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authorRui Paulo <rpaulo@FreeBSD.org>2010-07-19 14:57:01 +0000
committerRui Paulo <rpaulo@FreeBSD.org>2010-07-19 14:57:01 +0000
commit37ddcfe2bb1d3b458470402a871a52af23e260e6 (patch)
tree6d82fd572fa210d2b3761914d8be0c7c4360c522
parent622d1d89ae286ec7879e2dba74c26f7958b3fa52 (diff)
downloadsrc-37ddcfe2bb1d3b458470402a871a52af23e260e6.tar.gz
src-37ddcfe2bb1d3b458470402a871a52af23e260e6.zip
Import plockstat from OpenSolaris r12768.
Notes
Notes: svn path=/vendor/opensolaris/dist/; revision=210236
-rw-r--r--cmd/plockstat/plockstat.c996
1 files changed, 996 insertions, 0 deletions
diff --git a/cmd/plockstat/plockstat.c b/cmd/plockstat/plockstat.c
new file mode 100644
index 000000000000..0dfd7004fed2
--- /dev/null
+++ b/cmd/plockstat/plockstat.c
@@ -0,0 +1,996 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident "%Z%%M% %I% %E% SMI"
+
+#include <assert.h>
+#include <dtrace.h>
+#include <limits.h>
+#include <link.h>
+#include <priv.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <string.h>
+#include <strings.h>
+#include <errno.h>
+#include <sys/wait.h>
+#include <libgen.h>
+#include <libproc.h>
+
+static char *g_pname;
+static dtrace_hdl_t *g_dtp;
+struct ps_prochandle *g_pr;
+
+#define E_SUCCESS 0
+#define E_ERROR 1
+#define E_USAGE 2
+
+/*
+ * For hold times we use a global associative array since for mutexes, in
+ * user-land, it's not invalid to release a sychonization primitive that
+ * another thread acquired; rwlocks require a thread-local associative array
+ * since multiple thread can hold the same lock for reading. Note that we
+ * ignore recursive mutex acquisitions and releases as they don't truly
+ * affect lock contention.
+ */
+static const char *g_hold_init =
+"plockstat$target:::rw-acquire\n"
+"{\n"
+" self->rwhold[arg0] = timestamp;\n"
+"}\n"
+"plockstat$target:::mutex-acquire\n"
+"/arg1 == 0/\n"
+"{\n"
+" mtxhold[arg0] = timestamp;\n"
+"}\n";
+
+static const char *g_hold_histogram =
+"plockstat$target:::rw-release\n"
+"/self->rwhold[arg0] && arg1 == 1/\n"
+"{\n"
+" @rw_w_hold[arg0, ustack()] =\n"
+" quantize(timestamp - self->rwhold[arg0]);\n"
+" self->rwhold[arg0] = 0;\n"
+" rw_w_hold_found = 1;\n"
+"}\n"
+"plockstat$target:::rw-release\n"
+"/self->rwhold[arg0]/\n"
+"{\n"
+" @rw_r_hold[arg0, ustack()] =\n"
+" quantize(timestamp - self->rwhold[arg0]);\n"
+" self->rwhold[arg0] = 0;\n"
+" rw_r_hold_found = 1;\n"
+"}\n"
+"plockstat$target:::mutex-release\n"
+"/mtxhold[arg0] && arg1 == 0/\n"
+"{\n"
+" @mtx_hold[arg0, ustack()] = quantize(timestamp - mtxhold[arg0]);\n"
+" mtxhold[arg0] = 0;\n"
+" mtx_hold_found = 1;\n"
+"}\n"
+"\n"
