From: "Alex Bennée" <alex.bennee@linaro.org>
To: Ilya Leoshkevich <iii@linux.ibm.com>
Cc: "Warner Losh" <imp@bsdimp.com>,
"Riku Voipio" <riku.voipio@iki.fi>,
"Laurent Vivier" <laurent@vivier.eu>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Richard Henderson" <richard.henderson@linaro.org>,
"Kyle Evans" <kevans@freebsd.org>,
"Philippe Mathieu-Daudé" <philmd@linaro.org>,
qemu-devel@nongnu.org,
"Daniel P . Berrangé" <berrange@redhat.com>
Subject: Re: [PATCH v6 6/8] gdbstub: Allow late attachment
Date: Fri, 17 Jan 2025 21:22:02 +0000 [thread overview]
Message-ID: <87v7udm8zp.fsf@draig.linaro.org> (raw)
In-Reply-To: <20250117001542.8290-7-iii@linux.ibm.com> (Ilya Leoshkevich's message of "Fri, 17 Jan 2025 01:11:31 +0100")
Ilya Leoshkevich <iii@linux.ibm.com> writes:
> Allow debugging individual processes in multi-process applications by
> starting them with export QEMU_GDB=/tmp/qemu-%d.sock,suspend=n.
> Currently one would have to attach to every process to ensure the app
> makes progress.
>
> In case suspend=n is not specified, the flow remains unchanged. If it
> is specified, then accepting the client connection is delegated to a
> thread. In the future this machinery may be reused for handling
> reconnections and interruptions.
>
> On accepting a connection, the thread schedules gdb_handlesig() on the
> first CPU and wakes it up with host_interrupt_signal. Note that the
> result of this gdb_handlesig() invocation is handled, as opposed to
> many other existing call sites. These other call sites probably need to
> be fixed separately.
>
> Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
--
Alex Bennée
Virtualisation Tech Lead @ Linaro
next prev parent reply other threads:[~2025-01-17 21:22 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-01-17 0:11 [PATCH v6 0/8] gdbstub: Allow late attachment Ilya Leoshkevich
2025-01-17 0:11 ` [PATCH v6 1/8] gdbstub: Allow the %d placeholder in the socket path Ilya Leoshkevich
2025-01-17 0:11 ` [PATCH v6 2/8] gdbstub: Try unlinking the unix socket before binding Ilya Leoshkevich
2025-01-17 21:19 ` Alex Bennée
2025-01-17 0:11 ` [PATCH v6 3/8] user: Introduce user/signal.h Ilya Leoshkevich
2025-01-17 0:11 ` [PATCH v6 4/8] user: Introduce host_interrupt_signal Ilya Leoshkevich
2025-01-17 0:11 ` [PATCH v6 5/8] osdep: Introduce qemu_kill_thread() Ilya Leoshkevich
2025-01-17 0:11 ` [PATCH v6 6/8] gdbstub: Allow late attachment Ilya Leoshkevich
2025-01-17 21:22 ` Alex Bennée [this message]
2025-01-17 0:11 ` [PATCH v6 7/8] docs/user: Document the %d placeholder and suspend=n QEMU_GDB features Ilya Leoshkevich
2025-01-17 0:11 ` [PATCH v6 8/8] tests/tcg: Add late gdbstub attach test Ilya Leoshkevich
2025-01-17 21:23 ` [PATCH v6 0/8] gdbstub: Allow late attachment Alex Bennée
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