btrace script

btrace.txt

/* BTrace Script Template */
import com.sun.btrace.annotations.*;
import static com.sun.btrace.BTraceUtils.*;
import java.lang.reflect.Field;

@BTrace
public class TracingScript {

	/*
	 * 获取方参数、返回值信息；获取方法调用时间
	 */
	@OnMethod(clazz="test.BtraceTest", method="add", location=@Location(Kind.RETURN))
	public static void func(@Self test.BtraceTest instance, int a, int b, @Return int result) {
	    println("调用堆栈");
	    jstack();
	    println(strcat("方法参数 A:", str(a)));
	    println(strcat("方法参数 B:", str(b)));
	    println(strcat("方法结果：", str(result)));
	}

	/*
	 * 正则表达式匹配获取调用方法名称以及类名称
	 */
    @OnMethod(clazz="/test\\..*/", method="/.*/")
    public static void m(@ProbeClassName String probeClass, @ProbeMethodName String probeMethod) {
        print(Strings.strcat("entered ", probeClass));
        println(Strings.strcat(".", probeMethod));
    }
    
    /*
	 * 获取类实例变量值
	 */
	@OnMethod(clazz = "test.BtraceTest", method = "/.*add/", location = @Location(value = Kind.ENTRY))  
    public static void bufferMonitor(@Self Object self) {  
        Field sumField = field("test.BtraceTest", "sum");  
        int sum = (Integer) get(sumField, self);  
        println(strcat("总和：", str(sum)));
    }
}