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#include "c.h"
struct callsite {
char *file, *name;
union coordinate {
unsigned int coord;
struct { unsigned int y:16,x:10,index:6; } le;
struct { unsigned int index:6,x:10,y:16; } be;
} u;
};
struct func {
struct func *link;
struct caller *callers;
char *name;
union coordinate src;
};
struct map { /* source code map; 200 coordinates/map */
int size;
union coordinate u[200];
};
int npoints; /* # of execution points if -b specified */
int ncalled = -1; /* #times prof.out says current function was called */
static Symbol YYlink; /* symbol for file's struct _bbdata */
static Symbol YYcounts; /* symbol for _YYcounts if -b specified */
static List maplist; /* list of struct map *'s */
static List filelist; /* list of file names */
static Symbol funclist; /* list of struct func *'s */
static Symbol afunc; /* current function's struct func */
/* bbcall - build tree to set _callsite at call site *cp, emit call site data */
static void bbcall(Symbol yycounts, Coordinate *cp, Tree *e) {
static Symbol caller;
Value v;
union coordinate u;
Symbol p = genident(STATIC, array(voidptype, 0, 0), GLOBAL);
Tree t = *e;
defglobal(p, LIT);
defpointer(cp->file ? mkstr(cp->file)->u.c.loc : (Symbol)0);
defpointer(mkstr(cfunc->name)->u.c.loc);
if (IR->little_endian) {
u.le.x = cp->x;
u.le.y = cp->y;
} else {
u.be.x = cp->x;
u.be.y = cp->y;
}
(*IR->defconst)(U, unsignedtype->size, (v.u = u.coord, v));
if (caller == 0) {
caller = mksymbol(EXTERN, "_caller", ptr(voidptype));
caller->defined = 0;
}
if (generic((*e)->op) != CALL)
t = (*e)->kids[0];
assert(generic(t->op) == CALL);
t = tree(t->op, t->type,
tree(RIGHT, t->kids[0]->type,
t->kids[0],
tree(RIGHT, t->kids[0]->type, asgn(caller, idtree(p)), t->kids[0])),
t->kids[1]);
if (generic((*e)->op) != CALL)
t = tree((*e)->op, (*e)->type, t, (*e)->kids[1]);
*e = t;
}
/* bbentry - return tree for _prologue(&afunc, &YYlink)' */
static void bbentry(Symbol yylink, Symbol f) {
static Symbol prologue;
afunc = genident(STATIC, array(voidptype, 4, 0), GLOBAL);
if (prologue == 0) {
prologue = mksymbol(EXTERN, "_prologue", ftype(inttype, voidptype));
prologue->defined = 0;
}
walk(vcall(prologue, voidtype, pointer(idtree(afunc)), pointer(idtree(yylink)), NULL), 0, 0);
}
/* bbexit - return tree for _epilogue(&afunc)' */
static void bbexit(Symbol yylink, Symbol f, Tree e) {
static Symbol epilogue;
if (epilogue == 0) {
epilogue = mksymbol(EXTERN, "_epilogue", ftype(inttype, voidptype));
epilogue->defined = 0;
}
walk(vcall(epilogue, voidtype, pointer(idtree(afunc)), NULL), 0, 0);
}
/* bbfile - add file to list of file names, return its index */
static int bbfile(char *file) {
if (file) {
List lp;
int i = 1;
if ((lp = filelist) != NULL)
do {
lp = lp->link;
if (((Symbol)lp->x)->u.c.v.p == file)
return i;
i++;
} while (lp != filelist);
filelist = append(mkstr(file), filelist);
return i;
}
return 0;
}
/* bbfunc - emit function name and src coordinates */
static void bbfunc(Symbol yylink, Symbol f) {
Value v;
union coordinate u;
defglobal(afunc, DATA);
defpointer(funclist);
