fcc023545e
address space available to processes. this limit exists in most other
modern unix variants, and like most of them, our defaults are unlimited.
remove the old mmap / rlimit.datasize hack.
- adds the VMCMD_STACK flag to all the stack-creation vmcmd callers.
it is currently unused, but was added a few years ago.
- add a pair of new process size values to kinfo_proc2{}. one is the
total size of the process memory map, and the other is the total size
adjusted for unused stack space (since most processes have a lot of
this...)
- patch sh, and csh to notice RLIMIT_AS. (in some cases, the alias
RLIMIT_VMEM was already present and used if availble.)
- patch ps, top and systat to notice the new k_vm_vsize member of
kinfo_proc2{}.
- update irix, svr4, svr4_32, linux and osf1 emulations to support
this information. (freebsd could be done, but that it's best left
as part of the full-update of compat/freebsd.)
this addresses PR 7897. it also gives correct memory usage values,
which have never been entirely correct (since mmap), and have been
very incorrect since jemalloc() was enabled.
tested on i386 and sparc64, build tested on several other platforms.
thanks to many folks for feedback and testing but most espcially
chuq and yamt for critical suggestions that lead to this patch not
having a special ugliness i wasn't happy with anyway :-)
293 lines
8.4 KiB
C
293 lines
8.4 KiB
C
/* $NetBSD: svr4_32_resource.c,v 1.17 2009/03/29 01:02:50 mrg Exp $ */
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/*-
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* Copyright (c) 1998 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Christos Zoulas.
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: svr4_32_resource.c,v 1.17 2009/03/29 01:02:50 mrg Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/file.h>
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#include <sys/resource.h>
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#include <sys/resourcevar.h>
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#include <machine/vmparam.h>
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#include <compat/svr4_32/svr4_32_types.h>
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#include <compat/svr4_32/svr4_32_resource.h>
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#include <compat/svr4_32/svr4_32_signal.h>
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#include <compat/svr4_32/svr4_32_lwp.h>
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#include <compat/svr4_32/svr4_32_ucontext.h>
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#include <compat/svr4_32/svr4_32_syscallargs.h>
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#include <compat/svr4_32/svr4_32_util.h>
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static inline int svr4_to_native_rl(int);
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static inline int
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svr4_to_native_rl(int rl)
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{
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switch (rl) {
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case SVR4_RLIMIT_CPU:
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return RLIMIT_CPU;
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case SVR4_RLIMIT_FSIZE:
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return RLIMIT_FSIZE;
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case SVR4_RLIMIT_DATA:
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return RLIMIT_DATA;
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case SVR4_RLIMIT_STACK:
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return RLIMIT_STACK;
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case SVR4_RLIMIT_CORE:
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return RLIMIT_CORE;
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case SVR4_RLIMIT_NOFILE:
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return RLIMIT_NOFILE;
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case SVR4_RLIMIT_VMEM:
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return RLIMIT_AS;
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default:
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return -1;
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}
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}
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/*
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* Check if the resource limit fits within the BSD range and it is not
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* one of the magic SVR4 limit values
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*/
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#define OKLIMIT(l) (((int32_t)(l)) >= 0 && ((int32_t)(l)) < 0x7fffffff && \
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((svr4_rlim_t)(l)) != SVR4_RLIM_INFINITY && \
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((svr4_rlim_t)(l)) != SVR4_RLIM_SAVED_CUR && \
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((svr4_rlim_t)(l)) != SVR4_RLIM_SAVED_MAX)
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#define OKLIMIT64(l) (((rlim_t)(l)) < RLIM_INFINITY && \
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((svr4_rlim64_t)(l)) != SVR4_RLIM64_INFINITY && \
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((svr4_rlim64_t)(l)) != SVR4_RLIM64_SAVED_CUR && \
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((svr4_rlim64_t)(l)) != SVR4_RLIM64_SAVED_MAX)
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int
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svr4_32_sys_getrlimit(struct lwp *l, const struct svr4_32_sys_getrlimit_args *uap, register_t *retval)
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{
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struct proc *p = l->l_proc;
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int rl = svr4_to_native_rl(SCARG(uap, which));
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struct rlimit blim;
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struct svr4_rlimit slim;
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if (rl == -1)
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return EINVAL;
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blim = p->p_rlimit[rl];
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/*
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* Our infinity, is their maxfiles.
