diff options
| author | pooka <pooka@NetBSD.org> | 2014-12-16 20:05:54 +0000 |
|---|---|---|
| committer | pooka <pooka@NetBSD.org> | 2014-12-16 20:05:54 +0000 |
| commit | bc59b09d1a686ba7cf74307c2ff244ba6a094cf6 (patch) | |
| tree | fd43f80c26325ccf4590175694c5191500a08b39 /lib/libpthread/pthread_makelwp.h | |
| parent | b3ead97fcc4f83d232e3b3e669a4728a8d2ebc62 (diff) | |
Allow for arbitrary MI scheduler implementations.
A concrete result is enabling unpatched libpthread to run on the
rumprun stacks (e.g. Xen and bare metal) with a non-NetBSD scheduler.
Those schedulers hook into the existing _lwp_frobnitz() NetBSD syscall
interfaces (well, "syscall" interfaces in that scenario ;)
More specifically about the change itself:
1) instead of calling _lwp_makecontext() followed by _lwp_create()
and passing the entry point in ucontext_t (MD) through the calls, roll
the calls into pthread__makelwp() and allow alternate implementations
for that MI interface.
2) allow compile-time overriding of __lwp_gettcb_fast() or
__lwp_getprivate_fast, which are inline and leak MD scheduler/thread
details into libpthread
Additionally, two small nits:
I) define LIB=pthread before including mk.conf so that it's possible
to test for LIB==pthread in mk.conf
II) make it possible to leave out pthread_cancelstub.c. This is required
by the current implementation of rumprun-posix (i.e. rumprun on
POSIX hosts) due to symbol collisions. It needs to be fixed properly
some day, but for now allows an almost-correct libpthread to run.
I am sure @justin will be happy to explain the details ;)
no change to NetBSD
tested: anita+atf
Diffstat (limited to 'lib/libpthread/pthread_makelwp.h')
| -rw-r--r-- | lib/libpthread/pthread_makelwp.h | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/lib/libpthread/pthread_makelwp.h b/lib/libpthread/pthread_makelwp.h new file mode 100644 index 00000000000..27b79ba075f --- /dev/null +++ b/lib/libpthread/pthread_makelwp.h @@ -0,0 +1,46 @@ +/* $NetBSD: pthread_makelwp.h,v 1.1 2014/12/16 20:05:54 pooka Exp $ */ + +/*- + * Copyright (c) 2001, 2002, 2003, 2006, 2007, 2008 The NetBSD Foundation, Inc. + * All rights reserved. + * + * This code is derived from software contributed to The NetBSD Foundation + * by Nathan J. Williams and Andrew Doran. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS + * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED + * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR + * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS + * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef _LIB_PTHREAD_MAKELWP_H_ +#define _LIB_PTHREAD_MAKELWP_H_ + +#include <sys/param.h> + +#include <lwp.h> + +/* for PTHREAD_HIDE */ +#include <pthread.h> +#include "pthread_int.h" + +int pthread__makelwp(void (*)(void *), void *, void *, void *, size_t, + unsigned long, lwpid_t *) PTHREAD_HIDE; + +#endif /* _LIB_PTHREAD_MAKELWP_H_ */ |
