Javaagentの開発にJavaInstrumentationとASMByteCodeLibraryを使用しています。メソッドによってスローされたランタイム例外を取得するにはどうすればよいですか?
コードを添付しました。ここでは、メソッドが正常に終了するか、例外をスローするかを取得しています。ただし、例外を取得できません。例外を取得する方法は?
package com.abc.agent.servlet;
import org.objectweb.asm.Label;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.Type;
import com.abc.agent.matcher.HttpServletMethodMatcher;
public class AbcServletMethodVisitorAdapter extends MethodVisitor {
private String methodName;
private String className;
private String description;
private boolean doMethodMatch;
private int opcode = -1;
public AbcServletMethodVisitorAdapter(MethodVisitor mv , String methodName , String description , String className) {
super(Opcodes.ASM4, mv);
this.methodName = methodName;
this.className = className;
this.description = description;
this.doMethodMatch = false;
}
public void visitCode() {
super.visitCode();
if(methodName.equals("<clinit>") || methodName.equals("<init>"))
return;
HttpServletMethodMatcher httpServletMethodMatcher = new HttpServletMethodMatcher(className , methodName , description);
this.doMethodMatch = httpServletMethodMatcher.isHttpServletMatch();
if(this.doMethodMatch){
mv.visitVarInsn(Opcodes.ALOAD, 0);
mv.visitVarInsn(Opcodes.ALOAD, 1);
mv.visitLdcInsn(this.className);
mv.visitLdcInsn(this.methodName);
mv.visitLdcInsn(this.description);
mv.visitMethodInsn(Opcodes.INVOKESTATIC, "com/abc/agent/trace/RootTracer", "httpServletDoMethodBegin", "(Ljava/lang/Object;Ljavax/servlet/http/HttpServletRequest;Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V");
mv.visitCode();
}
else // Other Methods defined in the HttpServlet...
{
mv.visitLdcInsn(this.className);
mv.visitLdcInsn(this.methodName);
mv.visitLdcInsn(this.description);
mv.visitMethodInsn(Opcodes.INVOKESTATIC, "com/abc/agent/trace/RootTracer", "httpServletOtherMethodBegin", "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V");
mv.visitCode();
}
}
public void visitMaxs(int maxStack, int maxLocals) {
super.visitMaxs(maxStack + 4, maxLocals);
}
public void visitInsn(int opcode) {
if(methodName.equals("<clinit>") || methodName.equals("<init>")){
// Do nothing....
}
else{
if ((opcode >= Opcodes.IRETURN && opcode <= Opcodes.RETURN) || opcode == Opcodes.ATHROW) {
this.opcode = opcode;
mv.visitLdcInsn(this.className);
mv.visitLdcInsn(this.methodName);
mv.visitLdcInsn(this.description);
mv.visitLdcInsn(this.opcode);
if(this.doMethodMatch) {
mv.visitMethodInsn(Opcodes.INVOKESTATIC, "com/abc/agent/trace/RootTracer", "httpServletDoMethodEnd", "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;I)V");
}
else{
mv.visitMethodInsn(Opcodes.INVOKESTATIC, "com/abc/agent/trace/RootTracer", "httpServletOtherMethodEnd", "(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;I)V");
}
}
}
mv.visitInsn(opcode);
}
}