From: Pedro Alves <palves@redhat.com>
To: Jan Kratochvil <jan.kratochvil@redhat.com>
Cc: Doug Evans <dje@google.com>, gdb-patches@sourceware.org
Subject: Re: [commit+7.6.1] [patch] [7.6.1] Fix argv[0] symlink regression (PR 15415)
Date: Wed, 04 Sep 2013 10:48:00 -0000 [thread overview]
Message-ID: <52271009.50805@redhat.com> (raw)
In-Reply-To: <20130828180359.GB4770@host2.jankratochvil.net>
It seems this patch introduces some output inconsistency
(only tried mainline):
$ ./gdb
...
(gdb) file ./gdb
Reading symbols from /home/pedro/gdb/mygit/build/gdb/gdb...done.
Setting up the environment for debugging gdb.
(top-gdb) info inferiors
Num Description Executable
* 1 <null> /home/pedro/gdb/mygit/build/gdb/./gdb
(top-gdb)
Note "gdb/gdb" vs "gdb/./gdb".
(top-gdb) file gdbserver/../gdb
Load new symbol table from "/home/pedro/gdb/mygit/build/gdb/gdb"? (y or n) y
Reading symbols from /home/pedro/gdb/mygit/build/gdb/gdb...done.
(top-gdb) info inferiors
Num Description Executable
* 1 <null> /home/pedro/gdb/mygit/build/gdb/gdbserver/../gdb
(top-gdb)
Note ".../gdb/gdb" vs ".../gdb/gdbserver/../gdb".
I tried your new series at
<https://sourceware.org/ml/gdb-patches/2013-08/msg00837.html>, and
seems there's still some inconsistency:
(gdb) file ./gdb
Reading symbols from /home/pedro/gdb/mygit/build/gdb/./gdb...done.
Setting up the environment for debugging gdb.
(top-gdb) info inferiors
Num Description Executable
* 1 <null> /home/pedro/gdb/mygit/build/gdb/./gdb
(top-gdb) info files
Symbols from "/home/pedro/gdb/mygit/build/gdb/./gdb".
Local exec file:
`/home/pedro/gdb/mygit/build/gdb/./gdb', file type elf64-x86-64.
This one's consistent now, but then this one's odd:
(top-gdb) file gdbserver/../gdb
Load new symbol table from "/home/pedro/gdb/mygit/build/gdb/./gdb"? (y or n) y
Reading symbols from /home/pedro/gdb/mygit/build/gdb/./gdb...done.
(top-gdb) info inferiors
Num Description Executable
* 1 <null> /home/pedro/gdb/mygit/build/gdb/gdbserver/../gdb
(top-gdb)
Hmm. It seems to only happen after having loaded "./gdb" first. This
sounds like related to the filename handling in the gdb/bfd cache? GDB
finds reuses the same bfd (as gdbserver/../gdb is the same file as
the previous ./gdb), and then we printing the filename that had
been associated with the bfd before, instead of the one that was
specified in the second "file" ?
--
Pedro Alves
next prev parent reply other threads:[~2013-09-04 10:48 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-26 18:21 Jan Kratochvil
2013-08-26 20:29 ` Doug Evans
2013-08-27 14:09 ` Jan Kratochvil
2013-08-28 16:50 ` Doug Evans
2013-08-28 18:04 ` [commit+7.6.1] " Jan Kratochvil
2013-09-04 10:48 ` Pedro Alves [this message]
2013-09-04 16:31 ` Doug Evans
2013-09-04 16:55 ` Pedro Alves
2013-09-04 19:13 ` Jan Kratochvil
2013-09-04 16:46 ` Yufeng Zhang
2013-09-04 16:53 ` Jan Kratochvil
2013-09-04 17:28 ` Yufeng Zhang
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