/*-
* 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.
* 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.
*/
/*
* This file is taken from Cygwin distribution. Please keep it in sync.
* The differences should be within __MINGW32__ guard.
*/
#include <fcntl.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <stdint.h>
#include "gmon.h"
#include "profil.h"
#include <string.h>
#define bzero(ptr,size) memset (ptr, 0, size);
#define ERR(s) write(2, s, sizeof(s))
struct gmonparam _gmonparam = { GMON_PROF_OFF, NULL, 0, NULL, 0, NULL, 0, 0L, 0, 0, 0};
static char already_setup = 0; /* flag to indicate if we need to init */
static int s_scale;
/* see profil(2) where this is described (incorrectly) */
#define SCALE_1_TO_1 0x10000L
static void moncontrol(int mode);
void monstartup (size_t lowpc, size_t highpc) {
register size_t o;
char *cp;
struct gmonparam *p = &_gmonparam;
if (already_setup) {
/* zero out cp as value will be added there */
bzero(p->tos, p->kcountsize + p->fromssize + p->tossize);
moncontrol(1); /* start */
return;
}
already_setup = 1;
/* enable semihosting, for eventual output */
extern void initialise_monitor_handles(void);
initialise_monitor_handles();
/*
* 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 + 0x20;
p->kcountsize = p->textsize / HISTFRACTION;
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);
extern void *hal_allocate_static_memory(const size_t size);
cp = hal_allocate_static_memory(p->kcountsize + p->fromssize + p->tossize);
if (cp == NULL) {
ERR("monstartup: out of memory\n");
return;
}
/* zero out cp as value will be added there */
bzero(cp, p->kcountsize + p->fromssize + p->tossize);
p->tos = (struct tostruct *)cp;
cp += p->tossize;
p->kcount = (unsigned short *)cp;
cp += p->kcountsize;
p->froms = (unsigned short *)cp;
p->tos[0].link = 0;
o = p->highpc - p->lowpc;
if (p->kcountsize < o) {
#ifndef notdef
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); /* start */
}
void _mcleanup(void) {
static const char gmon_out[] = "gmon.out";
int fd;
int fromindex;
int endfrom;
size_t frompc;
int toindex;
struct rawarc rawarc;
struct gmonparam *p = &_gmonparam;
struct gmonhdr gmonhdr = {0}, *hdr;
const char *proffile;
#ifdef DEBUG
int log, len;
char dbuf[200];
#endif
if (p->state == GMON_PROF_ERROR) {
ERR("_mcleanup: tos overflow\n");
}
moncontrol(0); /* stop */
proffile = gmon_out;
fd = open(proffile , O_CREAT|O_TRUNC|O_WRONLY|O_BINARY, 0666);
if (fd < 0) {
perror( proffile );
return;
}
#ifdef DEBUG
log = open("gmon.log", O_CREAT|O_TRUNC|O_WRONLY, 0664);
if (log < 0) {
perror("mcount: gmon.log");
return;
}
len = sprintf(dbuf, "[mcleanup1] kcount 0x%x ssiz %d\n",
(unsigned int)p->kcount, p->kcountsize);
write(log, dbuf, 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 = PROF_HZ;
hdr->spare[0] = hdr->spare[1] = hdr->spare[2] = 0;
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 * HASHFRACTION * sizeof(*p->froms);
for (toindex = p->froms[fromindex]; toindex != 0; toindex = p->tos[toindex].link) {
#ifdef DEBUG
len = sprintf(dbuf,
"[mcleanup2] frompc 0x%x selfpc 0x%x count %ld\n" ,
frompc, p->tos[toindex].selfpc,
p->tos[toindex].count);
write(log, dbuf, 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.
*/
static void moncontrol(int mode) {
struct gmonparam *p = &_gmonparam;
if (mode) {
/* start */
profil((char *)p->kcount, p->kcountsize, p->lowpc, s_scale);
p->state = GMON_PROF_ON;
} else {
/* stop */
profil((char *)0, 0, 0, 0);
p->state = GMON_PROF_OFF;
}
}
void _mcount_internal(uint32_t *frompcindex, uint32_t *selfpc) {
register struct tostruct *top;
register struct tostruct *prevtop;
register long toindex;
struct gmonparam *p = &_gmonparam;
/*
* check that we are profiling
* and that we aren't recursively invoked.
*/
if (p->state!=GMON_PROF_ON) {
goto out;
}
p->state++;
/*
* check that frompcindex is a reasonable pc value.
* for example: signal catchers get called from the stack,
* not from text space. too bad.
*/
frompcindex = (uint32_t*)((long)frompcindex - (long)p->lowpc);
if ((unsigned long)frompcindex > p->textsize) {
goto done;
}
frompcindex = (uint32_t*)&p->froms[((long)frompcindex) / (HASHFRACTION * sizeof(*p->froms))];
toindex = *((unsigned short*)frompcindex); /* get froms[] value */
if (toindex == 0) {
/*
* first time traversing this arc
*/
toindex = ++p->tos[0].link; /* the link of tos[0] points to the last used record in the array */
if (toindex >= p->tolimit) { /* more tos[] entries than we can handle! */
goto overflow;
}
*((unsigned short*)frompcindex) = (unsigned short)toindex; /* store new 'to' value into froms[] */
top = &p->tos[toindex];
top->selfpc = (size_t)selfpc;
top->count = 1;
top->link = 0;
goto done;
}
top = &p->tos[toindex];
if (top->selfpc == (size_t)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 = (size_t)selfpc;
top->count = 1;
top->link = *((unsigned short*)frompcindex);
*(unsigned short*)frompcindex = (unsigned short)toindex;
goto done;
}
/*
* otherwise, check the next arc on the chain.
*/
prevtop = top;
top = &p->tos[top->link];
if (top->selfpc == (size_t)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 = *((unsigned short*)frompcindex);
*((unsigned short*)frompcindex) = (unsigned short)toindex;
goto done;
}
}
done:
p->state--;
/* and fall through */
out:
return; /* normal return restores saved registers */
overflow:
p->state++; /* halt further profiling */
#define TOLIMIT "mcount: tos overflow\n"
write (2, TOLIMIT, sizeof(TOLIMIT));
goto out;
}
void _monInit(void) {
_gmonparam.state = GMON_PROF_OFF;
already_setup = 0;
}
