sio2box

A sandbox that tracks JVM memory allocation, and will throw an exception when a limit is reached.

Tracks

• Array.newInstance
• type[].clone
• Object instantiation
• new type[] - ANEWARRAY, NEWARRAY, MULTIANEWARRAY
• Object.clone
• ArrayList.clone (TODO)

Doesn't track any local primitive allocations.

Compiling

cd sio2box
mvn install

Usage

java
-javaagent:sio2box.jar
-Xbootclasspath/a:sio2box.jar
...

Pass through a MemoryStore object as the first argument (this is a convention).

MemoryStore memoryStore = new MemoryStore(maxMemory);
myMethod(memoryStore, arg0, arg1);

Annotate the class and method:

@SiO2Class
public class MyClass {

  @SiO2Method
  public void myMethod(MemoryStore m, String arg0, Object arg1) {
      ...
  }
}

If more memory is allocated than you specify, a MemoryExceededException exception is thrown.