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

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* 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.
This commit is contained in:
Roland McGrath 1995-09-26 20:59:38 +00:00
parent e11c394911
commit 11c981a96d
14 changed files with 963 additions and 9 deletions
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16
ChangeLog
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@ -1,3 +1,19 @@
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.
Fri Sep 22 14:24:25 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
* sysdeps/mach/hurd/Makefile: Elide sunrpc from $(subdirs) for the

2
Makefile
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@ -53,7 +53,7 @@ endif
# These are the subdirectories containing the library source.
subdirs := csu assert ctype locale math setjmp signal stdio stdlib \
malloc string time dirent grp pwd posix io termios resource \
misc socket sysvipc gnulib $(wildcard crypt) manual \
misc socket sysvipc gmon gnulib $(wildcard crypt) manual \
$(sysdep-subdirs) elf
export subdirs := $(subdirs) # Benign, useless in GNU make before 3.63.

25
csu/Makefile
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@ -20,18 +20,21 @@
# This directory contains the C startup code (that which calls main). This
# consists of the startfile, built from start.c and installed as crt0.o
# (traditionally) or crt1.o (for ELF); and some initialization code which
# is in the C library itself. In ELF we also install crti.o and crtn.o,
# special "initializer" and "finalizer" files in used in the link to make
# the .init and .fini sections work right; both these files are built (in
# an arcane manner) from initfini.c.
# (traditionally) or crt1.o (for ELF). In ELF we also install crti.o and
# crtn.o, special "initializer" and "finalizer" files in used in the link
# to make the .init and .fini sections work right; both these files are
# built (in an arcane manner) from initfini.c.
subdir := csu
csu-dummies = $(filter-out $(start-installed-name),crt1.o Mcrt1.o)
extra-objs = start.o $(start-installed-name) $(csu-dummies)
omit-deps = $(patsubst %.o,%,$(start-installed-name) $(csu-dummies))
install-lib = $(start-installed-name) $(csu-dummies)
extra-objs = start.o gmon-start.o \
$(start-installed-name) g$(start-installed-name) \
$(csu-dummies)
omit-deps = $(patsubst %.o,%,$(start-installed-name) g$(start-installed-name) \
$(csu-dummies))
install-lib = $(start-installed-name) g$(start-installed-name) \
$(csu-dummies)
distribute = initfini.c
all: # Make this the default target; it will be defined in Rules.
@ -95,6 +98,12 @@ $(objpfx)$(start-installed-name): $(objpfx)start.o
ln $< $@
endif
# The profiling startfile is made by linking together the normal
# startfile with gmon-start.o, which defines a constructor function
# to turn on profiling code at startup.
$(objpfx)g$(start-installed-name): $(objpfx)start.o $(objpfx)gmon-start.o
$(CC) -nostdlib -nostartfiles -r -o $@ $^
# These extra files are sometimes expected by system standard linking
# procedures, but we have nothing for them to do. So compile empty files.
$(addprefix $(objpfx),$(filter-out $(start-installed-name),$(csu-dummies))):

47
csu/gmon-start.c Normal file
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@ -0,0 +1,47 @@
/* Code to enable profiling at program startup.
Copyright (C) 1995 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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 GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <sys/types.h>
#include <sys/gmon.h>
#include <stdlib.h>
#include <unistd.h>
/* Beginning and end of our code segment. */
extern void _start (), etext ();
/* These functions are defined in gmon/gmon.c;
they do all the work of setting up and cleaning up profiling. */
extern void monstartup (u_long, u_long);
extern void _mcleanup (void);
/* This function gets called at startup by the normal constructor
mechanism. We link this file together with start.o to produce gcrt1.o,
so this constructor will be first in the list. */
static void gmon_start (void) __attribute__ ((constructor));
static void
gmon_start (void)
{
/* Start keeping profiling records. */
monstartup ((u_long) &_start, (u_long) &etext);
/* Call _mcleanup before exitting; it will write out gmon.out from the
collected data. */
atexit (&_mcleanup);
}

28
gmon/Makefile Normal file
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@ -0,0 +1,28 @@
# Copyright (C) 1995 Free Software Foundation, Inc.
# This file is part of the GNU C Library.
# The GNU C Library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Library General Public License as
# published by the Free Software Foundation; either version 2 of the
# License, or (at your option) any later version.
# The GNU C Library 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 GNU
# Library General Public License for more details.
# You should have received a copy of the GNU Library General Public
# License along with the GNU C Library; see the file COPYING.LIB. If
# not, write to the Free Software Foundation, Inc., 675 Mass Ave,
# Cambridge, MA 02139, USA.
#
# Sub-makefile for gmon portion of the library.
#
subdir := gmon
headers := sys/gmon.h machine-gmon.h
routines := gmon mcount profil
include ../Rules

