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11c981a9 RM |
1 | /*- |
2 | * Copyright (c) 1983, 1992, 1993 | |
3 | * The Regents of the University of California. All rights reserved. | |
4 | * | |
5 | * Redistribution and use in source and binary forms, with or without | |
6 | * modification, are permitted provided that the following conditions | |
7 | * are met: | |
8 | * 1. Redistributions of source code must retain the above copyright | |
9 | * notice, this list of conditions and the following disclaimer. | |
10 | * 2. Redistributions in binary form must reproduce the above copyright | |
11 | * notice, this list of conditions and the following disclaimer in the | |
12 | * documentation and/or other materials provided with the distribution. | |
13 | * 3. All advertising materials mentioning features or use of this software | |
14 | * must display the following acknowledgement: | |
15 | * This product includes software developed by the University of | |
16 | * California, Berkeley and its contributors. | |
17 | * 4. Neither the name of the University nor the names of its contributors | |
18 | * may be used to endorse or promote products derived from this software | |
19 | * without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
31 | * SUCH DAMAGE. | |
32 | */ | |
11c981a9 RM |
33 | #include <sys/param.h> |
34 | #include <sys/time.h> | |
35 | #include <sys/gmon.h> | |
b20e47cb | 36 | #include <sys/gmon_out.h> |
5ae9d168 | 37 | #include <sys/uio.h> |
11c981a9 RM |
38 | |
39 | #include <stdio.h> | |
40 | #include <fcntl.h> | |
b20e47cb RM |
41 | #include <unistd.h> |
42 | ||
43 | #include <stdio.h> | |
11c981a9 RM |
44 | #include <stdlib.h> |
45 | #include <string.h> | |
46 | #include <unistd.h> | |
47 | ||
a68b0d31 | 48 | extern int __profile_frequency __P ((void)); |
d68171ed | 49 | |
b20e47cb RM |
50 | struct __bb *__bb_head; /* Head of basic-block list or NULL. */ |
51 | ||
11c981a9 RM |
52 | struct gmonparam _gmonparam = { GMON_PROF_OFF }; |
53 | ||
b20e47cb RM |
54 | /* |
55 | * See profil(2) where this is described: | |
56 | */ | |
11c981a9 | 57 | static int s_scale; |
11c981a9 RM |
58 | #define SCALE_1_TO_1 0x10000L |
59 | ||
b236e99d | 60 | #define ERR(s) write(2, s, sizeof(s) - 1) |
b20e47cb | 61 | |
11336c16 UD |
62 | void moncontrol __P ((int mode)); |
63 | static void write_hist __P ((int fd)); | |
64 | static void write_call_graph __P ((int fd)); | |
65 | static void write_bb_counts __P ((int fd)); | |
66 | ||
b20e47cb RM |
67 | /* |
68 | * Control profiling | |
69 | * profiling is what mcount checks to see if | |
70 | * all the data structures are ready. | |
71 | */ | |
72 | void | |
a68b0d31 UD |
73 | moncontrol (mode) |
74 | int mode; | |
b20e47cb RM |
75 | { |
76 | struct gmonparam *p = &_gmonparam; | |
77 | ||
78 | if (mode) | |
79 | { | |
80 | /* start */ | |
81 | profil((void *) p->kcount, p->kcountsize, p->lowpc, s_scale); | |
