[JBoss-user] [Javassist user questions] - Re: Why is there no LocalVarAccess just like FieldAccess Exp
Thank you Mr. Chiba for your response. I have another question which is almost the same as my previous question. Why is there no Expr class for logical-expressions, arithmetic-expressions, and things like them? I want to analyse a code-line (as a Abstract Syntax Tree) to see what kind expressions a given code-line contains. I can now know whether an expression is a method-call, new, cast, instanceOf, fieldAccess, but not if it's a logical-expression, using the high-level API. I think, I can use the low-level API to realise that kind of analysis. Am I right? Is it valuable to make high-level API for that kind expressions? I appriciate very much your valuable responses. Thanks View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=3869399#3869399 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=3869399 --- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click ___ JBoss-user mailing list JBoss-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] [Javassist user questions] - Why is there no LocalVarAccess just like FieldAccess Expr?
Hi, I use javassist Expr classes (for example FieldAccess) to construct a model of the running java class. It would be very fine if there was a javassist LocalVarAccess (just like FieldAccess) in order to get information about the local-variables of a method (and hence about the behavior of the method). Is this absence intentional? Is it feasible that I can make it using the javassist Expr class or should you I use the javassist low level API? Thanks in advance With kindly regards Reza View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=3868818#3868818 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=3868818 --- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click ___ JBoss-user mailing list JBoss-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] [Javassist user questions] - Has somebody used javassist to perform Data Flow Analysis?
Hello there, I'm looking for pice of code which uses javassist to perform Data Flow Analysis on Java Byte Code. I want to use that for an academic project relating self-management (self-healing). If nobody has such a code I want to write it by myself. But the question is whether it is feasible to use javassist to write a Data Flow Analysis on java byte-code? Thanks in advance View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=3867452#3867452 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=3867452 --- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click ___ JBoss-user mailing list JBoss-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] [Javassist user questions] - Re: Can I get info about containing object of some methodCal
Hi, Thank you for your response. But it doesn't solve my problem. As you can see from my previous mailing, I have already used ExprEditor to get information about "someMethod" in the following method-call expression: .. someObj.someMethod .. But I need information about "someObj". I need just static information like the name of "someObj", it type (class), ... . The question is: How can I get such static information about "someObj" using javassist? Thanks. View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=3866891#3866891 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=3866891 --- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click ___ JBoss-user mailing list JBoss-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] [Javassist user questions] - Re: Can I get info about containing object of some methodCal
You are absolutely right. I want actually static information about "someObj", like object-type, ... . Would you please tell me how I can get this information? Thanks View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=3865685#3865685 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=3865685 --- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click ___ JBoss-user mailing list JBoss-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] [Javassist user questions] - Can javassist make a CtClass from a serialized object?
I'm sorry if this question has already been asked. I need at runtime to serialize a running object (I have to keep the state of the object) and make a CtClass from the serialized object and make some changes to it and load the new modified class. Is this possible with javassist? Thanks in advance View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=3859737#3859737 Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&p=3859737 --- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/ ___ JBoss-user mailing list JBoss-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jboss-user
[JBoss-user] [Javassist user questions] - Can I get info about containing object of some methodCall?
Hello,
Suppose I have the following MethodCall expr:
..
someObj.someMethod
..
If I use:
curMethod.instrument(new ExprEditor()
public void edit(MethodCall m) throws CannotCompileException {
...
then I can get information about the methodCall "someMethod". For analysis
purposes I will also get information about "someObj", that the method is a
method of the object "someObj". Is it possible to get such information using
ExprEditor? Or I should get in another way and how?
Thanks in advance
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[JBoss-user] [Javassist user questions] - Re: addCatch doesn't work
Thank you very, chiba for your response. I used {return;} and it works. But if
there are methods with non-void return types then {return;} is not enough.
Therefore I used (within my addCatch) {Object result; return ($r)result;}. But
I get the following javassist compiler error:
==
javassist.CannotCompileException: [source error] no such class: $r
at javassist.CtBehavior.addCatch(CtBehavior.java:722)
at javassist.CtBehavior.addCatch(CtBehavior.java:670)
==
It seems that the javassist compiler doesn't recognize $r. Is it not allowed to
use $r in the addCatch? Or do I do something wrong?
Thanks in advance
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[JBoss-user] [Javassist user questions] - addCatch doesn't work
I used addCatch as follows:
=
for (int i = 0; i < allMethods.length; i++) {
CtMethod method = allMethods;
if (method.getName().startsWith("set")) {
StringBuffer insCode = new StringBuffer();
insCode.append('{');
//insCode.append("System.out.println($e);");
//insCode.append("System.out.println(\"\");");
//insCode.append("java.lang.StackTraceElement[]
ste = $e.getStackTrace();");
//insCode.append("System.out.println(ste[0].getLineNumber());");
//insCode.append("System.out.println($e.getMessage());");
//insCode.append("System.out.println(\"\");");
insCode.append('}');
method.addCatch(insCode.toString(), expClass);
}
}
==
When I look at the decompiled (by JAD) class-file, I see the instrumentation is
done perfectly. But If I want to run the instrumented class-file I get the
following error-msg from JVM:
java.lang.VerifyError: (class: nl/vu/cs/iids/MyPoint, method: setRectangular
signature: (DD)V) Falling off the end of the code
==
MyPoint is an example class with a number of set-methods. (It is the example
class which is shiped by AspectJ).
I have tried also with the javassist 2.6. But I got the same problem.
Thanks
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[JBoss-user] [Javassist user questions] - Re: javassist-3.0RC1: replace("{}") doesn't work.
I'm sorry. I don't understand your answer. I try to say that replace("{}")
doesn't work with javassist-3.0RC1. Which release should I use?
Thanks.
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[JBoss-user] [Javassist user questions] - javassist-3.0RC1: replace(
Hello,
I have tried the following code, based on the tutorial:
=
public class Test {
public static void main(String[] args) throws Exception {
ClassPool pool = ClassPool.getDefault();
pool.insertClassPath("some-path");
CtClass cc = pool.get("nl.vu.cs.iids.MyPoint");
CtMethod sMethod = cc.getDeclaredMethod("setTest1");
sMethod.instrument(new ExprEditor() {
public void edit(MethodCall m) throws
CannotCompileException {
System.out.println("> " + m.getMethodName() +
" line: " + m.getLineNumber());
m.replace("{}");
//m.replace("{ $1 = 0; newX = $1 + 50.2; $_ =
$proceed($$); System.out.println(\"This is added line.\"); }");
}
});
}
}
===
when I run the program I get the following error:
> toString line: 28
javassist.CannotCompileException: the resulting value is not stored in $_
at javassist.expr.Expr.checkResultValue(Expr.java:170)
at javassist.expr.MethodCall.replace(MethodCall.java:209)
at nl.vu.cs.iids.Test$1.edit(Test.java:32)
at javassist.expr.ExprEditor.doit(ExprEditor.java:118)
at javassist.CtBehavior.instrument(CtBehavior.java:362)
at nl.vu.cs.iids.Test.main(Test.java:29)
Exception in thread "main"
===
As I know, when we want to remove a method-call expression we can just give the
"{}" source text to the replace method. Am I right?
Thanks in advance
Reza
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