| File: | build/gcc/gcov-dump.c |
| Warning: | line 376, column 25 Although the value stored to 'c' is used in the enclosing expression, the value is never actually read from 'c' |
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| 1 | /* Dump a gcov file, for debugging use. |
| 2 | Copyright (C) 2002-2021 Free Software Foundation, Inc. |
| 3 | Contributed by Nathan Sidwell <nathan@codesourcery.com> |
| 4 | |
| 5 | Gcov is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation; either version 3, or (at your option) |
| 8 | any later version. |
| 9 | |
| 10 | Gcov is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with Gcov; see the file COPYING3. If not see |
| 17 | <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include "config.h" |
| 20 | #include "system.h" |
| 21 | #include "coretypes.h" |
| 22 | #include "tm.h" |
| 23 | #include "version.h" |
| 24 | #include "intl.h" |
| 25 | #include "diagnostic.h" |
| 26 | #include <getopt.h> |
| 27 | #define IN_GCOV(-1) (-1) |
| 28 | #include "gcov-io.h" |
| 29 | #include "gcov-io.c" |
| 30 | |
| 31 | static void dump_gcov_file (const char *); |
| 32 | static void print_prefix (const char *, unsigned, gcov_position_t); |
| 33 | static void print_usage (void); |
| 34 | static void print_version (void); |
| 35 | static void tag_function (const char *, unsigned, int, unsigned); |
| 36 | static void tag_blocks (const char *, unsigned, int, unsigned); |
| 37 | static void tag_arcs (const char *, unsigned, int, unsigned); |
| 38 | static void tag_lines (const char *, unsigned, int, unsigned); |
| 39 | static void tag_counters (const char *, unsigned, int, unsigned); |
| 40 | static void tag_summary (const char *, unsigned, int, unsigned); |
| 41 | extern int main (int, char **); |
| 42 | |
| 43 | typedef struct tag_format |
| 44 | { |
| 45 | unsigned tag; |
| 46 | char const *name; |
| 47 | void (*proc) (const char *, unsigned, int, unsigned); |
| 48 | } tag_format_t; |
| 49 | |
| 50 | static int flag_dump_contents = 0; |
| 51 | static int flag_dump_positions = 0; |
| 52 | static int flag_dump_raw = 0; |
| 53 | |
| 54 | static const struct option options[] = |
| 55 | { |
| 56 | { "help", no_argument0, NULL__null, 'h' }, |
| 57 | { "version", no_argument0, NULL__null, 'v' }, |
| 58 | { "long", no_argument0, NULL__null, 'l' }, |
| 59 | { "positions", no_argument0, NULL__null, 'o' }, |
| 60 | { 0, 0, 0, 0 } |
| 61 | }; |
| 62 | |
| 63 | #define VALUE_PADDING_PREFIX" " " " |
| 64 | #define VALUE_PREFIX"%2d: " "%2d: " |
| 65 | |
| 66 | static const tag_format_t tag_table[] = |
| 67 | { |
| 68 | {0, "NOP", NULL__null}, |
| 69 | {0, "UNKNOWN", NULL__null}, |
| 70 | {0, "COUNTERS", tag_counters}, |
| 71 | {GCOV_TAG_FUNCTION((gcov_unsigned_t)0x01000000), "FUNCTION", tag_function}, |
| 72 | {GCOV_TAG_BLOCKS((gcov_unsigned_t)0x01410000), "BLOCKS", tag_blocks}, |
| 73 | {GCOV_TAG_ARCS((gcov_unsigned_t)0x01430000), "ARCS", tag_arcs}, |
