Package javassist.bytecode.analysis

package javassist.bytecode.analysis
Bytecode Analysis API.

This package provides an API for performing data-flow analysis on a method's bytecode. This allows the user to determine the type state of the stack and local variable table at the start of every instruction. In addition this API can be used to validate bytecode, find dead bytecode, and identify unnecessary checkcasts. Look at ControlFlow class first for details.

The users of this package must know the specifications of class file and Java bytecode. For more details, read this book:

  • Tim Lindholm and Frank Yellin, "The Java Virtual Machine Specification 2nd Ed.", Addison-Wesley, 1999.
  • Classes
    Class
    Description
    Analyzer
    A data-flow analyzer that determines the type state of the stack and local variable table at every reachable instruction in a method.
    ControlFlow
    Represents the control flow graph of a given method.
    ControlFlow.Block
    Basic block.
    ControlFlow.Catcher
    Represents a catch clause.
    ControlFlow.Node
    A node of (post) dominator trees.
    Executor
    Executor is responsible for modeling the effects of a JVM instruction on a frame.
    Frame
    Represents the stack frame and local variable table at a particular point in time.
    FramePrinter
    A utility class for printing a merged view of the frame state and the instructions of a method.
    MultiArrayType
    Represents an array of MultiType instances.
    MultiType
    MultiType represents an unresolved type.
    Subroutine
    Represents a nested method subroutine (marked by JSR and RET).
    SubroutineScanner
    Discovers the subroutines in a method, and tracks all callers.
    Type
    Represents a JVM type in data-flow analysis.
    Util
    A set of common utility methods.