Re: Question for using ASM to log the method invocation trace.

Say you have a class:
class Tracer {
public static void trace(String )

public static void close()
}

Then you can happily insert the calls to Tracer.trace for the instrumenting. You can also right at the beginning of the program (before you instrument anything and when you set-up the FileWriter to begin with) set-up a shutdown hook using something like:

Runtime.getRuntime().addShutdownHook(new Thread() {
  public void run() {
    Tracer.close();
}});

Its not a concern of the tracing to get the file stream closed, it is for the shutdown of the program.

PK



________________________________
From: Zhongxian Gu <[email protected]>
To: [email protected]
Sent: Wed, 30 June, 2010 5:10:33
Subject: [asm] Question for using ASM to log the method invocation trace.

Hi all,

I wish to use ASM to instrument the code and during the run, record the method invocation trace. I use AdviceAdapter to do that. To enhance the performance,
I use BufferedWriter to print info to the log file. The problem is that I don't know how to instrument the code to close the BufferedWriter. I must call it until all the 
methods called which is only known at run-time. Without calling close method will cause information missing in the buffer. 

I wonder if some of you have also experienced this condition and could you give me some hints. Thanks

Best

Zhongxian

-- 
Zhongxian Gu
http://wwwcsif.cs.ucdavis.edu/~gu/
Ph.D. Student in Computer Science, UC Davis
2249 Kemper Hall

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