Show profio.c syntax highlighted
/* C compiler: prof.out input
prof.out format:
#files
name
... (#files-1 times)
#functions
name file# x y count caller file x y
... (#functions-1 times)
#points
file# x y count
... (#points-1 times)
*/
#include "c.h"
struct count { /* count data: */
int x, y; /* source coordinate */
int count; /* associated execution count */
};
#define MAXTOKEN 64
struct file { /* per-file prof.out data: */
struct file *link; /* link to next file */
char *name; /* file name */
int size; /* size of counts[] */
int count; /* counts[0..count-1] hold valid data */
struct count *counts; /* count data */
struct func { /* function data: */
struct func *link; /* link to next function */
char *name; /* function name */
struct count count; /* total number of calls */
struct caller { /* caller data: */
struct caller *link; /* link to next caller */
char *name; /* caller's name */
char *file; /* call site: file, x, y */
int x, y;
int count; /* number of calls from this site */
} *callers;
} *funcs; /* list of functions */
} *filelist;
FILE *fp;
/* acaller - add caller and site (file,x,y) to callee's callers list */
static void acaller(char *caller, char *file, int x, int y, int count, struct func *callee) {
struct caller *q;
assert(callee);
for (q = callee->callers; q && (caller != q->name
|| file != q->file || x != q->x || y != q->y); q = q->link)
;
if (!q) {
struct caller **r;
NEW(q, PERM);
q->name = caller;
q->file = file;
q->x = x;
q->y = y;
q->count = 0;
for (r = &callee->callers; *r && (strcmp(q->name, (*r)->name) > 0
|| strcmp(q->file, (*r)->file) > 0 || q->y > (*r)->y || q->y > (*r)->y); r = &(*r)->link)
;
q->link = *r;
*r = q;
}
q->count += count;
}
/* compare - return <0, 0, >0 if a<b, a==b, a>b, resp. */
static int compare(struct count *a, struct count *b) {
if (a->y == b->y)
return a->x - b->x;
return a->y - b->y;
}
/* findfile - return file name's file list entry, or 0 */
static struct file *findfile(char *name) {
struct file *p;
for (p = filelist; p; p = p->link)
if (p->name == name)
return p;
return 0;
}
/* afunction - add function name and its data to file's function list */
static struct func *afunction(char *name, char *file, int x, int y, int count) {
struct file *p = findfile(file);
struct func *q;
assert(p);
for (q = p->funcs; q && name != q->name; q = q->link)
;
if (!q) {
struct func **r;
NEW(q, PERM);
q->name = name;
q->count.x = x;
q->count.y = y;
q->count.count = 0;
q->callers = 0;
for (r = &p->funcs; *r && compare(&q->count, &(*r)->count) > 0; r = &(*r)->link)
;
q->link = *r;
*r = q;
}
q->count.count += count;
return q;
}
/* apoint - append execution point i to file's data */
static void apoint(int i, char *file, int x, int y, int count) {
struct file *p = findfile(file);
assert(p);
if (i >= p->size) {
int j;
if (p->size == 0) {
p->size = i >= 200 ? 2*i : 200;
p->counts = newarray(p->size, sizeof *p->counts, PERM);
} else {
struct count *new;
p->size = 2*i;
new = newarray(p->size, sizeof *new, PERM);
for (j = 0; j < p->count; j++)
new[j] = p->counts[j];
p->counts = new;
}
for (j = p->count; j < p->size; j++) {
static struct count z;
p->counts[j] = z;
}
}
p->counts[i].x = x;
p->counts[i].y = y;
p->counts[i].count += count;
if (i >= p->count)
p->count = i + 1;
}
/* findcount - return count associated with (file,x,y) or -1 */
int findcount(char *file, int x, int y) {
static struct file *cursor;
if (cursor == 0 || cursor->name != file)
cursor = findfile(file);
if (cursor) {
int l, u;
struct count *c = cursor->counts;
for (l = 0, u = cursor->count - 1; l <= u; ) {
int k = (l + u)/2;
if (c[k].y > y || c[k].y == y && c[k].x > x)
u = k - 1;
else if (c[k].y < y || c[k].y == y && c[k].x < x)
l = k + 1;
else
return c[k].count;
}
}
return -1;
}
/* findfunc - return count associated with function name in file or -1 */
int findfunc(char *name, char *file) {
static struct file *cursor;
if (cursor == 0 || cursor->name != file)
cursor = findfile(file);
if (cursor) {
struct func *p;
for (p = cursor->funcs; p; p = p->link)
if (p->name == name)
return p->count.count;
}
return -1;
}
/* getd - read a nonnegative number */
static int getd(void) {
int c, n = 0;
while ((c = getc(fp)) != EOF && (c == ' ' || c == '\n' || c == '\t'))
;
if (c >= '0' && c <= '9') {
do
n = 10*n + (c - '0');
while ((c = getc(fp)) >= '0' && c <= '9');
return n;
}
return -1;
}
/* getstr - read a string */
static char *getstr(void) {
int c;
char buf[MAXTOKEN], *s = buf;
while ((c = getc(fp)) != EOF && c != ' ' && c != '\n' && c != '\t')
if (s - buf < (int)sizeof buf - 2)
*s++ = c;
*s = 0;
return s == buf ? (char *)0 : string(buf);
}
/* gather - read prof.out data from fd */
static int gather(void) {
int i, nfiles, nfuncs, npoints;
char *files[64];
if ((nfiles = getd()) < 0)
return 0;
assert(nfiles < NELEMS(files));
for (i = 0; i < nfiles; i++) {
if ((files[i] = getstr()) == 0)
return -1;
if (!findfile(files[i])) {
struct file *new;
NEW(new, PERM);
new->name = files[i];
new->size = new->count = 0;
new->counts = 0;
new->funcs = 0;
new->link = filelist;
filelist = new;
}
}
if ((nfuncs = getd()) < 0)
return -1;
for (i = 0; i < nfuncs; i++) {
struct func *q;
char *name, *file;
int f, x, y, count;
if ((name = getstr()) == 0 || (f = getd()) <= 0
|| (x = getd()) < 0 || (y = getd()) < 0 || (count = getd()) < 0)
return -1;
q = afunction(name, files[f-1], x, y, count);
if ((name = getstr()) == 0 || (file = getstr()) == 0
|| (x = getd()) < 0 || (y = getd()) < 0)
return -1;
if (*name != '?')
acaller(name, file, x, y, count, q);
}
if ((npoints = getd()) < 0)
return -1;
for (i = 0; i < npoints; i++) {
int f, x, y, count;
if ((f = getd()) < 0 || (x = getd()) < 0 || (y = getd()) < 0
|| (count = getd()) < 0)
return -1;
if (f)
apoint(i, files[f-1], x, y, count);
}
return 1;
}
/* process - read prof.out data from file */
int process(char *file) {
int more;
if ((fp = fopen(file, "r")) != NULL) {
struct file *p;
while ((more = gather()) > 0)
;
fclose(fp);
if (more < 0)
return more;
for (p = filelist; p; p = p->link)
qsort(p->counts, p->count, sizeof *p->counts,
(int (*)(const void *, const void *))
compare);
return 1;
}
return 0;
}
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