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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 | 38 | |
3996f34b | 39 | #include <errno.h> |
11c981a9 RM |
40 | #include <stdio.h> |
41 | #include <fcntl.h> | |
b20e47cb RM |
42 | #include <unistd.h> |
43 | ||
44 | #include <stdio.h> | |
11c981a9 RM |
45 | #include <stdlib.h> |
46 | #include <string.h> | |
47 | #include <unistd.h> | |
48 | ||
8f2ece69 UD |
49 | extern char *_strerror_internal __P ((int, char *buf, size_t)); |
50 | ||
a68b0d31 | 51 | extern int __profile_frequency __P ((void)); |
d68171ed | 52 | |
b20e47cb RM |
53 | struct __bb *__bb_head; /* Head of basic-block list or NULL. */ |
54 | ||
11c981a9 RM |
55 | struct gmonparam _gmonparam = { GMON_PROF_OFF }; |
56 | ||
b20e47cb RM |
57 | /* |
58 | * See profil(2) where this is described: | |
59 | */ | |
11c981a9 | 60 | static int s_scale; |
11c981a9 RM |
61 | #define SCALE_1_TO_1 0x10000L |
62 | ||
b236e99d | 63 | #define ERR(s) write(2, s, sizeof(s) - 1) |
b20e47cb | 64 | |
11336c16 | 65 | void moncontrol __P ((int mode)); |
3996f34b | 66 | void __moncontrol __P ((int mode)); |
11336c16 UD |
67 | static void write_hist __P ((int fd)); |
68 | static void write_call_graph __P ((int fd)); | |
69 | static void write_bb_counts __P ((int fd)); | |
70 | ||
b20e47cb RM |
71 | /* |
72 | * Control profiling | |
73 | * profiling is what mcount checks to see if | |
74 | * all the data structures are ready. | |
75 | */ | |
76 | void | |
3996f34b | 77 | __moncontrol (mode) |
a68b0d31 | 78 | int mode; |
b20e47cb RM |
79 | { |
80 | struct gmonparam *p = &_gmonparam; | |
81 | ||
82 | if (mode) | |
83 | { | |
84 | /* start */ | |
85 | profil((void *) p->kcount, p->kcountsize, p->lowpc, s_scale); | |
86 | p->state = GMON_PROF_ON; | |
87 | } | |
88 | else | |
89 | { | |
90 | /* stop */ | |
91 | profil((void *) 0, 0, 0, 0); | |
92 | p->state = GMON_PROF_OFF; | |
93 | } | |
94 | } | |
11c981a9 | 95 | |
11c981a9 RM |
96 | |
97 | void | |
3996f34b | 98 | __monstartup (lowpc, highpc) |
a68b0d31 UD |
99 | u_long lowpc; |
100 | u_long highpc; | |
11c981a9 | 101 | { |
b20e47cb RM |
102 | register int o; |
103 | char *cp; | |
104 | struct gmonparam *p = &_gmonparam; | |
105 | ||
106 | /* | |
107 | * round lowpc and highpc to multiples of the density we're using | |
108 | * so the rest of the scaling (here and in gprof) stays in ints. | |
109 | */ | |
110 | p->lowpc = ROUNDDOWN(lowpc, HISTFRACTION * sizeof(HISTCOUNTER)); | |
111 | p->highpc = ROUNDUP(highpc, HISTFRACTION * sizeof(HISTCOUNTER)); | |
112 | p->textsize = p->highpc - p->lowpc; | |
113 | p->kcountsize = p->textsize / HISTFRACTION; | |
114 | p->hashfraction = HASHFRACTION; | |
115 | p->log_hashfraction = -1; | |
116 | if ((HASHFRACTION & (HASHFRACTION - 1)) == 0) { | |
117 | /* if HASHFRACTION is a power of two, mcount can use shifting | |
