kanela.agent.util.asm

Class ClassWriterFlags

java.lang.Object

kanela.agent.util.asm.ClassWriterFlags

public class ClassWriterFlags
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
ClassWriterFlags()

Method Summary

Modifier and Type	Method and Description
static int	resolve(net.bytebuddy.description.type.TypeDescription typeDescription, java.lang.ClassLoader classLoader) In versions of the JVM > 1.5 the classes bytecode contain a stack map along with the method code.

Methods inherited from class java.lang.Object

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

Constructor Detail

ClassWriterFlags

public ClassWriterFlags()

Method Detail

resolve

public static int resolve(net.bytebuddy.description.type.TypeDescription typeDescription,
                          java.lang.ClassLoader classLoader)

In versions of the JVM > 1.5 the classes bytecode contain a stack map along with the method code. This map describes the layout of the stack at key points (jump targets) during the method's execution. In previous versions(JVM < 1.5 bytecode), the JVM would have to compute this information, which is computationally expensive. By requiring this information, the JVM can just verify that the frames work, which is significantly easier than recalculating everything. So if JVM < 1.5 ClassWriter.COMPUTE_MAXS otherwise ClassWriter.COMPUTE_FRAME(computeFrames implies computeMaxs).