| 74 | {GCOV_TAG_LINES((gcov_unsigned_t)0x01450000), "LINES", tag_lines}, |
| 75 | {GCOV_TAG_OBJECT_SUMMARY((gcov_unsigned_t)0xa1000000), "OBJECT_SUMMARY", tag_summary}, |
| 76 | {0, NULL__null, NULL__null} |
| 77 | }; |
| 78 | |
| 79 | int |
| 80 | main (int argc ATTRIBUTE_UNUSED__attribute__ ((__unused__)), char **argv) |
| 81 | { |
| 82 | int opt; |
| 83 | const char *p; |
| 84 | |
| 85 | p = argv[0] + strlen (argv[0]); |
| 86 | while (p != argv[0] && !IS_DIR_SEPARATOR (p[-1])(((p[-1]) == '/') || (((p[-1]) == '\\') && (0)))) |
| 87 | --p; |
| 88 | progname = p; |
| 89 | |
| 90 | xmalloc_set_program_name (progname); |
| 91 | |
| 92 | /* Unlock the stdio streams. */ |
| 93 | unlock_std_streams (); |
| 94 | |
| 95 | gcc_init_libintl (); |
| 96 | |
| 97 | diagnostic_initialize (global_dc, 0); |
| 98 | |
| 99 | while ((opt = getopt_long (argc, argv, "hlprvw", options, NULL__null)) != -1) |
| 100 | { |
| 101 | switch (opt) |
| 102 | { |
| 103 | case 'h': |
| 104 | print_usage (); |
| 105 | break; |
| 106 | case 'v': |
| 107 | print_version (); |
| 108 | break; |
| 109 | case 'l': |
| 110 | flag_dump_contents = 1; |
| 111 | break; |
| 112 | case 'p': |
| 113 | flag_dump_positions = 1; |
| 114 | break; |
| 115 | case 'r': |
| 116 | flag_dump_raw = 1; |
| 117 | break; |
| 118 | default: |
| 119 | fprintf (stderrstderr, "unknown flag `%c'\n", opt); |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | while (argv[optind]) |
| 124 | dump_gcov_file (argv[optind++]); |
| 125 | return 0; |
| 126 | } |
| 127 | |
| 128 | static void |
| 129 | print_usage (void) |
| 130 | { |
| 131 | printf ("Usage: gcov-dump [OPTION] ... gcovfiles\n"); |
| 132 | printf ("Print coverage file contents\n"); |
| 133 | printf (" -h, --help Print this help\n"); |
| 134 | printf (" -l, --long Dump record contents too\n"); |
| 135 | printf (" -p, --positions Dump record positions\n"); |
| 136 | printf (" -r, --raw Print content records in raw format\n"); |
| 137 | printf (" -v, --version Print version number\n"); |
| 138 | printf ("\nFor bug reporting instructions, please see:\n%s.\n", |
| 139 | bug_report_url); |
| 140 | } |
| 141 | |
| 142 | static void |
| 143 | print_version (void) |
| 144 | { |
| 145 | printf ("gcov-dump %s%s\n", pkgversion_string, version_string); |
| 146 | printf ("Copyright (C) 2021 Free Software Foundation, Inc.\n"); |
| 147 | printf ("This is free software; see the source for copying conditions. There is NO\n\ |
| 148 | warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\n"); |
| 149 | } |
| 150 | |
| 151 | static void |
| 152 | print_prefix (const char *filename, unsigned depth, gcov_position_t position) |
| 153 | { |
| 154 | static const char prefix[] = " "; |
| 155 | |
| 156 | printf ("%s:", filename); |
| 157 | if (flag_dump_positions) |
| 158 | printf ("%5lu:", (unsigned long) position); |
| 159 | printf ("%.*s", (int) 2 * depth, prefix); |