+"END\n"
+"/mtx_hold_found/\n"
+"{\n"
+" trace(\"Mutex hold\");\n"
+" printa(@mtx_hold);\n"
+"}\n"
+"END\n"
+"/rw_r_hold_found/\n"
+"{\n"
+" trace(\"R/W reader hold\");\n"
+" printa(@rw_r_hold);\n"
+"}\n"
+"END\n"
+"/rw_w_hold_found/\n"
+"{\n"
+" trace(\"R/W writer hold\");\n"
+" printa(@rw_w_hold);\n"
+"}\n";
+
+static const char *g_hold_times =
+"plockstat$target:::rw-release\n"
+"/self->rwhold[arg0] && arg1 == 1/\n"
+"{\n"
+" @rw_w_hold[arg0, ustack(5)] = sum(timestamp - self->rwhold[arg0]);\n"
+" @rw_w_hold_count[arg0, ustack(5)] = count();\n"
+" self->rwhold[arg0] = 0;\n"
+" rw_w_hold_found = 1;\n"
+"}\n"
+"plockstat$target:::rw-release\n"
+"/self->rwhold[arg0]/\n"
+"{\n"
+" @rw_r_hold[arg0, ustack(5)] = sum(timestamp - self->rwhold[arg0]);\n"
+" @rw_r_hold_count[arg0, ustack(5)] = count();\n"
+" self->rwhold[arg0] = 0;\n"
+" rw_r_hold_found = 1;\n"
+"}\n"
+"plockstat$target:::mutex-release\n"
+"/mtxhold[arg0] && arg1 == 0/\n"
+"{\n"
+" @mtx_hold[arg0, ustack(5)] = sum(timestamp - mtxhold[arg0]);\n"
+" @mtx_hold_count[arg0, ustack(5)] = count();\n"
+" mtxhold[arg0] = 0;\n"
+" mtx_hold_found = 1;\n"
+"}\n"
+"\n"
+"END\n"
+"/mtx_hold_found/\n"
+"{\n"
+" trace(\"Mutex hold\");\n"
+" printa(@mtx_hold, @mtx_hold_count);\n"
+"}\n"
+"END\n"
+"/rw_r_hold_found/\n"
+"{\n"
+" trace(\"R/W reader hold\");\n"
+" printa(@rw_r_hold, @rw_r_hold_count);\n"
+"}\n"
+"END\n"
+"/rw_w_hold_found/\n"
+"{\n"
+" trace(\"R/W writer hold\");\n"
+" printa(@rw_w_hold, @rw_w_hold_count);\n"
+"}\n";
+
+
+/*
+ * For contention, we use thread-local associative arrays since we're tracing
+ * a single thread's activity in libc and multiple threads can be blocking or
+ * spinning on the same sychonization primitive.
+ */
+static const char *g_ctnd_init =
+"plockstat$target:::rw-block\n"
+"{\n"
+" self->rwblock[arg0] = timestamp;\n"
+"}\n"
+"plockstat$target:::mutex-block\n"
+"{\n"
+" self->mtxblock[arg0] = timestamp;\n"
+"}\n"
+"plockstat$target:::mutex-spin\n"
+"{\n"
+" self->mtxspin[arg0] = timestamp;\n"
+"}\n";
+
+static const char *g_ctnd_histogram =
+"plockstat$target:::rw-blocked\n"
+"/self->rwblock[arg0] && arg1 == 1 && arg2 != 0/\n"
+"{\n"
+" @rw_w_block[arg0, ustack()] =\n"
+" quantize(timestamp - self->rwblock[arg0]);\n"
+" self->rwblock[arg0] = 0;\n"
+" rw_w_block_found = 1;\n"
+"}\n"
+"plockstat$target:::rw-blocked\n"
+"/self->rwblock[arg0] && arg2 != 0/\n"
+"{\n"
+" @rw_r_block[arg0, ustack()] =\n"
+" quantize(timestamp - self->rwblock[arg0]);\n"
+" self->rwblock[arg0] = 0;\n"
+" rw_r_block_found = 1;\n"
+"}\n"
+"plockstat$target:::rw-blocked\n"
+"/self->rwblock[arg0]/\n"
+"{\n"
+" self->rwblock[arg0] = 0;\n"
+"}\n"
