Re: [PATCH 1/4] gdb/elfread: add debug output for GNU ifunc resolution

[Simon Marchi <simark@simark.ca>]

On 2026-02-13 13:27, Kevin Buettner wrote:
> On Fri, 13 Feb 2026 00:38:48 -0500
> simon.marchi@polymtl.ca wrote:
> 
>> From: Simon Marchi <simon.marchi@polymtl.ca>
>>
>> Add some debug prints throughout the ifunc resolution code, to be able
>> to better understand what GDB does.  Add the new "set debug gnu-ifunc"
>> knob to control it.
>>
>> Add the debug_prefixed_printf_cond_func macro to implement
>> gnu_ifunc_debug_printf_func, that takes an explicit function name.  This
>> is needed to avoid showing "operator()" as the function name in the
>> debug message.
>>
>> Here is a sample session with the new debug output enabled.
>>
> [...]
>> ---
>>  gdb/NEWS                  |   4 ++
>>  gdb/doc/gdb.texinfo       |   6 +++
>>  gdb/elfread.c             | 110 +++++++++++++++++++++++++++++++++++---
>>  gdbsupport/common-debug.h |   9 ++++
>>  4 files changed, 123 insertions(+), 6 deletions(-)
> 
> This would have been helpful when I was debugging some ifunc related
> problems last year.

Glad to know that, I hope it will be useful in the future.

> I've looked over all four parts.  They all LGTM.
> 
> Approved-by: Kevin Buettner <kevinb@redhat.com>

Thanks, I pushed the series.  I can work on Eli's request to clarify
ifunc in the doc as a separate patch.

Simon