Import plockstat from OpenSolaris r12768.
This commit is contained in:
rpaulo
parent
f4f56223ab
commit
82ca49cf3c
996
cmd/plockstat/plockstat.c
Normal file
996
cmd/plockstat/plockstat.c
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@ -0,0 +1,996 @@
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/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#pragma ident "%Z%%M% %I% %E% SMI"
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#include <assert.h>
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#include <dtrace.h>
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#include <limits.h>
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#include <link.h>
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#include <priv.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <string.h>
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#include <strings.h>
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#include <errno.h>
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#include <sys/wait.h>
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#include <libgen.h>
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#include <libproc.h>
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static char *g_pname;
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static dtrace_hdl_t *g_dtp;
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struct ps_prochandle *g_pr;
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#define E_SUCCESS 0
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#define E_ERROR 1
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#define E_USAGE 2
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/*
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* For hold times we use a global associative array since for mutexes, in
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* user-land, it's not invalid to release a sychonization primitive that
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* another thread acquired; rwlocks require a thread-local associative array
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* since multiple thread can hold the same lock for reading. Note that we
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* ignore recursive mutex acquisitions and releases as they don't truly
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* affect lock contention.
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*/
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static const char *g_hold_init =
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"plockstat$target:::rw-acquire\n"
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"{\n"
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" self->rwhold[arg0] = timestamp;\n"
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"}\n"
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"plockstat$target:::mutex-acquire\n"
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"/arg1 == 0/\n"
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"{\n"
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" mtxhold[arg0] = timestamp;\n"
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"}\n";
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static const char *g_hold_histogram =
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"plockstat$target:::rw-release\n"
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"/self->rwhold[arg0] && arg1 == 1/\n"
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"{\n"
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" @rw_w_hold[arg0, ustack()] =\n"
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" quantize(timestamp - self->rwhold[arg0]);\n"
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" self->rwhold[arg0] = 0;\n"
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" rw_w_hold_found = 1;\n"
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"}\n"
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"plockstat$target:::rw-release\n"
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"/self->rwhold[arg0]/\n"
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"{\n"
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" @rw_r_hold[arg0, ustack()] =\n"
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" quantize(timestamp - self->rwhold[arg0]);\n"
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" self->rwhold[arg0] = 0;\n"
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" rw_r_hold_found = 1;\n"
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"}\n"
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"plockstat$target:::mutex-release\n"
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"/mtxhold[arg0] && arg1 == 0/\n"
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"{\n"
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" @mtx_hold[arg0, ustack()] = quantize(timestamp - mtxhold[arg0]);\n"
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" mtxhold[arg0] = 0;\n"
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" mtx_hold_found = 1;\n"
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"}\n"
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"\n"
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"END\n"
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"/mtx_hold_found/\n"
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"{\n"
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" trace(\"Mutex hold\");\n"
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" printa(@mtx_hold);\n"
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"}\n"
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"END\n"
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"/rw_r_hold_found/\n"
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"{\n"
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" trace(\"R/W reader hold\");\n"
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" printa(@rw_r_hold);\n"
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"}\n"
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"END\n"
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"/rw_w_hold_found/\n"
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"{\n"
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" trace(\"R/W writer hold\");\n"
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" printa(@rw_w_hold);\n"
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"}\n";
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static const char *g_hold_times =
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"plockstat$target:::rw-release\n"
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"/self->rwhold[arg0] && arg1 == 1/\n"
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"{\n"
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" @rw_w_hold[arg0, ustack(5)] = sum(timestamp - self->rwhold[arg0]);\n"
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" @rw_w_hold_count[arg0, ustack(5)] = count();\n"
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" self->rwhold[arg0] = 0;\n"
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" rw_w_hold_found = 1;\n"
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"}\n"
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"plockstat$target:::rw-release\n"
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"/self->rwhold[arg0]/\n"
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"{\n"
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" @rw_r_hold[arg0, ustack(5)] = sum(timestamp - self->rwhold[arg0]);\n"
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" @rw_r_hold_count[arg0, ustack(5)] = count();\n"
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" self->rwhold[arg0] = 0;\n"
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" rw_r_hold_found = 1;\n"
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"}\n"
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"plockstat$target:::mutex-release\n"
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"/mtxhold[arg0] && arg1 == 0/\n"
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"{\n"
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" @mtx_hold[arg0, ustack(5)] = sum(timestamp - mtxhold[arg0]);\n"
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" @mtx_hold_count[arg0, ustack(5)] = count();\n"
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" mtxhold[arg0] = 0;\n"
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" mtx_hold_found = 1;\n"
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"}\n"
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"\n"
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"END\n"
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"/mtx_hold_found/\n"
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"{\n"
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" trace(\"Mutex hold\");\n"
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" printa(@mtx_hold, @mtx_hold_count);\n"
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"}\n"
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"END\n"
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"/rw_r_hold_found/\n"
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"{\n"
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" trace(\"R/W reader hold\");\n"
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" printa(@rw_r_hold, @rw_r_hold_count);\n"
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"}\n"
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"END\n"
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"/rw_w_hold_found/\n"
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"{\n"
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" trace(\"R/W writer hold\");\n"
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" printa(@rw_w_hold, @rw_w_hold_count);\n"
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"}\n";
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/*
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* For contention, we use thread-local associative arrays since we're tracing
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* a single thread's activity in libc and multiple threads can be blocking or
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* spinning on the same sychonization primitive.
