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From "weldon washburn (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HARMONY-1428) [DRLVM] first batch of files for GCv5, a trace-forward copying collector
Date Sat, 07 Oct 2006 04:24:21 GMT
    [ http://issues.apache.org/jira/browse/HARMONY-1428?page=comments#action_12440641 ] 
            
weldon washburn commented on HARMONY-1428:
------------------------------------------

Build problems when using the current svn HEAD:

1)
the APR header include path does not match up properly.  I put an echo statement in gc.xml:

        <echo> Using location=${extra.apr.includes}</echo>

and got:

         [echo]  Using location=C:\t_harmony\drlvm\trunk\build\win_ia32_msvc_debug\semis\extra\apr\include\apr-1

I fixed it by changing gc_platform.h:

///////////////// wjw #include <apr-1/apr_time.h>
///////////////// wjw #include <apr-1/apr_atomic.h>
#include <apr_time.h>
#include <apr_atomic.h>

2) 
there seems to be a problem with the threading headers ???  I get the following error messages:


build.native.cpp:
       [cc] 18 total files to be compiled.
       [cc] cl : Command line warning D4025 : overriding '/Ox' with '/Od'
       [cc] verify_live_heap.cpp
       [cc] fspace_alloc.cpp
       [cc] c:\t_harmony\drlvm\trunk\vm\gc\src\trace_forward\../thread\thread_al
loc.h(32) : error C2146: syntax error : missing ';' before identifier 'thread_ha
ndle'
       [cc] c:\t_harmony\drlvm\trunk\vm\gc\src\trace_forward\../thread\thread_al
loc.h(32) : error C2501: 'Alloc_Context::VmThreadHandle' : missing storage-class
 or type specifiers
       [cc] c:\t_harmony\drlvm\trunk\vm\gc\src\trace_forward\../thread\thread_al
loc.h(32) : error C2501: 'Alloc_Context::thread_handle' : missing storage-class
or type specifiers
       [cc] mspace.cpp
       [cc] c:\t_harmony\drlvm\trunk\vm\gc\src\mark_compact\../thread\thread_all
oc.h(32) : error C2146: syntax error : missing ';' before identifier 'thread_han
dle'

--------------------->   and another approximately 50 or 60 compiler error messages 




> [DRLVM] first batch of files for GCv5, a trace-forward copying collector
> ------------------------------------------------------------------------
>
>                 Key: HARMONY-1428
>                 URL: http://issues.apache.org/jira/browse/HARMONY-1428
>             Project: Harmony
>          Issue Type: Improvement
>          Components: DRLVM
>         Environment: These files were only tested on Windows with VS.NET 2003.  
>            Reporter: Xiao-Feng Li
>         Assigned To: weldon washburn
>         Attachments: gc.xml, gc_v5.001.zip, GCv5-mc001.zip, gcv5-r0.10.zip, patch-for-GCv5_r0.10.txt
>
>
> This archive has a couple of files implementing an early version of a trace-forward copying
collector for GCv5. It's only a starter with very basic functionalities. It is a generational
GC reqiures write barrier implemented in JIT. It was tested with JET, and ran SPECJBB2000
and SPECJVM98.
> The algorithm is depth-first tracing of From-space, and forwarding live objects to To-space
(It can forward part of the From-space). The To-space has no real management except for the
accomodation of forwarded objects and large objects. So the To-space is going to be replaced
by a mark-compaction GC, and the large objects will be managed by a LOS GC. 
> In order to minimize the changes to other components of DRLVM, the codes here comply
with the original contract between GCv4 and other components. I also borrowed some routine
code from GCv4 to avoid repetitive labor work.
> GCv5 is under active development, so please expect quick and big changes to this submitted
code base. I will submit new codes from time to time when they are worth a submission. Any
comments or codes are more than welcome. 

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