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htop/openbsd/OpenBSDProcessList.c

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/*
htop - OpenBSDProcessList.c
(C) 2014 Hisham H. Muhammad
(C) 2015 Michael McConville
Released under the GNU GPLv2+, see the COPYING file
in the source distribution for its full text.
*/
#include "openbsd/OpenBSDProcessList.h"
#include <kvm.h>
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/mount.h>
#include <sys/param.h>
#include <sys/proc.h>
#include <sys/sched.h>
#include <sys/swap.h>
#include <sys/sysctl.h>
#include <sys/types.h>
#include <uvm/uvmexp.h>
#include "CRT.h"
#include "Macros.h"
#include "Object.h"
#include "Process.h"
#include "ProcessList.h"
#include "Settings.h"
#include "XUtils.h"
#include "openbsd/OpenBSDProcess.h"
static long fscale;
static int pageSize;
static int pageSizeKB;
static void OpenBSDProcessList_updateCPUcount(ProcessList* super) {
OpenBSDProcessList* opl = (OpenBSDProcessList*) super;
const int nmib[] = { CTL_HW, HW_NCPU };
const int mib[] = { CTL_HW, HW_NCPUONLINE };
int r;
unsigned int value;
size_t size;
bool change = false;
size = sizeof(value);
r = sysctl(mib, 2, &value, &size, NULL, 0);
if (r < 0 || value < 1) {
value = 1;
}
if (value != super->activeCPUs) {
super->activeCPUs = value;
change = true;
}
size = sizeof(value);
r = sysctl(nmib, 2, &value, &size, NULL, 0);
if (r < 0 || value < 1) {
value = super->activeCPUs;
}
if (value != super->existingCPUs) {
opl->cpuData = xReallocArray(opl->cpuData, value + 1, sizeof(CPUData));
super->existingCPUs = value;
change = true;
}
if (change) {
CPUData* dAvg = &opl->cpuData[0];
memset(dAvg, '\0', sizeof(CPUData));
dAvg->totalTime = 1;
dAvg->totalPeriod = 1;
dAvg->online = true;
for (unsigned int i = 0; i < super->existingCPUs; i++) {
CPUData* d = &opl->cpuData[i + 1];
memset(d, '\0', sizeof(CPUData));
d->totalTime = 1;
d->totalPeriod = 1;
const int ncmib[] = { CTL_KERN, KERN_CPUSTATS, i };
struct cpustats cpu_stats;
size = sizeof(cpu_stats);
if (sysctl(ncmib, 3, &cpu_stats, &size, NULL, 0) < 0) {
CRT_fatalError("ncmib sysctl call failed");
}
d->online = (cpu_stats.cs_flags & CPUSTATS_ONLINE);
}
}
}
ProcessList* ProcessList_new(UsersTable* usersTable, Hashtable* dynamicMeters, Hashtable* dynamicColumns, Hashtable* pidMatchList, uid_t userId) {
const int fmib[] = { CTL_KERN, KERN_FSCALE };
size_t size;
char errbuf[_POSIX2_LINE_MAX];
OpenBSDProcessList* opl = xCalloc(1, sizeof(OpenBSDProcessList));
ProcessList* pl = (ProcessList*) opl;
ProcessList_init(pl, Class(OpenBSDProcess), usersTable, dynamicMeters, dynamicColumns, pidMatchList, userId);
OpenBSDProcessList_updateCPUcount(pl);
size = sizeof(fscale);
if (sysctl(fmib, 2, &fscale, &size, NULL, 0) < 0) {
CRT_fatalError("fscale sysctl call failed");
}
if ((pageSize = sysconf(_SC_PAGESIZE)) == -1)
CRT_fatalError("pagesize sysconf call failed");
pageSizeKB = pageSize / ONE_K;
opl->kd = kvm_openfiles(NULL, NULL, NULL, KVM_NO_FILES, errbuf);
if (opl->kd == NULL) {
CRT_fatalError("kvm_openfiles() failed");
}
opl->cpuSpeed = -1;
return pl;
}
void ProcessList_delete(ProcessList* this) {
OpenBSDProcessList* opl = (OpenBSDProcessList*) this;
if (opl->kd) {
kvm_close(opl->kd);
}
free(opl->cpuData);
ProcessList_done(this);
free(this);
}
static void OpenBSDProcessList_scanMemoryInfo(ProcessList* pl) {
const int uvmexp_mib[] = { CTL_VM, VM_UVMEXP };
struct uvmexp uvmexp;
size_t size_uvmexp = sizeof(uvmexp);
if (sysctl(uvmexp_mib, 2, &uvmexp, &size_uvmexp, NULL, 0) < 0) {
CRT_fatalError("uvmexp sysctl call failed");
}
pl->totalMem = uvmexp.npages * pageSizeKB;
pl->usedMem = (uvmexp.npages - uvmexp.free - uvmexp.paging) * pageSizeKB;
// Taken from OpenBSD systat/iostat.c, top/machine.c and uvm_sysctl(9)
const int bcache_mib[] = { CTL_VFS, VFS_GENERIC, VFS_BCACHESTAT };
struct bcachestats bcstats;
size_t size_bcstats = sizeof(bcstats);
if (sysctl(bcache_mib, 3, &bcstats, &size_bcstats, NULL, 0) < 0) {
CRT_fatalError("cannot get vfs.bcachestat");
}
pl->cachedMem = bcstats.numbufpages * pageSizeKB;
/*
* Copyright (c) 1994 Thorsten Lockert <tholo@sigmasoft.com>
* All rights reserved.
*
* Taken almost directly from OpenBSD's top(1)
*
* Originally released under a BSD-3 license
* Modified through htop developers applying GPL-2
*/
int nswap = swapctl(SWAP_NSWAP, 0, 0);
if (nswap > 0) {
struct swapent swdev[nswap];
int rnswap = swapctl(SWAP_STATS, swdev, nswap);
/* Total things up */
unsigned long long int total = 0, used = 0;
for (int i = 0; i < rnswap; i++) {
if (swdev[i].se_flags & SWF_ENABLE) {
used += (swdev[i].se_inuse / (1024 / DEV_BSIZE));
total += (swdev[i].se_nblks / (1024 / DEV_BSIZE));
}
}
pl->totalSwap = total;
pl->usedSwap = used;
} else {
pl->totalSwap = pl->usedSwap = 0;
}
}
static void OpenBSDProcessList_updateCwd(const struct kinfo_proc* kproc, Process* proc) {
const int mib[] = { CTL_KERN, KERN_PROC_CWD, kproc->p_pid };
char buffer[2048];
size_t size = sizeof(buffer);
if (sysctl(mib, 3, buffer, &size, NULL, 0) != 0) {
free(proc->procCwd);
proc->procCwd = NULL;
return;
}
/* Kernel threads return an empty buffer */
if (buffer[0] == '\0') {
free(proc->procCwd);
proc->procCwd = NULL;
return;
}
free_and_xStrdup(&proc->procCwd, buffer);
}
static void OpenBSDProcessList_updateProcessName(kvm_t* kd, const struct kinfo_proc* kproc, Process* proc) {
Process_updateComm(proc, kproc->p_comm);
/*
* Like OpenBSD's top(1), we try to fall back to the command name
* (argv[0]) if we fail to construct the full command.
*/
char** arg = kvm_getargv(kd, kproc, 500);
if (arg == NULL || *arg == NULL) {
Process_updateCmdline(proc, kproc->p_comm, 0, strlen(kproc->p_comm));
return;
}
size_t len = 0;
for (int i = 0; arg[i] != NULL; i++) {
len += strlen(arg[i]) + 1; /* room for arg and trailing space or NUL */
}
/* don't use xMalloc here - we want to handle huge argv's gracefully */
char* s;
if ((s = malloc(len)) == NULL) {
Process_updateCmdline(proc, kproc->p_comm, 0, strlen(kproc->p_comm));
return;
}
*s = '\0';
int start = 0;
int end = 0;
for (int i = 0; arg[i] != NULL; i++) {
size_t n = strlcat(s, arg[i], len);
if (i == 0) {
end = MINIMUM(n, len - 1);
/* check if cmdline ended earlier, e.g 'kdeinit5: Running...' */
for (int j = end; j > 0; j--) {
if (arg[0][j] == ' ' && arg[0][j - 1] != '\\') {
end = (arg[0][j - 1] == ':') ? (j - 1) : j;
}
}
}
/* the trailing space should get truncated anyway */
strlcat(s, " ", len);
}
Process_updateCmdline(proc, s, start, end);
free(s);
}
/*
* Taken from OpenBSD's ps(1).
