7551d83c35
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
250 lines
6.3 KiB
C
250 lines
6.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2007 Robert N. M. Watson
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* Copyright (c) 2015 Allan Jude <allanjude@freebsd.org>
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* 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 AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE 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
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* OR 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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* $FreeBSD$
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*/
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#include <sys/param.h>
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#include <sys/sysctl.h>
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#include <sys/user.h>
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#include <err.h>
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#include <errno.h>
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#include <libprocstat.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "procstat.h"
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/*
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* Walk the stack trace provided by the kernel and reduce it to what we
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* actually want to print. This involves stripping true instruction pointers,
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* frame numbers, and carriage returns as generated by stack(9). If -kk is
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* specified, print the function and offset, otherwise just the function.
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*/
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enum trace_state { TS_FRAMENUM, TS_PC, TS_AT, TS_FUNC, TS_OFF };
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static enum trace_state
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kstack_nextstate(enum trace_state ts)
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{
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switch (ts) {
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case TS_FRAMENUM:
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return (TS_PC);
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case TS_PC:
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return (TS_AT);
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case TS_AT:
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return (TS_FUNC);
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case TS_FUNC:
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return (TS_OFF);
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case TS_OFF:
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return TS_FRAMENUM;
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default:
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errx(-1, "kstack_nextstate");
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}
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}
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static void
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kstack_cleanup(const char *old, char *new, int kflag)
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{
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enum trace_state old_ts, ts;
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const char *cp_old;
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char *cp_new;
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ts = TS_FRAMENUM;
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for (cp_old = old, cp_new = new; *cp_old != '\0'; cp_old++) {
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switch (*cp_old) {
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case ' ':
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case '\n':
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case '+':
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old_ts = ts;
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ts = kstack_nextstate(old_ts);
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if (old_ts == TS_OFF) {
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*cp_new = ' ';
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cp_new++;
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}
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if (kflag > 1 && old_ts == TS_FUNC) {
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*cp_new = '+';
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cp_new++;
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}
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continue;
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}
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if (ts == TS_FUNC || (kflag > 1 && ts == TS_OFF)) {
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*cp_new = *cp_old;
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cp_new++;
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}
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}
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*cp_new = '\0';
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}
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static void
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kstack_cleanup_encoded(const char *old, char *new, int kflag)
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{
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enum trace_state old_ts, ts;
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const char *cp_old;
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char *cp_new, *cp_loop, *cp_tofree, *cp_line;
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ts = TS_FRAMENUM;
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if (kflag == 1) {
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for (cp_old = old, cp_new = new; *cp_old != '\0'; cp_old++) {
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switch (*cp_old) {
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case '\n':
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*cp_new = *cp_old;
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cp_new++;
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case ' ':
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case '+':
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old_ts = ts;
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ts = kstack_nextstate(old_ts);
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continue;
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}
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if (ts == TS_FUNC) {
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*cp_new = *cp_old;
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cp_new++;
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}
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}
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*cp_new = '\0';
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cp_tofree = cp_loop = strdup(new);
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} else
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cp_tofree = cp_loop = strdup(old);
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while ((cp_line = strsep(&cp_loop, "\n")) != NULL) {
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if (strlen(cp_line) != 0 && *cp_line != 127)
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xo_emit("{le:token/%s}", cp_line);
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}
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free(cp_tofree);
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}
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/*
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* Sort threads by tid.
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*/
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static int
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kinfo_kstack_compare(const void *a, const void *b)
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{
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return ((const struct kinfo_kstack *)a)->kkst_tid -
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((const struct kinfo_kstack *)b)->kkst_tid;
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}
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static void
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kinfo_kstack_sort(struct kinfo_kstack *kkstp, int count)
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{
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qsort(kkstp, count, sizeof(*kkstp), kinfo_kstack_compare);
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}
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void
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procstat_kstack(struct procstat *procstat, struct kinfo_proc *kipp)
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{
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struct kinfo_kstack *kkstp, *kkstp_free;
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struct kinfo_proc *kip, *kip_free;
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char trace[KKST_MAXLEN], encoded_trace[KKST_MAXLEN];
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unsigned int i, j;
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unsigned int kip_count, kstk_count;
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if ((procstat_opts & PS_OPT_NOHEADER) == 0)
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xo_emit("{T:/%5s %6s %-19s %-19s %-29s}\n", "PID", "TID", "COMM",
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"TDNAME", "KSTACK");
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kkstp = kkstp_free = procstat_getkstack(procstat, kipp, &kstk_count);
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if (kkstp == NULL)
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return;
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/*
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* We need to re-query for thread information, so don't use *kipp.
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*/
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kip = kip_free = procstat_getprocs(procstat,
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KERN_PROC_PID | KERN_PROC_INC_THREAD, kipp->ki_pid, &kip_count);
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if (kip == NULL) {
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procstat_freekstack(procstat, kkstp_free);
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return;
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}
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kinfo_kstack_sort(kkstp, kstk_count);
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for (i = 0; i < kstk_count; i++) {
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kkstp = &kkstp_free[i];
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/*
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* Look up the specific thread using its tid so we can
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* display the per-thread command line.
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*/
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kipp = NULL;
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for (j = 0; j < kip_count; j++) {
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kipp = &kip_free[j];
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if (kkstp->kkst_tid == kipp->ki_tid)
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break;
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}
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if (kipp == NULL)
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continue;
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xo_emit("{k:process_id/%5d/%d} ", kipp->ki_pid);
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xo_emit("{:thread_id/%6d/%d} ", kkstp->kkst_tid);
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xo_emit("{:command/%-19s/%s} ", kipp->ki_comm);
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xo_emit("{:thread_name/%-19s/%s} ",
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kinfo_proc_thread_name(kipp));
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switch (kkstp->kkst_state) {
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case KKST_STATE_RUNNING:
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xo_emit("{:state/%-29s/%s}\n", "<running>");
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continue;
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case KKST_STATE_SWAPPED:
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xo_emit("{:state/%-29s/%s}\n", "<swapped>");
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continue;
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case KKST_STATE_STACKOK:
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break;
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default:
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xo_emit("{:state/%-29s/%s}\n", "<unknown>");
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continue;
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}
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/*
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* The kernel generates a trace with carriage returns between
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* entries, but for a more compact view, we convert carriage
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* returns to spaces.
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*/
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kstack_cleanup(kkstp->kkst_trace, trace,
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(procstat_opts & PS_OPT_VERBOSE) != 0 ? 2 : 1);
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xo_open_list("trace");
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kstack_cleanup_encoded(kkstp->kkst_trace, encoded_trace,
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(procstat_opts & PS_OPT_VERBOSE) != 0 ? 2 : 1);
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xo_close_list("trace");
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xo_emit("{d:trace/%-29s}\n", trace);
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}
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procstat_freekstack(procstat, kkstp_free);
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procstat_freeprocs(procstat, kip_free);
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}
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