From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id BB65B3858D37; Wed, 27 Dec 2023 11:22:04 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org BB65B3858D37 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1703676124; bh=1i3z8Ft4KnimHvxHewmZ4LeEQ0Ep2Srp6ehnZX70TSg=; h=From:To:Subject:Date:From; b=mNPLtxucD07IwkeQe9UnpNMb57ylmZPwEuv4ShvCt+ymnuPKhCijmiVN4k2dK/eS9 WdtBqXppe/aslfQRyPSsWq/HjTCT7vOR7wpVFSzdI65ahuokNdzlopco5nI7kNVIir kGQQzmYKXI6b1iDefBk1UKTWbZtughO9kunrrZPU= From: "klen_s at mail dot ru" To: gdb-prs@sourceware.org Subject: [Bug remote/31193] New: remote serial device read fall Date: Wed, 27 Dec 2023 11:22:02 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gdb X-Bugzilla-Component: remote X-Bugzilla-Version: HEAD X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: klen_s at mail dot ru X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: unassigned at sourceware dot org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status bug_severity priority component assigned_to reporter target_milestone attachments.created Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://sourceware.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 List-Id: https://sourceware.org/bugzilla/show_bug.cgi?id=3D31193 Bug ID: 31193 Summary: remote serial device read fall Product: gdb Version: HEAD Status: UNCONFIRMED Severity: normal Priority: P2 Component: remote Assignee: unassigned at sourceware dot org Reporter: klen_s at mail dot ru Target Milestone: --- Created attachment 15271 --> https://sourceware.org/bugzilla/attachment.cgi?id=3D15271&action=3Ded= it propsed patch After closing "Bug 30770 - serial.c does not preserve errno correctly" https://sourceware.org/bugzilla/show_bug.cgi?id=3D30770 remote debugging became impossible due to an attempt to recv() by a call intended for the socket, and not for the character device file. The documentation implicitly states that it is possible to use the read() call = to work with a socket. But this does not mean in the general case that it is permissible to use recv in the case of a non-socket. condition: os: Distributor ID: Ubuntu Description: Ubuntu 23.10 Release: 23.10 Codename: mantic libc:=20=20 ldd (Ubuntu GLIBC 2.38-1ubuntu6) 2.38 kernel: Linux klen-dev-um790pro 6.5.0-14-generic #14-Ubuntu SMP PREEMPT_DYNAMIC = Tue Nov 14 14:59:49 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux gdb: build from trank at 15.0.50.20231226-git GDB output: $ arm-kgp-eabi-gdb GNU gdb (Klen's_GNU_package_(KGP)_for_target::arm-kgp-eabi_host::x86= _64-kgp-linux-gnu_znver4-avx512<<=C3=ADlex>>) 15.0.50.20231226-git .... (gdb) tar ext /dev/ttyACM1 Remote debugging using /dev/ttyACM1 Remote communication error. Target disconnected: error while reading: Sock= et operation on non-socket. (gdb) after fix gdb work fine $ arm-kgp-eabi-gdb -q (gdb) tar ext /dev/ttyACM0 Remote debugging using /dev/ttyACM0 (gdb) mon swd Target voltage: 0.0V Available Targets: No. Att Driver 1 STM32F40x M4 (gdb) att 1 Attaching to Remote target warning: No executable has been specified and target does not support determining executable automatically. Try using the "file" command. 0x08020c80 in ?? () (gdb) propsed patch diff --git a/gdb/ser-unix.c b/gdb/ser-unix.c index 07cd8b7b5b4..57dcf6c7cf3 100644 --- a/gdb/ser-unix.c +++ b/gdb/ser-unix.c @@ -574,7 +574,7 @@ when debugging using remote targets."), int ser_unix_read_prim (struct serial *scb, size_t count) { - int result =3D recv (scb->fd, scb->buf, count, 0); + int result =3D read (scb->fd, scb->buf, count); if (result =3D=3D -1 && errno !=3D EINTR) perror_with_name ("error while reading"); return result; --=20 You are receiving this mail because: You are on the CC list for the bug.=