Re: java/5088: Can't create a java.lang.Object from CNI

Re: java/5088: Can't create a java.lang.Object from CNI

[Tom Tromey]

The following reply was made to PR java/5088; it has been noted by GNATS.

From: Tom Tromey <tromey@redhat.com>
To: bryce@waitaki.otago.ac.nz
Cc: gcc-gnats@gcc.gnu.org
Subject: Re: java/5088: Can't create a java.lang.Object from CNI
Date: 15 Dec 2001 17:48:31 -0700

 >>>>> "Bryce" == bryce  <bryce@waitaki.otago.ac.nz> writes:
 
 Bryce> According to the C++ ABI spec:
 Bryce> <ctor-dtor-name> ::= C1	# complete object (in-charge) constructor
 Bryce> 		   ::= C2	# base object (not-in-charge) constructor
 
 gcc/java/mangle.c:mangle_method_decl() explicitly chooses `C2' here.
 However, based on my reading of the ABI spec, I think that this is
 incorrect, and that we should use `C1' everywhere.
 I'm testing a patch now.
 
 Tom

Re: java/5088: Can't create a java.lang.Object from CNI

[tromey]

Synopsis: Can't create a java.lang.Object from CNI

State-Changed-From-To: analyzed->closed
State-Changed-By: tromey
State-Changed-When: Sun Dec 16 14:54:05 2001
State-Changed-Why:
    I've checked in the patch.
    I'm closing this since it works on your test case.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5088

Re: java/5088: Can't create a java.lang.Object from CNI

[tromey]

Synopsis: Can't create a java.lang.Object from CNI

Responsible-Changed-From-To: unassigned->tromey
Responsible-Changed-By: tromey
Responsible-Changed-When: Sun Dec 16 14:25:01 2001
Responsible-Changed-Why:
    I'm handling this.
State-Changed-From-To: open->analyzed
State-Changed-By: tromey
State-Changed-When: Sun Dec 16 14:25:01 2001
State-Changed-Why:
    I've submitted a patch:
    http://gcc.gnu.org/ml/java-patches/2001-q4/msg00444.html

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=5088

java/5088: Can't create a java.lang.Object from CNI

[bryce]

>Number:         5088
>Category:       java
>Synopsis:       Can't create a java.lang.Object from CNI
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Dec 11 22:46:01 PST 2001
>Closed-Date:
>Last-Modified:
>Originator:     Bryce
>Release:        gcc version 3.1 20011207 (experimental)
>Organization:
>Environment:

>Description:
The test case below does not link.

$ gcc InvokeCNI.cc -lgcj
/tmp/ccoD0wXw.o: In function `main':
/tmp/ccoD0wXw.o(.text+0x48): undefined reference to `java::lang::Object::Object()'
collect2: ld returned 1 exit status

$ nm InvokeCNI.o | grep ObjectC 
         U _ZN4java4lang6ObjectC1Ev

$ nm ~/cvs/gcc/build/i686-pc-linux-gnu/libjava/java/lang/Object.o | grep ObjectC
00000030 T _ZN4java4lang6ObjectC2Ev

According to the C++ ABI spec:

<ctor-dtor-name> ::= C1	# complete object (in-charge) constructor
		   ::= C2	# base object (not-in-charge) constructor

>How-To-Repeat:
#include <gcj/cni.h>
#include <java/lang/Object.h>

int main(int argc, char *argv)
{
  using namespace java::lang;
  
  _Jv_CreateJavaVM (NULL);
  _Jv_AttachCurrentThread (NULL, NULL);
  
  new java::lang::Object ();
}

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: