From: Tom de Vries <tdevries@suse.de>
To: gdb-patches@sourceware.org
Subject: [committed][gdb/symtab] Don't complain about function decls
Date: Tue, 4 Oct 2022 16:52:34 +0200 [thread overview]
Message-ID: <3313ea47-989c-7cc8-be31-bd04a1c52543@suse.de> (raw)
In-Reply-To: <20220909164706.GA22031@delia.home>
On 9/9/22 18:47, Tom de Vries wrote:
> Hi,
>
> [ Requires "[gdb/symtab] Don't complain about inlined functions" as
> submitted here (
> https://sourceware.org/pipermail/gdb-patches/2022-September/191762.html ). ]
>
> With the test-case included in this patch, we get:
> ...
> (gdb) ptype main^M
> During symbol reading: cannot get low and high bounds for subprogram DIE \
> at 0xc1^M
> type = int (void)^M
> (gdb) FAIL: gdb.dwarf2/anon-ns-fn.exp: ptype main without complaints
> ...
>
> The DIE causing the complaint is a function declaration:
> ...
> <2><c1>: Abbrev Number: 3 (DW_TAG_subprogram)
> <c2> DW_AT_name : foo
> <c8> DW_AT_declaration : 1
> ...
> which is referred to from the DIE representing the function definition:
> ...
> <1><f4>: Abbrev Number: 7 (DW_TAG_subprogram)
> <f5> DW_AT_specification: <0xc1>
> <f9> DW_AT_low_pc : 0x4004c7
> <101> DW_AT_high_pc : 0x7
> ...
> which does contain the low and high bounds.
>
> Fix this by not complaining about function declarations.
>
> Tested on x86_64-linux.
>
> Any comments?
>
Committed.
Thanks,
- Tom
> [gdb/symtab] Don't complain about function decls
>
> ---
> gdb/dwarf2/read.c | 4 +++-
> gdb/testsuite/gdb.dwarf2/anon-ns-fn.cc | 31 +++++++++++++++++++++++++++++++
> gdb/testsuite/gdb.dwarf2/anon-ns-fn.exp | 33 +++++++++++++++++++++++++++++++++
> 3 files changed, 67 insertions(+), 1 deletion(-)
>
> diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c
> index a8a87e36ff0..9ccb07b71ea 100644
> --- a/gdb/dwarf2/read.c
> +++ b/gdb/dwarf2/read.c
> @@ -12031,7 +12031,9 @@ read_func_scope (struct die_info *die, struct dwarf2_cu *cu)
> && attr->is_nonnegative ()
> && (attr->as_nonnegative () == DW_INL_inlined
> || attr->as_nonnegative () == DW_INL_declared_inlined));
> - if (!external_p && !inlined_p)
> + attr = dwarf2_attr (die, DW_AT_declaration, cu);
> + bool decl_p = attr != nullptr && attr->as_boolean ();
> + if (!external_p && !inlined_p && !decl_p)
> complaint (_("cannot get low and high bounds "
> "for subprogram DIE at %s"),
> sect_offset_str (die->sect_off));
> diff --git a/gdb/testsuite/gdb.dwarf2/anon-ns-fn.cc b/gdb/testsuite/gdb.dwarf2/anon-ns-fn.cc
> new file mode 100644
> index 00000000000..62a650528c4
> --- /dev/null
> +++ b/gdb/testsuite/gdb.dwarf2/anon-ns-fn.cc
> @@ -0,0 +1,31 @@
> +/* This testcase is part of GDB, the GNU debugger.
> +
> + Copyright 2022 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 <http://www.gnu.org/licenses/>. */
> +
> +namespace
> +{
> + void
> + foo (void)
> + {
> + }
> +}
> +
> +int
> +main (void)
> +{
> + foo ();
> + return 0;
> +}
> diff --git a/gdb/testsuite/gdb.dwarf2/anon-ns-fn.exp b/gdb/testsuite/gdb.dwarf2/anon-ns-fn.exp
> new file mode 100644
> index 00000000000..71b1a477a39
> --- /dev/null
> +++ b/gdb/testsuite/gdb.dwarf2/anon-ns-fn.exp
> @@ -0,0 +1,33 @@
> +# Copyright 2022 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 <http://www.gnu.org/licenses/>.
> +
> +if {[skip_cplus_tests]} { continue }
> +
> +standard_testfile .cc
> +
> +if [prepare_for_testing "failed to prepare" $testfile $srcfile {debug c++}] {
> + return -1
> +}
> +
> +set cmd "ptype main"
> +
> +set re \
> + [multi_line \
> + $cmd \
> + "type = int \\(void\\)"]
> +
> +with_complaints 5 {
> + gdb_test $cmd $re "$cmd without complaints"
> +}
prev parent reply other threads:[~2022-10-04 14:52 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-09 16:47 [PATCH][gdb/symtab] " Tom de Vries
2022-10-04 14:52 ` Tom de Vries [this message]
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