* [9fans] debugging threads
@ 2006-03-03 19:18 andrey mirtchovski
2006-03-03 20:16 ` Russ Cox
0 siblings, 1 reply; 2+ messages in thread
From: andrey mirtchovski @ 2006-03-03 19:18 UTC (permalink / raw)
To: Fans of the OS Plan 9 from Bell Labs
how does one set a breakpoint in a process started with proccreate? say i have:
someproc()
{
recv(chan, x);
somefunc(x);
}
threadmain()
{
proccreate(someproc,...);
do_something();
send(chan, somex);
....
}
i want to break just before the call to 'somefunc()' in the process
executing someproc()
i'm trying with:
acid: bpset(do_something)
acid: cont()
/* bp reached */
acid: threads()
/* see pid of someproc */
acid: setproc(pid)
acid: bpset(somefunc)
and here i get 'waiting...' but i can't go back to the main thread and
do a cont(), so the send() never happens...
please unleash your knowledge upon me.
thanks.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [9fans] debugging threads
2006-03-03 19:18 [9fans] debugging threads andrey mirtchovski
@ 2006-03-03 20:16 ` Russ Cox
0 siblings, 0 replies; 2+ messages in thread
From: Russ Cox @ 2006-03-03 20:16 UTC (permalink / raw)
To: 9fans
Acid is not so great at debugging multiple processes.
Better than gdb, but not great.
I would try starting a second acid for the new proc
instead of using setproc in the current one.
If you do this, I'm not 100% sure you'll be able to
run procs() (or threads()) in either one, though.
Russ
^ permalink raw reply [flat|nested] 2+ messages in thread
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2006-03-03 19:18 [9fans] debugging threads andrey mirtchovski
2006-03-03 20:16 ` Russ Cox
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