| 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" |
| 11 | #include "gmon.h" /* fetch header for old format */ |
| 12 | #include "gprof.h" |
| 13 | #include "hertz.h" |
| 14 | #include "hist.h" |
| 15 | #include "libiberty.h" |
| 16 | |
| 17 | int gmon_input = 0; |
| 18 | int gmon_file_version = 0; /* 0 == old (non-versioned) file format */ |
| 19 | |
| 20 | /* |
| 21 | * This probably ought to be in libbfd. |
| 22 | */ |
| 23 | bfd_vma |
| 24 | DEFUN (get_vma, (abfd, addr), bfd * abfd AND bfd_byte * addr) |
| 25 | { |
| 26 | switch (sizeof (char*)) |
| 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", |
| 34 | whoami, (long) sizeof (char*)); |
| 35 | done (1); |
| 36 | } |
| 37 | } |
| 38 | |
| 39 | |
| 40 | /* |
| 41 | * This probably ought to be in libbfd. |
| 42 | */ |
| 43 | void |
| 44 | DEFUN (put_vma, (abfd, val, addr), bfd * abfd AND bfd_vma val AND bfd_byte * addr) |
| 45 | { |
| 46 | switch (sizeof (char*)) |
| 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", |
| 56 | whoami, (long) sizeof (char*)); |
| 57 | done (1); |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | |
| 62 | void |
| 63 | DEFUN (gmon_out_read, (filename), const char *filename) |
| 64 | { |
| 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); |
| 83 | } |
| 84 | } |
| 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); |
| 90 | } |
| 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); |
| 100 | } |
| 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); |
| 111 | } |
| 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); |
| 141 | } |
| 142 | } |
| 143 | } |
| 144 | else if (file_format == FF_AUTO || file_format == FF_BSD) |
| 145 | { |
| 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) |
| 172 | { |
| 173 | perror (filename); |
| 174 | done (1); |
| 175 | } |
| 176 | if (fread (&raw, 1, sizeof (struct raw_phdr), ifp) |
| 177 | != sizeof (struct raw_phdr)) |
| 178 | { |
| 179 | fprintf (stderr, "%s: file too short to be a gmon file\n", |
| 180 | filename); |
| 181 | done (1); |
| 182 | } |
| 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 | |
| 187 | #ifdef BSD44_FORMAT |
| 188 | { |
| 189 | int profrate; |
| 190 | |
| 191 | profrate = bfd_get_32 (core_bfd, (bfd_byte *) &raw.profrate[0]); |
| 192 | if (!s_highpc) |
| 193 | hz = profrate; |
| 194 | else if (hz != profrate) |
| 195 | { |
| 196 | fprintf (stderr, |
| 197 | "%s: profiling rate incompatible with first gmon file\n", |
| 198 | filename); |
| 199 | done (1); |
| 200 | } |
| 201 | } |
| 202 | #endif |
| 203 | |
| 204 | if (s_highpc && (tmp.low_pc != h.low_pc || |
| 205 | tmp.high_pc != h.high_pc || tmp.ncnt != h.ncnt)) |
| 206 | { |
| 207 | fprintf (stderr, "%s: incompatible with first gmon file\n", |
| 208 | filename); |
| 209 | done (1); |
| 210 | } |
| 211 | h = tmp; |
| 212 | s_lowpc = (bfd_vma) h.low_pc; |
| 213 | s_highpc = (bfd_vma) h.high_pc; |
| 214 | lowpc = (bfd_vma) h.low_pc / sizeof (UNIT); |
| 215 | highpc = (bfd_vma) h.high_pc / sizeof (UNIT); |
| 216 | samp_bytes = h.ncnt - sizeof (struct raw_phdr); |
| 217 | hist_num_bins = samp_bytes / sizeof (UNIT); |