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*/
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if (rl == RLIMIT_NOFILE && blim.rlim_max == RLIM_INFINITY)
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blim.rlim_max = maxfiles;
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/*
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* If the limit can be be represented, it is returned.
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* Otherwise, if rlim_cur == rlim_max, return RLIM_SAVED_MAX
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* else return RLIM_SAVED_CUR
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*/
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if (blim.rlim_max == RLIM_INFINITY)
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slim.rlim_max = SVR4_RLIM_INFINITY;
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else if (OKLIMIT(blim.rlim_max))
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slim.rlim_max = (svr4_rlim_t) blim.rlim_max;
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else
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slim.rlim_max = SVR4_RLIM_SAVED_MAX;
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if (blim.rlim_cur == RLIM_INFINITY)
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slim.rlim_cur = SVR4_RLIM_INFINITY;
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else if (OKLIMIT(blim.rlim_cur))
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slim.rlim_cur = (svr4_rlim_t) blim.rlim_cur;
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else if (blim.rlim_max == blim.rlim_cur)
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slim.rlim_cur = SVR4_RLIM_SAVED_MAX;
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else
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slim.rlim_cur = SVR4_RLIM_SAVED_CUR;
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switch (rl) {
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case RLIMIT_DATA:
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if (blim.rlim_cur > MAXDSIZ32)
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blim.rlim_cur = MAXDSIZ32;
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if (blim.rlim_max > MAXDSIZ32)
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blim.rlim_max = MAXDSIZ32;
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break;
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case RLIMIT_STACK:
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if (blim.rlim_cur > MAXSSIZ32)
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blim.rlim_cur = MAXSSIZ32;
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if (blim.rlim_max > MAXSSIZ32)
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blim.rlim_max = MAXSSIZ32;
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default:
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break;
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}
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return copyout(&slim, SCARG_P32(uap, rlp), sizeof(slim));
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}
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int
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svr4_32_sys_setrlimit(struct lwp *l, const struct svr4_32_sys_setrlimit_args *uap, register_t *retval)
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{
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struct proc *p = l->l_proc;
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int rl = svr4_to_native_rl(SCARG(uap, which));
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struct rlimit blim, *limp;
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struct svr4_rlimit slim;
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int error;
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if (rl == -1)
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return EINVAL;
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limp = &p->p_rlimit[rl];
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if ((error = copyin(SCARG_P32(uap, rlp), &slim,
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sizeof(slim))) != 0)
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return error;
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/*
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* if the limit is SVR4_RLIM_INFINITY, then we set it to our
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* unlimited.
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* We should also: If it is SVR4_RLIM_SAVED_MAX, we should set the
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* new limit to the corresponding saved hard limit, and if
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* it is equal to SVR4_RLIM_SAVED_CUR, we should set it to the
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* corresponding saved soft limit.
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*
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*/
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if (slim.rlim_max == SVR4_RLIM_INFINITY)
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blim.rlim_max = RLIM_INFINITY;
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else if (OKLIMIT(slim.rlim_max))
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blim.rlim_max = (rlim_t) slim.rlim_max;
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else if (slim.rlim_max == SVR4_RLIM_SAVED_MAX)
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blim.rlim_max = limp->rlim_max;
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else if (slim.rlim_max == SVR4_RLIM_SAVED_CUR)
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blim.rlim_max = limp->rlim_cur;
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if (slim.rlim_cur == SVR4_RLIM_INFINITY)
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blim.rlim_cur = RLIM_INFINITY;
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else if (OKLIMIT(slim.rlim_cur))
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blim.rlim_cur = (rlim_t) slim.rlim_cur;
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else if (slim.rlim_cur == SVR4_RLIM_SAVED_MAX)
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blim.rlim_cur = limp->rlim_max;
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else if (slim.rlim_cur == SVR4_RLIM_SAVED_CUR)
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blim.rlim_cur = limp->rlim_cur;
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return dosetrlimit(l, p, rl, &blim);
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}
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int
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svr4_32_sys_getrlimit64(struct lwp *l, const struct svr4_32_sys_getrlimit64_args *uap, register_t *retval)
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{
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struct proc *p = l->l_proc;
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int rl = svr4_to_native_rl(SCARG(uap, which));
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struct rlimit blim;
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struct svr4_rlimit64 slim;
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if (rl == -1)
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return EINVAL;
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blim = p->p_rlimit[rl];
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/*
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* Our infinity, is their maxfiles.
