FULL PRODUCT VERSION :
java version " 1.7.0_25 "
Java(TM) SE Runtime Environment (build 1.7.0_25-b17)
Java HotSpot(TM) 64-Bit Server VM (build 23.25-b01, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Windows 7 64-bit

A DESCRIPTION OF THE PROBLEM :
Overflow in method long getObjectSize(Object objectToSize) from java.lang.instrument.Instrumentation

instrumentation.getObjectSize(new int[600_000_000]) returns -1894967280 (negative value)

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
java.exe -Xmx4000m -javaagent:object_size_test.jar -jar object_size_test.jar

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
2400000016
ACTUAL -
-1894967280

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
import java.lang.instrument.Instrumentation;

public class ObjectSizeTest {

private static Instrumentation instrumentation;

public static void premain(String options, Instrumentation instrumentation) {
ObjectSizeTest.instrumentation = instrumentation;
}

public static void main(String[] args) {
int[] a = new int[1000_000_000];
System.out.println(instrumentation.getObjectSize(a));
}
}
---------- END SOURCE ----------