VisualVM初次使用BTrace功能方法步骤

 1 /**
 2  * 
 3  */
 4 /**
 5  * @author Administrator
 6  *
 7  */
 8 package com.lyq.demo;
 9 
10 import java.io.BufferedReader;
11 import java.io.IOException;
12 import java.io.InputStreamReader;
13 
14 public class BTraceTest{
15     
16     public int  add(int a, int b) {
17         return a+b;
18     }
19     
20     public static void main(String[] argStrings) throws IOException{
21         
22         BTraceTest bTraceTest = new BTraceTest();
23         BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
24         
25         for(int i=0; i<10; ++i){
26             reader.readLine();
27             int a = (int)Math.round(Math.random()*1000);
28             int b = (int)Math.round(Math.random()*1000);
29             System.out.println(bTraceTest.add(a, b));
30         }
31         
32     }
33 }

 1 /* BTrace Script Template */
 2 import com.sun.btrace.annotations.*;
 3 import static com.sun.btrace.BTraceUtils.*;
 4 
 5 @BTrace
 6 public class TracingScript {
 7     /* put your code here */
 8     @OnMethod(
 9         clazz="com.lyq.demo.BTraceTest",
10         method="add",
11         location=@Location(Kind.RETURN)
12     )
13     public static void func(@Self com.lyq.demo.BTraceTest instance, int a, int b, @Return int result)
14     {
15         println("调用堆栈:");
16         jstack();
17         println(strcat("方法参数A: ",str(a)));
18         println(strcat("方法参数B: ",str(b)));
19         println(strcat("方法结果: ",str(result)));
20     }
21     
22 }