The m/c I use is Solaris running:
SS hirst 5.10 Generic_118822-26 sun4u sparc SUNW,Sun-Blade-2500
I have gcc version 3.4.3 installed:
Reading specs from /
Configured with:
/
/usr/sfw /usr/sfw/bin/gas
/usr/ccs/bin/ld ,c++
Thread model: posix
gcc version 3.4.3 ()
and gcc version 4.1.1 installed:
Using built-in specs.
Target: sparc-sun-solaris2.10
Configured with: /gcc-4.1.1a/configure /opt/gcc-4.4.1
/usr/sfw/bin/gas /usr/ccs/bin/ld
,c++
Thread model: posix
gcc version 4.1.1
I have two problems when I enter GDB debugger via DDD (I get the problem even
without DDD) I get the following:
1) (gdb) run deptsv li ~/lsa/src/web/inp.file
warning: Lowest section in /usr/lib/libthread.so.1 is .dynamic at 00000074
warning: Lowest section in /usr/lib/libdl.so.1 is .dynamic at 00000094
Breakpoint 1, w_listDepts () at /
/
Why am I getting the 'Lowest section' message ? How can I avoid it ?
2) When I step through line by line through the code using 'n' for next, when
it hits a particular while loop I get the following:
(gdb) n
Single stepping until exit from function w_dept_populate,
which has no line number information.
w_listDepts () at /
I have built all the C modules with -g flag and I get this with both versions
of gcc. I cannot seem to step through the code in my while loop. Please help. I
need to know what I am doing wrong or what is causing this. As the module has
been compiled with -g I would have expected every line to be stepped through.
Please note that I can set breaks to one of the lines in the while loop buut
the moment I say 'n' I get the above message
Please help
Cheers,
Alex

Comment #1 from pinskia at gcc dot gnu dot org 2006-07-27 21:32
And why do you think this is a GCC bug and not a GDB bug?

Comment #2 from pinskia at gcc dot gnu dot org 2006-07-27 21:32
Also we need a testcase to be able to reproduce this.

Comment #3 from alex dot jacob at logicacmg dot com 2006-07-28 19:00
Hello,
Thanks for the prompt reply.
Sadly, I am not able to generate a test case for this. All the while loops I
write to try and duplicate this seems to work fine. The specific case where
this is a problem is deep inside code which is a link of many objects and
shared objects. The strange thing is I can see all the line numbers, can set
break to line numbers etc. but when stepping across these lines I get the
'Single' error. The code itself works fine Even if I comment out some
bits of code still this happens - only in this section of the code !!! I'll
have to look at this again later if I come across another occurrence of the
same problem (in a different area).

I assumed it might be gcc as the message seems to say 'no line number
information' and this info is generated by the compiler. I agree that the fault
could be in the GDB alsoI currently have gdb 6.4 should I try with some
earlier version ? What do you think ?

Any ideas on the 'warning: Lowest section in /usr/lib/libthread.so.1 is
dynamic' messages ?

Cheers,
Alex

Comment #4 from pinskia at gcc dot gnu dot org 2006-07-29 05:28
(In reply to comment #3)
Any ideas on the 'warning: Lowest section in /usr/lib/libthread.so.1 is
.dynamic' messages ?

That is a gdb question and I don't know how to answer it.

Also are you compiling with just -g or you using optimization also?

Comment #5 from alex dot jacob at logicacmg dot com 2006-07-31 09:27
Hi,
I'm just using -gno optimisations.
Cheers,
Alex