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Re: Dwarf2-related Internal error


Hi Daniel, Elena and others,
this problem is still present in recent HEAD - could anyone who knows the internals of symbols handling and .debug_info please help me with fixing it, please? I tried to debug it myself but got quickly lost in all those symbols<->types<->other_types references and couldn't find where the problem originates.


Also pointing out the right direction where to look for the bug would help me a lot :-)

BTW I also filled a PR with a very nice number 1333 for this issue.

Thanks in advance!

Michal Ludvig

Michal Ludvig told me that:
Hi all,
I have problems debugging the attached code (real.f) on AMD64 platform. However the problem doesn't seem to be AMD64-related, but Dwarf2-related instead and it only happens if it is compiled by the PGI fortran compiler (beta is available for free download at www.pgroup.com/AMD64).


Debugging the 'real' binary on AMD64/Linux systems leads to GDB internal error:

$ ../gdb real
GNU gdb 2003-07-08-cvs
Copyright 2003 Free Software Foundation, Inc.
[...]
This GDB was configured as "x86_64-unknown-linux-gnu"...
(gdb) b hurdgy
Breakpoint 1 at 0x4000113c: file real.f, line 8.
(gdb) r
Starting program: /tmp/gdbbuild/gdb/fortran/real

Breakpoint 1, hurdgy (xx=
/ttt/64/gdb-head/gdb/utils.c:1058: internal-error: virtual memory exhausted: can't allocate 4294967404 bytes.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Quit this debugging session? (y or n) y


/ttt/64/gdb-head/gdb/utils.c:1058: internal-error: virtual memory exhausted: can't allocate 4294967404 bytes.
A problem internal to GDB has been detected,
further debugging may prove unreliable.
Create a core file of GDB? (y or n) n
$


Something is wrong in parsing the Dwarf2 .debug_info section - unfortunately I don't understand the GDB internals in this field.
Could someone help me with it, please?


All relevant files (source, asm, binaries, cores) are available at:
http://tmp.logix.cz/amd/fortran/

Thanks in advance for any help!

Michal Ludvig


------------------------------------------------------------------------


      real flat(10)
      call hurdgy(flat, 10)

end

      subroutine hurdgy(xx,i)
      integer i
      real xx(i)
      end


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