82 | p->state = GMON_PROF_ON; | |
83 | } | |
84 | else | |
85 | { | |
86 | /* stop */ | |
87 | profil((void *) 0, 0, 0, 0); | |
88 | p->state = GMON_PROF_OFF; | |
89 | } | |
90 | } | |
11c981a9 | 91 | |
11c981a9 RM |
92 | |
93 | void | |
a68b0d31 UD |
94 | monstartup (lowpc, highpc) |
95 | u_long lowpc; | |
96 | u_long highpc; | |
11c981a9 | 97 | { |
b20e47cb RM |
98 | register int o; |
99 | char *cp; | |
100 | struct gmonparam *p = &_gmonparam; | |
101 | ||
102 | /* | |
103 | * round lowpc and highpc to multiples of the density we're using | |
104 | * so the rest of the scaling (here and in gprof) stays in ints. | |
105 | */ | |
106 | p->lowpc = ROUNDDOWN(lowpc, HISTFRACTION * sizeof(HISTCOUNTER)); | |
107 | p->highpc = ROUNDUP(highpc, HISTFRACTION * sizeof(HISTCOUNTER)); | |
108 | p->textsize = p->highpc - p->lowpc; | |
109 | p->kcountsize = p->textsize / HISTFRACTION; | |
110 | p->hashfraction = HASHFRACTION; | |
111 | p->log_hashfraction = -1; | |
112 | if ((HASHFRACTION & (HASHFRACTION - 1)) == 0) { | |
113 | /* if HASHFRACTION is a power of two, mcount can use shifting | |
114 | instead of integer division. Precompute shift amount. */ | |
115 | p->log_hashfraction = ffs(p->hashfraction * sizeof(*p->froms)) - 1; | |
116 | } | |
117 | p->fromssize = p->textsize / HASHFRACTION; | |
118 | p->tolimit = p->textsize * ARCDENSITY / 100; | |
119 | if (p->tolimit < MINARCS) | |
120 | p->tolimit = MINARCS; | |
121 | else if (p->tolimit > MAXARCS) | |
122 | p->tolimit = MAXARCS; | |
123 | p->tossize = p->tolimit * sizeof(struct tostruct); | |
11c981a9 | 124 | |
b20e47cb RM |
125 | cp = malloc (p->kcountsize + p->fromssize + p->tossize); |
126 | if (! cp) | |
127 | { | |
e7fd8a39 | 128 | ERR(_("monstartup: out of memory\n")); |
b20e47cb RM |
129 | return; |
130 | } | |
131 | bzero(cp, p->kcountsize + p->fromssize + p->tossize); | |
132 | p->tos = (struct tostruct *)cp; | |
133 | cp += p->tossize; | |
134 | p->kcount = (u_short *)cp; | |
135 | cp += p->kcountsize; | |
136 | p->froms = (u_short *)cp; | |
11c981a9 | 137 | |
b20e47cb RM |
138 | p->tos[0].link = 0; |
139 | ||
140 | o = p->highpc - p->lowpc; | |
d68171ed | 141 | if (p->kcountsize < (u_long) o) |
b20e47cb | 142 | { |
11c981a9 | 143 | #ifndef hp300 |
b20e47cb RM |
144 | s_scale = ((float)p->kcountsize / o ) * SCALE_1_TO_1; |
145 | #else | |
146 | /* avoid floating point operations */ | |
147 | int quot = o / p->kcountsize; | |
148 | ||
149 | if (quot >= 0x10000) | |
150 | s_scale = 1; | |
151 | else if (quot >= 0x100) | |
152 | s_scale = 0x10000 / quot; | |
153 | else if (o >= 0x800000) | |
154 | s_scale = 0x1000000 / (o / (p->kcountsize >> 8)); | |
155 | else | |
156 | s_scale = 0x1000000 / ((o << 8) / p->kcountsize); | |
11c981a9 | 157 | #endif |
b20e47cb RM |
158 | } else |
159 | s_scale = SCALE_1_TO_1; | |
11c981a9 | 160 | |
b20e47cb | 161 | moncontrol(1); |
11c981a9 RM |
162 | } |
163 | ||
b20e47cb RM |
164 | |
