attach2.c File Reference

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Functions
static int	wait_for_attach_and_loop (void)
int	main (int argc, char **argv)

Function Documentation

main()

int main	(	int	argc,
		char **	argv
	)

Definition at line 59 of file attach2.c.

{
    int status, retval, tmp;
    int EventSet1 = PAPI_NULL;
    long long **values;
    long long elapsed_us, elapsed_cyc, elapsed_virt_us, elapsed_virt_cyc;
    char event_name[PAPI_MAX_STR_LEN];;
    const PAPI_hw_info_t *hw_info;
    const PAPI_component_info_t *cmpinfo;
    pid_t pid;
    int quiet;

    /* Fork before doing anything with the PMU */

    setbuf(stdout,NULL);
    pid = fork(  );
    if ( pid < 0 )
        test_fail( __FILE__, __LINE__, "fork()", PAPI_ESYS );
    if ( pid == 0 )
        exit( wait_for_attach_and_loop(  ) );

    /* Set TESTS_QUIET variable */
    quiet=tests_quiet( argc, argv );


    /* Master only process below here */

    retval = PAPI_library_init( PAPI_VER_CURRENT );
    if ( retval != PAPI_VER_CURRENT )
        test_fail( __FILE__, __LINE__, "PAPI_library_init", retval );

    if ( ( cmpinfo = PAPI_get_component_info( 0 ) ) == NULL )
        test_fail( __FILE__, __LINE__, "PAPI_get_component_info", 0 );

    if ( cmpinfo->attach == 0 )
        test_skip( __FILE__, __LINE__, "Platform does not support attaching",
                   0 );

    hw_info = PAPI_get_hardware_info(  );
    if ( hw_info == NULL )
        test_fail( __FILE__, __LINE__, "PAPI_get_hardware_info", 0 );

    /* add PAPI_TOT_CYC and one of the events in PAPI_FP_INS, PAPI_FP_OPS or
       PAPI_TOT_INS, depending on the availability of the event on the
       platform */
    retval = PAPI_create_eventset(&EventSet1);
    if ( retval != PAPI_OK )
        test_fail( __FILE__, __LINE__, "PAPI_create_eventset", retval );

    /* Here we are testing that this does not cause a fail */

    retval = PAPI_assign_eventset_component( EventSet1, 0 );
    if ( retval != PAPI_OK )
        test_fail( __FILE__, __LINE__, "PAPI_assign_eventset_component",
        retval );

    retval = PAPI_attach( EventSet1, ( unsigned long ) pid );
    if ( retval != PAPI_OK ) {
        if (!quiet) printf("Cannot attach: %s\n",PAPI_strerror(retval));
        test_skip( __FILE__, __LINE__, "PAPI_attach", retval );
    }

    retval = PAPI_add_event(EventSet1, PAPI_TOT_CYC);
    if ( retval != PAPI_OK ) {
        if (!quiet) printf("Problem adding PAPI_TOT_CYC\n");
        test_skip( __FILE__, __LINE__, "PAPI_add_event", retval );
    }

    strcpy(event_name,"PAPI_FP_INS");

    retval = PAPI_add_named_event(EventSet1, event_name);
    if ( retval == PAPI_ENOEVNT ) {
        strcpy(event_name,"PAPI_TOT_INS");
        retval = PAPI_add_named_event(EventSet1, event_name);
    }

    if ( retval != PAPI_OK ) {
        test_fail( __FILE__, __LINE__, "PAPI_add_event", retval );
    }

    values = allocate_test_space( 1, 2);

    elapsed_us = PAPI_get_real_usec(  );

    elapsed_cyc = PAPI_get_real_cyc(  );

    elapsed_virt_us = PAPI_get_virt_usec(  );

    elapsed_virt_cyc = PAPI_get_virt_cyc(  );

    if (!quiet) printf("must_ptrace is %d\n",cmpinfo->attach_must_ptrace);
    pid_t  child = wait( &status );
    if (!quiet) printf( "Debugger exited wait() with %d\n",child );
      if (WIFSTOPPED( status ))
        {
          if (!quiet) printf( "Child has stopped due to signal %d (%s)\n",
              WSTOPSIG( status ), strsignal(WSTOPSIG( status )) );
        }
      if (WIFSIGNALED( status ))
        {
          if (!quiet) printf( "Child %ld received signal %d (%s)\n",
              (long)child,
              WTERMSIG(status) , strsignal(WTERMSIG( status )) );
        }
    if (!quiet) printf("After %d\n",retval);

