Insight does not work as required on x86-64 arch.

[alexeik]

I tried to compile and debug .c program with gcc/insight under Fedora 14 x86-64 bit.
program:
#include <stdio.h>

main() {
int a=100;
int b=200;
char *c = "Hello";

printf("Hello\n");
}

I compile it with
gcc -g x.c

then I run debuger:

insight a.out

When I try to see local variables, i see that:
a = (int) Could not read variable object value after assigment
...

in terminal screen I have:

BFD: /lib64/libc.so.6: invalid relocation type 37
BFD: BFD (GNU Binutils) 2.18.50.20080226 assertion fail elf64-x86-64.c:278
BFD: /lib64/libc.so.6: invalid relocation type 37
BFD: BFD (GNU Binutils) 2.18.50.20080226 assertion fail elf64-x86-64.c:278

I tried the same scenario under Fedora 14 686 - everything went OK.

What gives?

[SiliconSlick]

Good question.

Just for grins I tried the one from 13 and 15Alpha on 14 and had the same problem.

Interestingly, when I recompile the 14 .src.rpm, it produces a binary that acts differently the one Fedora distributes. That is odd.

The only luck I had was using the -m32 bit on the compile to force 32-bit compiles. It works then, but isn't much help if you are trying to debug 64-bit apps (and I assume you are debugging more than hello.c ).

I didn't see a bug in the bugzilla. Maybe there should be one. gdb doesn't seem to have a problem with displaying the variable values so I wonder why insight has a problem.

SS

[alexeik]

Yesterday I tried to do this exercise on Ubuntu (I have .iso file for 10.4) 64 bit, but I had no time to install it on KVM. Maybe tomorrow

[SiliconSlick]

Don't waste your time... apparently Ubuntu/Debian dropped it. The thread on it (below) suggests using ddd or nemiver. Both are in the Fedora repos. The latter looks like the easiest/cleanest way to go a nice little variable window that works.

The problem seems to be that the upstream is no longer maintained and the program is built with its own internal copies of certain things, gdb being the most important part here. It has its own copy of gdb 6.8 (with current fc14 being 7.2). If you do a 'rpm -q --requires' on ddd and nemiver you'll see they use the system gdb which is going to be much more up to date.

I'm actually surprised this package is still in Fedora since the way it is currently packaged violates one of the packaging guidelines. Probably a non-trivial task to unbundle the libraries and thus the reason Debian dropped it.

Anyway, for the Ubuntu thread with details on package dependencies, why it was dropped, and ways to work around the problem, is here:

http://ubuntuforums.org/showthread.php?t=1512700

Short answer, use nemiver (or ddd).

SS

[alexeik]

OK. I got the idea.

Actually years ago I did little programming and used insight. So, that is a reason. Thanks for advice, I will switch to another debuger

Thanks again!

P.S. Tried nemiver - looks good.

[SiliconSlick]

https://bugzilla.redhat.com/show_bug.cgi?id=694890