* __bb_exit_func.c: New file, from David Mosberger-Tang.
[deliverable/binutils-gdb.git] / gprof / gmon_io.c
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1/*
2 * Input and output from/to gmon.out files.
3 */
4#include "cg_arcs.h"
5#include "basic_blocks.h"
6#include "bfd.h"
7#include "core.h"
8#include "call_graph.h"
9#include "gmon_io.h"
10#include "gmon_out.h"
12516a37 11#include "gmon.h" /* fetch header for old format */
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12#include "gprof.h"
13#include "hertz.h"
14#include "hist.h"
15#include "libiberty.h"
16
17int gmon_input = 0;
18int gmon_file_version = 0; /* 0 == old (non-versioned) file format */
19
20/*
21 * This probably ought to be in libbfd.
22 */
23bfd_vma
12516a37 24DEFUN (get_vma, (abfd, addr), bfd * abfd AND bfd_byte * addr)
5489fcc3 25{
03c35bcb 26 switch (sizeof (char*))
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27 {
28 case 4:
29 return bfd_get_32 (abfd, addr);
30 case 8:
31 return bfd_get_64 (abfd, addr);
32 default:
33 fprintf (stderr, "%s: bfd_vma has unexpected size of %ld bytes\n",
03c35bcb 34 whoami, (long) sizeof (char*));
12516a37 35 done (1);
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36 }
37}
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38
39
40/*
41 * This probably ought to be in libbfd.
42 */
43void
12516a37 44DEFUN (put_vma, (abfd, val, addr), bfd * abfd AND bfd_vma val AND bfd_byte * addr)
5489fcc3 45{
03c35bcb 46 switch (sizeof (char*))
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47 {
48 case 4:
49 bfd_put_32 (abfd, val, addr);
50 break;
51 case 8:
52 bfd_put_64 (abfd, val, addr);
53 break;
54 default:
55 fprintf (stderr, "%s: bfd_vma has unexpected size of %ld bytes\n",
03c35bcb 56 whoami, (long) sizeof (char*));
12516a37 57 done (1);
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58 }
59}
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60
61
62void
12516a37 63DEFUN (gmon_out_read, (filename), const char *filename)
5489fcc3 64{
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65 FILE *ifp;
66 struct gmon_hdr ghdr;
67 unsigned char tag;
68 int nhist = 0, narcs = 0, nbbs = 0;
69
70 /* open gmon.out file: */
71
72 if (strcmp (filename, "-") == 0)
73 {
74 ifp = stdin;
75 }
76 else
77 {
78 ifp = fopen (filename, FOPEN_RB);
79 if (!ifp)
80 {
81 perror (filename);
82 done (1);
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83 }
84 }
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85 if (fread (&ghdr, sizeof (struct gmon_hdr), 1, ifp) != 1)
86 {
87 fprintf (stderr, "%s: file too short to be a gmon file\n",
88 filename);
89 done (1);
03c35bcb 90 }
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91
92 if ((file_format == FF_MAGIC) ||
93 (file_format == FF_AUTO && !strncmp (&ghdr.cookie[0], GMON_MAGIC, 4)))
94 {
95 if (file_format == FF_MAGIC && strncmp (&ghdr.cookie[0], GMON_MAGIC, 4))
96 {
97 fprintf (stderr, "%s: file `%s' has bad magic cookie\n",
98 whoami, filename);
99 done (1);
03c35bcb 100 }
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101
102 /* right magic, so it's probably really a new gmon.out file */
103
104 gmon_file_version = bfd_get_32 (core_bfd, (bfd_byte *) ghdr.version);
105 if (gmon_file_version != GMON_VERSION && gmon_file_version != 0)
106 {
107 fprintf (stderr,
108 "%s: file `%s' has unsupported version %d\n",
109 whoami, filename, gmon_file_version);
110 done (1);
03c35bcb 111 }
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112
113 /* read in all the records: */
114 while (fread (&tag, sizeof (tag), 1, ifp) == 1)
115 {
116 switch (tag)
117 {
118 case GMON_TAG_TIME_HIST:
119 ++nhist;
120 gmon_input |= INPUT_HISTOGRAM;
121 hist_read_rec (ifp, filename);
122 break;
123
124 case GMON_TAG_CG_ARC:
125 ++narcs;
126 gmon_input |= INPUT_CALL_GRAPH;
127 cg_read_rec (ifp, filename);
128 break;
129
130 case GMON_TAG_BB_COUNT:
131 ++nbbs;
132 gmon_input |= INPUT_BB_COUNTS;
133 bb_read_rec (ifp, filename);
134 break;
135
136 default:
137 fprintf (stderr,
138 "%s: %s: found bad tag %d (file corrupted?)\n",
139 whoami, filename, tag);
140 done (1);
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141 }
142 }
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143 }
144 else if (file_format == FF_AUTO || file_format == FF_BSD)
5489fcc3 145 {
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146 struct hdr
147 {
148 bfd_vma low_pc;
149 bfd_vma high_pc;
150 int ncnt;
151 };
152 int i, samp_bytes, count;
153 bfd_vma from_pc, self_pc;
154 struct raw_arc raw_arc;
155 struct raw_phdr raw;
156 static struct hdr h;
157 UNIT raw_bin_count;
158 struct hdr tmp;
159
160 /*
161 * Information from a gmon.out file is in two parts: an array of
162 * sampling hits within pc ranges, and the arcs.
