1153933228
Formerly rump kernels treated the two types of mutexes as both adaptive for LOCKDEBUG for some reasons. Now we can detect violations of mutex restrictions on rump kernels such as taking an adaptive mutex with holding a spin mutex as well as normal kernels.
335 lines
5.3 KiB
C
335 lines
5.3 KiB
C
/* $NetBSD: rumpuser_pth_dummy.c,v 1.18 2017/12/27 09:01:53 ozaki-r Exp $ */
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/*
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* Copyright (c) 2009 Antti Kantee. All Rights Reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "rumpuser_port.h"
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#if !defined(lint)
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__RCSID("$NetBSD: rumpuser_pth_dummy.c,v 1.18 2017/12/27 09:01:53 ozaki-r Exp $");
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#endif /* !lint */
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#include <sys/time.h>
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#include <assert.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdint.h>
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#include <time.h>
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#include <rump/rumpuser.h>
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#include "rumpuser_int.h"
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static struct lwp *curlwp;
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struct rumpuser_cv {};
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struct rumpuser_mtx {
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int v;
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struct lwp *o;
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};
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struct rumpuser_rw {
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int v;
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};
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void
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rumpuser__thrinit(void)
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{
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return;
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}
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/*ARGSUSED*/
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int
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rumpuser_thread_create(void *(*f)(void *), void *arg, const char *thrname,
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int joinable, int pri, int cpuidx, void **tptr)
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{
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fprintf(stderr, "rumpuser: threads not available\n");
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abort();
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return 0;
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}
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void
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rumpuser_thread_exit(void)
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{
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fprintf(stderr, "rumpuser: threads not available\n");
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abort();
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}
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int
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rumpuser_thread_join(void *p)
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{
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return 0;
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}
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void
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rumpuser_mutex_init(struct rumpuser_mtx **mtx, int flgas)
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{
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*mtx = calloc(1, sizeof(struct rumpuser_mtx));
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}
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int
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rumpuser_mutex_spin_p(struct rumpuser_mtx *mtx)
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{
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return false; /* XXX */
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}
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void
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rumpuser_mutex_enter(struct rumpuser_mtx *mtx)
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{
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mtx->v++;
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mtx->o = curlwp;
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}
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void
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rumpuser_mutex_enter_nowrap(struct rumpuser_mtx *mtx)
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{
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rumpuser_mutex_enter(mtx);
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}
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int
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rumpuser_mutex_tryenter(struct rumpuser_mtx *mtx)
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{
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mtx->v++;
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return 0;
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}
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void
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rumpuser_mutex_exit(struct rumpuser_mtx *mtx)
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{
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assert(mtx->v > 0);
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if (--mtx->v == 0)
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mtx->o = NULL;
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}
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void
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rumpuser_mutex_destroy(struct rumpuser_mtx *mtx)
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{
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free(mtx);
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}
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void
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rumpuser_mutex_owner(struct rumpuser_mtx *mtx, struct lwp **lp)
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{
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*lp = mtx->o;
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}
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void
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rumpuser_rw_init(struct rumpuser_rw **rw)
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{
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*rw = calloc(1, sizeof(struct rumpuser_rw));
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}
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void
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rumpuser_rw_enter(int enum_rumprwlock, struct rumpuser_rw *rw)
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{
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enum rumprwlock lk = enum_rumprwlock;
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switch (lk) {
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case RUMPUSER_RW_WRITER:
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rw->v++;
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assert(rw->v == 1);
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break;
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case RUMPUSER_RW_READER:
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assert(rw->v <= 0);
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rw->v--;
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break;
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}
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}
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int
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rumpuser_rw_tryenter(int enum_rumprwlock, struct rumpuser_rw *rw)
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{
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rumpuser_rw_enter(enum_rumprwlock, rw);
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return 0;
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}
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void
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rumpuser_rw_exit(struct rumpuser_rw *rw)
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{
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if (rw->v > 0) {
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assert(rw->v == 1);
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rw->v--;
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} else {
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rw->v++;
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}
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}
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void
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rumpuser_rw_destroy(struct rumpuser_rw *rw)
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{
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free(rw);
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}
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void
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rumpuser_rw_held(int enum_rumprwlock, struct rumpuser_rw *rw, int *rvp)
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{
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enum rumprwlock lk = enum_rumprwlock;
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switch (lk) {
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case RUMPUSER_RW_WRITER:
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*rvp = rw->v > 0;
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break;
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case RUMPUSER_RW_READER:
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*rvp = rw->v < 0;
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break;
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}
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}
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void
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rumpuser_rw_downgrade(struct rumpuser_rw *rw)
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{
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assert(rw->v == 1);
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rw->v = -1;
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}
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int
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rumpuser_rw_tryupgrade(struct rumpuser_rw *rw)
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{
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if (rw->v == -1) {
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rw->v = 1;
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return 0;
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}
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return EBUSY;
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}
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/*ARGSUSED*/
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void
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rumpuser_cv_init(struct rumpuser_cv **cv)
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{
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}
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/*ARGSUSED*/
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void
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rumpuser_cv_destroy(struct rumpuser_cv *cv)
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{
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}
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/*ARGSUSED*/
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void
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rumpuser_cv_wait(struct rumpuser_cv *cv, struct rumpuser_mtx *mtx)
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{
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}
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/*ARGSUSED*/
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void
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rumpuser_cv_wait_nowrap(struct rumpuser_cv *cv, struct rumpuser_mtx *mtx)
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{
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}
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/*ARGSUSED*/
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int
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rumpuser_cv_timedwait(struct rumpuser_cv *cv, struct rumpuser_mtx *mtx,
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int64_t sec, int64_t nsec)
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{
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struct timespec ts;
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/*LINTED*/
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ts.tv_sec = sec;
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/*LINTED*/
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ts.tv_nsec = nsec;
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nanosleep(&ts, NULL);
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return 0;
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}
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/*ARGSUSED*/
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void
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rumpuser_cv_signal(struct rumpuser_cv *cv)
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{
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}
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/*ARGSUSED*/
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void
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rumpuser_cv_broadcast(struct rumpuser_cv *cv)
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{
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}
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/*ARGSUSED*/
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void
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rumpuser_cv_has_waiters(struct rumpuser_cv *cv, int *rvp)
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{
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*rvp = 0;
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}
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/*
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* curlwp
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*/
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void
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rumpuser_curlwpop(int enum_rumplwpop, struct lwp *l)
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{
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enum rumplwpop op = enum_rumplwpop;
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switch (op) {
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case RUMPUSER_LWP_CREATE:
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case RUMPUSER_LWP_DESTROY:
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break;
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case RUMPUSER_LWP_SET:
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curlwp = l;
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break;
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case RUMPUSER_LWP_CLEAR:
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assert(curlwp == l);
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curlwp = NULL;
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break;
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}
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}
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struct lwp *
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rumpuser_curlwp(void)
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{
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return curlwp;
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}
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