232
gmon/gmon.c Normal file
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@ -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);
}

178
gmon/mcount.c Normal file
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@ -0,0 +1,178 @@
/*-
* 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(KERNEL) && defined(LIBC_SCCS)
static char sccsid[] = "@(#)mcount.c 8.1 (Berkeley) 6/4/93";
#endif
#include <sys/param.h>
#include <sys/gmon.h>
/*
* mcount is called on entry to each function compiled with the profiling
* switch set. _mcount(), which is declared in a machine-dependent way
* with _MCOUNT_DECL, does the actual work and is either inlined into a
* C routine or called by an assembly stub. In any case, this magic is
* taken care of by the MCOUNT definition in <machine/profile.h>.
*
* _mcount updates data structures that represent traversals of the
* program's call graph edges. frompc and selfpc are the return
* address and function address that represents the given call graph edge.
*
* Note: the original BSD code used the same variable (frompcindex) for
* both frompcindex and frompc. Any reasonable, modern compiler will
* perform this optimization.
*/
_MCOUNT_DECL(frompc, selfpc) /* _mcount; may be static, inline, etc */
register u_long frompc, selfpc;
{
register u_short *frompcindex;
register struct tostruct *top, *prevtop;
register struct gmonparam *p;
register long toindex;
#ifdef KERNEL
register int s;
#endif
p = &_gmonparam;
/*
* check that we are profiling
* and that we aren't recursively invoked.
*/
if (p->state != GMON_PROF_ON)
return;
#ifdef KERNEL
MCOUNT_ENTER;
#else
p->state = GMON_PROF_BUSY;
#endif
/*
* check that frompcindex is a reasonable pc value.
* for example: signal catchers get called from the stack,
* not from text space. too bad.
*/
frompc -= p->lowpc;
if (frompc > p->textsize)
goto done;
frompcindex = &p->froms[frompc / (p->hashfraction * sizeof(*p->froms))];
toindex = *frompcindex;
if (toindex == 0) {
/*
* first time traversing this arc
*/
toindex = ++p->tos[0].link;
if (toindex >= p->tolimit)
/* halt further profiling */
goto overflow;
*frompcindex = toindex;
top = &p->tos[toindex];
top->selfpc = selfpc;
top->count = 1;
top->link = 0;
goto done;
}
top = &p->tos[toindex];
if (top->selfpc == selfpc) {
/*
* arc at front of chain; usual case.
*/
top->count++;
goto done;
}
/*
* have to go looking down chain for it.
* top points to what we are looking at,
* prevtop points to previous top.
* we know it is not at the head of the chain.
*/
for (; /* goto done */; ) {
if (top->link == 0) {
/*
* top is end of the chain and none of the chain
* had top->selfpc == selfpc.
* so we allocate a new tostruct
* and link it to the head of the chain.
*/
toindex = ++p->tos[0].link;
if (toindex >= p->tolimit)
goto overflow;
top = &p->tos[toindex];
top->selfpc = selfpc;
top->count = 1;
top->link = *frompcindex;
*frompcindex = toindex;
goto done;
}
/*
* otherwise, check the next arc on the chain.
*/
prevtop = top;
top = &p->tos[top->link];
if (top->selfpc == selfpc) {
/*
* there it is.
* increment its count
* move it to the head of the chain.
*/
top->count++;
toindex = prevtop->link;
prevtop->link = top->link;
top->link = *frompcindex;
*frompcindex = toindex;
goto done;
}
}
done:
#ifdef KERNEL
MCOUNT_EXIT;
#else
p->state = GMON_PROF_ON;
#endif
return;
overflow:
p->state = GMON_PROF_ERROR;
#ifdef KERNEL
MCOUNT_EXIT;
#endif
return;
}
/*
* Actual definition of mcount function. Defined in <machine/profile.h>,
* which is included by <sys/gmon.h>.
*/
MCOUNT

