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digitalmars.D.bugs - Linux DWARF2 Line Numbering not working

reply John Demme <me teqdruid.com> writes:
When I compile this file with:
dmd -g test.d
using DMD 0.113 on Linux, then run
gdb test
and at the gdb command prompt run:
(gdb) b test.d:7
To set a breakpoint at line 7, it gives me:
No line 7 in file "test.d".
According to emacs, line 7 is the second writefln line.


I've not yet been able to get linux debugging to work, and worse yet, I 
haven't even been able to get any responses about this.  Supposedly, the 
DWARF2 line number info was added in DMD 0.103, but doesn't work.

The unfortunate part is that I've been posting about this for some time, 
and haven't been able to get a single person to respond about it.  Can 
anyone even verify that this isn't just my computer?  Has anyone else 
had success with Linux Debugging?

This total lack of responsiveness is really starting to get to me.

John Demme
Feb 28 2005
parent reply =?ISO-8859-1?Q?Anders_F_Bj=F6rklund?= <afb algonet.se> writes:
John Demme wrote:


 When I compile this file with:
 dmd -g test.d
 using DMD 0.113 on Linux, then run
 gdb test
 and at the gdb command prompt run:
 (gdb) b test.d:7
 To set a breakpoint at line 7, it gives me:
 No line 7 in file "test.d".
 According to emacs, line 7 is the second writefln line.


Same behaviour in DMD 0.114, on Fedora Core 1.


 The unfortunate part is that I've been posting about this for some time, 
 and haven't been able to get a single person to respond about it.  Can 
 anyone even verify that this isn't just my computer?  Has anyone else 
 had success with Linux Debugging?


However, the same program works fine with GDC 0.10:

(gdb) b test.d:7
Breakpoint 1 at 0x80495f3: file test.d, line 7.
(gdb) run
Starting program: /tmp/test
[Thread debugging using libthread_db enabled]
[New Thread -1084688992 (LWP 21617)]
5
[Switching to Thread -1084688992 (LWP 21617)]

Breakpoint 1, _Dmain () at test.d:7
7         writefln("%d", a);


So you might consider changing compilers meanwhile ?

--anders
Feb 28 2005
parent reply John Demme <me teqdruid.com> writes:
I've been trying GDC as well, and it seems to work pretty well with 
small programs, but either it's got some issues as well, or I'm having 
some other problems with larger programs, like ones that use Mango.

Thanks for the reply,
John

Anders F Björklund wrote:

 John Demme wrote:
 

 When I compile this file with:
 dmd -g test.d
 using DMD 0.113 on Linux, then run
 gdb test
 and at the gdb command prompt run:
 (gdb) b test.d:7
 To set a breakpoint at line 7, it gives me:
 No line 7 in file "test.d".
 According to emacs, line 7 is the second writefln line.


 
 
 Same behaviour in DMD 0.114, on Fedora Core 1.
 

 The unfortunate part is that I've been posting about this for some 
 time, and haven't been able to get a single person to respond about 
 it.  Can anyone even verify that this isn't just my computer?  Has 
 anyone else had success with Linux Debugging?


 
 
 However, the same program works fine with GDC 0.10:
 
 (gdb) b test.d:7
 Breakpoint 1 at 0x80495f3: file test.d, line 7.
 (gdb) run
 Starting program: /tmp/test
 [Thread debugging using libthread_db enabled]
 [New Thread -1084688992 (LWP 21617)]
 5
 [Switching to Thread -1084688992 (LWP 21617)]
 
 Breakpoint 1, _Dmain () at test.d:7
 7         writefln("%d", a);
 
 
 So you might consider changing compilers meanwhile ?
 
 --anders
Feb 28 2005
parent reply =?ISO-8859-1?Q?Anders_F_Bj=F6rklund?= <afb algonet.se> writes:
John Demme wrote:


 I've been trying GDC as well, and it seems to work pretty well with 
 small programs, but either it's got some issues as well, or I'm having 
 some other problems with larger programs, like ones that use Mango.


Hear you on the Mango problems...


