public inbox for java-prs@sourceware.org
help / color / mirror / Atom feed
* [Bug java/20215] New: gcj does not accept classes with same name fields
@ 2005-02-26 16:13 bonniot at users dot sf dot net
2005-02-26 16:34 ` [Bug java/20215] " bonniot at users dot sf dot net
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: bonniot at users dot sf dot net @ 2005-02-26 16:13 UTC (permalink / raw)
To: java-prs
According to the JVM spec, class files can have several fields with the same
name. As long as they have different types, they will be distinguished since all
field operations specify both the name and the field of the field. Sun's JVM
accepts such classes, and correctly distinguishes the fields, as you can see in
the attached testcase. Here is the disassembly of this class:
Access flags: 0x20 super
This class: 2=DuplicateField, super: 4=java.lang.Object
Interfaces (count: 0):
Fields (count: 2):
Field name:"foo" static Signature: 6=java.lang.String
Field name:"foo" static Signature: 7=int
Methods (count: 3):
Method name:"<init>" Signature: 9=()void
Attribute "Code", length:17, max_stack:1, max_locals:1, code_length:5
0: aload_0
1: invokespecial #11=<Method java.lang.Object.<init> ()void>
4: return
Method name:"main" public static Signature: 14=(java.lang.String[])void
Attribute "Code", length:31, max_stack:2, max_locals:1, code_length:19
0: getstatic #20=<Field java.lang.System.out java.io.PrintStream>
3: getstatic #22=<Field DuplicateField.foo java.lang.String>
6: invokevirtual #28=<Method java.io.PrintStream.println (java.lang.String)void>
9: getstatic #20=<Field java.lang.System.out java.io.PrintStream>
12: getstatic #30=<Field DuplicateField.foo int>
15: invokevirtual #33=<Method java.io.PrintStream.println (int)void>
18: return
Method name:"<clinit>" static Signature: 9=()void
Attribute "Code", length:24, max_stack:1, max_locals:0, code_length:12
0: ldc #36=<String "WOW">
2: putstatic #22=<Field DuplicateField.foo java.lang.String>
5: sipush 42
8: putstatic #30=<Field DuplicateField.foo int>
11: return
Sun's JVM correctly executes that program:
$ java DuplicateField
WOW
42
gcj fails during compilation with:
$ gcj DuplicateField.class
DuplicateField.java: In class 'DuplicateField':
DuplicateField.java: In method 'DuplicateField.main(java.lang.String[])':
DuplicateField.java:0: error: mismatching signature for field 'foo' in
'DuplicateField'
DuplicateField.java: In method 'DuplicateField.<clinit>()':
DuplicateField.java:0: error: mismatching signature for field 'foo' in
'DuplicateField'
Surprisingly, gij also fails with:
Exception in thread "main" java.lang.NullPointerException
at java.io.PrintStream.println(java.lang.String) (/tmp/gcc/lib/libgcj.so.6.0.0)
at DuplicateField.main(java.lang.String[]) (Unknown Source)
at gnu.java.lang.MainThread.call_main() (/tmp/gcc/lib/libgcj.so.6.0.0)
at gnu.java.lang.MainThread.run() (/tmp/gcc/lib/libgcj.so.6.0.0)
gcj (GCC) 4.0.0 20050223
--
Summary: gcj does not accept classes with same name fields
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: java
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: bonniot at users dot sf dot net
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=20215
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug java/20215] gcj does not accept classes with same name fields
2005-02-26 16:13 [Bug java/20215] New: gcj does not accept classes with same name fields bonniot at users dot sf dot net
@ 2005-02-26 16:34 ` bonniot at users dot sf dot net
2005-03-07 17:18 ` cvs-commit at gcc dot gnu dot org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: bonniot at users dot sf dot net @ 2005-02-26 16:34 UTC (permalink / raw)
To: java-prs
------- Additional Comments From bonniot at users dot sf dot net 2005-02-25 19:50 -------
Created an attachment (id=8285)
--> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=8285&action=view)
Testcase
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20215
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug java/20215] gcj does not accept classes with same name fields
2005-02-26 16:13 [Bug java/20215] New: gcj does not accept classes with same name fields bonniot at users dot sf dot net
2005-02-26 16:34 ` [Bug java/20215] " bonniot at users dot sf dot net
@ 2005-03-07 17:18 ` cvs-commit at gcc dot gnu dot org
2005-03-08 10:05 ` cvs-commit at gcc dot gnu dot org
2005-05-27 0:17 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2005-03-07 17:18 UTC (permalink / raw)
To: java-prs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2005-03-07 17:11 -------
Subject: Bug 20215
CVSROOT: /cvs/gcc
Module name: gcc
Branch: gcc-4_0-branch
Changes by: tromey@gcc.gnu.org 2005-03-07 17:11:29
Modified files:
libjava : ChangeLog link.cc
libjava/include: jvm.h
Log message:
PR java/20215:
* include/jvm.h (_Jv_Linker::find_field_helper): Updated.