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gmon/sys/gmon.h Normal file
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@ -0,0 +1,159 @@
/*-
* Copyright (c) 1982, 1986, 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.
*
* @(#)gmon.h 8.2 (Berkeley) 1/4/94
*/
#ifndef _SYS_GMON_H_
#define _SYS_GMON_H_
#include <machine-gmon.h>
/*
* Structure prepended to gmon.out profiling data file.
*/
struct gmonhdr {
u_long lpc; /* base pc address of sample buffer */
u_long hpc; /* max pc address of sampled buffer */
int ncnt; /* size of sample buffer (plus this header) */
int version; /* version number */
int profrate; /* profiling clock rate */
int spare[3]; /* reserved */
};
#define GMONVERSION 0x00051879
/*
* histogram counters are unsigned shorts (according to the kernel).
*/
#define HISTCOUNTER unsigned short
/*
* fraction of text space to allocate for histogram counters here, 1/2
*/
#define HISTFRACTION 2
/*
* Fraction of text space to allocate for from hash buckets.
* The value of HASHFRACTION is based on the minimum number of bytes
* of separation between two subroutine call points in the object code.
* Given MIN_SUBR_SEPARATION bytes of separation the value of
* HASHFRACTION is calculated as:
*
* HASHFRACTION = MIN_SUBR_SEPARATION / (2 * sizeof(short) - 1);
*
* For example, on the VAX, the shortest two call sequence is:
*
* calls $0,(r0)
* calls $0,(r0)
*
* which is separated by only three bytes, thus HASHFRACTION is
* calculated as:
*
* HASHFRACTION = 3 / (2 * 2 - 1) = 1
*
* Note that the division above rounds down, thus if MIN_SUBR_FRACTION
* is less than three, this algorithm will not work!
*
* In practice, however, call instructions are rarely at a minimal
* distance. Hence, we will define HASHFRACTION to be 2 across all
* architectures. This saves a reasonable amount of space for
* profiling data structures without (in practice) sacrificing
* any granularity.
*/
#define HASHFRACTION 2
/*
* percent of text space to allocate for tostructs with a minimum.
*/
#define ARCDENSITY 2
#define MINARCS 50
#define MAXARCS ((1 << (8 * sizeof(HISTCOUNTER))) - 2)
struct tostruct {
u_long selfpc;
long count;
u_short link;
u_short pad;
};
/*
* a raw arc, with pointers to the calling site and
* the called site and a count.
*/
struct rawarc {
u_long raw_frompc;
u_long raw_selfpc;
long raw_count;
};
/*
* general rounding functions.
*/
#define ROUNDDOWN(x,y) (((x)/(y))*(y))
#define ROUNDUP(x,y) ((((x)+(y)-1)/(y))*(y))
/*
* The profiling data structures are housed in this structure.
*/
struct gmonparam {
int state;
u_short *kcount;
u_long kcountsize;
u_short *froms;
u_long fromssize;
struct tostruct *tos;
u_long tossize;
long tolimit;
u_long lowpc;
u_long highpc;
u_long textsize;
u_long hashfraction;
};
extern struct gmonparam _gmonparam;
/*
* Possible states of profiling.
*/
#define GMON_PROF_ON 0
#define GMON_PROF_BUSY 1
#define GMON_PROF_ERROR 2
#define GMON_PROF_OFF 3
/*
* Sysctl definitions for extracting profiling information from the kernel.
*/
#define GPROF_STATE 0 /* int: profiling enabling variable */
#define GPROF_COUNT 1 /* struct: profile tick count buffer */
#define GPROF_FROMS 2 /* struct: from location hash bucket */
#define GPROF_TOS 3 /* struct: destination/count structure */
#define GPROF_GMONPARAM 4 /* struct: profiling parameters (see above) */
#endif /* !_SYS_GMON_H_ */

1
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#include <gmon/sys/gmon.h>

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sysdeps/i386/machine-gmon.h Normal file
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/* Machine-specific calling sequence for `mcount' profiling function. i386
Copyright (C) 1995 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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 GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#define _MCOUNT_DECL static inline void _mcount
/* Call _mcount with our the return PC for our caller,
and the return PC our caller will return to. */
#define MCOUNT \
void mcount (u_long arg) \
{ \
_mcount (((u_long *) (&arg)[-2])[-1], \
(&arg)[-1]); \
}