*/
static double getpcpu(const struct kinfo_proc* kp) {
if (fscale == 0)
return 0.0;
return 100.0 * (double)kp->p_pctcpu / fscale;
}
static void OpenBSDProcessList_scanProcs(OpenBSDProcessList* this) {
const Settings* settings = this->super.settings;
const bool hideKernelThreads = settings->hideKernelThreads;
const bool hideUserlandThreads = settings->hideUserlandThreads;
int count = 0;
const struct kinfo_proc* kprocs = kvm_getprocs(this->kd, KERN_PROC_KTHREAD | KERN_PROC_SHOW_THREADS, 0, sizeof(struct kinfo_proc), &count);
for (int i = 0; i < count; i++) {
const struct kinfo_proc* kproc = &kprocs[i];
/* Ignore main threads */
if (kproc->p_tid != -1) {
Process* containingProcess = ProcessList_findProcess(&this->super, kproc->p_pid);
if (containingProcess) {
if (((OpenBSDProcess*)containingProcess)->addr == kproc->p_addr)
continue;
containingProcess->nlwp++;
}
}
bool preExisting = false;
Process* proc = ProcessList_getProcess(&this->super, (kproc->p_tid == -1) ? kproc->p_pid : kproc->p_tid, &preExisting, OpenBSDProcess_new);
OpenBSDProcess* fp = (OpenBSDProcess*) proc;
if (!preExisting) {
proc->ppid = kproc->p_ppid;
proc->tpgid = kproc->p_tpgid;
proc->tgid = kproc->p_pid;
proc->session = kproc->p_sid;
proc->pgrp = kproc->p__pgid;
proc->isKernelThread = proc->pgrp == 0;
proc->isUserlandThread = kproc->p_tid != -1;
proc->starttime_ctime = kproc->p_ustart_sec;
Process_fillStarttimeBuffer(proc);
ProcessList_add(&this->super, proc);
OpenBSDProcessList_updateProcessName(this->kd, kproc, proc);
if (settings->ss->flags & PROCESS_FLAG_CWD) {
OpenBSDProcessList_updateCwd(kproc, proc);
}
proc->tty_nr = kproc->p_tdev;
const char* name = ((dev_t)kproc->p_tdev != NODEV) ? devname(kproc->p_tdev, S_IFCHR) : NULL;
if (!name || String_eq(name, "??")) {
free(proc->tty_name);
proc->tty_name = NULL;
} else {
free_and_xStrdup(&proc->tty_name, name);
}
} else {
if (settings->updateProcessNames) {
OpenBSDProcessList_updateProcessName(this->kd, kproc, proc);
}
}
fp->addr = kproc->p_addr;
proc->m_virt = kproc->p_vm_dsize * pageSizeKB;
proc->m_resident = kproc->p_vm_rssize * pageSizeKB;
proc->percent_mem = proc->m_resident / (float)this->super.totalMem * 100.0F;
proc->percent_cpu = CLAMP(getpcpu(kproc), 0.0F, this->super.activeCPUs * 100.0F);
proc->nice = kproc->p_nice - 20;
proc->time = 100 * (kproc->p_rtime_sec + ((kproc->p_rtime_usec + 500000) / 1000000));
proc->priority = kproc->p_priority - PZERO;
proc->processor = kproc->p_cpuid;
proc->minflt = kproc->p_uru_minflt;
proc->majflt = kproc->p_uru_majflt;
proc->nlwp = 1;
if (proc->st_uid != kproc->p_uid) {
proc->st_uid = kproc->p_uid;
proc->user = UsersTable_getRef(this->super.usersTable, proc->st_uid);
}
/* Taken from: https://github.com/openbsd/src/blob/6a38af0976a6870911f4b2de19d8da28723a5778/sys/sys/proc.h#L420 */
switch (kproc->p_stat) {
case SIDL: proc->state = IDLE; break;
case SRUN: proc->state = RUNNABLE; break;
case SSLEEP: proc->state = SLEEPING; break;
case SSTOP: proc->state = STOPPED; break;
case SZOMB: proc->state = ZOMBIE; break;
case SDEAD: proc->state = DEFUNCT; break;
case SONPROC: proc->state = RUNNING; break;
default: proc->state = UNKNOWN;
}
if (Process_isKernelThread(proc)) {
this->super.kernelThreads++;
} else if (Process_isUserlandThread(proc)) {
this->super.userlandThreads++;
}
this->super.totalTasks++;
if (proc->state == RUNNING) {
this->super.runningTasks++;
}
proc->show = ! ((hideKernelThreads && Process_isKernelThread(proc)) || (hideUserlandThreads && Process_isUserlandThread(proc)));
proc->updated = true;
}
}
static void getKernelCPUTimes(unsigned int cpuId, u_int64_t* times) {
const int mib[] = { CTL_KERN, KERN_CPTIME2, cpuId };
size_t length = sizeof(*times) * CPUSTATES;
if (sysctl(mib, 3, times, &length, NULL, 0) == -1 || length != sizeof(*times) * CPUSTATES) {
CRT_fatalError("sysctl kern.cp_time2 failed");
}
}
static void kernelCPUTimesToHtop(const u_int64_t* times, CPUData* cpu) {
unsigned long long totalTime = 0;
for (int i = 0; i < CPUSTATES; i++) {
totalTime += times[i];
}
unsigned long long sysAllTime = times[CP_INTR] + times[CP_SYS];
// XXX Not sure if CP_SPIN should be added to sysAllTime.
