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Re: time to workaround libc/13097 in fsf gdb?
- From: Pedro Alves <palves at redhat dot com>
- To: Jan Kratochvil <jan dot kratochvil at redhat dot com>
- Cc: Doug Evans <xdje42 at gmail dot com>, "gdb-patches at sourceware dot org" <gdb-patches at sourceware dot org>
- Date: Fri, 12 Sep 2014 13:46:23 +0100
- Subject: Re: time to workaround libc/13097 in fsf gdb?
- Authentication-results: sourceware.org; auth=none
- References: <CAP9bCMRko50FiANwa+h2FadG-k6Me69N04F+Le-bUnTVLQYKuQ at mail dot gmail dot com> <5411CFAE dot 7040805 at redhat dot com> <20140912115452 dot GA5626 at host2 dot jankratochvil dot net> <5412E3AC dot 80203 at redhat dot com> <20140912123320 dot GA8704 at host2 dot jankratochvil dot net>
On 09/12/2014 01:33 PM, Jan Kratochvil wrote:
> On Fri, 12 Sep 2014 14:14:36 +0200, Pedro Alves wrote:
>> I was more inclined to leave the vdso in the shared library list
>> though, like ldd does, than filtering it out. Like, similar to
>> your gdbarch_solib_file_not_found_is_ok patch, but look at the
>> addresses rather than filenames in the hook. I'm not sure
>> whether that'd complicate things too much.
> Everything can be done but this is again changing a direction/behavior of GDB
> upon receiving a fix of current behavior. So far GDB has not been including
> vDSO in the library list and the patch was fixing that behavior. One can go
> very far from doing one fix up to rewriting GDB from scratch.
I think that's a bit uncalled for and unfair -- AIUI, your original patch
even did that; it left vdso.so in the list.
I had said:
"Alternatively to hard coding the names, maybe we could match the vdso address
found through that with the addresses found iterating the dynamic linker list, to
know which dynamic linker entry is the vdso."
And your new patch said:
"But now it discards any shared libraries which match a symbol file loaded via
add-symbol-file-from-memory. Which may be OK but it is more widespread change
I was only clarifying what I had already said in the message
you replied to. I have no idea what problems you found in
the original patch that led to redesigning the patch to filter
out instead, or what you saw that would suggest that doing that
change would require tilting so much in the "rewriting GDB from