sys/kern/kern_kinfo.c

   1 /*-
   2  * Copyright (c) 2007 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Simon 'corecode' Schubert <corecode@fs.ei.tum.de>
   6  * by Thomas E. Spanjaard <tgen@netphreax.net>
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the
  17  *    distribution.
  18  * 3. Neither the name of The DragonFly Project nor the names of its
  19  *    contributors may be used to endorse or promote products derived
  20  *    from this software without specific, prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  24  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  25  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  26  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  27  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  28  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  29  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  30  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  31  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  32  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  */
  35
  36 /*
  37  * This is a source file used by both the kernel and libkvm.
  38  */
  39
  40 #ifndef _KERNEL
  41 #define _KERNEL_STRUCTURES
  42 #endif
  43
  44 #include <sys/proc.h>
  45 #include <vm/vm_map.h>
  46 #include <sys/kinfo.h>
  47 #include <sys/tty.h>
  48 #include <sys/conf.h>
  49 #include <sys/jail.h>
  50 #include <sys/mplock2.h>
  51 #include <sys/globaldata.h>
  52 #ifdef _KERNEL
  53 #include <sys/systm.h>
  54 #else
  55 #include <string.h>
  56
  57 dev_t dev2udev(cdev_t dev);     /* kvm_proc.c */
  58 #endif
  59
  60
  61 /*
  62  * Fill in a struct kinfo_proc.
  63  *
  64  * NOTE!  We may be asked to fill in kinfo_proc for a zombied process, and
  65  * the process may be in the middle of being deallocated.  Check all pointers
  66  * for NULL.
  67  *
  68  * Caller must hold p->p_token
  69  */
  70 void
  71 fill_kinfo_proc(struct proc *p, struct kinfo_proc *kp)
  72 {
  73         struct session *sess;
  74         struct pgrp *pgrp;
  75         struct vmspace *vm;
  76
  77         pgrp = p->p_pgrp;
  78         sess = pgrp ? pgrp->pg_session : NULL;
  79
  80         bzero(kp, sizeof(*kp));
  81
  82         kp->kp_paddr = (uintptr_t)p;
  83         kp->kp_fd = (uintptr_t)p->p_fd;
  84
  85         kp->kp_flags = p->p_flags;
  86         kp->kp_stat = p->p_stat;
  87         kp->kp_lock = p->p_lock;
  88         kp->kp_acflag = p->p_acflag;
  89         kp->kp_traceflag = p->p_traceflag;
  90         kp->kp_siglist = p->p_siglist;
  91         if (p->p_sigacts) {
  92                 kp->kp_sigignore = p->p_sigignore;      /* p_sigacts-> */
  93                 kp->kp_sigcatch = p->p_sigcatch;        /* p_sigacts-> */
  94                 kp->kp_sigflag = p->p_sigacts->ps_flag;
  95         }
  96         kp->kp_start = p->p_start;
  97
  98         strncpy(kp->kp_comm, p->p_comm, sizeof(kp->kp_comm) - 1);
  99         kp->kp_comm[sizeof(kp->kp_comm) - 1] = 0;
 100
 101         if (p->p_ucred) {
 102                 kp->kp_uid = p->p_ucred->cr_uid;
 103                 kp->kp_ngroups = p->p_ucred->cr_ngroups;
 104                 if (p->p_ucred->cr_groups) {
 105                         bcopy(p->p_ucred->cr_groups, kp->kp_groups,
 106                               NGROUPS * sizeof(kp->kp_groups[0]));
 107                 }