118 | instead of integer division. Precompute shift amount. */ | |
119 | p->log_hashfraction = ffs(p->hashfraction * sizeof(*p->froms)) - 1; | |
120 | } | |
121 | p->fromssize = p->textsize / HASHFRACTION; | |
122 | p->tolimit = p->textsize * ARCDENSITY / 100; | |
123 | if (p->tolimit < MINARCS) | |
124 | p->tolimit = MINARCS; | |
125 | else if (p->tolimit > MAXARCS) | |
126 | p->tolimit = MAXARCS; | |
127 | p->tossize = p->tolimit * sizeof(struct tostruct); | |
11c981a9 | 128 | |
0413b54c | 129 | cp = calloc (p->kcountsize + p->fromssize + p->tossize, 1); |
b20e47cb RM |
130 | if (! cp) |
131 | { | |
e7fd8a39 | 132 | ERR(_("monstartup: out of memory\n")); |
b20e47cb RM |
133 | return; |
134 | } | |
b20e47cb RM |
135 | p->tos = (struct tostruct *)cp; |
136 | cp += p->tossize; | |
137 | p->kcount = (u_short *)cp; | |
138 | cp += p->kcountsize; | |
139 | p->froms = (u_short *)cp; | |
11c981a9 | 140 | |
b20e47cb RM |
141 | p->tos[0].link = 0; |
142 | ||
143 | o = p->highpc - p->lowpc; | |
d68171ed | 144 | if (p->kcountsize < (u_long) o) |
b20e47cb | 145 | { |
11c981a9 | 146 | #ifndef hp300 |
b20e47cb RM |
147 | s_scale = ((float)p->kcountsize / o ) * SCALE_1_TO_1; |
148 | #else | |
149 | /* avoid floating point operations */ | |
150 | int quot = o / p->kcountsize; | |
151 | ||
152 | if (quot >= 0x10000) | |
153 | s_scale = 1; | |
154 | else if (quot >= 0x100) | |
155 | s_scale = 0x10000 / quot; | |
156 | else if (o >= 0x800000) | |
157 | s_scale = 0x1000000 / (o / (p->kcountsize >> 8)); | |
158 | else | |
159 | s_scale = 0x1000000 / ((o << 8) / p->kcountsize); | |
11c981a9 | 160 | #endif |
b20e47cb RM |
161 | } else |
162 | s_scale = SCALE_1_TO_1; | |
11c981a9 | 163 | |
3996f34b | 164 | __moncontrol(1); |
11c981a9 | 165 | } |
8f2ece69 | 166 | weak_alias(__monstartup, monstartup) |
11c981a9 | 167 | |
b20e47cb RM |
168 | |
169 | static void | |
a68b0d31 UD |
170 | write_hist (fd) |
171 | int fd; | |
11c981a9 | 172 | { |
5ae9d168 UD |
173 | u_char tag = GMON_TAG_TIME_HIST; |
174 | struct gmon_hist_hdr thdr __attribute__ ((aligned (__alignof__ (char *)))); | |
11c981a9 | 175 | |
b20e47cb RM |
176 | if (_gmonparam.kcountsize > 0) |
177 | { | |
5ae9d168 UD |
178 | struct iovec iov[3] = |
179 | { | |
180 | { &tag, sizeof (tag) }, | |
181 | { &thdr, sizeof (struct gmon_hist_hdr) }, | |
182 | { _gmonparam.kcount, _gmonparam.kcountsize } | |
183 | }; | |
184 | ||
185 | *(char **) thdr.low_pc = (char *) _gmonparam.lowpc; | |
186 | *(char **) thdr.high_pc = (char *) _gmonparam.highpc; | |
3996f34b UD |
187 | *(int32_t *) thdr.hist_size = (_gmonparam.kcountsize |
188 | / sizeof (HISTCOUNTER)); | |
189 | *(int32_t *) thdr.prof_rate = __profile_frequency (); | |
5ae9d168 | 190 | strncpy (thdr.dimen, "seconds", sizeof (thdr.dimen)); |
b20e47cb | 191 | thdr.dimen_abbrev = 's'; |
