Subversion Repositories openrisc

/* This test checks for two slightly different overflow scenarios in

 * array allocation.

 *

 * The first is that the number of bytes needed for an array size

 * overflows on a 32 bit machine.

 *

 * The second is that on a 64 machine, the number of bytes silently

 * gets truncated, resulting in too small an object being

 * allocated.  */

class newarray_overflow

{

  static boolean failed = false;

  static void int_check()

  {

    int[] x;

    try

      {

        x = new int [1 << 30];

      }

    catch (OutOfMemoryError e)

      {

        return;

      }

    /* If we really get away with it (64 bit machine), that's cool.  */

    if (x == null) {

      System.err.println ("int check: new returned null.");

      failed = true;

      return;

    }

    try

      {

        // Only check a few places so we don't thrash too badly.

        for (int i = 0; i < x.length; i += (1 << 24))

          if (x[i] != 0)

            failed = true;

      }

    catch (Throwable e)

      {

        System.err.print ("int check: ");

        System.err.println (e);

        failed = true;

      }

  }

  static void object_check()

  {

    Object[] x;

    try

      {

        x = new Object [1 << 30];

        System.err.println ("Alloc succeeded.");

        System.err.println (x);

      }

    catch (OutOfMemoryError e)

      {

        return;

      }

    /* If we really get away with it (64 bit machine), that's cool.  */

    if (x == null) {

      System.err.println ("Object check: new returned null.");

      failed = true;

      return;

    }

    try

      {

        for (int i = 0; i < x.length; i += (1 << 24))

          if (x[i] != null)

            failed = true;

      }

    catch (Throwable e)

      {

        System.err.print ("Object check: ");

        System.err.println (e);

        failed = true;

      }

  }

  public static void main (String[] ignore)

  {

    int_check();

    object_check();

    if (!failed)

      System.out.println ("ok");

  }

}