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*/
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static const char *g_ctnd_init =
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"plockstat$target:::rw-block\n"
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"{\n"
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" self->rwblock[arg0] = timestamp;\n"
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"}\n"
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"plockstat$target:::mutex-block\n"
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"{\n"
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" self->mtxblock[arg0] = timestamp;\n"
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"}\n"
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"plockstat$target:::mutex-spin\n"
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"{\n"
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" self->mtxspin[arg0] = timestamp;\n"
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"}\n";
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static const char *g_ctnd_histogram =
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"plockstat$target:::rw-blocked\n"
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"/self->rwblock[arg0] && arg1 == 1 && arg2 != 0/\n"
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"{\n"
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" @rw_w_block[arg0, ustack()] =\n"
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" quantize(timestamp - self->rwblock[arg0]);\n"
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" self->rwblock[arg0] = 0;\n"
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" rw_w_block_found = 1;\n"
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"}\n"
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"plockstat$target:::rw-blocked\n"
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"/self->rwblock[arg0] && arg2 != 0/\n"
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"{\n"
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" @rw_r_block[arg0, ustack()] =\n"
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" quantize(timestamp - self->rwblock[arg0]);\n"
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" self->rwblock[arg0] = 0;\n"
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" rw_r_block_found = 1;\n"
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"}\n"
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"plockstat$target:::rw-blocked\n"
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"/self->rwblock[arg0]/\n"
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"{\n"
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" self->rwblock[arg0] = 0;\n"
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"}\n"
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"plockstat$target:::mutex-spun\n"
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"/self->mtxspin[arg0] && arg1 != 0/\n"
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"{\n"
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" @mtx_spin[arg0, ustack()] =\n"
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" quantize(timestamp - self->mtxspin[arg0]);\n"
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" self->mtxspin[arg0] = 0;\n"
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" mtx_spin_found = 1;\n"
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"}\n"
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"plockstat$target:::mutex-spun\n"
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"/self->mtxspin[arg0]/\n"
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"{\n"
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" @mtx_vain_spin[arg0, ustack()] =\n"
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" quantize(timestamp - self->mtxspin[arg0]);\n"
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" self->mtxspin[arg0] = 0;\n"
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" mtx_vain_spin_found = 1;\n"
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"}\n"
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"plockstat$target:::mutex-blocked\n"
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"/self->mtxblock[arg0] && arg1 != 0/\n"
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"{\n"
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" @mtx_block[arg0, ustack()] =\n"
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" quantize(timestamp - self->mtxblock[arg0]);\n"
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" self->mtxblock[arg0] = 0;\n"
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" mtx_block_found = 1;\n"
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"}\n"
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"plockstat$target:::mutex-blocked\n"
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"/self->mtxblock[arg0]/\n"
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"{\n"
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" self->mtxblock[arg0] = 0;\n"
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"}\n"
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"\n"
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"END\n"
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"/mtx_block_found/\n"
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"{\n"
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" trace(\"Mutex block\");\n"
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" printa(@mtx_block);\n"
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"}\n"
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"END\n"
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"/mtx_spin_found/\n"
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"{\n"
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" trace(\"Mutex spin\");\n"
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" printa(@mtx_spin);\n"
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"}\n"
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"END\n"
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"/mtx_vain_spin_found/\n"
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"{\n"
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" trace(\"Mutex unsuccessful spin\");\n"
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" printa(@mtx_vain_spin);\n"
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"}\n"
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"END\n"
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"/rw_r_block_found/\n"
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"{\n"
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" trace(\"R/W reader block\");\n"
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" printa(@rw_r_block);\n"
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"}\n"
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"END\n"
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"/rw_w_block_found/\n"
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"{\n"
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" trace(\"R/W writer block\");\n"
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" printa(@rw_w_block);\n"
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"}\n";
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static const char *g_ctnd_times =
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"plockstat$target:::rw-blocked\n"
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"/self->rwblock[arg0] && arg1 == 1 && arg2 != 0/\n"
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"{\n"
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" @rw_w_block[arg0, ustack(5)] =\n"
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" sum(timestamp - self->rwblock[arg0]);\n"
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" @rw_w_block_count[arg0, ustack(5)] = count();\n"
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" self->rwblock[arg0] = 0;\n"
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" rw_w_block_found = 1;\n"
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"}\n"
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"plockstat$target:::rw-blocked\n"
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"/self->rwblock[arg0] && arg2 != 0/\n"
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"{\n"
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" @rw_r_block[arg0, ustack(5)] =\n"
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" sum(timestamp - self->rwblock[arg0]);\n"
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" @rw_r_block_count[arg0, ustack(5)] = count();\n"