+"plockstat$target:::mutex-spun\n"
+"/self->mtxspin[arg0] && arg1 != 0/\n"
+"{\n"
+" @mtx_spin[arg0, ustack()] =\n"
+" quantize(timestamp - self->mtxspin[arg0]);\n"
+" self->mtxspin[arg0] = 0;\n"
+" mtx_spin_found = 1;\n"
+"}\n"
+"plockstat$target:::mutex-spun\n"
+"/self->mtxspin[arg0]/\n"
+"{\n"
+" @mtx_vain_spin[arg0, ustack()] =\n"
+" quantize(timestamp - self->mtxspin[arg0]);\n"
+" self->mtxspin[arg0] = 0;\n"
+" mtx_vain_spin_found = 1;\n"
+"}\n"
+"plockstat$target:::mutex-blocked\n"
+"/self->mtxblock[arg0] && arg1 != 0/\n"
+"{\n"
+" @mtx_block[arg0, ustack()] =\n"
+" quantize(timestamp - self->mtxblock[arg0]);\n"
+" self->mtxblock[arg0] = 0;\n"
+" mtx_block_found = 1;\n"
+"}\n"
+"plockstat$target:::mutex-blocked\n"
+"/self->mtxblock[arg0]/\n"
+"{\n"
+" self->mtxblock[arg0] = 0;\n"
+"}\n"
+"\n"
+"END\n"
+"/mtx_block_found/\n"
+"{\n"
+" trace(\"Mutex block\");\n"
+" printa(@mtx_block);\n"
+"}\n"
+"END\n"
+"/mtx_spin_found/\n"
+"{\n"
+" trace(\"Mutex spin\");\n"
+" printa(@mtx_spin);\n"
+"}\n"
+"END\n"
+"/mtx_vain_spin_found/\n"
+"{\n"
+" trace(\"Mutex unsuccessful spin\");\n"
+" printa(@mtx_vain_spin);\n"
+"}\n"
+"END\n"
+"/rw_r_block_found/\n"
+"{\n"
+" trace(\"R/W reader block\");\n"
+" printa(@rw_r_block);\n"
+"}\n"
+"END\n"
+"/rw_w_block_found/\n"
+"{\n"
+" trace(\"R/W writer block\");\n"
+" printa(@rw_w_block);\n"
+"}\n";
+
+
+static const char *g_ctnd_times =
+"plockstat$target:::rw-blocked\n"
+"/self->rwblock[arg0] && arg1 == 1 && arg2 != 0/\n"
+"{\n"
+" @rw_w_block[arg0, ustack(5)] =\n"
+" sum(timestamp - self->rwblock[arg0]);\n"
+" @rw_w_block_count[arg0, ustack(5)] = count();\n"
+" self->rwblock[arg0] = 0;\n"
+" rw_w_block_found = 1;\n"
+"}\n"
+"plockstat$target:::rw-blocked\n"
+"/self->rwblock[arg0] && arg2 != 0/\n"
+"{\n"
+" @rw_r_block[arg0, ustack(5)] =\n"
+" sum(timestamp - self->rwblock[arg0]);\n"
+" @rw_r_block_count[arg0, ustack(5)] = count();\n"
+" self->rwblock[arg0] = 0;\n"
+" rw_r_block_found = 1;\n"
+"}\n"
+"plockstat$target:::rw-blocked\n"
+"/self->rwblock[arg0]/\n"
+"{\n"
+" self->rwblock[arg0] = 0;\n"
+"}\n"
+"plockstat$target:::mutex-spun\n"
+"/self->mtxspin[arg0] && arg1 != 0/\n"
+"{\n"
+" @mtx_spin[arg0, ustack(5)] =\n"
+" sum(timestamp - self->mtxspin[arg0]);\n"
+" @mtx_spin_count[arg0, ustack(5)] = count();\n"
+" self->mtxspin[arg0] = 0;\n"
+" mtx_spin_found = 1;\n"
+"}\n"
+"plockstat$target:::mutex-spun\n"
+"/self->mtxspin[arg0]/\n"
+"{\n"
+" @mtx_vain_spin[arg0, ustack(5)] =\n"
+" sum(timestamp - self->mtxspin[arg0]);\n"
+" @mtx_vain_spin_count[arg0, ustack(5)] = count();\n"
+" self->mtxspin[arg0] = 0;\n"
+" mtx_vain_spin_found = 1;\n"
+"}\n"
+"plockstat$target:::mutex-blocked\n"