| 160 | } |
| 161 | |
| 162 | static void |
| 163 | dump_gcov_file (const char *filename) |
| 164 | { |
| 165 | unsigned tags[4]; |
| 166 | unsigned depth = 0; |
| 167 | bool is_data_type; |
| 168 | |
| 169 | if (!gcov_open (filename, 1)) |
| 170 | { |
| 171 | fprintf (stderrstderr, "%s:cannot open\n", filename); |
| 172 | return; |
| 173 | } |
| 174 | |
| 175 | /* magic */ |
| 176 | { |
| 177 | unsigned magic = gcov_read_unsigned (); |
| 178 | unsigned version; |
| 179 | int endianness = 0; |
| 180 | char m[4], v[4]; |
| 181 | |
| 182 | if ((endianness = gcov_magic (magic, GCOV_DATA_MAGIC((gcov_unsigned_t)0x67636461)))) |
| 183 | is_data_type = true; |
| 184 | else if ((endianness = gcov_magic (magic, GCOV_NOTE_MAGIC((gcov_unsigned_t)0x67636e6f)))) |
| 185 | is_data_type = false; |
| 186 | else |
| 187 | { |
| 188 | printf ("%s:not a gcov file\n", filename); |
| 189 | gcov_close (); |
| 190 | return; |
| 191 | } |
| 192 | version = gcov_read_unsigned (); |
| 193 | GCOV_UNSIGNED2STRING (v, version)((v)[0] = (char)((version) >> 24), (v)[1] = (char)((version ) >> 16), (v)[2] = (char)((version) >> 8), (v)[3] = (char)((version) >> 0)); |
| 194 | GCOV_UNSIGNED2STRING (m, magic)((m)[0] = (char)((magic) >> 24), (m)[1] = (char)((magic ) >> 16), (m)[2] = (char)((magic) >> 8), (m)[3] = (char)((magic) >> 0)); |
| 195 | |
| 196 | printf ("%s:%s:magic `%.4s':version `%.4s'%s\n", filename, |
| 197 | is_data_type ? "data" : "note", |
| 198 | m, v, endianness < 0 ? " (swapped endianness)" : ""); |
| 199 | if (version != GCOV_VERSION((gcov_unsigned_t)0x42313065)) |
| 200 | { |
| 201 | char e[4]; |
| 202 | |
| 203 | GCOV_UNSIGNED2STRING (e, GCOV_VERSION)((e)[0] = (char)((((gcov_unsigned_t)0x42313065)) >> 24) , (e)[1] = (char)((((gcov_unsigned_t)0x42313065)) >> 16 ), (e)[2] = (char)((((gcov_unsigned_t)0x42313065)) >> 8 ), (e)[3] = (char)((((gcov_unsigned_t)0x42313065)) >> 0 )); |
| 204 | printf ("%s:warning:current version is `%.4s'\n", filename, e); |
| 205 | } |
| 206 | } |
| 207 | |
| 208 | /* stamp */ |
| 209 | { |
| 210 | unsigned stamp = gcov_read_unsigned (); |
| 211 | |
| 212 | printf ("%s:stamp %lu\n", filename, (unsigned long)stamp); |
| 213 | } |
| 214 | |
| 215 | if (!is_data_type) |
| 216 | { |
| 217 | printf ("%s:cwd: %s\n", filename, gcov_read_string ()); |
| 218 | |
| 219 | /* Support for unexecuted basic blocks. */ |
| 220 | unsigned support_unexecuted_blocks = gcov_read_unsigned (); |
| 221 | if (!support_unexecuted_blocks) |
| 222 | printf ("%s: has_unexecuted_block is not supported\n", filename); |
| 223 | } |
| 224 | |
| 225 | while (1) |
| 226 | { |
| 227 | gcov_position_t base, position = gcov_position (); |
| 228 | int read_length; |
| 229 | unsigned tag, length; |
| 230 | tag_format_t const *format; |
| 231 | unsigned tag_depth; |
| 232 | int error; |
| 233 | unsigned mask; |
| 234 | |
| 235 | tag = gcov_read_unsigned (); |
| 236 | if (!tag) |
| 237 | break; |
