Java运行时追踪工具

BTrace is a safe, dynamic tracing tool for the Java platform. 
BTrace can be used to dynamically trace a running Java program 
(similar to DTrace for OpenSolaris applications and OS). 
BTrace dynamically instruments the classes of the target application to inject tracing code ("bytecode tracing")


https://github.com/btraceio/btrace


可以拦截方法 输入参数和返回值获取 方法执行时间


使用 btrace 1.3.11.3 版本

例子程序
带参数的静态方法
无参数的静态方法
实例方法



import java.util.Date;
import java.util.Random;

public class Hello {

	private static final Random rand = new Random();

	public static void main(String[] args) throws Exception {
		System.out.println("hello");
		Hello hello = new Hello();
		while (true) {

			method1(System.currentTimeMillis());
			method2();
			hello.method3();
		}
	}

	private static int method1(long time) throws Exception {
		int tmp = rand.nextInt(1000);
		Thread.sleep(tmp);
		System.out.println("method1," + tmp + "," + new Date(time));
		return tmp;
	}

	private static int method2() throws Exception {
		int tmp = rand.nextInt(1000);
		Thread.sleep(tmp);
		System.out.println("method2," + tmp + "," + new Date());
		return tmp;
	}

	private int method3() throws Exception {
		int tmp = rand.nextInt(1000);
		Thread.sleep(tmp);
		System.out.println("method3," + tmp + "," + new Date());
		return tmp;
	}

}



测试脚本


import com.sun.btrace.BTraceUtils;
import com.sun.btrace.annotations.BTrace;
import com.sun.btrace.annotations.Duration;
import com.sun.btrace.annotations.Kind;
import com.sun.btrace.annotations.Location;
import com.sun.btrace.annotations.OnMethod;
import com.sun.btrace.annotations.ProbeClassName;
import com.sun.btrace.annotations.ProbeMethodName;
import com.sun.btrace.annotations.Return;

@BTrace
public class Script1 {

	@OnMethod(clazz = "dyyx.Hello", method = "method1", location = @Location(Kind.RETURN) )
	public static void method1(long param1,@ProbeClassName String probeClassName, @ProbeMethodName String probeMethod,
			@Duration long duration,@Return int result) {
		BTraceUtils.println(probeClassName + "." + probeMethod + ",cost time:" + duration / 1000000 + " ms"+",param1="+param1+",result="+result);
	}

	@OnMethod(clazz = "dyyx.Hello", method = "method2", location = @Location(Kind.RETURN) )
	public static void method2(@ProbeClassName String probeClassName, @ProbeMethodName String probeMethod,
			@Duration long duration) {
		BTraceUtils.println(probeClassName + "." + probeMethod + ",cost time:" + duration / 1000000 + " ms");
	}

	@OnMethod(clazz = "dyyx.Hello", method = "method3", location = @Location(Kind.RETURN) )
	public static void method3(@ProbeClassName String probeClassName, @ProbeMethodName String probeMethod,
			@Duration long duration) {
		BTraceUtils.println(probeClassName + "." + probeMethod + ",cost time:" + duration / 1000000 + " ms");
	}

}




简单使用 
/Users/dugang/soft/btrace/btrace-bin-1.3.11.3/bin
先编译下
./btracec Script1.java
获取需要调试的Java进程id
ps aux|grep Hello
执行脚本
./btrace PID Script1.java -v

需要 加 -v ,否则控制台无输出