"Brent W. Baccala" <cos...@freesoft.org> writes: > On Fri, Sep 30, 2016 at 9:17 AM, Kalle Olavi Niemitalo <k...@iki.fi> wrote: > >> A future version of rpctrace might want to move receive rights >> if it were able to attach to a preexisting task. > > That's an important and interesting application that I hadn't thought of.
strace using system call tracing would not have to move most rights when attaching, would not have to requeue messages when detaching, and would not interfere with mach_port_set_qlimit. Alas, GNU Mach does not support system call tracing. (GNU Mach supports task_set_emulation_vector but that's useless for strace.) OSF Mk6.1 supports it as EXC_MACH_SYSCALL, and the license looks compatible, but merging the code might not be trivial. ftp://ftp.funet.fi/pub/mach/osfmach3/