    retval = PAPI_start( EventSet1 );
    if ( retval != PAPI_OK )
        test_fail( __FILE__, __LINE__, "PAPI_start", retval );

    if (!quiet) printf("Continuing\n");
#if defined(__FreeBSD__)
    if ( ptrace( PT_CONTINUE, pid, (caddr_t) 1, 0 ) == -1 ) {
#else
    if ( ptrace( PTRACE_CONT, pid, NULL, NULL ) == -1 ) {
#endif
      perror( "ptrace(PTRACE_CONT)" );
      return 1;
    }


    do {
      child = wait( &status );
      if (!quiet) printf( "Debugger exited wait() with %d\n", child);
      if (WIFSTOPPED( status ))
        {
          if (!quiet) printf( "Child has stopped due to signal %d (%s)\n",
              WSTOPSIG( status ), strsignal(WSTOPSIG( status )) );
        }
      if (WIFSIGNALED( status ))
        {
          if (!quiet) printf( "Child %ld received signal %d (%s)\n",
              (long)child,
              WTERMSIG(status) , strsignal(WTERMSIG( status )) );
        }
    } while (!WIFEXITED( status ));

    if (!quiet) printf("Child exited with value %d\n",WEXITSTATUS(status));
    if (WEXITSTATUS(status) != 0) {
      test_fail( __FILE__, __LINE__, "Exit status of child to attach to", PAPI_EMISC);
    }
    retval = PAPI_stop( EventSet1, values[0] );
    if ( retval != PAPI_OK )
      test_fail( __FILE__, __LINE__, "PAPI_stop", retval );

    elapsed_virt_us = PAPI_get_virt_usec(  ) - elapsed_virt_us;

    elapsed_virt_cyc = PAPI_get_virt_cyc(  ) - elapsed_virt_cyc;

    elapsed_us = PAPI_get_real_usec(  ) - elapsed_us;

    elapsed_cyc = PAPI_get_real_cyc(  ) - elapsed_cyc;

    retval = PAPI_cleanup_eventset(EventSet1);
    if (retval != PAPI_OK)
      test_fail( __FILE__, __LINE__, "PAPI_cleanup_eventset", retval );

    retval = PAPI_destroy_eventset(&EventSet1);
    if (retval != PAPI_OK)
      test_fail( __FILE__, __LINE__, "PAPI_destroy_eventset", retval );

    if (!quiet) {
    printf( "Test case: 3rd party attach start, stop.\n" );
    printf( "-----------------------------------------------\n" );
    tmp = PAPI_get_opt( PAPI_DEFDOM, NULL );
    printf( "Default domain is: %d (%s)\n", tmp, stringify_all_domains( tmp ) );
    tmp = PAPI_get_opt( PAPI_DEFGRN, NULL );
    printf( "Default granularity is: %d (%s)\n", tmp,
            stringify_granularity( tmp ) );
    printf( "Using %d iterations of c += a*b\n", NUM_FLOPS );
    printf( "-------------------------------------------------------------------------\n" );

    printf( "Test type    : \t           1\n" );

    printf( TAB1, "PAPI_TOT_CYC : \t", ( values[0] )[0] );
    printf( "%s : \t %12lld\n",event_name, ( values[0] )[1]);
    printf( TAB1, "Real usec    : \t", elapsed_us );
    printf( TAB1, "Real cycles  : \t", elapsed_cyc );
    printf( TAB1, "Virt usec    : \t", elapsed_virt_us );
    printf( TAB1, "Virt cycles  : \t", elapsed_virt_cyc );

    printf( "-------------------------------------------------------------------------\n" );

    printf( "Verification: none\n" );
    }

    test_pass( __FILE__ );

    return 0;

}

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wait_for_attach_and_loop()

static int wait_for_attach_and_loop ( void  )

static

Definition at line 41 of file attach2.c.

{
  char *path;
  char newpath[PATH_MAX];
  path = getenv("PATH");

  sprintf(newpath, "PATH=./:%s", (path)?path:"\0" );
  putenv(newpath);

  if (ptrace(PTRACE_TRACEME, 0, 0, 0) == 0) {
    execlp("attach_target","attach_target","100000000",NULL);
    perror("execl(attach_target) failed");
  }
  perror("PTRACE_TRACEME");
  return ( 1 );
}

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