lock_tester.cc

//
// Lock server tester
//

#include "lock_protocol.h"
#include "lock_client.h"
#include "rpc.h"
#include "jsl_log.h"
#include <signal.h>
#include <arpa/inet.h>
#include <vector>
#include <stdlib.h>
#include <stdio.h>
#include "lang/verify.h"
#include "lock_client_cache.h"

// must be >= 2
int nt = 2; //XXX: lab1's rpc handlers are blocking. Since rpcs uses a thread pool of 10 threads, we cannot test more than 10 blocking rpc.
std::string dst;
lock_client_cache **lc = new lock_client_cache * [nt];
lock_protocol::lockid_t a = 1;
lock_protocol::lockid_t b = 2;
lock_protocol::lockid_t c = 3;

// check_grant() and check_release() check that the lock server
// doesn't grant the same lock to both clients.
// it assumes that lock names are distinct in the first byte.
int ct[256];
pthread_mutex_t count_mutex;

void
check_grant(lock_protocol::lockid_t lid)
{
  ScopedLock ml(&count_mutex);
  int x = lid & 0xff;
  if(ct[x] != 0){
    fprintf(stderr, "error: server granted %016llx twice\n", lid);
    fprintf(stdout, "error: server granted %016llx twice\n", lid);
    exit(1);
  }
  ct[x] += 1;
}

void
check_release(lock_protocol::lockid_t lid)
{
  ScopedLock ml(&count_mutex);
  int x = lid & 0xff;
  if(ct[x] != 1){
    fprintf(stderr, "error: client released un-held lock %016llx\n",  lid);
    exit(1);
  }
  ct[x] -= 1;
}

void
test1(void)
{
  printf ("acquire a release a acquire a release a\n");
  lc[0]->acquire(a);
  check_grant(a);
  lc[0]->release(a);
  check_release(a);

  lc[0]->acquire(a);
  check_grant(a);
  lc[0]->release(a);
  check_release(a);

  printf ("acquire a acquire b release b release a\n");
  lc[0]->acquire(a);
  check_grant(a);
  lc[0]->acquire(b);
  check_grant(b);
  lc[0]->release(b);
  check_release(b);
  lc[0]->release(a);
  check_release(a);
}

void *
test2(void *x)
{
  int i = * (int *) x;

  printf ("test2: client %d acquire a release a\n", i);
  lc[i]->acquire(a);
  printf ("test2: client %d acquire done\n", i);
  check_grant(a);
  sleep(1);
  printf ("test2: client %d release\n", i);
  check_release(a);
  lc[i]->release(a);
  printf ("test2: client %d release done\n", i);
  return 0;
}

void *
test3(void *x)
{
  int i = * (int *) x;

  printf ("test3: client %d acquire a release a concurrent\n", i);
  for (int j = 0; j < 10; j++) {
    lc[i]->acquire(a);
    check_grant(a);
    printf ("test3: client %d got lock\n", i);
    check_release(a);
    lc[i]->release(a);
  }
  return 0;
}

void *
test4(void *x)
{
  int i = * (int *) x;

  printf ("test4: thread %d acquire a release a concurrent; same clnt\n", i);
  for (int j = 0; j < 10; j++) {
    lc[0]->acquire(a);
    check_grant(a);
    printf ("test4: thread %d on client 0 got lock\n", i);
    check_release(a);
    lc[0]->release(a);
  }
  return 0;
}

void *
test5(void *x)
{
  int i = * (int *) x;

  printf ("test5: client %d acquire a release a concurrent; same and diff clnt\n", i);
  for (int j = 0; j < 10; j++) {
    if (i < 5)  lc[0]->acquire(a);
    else  lc[1]->acquire(a);
    check_grant(a);
    printf ("test5: client %d got lock\n", i);
    check_release(a);
    if (i < 5) lc[0]->release(a);
    else lc[1]->release(a);
  }
  return 0;
}

static void
force_exit(int) {
  exit(0);
}

int
main(int argc, char *argv[])
{
  int r;
  pthread_t th[nt];
  int test = 0;

  // Force the lock_server to exit after 20 minutes
  signal(SIGALRM, force_exit);
  alarm(20 * 60);

  setvbuf(stdout, NULL, _IONBF, 0);
  setvbuf(stderr, NULL, _IONBF, 0);
  srandom(getpid());

  //jsl_set_debug(2);

  if(argc < 2) {
    fprintf(stderr, "Usage: %s [host:]port [test]\n", argv[0]);
    exit(1);
  }

  dst = argv[1];

  if (argc > 2) {
    test = atoi(argv[2]);
    if(test < 1 || test > 5){
      printf("Test number must be between 1 and 5\n");
      exit(1);
    }
  }

  VERIFY(pthread_mutex_init(&count_mutex, NULL) == 0);
  printf("cache lock client\n");
  for (int i = 0; i < nt; i++) lc[i] = new lock_client_cache(dst);
  printf("hi\n");
  if(!test || test == 1){
    test1();
  }

  if(!test || test == 2){
    // test2
    for (int i = 0; i < nt; i++) {
      int *a = new int (i);
      r = pthread_create(&th[i], NULL, test2, (void *) a);
      VERIFY (r == 0);
    }
    for (int i = 0; i < nt; i++) {
      pthread_join(th[i], NULL);
    }
  }

  if(!test || test == 3){
    printf("test 3\n");

    // test3
    for (int i = 0; i < nt; i++) {
      int *a = new int (i);
      r = pthread_create(&th[i], NULL, test3, (void *) a);
      VERIFY (r == 0);
    }
    for (int i = 0; i < nt; i++) {
      pthread_join(th[i], NULL);
    }
  }

  if(!test || test == 4){
    printf("test 4\n");

    // test 4
    for (int i = 0; i < 2; i++) {
      int *a = new int (i);
      r = pthread_create(&th[i], NULL, test4, (void *) a);
      VERIFY (r == 0);
    }
    for (int i = 0; i < 2; i++) {
      pthread_join(th[i], NULL);
    }
  }

  if(!test || test == 5){
    printf("test 5\n");

    // test 5

    for (int i = 0; i < nt; i++) {
      int *a = new int (i);
      r = pthread_create(&th[i], NULL, test5, (void *) a);
      VERIFY (r == 0);
    }
    for (int i = 0; i < nt; i++) {
      pthread_join(th[i], NULL);
    }
  }

  printf ("%s: passed all tests successfully\n", argv[0]);

}