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Re: Why does "target remote" to a non-stop target stop one thread


On 06/28/2013 04:38 AM, Jeremy Bennett wrote:
hen I connect to the target, even in non-stop mode, it insists on
stopping one thread. The comment in notice_new_inferior () is:

>       /* We're going to install breakpoints, and poke at memory,
>	 ensure that the inferior is stopped for a moment while we do
>	 that.  */
My question is, why we need to stop any thread. Surely the whole point
of non-stop mode is that we don't generally want to stop any threads if
it can be avoided.

Hi Jeremy,
AFAIK, "non-stop" means when GDB is examining one stopped thread while other threads are _not stopped_.

See http://sourceware.org/gdb/onlinedocs/gdb/Non_002dStop-Mode.html#Non_002dStop-Mode

GDB needs the thread stopped because ptrace can't be performed on the running thread.

--
Yao (éå)


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