11c981a9 | 192 | |
5ae9d168 | 193 | __writev (fd, iov, 3); |
b20e47cb | 194 | } |
11c981a9 RM |
195 | } |
196 | ||
b20e47cb RM |
197 | |
198 | static void | |
a68b0d31 UD |
199 | write_call_graph (fd) |
200 | int fd; | |
11c981a9 | 201 | { |
e7fd8a39 | 202 | #define NARCS_PER_WRITEV 32 |
5ae9d168 | 203 | u_char tag = GMON_TAG_CG_ARC; |
e7fd8a39 | 204 | struct gmon_cg_arc_record raw_arc[NARCS_PER_WRITEV] |
5ae9d168 | 205 | __attribute__ ((aligned (__alignof__ (char*)))); |
b20e47cb RM |
206 | int from_index, to_index, from_len; |
207 | u_long frompc; | |
e7fd8a39 UD |
208 | struct iovec iov[2 * NARCS_PER_WRITEV]; |
209 | int nfilled; | |
b20e47cb | 210 | |
e7fd8a39 | 211 | for (nfilled = 0; nfilled < NARCS_PER_WRITEV; ++nfilled) |
5ae9d168 | 212 | { |
e7fd8a39 UD |
213 | iov[2 * nfilled].iov_base = &tag; |
214 | iov[2 * nfilled].iov_len = sizeof (tag); | |
5ae9d168 | 215 | |
e7fd8a39 UD |
216 | iov[2 * nfilled + 1].iov_base = &raw_arc[nfilled]; |
217 | iov[2 * nfilled + 1].iov_len = sizeof (struct gmon_cg_arc_record); | |
218 | } | |
219 | ||
220 | nfilled = 0; | |
5ae9d168 | 221 | from_len = _gmonparam.fromssize / sizeof (*_gmonparam.froms); |
b20e47cb RM |
222 | for (from_index = 0; from_index < from_len; ++from_index) |
223 | { | |
224 | if (_gmonparam.froms[from_index] == 0) | |
225 | continue; | |
226 | ||
227 | frompc = _gmonparam.lowpc; | |
228 | frompc += (from_index * _gmonparam.hashfraction | |
5ae9d168 | 229 | * sizeof (*_gmonparam.froms)); |
b20e47cb RM |
230 | for (to_index = _gmonparam.froms[from_index]; |
231 | to_index != 0; | |
232 | to_index = _gmonparam.tos[to_index].link) | |
233 | { | |
e7fd8a39 UD |
234 | *(char **) raw_arc[nfilled].from_pc = (char *) frompc; |
235 | *(char **) raw_arc[nfilled].self_pc = | |
236 | (char *)_gmonparam.tos[to_index].selfpc; | |
237 | *(int *) raw_arc[nfilled].count = _gmonparam.tos[to_index].count; | |
238 | ||
239 | if (++nfilled == NARCS_PER_WRITEV) | |
3e5f5557 UD |
240 | { |
241 | __writev (fd, iov, 2 * nfilled); | |
242 | nfilled = 0; | |
243 | } | |
11c981a9 | 244 | } |
b20e47cb | 245 | } |
e7fd8a39 UD |
246 | if (nfilled > 0) |
247 | __writev (fd, iov, 2 * nfilled); | |
11c981a9 RM |
248 | } |
249 | ||
b20e47cb RM |
250 | |
251 | static void | |
a68b0d31 UD |
252 | write_bb_counts (fd) |
253 | int fd; | |
11c981a9 | 254 | { |
b20e47cb | 255 | struct __bb *grp; |
5ae9d168 | 256 | u_char tag = GMON_TAG_BB_COUNT; |
3e5f5557 UD |
257 | size_t ncounts; |
258 | size_t i; | |
b20e47cb | 259 | |
5ae9d168 UD |
260 | struct iovec bbhead[2] = |
261 | { | |
262 | { &tag, sizeof (tag) }, | |
263 | { &ncounts, sizeof (ncounts) } | |
264 | }; | |
3e5f5557 UD |
265 | struct iovec bbbody[8]; |
266 | size_t nfilled; | |
5ae9d168 | 267 | |
3e5f5557 UD |
268 | for (i = 0; i < (sizeof (bbbody) / sizeof (bbbody[0])); i += 2) |
