compiled method info

[Christian Thalinger]

On May 3, 2012, at 1:20 PM, Xin Tong wrote:

> On Thu, May 3, 2012 at 4:13 PM, Christian Thalinger
> <christian.thalinger at oracle.com> wrote:
>> 
>> On May 3, 2012, at 11:54 AM, Xin Tong wrote:
>> 
>>> I am new to hotspot JVM. I am wondering how can I get a log of all the
>>> method compiled
>> 
>> You can print the compiled methods with -XX:+PrintCompilation.
> 
> This will print the compiled method to the stdout, is there a way to
> force it to some output file ?

Check globals.hpp for LogCompilation (and all other sorts of switches).

>> 
>>> and how can i get the intermediate representation
>> 
>> This is more complicated.  Do you mean the graph that's produced during the compile?
>> 
>>> and
>>> optimizations performed on one particular method ?
> 
> Yes. I used to work on some other compiler framework in which one is
> able to print the graph after every optimization.

IGV is what you are looking for:

http://ssw.jku.at/General/Staff/TW/igv.html

> 
>> 
>> Depends on the compiler used.  You might get an idea what's going on using -XX:+TimeCompiler (this is only available in a non-product build).
>> 
> 
> I used make all  to build openJDK. however, all the developer options
> are not available. How do i make a non-product build. I do not want a
> debug build, as debug build tend to run slower than prod build.

A fastdebug build is probably what you want.

-- Chris

> 
> 
> -- Xin
> 
>> -- Chris
>> 
>>> 
>>> Thanks
>>> 
>>> Xin
>>