/* * Copyright (c) 1998, 1999 University of Utah and the Flux Group. * All rights reserved. * * This file is part of the Flux OSKit. The OSKit is free software, also known * as "open source;" you can redistribute it and/or modify it under the terms * of the GNU General Public License (GPL), version 2, as published by the Free * Software Foundation (FSF). To explore alternate licensing terms, contact * the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271. * * The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS * FOR A PARTICULAR PURPOSE. See the GPL for more details. You should have * received a copy of the GPL along with the OSKit; see the file COPYING. If * not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA. */ /*- * Copyright (c) 1983, 1992, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifdef GPROF #if !defined(lint) && defined(LIBC_SCCS) static char sccsid[] = "@(#)gmon.c 8.1 (Berkeley) 6/4/93"; #endif #ifndef OSKIT #include #else #include #endif #include #ifndef OSKIT #include #include #else #include #endif #include #include #include #ifdef OSKIT #include #include #include #include #include #include #include #include #include #include #include #define u_long unsigned long #define u_short unsigned short #endif #if defined(__ELF__) extern char *minbrk asm (".minbrk"); #else extern char *minbrk asm ("minbrk"); #endif struct gmonparam _gmonparam = { GMON_PROF_OFF }; #ifdef OSKIT int GPROF_ENABLED = 0; #endif static int s_scale; /* see profil(2) where this is describe (incorrectly) */ #define SCALE_1_TO_1 0x10000L #define ERR(s) write(2, s, sizeof(s)) #ifdef OSKIT void moncontrol(int mode); #else void moncontrol __P((int)); static int hertz __P((void)); #endif void monstartup(lowpc, highpc) u_long lowpc; u_long highpc; { register int o; char *cp; struct gmonparam *p = &_gmonparam; /* * round lowpc and highpc to multiples of the density we're using * so the rest of the scaling (here and in gprof) stays in ints. */ p->lowpc = ROUNDDOWN(lowpc, HISTFRACTION * sizeof(HISTCOUNTER)); p->highpc = ROUNDUP(highpc, HISTFRACTION * sizeof(HISTCOUNTER)); p->textsize = p->highpc - p->lowpc; p->kcountsize = p->textsize / HISTFRACTION; p->hashfraction = HASHFRACTION; p->fromssize = p->textsize / HASHFRACTION; p->tolimit = p->textsize * ARCDENSITY / 100; if (p->tolimit < MINARCS) p->tolimit = MINARCS; else if (p->tolimit > MAXARCS) p->tolimit = MAXARCS; p->tossize = p->tolimit * sizeof(struct tostruct); #ifdef OSKIT cp = calloc(1, (p->kcountsize + p->fromssize + p->tossize)); if (cp == NULL) { #else cp = sbrk(p->kcountsize + p->fromssize + p->tossize); if (cp == (char *)-1) { #endif ERR("monstartup: out of memory\n"); return; } p->tos = (struct tostruct *)cp; cp += p->tossize; p->kcount = (HISTCOUNTER *)cp; cp += p->kcountsize; p->froms = (u_short *)cp; #ifndef OSKIT minbrk = sbrk(0); #endif p->tos[0].link = 0; o = p->highpc - p->lowpc; if (p->kcountsize < o) { #ifndef hp300 s_scale = ((float)p->kcountsize / o ) * SCALE_1_TO_1; #else /* avoid floating point */ int quot = o / p->kcountsize; if (quot >= 0x10000) s_scale = 1; else if (quot >= 0x100) s_scale = 0x10000 / quot; else if (o >= 0x800000) s_scale = 0x1000000 / (o / (p->kcountsize >> 8)); else s_scale = 0x1000000 / ((o << 8) / p->kcountsize); #endif } else s_scale = SCALE_1_TO_1; moncontrol(1); } void _mcleanup() { int fd; int fromindex; int endfrom; u_long frompc; int toindex; struct rawarc rawarc; struct gmonparam *p = &_gmonparam; struct gmonhdr gmonhdr, *hdr; #ifndef OSKIT struct clockinfo clockinfo; int mib[2]; size_t size; #endif #ifdef DEBUG int log, len; char buf[200]; #endif if (p->state == GMON_PROF_ERROR) ERR("_mcleanup: tos overflow\n"); #ifndef OSKIT size = sizeof(clockinfo); mib[0] = CTL_KERN; mib[1] = KERN_CLOCKRATE; if (sysctl(mib, 2, &clockinfo, &size, NULL, 0) < 0) { /* * Best guess */ clockinfo.profhz = hertz(); } else if (clockinfo.profhz == 0) { if (clockinfo.hz != 0) clockinfo.profhz = clockinfo.hz; else clockinfo.profhz = hertz(); } #endif moncontrol(0); fd = open("gmon.out", O_CREAT|O_TRUNC|O_WRONLY, 0666); if (fd < 0) { perror("mcount: gmon.out"); return; } #ifdef OSKIT else { printf("Opened gmon.out successfully\n"); } #endif #ifdef DEBUG log = open("gmon.log", O_CREAT|O_TRUNC|O_WRONLY, 0664); if (log < 0) { perror("mcount: gmon.log"); return; } len = sprintf(buf, "[mcleanup1] kcount 0x%x ssiz %d\n", p->kcount, p->kcountsize); write(log, buf, len); #endif hdr = (struct gmonhdr *)&gmonhdr; hdr->lpc = p->lowpc; hdr->hpc = p->highpc; hdr->ncnt = p->kcountsize + sizeof(gmonhdr); hdr->version = GMONVERSION; #ifdef OSKIT hdr->profrate = OSKIT_PROFHZ; #else hdr->profrate = clockinfo.profhz; #endif write(fd, (char *)hdr, sizeof *hdr); write(fd, p->kcount, p->kcountsize); endfrom = p->fromssize / sizeof(*p->froms); for (fromindex = 0; fromindex < endfrom; fromindex++) { if (p->froms[fromindex] == 0) continue; frompc = p->lowpc; frompc += fromindex * p->hashfraction * sizeof(*p->froms); for (toindex = p->froms[fromindex]; toindex != 0; toindex = p->tos[toindex].link) { #ifdef OSKIT assert(toindex < p->tolimit); #endif #ifdef DEBUG len = sprintf(buf, "[mcleanup2] frompc 0x%x selfpc 0x%x count %d\n" , frompc, p->tos[toindex].selfpc, p->tos[toindex].count); write(log, buf, len); #endif rawarc.raw_frompc = frompc; rawarc.raw_selfpc = p->tos[toindex].selfpc; rawarc.raw_count = p->tos[toindex].count; write(fd, &rawarc, sizeof rawarc); } } #ifdef OSKIT #ifdef DEBUG fsync(log); close(log); #endif fsync(fd); #endif close(fd); } /* * Control profiling * profiling is what mcount checks to see if * all the data structures are ready. */ void moncontrol(mode) int mode; { struct gmonparam *p = &_gmonparam; if (mode) { /* start */ profil((char *)p->kcount, p->kcountsize, (int)p->lowpc, s_scale); p->state = GMON_PROF_ON; } else { /* stop */ profil((char *)0, 0, 0, 0); p->state = GMON_PROF_OFF; } } #ifndef OSKIT /* * discover the tick frequency of the machine * if something goes wrong, we return 0, an impossible hertz. */ static int hertz() { struct itimerval tim; tim.it_interval.tv_sec = 0; tim.it_interval.tv_usec = 1; tim.it_value.tv_sec = 0; tim.it_value.tv_usec = 0; setitimer(ITIMER_REAL, &tim, 0); setitimer(ITIMER_REAL, 0, &tim); if (tim.it_interval.tv_usec < 2) return(0); return (1000000 / tim.it_interval.tv_usec); } #endif #endif /* GPROF */