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" self->rwblock[arg0] = 0;\n"
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" rw_r_block_found = 1;\n"
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"}\n"
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"plockstat$target:::rw-blocked\n"
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"/self->rwblock[arg0]/\n"
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"{\n"
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" self->rwblock[arg0] = 0;\n"
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"}\n"
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"plockstat$target:::mutex-spun\n"
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"/self->mtxspin[arg0] && arg1 != 0/\n"
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"{\n"
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" @mtx_spin[arg0, ustack(5)] =\n"
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" sum(timestamp - self->mtxspin[arg0]);\n"
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" @mtx_spin_count[arg0, ustack(5)] = count();\n"
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" self->mtxspin[arg0] = 0;\n"
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" mtx_spin_found = 1;\n"
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"}\n"
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"plockstat$target:::mutex-spun\n"
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"/self->mtxspin[arg0]/\n"
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"{\n"
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" @mtx_vain_spin[arg0, ustack(5)] =\n"
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" sum(timestamp - self->mtxspin[arg0]);\n"
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" @mtx_vain_spin_count[arg0, ustack(5)] = count();\n"
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" self->mtxspin[arg0] = 0;\n"
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" mtx_vain_spin_found = 1;\n"
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"}\n"
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"plockstat$target:::mutex-blocked\n"
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"/self->mtxblock[arg0] && arg1 != 0/\n"
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"{\n"
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" @mtx_block[arg0, ustack(5)] =\n"
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" sum(timestamp - self->mtxblock[arg0]);\n"
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" @mtx_block_count[arg0, ustack(5)] = count();\n"
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" self->mtxblock[arg0] = 0;\n"
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" mtx_block_found = 1;\n"
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"}\n"
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"plockstat$target:::mutex-blocked\n"
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"/self->mtxblock[arg0]/\n"
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"{\n"
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" self->mtxblock[arg0] = 0;\n"
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"}\n"
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"\n"
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"END\n"
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"/mtx_block_found/\n"
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"{\n"
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" trace(\"Mutex block\");\n"
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" printa(@mtx_block, @mtx_block_count);\n"
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"}\n"
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"END\n"
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"/mtx_spin_found/\n"
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"{\n"
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" trace(\"Mutex spin\");\n"
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" printa(@mtx_spin, @mtx_spin_count);\n"
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"}\n"
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"END\n"
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"/mtx_vain_spin_found/\n"
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"{\n"
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" trace(\"Mutex unsuccessful spin\");\n"
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" printa(@mtx_vain_spin, @mtx_vain_spin_count);\n"
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"}\n"
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"END\n"
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"/rw_r_block_found/\n"
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"{\n"
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" trace(\"R/W reader block\");\n"
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" printa(@rw_r_block, @rw_r_block_count);\n"
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"}\n"
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"END\n"
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"/rw_w_block_found/\n"
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"{\n"
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" trace(\"R/W writer block\");\n"
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" printa(@rw_w_block, @rw_w_block_count);\n"
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"}\n";
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static char g_prog[4096];
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static size_t g_proglen;
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static int g_opt_V, g_opt_s;
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static int g_intr;
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static int g_exited;
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static dtrace_optval_t g_nframes;
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static ulong_t g_nent = ULONG_MAX;
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#define PLOCKSTAT_OPTSTR "n:ps:e:vx:ACHV"
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static void
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usage(void)
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{
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(void) fprintf(stderr, "Usage:\n"
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"\t%s [-vACHV] [-n count] [-s depth] [-e secs] [-x opt[=val]]\n"
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"\t command [arg...]\n"
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"\t%s [-vACHV] [-n count] [-s depth] [-e secs] [-x opt[=val]]\n"
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"\t -p pid\n", g_pname, g_pname);
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exit(E_USAGE);
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}
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static void
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verror(const char *fmt, va_list ap)
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{
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int error = errno;
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(void) fprintf(stderr, "%s: ", g_pname);
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(void) vfprintf(stderr, fmt, ap);
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if (fmt[strlen(fmt) - 1] != '\n')
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(void) fprintf(stderr, ": %s\n", strerror(error));
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}
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/*PRINTFLIKE1*/
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static void
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fatal(const char *fmt, ...)
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{
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va_list ap;
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va_start(ap, fmt);
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verror(fmt, ap);
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va_end(ap);
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if (g_pr != NULL && g_dtp != NULL)
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dtrace_proc_release(g_dtp, g_pr);
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exit(E_ERROR);
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}
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||||
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/*PRINTFLIKE1*/
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static void
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dfatal(const char *fmt, ...)