// See https://github.com/openbsd/src/commit/531d8034253fb82282f0f353c086e9ad827e031c
#ifdef CP_SPIN
sysAllTime += times[CP_SPIN];
#endif
cpu->totalPeriod = saturatingSub(totalTime, cpu->totalTime);
cpu->userPeriod = saturatingSub(times[CP_USER], cpu->userTime);
cpu->nicePeriod = saturatingSub(times[CP_NICE], cpu->niceTime);
cpu->sysPeriod = saturatingSub(times[CP_SYS], cpu->sysTime);
cpu->sysAllPeriod = saturatingSub(sysAllTime, cpu->sysAllTime);
#ifdef CP_SPIN
cpu->spinPeriod = saturatingSub(times[CP_SPIN], cpu->spinTime);
#endif
cpu->intrPeriod = saturatingSub(times[CP_INTR], cpu->intrTime);
cpu->idlePeriod = saturatingSub(times[CP_IDLE], cpu->idleTime);
cpu->totalTime = totalTime;
cpu->userTime = times[CP_USER];
cpu->niceTime = times[CP_NICE];
cpu->sysTime = times[CP_SYS];
cpu->sysAllTime = sysAllTime;
#ifdef CP_SPIN
cpu->spinTime = times[CP_SPIN];
#endif
cpu->intrTime = times[CP_INTR];
cpu->idleTime = times[CP_IDLE];
}
static void OpenBSDProcessList_scanCPUTime(OpenBSDProcessList* this) {
u_int64_t kernelTimes[CPUSTATES] = {0};
u_int64_t avg[CPUSTATES] = {0};
for (unsigned int i = 0; i < this->super.existingCPUs; i++) {
CPUData* cpu = &this->cpuData[i + 1];
if (!cpu->online) {
continue;
}
getKernelCPUTimes(i, kernelTimes);
kernelCPUTimesToHtop(kernelTimes, cpu);
avg[CP_USER] += cpu->userTime;
avg[CP_NICE] += cpu->niceTime;
avg[CP_SYS] += cpu->sysTime;
#ifdef CP_SPIN
avg[CP_SPIN] += cpu->spinTime;
#endif
avg[CP_INTR] += cpu->intrTime;
avg[CP_IDLE] += cpu->idleTime;
}
for (int i = 0; i < CPUSTATES; i++) {
avg[i] /= this->super.activeCPUs;
}
kernelCPUTimesToHtop(avg, &this->cpuData[0]);
{
const int mib[] = { CTL_HW, HW_CPUSPEED };
int cpuSpeed;
size_t size = sizeof(cpuSpeed);
if (sysctl(mib, 2, &cpuSpeed, &size, NULL, 0) == -1) {
this->cpuSpeed = -1;
} else {
this->cpuSpeed = cpuSpeed;
}
}
}
void ProcessList_goThroughEntries(ProcessList* super, bool pauseProcessUpdate) {
OpenBSDProcessList* opl = (OpenBSDProcessList*) super;
OpenBSDProcessList_updateCPUcount(super);
OpenBSDProcessList_scanMemoryInfo(super);
OpenBSDProcessList_scanCPUTime(opl);
// in pause mode only gather global data for meters (CPU/memory/...)
if (pauseProcessUpdate) {
return;
}
OpenBSDProcessList_scanProcs(opl);
}
bool ProcessList_isCPUonline(const ProcessList* super, unsigned int id) {
assert(id < super->existingCPUs);
const OpenBSDProcessList* opl = (const OpenBSDProcessList*) super;
return opl->cpuData[id + 1].online;
}
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