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*/
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if (rl == RLIMIT_NOFILE && blim.rlim_max == RLIM_INFINITY)
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blim.rlim_max = maxfiles;
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/*
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* If the limit can be be represented, it is returned.
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* Otherwise, if rlim_cur == rlim_max, return SVR4_RLIM_SAVED_MAX
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* else return SVR4_RLIM_SAVED_CUR
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*/
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if (blim.rlim_max == RLIM_INFINITY)
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slim.rlim_max = SVR4_RLIM64_INFINITY;
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else if (OKLIMIT64(blim.rlim_max))
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slim.rlim_max = (svr4_rlim64_t) blim.rlim_max;
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else
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slim.rlim_max = SVR4_RLIM64_SAVED_MAX;
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if (blim.rlim_cur == RLIM_INFINITY)
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slim.rlim_cur = SVR4_RLIM64_INFINITY;
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else if (OKLIMIT64(blim.rlim_cur))
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slim.rlim_cur = (svr4_rlim64_t) blim.rlim_cur;
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else if (blim.rlim_max == blim.rlim_cur)
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slim.rlim_cur = SVR4_RLIM64_SAVED_MAX;
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else
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slim.rlim_cur = SVR4_RLIM64_SAVED_CUR;
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return copyout(&slim, SCARG_P32(uap, rlp),
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sizeof(slim));
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}
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int
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svr4_32_sys_setrlimit64(struct lwp *l, const struct svr4_32_sys_setrlimit64_args *uap, register_t *retval)
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{
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struct proc *p = l->l_proc;
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int rl = svr4_to_native_rl(SCARG(uap, which));
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struct rlimit blim, *limp;
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struct svr4_rlimit64 slim;
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int error;
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if (rl == -1)
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return EINVAL;
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limp = &p->p_rlimit[rl];
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if ((error = copyin(SCARG_P32(uap, rlp),
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&slim, sizeof(slim))) != 0)
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return error;
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/*
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* if the limit is SVR4_RLIM64_INFINITY, then we set it to our
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* unlimited.
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* We should also: If it is SVR4_RLIM64_SAVED_MAX, we should set the
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* new limit to the corresponding saved hard limit, and if
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* it is equal to SVR4_RLIM64_SAVED_CUR, we should set it to the
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* corresponding saved soft limit.
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*
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*/
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if (slim.rlim_max == SVR4_RLIM64_INFINITY)
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blim.rlim_max = RLIM_INFINITY;
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else if (OKLIMIT64(slim.rlim_max))
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blim.rlim_max = (rlim_t) slim.rlim_max;
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else if (slim.rlim_max == SVR4_RLIM64_SAVED_MAX)
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blim.rlim_max = limp->rlim_max;
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else if (slim.rlim_max == SVR4_RLIM64_SAVED_CUR)
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blim.rlim_max = limp->rlim_cur;
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if (slim.rlim_cur == SVR4_RLIM64_INFINITY)
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blim.rlim_cur = RLIM_INFINITY;
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else if (OKLIMIT64(slim.rlim_cur))
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blim.rlim_cur = (rlim_t) slim.rlim_cur;
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else if (slim.rlim_cur == SVR4_RLIM64_SAVED_MAX)
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blim.rlim_cur = limp->rlim_max;
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else if (slim.rlim_cur == SVR4_RLIM64_SAVED_CUR)
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blim.rlim_cur = limp->rlim_cur;
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return dosetrlimit(l, p, rl, &blim);
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}
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