| 238 | read_length = (int)gcov_read_unsigned (); |
| 239 | length = read_length > 0 ? read_length : 0; |
| 240 | base = gcov_position (); |
| 241 | mask = GCOV_TAG_MASK (tag)(((tag) - 1) ^ (tag)) >> 1; |
| 242 | for (tag_depth = 4; mask; mask >>= 8) |
| 243 | { |
| 244 | if ((mask & 0xff) != 0xff) |
| 245 | { |
| 246 | printf ("%s:tag `%08x' is invalid\n", filename, tag); |
| 247 | break; |
| 248 | } |
| 249 | tag_depth--; |
| 250 | } |
| 251 | for (format = tag_table; format->name; format++) |
| 252 | if (format->tag == tag) |
| 253 | goto found; |
| 254 | format = &tag_table[GCOV_TAG_IS_COUNTER (tag)(!((tag) & 0xFFFF) && ((unsigned)(((tag) - ((gcov_unsigned_t )0x01a10000)) >> 17)) < GCOV_COUNTERS) ? 2 : 1]; |
| 255 | found:; |
| 256 | if (tag) |
| 257 | { |
| 258 | if (depth && depth < tag_depth) |
| 259 | { |
| 260 | if (!GCOV_TAG_IS_SUBTAG (tags[depth - 1], tag)((((tags[depth - 1]) - 1) ^ (tags[depth - 1])) >> 8 == ( ((tag) - 1) ^ (tag)) && !(((tag) ^ (tags[depth - 1])) & ~(((tags[depth - 1]) - 1) ^ (tags[depth - 1]))))) |
| 261 | printf ("%s:tag `%08x' is incorrectly nested\n", |
| 262 | filename, tag); |
| 263 | } |
| 264 | depth = tag_depth; |
| 265 | tags[depth - 1] = tag; |
| 266 | } |
| 267 | |
| 268 | print_prefix (filename, tag_depth, position); |
| 269 | printf ("%08x:%4u:%s", tag, abs (read_length), format->name); |
| 270 | if (format->proc) |
| 271 | (*format->proc) (filename, tag, read_length, depth); |
| 272 | |
| 273 | printf ("\n"); |
| 274 | if (flag_dump_contents && format->proc) |
| 275 | { |
| 276 | unsigned long actual_length = gcov_position () - base; |
| 277 | |
| 278 | if (actual_length > length) |
| 279 | printf ("%s:record size mismatch %lu bytes overread\n", |
| 280 | filename, actual_length - length); |
| 281 | else if (length > actual_length) |
| 282 | printf ("%s:record size mismatch %lu bytes unread\n", |
| 283 | filename, length - actual_length); |
| 284 | } |
| 285 | gcov_sync (base, length); |
| 286 | if ((error = gcov_is_error ())) |
| 287 | { |
| 288 | printf (error < 0 ? "%s:counter overflow at %lu\n" : |
| 289 | "%s:read error at %lu\n", filename, |
| 290 | (long unsigned) gcov_position ()); |
| 291 | break; |
| 292 | } |
| 293 | } |
| 294 | gcov_close (); |
| 295 | } |
| 296 | |
| 297 | static void |
| 298 | tag_function (const char *filename ATTRIBUTE_UNUSED__attribute__ ((__unused__)), |
| 299 | unsigned tag ATTRIBUTE_UNUSED__attribute__ ((__unused__)), int length, |
| 300 | unsigned depth ATTRIBUTE_UNUSED__attribute__ ((__unused__))) |
| 301 | { |
| 302 | gcov_position_t pos = gcov_position (); |
| 303 | |
| 304 | if (!length) |
| 305 | printf (" placeholder"); |
| 306 | else |
| 307 | { |
| 308 | printf (" ident=%u", gcov_read_unsigned ()); |
| 309 | printf (", lineno_checksum=0x%08x", gcov_read_unsigned ()); |
| 310 | printf (", cfg_checksum=0x%08x", gcov_read_unsigned ()); |
| 311 | |