+"/self->mtxblock[arg0] && arg1 != 0/\n"
+"{\n"
+" @mtx_block[arg0, ustack(5)] =\n"
+" sum(timestamp - self->mtxblock[arg0]);\n"
+" @mtx_block_count[arg0, ustack(5)] = count();\n"
+" self->mtxblock[arg0] = 0;\n"
+" mtx_block_found = 1;\n"
+"}\n"
+"plockstat$target:::mutex-blocked\n"
+"/self->mtxblock[arg0]/\n"
+"{\n"
+" self->mtxblock[arg0] = 0;\n"
+"}\n"
+"\n"
+"END\n"
+"/mtx_block_found/\n"
+"{\n"
+" trace(\"Mutex block\");\n"
+" printa(@mtx_block, @mtx_block_count);\n"
+"}\n"
+"END\n"
+"/mtx_spin_found/\n"
+"{\n"
+" trace(\"Mutex spin\");\n"
+" printa(@mtx_spin, @mtx_spin_count);\n"
+"}\n"
+"END\n"
+"/mtx_vain_spin_found/\n"
+"{\n"
+" trace(\"Mutex unsuccessful spin\");\n"
+" printa(@mtx_vain_spin, @mtx_vain_spin_count);\n"
+"}\n"
+"END\n"
+"/rw_r_block_found/\n"
+"{\n"
+" trace(\"R/W reader block\");\n"
+" printa(@rw_r_block, @rw_r_block_count);\n"
+"}\n"
+"END\n"
+"/rw_w_block_found/\n"
+"{\n"
+" trace(\"R/W writer block\");\n"
+" printa(@rw_w_block, @rw_w_block_count);\n"
+"}\n";
+
+static char g_prog[4096];
+static size_t g_proglen;
+static int g_opt_V, g_opt_s;
+static int g_intr;
+static int g_exited;
+static dtrace_optval_t g_nframes;
+static ulong_t g_nent = ULONG_MAX;
+
+#define PLOCKSTAT_OPTSTR "n:ps:e:vx:ACHV"
+
+static void
+usage(void)
+{
+ (void) fprintf(stderr, "Usage:\n"
+ "\t%s [-vACHV] [-n count] [-s depth] [-e secs] [-x opt[=val]]\n"
+ "\t command [arg...]\n"
+ "\t%s [-vACHV] [-n count] [-s depth] [-e secs] [-x opt[=val]]\n"
+ "\t -p pid\n", g_pname, g_pname);
+
+ exit(E_USAGE);
+}
+
+static void
+verror(const char *fmt, va_list ap)
+{
+ int error = errno;
+
+ (void) fprintf(stderr, "%s: ", g_pname);
+ (void) vfprintf(stderr, fmt, ap);
+
+ if (fmt[strlen(fmt) - 1] != '\n')
+ (void) fprintf(stderr, ": %s\n", strerror(error));
+}
+
+/*PRINTFLIKE1*/
+static void
+fatal(const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ verror(fmt, ap);
+ va_end(ap);
+
+ if (g_pr != NULL && g_dtp != NULL)
+ dtrace_proc_release(g_dtp, g_pr);
+
+ exit(E_ERROR);
+}
+
+/*PRINTFLIKE1*/
+static void
+dfatal(const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+
+ (void) fprintf(stderr, "%s: ", g_pname);
+ if (fmt != NULL)
+ (void) vfprintf(stderr, fmt, ap);
+
+ va_end(ap);
+
+ if (fmt != NULL && fmt[strlen(fmt) - 1] != '\n') {
+ (void) fprintf(stderr, ": %s\n",
+ dtrace_errmsg(g_dtp, dtrace_errno(g_dtp)));
+ } else if (fmt == NULL) {
+ (void) fprintf(stderr, "%s\n",
+ dtrace_errmsg(g_dtp, dtrace_errno(g_dtp)));
+ }
+
+ if (g_pr != NULL) {
+ dtrace_proc_continue(g_dtp, g_pr);
+ dtrace_proc_release(g_dtp, g_pr);
+ }
+
+ 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);
+}