165 | static void | |
a68b0d31 UD |
166 | write_hist (fd) |
167 | int fd; | |
11c981a9 | 168 | { |
5ae9d168 UD |
169 | u_char tag = GMON_TAG_TIME_HIST; |
170 | struct gmon_hist_hdr thdr __attribute__ ((aligned (__alignof__ (char *)))); | |
11c981a9 | 171 | |
b20e47cb RM |
172 | if (_gmonparam.kcountsize > 0) |
173 | { | |
5ae9d168 UD |
174 | struct iovec iov[3] = |
175 | { | |
176 | { &tag, sizeof (tag) }, | |
177 | { &thdr, sizeof (struct gmon_hist_hdr) }, | |
178 | { _gmonparam.kcount, _gmonparam.kcountsize } | |
179 | }; | |
180 | ||
181 | *(char **) thdr.low_pc = (char *) _gmonparam.lowpc; | |
182 | *(char **) thdr.high_pc = (char *) _gmonparam.highpc; | |
183 | *(int *) thdr.hist_size = _gmonparam.kcountsize / sizeof (HISTCOUNTER); | |
184 | *(int *) thdr.prof_rate = __profile_frequency (); | |
185 | strncpy (thdr.dimen, "seconds", sizeof (thdr.dimen)); | |
b20e47cb | 186 | thdr.dimen_abbrev = 's'; |
11c981a9 | 187 | |
5ae9d168 | 188 | __writev (fd, iov, 3); |
b20e47cb | 189 | } |
11c981a9 RM |
190 | } |
191 | ||
b20e47cb RM |
192 | |
193 | static void | |
a68b0d31 UD |
194 | write_call_graph (fd) |
195 | int fd; | |
11c981a9 | 196 | { |
e7fd8a39 | 197 | #define NARCS_PER_WRITEV 32 |
5ae9d168 | 198 | u_char tag = GMON_TAG_CG_ARC; |
e7fd8a39 | 199 | struct gmon_cg_arc_record raw_arc[NARCS_PER_WRITEV] |
5ae9d168 | 200 | __attribute__ ((aligned (__alignof__ (char*)))); |
b20e47cb RM |
201 | int from_index, to_index, from_len; |
202 | u_long frompc; | |
e7fd8a39 UD |
203 | struct iovec iov[2 * NARCS_PER_WRITEV]; |
204 | int nfilled; | |
b20e47cb | 205 | |
e7fd8a39 | 206 | for (nfilled = 0; nfilled < NARCS_PER_WRITEV; ++nfilled) |
5ae9d168 | 207 | { |
e7fd8a39 UD |
208 | iov[2 * nfilled].iov_base = &tag; |
209 | iov[2 * nfilled].iov_len = sizeof (tag); | |
5ae9d168 | 210 | |
e7fd8a39 UD |
211 | iov[2 * nfilled + 1].iov_base = &raw_arc[nfilled]; |
212 | iov[2 * nfilled + 1].iov_len = sizeof (struct gmon_cg_arc_record); | |
213 | } | |
214 | ||
215 | nfilled = 0; | |
5ae9d168 | 216 | from_len = _gmonparam.fromssize / sizeof (*_gmonparam.froms); |
b20e47cb RM |
217 | for (from_index = 0; from_index < from_len; ++from_index) |
218 | { | |
219 | if (_gmonparam.froms[from_index] == 0) | |
220 | continue; | |
221 | ||
222 | frompc = _gmonparam.lowpc; | |
223 | frompc += (from_index * _gmonparam.hashfraction | |
5ae9d168 | 224 | * sizeof (*_gmonparam.froms)); |
b20e47cb RM |
225 | for (to_index = _gmonparam.froms[from_index]; |
226 | to_index != 0; | |
227 | to_index = _gmonparam.tos[to_index].link) | |
228 | { | |
e7fd8a39 UD |
229 | *(char **) raw_arc[nfilled].from_pc = (char *) frompc; |
230 | *(char **) raw_arc[nfilled].self_pc = | |
231 | (char *)_gmonparam.tos[to_index].selfpc; | |
232 | *(int *) raw_arc[nfilled].count = _gmonparam.tos[to_index].count; | |
233 | ||
234 | if (++nfilled == NARCS_PER_WRITEV) | |
3e5f5557 UD |
235 | { |
236 | __writev (fd, iov, 2 * nfilled); | |
