From: Lancelot SIX via Gdb-patches <gdb-patches@sourceware.org>
To: Pedro Alves <pedro@palves.net>
Cc: gdb-patches@sourceware.org
Subject: Re: [PATCH 2/3] gdbserver/linux: Access memory even if threads are running
Date: Wed, 30 Mar 2022 13:22:11 +0000 [thread overview]
Message-ID: <20220330132033.y3w4iyuedj76rfxd@ubuntu> (raw)
In-Reply-To: <20220330124319.2804582-3-pedro@palves.net>
> +/* Helper for read_memory/write_memory using /proc/PID/mem. Because
> + we can use a single read/write call, this can be much more
> + efficient than banging away at PTRACE_PEEKTEXT. Also, unlike
> + PTRACE_PEEKTEXT/PTRACE_POKETEXT, this works with running threads.
> + One an only one of READBUF and WRITEBUF is non-null. If READBUF is
> + not null, then we're reading, otherwise we're writing. */
Hi,
Seems to me that this property can be asserted. WDYT?
Something like
gdb_assert ((readbuf == nullptr) != (writebuf == nullptr));
should do.
Best,
Lancelot.
> +
> +static int
> +proc_xfer_memory (CORE_ADDR memaddr, unsigned char *readbuf,
> + const gdb_byte *writebuf, int len)
next prev parent reply other threads:[~2022-03-30 13:22 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-30 12:43 [PATCH 0/3] gdbserver/linux: access memory while threads are running without pausing Pedro Alves
2022-03-30 12:43 ` [PATCH 1/3] gdbserver/qXfer::threads, prepare_to_access_memory=>target_pause_all Pedro Alves
2022-03-30 12:43 ` [PATCH 2/3] gdbserver/linux: Access memory even if threads are running Pedro Alves
2022-03-30 13:22 ` Lancelot SIX via Gdb-patches [this message]
2022-03-31 11:39 ` Pedro Alves
2022-04-04 14:34 ` Pedro Alves
2022-03-30 12:43 ` [PATCH 3/3] gdbserver: Eliminate prepare_to_access_memory Pedro Alves
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