The Java debugger's evaluation support is performed by interpretting an
expression and sending JDI commands over the socket to the target VM. We
basically parse the expression in to an AST, and then visit the AST to
interpret the expression. At various times we need to resolve class
objects - for example when referencing a static field, sending a static
message, etc. To do this, we look up the class by name. We use the method:
public static Class forName(String name, boolean initialize,
ClassLoader loader)
If this method is not in the J2ME libraries, the evaluation will fail
(currently). Is there an equivalent method we could use for J2ME?
Darin Wright
"Zhuohui Qiu" <zqiu@xxxxxxx>
Sent by: platform-debug-dev-bounces@xxxxxxxxxxx
10/16/2007 05:33 PM
Please respond to
"Eclipse Platform Debug component developers list."
<platform-debug-dev@xxxxxxxxxxx>
To
<platform-debug-dev@xxxxxxxxxxx>
cc
Subject
[platform-debug-dev] A j2me debug problem
Hey,
Our plug-in is supposed to work with our simulator which is running in
j2me. For some reason, Eclipse can not execute expression evaluation
properly
on the project running on our simulator (we have a debugger running on the
simulator and it talks to the eclipse debugger). It seems the reason is
eclipse is
running in J2SDK environment and our simulator is running in J2ME
environment,
there is some problem in the communication.
I did some debug to find out the reason and have found that eclipse
debugger
has some problem when it tries to get the IJAvaType of an object, e.g.
java.lang.Class.
In the Eclipse's implementation of com.sun.jdi.ReferenceType class,
eclipse tries
to use the methodsByName() method to find the object type; the passed in
selector
is “forName”, and the signature is
“(Ljava/lang/String;ZLjava/lang/ClassLoader;)Ljava/lang/Class;”.
The problem is that the signature of “forName” item in the visible methods
list of
ReferenceTypeImpl of eclipse is “()Ljava/lang/Class;”, thus, eclipse
throws an
exception that it can not find the class type.
It seems that J2ME does not support reflection but exlipse expression
evaluator is
asking for that information. So, the question could be how does eclipse do
expression
evaluation with J2ME?
I tried to install the DSF-SDK and mtj-sdk, but the problem is still
there. Can anyone tell me what I should do?
Thanks.
Raymond
---------------------------------------------------------------------
This transmission (including any attachments) may contain confidential
information, privileged material (including material protected by the
solicitor-client or other applicable privileges), or constitute non-public
information. Any use of this information by anyone other than the intended
recipient is prohibited. If you have received this transmission in error,
please immediately reply to the sender and delete this information from
your system. Use, dissemination, distribution, or reproduction of this
transmission by unintended recipients is not authorized and may be
unlawful. _______________________________________________
platform-debug-dev mailing list
platform-debug-dev@xxxxxxxxxxx
https://dev.eclipse.org/mailman/listinfo/platform-debug-dev
------------------------------------------------------------------------
_______________________________________________
platform-debug-dev mailing list
platform-debug-dev@xxxxxxxxxxx
https://dev.eclipse.org/mailman/listinfo/platform-debug-dev