#ifndef lint
static char sccsid[] = "@(#)gmon.c 5.3 (Berkeley) 5/22/91";
#endif
#if 0
#include <unistd.h>
#endif
#ifdef DEBUG
#include <stdio.h>
#endif
#include "gmon.h"
extern mcount() asm ("mcount");
extern char *minbrk asm ("minbrk");
#ifdef __alpha
extern char *sbrk ();
#endif
static int profiling = 3;
static unsigned short *froms;
static struct tostruct *tos = 0;
static long tolimit = 0;
static char *s_lowpc = 0;
static char *s_highpc = 0;
static unsigned long s_textsize = 0;
static int ssiz;
static char *sbuf;
static int s_scale;
#define SCALE_1_TO_1 0x10000L
#define MSG "No space for profiling buffer(s)\n"
monstartup(lowpc, highpc)
char *lowpc;
char *highpc;
{
int monsize;
char *buffer;
int o;
lowpc = (char *)
ROUNDDOWN((unsigned) lowpc, HISTFRACTION*sizeof(HISTCOUNTER));
s_lowpc = lowpc;
highpc = (char *)
ROUNDUP((unsigned) highpc, HISTFRACTION*sizeof(HISTCOUNTER));
s_highpc = highpc;
s_textsize = highpc - lowpc;
monsize = (s_textsize / HISTFRACTION) + sizeof(struct phdr);
buffer = sbrk( monsize );
if ( buffer == (char *) -1 ) {
write( 2 , MSG , sizeof(MSG) );
return;
}
froms = (unsigned short *) sbrk( s_textsize / HASHFRACTION );
if ( froms == (unsigned short *) -1 ) {
write( 2 , MSG , sizeof(MSG) );
froms = 0;
return;
}
tolimit = s_textsize * ARCDENSITY / 100;
if ( tolimit < MINARCS ) {
tolimit = MINARCS;
} else if ( tolimit > 65534 ) {
tolimit = 65534;
}
tos = (struct tostruct *) sbrk( tolimit * sizeof( struct tostruct ) );
if ( tos == (struct tostruct *) -1 ) {
write( 2 , MSG , sizeof(MSG) );
froms = 0;
tos = 0;
return;
}
minbrk = sbrk(0);
tos[0].link = 0;
sbuf = buffer;
ssiz = monsize;
( (struct phdr *) buffer ) -> lpc = lowpc;
( (struct phdr *) buffer ) -> hpc = highpc;
( (struct phdr *) buffer ) -> ncnt = ssiz;
monsize -= sizeof(struct phdr);
if ( monsize <= 0 )
return;
o = highpc - lowpc;
if( monsize < o )
#ifndef hp300
s_scale = ( (float) monsize / o ) * SCALE_1_TO_1;
#else
{
int quot = o / monsize;
if (quot >= 0x10000)
s_scale = 1;
else if (quot >= 0x100)
s_scale = 0x10000 / quot;
else if (o >= 0x800000)
s_scale = 0x1000000 / (o / (monsize >> 8));
else
s_scale = 0x1000000 / ((o << 8) / monsize);
}
#endif
else
s_scale = SCALE_1_TO_1;
moncontrol(1);
}
_mcleanup()
{
int fd;
int fromindex;
int endfrom;
char *frompc;
int toindex;
struct rawarc rawarc;
moncontrol(0);
fd = creat( "gmon.out" , 0666 );
if ( fd < 0 ) {
perror( "mcount: gmon.out" );
return;
}
# ifdef DEBUG
fprintf( stderr , "[mcleanup] sbuf 0x%x ssiz %d\n" , sbuf , ssiz );
# endif DEBUG
write( fd , sbuf , ssiz );
endfrom = s_textsize / (HASHFRACTION * sizeof(*froms));
for ( fromindex = 0 ; fromindex < endfrom ; fromindex++ ) {
if ( froms[fromindex] == 0 ) {
continue;
}
frompc = s_lowpc + (fromindex * HASHFRACTION * sizeof(*froms));
for (toindex=froms[fromindex]; toindex!=0; toindex=tos[toindex].link) {
# ifdef DEBUG
fprintf( stderr ,
"[mcleanup] frompc 0x%x selfpc 0x%x count %d\n" ,
frompc , tos[toindex].selfpc , tos[toindex].count );
# endif DEBUG
rawarc.raw_frompc = (unsigned long) frompc;
rawarc.raw_selfpc = (unsigned long) tos[toindex].selfpc;
rawarc.raw_count = tos[toindex].count;
write( fd , &rawarc , sizeof rawarc );
}
}
close( fd );
}
mcount()
{
register char *selfpc;
register unsigned short *frompcindex;
register struct tostruct *top;
register struct tostruct *prevtop;
register long toindex;
selfpc = (void *) __builtin_return_address (0);
frompcindex = (void *) __builtin_return_address (1);
if (profiling) {
goto out;
}
profiling++;
frompcindex = (unsigned short *) ((long) frompcindex - (long) s_lowpc);
if ((unsigned long) frompcindex > s_textsize) {
goto done;
}
frompcindex =
&froms[((long) frompcindex) / (HASHFRACTION * sizeof(*froms))];
toindex = *frompcindex;
if (toindex == 0) {
toindex = ++tos[0].link;
if (toindex >= tolimit) {
goto overflow;
}
*frompcindex = toindex;
top = &tos[toindex];
top->selfpc = selfpc;
top->count = 1;
top->link = 0;
goto done;
}
top = &tos[toindex];
if (top->selfpc == selfpc) {
top->count++;
goto done;
}
for (; ; ) {
if (top->link == 0) {
toindex = ++tos[0].link;
if (toindex >= tolimit) {
goto overflow;
}
top = &tos[toindex];
top->selfpc = selfpc;
top->count = 1;
top->link = *frompcindex;
*frompcindex = toindex;
goto done;
}
prevtop = top;
top = &tos[top->link];
if (top->selfpc == selfpc) {
top->count++;
toindex = prevtop->link;
prevtop->link = top->link;
top->link = *frompcindex;
*frompcindex = toindex;
goto done;
}
}
done:
profiling--;
out:
return;
overflow:
profiling++;
# define TOLIMIT "mcount: tos overflow\n"
write(2, TOLIMIT, sizeof(TOLIMIT));
goto out;
}
moncontrol(mode)
int mode;
{
if (mode) {
profil(sbuf + sizeof(struct phdr), ssiz - sizeof(struct phdr),
(int)s_lowpc, s_scale);
profiling = 0;
} else {
profil((char *) 0, 0, 0, 0);
profiling = 3;
}
}