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||||
{
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va_list ap;
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va_start(ap, fmt);
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||||
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(void) fprintf(stderr, "%s: ", g_pname);
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if (fmt != NULL)
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(void) vfprintf(stderr, fmt, ap);
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||||
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va_end(ap);
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||||
if (fmt != NULL && fmt[strlen(fmt) - 1] != '\n') {
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(void) fprintf(stderr, ": %s\n",
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dtrace_errmsg(g_dtp, dtrace_errno(g_dtp)));
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} else if (fmt == NULL) {
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(void) fprintf(stderr, "%s\n",
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dtrace_errmsg(g_dtp, dtrace_errno(g_dtp)));
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||||
}
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||||
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if (g_pr != NULL) {
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dtrace_proc_continue(g_dtp, g_pr);
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dtrace_proc_release(g_dtp, g_pr);
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||||
}
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||||
|
||||
exit(E_ERROR);
|
||||
}
|
||||
|
||||
/*PRINTFLIKE1*/
|
||||
static void
|
||||
notice(const char *fmt, ...)
|
||||
{
|
||||
va_list ap;
|
||||
|
||||
va_start(ap, fmt);
|
||||
verror(fmt, ap);
|
||||
va_end(ap);
|
||||
}
|
||||
|
||||
static void
|
||||
dprog_add(const char *prog)
|
||||
{
|
||||
size_t len = strlen(prog);
|
||||
bcopy(prog, g_prog + g_proglen, len + 1);
|
||||
g_proglen += len;
|
||||
assert(g_proglen < sizeof (g_prog));
|
||||
}
|
||||
|
||||
static void
|
||||
dprog_compile(void)
|
||||
{
|
||||
dtrace_prog_t *prog;
|
||||
dtrace_proginfo_t info;
|
||||
|
||||
if (g_opt_V) {
|
||||
(void) fprintf(stderr, "%s: vvvv D program vvvv\n", g_pname);
|
||||
(void) fputs(g_prog, stderr);
|
||||
(void) fprintf(stderr, "%s: ^^^^ D program ^^^^\n", g_pname);
|
||||
}
|
||||
|
||||
if ((prog = dtrace_program_strcompile(g_dtp, g_prog,
|
||||
DTRACE_PROBESPEC_NAME, 0, 0, NULL)) == NULL)
|
||||
dfatal("failed to compile program");
|
||||
|
||||
if (dtrace_program_exec(g_dtp, prog, &info) == -1)
|
||||
dfatal("failed to enable probes");
|
||||
}
|
||||
|
||||
void
|
||||
print_legend(void)
|
||||
{
|
||||
(void) printf("%5s %8s %-28s %s\n", "Count", "nsec", "Lock", "Caller");
|
||||
}
|
||||
|
||||
void
|
||||
print_bar(void)
|
||||
{
|
||||
(void) printf("---------------------------------------"
|
||||
"----------------------------------------\n");
|
||||
}
|
||||
|
||||
void
|
||||
print_histogram_header(void)
|
||||
{
|
||||
(void) printf("\n%10s ---- Time Distribution --- %5s %s\n",
|
||||
"nsec", "count", "Stack");
|
||||
}
|
||||
|
||||
/*
|
||||
* Convert an address to a symbolic string or a numeric string. If nolocks
|
||||
* is set, we return an error code if this symbol appears to be a mutex- or
|
||||
* rwlock-related symbol in libc so the caller has a chance to find a more
|
||||
* helpful symbol.
