Re: java/6587: gcj generates incorrect debug output

Re: java/6587: gcj generates incorrect debug output

[Dara Hazeghi]

The following reply was made to PR java/6587; it has been noted by GNATS.

From: Dara Hazeghi <dhazeghi@yahoo.com>
To: gcc-gnats@gcc.gnu.org
Cc:  
Subject: Re: java/6587: gcj generates incorrect debug output
Date: Mon, 12 May 2003 12:30:37 -0700

 http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit- 
 trail&database=gcc&pr=6587
 
 Hello,
 
 I can confirm this problem still exists on gcc 3.2, 3.3 branch and  
 mainline (20030511) on i686-linux.
 
 Dara
 

java/6587: gcj generates incorrect debug output

[tromey]

>Number:         6587
>Category:       java
>Synopsis:       gcj generates incorrect debug output
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon May 06 15:36:00 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     Tom Tromey
>Release:        current trunk
>Organization:
>Environment:
x86 Red Hat Linux 6.2
>Description:
Try compiling this file with "gcj -g":

public class x
{
  public static void main (String[] args)
  {
    char c = args[0].charAt(0);
    System.out.println(c);
  }
}


Using readelf you can see this:

 <2><184>: Abbrev Number: 4 (DW_TAG_subprogram)
     DW_AT_sibling     : <b4>   
     DW_AT_external    : 1      
     DW_AT_name        : x.main(java.lang.String[])     
     DW_AT_decl_file   : 1      
     DW_AT_decl_line   : 458756 
     DW_AT_MIPS_linkage_name: _ZN1x4mainEP6JArrayIPN4java4lang6StringEE 
     DW_AT_declaration : 1      

This confuses gdb.  If you try: b 'x.main', gdb will
tell you there is no such method.

Also this appears for the constructor:

 <2><1db>: Abbrev Number: 6 (DW_TAG_subprogram)
     DW_AT_external    : 1      
     DW_AT_name        : ()     
     DW_AT_MIPS_linkage_name: _ZN1xC1Ev 
     DW_AT_artificial  : 1      
     DW_AT_declaration : 1      

This is also clearly incorrect.
>How-To-Repeat:

>Fix:

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