com.github.marschall.objectsize.JvmtiObjectSizeCalculator Maven / Gradle / Ivy
package com.github.marschall.objectsize;
final class JvmtiObjectSizeCalculator implements ObjectSizeCalculator {
@Override
public long getObjectSize(Object o) {
if (o == null) {
return 0L;
}
long size = getObjectSize0(o, RuntimeException.class);
if (size == -1L) {
// we should not reach here, JNI code should have thrown an exception
throw new RuntimeException("calculation failed");
}
return size;
}
private static native long getObjectSize0(Object o, Class exceptionClass);
static boolean isSupported() {
return isSupported0();
}
private static native boolean isSupported0();
}