| 218 | DBG (SAMPLEDEBUG, |
| 219 | printf ("[gmon_out_read] lowpc 0x%lx highpc 0x%lx ncnt %d\n", |
| 220 | h.low_pc, h.high_pc, h.ncnt); |
| 221 | printf ("[gmon_out_read] s_lowpc 0x%lx s_highpc 0x%lx\n", |
| 222 | s_lowpc, s_highpc); |
| 223 | printf ("[gmon_out_read] lowpc 0x%lx highpc 0x%lx\n", |
| 224 | lowpc, highpc); |
| 225 | printf ("[gmon_out_read] samp_bytes %d hist_num_bins %d\n", |
| 226 | samp_bytes, hist_num_bins)); |
| 227 | |
| 228 | if (hist_num_bins) |
| 229 | { |
| 230 | ++nhist; |
| 231 | } |
| 232 | |
| 233 | if (!hist_sample) |
| 234 | { |
| 235 | hist_sample = |
| 236 | (int *) xmalloc (hist_num_bins * sizeof (hist_sample[0])); |
| 237 | memset (hist_sample, 0, hist_num_bins * sizeof (hist_sample[0])); |
| 238 | } |
| 239 | |
| 240 | for (i = 0; i < hist_num_bins; ++i) |
| 241 | { |
| 242 | if (fread (raw_bin_count, sizeof (raw_bin_count), 1, ifp) != 1) |
| 243 | { |
| 244 | fprintf (stderr, |
| 245 | "%s: unexpected EOF after reading %d/%d bins\n", |
| 246 | whoami, --i, hist_num_bins); |
| 247 | done (1); |
| 248 | } |
| 249 | hist_sample[i] += bfd_get_16 (core_bfd, (bfd_byte *) raw_bin_count); |
| 250 | } |
| 251 | |
| 252 | /* |
| 253 | * The rest of the file consists of a bunch of <from,self,count> |
| 254 | * tuples: |
| 255 | */ |
| 256 | while (fread (&raw_arc, sizeof (raw_arc), 1, ifp) == 1) |
| 257 | { |
| 258 | ++narcs; |
| 259 | from_pc = get_vma (core_bfd, (bfd_byte *) raw_arc.from_pc); |
| 260 | self_pc = get_vma (core_bfd, (bfd_byte *) raw_arc.self_pc); |
| 261 | count = bfd_get_32 (core_bfd, (bfd_byte *) raw_arc.count); |
| 262 | DBG (SAMPLEDEBUG, |
| 263 | printf ("[gmon_out_read] frompc 0x%lx selfpc 0x%lx count %d\n", |
| 264 | from_pc, self_pc, count)); |
| 265 | /* add this arc: */ |
| 266 | cg_tally (from_pc, self_pc, count); |
| 267 | } |
| 268 | fclose (ifp); |
| 269 | |
| 270 | if (hz == HZ_WRONG) |
| 271 | { |
| 272 | /* |
| 273 | * How many ticks per second? If we can't tell, report |
| 274 | * time in ticks. |
| 275 | */ |
| 276 | hz = hertz (); |
| 277 | if (hz == HZ_WRONG) |
| 278 | { |
| 279 | hz = 1; |
| 280 | fprintf (stderr, "time is in ticks, not seconds\n"); |
| 281 | } |
| 282 | } |
| 283 | } |
| 284 | else |
| 285 | { |
| 286 | fprintf (stderr, "%s: don't know how to deal with file format %d\n", |
| 287 | whoami, file_format); |
| 288 | done (1); |
| 289 | } |
| 290 | |
| 291 | if (output_style & STYLE_GMON_INFO) |
| 292 | { |
| 293 | printf ("File `%s' (version %d) contains:\n", |
| 294 | filename, gmon_file_version); |
| 295 | printf ("\t%d histogram record%s\n", |
| 296 | nhist, nhist == 1 ? "" : "s"); |
| 297 | printf ("\t%d call-graph record%s\n", |
| 298 | narcs, narcs == 1 ? "" : "s"); |
| 299 | printf ("\t%d basic-block count record%s\n", |
| 300 | nbbs, nbbs == 1 ? "" : "s"); |
| 301 | first_output = FALSE; |
| 302 | } |
| 303 | } |
| 304 | |
| 305 | |
| 306 | void |
| 307 | DEFUN (gmon_out_write, (filename), const char *filename) |
| 308 | { |
| 309 | FILE *ofp; |
| 310 | struct gmon_hdr ghdr; |
| 311 | |
| 312 | ofp = fopen (filename, FOPEN_WB); |
| 313 | if (!ofp) |
| 314 | { |
