stasis-aries-wal/test/lladd/check_logWriter.c

/*---
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---*/

#include <config.h>
#include <check.h>

#include <lladd/transactional.h>
/*#include <lladd/logger/logEntry.h> */
#include "../../src/lladd/logger/logHandle.h"
#include "../../src/lladd/logger/logWriter.h"

#include "../../src/lladd/latches.h"
#include <sched.h>
#include <assert.h>
#include "../check_includes.h"



#define LOG_NAME   "check_logWriter.log"

static void setup_log() {
  int i;
  lsn_t prevLSN = -1;
  int xid = 100;

  Tinit();

  deleteLogWriter();
  openLogWriter();
  
  for(i = 0 ; i < 1000; i++) {
    LogEntry * e = allocCommonLogEntry(prevLSN, xid, XBEGIN);
    LogEntry * f;
    recordid rid;
    byte * args = (byte*)"Test 123.";
    long args_size = 10;  /* Including null */
    unsigned long preImage = 42;

    rid.page = 0;
    rid.slot = 0;
    rid.size = sizeof(unsigned long);

    writeLogEntry(e);
    prevLSN = e->LSN;
    
    f = readLSNEntry(prevLSN);
    fail_unless(sizeofLogEntry(e) == sizeofLogEntry(f), "Log entry changed size!!");
    fail_unless(0 == memcmp(e,f,sizeofLogEntry(e)), "Log entries did not agree!!");

    free (e);
    free (f);

    e = allocUpdateLogEntry(prevLSN, xid, 1, rid, args, args_size, (byte*) &preImage);
    writeLogEntry(e);
    prevLSN = e->prevLSN;
    f = allocCLRLogEntry(100, 1, 200, rid, prevLSN);

    prevLSN = f->prevLSN; 
    
    writeLogEntry(f);
    free (e);
    free (f);
  }
}
/**
   @test 

   Quick test of log writer and log handler.  Not very extensive.
   Just writes out 3000 log entries, checks that 1000 of them make
   sense, and then closes, opens and iterates over the resulting log
   file to make sure that it contains 3000 entries, and none of its
   builtin assertions fail.

   In particular, logWriter checks to make sure that each log entry's
   size matches the size that it recorded before the logEntry.  Also,
   when checking the 1000 of 3000 entries, this test uses
   readLSNEntry, which tests the logWriter's ability to succesfully
   manipulate LSN's.

   @todo Test logHandle more thoroughly. (Still need to test the guard mechanism.)

*/
START_TEST(logWriterTest)
{
  LogEntry * e;
  LogHandle h;
  int i = 0;


  setup_log();
  syncLog();
  closeLogWriter();

  openLogWriter();

  
  h = getLogHandle();
  /*  readLSNEntry(sizeof(lsn_t)); */

  while((e = nextInLog(&h))) {
    i++;
  }


  fail_unless(i = 3000, "Wrong number of log entries!");

  deleteLogWriter();


}
END_TEST

/** 
    @test
    Checks for a bug ecountered during devlopment.  What happens when
    previousInTransaction is called immediately after the handle is
    allocated? */

START_TEST(logHandleColdReverseIterator) {
  LogEntry * e;
  LogHandle lh = getLogHandle();
  int i = 0;
  setup_log();


  while(((e = nextInLog(&lh)) && (i < 100)) ) {
    i++;
  }
  
  i = 0;
  lh = getLogHandle(e->LSN);

  while((e = previousInTransaction(&lh))) {
    i++;
  }
  /*  printf("i = %d\n", i); */
  fail_unless( i == 1 , NULL);  /* The 1 is because we immediately hit a clr that goes to the beginning of the log... */

 deleteLogWriter();

}
END_TEST

/** 
    @test

    Build a simple log, truncate it, and then test the logWriter routines against it.
*/
START_TEST(logWriterTruncate) {
  LogEntry * le;
  LogEntry * le2;
  LogEntry * le3 = NULL;
  LogEntry * tmp;

