From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <pengyu.ut@gmail.com>
Received: from mail-io1-xd33.google.com (mail-io1-xd33.google.com
 [IPv6:2607:f8b0:4864:20::d33])
 by sourceware.org (Postfix) with ESMTPS id 2C3623858C27
 for <gdb@sourceware.org>; Mon, 25 Jan 2021 00:07:01 +0000 (GMT)
DMARC-Filter: OpenDMARC Filter v1.3.2 sourceware.org 2C3623858C27
Received: by mail-io1-xd33.google.com with SMTP id n2so23181855iom.7
 for <gdb@sourceware.org>; Sun, 24 Jan 2021 16:07:01 -0800 (PST)
X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
 d=1e100.net; s=20161025;
 h=x-gm-message-state:mime-version:from:date:message-id:subject:to;
 bh=6ckmonAOx/vIUffjwnWmuHTWNyYOpRGU32hgVMcKcWE=;
 b=osnn83ka+VXmEFtXTQWE8843euP/4rtntqtiT+agpr4EFbH6ceH0aA0UtsvcQNKasv
 PmXxqLYYgVaCcKU46B6YV6uLDiRh7dzvhEeOqj7g2/mosDSxZzykzLwnl/PxI41KHgwH
 CtEJB1vRfOWyI3ze+wc0NAD2jJk/zEcMZSvBp1xO6hOKq+/svmfjBokgaiXTO/89ci8A
 jzPDoB7qenISJJZDHT+TXJNNQxpZ5RvEksBFY9MfSyJkX34SY53wJL6wpbyoz3ps8zGw
 kJgCqjmKxWzCw2kSsG9Vd7YzqQs3hOXJuCCbO6ahXYAGezS/V+d6xAURAXlSEjtibwRu
 SxHg==
X-Gm-Message-State: AOAM530Zg5uJpZt226cWuCicxZ/yBQqp7UoOvdDL/hol1tiZ355DFSmy
 Mg6Y5hudxVeOIAobtBxUSvy0DlnLwWSUtTnHO3SeAPHF8c4=
X-Google-Smtp-Source: ABdhPJxSeCqzNJdfk9wtLYtyBbliAcNdBVvlfIxYw9rvPKw+yqp78MhQspIXGgQ2k1w89qS1L6eZy0HYskS53rZdGPo=
X-Received: by 2002:a05:6e02:1564:: with SMTP id
 k4mr168631ilu.282.1611533220417; 
 Sun, 24 Jan 2021 16:07:00 -0800 (PST)
MIME-Version: 1.0
Received: by 2002:a6b:c88b:0:0:0:0:0 with HTTP; Sun, 24 Jan 2021 16:07:00
 -0800 (PST)
From: Peng Yu <pengyu.ut@gmail.com>
Date: Sun, 24 Jan 2021 18:07:00 -0600
Message-ID: <CABrM6w=M9-Co2tsG_j7sWEc4XseRWfZX0NmFBYknYiTR6KJHfg@mail.gmail.com>
Subject: Why gdb may not terminate in batch mode?
To: gdb@sourceware.org
Content-Type: text/plain; charset="UTF-8"
X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00, DKIM_SIGNED,
 DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FREEMAIL_FROM, KAM_SHORT,
 RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS,
 TXREP autolearn=ham autolearn_force=no version=3.4.2
X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on
 server2.sourceware.org
X-BeenThere: gdb@sourceware.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Gdb mailing list <gdb.sourceware.org>
List-Unsubscribe: <https://sourceware.org/mailman/options/gdb>,
 <mailto:gdb-request@sourceware.org?subject=unsubscribe>
List-Archive: <https://sourceware.org/pipermail/gdb/>
List-Post: <mailto:gdb@sourceware.org>
List-Help: <mailto:gdb-request@sourceware.org?subject=help>
List-Subscribe: <https://sourceware.org/mailman/listinfo/gdb>,
 <mailto:gdb-request@sourceware.org?subject=subscribe>
X-List-Received-Date: Mon, 25 Jan 2021 00:07:02 -0000

Hi,

I see that gdb sometimes hangs with --batch enabled. Does anybody know
how to fix the problem? Thanks.

$ cat main.c
#include <stdio.h>

int main() {
	printf("Hello World!");
}

$ cat > gdb_cmd.txt <<EOF
run
quit
EOF

$ gcc -o main.exe main.c
$ gdb --batch --command=gdb_cmd.txt --args main.exe # Sometimes, this
command hangs
[New Thread 0x2b03 of process 97381]

$ gdb --version
GNU gdb (GDB) 10.1
Copyright (C) 2020 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
$ gcc --version
Configured with:
--prefix=/Applications/Xcode.app/Contents/Developer/usr
--with-gxx-include-dir=/usr/include/c++/4.2.1
Apple clang version 12.0.0 (clang-1200.0.32.28)
Target: x86_64-apple-darwin19.6.0
Thread model: posix
InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin

-- 
Regards,
Peng