Is this a gcc, gdb or readelf bug?
Nick Clifton
nickc@redhat.com
Wed Dec 22 11:09:00 GMT 2004
Hi H. J.
> I can't debug gcc 4.0 with gdb:
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19124
Note - I have just committed a patch to readelf to make its output
slightly more helpful when it encounters problems like this.
The 19124 bug is definitely a GCC problem - readelf is just reporting
the facts, and as Andrew Pinkski has reported if you compile with
-fno-var-tracking the problem goes away.
> When I used idb, I got
>
> (idb) stop in tls_symbolic_operand
>
> Info: Optimized variables show as <no value> when no location is
> allocated.
> [#1: stop in int tls_symbolic_operand(rtx, enum machine_mode)]
> (idb) r
>
> Is that a gdb/readelf or gcc bug?
GDB not being able to debug GCC is a GDB problem. (Or possibly a
problem of the compiler than was used to compile the GCC being
debugged). Either way I am pretty sure that readelf is blameless in
this situation.
Cheers
Nick
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