  LogHandle lh = getLogHandle();
  int i = 0;
  setup_log();

  while(i < 234) {
    i++;
    le = nextInLog(&lh);
  }
 
  le2 = nextInLog(&lh);
  i = 0;
  while(i < 23) {
    i++;
    le3 = nextInLog(&lh);
  }
  

  truncateLog(le->LSN);
  
  tmp = readLSNEntry(le->LSN);

  fail_unless(NULL != tmp, NULL);
  fail_unless(tmp->LSN == le->LSN, NULL);
  
  tmp = readLSNEntry(le2->LSN);

  fail_unless(NULL != tmp, NULL);
  fail_unless(tmp->LSN == le2->LSN, NULL);

  tmp = readLSNEntry(le3->LSN);

  fail_unless(NULL != tmp, NULL);
  fail_unless(tmp->LSN == le3->LSN, NULL);


  lh = getLogHandle();
  
  i = 0;

  while((le = nextInLog(&lh))) {
    i++;
  }


  fail_unless(i == (3000 - 234 + 1), NULL);
  

} END_TEST

#define ENTRIES_PER_THREAD 1000

pthread_mutex_t random_mutex;

static void* worker_thread(void * arg) {
  int key = *(int*)arg;
  int i = 0;
  int truncated_to = 4;

  LogEntry * le = allocCommonLogEntry(-1, -1, XBEGIN);

  int lsns[ENTRIES_PER_THREAD];


  /*  fail_unless(NULL != le, NULL); */

  while(i < ENTRIES_PER_THREAD) {
    int threshold;
    int entry;

    pthread_mutex_lock(&random_mutex);

    threshold = (int) (2000.0*random()/(RAND_MAX+1.0));
    entry = (int) (ENTRIES_PER_THREAD*random()/(RAND_MAX+1.0));

    pthread_mutex_unlock(&random_mutex);

    /*    fail_unless(threshold <= 100, NULL); */

    if(threshold < 3) {
      if(i > 10) {
	/* Truncate the log .15% of the time; result in a bit over 100 truncates per test run.*/
	/*	fail_unless(1, NULL); */

	truncateLog(lsns[i - 10]);
	truncated_to = i - 10;
      } 
      /*      fail_unless(1, NULL); */
    } else {

      /*      DEBUG("i = %d, le = %x\n", i, (unsigned int)le); */
      /*      fail_unless(1, NULL); */
      le->xid = i+key;
      writeLogEntry(le);
      lsns[i] = le->LSN;
      i++;
    }
    /*    fail_unless(1, NULL); */
    if(entry > truncated_to && entry < i) {
      assert(readLSNEntry(lsns[entry])->xid == entry+key);
      /*      fail_unless(readLSNEntry(lsns[entry])->xid == entry+key, NULL); */
    }
    /*    fail_unless(1, NULL); */
	
    /* Try to interleave requests as much as possible */
    /*pthread_yield(); */
    sched_yield();

  }

  free(le);

  return 0;
}

START_TEST(logWriterCheckWorker) {
  int four = 4;

  pthread_mutex_init(&random_mutex, NULL);

  Tinit();
  worker_thread(&four);
  Tdeinit();

} END_TEST

START_TEST(logWriterCheckThreaded) {

#define  THREAD_COUNT 50
  pthread_t workers[THREAD_COUNT];
  int i;
  pthread_mutex_init(&random_mutex, NULL);

  Tinit();

  for(i = 0; i < THREAD_COUNT; i++) {
    pthread_create(&workers[i], NULL, worker_thread, &i);
  }
  for(i = 0; i < THREAD_COUNT; i++) {
    pthread_join(workers[i], NULL);
  }
  Tdeinit();

} END_TEST


Suite * check_suite(void) {
  Suite *s = suite_create("logWriter");
  /* Begin a new test */
  TCase *tc = tcase_create("writeNew");

  /* Sub tests are added, one per line, here */

  tcase_add_test(tc, logWriterTest);
  tcase_add_test(tc, logHandleColdReverseIterator);
  tcase_add_test(tc, logWriterTruncate);
  tcase_add_test(tc, logWriterCheckWorker);
  tcase_add_test(tc, logWriterCheckThreaded);

  /* --------------------------------------------- */
  
  tcase_add_checked_fixture(tc, setup, teardown);


  suite_add_tcase(s, tc);
  return s;
}

#include "../check_setup.h"