Tue Sep 26 16:50:17 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>

	* gmon: New directory of profiling code, incorporated from
	4.4BSD-Lite and modified.
	* sysdeps/i386/machine-gmon.h: New file.
	* sysdeps/stub/machine-gmon.h: New file.
	* sysdeps/mach/hurd/profil.c: New file.
	* sysdeps/stub/profil.c: New file.
	* sysdeps/unix/bsd/profil.S: New file.
	* Makefile (subdirs): Add gmon.
	* csu/gmon-start.c: New file.
	* csu/Makefile (extra-objs): Add gmon-start.o,
	g$(start-installed-name).
	(install-lib, omit-deps): Add g$(start-installed-name).
	($(objpfx)g$(start-installed-name)): New target.

1 files changed, 232 insertions, 0 deletions

diff --git a/gmon/gmon.c b/gmon/gmon.c
new file mode 100644
index 0000000000..df528e259f
--- /dev/null
+++ b/gmon/gmon.c
@@ -0,0 +1,232 @@
+/*-
+ * 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.
+ */
+
+#if !defined(lint) && defined(LIBC_SCCS)
+static char sccsid[] = "@(#)gmon.c	8.1 (Berkeley) 6/4/93";
+#endif
+
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/gmon.h>
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+struct gmonparam _gmonparam = { GMON_PROF_OFF };
+
+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) - 1)
+
+void	moncontrol __P((int));
+static int hertz __P((void));
+
+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);
+
+	cp = malloc (p->kcountsize + p->fromssize + p->tossize);
+	if (! cp) {
+		ERR("monstartup: out of memory\n");
+		return;
+	}
+	bzero(cp, p->kcountsize + p->fromssize + p->tossize);
+	p->tos = (struct tostruct *)cp;
+	cp += p->tossize;
+	p->kcount = (u_short *)cp;
+	cp += p->kcountsize;
+	p->froms = (u_short *)cp;
+
+	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;
+#ifdef DEBUG
+	int log, len;
+	char buf[200];
+#endif
+
+	if (p->state == GMON_PROF_ERROR)
+		ERR("_mcleanup: tos overflow\n");
+
+	moncontrol(0);
+	fd = open("gmon.out", O_CREAT|O_TRUNC|O_WRONLY, 0666);
+	if (fd < 0) {
+		perror("mcount: gmon.out");
+		return;
+	}
+#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;
+	hdr->profrate = hertz();
+	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 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);
+		}
+	}
+	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;
+	}
+}
+
+/*
+ * 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);
+}
+
+