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From Apache Wiki <wikidi...@apache.org>
Subject [Harmony Wiki] Trivial Update of "DRLVM Development Tasks" by Vladimir Beliaev
Date Fri, 15 Feb 2008 16:53:11 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Harmony Wiki" for change notification.

The following page has been changed by Vladimir Beliaev:

New page:
This page contains a list of development tasks for the Harmony Virtial Machine (DRLVM) which
are not JIT or GC specific. If you pick a task please do not forget to let us know about your
choice in [http://incubator.apache.org/harmony/mailing.html the mailing list].

If you are not sure what you can start with then refer to[http://harmony.apache.org/subcomponents/drlvm/developers_guide.html
Dynamic Runtime Layer Virtual Machine Developer's Guide] to get the basic concepts and terms,
components and modules description.

== Kernel Classes ==

This section caontains a list of isolated development tasks, which do not require advanced
knowledge of VM and could be a nice start for newbies to get acquainted with the code. All
items are targeted for better code sharing.

=== 1. Improve/re-implement a Java5.0 generic signatures parser in DRLVM ===
'''''Problem:''''' ([https://issues.apache.org/jira/browse/HARMONY-2052 HARMONY-2052]). The
current implementation is messy and half-baked, one needs to invent more shaped and modular
API to the module, develop a simple parser/lexer to avoid antlr dependency and move this functionality
to classlib (luni ?), so other VMs could reuse it for 1.5 support.

'''''Task:''''' Improve/re-implement a Java5.0 generic signatures parser in DRLVM.

=== 2. Unify implementation of j.l.Runtime/Process ===
'''''Problem:''''' ([https://issues.apache.org/jira/browse/HARMONY-2051 HARMONY-2051]) The
classlib provides a neat portlib-based reference implementation [*], which should be reused.
These two implementations are roughly identical, so one needs to make more scrupulous comparison
and squeeze some features/fixes of [**], which may be missing in [*], then employ [*] in {{{j.l.Runtime}}}
of DRLVM and drop [**].

'''''Task:''''' Eliminate duplicate implementation of j.l.Runtime.Process in kernel classes

[*] working_classlib\modules\luni\src\main\java\org\apache\harmony\luni\internal\process\*
+ working_classlib\modules\luni\src\main\native\luni\shared\process.c
[**] working_vm\vm\vmcore\src\kernel_classes\javasrc\java\lang\Runtime.java + working_vm\vm\vmcore\src\kernel_classes\native\Runtime_[lnx|win].cpp

=== 3. Move port_user_timezone() from DRLVM to classlib ===
'''''Problem:''''' ([https://issues.apache.org/jira/browse/HARMONY-2053 HARMONY-2053]) There
is no reason to burden VM with initializing "user.timezone" property value during VM startup
for Classlib's j.u.TimeZone class. This action should be done by hyluni natives during {{{JNI_OnLoad}}},
therefore it is suggested to move {{{port_user_timezone()}}} function from DRLVM to classlib
(luni/port), and fix DRLVM & hyluni accordingly.

'''''Task:''''' Move port_user_timezone() from DRLVM to classlib.

=== <name> ===
'''''Problem:''''' .


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