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<damo22>youpi: i meant "another time" as in I was going to sleep

<damo22>:)

<damo22>youpi: heres a useful macro for kern/printf.h

<damo22>#ifdef MACH_KDB

<damo22># define mach_printf(fmt, ...) printf(fmt, ##__VA_ARGS__)

<damo22>#else

<damo22># define mach_printf(fmt, ...)

<damo22>#endif

<damo22>but i think it only works for inside mach

<damo22>youpi: ive dropped to db> from a mach deallocate, what do i look for?

<damo22>0x01273580 in mach_msg_server_timeout () from /lib/i386-gnu/libc.so.0.3

<damo22>(gdb) n

<damo22>Single stepping until exit from function mach_msg_server_timeout,

<damo22>which has no line number information.

<damo22>Thread 24 received signal SIGTRAP, Trace/breakpoint trap.

<damo22>(gdb) n

<damo22>223 *devp = ports_get_right (bd);

<damo22>(gdb) s

<damo22>what is msgh_id

<damo22>im getting 2904(outp) and 2804(inp) on port 108

<damo22>which causes the deallocation bug

<damo22>i think im supposed to be using a MACH_MSG_TYPE_PORT_SEND_ONCE poly

<damo22>but i wasnt

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<damo22>that fixed the spurious messages

<damo22>but now it wont mount

<damo22> *devp = ports_get_send_right (bd); <---- i dont know what needs to go here

<damo22> *devicePoly = MACH_MSG_TYPE_PORT_SEND_ONCE;

<youpi>damo22: in kdb, use trace/u

<youpi>to print the backtrace (both kernelland and userland)

<youpi>msgh_id is the message number, see values in /usr/include/msgids

<damo22>do i just put *devp = (device_t)(&bd->somemember);

<youpi>using SEND_ONCE can't be correct

<youpi>the port you return needs to be used several times

<youpi>so it'd be either MAKE_SEND or MOVE_SEND

<youpi>again, look at what is known to work, e.g. libmachdev/net.c

<damo22>when i put SEND_ONCE it doesnt have the spurious messages

<youpi>don't set *devp like in the kernel, the mig rules are not the same

<youpi>use libmachdev/net.c

<youpi>perhaps, but most probably for a bad reason

<youpi>SEND_ONCe really doesn't make sens here

<youpi>you are giving a way to do only *one* thing on the device

<damo22>device_types.h says the polything is a SEND_ONCE

<youpi>how that?

<youpi>I don't see the word "once" in that file

<damo22>device_reply.defs sorry

<damo22>type reply_port_t = polymorphic|MACH_MSG_TYPE_PORT_SEND_ONCE

<youpi>why do you look at the reply_port?

<youpi>device_open returns a normal port, not a reply port

<damo22>ok

<youpi>make suire you resad the proper paremeters

<youpi>the reply is indeed to a reply port

<youpi>(the first parameter)

<youpi>but what is given to it is a normal port (the last parameter)

<youpi>afk

<damo22>thx

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<pep7>to whoever is developing/using GNU/Hurd, I fucking love you <3

IRC channel logs

2019-11-18.log