* link.cc (find_field_helper): Added 'type' argument.
(find_field): Updated.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/libjava/ChangeLog.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.3391.2.3&r2=1.3391.2.4
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/libjava/link.cc.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.10&r2=1.10.2.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/libjava/include/jvm.h.diff?cvsroot=gcc&only_with_tag=gcc-4_0-branch&r1=1.77&r2=1.77.2.1
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20215
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug java/20215] gcj does not accept classes with same name fields
2005-02-26 16:13 [Bug java/20215] New: gcj does not accept classes with same name fields bonniot at users dot sf dot net
2005-02-26 16:34 ` [Bug java/20215] " bonniot at users dot sf dot net
2005-03-07 17:18 ` cvs-commit at gcc dot gnu dot org
@ 2005-03-08 10:05 ` cvs-commit at gcc dot gnu dot org
2005-05-27 0:17 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: cvs-commit at gcc dot gnu dot org @ 2005-03-08 10:05 UTC (permalink / raw)
To: java-prs
------- Additional Comments From cvs-commit at gcc dot gnu dot org 2005-03-07 17:18 -------
Subject: Bug 20215
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: tromey@gcc.gnu.org 2005-03-07 17:18:33
Modified files:
libjava : ChangeLog link.cc
libjava/include: jvm.h
Log message:
PR java/20215:
* include/jvm.h (_Jv_Linker::find_field_helper): Updated.
* link.cc (find_field_helper): Added 'type' argument.
(find_field): Updated.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/libjava/ChangeLog.diff?cvsroot=gcc&r1=1.3399&r2=1.3400
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/libjava/link.cc.diff?cvsroot=gcc&r1=1.10&r2=1.11
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/libjava/include/jvm.h.diff?cvsroot=gcc&r1=1.77&r2=1.78
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20215
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug java/20215] gcj does not accept classes with same name fields
2005-02-26 16:13 [Bug java/20215] New: gcj does not accept classes with same name fields bonniot at users dot sf dot net
` (2 preceding siblings ...)
2005-03-08 10:05 ` cvs-commit at gcc dot gnu dot org
@ 2005-05-27 0:17 ` pinskia at gcc dot gnu dot org
3 siblings, 0 replies; 5+ messages in thread
From: pinskia at gcc dot gnu dot org @ 2005-05-27 0:17 UTC (permalink / raw)
To: java-prs
------- Additional Comments From pinskia at gcc dot gnu dot org 2005-05-27 00:17 -------
Confirmed, the gij problem has been fixed by the patches above, this only leaves the java front-end
problem.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed| |1
Keywords| |rejects-valid
Last reconfirmed|0000-00-00 00:00:00 |2005-05-27 00:17:46
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20215
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2005-05-27 0:17 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2005-02-26 16:13 [Bug java/20215] New: gcj does not accept classes with same name fields bonniot at users dot sf dot net
2005-02-26 16:34 ` [Bug java/20215] " bonniot at users dot sf dot net
2005-03-07 17:18 ` cvs-commit at gcc dot gnu dot org
2005-03-08 10:05 ` cvs-commit at gcc dot gnu dot org
2005-05-27 0:17 ` pinskia at gcc dot gnu dot org
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).