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/* Low-level statistical profiling support function. Mach/Hurd version.
Copyright (C) 1995 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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 GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <sys/types.h>
#include <unistd.h>
#include <errno.h>
#include <hurd.h>
#include <mach/mach4.h>
#include <mach/pc_sample.h>
#include <cthreads.h>
#include <assert.h>
static thread_t profile_thread = MACH_PORT_NULL;
static u_short *samples;
static size_t maxsamples;
static size_t pc_offset;
static size_t sample_scale;
static sampled_pc_seqno_t seqno;
static struct mutex lock = MUTEX_INITIALIZER;
/* Enable statistical profiling, writing samples of the PC into at most
SIZE bytes of SAMPLE_BUFFER; every processor clock tick while profiling
is enabled, the system examines the user PC and increments
SAMPLE_BUFFER[((PC - OFFSET) / 2) * SCALE / 65536]. If SCALE is zero,
disable profiling. Returns zero on success, -1 on error. */
static error_t
update_waiter (u_short *sample_buffer, size_t size, size_t offset, u_int scale)
{
error_t err;
if (profile_thread == MACH_PORT_NULL)
{
/* Set up the profiling collector thread. */
static void profile_waiter (void);
err = __thread_create (__mach_task_self (), &profile_thread);
if (! err)
err = __mach_setup_thread (__mach_task_self (), profile_thread,
&profile_waiter, NULL, NULL);
}
else
err = 0;
if (! err)
{
if (sample_scale == 0)
err = __thread_resume (profile_thread);
if (! err)
{
samples = sample_buffer;
maxsamples = size / sizeof *sample_buffer;
pc_offset = offset;
sample_scale = scale;
}
}
return err;
}
int
profil (u_short *sample_buffer, size_t size, size_t offset, u_int scale)
{
error_t err;
__mutex_lock (&lock);
if (scale == 0)
{
/* Disable profiling. */
int count;
__thread_suspend (profile_thread);
err = __task_disable_pc_sampling (__mach_task_self (), &count);
sample_scale = 0;
seqno = 0;
}
else
err = update_waiter (sample_buffer, size, offset, scale);
__mutex_unlock (&lock);
return err ? __hurd_fail (err) : 0;
}
static void
profile_waiter (void)
{
sampled_pc_t pc_samples[512];
mach_msg_type_number_t nsamples = 512, i;
mach_port_t rcv = __mach_reply_port ();
mach_msg_header_t msg;
const mach_msg_timeout_t timeout = 17; /* ??? XXX */
error_t err;
while (1)
{
__mutex_lock (&lock);
err = __task_get_sampled_pcs (__mach_task_self (), &seqno,
pc_samples, &nsamples);
assert_perror (err);
for (i = 0; i < nsamples; ++i)
{
size_t idx = (((pc_samples[i].pc - pc_offset) / 2) *
sample_scale / 65536);
if (idx < maxsamples)
++samples[idx];
}
__vm_deallocate (__mach_task_self (),
(vm_address_t) pc_samples,
nsamples * sizeof *pc_samples);
__mutex_unlock (&lock);
__mach_msg (&msg, MACH_RCV_MSG|MACH_RCV_TIMEOUT, 0, sizeof msg,
rcv, timeout, MACH_PORT_NULL);
}
}
data_set_element (_hurd_fork_locks, lock);
static void
fork_profil (void)
{
u_short *sb;
size_t n, o, ss;
error_t err;
if (profile_thread != MACH_PORT_NULL)
{
__mach_port_deallocate (__mach_task_self (), profile_thread);
profile_thread = MACH_PORT_NULL;
}
sb = samples;
samples = NULL;
n = maxsamples;
maxsamples = 0;
o = pc_offset;
pc_offset = 0;
ss = sample_scale;
sample_scale = 0;
err = update_waiter (sb, n * sizeof *sb, o, ss);
assert_perror (err);
}
text_set_element (_hurd_fork_child_hook, fork_profil);

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sysdeps/stub/machine-gmon.h Normal file
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/* Machine-specific calling sequence for `mcount' profiling function. Stub
Copyright (C) 1995 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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 GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#define _MCOUNT_DECL static inline void _mcount
/* Call _mcount with our the return PC for our caller,
and the return PC our caller will return to. */
#define MCOUNT \
void mcount (u_long arg) \
{ \
_mcount (caller return PC, my return PC); \
}

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sysdeps/stub/profil.c Normal file
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/* Low-level statistical profiling support function. Stub version.
Copyright (C) 1995 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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 GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <sys/types.h>
#include <unistd.h>
#include <errno.h>
/* Enable statistical profiling, writing samples of the PC into at most
SIZE bytes of SAMPLE_BUFFER; every processor clock tick while profiling
is enabled, the system examines the user PC and increments
SAMPLE_BUFFER[((PC - OFFSET) / 2) * SCALE / 65536]. If SCALE is zero,
disable profiling. Returns zero on success, -1 on error. */
int
profil (u_short *sample_buffer, size_t size, size_t offset, u_int scale)
{
if (scale == 0)
/* Disable profiling. */
return 0;
errno = ENOSYS;
return -1;
}
stub_warning (profil)

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sysdeps/unix/bsd/profil.S Normal file
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/* Low-level statistical profiling support function. Unix syscall version.
Copyright (C) 1995 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library 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 GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
#include <sysdep.h>
SYSCALL (profil, 4)
ret