163 */
164 gmon_input = INPUT_HISTOGRAM | INPUT_CALL_GRAPH;
165
166 /*
167 * This fseek() ought to work even on stdin as long as it's
168 * not an interactive device (heck, is there anybody who would
169 * want to type in a gmon.out at the terminal?).
170 */
171 if (fseek (ifp, 0, SEEK_SET) < 0)
5489fcc3 172 {
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173 perror (filename);
174 done (1);
03c35bcb 175 }
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176 if (fread (&raw, 1, sizeof (struct raw_phdr), ifp)
177 != sizeof (struct raw_phdr))
5489fcc3 178 {
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179 fprintf (stderr, "%s: file too short to be a gmon file\n",
180 filename);
181 done (1);
03c35bcb 182 }
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183 tmp.low_pc = get_vma (core_bfd, (bfd_byte *) & raw.low_pc[0]);
184 tmp.high_pc = get_vma (core_bfd, (bfd_byte *) & raw.high_pc[0]);
185 tmp.ncnt = bfd_get_32 (core_bfd, (bfd_byte *) & raw.ncnt[0]);
186 if (s_highpc && (tmp.low_pc != h.low_pc ||
187 tmp.high_pc != h.high_pc || tmp.ncnt != h.ncnt))
5489fcc3 188 {
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189 fprintf (stderr, "%s: incompatible with first gmon file\n",
190 filename);
191 done (1);
03c35bcb 192 }
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193 h = tmp;
194 s_lowpc = (bfd_vma) h.low_pc;
195 s_highpc = (bfd_vma) h.high_pc;
196 lowpc = (bfd_vma) h.low_pc / sizeof (UNIT);
197 highpc = (bfd_vma) h.high_pc / sizeof (UNIT);
198 samp_bytes = h.ncnt - sizeof (struct raw_phdr);
199 hist_num_bins = samp_bytes / sizeof (UNIT);
200 DBG (SAMPLEDEBUG,
201 printf ("[gmon_out_read] lowpc 0x%lx highpc 0x%lx ncnt %d\n",
5489fcc3 202 h.low_pc, h.high_pc, h.ncnt);
12516a37 203 printf ("[gmon_out_read] s_lowpc 0x%lx s_highpc 0x%lx\n",
5489fcc3 204 s_lowpc, s_highpc);
12516a37 205 printf ("[gmon_out_read] lowpc 0x%lx highpc 0x%lx\n",
5489fcc3 206 lowpc, highpc);
12516a37 207 printf ("[gmon_out_read] samp_bytes %d hist_num_bins %d\n",
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208 samp_bytes, hist_num_bins));
209
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210 if (hist_num_bins)
211 {
212 ++nhist;
03c35bcb 213 }
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214
215 if (!hist_sample)
216 {
217 hist_sample =
218 (int *) xmalloc (hist_num_bins * sizeof (hist_sample[0]));
219 memset (hist_sample, 0, hist_num_bins * sizeof (hist_sample[0]));
03c35bcb 220 }
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221
222 for (i = 0; i < hist_num_bins; ++i)
223 {
224 if (fread (raw_bin_count, sizeof (raw_bin_count), 1, ifp) != 1)
225 {
226 fprintf (stderr,
227 "%s: unexpected EOF after reading %d/%d bins\n",
228 whoami, --i, hist_num_bins);
229 done (1);
03c35bcb 230 }
12516a37 231 hist_sample[i] += bfd_get_16 (core_bfd, (bfd_byte *) raw_bin_count);
03c35bcb 232 }
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233
234 /*
235 * The rest of the file consists of a bunch of <from,self,count>
236 * tuples:
237 */
238 while (fread (&raw_arc, sizeof (raw_arc), 1, ifp) == 1)
239 {
240 ++narcs;
241 from_pc = get_vma (core_bfd, (bfd_byte *) raw_arc.from_pc);
242 self_pc = get_vma (core_bfd, (bfd_byte *) raw_arc.self_pc);
243 count = bfd_get_32 (core_bfd, (bfd_byte *) raw_arc.count);
244 DBG (SAMPLEDEBUG,
245 printf ("[gmon_out_read] frompc 0x%lx selfpc 0x%lx count %d\n",
246 from_pc, self_pc, count));
247 /* add this arc: */
248 cg_tally (from_pc, self_pc, count);
03c35bcb 249 }
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250 fclose (ifp);
251
252 if (hz == HZ_WRONG)
253 {
254 /*
255 * How many ticks per second? If we can't tell, report
256 * time in ticks.
