Re: debug/6195: N_SLINE stab not produced for simple declarations

Re: debug/6195: N_SLINE stab not produced for simple declarations

[ljrittle]

Synopsis: N_SLINE stab not produced for simple declarations

Responsible-Changed-From-To: unassigned->ljrittle
Responsible-Changed-By: ljrittle
Responsible-Changed-When: Wed Mar 26 07:14:16 2003
Responsible-Changed-Why:
    Mine.
State-Changed-From-To: feedback->closed
State-Changed-By: ljrittle
State-Changed-When: Wed Mar 26 07:14:16 2003
State-Changed-Why:
    Make your test case more complex:
    int foo(int);
    main()
    {
      int i;
      foo(i);
    }
    
    Compile, with a request for stabs:
    /usr/local/beta-gcc/bin/g++ -gstabs -S t.C # 3.4
    
    Looks OK to me.  I also looked at your original case with
    2.95.4 as installed as the FreeBSD 4 system compiler and 3.2.2
    as installed from ports it also looked correct.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=6195

Re: debug/6195: N_SLINE stab not produced for simple declarations

[bangerth]

Synopsis: N_SLINE stab not produced for simple declarations

State-Changed-From-To: open->feedback
State-Changed-By: bangerth
State-Changed-When: Fri Mar 14 02:54:25 2003
State-Changed-Why:
    Hm, I can't reproduce this on my (linux) box. Can you
    say exactly what line you are looking for? With both
    2.95 and 3.0 and both gcc and g++, I get a line
    	.stabs	"i:(0,1)",128,0,3,-4
    in the output.
    
    Also, note that since gcc3.2, dwarf2 is the default
    debug format, so the point may be moot (although we might
    still want to fix it for systems that still use stabs).
    
    Thanks
      Wolfgang

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=6195

debug/6195: N_SLINE stab not produced for simple declarations

[aryeh]

>Number:         6195
>Category:       debug
>Synopsis:       N_SLINE stab not produced for simple declarations
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Apr 05 14:56:00 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     aryeh@dreamzion.com
>Release:        i386-unknown-freebsd-2.95 through 3.0.4
>Organization:
>Environment:
Stock freebsd 4.X
>Description:
the following code does not produce a N_SLINE stab for "int i".  this bug ONLY happens with g++ and not gcc:

main()
{
       Int i;
}

here is the asm output:

        .file   "foo.c"
        .version        "01.01"
.stabs "/home/aryeh/",100,0,0,.Ltext0
.stabs "foo.c",100,0,0,.Ltext0
.text
.Ltext0:
        .stabs  "gcc2_compiled.", 0x3c, 0, 0, 0
.stabs "int:t(0,1)=r(0,1);0020000000000;0017777777777;",128,0,0,0
.stabs "char:t(0,2)=r(0,2);0;127;",128,0,0,0
.stabs "long int:t(0,3)=r(0,1);0020000000000;0017777777777;",128,0,0,0
.stabs "unsigned int:t(0,4)=r(0,1);0000000000000;0037777777777;",128,0,0,0
.stabs "long unsigned int:t(0,5)=r(0,1);0000000000000;0037777777777;",128,0,0,0
.stabs "long long int:t(0,6)=r(0,1);01000000000000000000000;0777777777777777777777;",128,0,0,0
.stabs "long long unsigned int:t(0,7)=r(0,1);0000000000000;01777777777777777777777;",128,0,0,0
.stabs "short int:t(0,8)=r(0,8);-32768;32767;",128,0,0,0
.stabs "short unsigned int:t(0,9)=r(0,9);0;65535;",128,0,0,0
.stabs "signed char:t(0,10)=r(0,10);-128;127;",128,0,0,0
.stabs "unsigned char:t(0,11)=r(0,11);0;255;",128,0,0,0
.stabs "float:t(0,12)=r(0,1);4;0;",128,0,0,0
.stabs "double:t(0,13)=r(0,1);8;0;",128,0,0,0
.stabs "long double:t(0,14)=r(0,1);12;0;",128,0,0,0
.stabs "complex int:t(0,15)=s8real:(0,1),0,32;imag:(0,1),32,32;;",128,0,0,0
.stabs "complex float:t(0,16)=r(0,16);4;0;",128,0,0,0
.stabs "complex double:t(0,17)=r(0,17);8;0;",128,0,0,0
.stabs "complex long double:t(0,18)=r(0,18);12;0;",128,0,0,0
.stabs "bool:t(0,19)=@s8;-16;",128,0,0,0
.stabs "void:t(0,20)=(0,20)",128,0,0,0
.stabs "__wchar_t:t(0,21)=r(0,1);0020000000000;0017777777777;",128,0,0,0
.stabs "__vtbl_ptr_type:t(0,22)=s8__delta:(0,8),0,16;__index:(0,8),16,16;__pfn:(0,23)=*(0,20),32,3
2;__delta2:(0,8),32,16;;",128,0,0,0
        .p2align 2,0x90
.stabs "main:F(0,1)",36,0,2,main
.globl main
                .type            main,@function
main:
        pushl %ebp
        movl %esp,%ebp
        subl $24,%esp
.stabn 68,0,2,.LM1-main
.LM1:
.stabn 68,0,2,.LM2-main
.LM2:
.LBB2:
.LBE2:
        xorl %eax,%eax
        jmp .L2
.stabn 68,0,4,.LM3-main
.LM3:
        .p2align 2,0x90
.L2:
        leave
        ret
.Lfe1:
                .size            main,.Lfe1-main
.stabs "main:F(0,1)",36,0,2,main
.stabs "i:(0,1)",128,0,3,-4
.stabn 192,0,0,.LBB2-main
.stabn 224,0,0,.LBE2-main
.Lscope0:
.stabs "",36,0,0,.Lscope0-main
        .text
        .stabs "",100,0,0,.Letext
.Letext:
        .ident  "GCC: (GNU) cplusplus 2.95.3 20010315 (release) [FreeBSD]"
>How-To-Repeat:
compile the above source with g++ -g -S
>Fix:
The stab generator has to be fixed.  I am going to spend next week patching my version and will post diff's here later.
>Release-Note:
>Audit-Trail:
>Unformatted: