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| Re: Debugging java code invoked from a C++ application [message #242802 is a reply to message #242756] |
Thu, 12 April 2007 22:29   |
Eclipse User |
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Originally posted by: eclipse5.rizzoweb.com
Connie wrote:
> Hi,
>
> I have a C++ application that invokes Java code when the user performs a
> certain action. Is there a way for me to debug such java code? E.g. can
> I attach a jvm to jdt, just like attaching a process to C++ debugger
> when debugging jni code?
It is not clear what is happening. For example, how does C++ code invoke
Java code?
You can certainly attach the JDT debugger to any JVM, assuming you can
control the start-up parameters of that JVM to specify the appropriate
debug params (a JVM has to be started with specific params in order to
enable debug mode). The Eclipse Help has lots of information related to
this, which is called "Remote Debugging" (even when the JVM is on the
same machine).
But the question remains for you, how is the C++ app launching Java?
Hope this helps,
Eric
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| Re: Debugging java code invoked from a C++ application [message #242833 is a reply to message #242802] |
Fri, 13 April 2007 02:45 |
 Connie Lam
Messages: 24
Registered: July 2009 |
Junior Member |
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Eric Rizzo wrote:
> Connie wrote:
>> Hi,
>>
>> I have a C++ application that invokes Java code when the user performs a
>> certain action. Is there a way for me to debug such java code? E.g. can
>> I attach a jvm to jdt, just like attaching a process to C++ debugger
>> when debugging jni code?
> It is not clear what is happening. For example, how does C++ code invoke
> Java code?
> You can certainly attach the JDT debugger to any JVM, assuming you can
> control the start-up parameters of that JVM to specify the appropriate
> debug params (a JVM has to be started with specific params in order to
> enable debug mode). The Eclipse Help has lots of information related to
> this, which is called "Remote Debugging" (even when the JVM is on the
> same machine).
> But the question remains for you, how is the C++ app launching Java?
> Hope this helps,
> Eric
Thanks Eric for your help! I am now able to debug my Java code!
I started a JVM in my C++ code by specifying the necessary class paths,
and used CallStaticVoidMethod to make a call to the Java code. I also
added the following lines to my C++ code to enable debug mode:
options[3].optionString = "-Xdebug";
options[4].optionString =
" -Xrunjdwp:transport=dt_socket,address=8000,server=y,suspend= n ";
Then I created a remote launch configuration, specified localhost as the
host and 8000 as the port, and ran it in debug mode.
Connie
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