 108                 kp->kp_ruid = p->p_ucred->cr_ruid;
 109                 kp->kp_svuid = p->p_ucred->cr_svuid;
 110                 kp->kp_rgid = p->p_ucred->cr_rgid;
 111                 kp->kp_svgid = p->p_ucred->cr_svgid;
 112         }
 113
 114         kp->kp_pid = p->p_pid;
 115         if (p->p_oppid != 0)
 116                 kp->kp_ppid = p->p_oppid;
 117         else
 118                 kp->kp_ppid = p->p_pptr != NULL ? p->p_pptr->p_pid : -1;
 119         if (pgrp) {
 120                 kp->kp_pgid = pgrp->pg_id;
 121                 kp->kp_jobc = pgrp->pg_jobc;
 122         }
 123         if (sess) {
 124                 kp->kp_sid = sess->s_sid;
 125                 bcopy(sess->s_login, kp->kp_login, MAXLOGNAME);
 126                 if (sess->s_ttyvp != NULL)
 127                         kp->kp_auxflags |= KI_CTTY;
 128                 if ((p->p_session != NULL) && SESS_LEADER(p))
 129                         kp->kp_auxflags |= KI_SLEADER;
 130         }
 131         if (sess && (p->p_flags & P_CONTROLT) != 0 && sess->s_ttyp != NULL) {
 132                 kp->kp_tdev = dev2udev(sess->s_ttyp->t_dev);
 133                 if (sess->s_ttyp->t_pgrp != NULL)
 134                         kp->kp_tpgid = sess->s_ttyp->t_pgrp->pg_id;
 135                 else
 136                         kp->kp_tpgid = -1;
 137                 if (sess->s_ttyp->t_session != NULL)
 138                         kp->kp_tsid = sess->s_ttyp->t_session->s_sid;
 139                 else
 140                         kp->kp_tsid = -1;
 141         } else {
 142                 kp->kp_tdev = NOUDEV;
 143         }
 144         kp->kp_exitstat = p->p_xstat;
 145         kp->kp_nthreads = p->p_nthreads;
 146         kp->kp_nice = p->p_nice;
 147         kp->kp_swtime = p->p_swtime;
 148
 149         if ((vm = p->p_vmspace) != NULL) {
 150                 kp->kp_vm_map_size = vm->vm_map.size;
 151                 kp->kp_vm_rssize = vmspace_resident_count(vm);
 152 #ifdef _KERNEL
 153                 /*XXX MP RACES */
 154                 /*kp->kp_vm_prssize = vmspace_president_count(vm);*/
 155 #endif
 156                 kp->kp_vm_swrss = vm->vm_swrss;
 157                 kp->kp_vm_tsize = vm->vm_tsize;
 158                 kp->kp_vm_dsize = vm->vm_dsize;
 159                 kp->kp_vm_ssize = vm->vm_ssize;
 160         }
 161
 162         if (p->p_ucred && jailed(p->p_ucred))
 163                 kp->kp_jailid = p->p_ucred->cr_prison->pr_id;
 164
 165         kp->kp_ru = p->p_ru;
 166         kp->kp_cru = p->p_cru;
 167 }
 168
 169 /*
 170  * Fill in a struct kinfo_lwp.
 171  */
 172 void
 173 fill_kinfo_lwp(struct lwp *lwp, struct kinfo_lwp *kl)
 174 {
 175         bzero(kl, sizeof(*kl));
 176
 177         kl->kl_pid = lwp->lwp_proc->p_pid;
 178         kl->kl_tid = lwp->lwp_tid;
 179
 180         kl->kl_flags = lwp->lwp_flags;
 181         kl->kl_stat = lwp->lwp_stat;
 182         kl->kl_lock = lwp->lwp_lock;
 183         kl->kl_tdflags = lwp->lwp_thread->td_flags;
 184
 185         /*
 186          * The process/lwp stat may not reflect whether the process is
 187          * actually sleeping or not if the related thread was directly
 188          * descheduled by LWKT.  Adjust the stat if the thread is not
 189          * runnable and not waiting to be scheduled on a cpu by the
 190          * user process scheduler.
