c5e0ba5fe4
specific to hp300. Since FreeBSD does not support hp300, hp300 has been removed from the condition altogether. The FP version broke profiling on powerpc due to invalid results. Casting to double instead of float resolved the issue, but with Book-E not having a FP unit, the non-FP version looked preferrable. Note that even on AIM hardware the FP version yielded an invalid value for s_scale, so the problem is most likely with the compiler or with the expression itself.
264 lines
6.9 KiB
C
264 lines
6.9 KiB
C
/*-
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* Copyright (c) 1983, 1992, 1993
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* The Regents of the University of California. 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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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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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#if defined(LIBC_SCCS) && !defined(lint)
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static char sccsid[] = "@(#)gmon.c 8.1 (Berkeley) 6/4/93";
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "namespace.h"
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#include <sys/param.h>
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#include <sys/time.h>
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#include <sys/gmon.h>
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#include <sys/sysctl.h>
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#include <err.h>
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#include <fcntl.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 <unistd.h>
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#include "un-namespace.h"
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#include "libc_private.h"
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#if defined(__i386__) || defined(__sparc64__) || defined(__amd64__) || defined(__powerpc__)
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extern char *minbrk __asm (".minbrk");
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#else
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extern char *minbrk __asm ("minbrk");
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#endif
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struct gmonparam _gmonparam = { GMON_PROF_OFF };
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static int s_scale;
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/* see profil(2) where this is describe (incorrectly) */
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#define SCALE_1_TO_1 0x10000L
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#define ERR(s) _write(2, s, sizeof(s))
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void moncontrol(int);
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static int hertz(void);
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void
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monstartup(lowpc, highpc)
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u_long lowpc;
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u_long highpc;
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{
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int o;
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char *cp;
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struct gmonparam *p = &_gmonparam;
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/*
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* round lowpc and highpc to multiples of the density we're using
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* so the rest of the scaling (here and in gprof) stays in ints.
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*/
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p->lowpc = ROUNDDOWN(lowpc, HISTFRACTION * sizeof(HISTCOUNTER));
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p->highpc = ROUNDUP(highpc, HISTFRACTION * sizeof(HISTCOUNTER));
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p->textsize = p->highpc - p->lowpc;
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p->kcountsize = p->textsize / HISTFRACTION;
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p->hashfraction = HASHFRACTION;
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p->fromssize = p->textsize / HASHFRACTION;
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p->tolimit = p->textsize * ARCDENSITY / 100;
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if (p->tolimit < MINARCS)
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p->tolimit = MINARCS;
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else if (p->tolimit > MAXARCS)
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p->tolimit = MAXARCS;
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p->tossize = p->tolimit * sizeof(struct tostruct);
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cp = sbrk(p->kcountsize + p->fromssize + p->tossize);
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if (cp == (char *)-1) {
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ERR("monstartup: out of memory\n");
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return;
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}
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#ifdef notdef
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bzero(cp, p->kcountsize + p->fromssize + p->tossize);
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#endif
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p->tos = (struct tostruct *)cp;
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cp += p->tossize;
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p->kcount = (u_short *)cp;
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cp += p->kcountsize;
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p->froms = (u_short *)cp;
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minbrk = sbrk(0);
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p->tos[0].link = 0;
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o = p->highpc - p->lowpc;
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if (p->kcountsize < o) {
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#if !defined(__powerpc__)
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s_scale = ((float)p->kcountsize / o ) * SCALE_1_TO_1;
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#else /* avoid floating point */
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int quot = o / p->kcountsize;
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if (quot >= 0x10000)
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s_scale = 1;
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else if (quot >= 0x100)
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s_scale = 0x10000 / quot;
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else if (o >= 0x800000)
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s_scale = 0x1000000 / (o / (p->kcountsize >> 8));
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else
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s_scale = 0x1000000 / ((o << 8) / p->kcountsize);
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#endif
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} else
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s_scale = SCALE_1_TO_1;
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moncontrol(1);
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}
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void
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_mcleanup(void)
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{
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int fd;
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int fromindex;
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int endfrom;
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u_long frompc;
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int toindex;
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struct rawarc rawarc;
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struct gmonparam *p = &_gmonparam;
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struct gmonhdr gmonhdr, *hdr;
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struct clockinfo clockinfo;
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char outname[128];
