com.github.houbb.java.callgraph.ex.stat

类 DynamicCallManager

java.lang.Object

com.github.houbb.java.callgraph.ex.stat.DynamicCallManager

public class DynamicCallManager
extends Object

DynamicCallManager provides facilities to retrieve information about dynamic calls statically.

Most of the time, call relationships are explicit, which allows to properly build the call graph statically. But in the case of dynamic linking, i.e. invokedynamic instructions, this relationship might be unknown until the code is actually executed. Indeed, bootstrap methods are used to dynamically link the code at first call. One can read details about the invokedynamic instruction to know more about this mechanism.

Nested lambdas are particularly subject to such absence of concrete caller, which lead us to produce method names like lambda$null$0, which breaks the call graph. This information can however be retrieved statically through the code of the bootstrap method called.

In retrieveCalls(Method, JavaClass), we retrieve the (called, caller) relationships by analyzing the code of the caller Method. This information is then used in linkCalls(Method) to rename the called Method properly.

作者:

Matthieu Vergne

构造器概要

构造器

构造器和说明
DynamicCallManager()

方法概要

限定符和类型	方法和说明
void	linkCalls(org.apache.bcel.classfile.Method method) Link the Method's name to its concrete caller if required.
void	retrieveCalls(org.apache.bcel.classfile.Method method, org.apache.bcel.classfile.JavaClass jc) Retrieve dynamic call relationships based on the code of the provided Method.

从类继承的方法 java.lang.Object

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

构造器详细资料

DynamicCallManager

public DynamicCallManager()

方法详细资料

retrieveCalls

public void retrieveCalls(org.apache.bcel.classfile.Method method,
                          org.apache.bcel.classfile.JavaClass jc)

Retrieve dynamic call relationships based on the code of the provided Method.

参数:

method - Method to analyze the code

jc - JavaClass info, which contains the bootstrap methods

另请参阅:

linkCalls(Method)

linkCalls

public void linkCalls(org.apache.bcel.classfile.Method method)

Link the Method's name to its concrete caller if required.

参数:

method - Method to analyze

另请参阅:

retrieveCalls(Method, JavaClass)