 191          */
 192         if (kl->kl_stat == LSRUN) {
 193                 if ((kl->kl_tdflags & TDF_RUNQ) == 0 &&
 194                     (lwp->lwp_mpflags & LWP_MP_ONRUNQ) == 0) {
 195                         kl->kl_stat = LSSLEEP;
 196                 }
 197         }
 198 #ifdef _KERNEL
 199         kl->kl_mpcount = get_mplock_count(lwp->lwp_thread);
 200 #else
 201         kl->kl_mpcount = 0;
 202 #endif
 203
 204         kl->kl_prio = lwp->lwp_usdata.bsd4.priority;    /* XXX TGEN dangerous assumption */
 205         kl->kl_tdprio = lwp->lwp_thread->td_pri;
 206         kl->kl_rtprio = lwp->lwp_rtprio;
 207
 208         kl->kl_uticks = lwp->lwp_thread->td_uticks;
 209         kl->kl_sticks = lwp->lwp_thread->td_sticks;
 210         kl->kl_iticks = lwp->lwp_thread->td_iticks;
 211         kl->kl_cpticks = lwp->lwp_cpticks;
 212         kl->kl_pctcpu = lwp->lwp_proc->p_stat == SZOMB ? 0 : lwp->lwp_pctcpu;
 213         kl->kl_slptime = lwp->lwp_slptime;
 214         kl->kl_origcpu = lwp->lwp_usdata.bsd4.batch;
 215         kl->kl_estcpu = lwp->lwp_usdata.bsd4.estcpu;
 216         kl->kl_cpuid = lwp->lwp_thread->td_gd->gd_cpuid;
 217
 218         kl->kl_ru = lwp->lwp_ru;
 219
 220         kl->kl_siglist = lwp->lwp_siglist;
 221         kl->kl_sigmask = lwp->lwp_sigmask;
 222
 223         kl->kl_wchan = (uintptr_t)lwp->lwp_thread->td_wchan;
 224         if (lwp->lwp_thread->td_wmesg) {
 225                 strncpy(kl->kl_wmesg, lwp->lwp_thread->td_wmesg, WMESGLEN);
 226                 kl->kl_wmesg[WMESGLEN] = 0;
 227         }
 228         strlcpy(kl->kl_comm, lwp->lwp_thread->td_comm, sizeof(kl->kl_comm));
 229 }
 230
 231 /*
 232  * Fill in a struct kinfo_proc for kernel threads (i.e. those without proc).
 233  */
 234 void
 235 fill_kinfo_proc_kthread(struct thread *td, struct kinfo_proc *kp)
 236 {
 237         bzero(kp, sizeof(*kp));
 238
 239         /*
 240          * Fill in fake proc information and semi-fake lwp info.
 241          */
 242         kp->kp_pid = -1;
 243         kp->kp_tdev = NOUDEV;
 244         strncpy(kp->kp_comm, td->td_comm, sizeof(kp->kp_comm) - 1);
 245         kp->kp_comm[sizeof(kp->kp_comm) - 1] = 0;
 246         kp->kp_flags = P_SYSTEM;
 247         if (td != &td->td_gd->gd_idlethread)
 248                 kp->kp_stat = SACTIVE;
 249         else
 250                 kp->kp_stat = SIDL;
 251         kp->kp_nthreads = 1;
 252         kp->kp_ktaddr = (uintptr_t)td;
 253
 254         kp->kp_lwp.kl_pid = -1;
 255         kp->kp_lwp.kl_tid = -1;
 256         kp->kp_lwp.kl_tdflags = td->td_flags;
 257 #ifdef _KERNEL
 258         kp->kp_lwp.kl_mpcount = get_mplock_count(td);
 259 #else
 260         kp->kp_lwp.kl_mpcount = 0;
 261 #endif
 262
 263         kp->kp_lwp.kl_tdprio = td->td_pri;
 264         kp->kp_lwp.kl_rtprio.type = RTP_PRIO_THREAD;
 265         kp->kp_lwp.kl_rtprio.prio = td->td_pri;
 266
 267         kp->kp_lwp.kl_uticks = td->td_uticks;
 268         kp->kp_lwp.kl_sticks = td->td_sticks;
 269         kp->kp_lwp.kl_iticks = td->td_iticks;
 270         kp->kp_lwp.kl_cpuid = td->td_gd->gd_cpuid;
 271
 272         kp->kp_lwp.kl_wchan = (uintptr_t)td->td_wchan;
 273         if (td->td_flags & TDF_RUNQ)
 274                 kp->kp_lwp.kl_stat = LSRUN;
 275         else
 276                 kp->kp_lwp.kl_stat = LSSLEEP;
 277         if (td->td_wmesg) {
 278                 strncpy(kp->kp_lwp.kl_wmesg, td->td_wmesg, WMESGLEN);
 279                 kp->kp_lwp.kl_wmesg[WMESGLEN] = 0;
 280         }
 281         strlcpy(kp->kp_lwp.kl_comm, td->td_comm, sizeof(kp->kp_lwp.kl_comm));
 282 }