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* [Bug libgcj/18086] New: automate marking of Class object
@ 2004-10-20 18:25 tromey at gcc dot gnu dot org
2004-10-20 18:27 ` [Bug libgcj/18086] " pinskia at gcc dot gnu dot org
0 siblings, 1 reply; 3+ messages in thread
From: tromey at gcc dot gnu dot org @ 2004-10-20 18:25 UTC (permalink / raw)
To: java-prs
Currently we have hand-written code to mark Class instances.
This is slow and is also bug-prone; we find problems in this
code with annoying frequency. It may also be related to PR 16902.
It doesn't look hard to automate marking of Class. Here is a plan:
* Rearrange fields of Class so that all marked fields are early,
with non-marked fields later.
* Change gcj to emit a GC descriptor for Class. Have the compiler
abort() if a change is made to Class that causes us not to be able
to make a GC descriptor.
* For all objects referenced by Class that are dynamically allocated,
introduce a new descriptor kind at runtime. Change how these objects
are allocated, so that they will be marked by the GC and not by
special code as a side effect of marking the class. This should help
the problem that Anthony noticed (see email message linked from PR 16902)
--
Summary: automate marking of Class object
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: libgcj
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: tromey at gcc dot gnu dot org
CC: gcc-bugs at gcc dot gnu dot org,java-prs at gcc dot gnu
dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18086
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug libgcj/18086] automate marking of Class object
2004-10-20 18:25 [Bug libgcj/18086] New: automate marking of Class object tromey at gcc dot gnu dot org
@ 2004-10-20 18:27 ` pinskia at gcc dot gnu dot org
0 siblings, 0 replies; 3+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2004-10-20 18:27 UTC (permalink / raw)
To: java-prs
------- Additional Comments From pinskia at gcc dot gnu dot org 2004-10-20 18:27 -------
Confirmed.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Last reconfirmed|0000-00-00 00:00:00 |2004-10-20 18:27:53
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18086
^ permalink raw reply [flat|nested] 3+ messages in thread
* [Bug libgcj/18086] automate marking of Class object
[not found] <bug-18086-360@http.gcc.gnu.org/bugzilla/>
@ 2006-02-08 20:13 ` tromey at gcc dot gnu dot org
0 siblings, 0 replies; 3+ messages in thread
From: tromey at gcc dot gnu dot org @ 2006-02-08 20:13 UTC (permalink / raw)
To: java-prs
------- Comment #2 from tromey at gcc dot gnu dot org 2006-02-08 20:13 -------
Note that this bug may not be as severe now that we've simplified
Class marking in _Jv_MarkObj.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18086
^ permalink raw reply [flat|nested] 3+ messages in thread
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2004-10-20 18:25 [Bug libgcj/18086] New: automate marking of Class object tromey at gcc dot gnu dot org
2004-10-20 18:27 ` [Bug libgcj/18086] " pinskia at gcc dot gnu dot org
[not found] <bug-18086-360@http.gcc.gnu.org/bugzilla/>
2006-02-08 20:13 ` tromey at gcc dot gnu dot org
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