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From "Yu-Nan He (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-1898) write barrier for C/C++ based GCs in Jitrino.OPT
Date Wed, 18 Oct 2006 03:17:35 GMT
write barrier for C/C++ based GCs in Jitrino.OPT
------------------------------------------------

                 Key: HARMONY-1898
                 URL: http://issues.apache.org/jira/browse/HARMONY-1898
             Project: Harmony
          Issue Type: Improvement
          Components: DRLVM
         Environment: Windows and Linux, IA32
            Reporter: Yu-Nan He
         Attachments: WB4C_OPT.patch

Attached patch is an implementation of write barrier for C/C++ based GCs in Jitrino.OPT. The
patch lets OPT to call "gc_requires_barriers()" of GC to determine if it needs to insert the
write barrier code into the jitted code, so it doesn't impact current DRLVM/GC at all.  It
calls gc_heap_slot_write_ref( ) of GC module.

To Apply this patch, please enter vm/ directory and patch it. You can pass '-Xem:opt' to EM
to use the OPT-only mode. In any other modes, you should be sure to open the JET write barrier
for C/C++ based GCs .

This patch is based on revision 465123.

Please review this patch and see if it's ready for commission. Thanks. We hope it can be committed
to Harmony soon.


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