| 315 | perror (filename); |
| 316 | done (1); |
| 317 | } |
| 318 | |
| 319 | if (file_format == FF_AUTO || file_format == FF_MAGIC) |
| 320 | { |
| 321 | /* write gmon header: */ |
| 322 | |
| 323 | memcpy (&ghdr.cookie[0], GMON_MAGIC, 4); |
| 324 | bfd_put_32 (core_bfd, GMON_VERSION, (bfd_byte *) ghdr.version); |
| 325 | if (fwrite (&ghdr, sizeof (ghdr), 1, ofp) != 1) |
| 326 | { |
| 327 | perror (filename); |
| 328 | done (1); |
| 329 | } |
| 330 | |
| 331 | /* write execution time histogram if we have one: */ |
| 332 | if (gmon_input & INPUT_HISTOGRAM) |
| 333 | { |
| 334 | hist_write_hist (ofp, filename); |
| 335 | } |
| 336 | |
| 337 | /* write call graph arcs if we have any: */ |
| 338 | if (gmon_input & INPUT_CALL_GRAPH) |
| 339 | { |
| 340 | cg_write_arcs (ofp, filename); |
| 341 | } |
| 342 | |
| 343 | /* write basic-block info if we have it: */ |
| 344 | if (gmon_input & INPUT_BB_COUNTS) |
| 345 | { |
| 346 | bb_write_blocks (ofp, filename); |
| 347 | } |
| 348 | } |
| 349 | else if (file_format == FF_BSD) |
| 350 | { |
| 351 | struct raw_arc raw_arc; |
| 352 | UNIT raw_bin_count; |
| 353 | bfd_vma lpc, hpc; |
| 354 | int i, ncnt; |
| 355 | Arc *arc; |
| 356 | Sym *sym; |
| 357 | |
| 358 | put_vma (core_bfd, s_lowpc, (bfd_byte *) & lpc); |
| 359 | put_vma (core_bfd, s_highpc, (bfd_byte *) & hpc); |
| 360 | bfd_put_32 (core_bfd, |
| 361 | hist_num_bins * sizeof (UNIT) + sizeof (struct raw_phdr), |
| 362 | (bfd_byte *) & ncnt); |
| 363 | |
| 364 | /* write header: */ |
| 365 | if (fwrite (&lpc, sizeof (lpc), 1, ofp) != 1 |
| 366 | || fwrite (&hpc, sizeof (hpc), 1, ofp) != 1 |
| 367 | || fwrite (&ncnt, sizeof (ncnt), 1, ofp) != 1) |
| 368 | { |
| 369 | perror (filename); |
| 370 | done (1); |
| 371 | } |
| 372 | |
| 373 | /* dump the samples: */ |
| 374 | |
| 375 | for (i = 0; i < hist_num_bins; ++i) |
| 376 | { |
| 377 | bfd_put_16 (core_bfd, hist_sample[i], (bfd_byte *) & raw_bin_count[0]); |
| 378 | if (fwrite (&raw_bin_count[0], sizeof (raw_bin_count), 1, ofp) != 1) |
| 379 | { |
| 380 | perror (filename); |
| 381 | done (1); |
| 382 | } |
| 383 | } |
| 384 | |
| 385 | /* dump the normalized raw arc information: */ |
| 386 | |
| 387 | for (sym = symtab.base; sym < symtab.limit; ++sym) |
| 388 | { |
| 389 | for (arc = sym->cg.children; arc; arc = arc->next_child) |
| 390 | { |
| 391 | put_vma (core_bfd, arc->parent->addr, |
| 392 | (bfd_byte *) raw_arc.from_pc); |
| 393 | put_vma (core_bfd, arc->child->addr, |
| 394 | (bfd_byte *) raw_arc.self_pc); |
| 395 | bfd_put_32 (core_bfd, arc->count, (bfd_byte *) raw_arc.count); |
| 396 | if (fwrite (&raw_arc, sizeof (raw_arc), 1, ofp) != 1) |
| 397 | { |
| 398 | perror (filename); |
| 399 | done (1); |
| 400 | } |
| 401 | DBG (SAMPLEDEBUG, |
| 402 | printf ("[dumpsum] frompc 0x%lx selfpc 0x%lx count %d\n", |
| 403 | arc->parent->addr, arc->child->addr, arc->count)); |
| 404 | } |
| 405 | } |
| 406 | fclose (ofp); |
| 407 | } |
| 408 | else |
| 409 | { |
| 410 | fprintf (stderr, "%s: don't know how to deal with file format %d\n", |
| 411 | whoami, file_format); |
| 412 | done (1); |
| 413 | } |
| 414 | } |