From patchwork Tue Jun 4 19:42:58 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tom Tromey X-Patchwork-Id: 32983 Received: (qmail 67383 invoked by alias); 4 Jun 2019 19:43:04 -0000 Mailing-List: contact gdb-patches-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Unsubscribe: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-patches-owner@sourceware.org Delivered-To: mailing list gdb-patches@sourceware.org Received: (qmail 67106 invoked by uid 89); 4 Jun 2019 19:43:04 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-23.7 required=5.0 tests=AWL, BAYES_00, GIT_PATCH_0, GIT_PATCH_1, GIT_PATCH_2, GIT_PATCH_3, KAM_SHORT, RCVD_IN_DNSWL_NONE, SPF_PASS autolearn=ham version=3.3.1 spammy=exploit X-HELO: rock.gnat.com Received: from rock.gnat.com (HELO rock.gnat.com) (205.232.38.15) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Tue, 04 Jun 2019 19:43:02 +0000 Received: from localhost (localhost.localdomain [127.0.0.1]) by filtered-rock.gnat.com (Postfix) with ESMTP id 103F5117D60; Tue, 4 Jun 2019 15:43:01 -0400 (EDT) Received: from rock.gnat.com ([127.0.0.1]) by localhost (rock.gnat.com [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 5+NbLo-ylHfM; Tue, 4 Jun 2019 15:43:01 -0400 (EDT) Received: from murgatroyd.Home (174-29-48-168.hlrn.qwest.net [174.29.48.168]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by rock.gnat.com (Postfix) with ESMTPSA id B00B7117CDF; Tue, 4 Jun 2019 15:43:00 -0400 (EDT) From: Tom Tromey To: gdb-patches@sourceware.org Cc: Tom Tromey Subject: [PATCH] Warn if add-symbol-file does not provide any symbols Date: Tue, 4 Jun 2019 13:42:58 -0600 Message-Id: <20190604194258.6520-1-tromey@adacore.com> MIME-Version: 1.0 A user suggested that add-symbol-file ought to warn if the file does not in fact provide any symbols. This seemed like a decent idea, so this patch implements this idea. Tested on x86-64 Fedora 29. gdb/ChangeLog 2019-06-04 Tom Tromey * symfile.c (add_symbol_file_command): Remove obsolete comment. Warn if symbol file does not provide any symbols. gdb/testsuite/ChangeLog 2019-06-04 Tom Tromey * gdb.base/symfile-warn.exp: New file. * gdb.base/symfile-warn.c: New file. --- gdb/ChangeLog | 5 ++++ gdb/symfile.c | 9 +++---- gdb/testsuite/ChangeLog | 5 ++++ gdb/testsuite/gdb.base/symfile-warn.c | 18 +++++++++++++ gdb/testsuite/gdb.base/symfile-warn.exp | 35 +++++++++++++++++++++++++ 5 files changed, 66 insertions(+), 6 deletions(-) create mode 100644 gdb/testsuite/gdb.base/symfile-warn.c create mode 100644 gdb/testsuite/gdb.base/symfile-warn.exp diff --git a/gdb/symfile.c b/gdb/symfile.c index af99da18f7a..e441db941c1 100644 --- a/gdb/symfile.c +++ b/gdb/symfile.c @@ -2211,12 +2211,6 @@ set_objfile_default_section_offset (struct objfile *objf, /* This function allows the addition of incrementally linked object files. It does not modify any state in the target, only in the debugger. */ -/* Note: ezannoni 2000-04-13 This function/command used to have a - special case syntax for the rombug target (Rombug is the boot - monitor for Microware's OS-9 / OS-9000, see remote-os9k.c). In the - rombug case, the user doesn't need to supply a text address, - instead a call to target_link() (in target.c) would supply the - value to use. We are now discontinuing this type of ad hoc syntax. */ static void add_symbol_file_command (const char *args, int from_tty) @@ -2358,6 +2352,9 @@ add_symbol_file_command (const char *args, int from_tty) objf = symbol_file_add (filename.get (), add_flags, §ion_addrs, flags); + if (!objfile_has_symbols (objf) && objf->per_bfd->minimal_symbol_count <= 0) + warning (_("newly-added symbol file \"%s\" does not provide any symbols"), + filename.get ()); if (seen_offset) set_objfile_default_section_offset (objf, section_addrs, offset); diff --git a/gdb/testsuite/gdb.base/symfile-warn.c b/gdb/testsuite/gdb.base/symfile-warn.c new file mode 100644 index 00000000000..38fdd671034 --- /dev/null +++ b/gdb/testsuite/gdb.base/symfile-warn.c @@ -0,0 +1,18 @@ +/* This testcase is part of GDB, the GNU debugger. + + Copyright 2019 Free Software Foundation, Inc. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see . */ + +/* Empty. */ diff --git a/gdb/testsuite/gdb.base/symfile-warn.exp b/gdb/testsuite/gdb.base/symfile-warn.exp new file mode 100644 index 00000000000..155df72aa80 --- /dev/null +++ b/gdb/testsuite/gdb.base/symfile-warn.exp @@ -0,0 +1,35 @@ +# Copyright 2019 Free Software Foundation, Inc. + +# This program is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program. If not, see . + +# Exploit formerly failed assertion in scan_dyntag when it got called for +# objfile having ".dynamic" section but without having data loaded in target. +# Such file is ${binmainfile} through add-symbol-file here. Set context first +# by "list main" to have some local BLOCK set in lookup_symbol_global. + +standard_testfile .c +set ofile [standard_output_file ${testfile}.o] + +if {[gdb_compile "${srcdir}/${subdir}/${srcfile}" \ + $ofile object {debug}] != ""} { + untested "failed to compile" + return -1 +} + +clean_restart + +gdb_test "add-symbol-file $ofile 0" \ + "Reading symbols from .*warning: newly-added symbol file.*does not provide any symbols" \ + "add-symbol-file" \ + "add symbol table from file \".*\" at.*\\(y or n\\) " "y"