237 | nfilled = 0; | |
238 | } | |
11c981a9 | 239 | } |
b20e47cb | 240 | } |
e7fd8a39 UD |
241 | if (nfilled > 0) |
242 | __writev (fd, iov, 2 * nfilled); | |
11c981a9 RM |
243 | } |
244 | ||
b20e47cb RM |
245 | |
246 | static void | |
a68b0d31 UD |
247 | write_bb_counts (fd) |
248 | int fd; | |
11c981a9 | 249 | { |
b20e47cb | 250 | struct __bb *grp; |
5ae9d168 | 251 | u_char tag = GMON_TAG_BB_COUNT; |
3e5f5557 UD |
252 | size_t ncounts; |
253 | size_t i; | |
b20e47cb | 254 | |
5ae9d168 UD |
255 | struct iovec bbhead[2] = |
256 | { | |
257 | { &tag, sizeof (tag) }, | |
258 | { &ncounts, sizeof (ncounts) } | |
259 | }; | |
3e5f5557 UD |
260 | struct iovec bbbody[8]; |
261 | size_t nfilled; | |
5ae9d168 | 262 | |
3e5f5557 UD |
263 | for (i = 0; i < (sizeof (bbbody) / sizeof (bbbody[0])); i += 2) |
264 | { | |
265 | bbbody[i].iov_len = sizeof (grp->addresses[0]); | |
266 | bbbody[i + 1].iov_len = sizeof (grp->counts[0]); | |
267 | } | |
5ae9d168 | 268 | |
b20e47cb RM |
269 | /* Write each group of basic-block info (all basic-blocks in a |
270 | compilation unit form a single group). */ | |
271 | ||
272 | for (grp = __bb_head; grp; grp = grp->next) | |
273 | { | |
274 | ncounts = grp->ncounts; | |
5ae9d168 | 275 | __writev (fd, bbhead, 2); |
e7fd8a39 | 276 | for (nfilled = i = 0; i < ncounts; ++i) |
b20e47cb | 277 | { |
3e5f5557 UD |
278 | if (nfilled > (sizeof (bbbody) / sizeof (bbbody[0])) - 2) |
279 | { | |
280 | __writev (fd, bbbody, nfilled); | |
281 | nfilled = 0; | |
282 | } | |
283 | ||
284 | bbbody[nfilled++].iov_base = (char *) &grp->addresses[i]; | |
285 | bbbody[nfilled++].iov_base = &grp->counts[i]; | |
b20e47cb | 286 | } |
e7fd8a39 UD |
287 | if (nfilled > 0) |
288 | __writev (fd, bbbody, nfilled); | |
b20e47cb | 289 | } |
11c981a9 RM |
290 | } |
291 | ||
292 | ||
b20e47cb | 293 | void |
a68b0d31 | 294 | _mcleanup () |
b20e47cb | 295 | { |
5ae9d168 | 296 | struct gmon_hdr ghdr __attribute__ ((aligned (__alignof__ (int)))); |
b20e47cb RM |
297 | int fd; |
298 | ||
5ae9d168 UD |
299 | moncontrol (0); |
300 | fd = __open ("gmon.out", O_CREAT|O_TRUNC|O_WRONLY, 0666); | |
b20e47cb RM |
301 | if (fd < 0) |
302 | { | |
5ae9d168 | 303 | perror ("_mcleanup: gmon.out"); |
b20e47cb RM |
304 | return; |
305 | } | |
306 | ||
307 | /* write gmon.out header: */ | |
5ae9d168 UD |
308 | memset (&ghdr, 0, sizeof (struct gmon_hdr)); |
309 | memcpy (&ghdr.cookie[0], GMON_MAGIC, sizeof (ghdr.cookie)); | |
310 | *(int *) ghdr.version = GMON_VERSION; | |
311 | __write (fd, &ghdr, sizeof (struct gmon_hdr)); | |
b20e47cb RM |
312 | |
313 | /* write PC histogram: */ | |
5ae9d168 | 314 | write_hist (fd); |
b20e47cb RM |
315 | |
316 | /* write call-graph: */ | |
5ae9d168 | 317 | write_call_graph (fd); |
b20e47cb RM |
318 | |
319 | /* write basic-block execution counts: */ | |
5ae9d168 | 320 | write_bb_counts (fd); |
b20e47cb | 321 | |
5ae9d168 | 322 | __close (fd); |
b20e47cb | 323 | } |