Package edu.fiu.adwise.homomorphic_encryption.misc

Class InstrumentationAgent

java.lang.Object

edu.fiu.adwise.homomorphic_encryption.misc.InstrumentationAgent

public class InstrumentationAgent
extends Object

This class serves as a Java instrumentation agent, allowing the measurement of object sizes at runtime. It uses the Instrumentation API to provide functionality for determining the size of objects in memory.

To use this agent, it must be specified as a Java agent in the JVM arguments. The premain method is invoked before the application's main method, initializing the instrumentation instance.

For more details, refer to: Baeldung: Measuring Object Size in Java

Constructor Summary

Constructors

Constructor	Description
InstrumentationAgent()

Method Summary

Modifier and Type	Method	Description
static long	getObjectSize(Object object)	Returns the size of the specified object in bytes.
static void	premain(String agentArgs, Instrumentation inst)	The premain method is called by the JVM before the application's main method.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

InstrumentationAgent

public InstrumentationAgent()

Method Details

premain

public static void premain(String agentArgs,
 Instrumentation inst)

The premain method is called by the JVM before the application's main method. It initializes the Instrumentation instance for use in the agent.

Parameters:

agentArgs - The agent arguments passed to the JVM.

inst - The Instrumentation instance provided by the JVM.

getObjectSize

public static long getObjectSize(Object object)

Returns the size of the specified object in bytes.

Parameters:

object - The object whose size is to be measured.

Returns:

The size of the object in bytes.

Throws:

IllegalStateException - If the agent has not been initialized.