|
||||
*/
|
||||
static int
|
||||
getsym(struct ps_prochandle *P, uintptr_t addr, char *buf, size_t size,
|
||||
int nolocks)
|
||||
{
|
||||
char name[256];
|
||||
GElf_Sym sym;
|
||||
prsyminfo_t info;
|
||||
size_t len;
|
||||
|
||||
if (P == NULL || Pxlookup_by_addr(P, addr, name, sizeof (name),
|
||||
&sym, &info) != 0) {
|
||||
(void) snprintf(buf, size, "%#lx", addr);
|
||||
return (0);
|
||||
}
|
||||
if (info.prs_object == NULL)
|
||||
info.prs_object = "<unknown>";
|
||||
|
||||
if (info.prs_lmid != LM_ID_BASE) {
|
||||
len = snprintf(buf, size, "LM%lu`", info.prs_lmid);
|
||||
buf += len;
|
||||
size -= len;
|
||||
}
|
||||
|
||||
len = snprintf(buf, size, "%s`%s", info.prs_object, info.prs_name);
|
||||
buf += len;
|
||||
size -= len;
|
||||
|
||||
if (sym.st_value != addr)
|
||||
len = snprintf(buf, size, "+%#lx", addr - sym.st_value);
|
||||
|
||||
if (nolocks && strcmp("libc.so.1", info.prs_object) == 0 &&
|
||||
(strstr("mutex", info.prs_name) == 0 ||
|
||||
strstr("rw", info.prs_name) == 0))
|
||||
return (-1);
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
/*ARGSUSED*/
|
||||
static int
|
||||
process_aggregate(const dtrace_aggdata_t **aggsdata, int naggvars, void *arg)
|
||||
{
|
||||
const dtrace_recdesc_t *rec;
|
||||
uintptr_t lock;
|
||||
uint64_t *stack;
|
||||
caddr_t data;
|
||||
pid_t pid;
|
||||
struct ps_prochandle *P;
|
||||
char buf[256];
|
||||
int i, j;
|
||||
uint64_t sum, count, avg;
|
||||
|
||||
if ((*(uint_t *)arg)++ >= g_nent)
|
||||
return (DTRACE_AGGWALK_NEXT);
|
||||
|
||||
rec = aggsdata[0]->dtada_desc->dtagd_rec;
|
||||
data = aggsdata[0]->dtada_data;
|
||||
|
||||
/*LINTED - alignment*/
|
||||
lock = (uintptr_t)*(uint64_t *)(data + rec[1].dtrd_offset);
|
||||
/*LINTED - alignment*/
|
||||
stack = (uint64_t *)(data + rec[2].dtrd_offset);
|
||||
|
||||
if (!g_opt_s) {
|
||||
/*LINTED - alignment*/
|
||||
sum = *(uint64_t *)(aggsdata[1]->dtada_data +
|
||||
aggsdata[1]->dtada_desc->dtagd_rec[3].dtrd_offset);
|
||||
/*LINTED - alignment*/
|
||||
count = *(uint64_t *)(aggsdata[2]->dtada_data +
|
||||
aggsdata[2]->dtada_desc->dtagd_rec[3].dtrd_offset);
|
||||
} else {
|
||||
uint64_t *a;
|
||||
|
||||
/*LINTED - alignment*/
|
||||
a = (uint64_t *)(aggsdata[1]->dtada_data +
|
||||
aggsdata[1]->dtada_desc->dtagd_rec[3].dtrd_offset);
|
||||
|
||||
print_bar();
|
||||
print_legend();
|
||||
|
||||
for (count = sum = 0, i = DTRACE_QUANTIZE_ZEROBUCKET, j = 0;
|
||||
i < DTRACE_QUANTIZE_NBUCKETS; i++, j++) {
|
||||
count += a[i];
|
||||
sum += a[i] << (j - 64);
|
||||
}
|
||||
}
|
||||
|
||||
avg = sum / count;
|
||||
(void) printf("%5llu %8llu ", (u_longlong_t)count, (u_longlong_t)avg);
|
||||
|
||||
pid = stack[0];
|
||||
P = dtrace_proc_grab(g_dtp, pid, PGRAB_RDONLY);
|
||||
|
||||
(void) getsym(P, lock, buf, sizeof (buf), 0);
|
||||
(void) printf("%-28s ", buf);
|
||||
|
||||
for (i = 2; i <= 5; i++) {
|
||||
if (getsym(P, stack[i], buf, sizeof (buf), 1) == 0)
|
||||
break;
|
||||
}
|
||||
(void) printf("%s\n", buf);
|
||||
|
||||
if (g_opt_s) {
|
||||
int stack_done = 0;
|
||||
int quant_done = 0;
|
||||
int first_bin, last_bin;
|
||||
uint64_t bin_size, *a;
|
||||
|
||||
/*LINTED - alignment*/
|
||||
a = (uint64_t *)(aggsdata[1]->dtada_data +
|
||||
aggsdata[1]->dtada_desc->dtagd_rec[3].dtrd_offset);
|
||||
|
||||
print_histogram_header();
|
||||
|
||||
for (first_bin = DTRACE_QUANTIZE_ZEROBUCKET;
|
||||
a[first_bin] == 0; first_bin++)
|
||||
continue;
|
||||
for (last_bin = DTRACE_QUANTIZE_ZEROBUCKET + 63;
|
||||
a[last_bin] == 0; last_bin--)
|
||||
continue;
|
||||
|
||||
for (i = 0; !stack_done || !quant_done; i++) {
|
||||
if (!stack_done) {
|
||||
(void) getsym(P, stack[i + 2], buf,
|
||||
sizeof (buf), 0);
|
||||
} else {
|
||||
buf[0] = '\0';
|
||||
}
|
||||
|
||||
if (!quant_done) {
|
||||
bin_size = a[first_bin];
|
||||
|
||||
(void) printf("%10llu |%-24.*s| %5llu %s\n",