269 | { | |
270 | bbbody[i].iov_len = sizeof (grp->addresses[0]); | |
271 | bbbody[i + 1].iov_len = sizeof (grp->counts[0]); | |
272 | } | |
5ae9d168 | 273 | |
b20e47cb RM |
274 | /* Write each group of basic-block info (all basic-blocks in a |
275 | compilation unit form a single group). */ | |
276 | ||
277 | for (grp = __bb_head; grp; grp = grp->next) | |
278 | { | |
279 | ncounts = grp->ncounts; | |
5ae9d168 | 280 | __writev (fd, bbhead, 2); |
e7fd8a39 | 281 | for (nfilled = i = 0; i < ncounts; ++i) |
b20e47cb | 282 | { |
3e5f5557 UD |
283 | if (nfilled > (sizeof (bbbody) / sizeof (bbbody[0])) - 2) |
284 | { | |
285 | __writev (fd, bbbody, nfilled); | |
286 | nfilled = 0; | |
287 | } | |
288 | ||
289 | bbbody[nfilled++].iov_base = (char *) &grp->addresses[i]; | |
290 | bbbody[nfilled++].iov_base = &grp->counts[i]; | |
b20e47cb | 291 | } |
e7fd8a39 UD |
292 | if (nfilled > 0) |
293 | __writev (fd, bbbody, nfilled); | |
b20e47cb | 294 | } |
11c981a9 RM |
295 | } |
296 | ||
297 | ||
0413b54c UD |
298 | static void |
299 | write_gmon (void) | |
b20e47cb | 300 | { |
5ae9d168 | 301 | struct gmon_hdr ghdr __attribute__ ((aligned (__alignof__ (int)))); |
b20e47cb RM |
302 | int fd; |
303 | ||
5ae9d168 | 304 | fd = __open ("gmon.out", O_CREAT|O_TRUNC|O_WRONLY, 0666); |
b20e47cb RM |
305 | if (fd < 0) |
306 | { | |
3996f34b UD |
307 | char buf[300]; |
308 | int errnum = errno; | |
309 | fprintf (stderr, "_mcleanup: gmon.out: %s\n", | |
310 | _strerror_internal (errnum, buf, sizeof buf)); | |
b20e47cb RM |
311 | return; |
312 | } | |
313 | ||
314 | /* write gmon.out header: */ | |
3996f34b | 315 | memset (&ghdr, '\0', sizeof (struct gmon_hdr)); |
5ae9d168 | 316 | memcpy (&ghdr.cookie[0], GMON_MAGIC, sizeof (ghdr.cookie)); |
3996f34b | 317 | *(int32_t *) ghdr.version = GMON_VERSION; |
5ae9d168 | 318 | __write (fd, &ghdr, sizeof (struct gmon_hdr)); |
b20e47cb RM |
319 | |
320 | /* write PC histogram: */ | |
5ae9d168 | 321 | write_hist (fd); |
b20e47cb RM |
322 | |
323 | /* write call-graph: */ | |
5ae9d168 | 324 | write_call_graph (fd); |
b20e47cb RM |
325 | |
326 | /* write basic-block execution counts: */ | |
5ae9d168 | 327 | write_bb_counts (fd); |
b20e47cb | 328 | |
0413b54c UD |
329 | __close (fd); |
330 | } | |
331 | ||
332 | ||
333 | void | |
334 | __write_profiling (void) | |
335 | { | |
336 | int save = _gmonparam.state; | |
337 | _gmonparam.state = GMON_PROF_OFF; | |
338 | if (save == GMON_PROF_ON) | |
339 | write_gmon (); | |
340 | _gmonparam.state = save; | |
341 | } | |
342 | weak_alias (__write_profiling, write_profiling) | |
343 | ||
344 | ||
345 | void | |
346 | _mcleanup (void) | |
347 | { | |
348 | __moncontrol (0); | |
349 | ||
350 | write_gmon (); | |
351 | ||
ebbad4cc UD |
352 | /* free the memory. */ |
353 | free (_gmonparam.tos); | |
b20e47cb | 354 | } |