257 */
258 hz = hertz ();
259 if (hz == HZ_WRONG)
260 {
261 hz = 1;
262 fprintf (stderr, "time is in ticks, not seconds\n");
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263 }
264 }
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265 }
266 else
267 {
268 fprintf (stderr, "%s: don't know how to deal with file format %d\n",
269 whoami, file_format);
270 done (1);
03c35bcb 271 }
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272
273 if (output_style & STYLE_GMON_INFO)
274 {
275 printf ("File `%s' (version %d) contains:\n",
276 filename, gmon_file_version);
277 printf ("\t%d histogram record%s\n",
278 nhist, nhist == 1 ? "" : "s");
279 printf ("\t%d call-graph record%s\n",
280 narcs, narcs == 1 ? "" : "s");
281 printf ("\t%d basic-block count record%s\n",
282 nbbs, nbbs == 1 ? "" : "s");
283 first_output = FALSE;
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284 }
285}
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286
287
288void
12516a37 289DEFUN (gmon_out_write, (filename), const char *filename)
5489fcc3 290{
12516a37
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291 FILE *ofp;
292 struct gmon_hdr ghdr;
293
294 ofp = fopen (filename, FOPEN_WB);
295 if (!ofp)
296 {
297 perror (filename);
298 done (1);
03c35bcb 299 }
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300
301 if (file_format == FF_AUTO || file_format == FF_MAGIC)
302 {
303 /* write gmon header: */
304
305 memcpy (&ghdr.cookie[0], GMON_MAGIC, 4);
306 bfd_put_32 (core_bfd, GMON_VERSION, (bfd_byte *) ghdr.version);
307 if (fwrite (&ghdr, sizeof (ghdr), 1, ofp) != 1)
308 {
309 perror (filename);
310 done (1);
03c35bcb 311 }
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312
313 /* write execution time histogram if we have one: */
314 if (gmon_input & INPUT_HISTOGRAM)
315 {
316 hist_write_hist (ofp, filename);
03c35bcb 317 }
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318
319 /* write call graph arcs if we have any: */
320 if (gmon_input & INPUT_CALL_GRAPH)
321 {
322 cg_write_arcs (ofp, filename);
03c35bcb 323 }
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324
325 /* write basic-block info if we have it: */
326 if (gmon_input & INPUT_BB_COUNTS)
327 {
328 bb_write_blocks (ofp, filename);
03c35bcb 329 }
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330 }
331 else if (file_format == FF_BSD)
332 {
333 struct raw_arc raw_arc;
334 UNIT raw_bin_count;
335 bfd_vma lpc, hpc;
336 int i, ncnt;
337 Arc *arc;
338 Sym *sym;
339
340 put_vma (core_bfd, s_lowpc, (bfd_byte *) & lpc);
341 put_vma (core_bfd, s_highpc, (bfd_byte *) & hpc);
342 bfd_put_32 (core_bfd,
343 hist_num_bins * sizeof (UNIT) + sizeof (struct raw_phdr),
344 (bfd_byte *) & ncnt);
345
346 /* write header: */
347 if (fwrite (&lpc, sizeof (lpc), 1, ofp) != 1
348 || fwrite (&hpc, sizeof (hpc), 1, ofp) != 1
349 || fwrite (&ncnt, sizeof (ncnt), 1, ofp) != 1)
350 {
351 perror (filename);
352 done (1);
03c35bcb 353 }
12516a37
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354
355 /* dump the samples: */
356
357 for (i = 0; i < hist_num_bins; ++i)
5489fcc3 358 {
12516a37
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359 bfd_put_16 (core_bfd, hist_sample[i], (bfd_byte *) & raw_bin_count[0]);
360 if (fwrite (&raw_bin_count[0], sizeof (raw_bin_count), 1, ofp) != 1)
361 {
362 perror (filename);
363 done (1);
03c35bcb
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364 }
365 }
5489fcc3 366
12516a37 367 /* dump the normalized raw arc information: */
5489fcc3 368
12516a37
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369 for (sym = symtab.base; sym < symtab.limit; ++sym)
370 {
371 for (arc = sym->cg.children; arc; arc = arc->next_child)
5489fcc3 372 {
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373 put_vma (core_bfd, arc->parent->addr,
374 (bfd_byte *) raw_arc.from_pc);
375 put_vma (core_bfd, arc->child->addr,
376 (bfd_byte *) raw_arc.self_pc);
377 bfd_put_32 (core_bfd, arc->count, (bfd_byte *) raw_arc.count);
378 if (fwrite (&raw_arc, sizeof (raw_arc), 1, ofp) != 1)
379 {
380 perror (filename);
381 done (1);
03c35bcb 382 }
12516a37
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383 DBG (SAMPLEDEBUG,
384 printf ("[dumpsum] frompc 0x%lx selfpc 0x%lx count %d\n",
5489fcc3 385 arc->parent->addr, arc->child->addr, arc->count));
03c35bcb
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386 }
387 }
12516a37
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388 fclose (ofp);
389 }
390 else
391 {
392 fprintf (stderr, "%s: don't know how to deal with file format %d\n",
393 whoami, file_format);
394 done (1);
03c35bcb
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395 }
396}
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