|
||||
1ULL <<
|
||||
(first_bin - DTRACE_QUANTIZE_ZEROBUCKET),
|
||||
(int)(24.0 * bin_size / count),
|
||||
"@@@@@@@@@@@@@@@@@@@@@@@@@@",
|
||||
(u_longlong_t)bin_size, buf);
|
||||
} else {
|
||||
(void) printf("%43s %s\n", "", buf);
|
||||
}
|
||||
|
||||
if (i + 1 >= g_nframes || stack[i + 3] == 0)
|
||||
stack_done = 1;
|
||||
|
||||
if (first_bin++ == last_bin)
|
||||
quant_done = 1;
|
||||
}
|
||||
}
|
||||
|
||||
dtrace_proc_release(g_dtp, P);
|
||||
|
||||
return (DTRACE_AGGWALK_NEXT);
|
||||
}
|
||||
|
||||
/*ARGSUSED*/
|
||||
static void
|
||||
prochandler(struct ps_prochandle *P, const char *msg, void *arg)
|
||||
{
|
||||
const psinfo_t *prp = Ppsinfo(P);
|
||||
int pid = Pstatus(P)->pr_pid;
|
||||
char name[SIG2STR_MAX];
|
||||
|
||||
if (msg != NULL) {
|
||||
notice("pid %d: %s\n", pid, msg);
|
||||
return;
|
||||
}
|
||||
|
||||
switch (Pstate(P)) {
|
||||
case PS_UNDEAD:
|
||||
/*
|
||||
* Ideally we would like to always report pr_wstat here, but it
|
||||
* isn't possible given current /proc semantics. If we grabbed
|
||||
* the process, Ppsinfo() will either fail or return a zeroed
|
||||
* psinfo_t depending on how far the parent is in reaping it.
|
||||
* When /proc provides a stable pr_wstat in the status file,
|
||||
* this code can be improved by examining this new pr_wstat.
|
||||
*/
|
||||
if (prp != NULL && WIFSIGNALED(prp->pr_wstat)) {
|
||||
notice("pid %d terminated by %s\n", pid,
|
||||
proc_signame(WTERMSIG(prp->pr_wstat),
|
||||
name, sizeof (name)));
|
||||
} else if (prp != NULL && WEXITSTATUS(prp->pr_wstat) != 0) {
|
||||
notice("pid %d exited with status %d\n",
|
||||
pid, WEXITSTATUS(prp->pr_wstat));
|
||||
} else {
|
||||
notice("pid %d has exited\n", pid);
|
||||
}
|
||||
g_exited = 1;
|
||||
break;
|
||||
|
||||
case PS_LOST:
|
||||
notice("pid %d exec'd a set-id or unobservable program\n", pid);
|
||||
g_exited = 1;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
/*ARGSUSED*/
|
||||
static int
|
||||
chewrec(const dtrace_probedata_t *data, const dtrace_recdesc_t *rec, void *arg)
|
||||
{
|
||||
dtrace_eprobedesc_t *epd = data->dtpda_edesc;
|
||||
dtrace_aggvarid_t aggvars[2];
|
||||
const void *buf;
|
||||
int i, nagv;
|
||||
|
||||
/*
|
||||
* A NULL rec indicates that we've processed the last record.
|
||||
*/
|
||||
if (rec == NULL)
|
||||
return (DTRACE_CONSUME_NEXT);
|
||||
|
||||
buf = data->dtpda_data - rec->dtrd_offset;
|
||||
|
||||
switch (rec->dtrd_action) {
|
||||
case DTRACEACT_DIFEXPR:
|
||||
(void) printf("\n%s\n\n", (char *)buf + rec->dtrd_offset);
|
||||
if (!g_opt_s) {
|
||||
print_legend();
|
||||
print_bar();
|
||||
}
|
||||
return (DTRACE_CONSUME_NEXT);
|
||||
|
||||
case DTRACEACT_PRINTA:
|
||||
for (nagv = 0, i = 0; i < epd->dtepd_nrecs - 1; i++) {
|
||||
const dtrace_recdesc_t *nrec = &rec[i];
|
||||
|
||||
if (nrec->dtrd_uarg != rec->dtrd_uarg)
|
||||
break;
|
||||
|
||||
/*LINTED - alignment*/
|
||||
aggvars[nagv++] = *(dtrace_aggvarid_t *)((caddr_t)buf +
|
||||
nrec->dtrd_offset);
|
||||
}
|
||||
|
||||
if (nagv == (g_opt_s ? 1 : 2)) {
|
||||
uint_t nent = 0;
|
||||
if (dtrace_aggregate_walk_joined(g_dtp, aggvars, nagv,
|
||||
process_aggregate, &nent) != 0)
|
||||
dfatal("failed to walk aggregate");
|
||||
}
|
||||
|
||||
return (DTRACE_CONSUME_NEXT);
|
||||
}
|
||||
|
||||
return (DTRACE_CONSUME_THIS);
|
||||
}
|
||||
|
||||
/*ARGSUSED*/
|
||||
static void
|
||||
intr(int signo)
|
||||
{
|
||||
g_intr = 1;
|
||||
}
|
||||
|
||||
int
|
||||
main(int argc, char **argv)
|
||||
{
|
||||
ucred_t *ucp;
|
||||
int err;
|
||||
int opt_C = 0, opt_H = 0, opt_p = 0, opt_v = 0;
|
||||
char c, *p, *end;
|
||||
struct sigaction act;
|
||||
int done = 0;
|
||||
|
||||
g_pname = basename(argv[0]);
|
||||
argv[0] = g_pname; /* rewrite argv[0] for getopt errors */
|
||||
|
||||
/*
|
||||
* Make sure we have the required dtrace_proc privilege.