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int mib[2];
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size_t size;
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#ifdef DEBUG
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int log, len;
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char buf[200];
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#endif
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if (p->state == GMON_PROF_ERROR)
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ERR("_mcleanup: tos overflow\n");
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size = sizeof(clockinfo);
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mib[0] = CTL_KERN;
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mib[1] = KERN_CLOCKRATE;
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if (sysctl(mib, 2, &clockinfo, &size, NULL, 0) < 0) {
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/*
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* Best guess
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*/
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clockinfo.profhz = hertz();
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} else if (clockinfo.profhz == 0) {
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if (clockinfo.hz != 0)
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clockinfo.profhz = clockinfo.hz;
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else
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clockinfo.profhz = hertz();
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}
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moncontrol(0);
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snprintf(outname, sizeof(outname), "%s.gmon", _getprogname());
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fd = _open(outname, O_CREAT|O_TRUNC|O_WRONLY, 0666);
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if (fd < 0) {
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_warn("_mcleanup: %s", outname);
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return;
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}
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#ifdef DEBUG
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log = _open("gmon.log", O_CREAT|O_TRUNC|O_WRONLY, 0664);
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if (log < 0) {
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_warn("_mcleanup: gmon.log");
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return;
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}
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len = sprintf(buf, "[mcleanup1] kcount 0x%p ssiz %lu\n",
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p->kcount, p->kcountsize);
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_write(log, buf, len);
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#endif
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hdr = (struct gmonhdr *)&gmonhdr;
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bzero(hdr, sizeof(*hdr));
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hdr->lpc = p->lowpc;
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hdr->hpc = p->highpc;
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hdr->ncnt = p->kcountsize + sizeof(gmonhdr);
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hdr->version = GMONVERSION;
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hdr->profrate = clockinfo.profhz;
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_write(fd, (char *)hdr, sizeof *hdr);
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_write(fd, p->kcount, p->kcountsize);
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endfrom = p->fromssize / sizeof(*p->froms);
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for (fromindex = 0; fromindex < endfrom; fromindex++) {
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if (p->froms[fromindex] == 0)
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continue;
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frompc = p->lowpc;
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frompc += fromindex * p->hashfraction * sizeof(*p->froms);
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for (toindex = p->froms[fromindex]; toindex != 0;
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toindex = p->tos[toindex].link) {
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#ifdef DEBUG
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len = sprintf(buf,
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"[mcleanup2] frompc 0x%lx selfpc 0x%lx count %lu\n" ,
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frompc, p->tos[toindex].selfpc,
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p->tos[toindex].count);
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_write(log, buf, len);
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#endif
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rawarc.raw_frompc = frompc;
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rawarc.raw_selfpc = p->tos[toindex].selfpc;
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rawarc.raw_count = p->tos[toindex].count;
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_write(fd, &rawarc, sizeof rawarc);
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}
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}
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_close(fd);
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}
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/*
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* Control profiling
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* profiling is what mcount checks to see if
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* all the data structures are ready.
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*/
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void
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moncontrol(mode)
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int mode;
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{
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struct gmonparam *p = &_gmonparam;
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if (mode) {
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/* start */
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profil((char *)p->kcount, p->kcountsize, p->lowpc, s_scale);
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p->state = GMON_PROF_ON;
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} else {
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/* stop */
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profil((char *)0, 0, 0, 0);
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p->state = GMON_PROF_OFF;
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}
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}
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/*
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* discover the tick frequency of the machine
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* if something goes wrong, we return 0, an impossible hertz.
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*/
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static int
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hertz()
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{
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struct itimerval tim;
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tim.it_interval.tv_sec = 0;
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tim.it_interval.tv_usec = 1;
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tim.it_value.tv_sec = 0;
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tim.it_value.tv_usec = 0;
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setitimer(ITIMER_REAL, &tim, 0);
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setitimer(ITIMER_REAL, 0, &tim);
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if (tim.it_interval.tv_usec < 2)
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return(0);
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return (1000000 / tim.it_interval.tv_usec);
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}
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