RFR (S): add CodeComments functionality to assember stubs

[Christian Thalinger]

On Sep 19, 2012, at 5:20 AM, "Lindenmaier, Goetz" <goetz.lindenmaier at sap.com> wrote:

> Hi,
>  
> The Assembler and CodeBuffer classes supply CodeComment / block_comment()
> functionality, which does not work with stubs. The comments are
> not printed with +PrintStubCode or +PrintInterpreter because the
> comments are lost when the code is turned into a Stub, while
> they are kept if the code is copied to a CodeBlob.
>  
> We fixed this in our SAP JVM, and contributed the change to the
> ppc-aix-port some while ago, see
> http://hg.openjdk.java.net/ppc-aix-port/jdk7u/hotspot/rev/d65d0876ab43.
>  
> I propose to add this fix to the OpenJDK mainline.
> A webrev can be found here:
> http://cr.openjdk.java.net/~goetz/webrevs/webrev-comments_in_stubs/
>  
> Basically the change passes the codeBuffer to the Stub 
> constructor, and adapts the disassembler to print the
> comments.
> In the debug build the  InterpreterCodelet Stub has a new field
> holding the code comments.
>  
> I also added some ttyLocks and \\ns to beautify the output.

+      tty->print("\n");

Can you replace these with:

+      tty->cr();

Otherwise this looks good and we should integrate it.  Thanks for contributing!

-- Chris

>  
> Could somebody please create a bug id for this issue and review the changes?
>  
> Thank you and best regards,
>   Goetz