| 312 | if (gcov_position () - pos < (gcov_position_t) length) |
| 313 | { |
| 314 | const char *name; |
| 315 | |
| 316 | name = gcov_read_string (); |
| 317 | printf (", `%s'", name ? name : "NULL"); |
| 318 | unsigned artificial = gcov_read_unsigned (); |
| 319 | name = gcov_read_string (); |
| 320 | printf (" %s", name ? name : "NULL"); |
| 321 | unsigned line_start = gcov_read_unsigned (); |
| 322 | unsigned column_start = gcov_read_unsigned (); |
| 323 | unsigned line_end = gcov_read_unsigned (); |
| 324 | unsigned column_end = gcov_read_unsigned (); |
| 325 | printf (":%u:%u-%u:%u", line_start, column_start, |
| 326 | line_end, column_end); |
| 327 | if (artificial) |
| 328 | printf (", artificial"); |
| 329 | } |
| 330 | } |
| 331 | } |
| 332 | |
| 333 | static void |
| 334 | tag_blocks (const char *filename ATTRIBUTE_UNUSED__attribute__ ((__unused__)), |
| 335 | unsigned tag ATTRIBUTE_UNUSED__attribute__ ((__unused__)), int length ATTRIBUTE_UNUSED__attribute__ ((__unused__)), |
| 336 | unsigned depth ATTRIBUTE_UNUSED__attribute__ ((__unused__))) |
| 337 | { |
| 338 | printf (" %u blocks", gcov_read_unsigned ()); |
| 339 | } |
| 340 | |
| 341 | static void |
| 342 | tag_arcs (const char *filename ATTRIBUTE_UNUSED__attribute__ ((__unused__)), |
| 343 | unsigned tag ATTRIBUTE_UNUSED__attribute__ ((__unused__)), int length ATTRIBUTE_UNUSED__attribute__ ((__unused__)), |
| 344 | unsigned depth) |
| 345 | { |
| 346 | unsigned n_arcs = GCOV_TAG_ARCS_NUM (length)(((length) - 1) / 2); |
| 347 | |
| 348 | printf (" %u arcs", n_arcs); |
| 349 | if (flag_dump_contents) |
| 350 | { |
| 351 | unsigned ix; |
| 352 | unsigned blockno = gcov_read_unsigned (); |
| 353 | |
| 354 | for (ix = 0; ix != n_arcs; ix++) |
| 355 | { |
| 356 | unsigned dst, flags; |
| 357 | |
| 358 | if (!(ix & 3)) |
| 359 | { |
| 360 | printf ("\n"); |
| 361 | print_prefix (filename, depth, gcov_position ()); |
| 362 | printf (VALUE_PADDING_PREFIX" " "block %u:", blockno); |
| 363 | } |
| 364 | dst = gcov_read_unsigned (); |
| 365 | flags = gcov_read_unsigned (); |
| 366 | printf (" %u:%04x", dst, flags); |
| 367 | if (flags) |
| 368 | { |
| 369 | char c = '('; |
| 370 | |
| 371 | if (flags & GCOV_ARC_ON_TREE(1 << 0)) |
| 372 | printf ("%ctree", c), c = ','; |
| 373 | if (flags & GCOV_ARC_FAKE(1 << 1)) |
| 374 | printf ("%cfake", c), c = ','; |
| 375 | if (flags & GCOV_ARC_FALLTHROUGH(1 << 2)) |
| 376 | printf ("%cfall", c), c = ','; |
Although the value stored to 'c' is used in the enclosing expression, the value is never actually read from 'c' | |
| 377 | printf (")"); |
| 378 | } |
| 379 | } |
| 380 | } |
| 381 | } |
| 382 | |
| 383 | static void |
| 384 | tag_lines (const char *filename ATTRIBUTE_UNUSED__attribute__ ((__unused__)), |
| 385 | unsigned tag ATTRIBUTE_UNUSED__attribute__ ((__unused__)), int length ATTRIBUTE_UNUSED__attribute__ ((__unused__)), |
| 386 | unsigned depth) |
| 387 | { |