Well, DMD got tracing (-gt) fixed recently - maybe the debugging
support (-g) can be fixed in a short matter of time as well... ?

The release notes just say:

 -g is not implemented, because I haven't figured out how to
 do it yet. gdb still works, though, at the global symbol level.


--anders
Feb 28 2005
parent reply John Demme <me teqdruid.com> writes:
Anders F Björklund wrote:

 John Demme wrote:
 

 I've been trying GDC as well, and it seems to work pretty well with 
 small programs, but either it's got some issues as well, or I'm having 
 some other problems with larger programs, like ones that use Mango.


 
 
 Hear you on the Mango problems...
 
 
 Well, DMD got tracing (-gt) fixed recently - maybe the debugging
 support (-g) can be fixed in a short matter of time as well... ?
 
 The release notes just say:
 

 -g is not implemented, because I haven't figured out how to
 do it yet. gdb still works, though, at the global symbol level.


 


Right, but if you look at the Changelog, line numbering was added in 0.103.
Feb 28 2005
parent =?ISO-8859-1?Q?Anders_F_Bj=F6rklund?= <afb algonet.se> writes:
John Demme wrote:


 The release notes just say:


 -g is not implemented, because I haven't figured out how to
 do it yet. gdb still works, though, at the global symbol level.




 
 Right, but if you look at the Changelog, line numbering was added in 0.103.


Interesting, it seems to include *some* line numbers:


 import std.stdio;
 int main()
 {
   writefln("Hello, World!");
   return 0;
 }


dmd -g -release -c hello.d

objdump -l -d hello.o


 hello.o:     file format elf32-i386
 
 Disassembly of section .text:
 
 00000000 <gcc2_compiled.>:
 _Dmain():
 /tmp/hello.d:2
    0:   c3 60 b8 38 00 00 00 b9 00 00 00 00 8b 11 89 10     .`.8............
 gcc2_compiled.():
   10:   89 01 61 c3                                         ..a.
 Disassembly of section .gnu.linkonce.t_Dmain:
 
 00000000 <_Dmain>:
 _Dmain():
    0:   55                      push   %ebp
    1:   8b ec                   mov    %esp,%ebp
 /tmp/hello.d:4
    3:   ff 35 14 00 00 00       pushl  0x14
    9:   ff 35 10 00 00 00       pushl  0x10
    f:   ff 35 04 00 00 00       pushl  0x4
   15:   ff 35 00 00 00 00       pushl  0x0
   1b:   e8 fc ff ff ff          call   1c <_Dmain+0x1c>
   20:   31 c0                   xor    %eax,%eax
   22:   83 c4 10                add    $0x10,%esp
   25:   5d                      pop    %ebp
   26:   c3                      ret    


As opposed to:


 #include <stdio.h>
 int main()
 {
   printf("Hello, World!\n");
   return 0;
 }


gcc -g -c chello.c

objdump -l -d chello.o


 chello.o:     file format elf32-i386
 
 Disassembly of section .text:
 
 00000000 <main>:
 main():
 /tmp/chello.c:3
    0:   55                      push   %ebp
    1:   89 e5                   mov    %esp,%ebp
    3:   83 ec 08                sub    $0x8,%esp
    6:   83 e4 f0                and    $0xfffffff0,%esp
    9:   b8 00 00 00 00          mov    $0x0,%eax
    e:   83 c0 0f                add    $0xf,%eax
   11:   83 c0 0f                add    $0xf,%eax
   14:   c1 e8 04                shr    $0x4,%eax
   17:   c1 e0 04                shl    $0x4,%eax
   1a:   29 c4                   sub    %eax,%esp
 /tmp/chello.c:4
   1c:   c7 04 24 00 00 00 00    movl   $0x0,(%esp)
   23:   e8 fc ff ff ff          call   24 <main+0x24>
 /tmp/chello.c:5
   28:   b8 00 00 00 00          mov    $0x0,%eax
 /tmp/chello.c:6
   2d:   c9                      leave  
   2e:   c3                      ret    


--anders
Mar 01 2005