stasis-aries-wal/test/stasis/fault_injection/fitest.c

/*---
This software is copyrighted by the Regents of the University of
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associated with the software unless explicitly disclaimed in
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---*/


#include "fitest.h"

testMode currentMode;

int iteration;
int baseKey;
int numThreads;
int opsPerThread;
int opsPerTransaction;
int mallocsBeforeFailure;
int logWritesBeforeFailure;
int pageWritesBeforeFailure;
int logWriteAmountDuringFailure;
int pageWriteAmountDuringFailure;


int main(int argc, char** argv) {
  currentMode = INVALID_MODE;

  if (argc == 1) {
    currentMode = MASTER_MODE;
  }
  else {
    if(!strcmp("-d",argv[1])) {
      currentMode = INTERACTIVE_MODE;
    } else {
      currentMode = (testMode) atoi(argv[1]);
    }
  }
  int err = 0;
  switch (currentMode) {
  case MASTER_MODE:
    err = runMaster(argv[0],0);
    break;

  case INTERACTIVE_MODE:
    err = runMaster(argv[0],1);
    break;

  case SUBJECT_MODE:
    err = runSubject();
    break;

  case CHECKER_MODE:
    err = runChecker();
    break;

  default:
    printf("Usage: %s [-d]\n  -d: Run interactively (facilitates debugging)\n", argv[0]);
    err = 1;
  }

  return err;
}

int
runMaster(const char* execname, int interactive) {
  pid_t pid;
  int numIters, retval, errorFound = 0;
  char modeBuf[20];
  FILE* configFile;

  int fail = 0;

  /* Remove previously generated text files. */
  unlink("logfile.txt");
  unlink("storefile.txt");
  unlink("inserts.txt");
  unlink("commits.txt");
  unlink("recordid.txt");
  unlink("iterinfo.txt");

  configFile = fopen("config.txt", "r");
  fscanf(configFile, "num_iterations = %d\n\n", &numIters);

  baseKey = 0;

  for (iteration = 0; iteration < numIters; iteration++) {

    printf("*** Testing <Iteration %d> ***\n", iteration); fflush(stdout);

    printf("\tRunning Master Process\n"); fflush(stdout);

    /* Read in the configuration for the current iteration and write to the 
     * file "iter.txt".  We will use a shared buffer, instead of a file, to
     * allow the various processes to communicate with each other.
     */
    fscanf(configFile, "num_threads = %d\n", &numThreads);
    fscanf(configFile, "ops_per_thread = %d\n", &opsPerThread);
    fscanf(configFile, "ops_per_transaction = %d\n", &opsPerTransaction);
    fscanf(configFile, "mallocs_before_failure = %d\n", &mallocsBeforeFailure);
    fscanf(configFile, "log_writes_before_failure = %d (%d)\n", 
	   &logWritesBeforeFailure, &logWriteAmountDuringFailure);
    fscanf(configFile, "page_writes_before_failure = %d (%d)\n\n", 
	   &pageWritesBeforeFailure, &pageWriteAmountDuringFailure);

    writeGlobalsToSharedBuffer();

    /* Fork a new process for the 'Subject'. */
    pid = fork();
    
    if (pid == 0) {
      /* We are in the subject process.  */
      sprintf(modeBuf, "%d", (int) SUBJECT_MODE);
      if(!interactive) {
        retval = execl(execname, execname, modeBuf, (char*) 0);
        perror("Couldn't exec subject process");
        abort();
      } else {
        printf("manually run this, then press enter:\n\t%s %s\n", execname, modeBuf);
        getc(stdin);
        exit(0);
      }
    }
    else {
      /* We are in the master process, so wait for the subject process to exit. */
      retval = waitpid(pid, NULL, 0);
      assert(retval != -1);

      /* Fork a new process for the 'Checker'. */
      pid = fork();
      
      if (pid == 0) {
	/* We are in the checker process.  */
	sprintf(modeBuf, "%d", (int) CHECKER_MODE);
        if(!interactive) {
          execl(execname, execname, modeBuf, (char*) 0);
          perror("Couldn't exec checker process");
          abort();
        } else {
          printf("manually run this, then press enter:\n\t%s %s\n", execname, modeBuf);
          getc(stdin);
          exit(0);
        }

      }
      else {
        assert(pid != -1);
	/* We are in the master process, so wait for the checker process to exit. */
	retval = waitpid(pid, &errorFound, 0);
	assert(retval != -1);
	
	/* Exit the loop if an error was found during the checking process. */
	if (errorFound) {
          fail = 1;
          break;
	}
      }
    }

    baseKey += (numThreads * opsPerThread);
  }

  printf("*** Testing Complete: %s ***\n", fail?"FAIL":"PASS"); fflush(stdout);

  fclose(configFile);

  return fail;
}

void
writeGlobalsToSharedBuffer() {
  FILE* iterFile;
  
  iterFile = fopen("iterinfo.txt", "w");
  fprintf(iterFile, "%d %d %d %d %d %d %d %d %d %d\n", 
	  iteration, baseKey, numThreads, opsPerThread, opsPerTransaction, 
	  mallocsBeforeFailure, logWritesBeforeFailure, logWriteAmountDuringFailure, 
	  pageWritesBeforeFailure, pageWriteAmountDuringFailure);
  fclose(iterFile);
}

void
readGlobalsFromSharedBuffer() {
  FILE* iterFile;

  iterFile = fopen("iterinfo.txt", "r");
  fscanf(iterFile, "%d %d %d %d %d %d %d %d %d %d\n", 
	 &iteration, &baseKey, &numThreads, &opsPerThread, &opsPerTransaction, 
	 &mallocsBeforeFailure, &logWritesBeforeFailure, &logWriteAmountDuringFailure, 
	 &pageWritesBeforeFailure, &pageWriteAmountDuringFailure);
  fclose(iterFile);
}