| 388 | if (flag_dump_contents) |
| 389 | { |
| 390 | unsigned blockno = gcov_read_unsigned (); |
| 391 | char const *sep = NULL__null; |
| 392 | |
| 393 | while (1) |
| 394 | { |
| 395 | gcov_position_t position = gcov_position (); |
| 396 | const char *source = NULL__null; |
| 397 | unsigned lineno = gcov_read_unsigned (); |
| 398 | |
| 399 | if (!lineno) |
| 400 | { |
| 401 | source = gcov_read_string (); |
| 402 | if (!source) |
| 403 | break; |
| 404 | sep = NULL__null; |
| 405 | } |
| 406 | |
| 407 | if (!sep) |
| 408 | { |
| 409 | printf ("\n"); |
| 410 | print_prefix (filename, depth, position); |
| 411 | printf (VALUE_PADDING_PREFIX" " "block %u:", blockno); |
| 412 | sep = ""; |
| 413 | } |
| 414 | if (lineno) |
| 415 | { |
| 416 | printf ("%s%u", sep, lineno); |
| 417 | sep = ", "; |
| 418 | } |
| 419 | else |
| 420 | { |
| 421 | printf ("%s`%s'", sep, source); |
| 422 | sep = ":"; |
| 423 | } |
| 424 | } |
| 425 | } |
| 426 | } |
| 427 | |
| 428 | static void |
| 429 | tag_counters (const char *filename ATTRIBUTE_UNUSED__attribute__ ((__unused__)), |
| 430 | unsigned tag ATTRIBUTE_UNUSED__attribute__ ((__unused__)), int length ATTRIBUTE_UNUSED__attribute__ ((__unused__)), |
| 431 | unsigned depth) |
| 432 | { |
| 433 | #define DEF_GCOV_COUNTER(COUNTER, NAME, MERGE_FN) NAME, |
| 434 | static const char *const counter_names[] = { |
| 435 | #include "gcov-counter.def" |
| 436 | }; |
| 437 | #undef DEF_GCOV_COUNTER |
| 438 | int n_counts = GCOV_TAG_COUNTER_NUM (length)((length) / 2); |
| 439 | bool has_zeros = n_counts < 0; |
| 440 | n_counts = abs (n_counts); |
| 441 | |
| 442 | printf (" %s %u counts%s", |
| 443 | counter_names[GCOV_COUNTER_FOR_TAG (tag)((unsigned)(((tag) - ((gcov_unsigned_t)0x01a10000)) >> 17 ))], n_counts, |
| 444 | has_zeros ? " (all zero)" : ""); |
| 445 | if (flag_dump_contents) |
| 446 | { |
| 447 | for (int ix = 0; ix != n_counts; ix++) |
| 448 | { |
| 449 | gcov_type count; |
| 450 | |
| 451 | if (flag_dump_raw) |
| 452 | { |
| 453 | if (ix == 0) |
| 454 | printf (": "); |
| 455 | } |
| 456 | else if (!(ix & 7)) |
| 457 | { |
| 458 | printf ("\n"); |
| 459 | print_prefix (filename, depth, gcov_position ()); |
| 460 | printf (VALUE_PADDING_PREFIX" " VALUE_PREFIX"%2d: ", ix); |
| 461 | } |
| 462 | |
| 463 | count = has_zeros ? 0 : gcov_read_counter (); |
| 464 | printf ("%" PRId64"l" "d" " ", count); |
| 465 | } |
| 466 | } |
| 467 | } |
| 468 | |
| 469 | static void |
| 470 | tag_summary (const char *filename ATTRIBUTE_UNUSED__attribute__ ((__unused__)), |
| 471 | unsigned tag ATTRIBUTE_UNUSED__attribute__ ((__unused__)), int length ATTRIBUTE_UNUSED__attribute__ ((__unused__)), |
| 472 | unsigned depth ATTRIBUTE_UNUSED__attribute__ ((__unused__))) |
| 473 | { |
| 474 | gcov_summary summary; |
| 475 | gcov_read_summary (&summary); |
| 476 | printf (" runs=%d, sum_max=%" PRId64"l" "d", |
| 477 | summary.runs, summary.sum_max); |
| 478 | } |