1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
|
#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);
}
}
}
}
|