|
||||
*/
|
||||
if ((ucp = ucred_get(getpid())) != NULL) {
|
||||
const priv_set_t *psp;
|
||||
if ((psp = ucred_getprivset(ucp, PRIV_EFFECTIVE)) != NULL &&
|
||||
!priv_ismember(psp, PRIV_DTRACE_PROC)) {
|
||||
fatal("dtrace_proc privilege required\n");
|
||||
}
|
||||
|
||||
ucred_free(ucp);
|
||||
}
|
||||
|
||||
while ((c = getopt(argc, argv, PLOCKSTAT_OPTSTR)) != EOF) {
|
||||
switch (c) {
|
||||
case 'n':
|
||||
errno = 0;
|
||||
g_nent = strtoul(optarg, &end, 10);
|
||||
if (*end != '\0' || errno != 0) {
|
||||
(void) fprintf(stderr, "%s: invalid count "
|
||||
"'%s'\n", g_pname, optarg);
|
||||
usage();
|
||||
}
|
||||
break;
|
||||
|
||||
case 'p':
|
||||
opt_p = 1;
|
||||
break;
|
||||
|
||||
case 'v':
|
||||
opt_v = 1;
|
||||
break;
|
||||
|
||||
case 'A':
|
||||
opt_C = opt_H = 1;
|
||||
break;
|
||||
|
||||
case 'C':
|
||||
opt_C = 1;
|
||||
break;
|
||||
|
||||
case 'H':
|
||||
opt_H = 1;
|
||||
break;
|
||||
|
||||
case 'V':
|
||||
g_opt_V = 1;
|
||||
break;
|
||||
|
||||
default:
|
||||
if (strchr(PLOCKSTAT_OPTSTR, c) == NULL)
|
||||
usage();
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* We need a command or at least one pid.
|
||||
*/
|
||||
if (argc == optind)
|
||||
usage();
|
||||
|
||||
if (opt_C == 0 && opt_H == 0)
|
||||
opt_C = 1;
|
||||
|
||||
if ((g_dtp = dtrace_open(DTRACE_VERSION, 0, &err)) == NULL)
|
||||
fatal("failed to initialize dtrace: %s\n",
|
||||
dtrace_errmsg(NULL, err));
|
||||
|
||||
/*
|
||||
* The longest string we trace is 23 bytes long -- so 32 is plenty.
|
||||
*/
|
||||
if (dtrace_setopt(g_dtp, "strsize", "32") == -1)
|
||||
dfatal("failed to set 'strsize'");
|
||||
|
||||
/*
|
||||
* 1k should be more than enough for all trace() and printa() actions.
|
||||
*/
|
||||
if (dtrace_setopt(g_dtp, "bufsize", "1k") == -1)
|
||||
dfatal("failed to set 'bufsize'");
|
||||
|
||||
/*
|
||||
* The table we produce has the hottest locks at the top.
|
||||
*/
|
||||
if (dtrace_setopt(g_dtp, "aggsortrev", NULL) == -1)
|
||||
dfatal("failed to set 'aggsortrev'");
|
||||
|
||||
/*
|
||||
* These are two reasonable defaults which should suffice.
|
||||
*/
|
||||
if (dtrace_setopt(g_dtp, "aggsize", "256k") == -1)
|
||||
dfatal("failed to set 'aggsize'");
|
||||
if (dtrace_setopt(g_dtp, "aggrate", "1sec") == -1)
|
||||
dfatal("failed to set 'aggrate'");
|
||||
|
||||
/*
|
||||
* Take a second pass through to look for options that set options now
|
||||
* that we have an open dtrace handle.
