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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (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 1989 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
/*
* Environment variable PROFDIR added such that:
* If PROFDIR doesn't exist, "mon.out" is produced as before.
* If PROFDIR = NULL, no profiling output is produced.
* If PROFDIR = string, "string/pid.progname" is produced,
* where name consists of argv[0] suitably massaged.
*/
#include <sys/param.h>
#include <sys/dir.h>
#include "mon.h"
#include <sys/fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#define PROFDIR "PROFDIR"
extern void profil(), perror();
void monitor(char *, char *, char *, int, int);
void moncontrol(int);
char **___Argv = NULL; /* initialized to argv array by mcrt0 (if loaded) */
struct cnt *countbase;
int numctrs;
int profiling;
static struct mondata {
char *s_sbuf;
int s_bufsiz;
int s_scale;
int s_lowpc;
char mon_out[MAXPATHLEN];
char progname[MAXNAMLEN];
} *mondata, *_mondata();
#define MSG "No space for monitor buffer(s)\n"
static struct mondata *
_mondata(void)
{
struct mondata *d = mondata;
if (d == 0) {
if ((d = (struct mondata *)
calloc(1, sizeof(struct mondata))) == NULL) {
return (NULL);
}
mondata = d;
}
return (d);
}
void
monstartup(char *lowpc, char *highpc)
{
int monsize;
char *buffer;
int cntsiz;
char *_alloc_profil_buf();
cntsiz = (highpc - lowpc) * ARCDENSITY / 100;
if (cntsiz < MINARCS)
cntsiz = MINARCS;
monsize = (highpc - lowpc + HISTFRACTION - 1) / HISTFRACTION
+ sizeof(struct phdr) + cntsiz * sizeof(struct cnt);
buffer = _alloc_profil_buf(monsize);
if (buffer == (char *)-1) {
write(2, MSG, sizeof(MSG));
return;
}
monitor(lowpc, highpc, buffer, monsize, cntsiz);
}
/*
* Arguments
* lowpc, hightpc: boundaries of text to be monitored
* buf: ptr to space for monitor data (WORDs)
* bufsiz: size of above space (in WORDs)
* cntsiz: max no. of functions whose calls are counted
*/
void
monitor(char *lowpc, char *highpc, char *buf, int bufsiz, int cntsiz)
{
struct mondata *d = _mondata();
int o;
struct phdr *php;
static int ssiz;
static char *sbuf;
char *s, *name;
name = d->mon_out;
if (lowpc == NULL) { /* true only at the end */
moncontrol(0);
if (sbuf != NULL) {
int pid, n;
if (d->progname[0] != '\0') { /* finish constructing
"PROFDIR/pid.progname" */
/* set name to end of PROFDIR */
name = strrchr(d->mon_out, '\0');
if ((pid = getpid()) <= 0) /* extra test just in case */
pid = 1; /* getpid returns something inappropriate */
for (n = 10000; n > pid; n /= 10)
; /* suppress leading zeros */
for ( ; ; n /= 10) {
*name++ = pid/n + '0';
if (n == 1)
break;
pid %= n;
}
*name++ = '.';
(void)strcpy(name, d->progname);
}
if ((o = creat(d->mon_out, 0666)) < 0 ||
write(o, sbuf, (unsigned)ssiz) == -1)
perror(d->mon_out);
if (o >= 0)
close(o);
}
return;
}
countbase = (struct cnt *)(buf + sizeof(struct phdr));
sbuf = NULL;
o = sizeof(struct phdr) + cntsiz * sizeof(struct cnt);
if (ssiz >= bufsiz || lowpc >= highpc)
return; /* buffer too small or PC range bad */
if ((s = getenv(PROFDIR)) == NULL) /* PROFDIR not in environment */
(void)strcpy(name, MON_OUT); /* use default "mon.out" */
else if (*s == '\0') /* value of PROFDIR is NULL */
return; /* no profiling on this run */
else { /* set up mon_out and progname to construct
"PROFDIR/pid.progname" when done profiling */
while (*s != '\0') /* copy PROFDIR value (path-prefix) */
*name++ = *s++;
*name++ = '/'; /* two slashes won't hurt */
if (___Argv != NULL) /* mcrt0.s executed */
if ((s = strrchr(___Argv[0], '/')) != NULL)
strcpy(d->progname, s + 1);
else
strcpy(d->progname, ___Argv[0]);
}
sbuf = buf; /* for writing buffer at the wrapup */
ssiz = bufsiz;
php = (struct phdr *)&buf[0];
php->lpc = (char *)lowpc; /* initialize the first */
php->hpc = (char *)highpc; /* region of the buffer */
php->ncnt = cntsiz;
numctrs = cntsiz;
buf += o;
bufsiz -= o;
if (bufsiz <= 0)
return;
o = (highpc - lowpc);
if(bufsiz < o)
o = ((float) bufsiz / o) * 65536;
else
o = 65536;
d->s_scale = o;
d->s_sbuf = buf;
d->s_bufsiz = bufsiz;
d->s_lowpc = (int) lowpc;
moncontrol(1);
}
/*
* Control profiling
* profiling is what mcount checks to see if
* all the data structures are ready.
*/
void
moncontrol(int mode)
{
struct mondata *d = _mondata();
if (mode) {
/* start */
profil(d->s_sbuf, d->s_bufsiz, d->s_lowpc, d->s_scale);
profiling = 0;
} else {
/* stop */
profil((char *)0, 0, 0, 0);
profiling = 3;
}
}
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