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/* 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");
}
}
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