ref: fc77a2d3d384c1ee854deebd4f1a97e751d7eaa2
dir: /sys/src/cmd/prof.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
#include <mach.h>
typedef struct Data Data;
typedef struct Pc Pc;
typedef struct Acc Acc;
struct Data
{
ushort down;
ushort right;
ulong pc;
ulong count;
ulong time;
};
struct Pc
{
Pc *next;
ulong pc;
};
struct Acc
{
char *name;
ulong pc;
ulong ms;
ulong calls;
};
Data* data;
Acc* acc;
ulong ms;
long nsym;
long ndata;
int dflag;
int rflag;
Biobuf bout;
int tabstop = 4;
int verbose;
void syms(char*);
void datas(char*);
void graph(int, ulong, Pc*);
void plot(void);
char* name(ulong);
void indent(int);
char* defaout(void);
void
main(int argc, char *argv[])
{
char *s;
s = getenv("tabstop");
if(s!=nil && strtol(s,0,0)>0)
tabstop = strtol(s,0,0);
ARGBEGIN{
case 'v':
verbose = 1;
break;
case 'd':
dflag = 1;
break;
case 'r':
rflag = 1;
break;
default:
fprint(2, "usage: prof [-dr] [8.out] [prof.out]\n");
exits("usage");
}ARGEND
Binit(&bout, 1, OWRITE);
if(argc > 0)
syms(argv[0]);
else
syms(defaout());
if(argc > 1)
datas(argv[1]);
else
datas("prof.out");
if(ndata){
if(dflag)
graph(0, data[0].down, 0);
else
plot();
}
exits(0);
}
void
swapdata(Data *dp)
{
dp->down = beswab(dp->down);
dp->right = beswab(dp->right);
dp->pc = beswal(dp->pc);
dp->count = beswal(dp->count);
dp->time = beswal(dp->time);
}
int
acmp(void *va, void *vb)
{
Acc *a, *b;
ulong ua, ub;
a = va;
b = vb;
ua = a->ms;
ub = b->ms;
if(ua > ub)
return 1;
if(ua < ub)
return -1;
return 0;
}
void
syms(char *cout)
{
Fhdr f;
int fd;
if((fd = open(cout, 0)) < 0){
perror(cout);
exits("open");
}
if (!crackhdr(fd, &f)) {
fprint(2, "can't read text file header\n");
exits("read");
}
if (f.type == FNONE) {
fprint(2, "text file not an a.out\n");
exits("file type");
}
if (syminit(fd, &f) < 0) {
fprint(2, "syminit: %r\n");
exits("syms");
}
close(fd);
}
void
datas(char *dout)
{
int fd;
Dir *d;
int i;
if((fd = open(dout, 0)) < 0){
perror(dout);
exits("open");
}
d = dirfstat(fd);
if(d == nil){
perror(dout);
exits("stat");
}
ndata = d->length/sizeof(data[0]);
data = malloc(ndata*sizeof(Data));
if(data == 0){
fprint(2, "prof: can't malloc data\n");
exits("data malloc");
}
if(read(fd, data, d->length) != d->length){
fprint(2, "prof: can't read data file\n");
exits("data read");
}
free(d);
close(fd);
for (i = 0; i < ndata; i++)
swapdata(data+i);
}
char*
name(ulong pc)
{
Symbol s;
static char buf[16];
if (findsym(pc, CTEXT, &s))
return(s.name);
snprint(buf, sizeof(buf), "#%lux", pc);
return buf;
}
void
graph(int ind, ulong i, Pc *pc)
{
long time, count, prgm;
Pc lpc;
if(i >= ndata){
fprint(2, "prof: index out of range %ld [max %ld]\n", i, ndata);
return;
}
count = data[i].count;
time = data[i].time;
prgm = data[i].pc;
if(time < 0)
time += data[0].time;
if(data[i].right != 0xFFFF)
graph(ind, data[i].right, pc);
indent(ind);
if(count == 1)
Bprint(&bout, "%s:%lud\n", name(prgm), time);
else
Bprint(&bout, "%s:%lud/%lud\n", name(prgm), time, count);
if(data[i].down == 0xFFFF)
return;
lpc.next = pc;
lpc.pc = prgm;
if(!rflag){
while(pc){
if(pc->pc == prgm){
indent(ind+1);
Bprint(&bout, "...\n");
return;
}
pc = pc->next;
}
}
graph(ind+1, data[i].down, &lpc);
}
/*
* assume acc is ordered by increasing text address.
*/
long
symind(ulong pc)
{
int top, bot, mid;
bot = 0;
top = nsym;
for (mid = (bot+top)/2; mid < top; mid = (bot+top)/2) {
if (pc < acc[mid].pc)
top = mid;
else
if (mid != nsym-1 && pc >= acc[mid+1].pc)
bot = mid;
else
return mid;
}
return -1;
}
ulong
sum(ulong i)
{
long j, dtime, time;
int k;
static indent;
if(i >= ndata){
fprint(2, "prof: index out of range %ld [max %ld]\n", i, ndata);
return 0;
}
j = symind(data[i].pc);
time = data[i].time;
if(time < 0)
time += data[0].time;
if (verbose){
for(k = 0; k < indent; k++)
print(" ");
print("%lud: %ld/%lud", i, data[i].time, data[i].count);
if (j >= 0)
print(" %s\n", acc[j].name);
else
print(" 0x%lux\n", data[i].pc);
}
dtime = 0;
if(data[i].down != 0xFFFF){
indent++;
dtime = sum(data[i].down);
indent--;
}
j = symind(data[i].pc);
if (j >= 0) {
acc[j].ms += time - dtime;
ms += time - dtime;
acc[j].calls += data[i].count;
}
if(data[i].right == 0xFFFF)
return time;
return time + sum(data[i].right);
}
void
plot(void)
{
Symbol s;
for (nsym = 0; textsym(&s, nsym); nsym++) {
acc = realloc(acc, (nsym+1)*sizeof(Acc));
if(acc == 0){
fprint(2, "prof: malloc fail\n");
exits("acc malloc");
}
acc[nsym].name = s.name;
acc[nsym].pc = s.value;
acc[nsym].calls = acc[nsym].ms = 0;
}
sum(data[0].down);
qsort(acc, nsym, sizeof(Acc), acmp);
Bprint(&bout, " %% Time Calls Name\n");
if(ms == 0)
ms = 1;
while (--nsym >= 0) {
if(acc[nsym].calls)
Bprint(&bout, "%4.1f %8.3f %8lud\t%s\n",
(100.0*acc[nsym].ms)/ms,
acc[nsym].ms/1000.0,
acc[nsym].calls,
acc[nsym].name);
}
}
void
indent(int ind)
{
int j;
j = 2*ind;
while(j >= tabstop){
Bwrite(&bout, ".\t", 2);
j -= tabstop;
}
if(j)
Bwrite(&bout, ". ", j);
}
char* trans[] =
{
"386", "8.out",
"68020", "2.out",
"alpha", "7.out",
"amd64", "6.out",
"arm", "5.out",
"mips", "v.out",
"power", "q.out",
"sparc", "k.out",
"spim", "0.out",
0,0
};
char*
defaout(void)
{
char *p;
int i;
p = getenv("objtype");
if(p)
for(i=0; trans[i]; i+=2)
if(strcmp(p, trans[i]) == 0)
return trans[i+1];
return trans[1];
}