|
||||
*/
|
||||
optind = 1;
|
||||
while ((c = getopt(argc, argv, PLOCKSTAT_OPTSTR)) != EOF) {
|
||||
switch (c) {
|
||||
case 's':
|
||||
g_opt_s = 1;
|
||||
if (dtrace_setopt(g_dtp, "ustackframes", optarg) == -1)
|
||||
dfatal("failed to set 'ustackframes'");
|
||||
break;
|
||||
|
||||
case 'x':
|
||||
if ((p = strchr(optarg, '=')) != NULL)
|
||||
*p++ = '\0';
|
||||
|
||||
if (dtrace_setopt(g_dtp, optarg, p) != 0)
|
||||
dfatal("failed to set -x %s", optarg);
|
||||
break;
|
||||
|
||||
case 'e':
|
||||
errno = 0;
|
||||
(void) strtoul(optarg, &end, 10);
|
||||
if (*optarg == '-' || *end != '\0' || errno != 0) {
|
||||
(void) fprintf(stderr, "%s: invalid timeout "
|
||||
"'%s'\n", g_pname, optarg);
|
||||
usage();
|
||||
}
|
||||
|
||||
/*
|
||||
* Construct a DTrace enabling that will exit after
|
||||
* the specified number of seconds.
|
||||
*/
|
||||
dprog_add("BEGIN\n{\n\tend = timestamp + ");
|
||||
dprog_add(optarg);
|
||||
dprog_add(" * 1000000000;\n}\n");
|
||||
dprog_add("tick-10hz\n/timestamp >= end/\n");
|
||||
dprog_add("{\n\texit(0);\n}\n");
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
argc -= optind;
|
||||
argv += optind;
|
||||
|
||||
if (opt_H) {
|
||||
dprog_add(g_hold_init);
|
||||
if (g_opt_s == NULL)
|
||||
dprog_add(g_hold_times);
|
||||
else
|
||||
dprog_add(g_hold_histogram);
|
||||
}
|
||||
|
||||
if (opt_C) {
|
||||
dprog_add(g_ctnd_init);
|
||||
if (g_opt_s == NULL)
|
||||
dprog_add(g_ctnd_times);
|
||||
else
|
||||
dprog_add(g_ctnd_histogram);
|
||||
}
|
||||
|
||||
if (opt_p) {
|
||||
ulong_t pid;
|
||||
|
||||
if (argc > 1) {
|
||||
(void) fprintf(stderr, "%s: only one pid is allowed\n",
|
||||
g_pname);
|
||||
usage();
|
||||
}
|
||||
|
||||
errno = 0;
|
||||
pid = strtoul(argv[0], &end, 10);
|
||||
if (*end != '\0' || errno != 0 || (pid_t)pid != pid) {
|
||||
(void) fprintf(stderr, "%s: invalid pid '%s'\n",
|
||||
g_pname, argv[0]);
|
||||
usage();
|
||||
}
|
||||
|
||||
if ((g_pr = dtrace_proc_grab(g_dtp, (pid_t)pid, 0)) == NULL)
|
||||
dfatal(NULL);
|
||||
} else {
|
||||
if ((g_pr = dtrace_proc_create(g_dtp, argv[0], argv)) == NULL)
|
||||
dfatal(NULL);
|
||||
}
|
||||
|
||||
dprog_compile();
|
||||
|
||||
if (dtrace_handle_proc(g_dtp, &prochandler, NULL) == -1)
|
||||
dfatal("failed to establish proc handler");
|
||||
|
||||
(void) sigemptyset(&act.sa_mask);
|
||||
act.sa_flags = 0;
|
||||
act.sa_handler = intr;
|
||||
(void) sigaction(SIGINT, &act, NULL);
|
||||
(void) sigaction(SIGTERM, &act, NULL);
|
||||
|
||||
if (dtrace_go(g_dtp) != 0)
|
||||
dfatal("dtrace_go()");
|
||||
|
||||
if (dtrace_getopt(g_dtp, "ustackframes", &g_nframes) != 0)
|
||||
dfatal("failed to get 'ustackframes'");
|
||||
|
||||
dtrace_proc_continue(g_dtp, g_pr);
|
||||
|
||||
if (opt_v)
|
||||
(void) printf("%s: tracing enabled for pid %d\n", g_pname,
|
||||
(int)Pstatus(g_pr)->pr_pid);
|
||||
|
||||
do {
|
||||
if (!g_intr && !done)
|
||||
dtrace_sleep(g_dtp);
|
||||
|
||||
if (done || g_intr || g_exited) {
|
||||
done = 1;
|
||||
if (dtrace_stop(g_dtp) == -1)
|
||||
dfatal("couldn't stop tracing");
|
||||
}
|
||||
|
||||
switch (dtrace_work(g_dtp, stdout, NULL, chewrec, NULL)) {
|
||||
case DTRACE_WORKSTATUS_DONE:
|
||||
done = 1;
|
||||
break;
|
||||
case DTRACE_WORKSTATUS_OKAY:
|
||||
break;
|
||||
default:
|
||||
dfatal("processing aborted");
|
||||
}
|
||||
|
||||
} while (!done);
|
||||
|
||||
dtrace_close(g_dtp);
|
||||
|
||||
return (0);
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user