
 402
 403 static bool running()
 404 {
 405   int error;
 406   bool ret;
 407
 408   FATAL_IF_((error= pthread_mutex_lock(&mutex)) != 0, strerror(error));
 409
 410   ret= _running;
 411
 412   FATAL_IF_((error= pthread_mutex_unlock(&mutex)) != 0, strerror(error));
 413
 414   return ret;
 415 }
 416
 417 static void *worker_thread(void *ctx)
 418 {
 419   memcached_pool_st *pool= (memcached_pool_st *)ctx;
 420
 421   while (running())
 422   {
 423     memcached_return_t rc;
 424     memcached_st *mc= memcached_pool_pop(pool, true, &rc);
 425
 426     if (mc == NULL)
 427     {
 428       Error << "failed to fetch a connection from the pool" << memcached_strerror(NULL, rc);
 429       dream(1, 0);
 430       continue;
 431     }
 432
 433     rc= memcached_set(mc, "test:kv", 7, "value", 5, 600, 0);
 434     if (memcached_failed(rc))
 435     {
 436       Out << "failed memcached_set()";
 437     }
 438
 439     rc= memcached_pool_push(pool, mc);
 440     if (memcached_failed(rc))
 441     {
 442       Error << "failed to release a connection to the pool" << memcached_strerror(NULL, rc);
 443     }
 444   }
 445
 446   return NULL;
 447 }
 448
 449 #define NUM_THREADS 20
 450 test_return_t regression_bug_962815(memcached_st *memc)
 451 {
 452   pthread_t pid[NUM_THREADS];
 453
 454   test_false(running());
 455
 456   memcached_st *master = create_single_instance_memcached(memc, 0);
 457   test_true(master);
 458
 459   memcached_pool_st *pool= memcached_pool_create(master, 5, 10);
 460
 461   test_true(pool);
 462
 463   set_running(true);
 464
 465   for (size_t x=0; x < NUM_THREADS; x++)
 466   {
 467     test_compare(0, pthread_create(&pid[x], NULL, worker_thread, (void*)pool));
 468   }
 469
 470   {
 471     pollfd fds[1];
 472     memset(fds, 0, sizeof(pollfd));
 473     fds[0].fd= -1; //STDIN_FILENO;
 474     fds[0].events= POLLIN;
 475     fds[0].revents= 0;
 476
 477     int active_fd;
 478     if ((active_fd= poll(fds, 1, 5000)) == -1)
 479     {
 480       Error << "poll() failed with:" << strerror(errno);
 481     }
 482     test_zero(active_fd);
 483
 484     set_running(false);
 485   }
 486
 487   for (size_t x=0; x < NUM_THREADS; x++)
 488   {
 489     test_compare(0, pthread_join(pid[x], NULL));
 490   }
 491
 492   memcached_pool_destroy(pool);
 493
 494   memcached_free(master);
 495
 496   return TEST_SUCCESS;
 497 }