defpointer(NULL);
defpointer(mkstr(f->name)->u.c.loc);
if (IR->little_endian) {
u.le.x = f->u.f.pt.x;
u.le.y = f->u.f.pt.y;
u.le.index = bbfile(f->u.f.pt.file);
} else {
u.be.x = f->u.f.pt.x;
u.be.y = f->u.f.pt.y;
u.be.index = bbfile(f->u.f.pt.file);
}
(*IR->defconst)(U, unsignedtype->size, (v.u = u.coord, v));
funclist = afunc;
}
/* bbincr - build tree to increment execution point at *cp */
static void bbincr(Symbol yycounts, Coordinate *cp, Tree *e) {
struct map *mp = maplist->x;
Tree t;
/* append *cp to source map */
if (mp->size >= NELEMS(mp->u)) {
NEW(mp, PERM);
mp->size = 0;
maplist = append(mp, maplist);
}
if (IR->little_endian) {
mp->u[mp->size].le.x = cp->x;
mp->u[mp->size].le.y = cp->y;
mp->u[mp->size++].le.index = bbfile(cp->file);
} else {
mp->u[mp->size].be.x = cp->x;
mp->u[mp->size].be.y = cp->y;
mp->u[mp->size++].be.index = bbfile(cp->file);
}
t = incr('+', rvalue((*optree['+'])(ADD, pointer(idtree(yycounts)),
consttree(npoints++, inttype))), consttree(1, inttype));
if (*e)
*e = tree(RIGHT, (*e)->type, t, *e);
else
*e = t;
}
/* bbvars - emit definition for basic block counting data */
static void bbvars(Symbol yylink) {
int i, j, n = npoints;
Value v;
struct map **mp;
Symbol coords, files, *p;
if (!YYcounts && !yylink)
return;
if (YYcounts) {
if (n <= 0)
n = 1;
YYcounts->type = array(unsignedtype, n, 0);
defglobal(YYcounts, BSS);
}
files = genident(STATIC, array(charptype, 1, 0), GLOBAL);
defglobal(files, LIT);
for (p = ltov(&filelist, PERM); *p; p++)
defpointer((*p)->u.c.loc);
defpointer(NULL);
coords = genident(STATIC, array(unsignedtype, n, 0), GLOBAL);
defglobal(coords, LIT);
for (i = n, mp = ltov(&maplist, PERM); *mp; i -= (*mp)->size, mp++)
for (j = 0; j < (*mp)->size; j++)
(*IR->defconst)(U, unsignedtype->size, (v.u = (*mp)->u[j].coord, v));
if (i > 0)
(*IR->space)(i*coords->type->type->size);
defpointer(NULL);
defglobal(yylink, DATA);
defpointer(NULL);
(*IR->defconst)(U, unsignedtype->size, (v.u = n, v));
defpointer(YYcounts);
defpointer(coords);
defpointer(files);
defpointer(funclist);
}
/* profInit - initialize basic block profiling options */
void prof_init(int argc, char *argv[]) {
int i;
static int inited;
if (inited)
return;
inited = 1;
type_init(argc, argv);
if (IR)
for (i = 1; i < argc; i++)
if (strncmp(argv[i], "-a", 2) == 0) {
if (ncalled == -1
&& process(argv[i][2] ? &argv[i][2] : "prof.out") > 0)
ncalled = 0;
} else if ((strcmp(argv[i], "-b") == 0
|| strcmp(argv[i], "-C") == 0) && YYlink == 0) {
YYlink = genident(STATIC, array(unsignedtype, 0, 0), GLOBAL);
attach((Apply)bbentry, YYlink, &events.entry);
attach((Apply)bbexit, YYlink, &events.returns);
attach((Apply)bbfunc, YYlink, &events.exit);
attach((Apply)bbvars, YYlink, &events.end);
if (strcmp(argv[i], "-b") == 0) {
YYcounts = genident(STATIC, array(unsignedtype, 0, 0), GLOBAL);
maplist = append(allocate(sizeof (struct map), PERM), maplist);
((struct map *)maplist->x)->size = 0;
attach((Apply)bbcall, YYcounts, &events.calls);
attach((Apply)bbincr, YYcounts, &events.points);
}
}
}
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