help needed with gdb

[eles]

hello everybody,

here is my setup:
Linux system 2.6.32-22-generic #33-Ubuntu SMP Wed Apr 28 13:28:05 UTC 2010
x86_64 GNU/Linux

and here is gdbtest.d

import std.stdio;

int x=0;
string t=hello!;

int main(){
writefln(x=%d,x);
writefln(t=%s,t);
return 0;
}

I compiled the latest weekly buid of gdb (7.1.50.20100519) and installed dmd
2.046 via the deb file (including the multilib tools).

then I tried to debug gdbtest. I received the errors below.

u...@system:~/Desktop/temp$ dmd gdbtest.d -g
u...@system:~/Desktop/temp$ ./gdbtest
x=0
t=hello!
u...@system:~/Desktop/temp$ gdb --version
GNU gdb (GDB) 7.1.50.20100519
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type show copying
and show warranty for details.
This GDB was configured as x86_64-unknown-linux-gnu.
For bug reporting instructions, please see:
http://www.gnu.org/software/gdb/bugs/.
u...@system:~/Desktop/temp$ gdb ./gdbtest
GNU gdb (GDB) 7.1.50.20100519
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later http://gnu.org/licenses/gpl.html
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type show copying
and show warranty for details.
This GDB was configured as x86_64-unknown-linux-gnu.
For bug reporting instructions, please see:
http://www.gnu.org/software/gdb/bugs/...
Reading symbols from /home/felix/Desktop/temp/gdbtest...done.
(gdb) break main
Breakpoint 1 at 0x804efd7
(gdb) run
Starting program: /home/felix/Desktop/temp/gdbtest
warning: the debug information found in /lib/ld-2.11.1.so does not match /
lib/ld-linux.so.2 (CRC mismatch).

[Thread debugging using libthread_db enabled]

Breakpoint 1, 0x0804efd7 in main ()
(gdb) next
Single stepping until exit from function main,
which has no line number information.
x=0
t=hello!
0xf7e45bd6 in __libc_start_main () from /lib32/libc.so.6
(gdb)
Single stepping until exit from function __libc_start_main,
which has no line number information.

Program exited normally.
(gdb)

as you see, the debug session was unsuccesful. can anybody enlighten me why?
what is the line warning: the debug information found in /lib/ld-2.11.1.so
does not match /lib/ld-linux.so.2 (CRC mismatch).?

thank you

eles

Re: help needed with gdb

[Robert Clipsham]

On 19/05/10 20:45, eles wrote:

as you see, the debug session was unsuccesful. can anybody enlighten me why?
what is the line warning: the debug information found in /lib/ld-2.11.1.so
does not match /lib/ld-linux.so.2 (CRC mismatch).?

thank you

eles


You'd need to talk to the gdb devs about this, I'm not sure what this 
error means, given that it's to do with .so's that aren't part of the D 
distribution I'd guess it's a general gdb error. Try the following C 
code and see if you get the same error when trying to debug it:


int main()
{
  return 0;
}

$ gcc -g test.c -o test
$ gdb ./test
run the same commands as before in gdb

If you get the same errors it's either a gdb problem or a problem with 
your set up. As a side note, if you want to break at the main() function 
in your D file, you need to do 'break _Dmain'.