193885Sphantom/* File format for coverage information 293885Sphantom Copyright (C) 1996, 1997, 1998, 2000, 2002, 393885Sphantom 2003, 2004, 2005 Free Software Foundation, Inc. 493885Sphantom Contributed by Bob Manson <manson@cygnus.com>. 593885Sphantom Completely remangled by Nathan Sidwell <nathan@codesourcery.com>. 693885Sphantom 793885SphantomThis file is part of GCC. 893885Sphantom 993885SphantomGCC is free software; you can redistribute it and/or modify it under 1093885Sphantomthe terms of the GNU General Public License as published by the Free 1193885SphantomSoftware Foundation; either version 2, or (at your option) any later 1293885Sphantomversion. 1393885Sphantom 1493885SphantomGCC is distributed in the hope that it will be useful, but WITHOUT ANY 1593885SphantomWARRANTY; without even the implied warranty of MERCHANTABILITY or 1693885SphantomFITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 1793885Sphantomfor more details. 1893885Sphantom 1993885SphantomYou should have received a copy of the GNU General Public License 2093885Sphantomalong with GCC; see the file COPYING. If not, write to the Free 2193885SphantomSoftware Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 2293885Sphantom02110-1301, USA. */ 2393885Sphantom 2493885Sphantom/* As a special exception, if you link this library with other files, 2593885Sphantom some of which are compiled with GCC, to produce an executable, 2693885Sphantom this library does not by itself cause the resulting executable 2793885Sphantom to be covered by the GNU General Public License. 2893885Sphantom This exception does not however invalidate any other reasons why 2993885Sphantom the executable file might be covered by the GNU General Public License. */ 3093885Sphantom 3193885Sphantom/* Coverage information is held in two files. A notes file, which is 3293885Sphantom generated by the compiler, and a data file, which is generated by 3393885Sphantom the program under test. Both files use a similar structure. We do 3493885Sphantom not attempt to make these files backwards compatible with previous 3593885Sphantom versions, as you only need coverage information when developing a 3693885Sphantom program. We do hold version information, so that mismatches can be 37 detected, and we use a format that allows tools to skip information 38 they do not understand or are not interested in. 39 40 Numbers are recorded in the 32 bit unsigned binary form of the 41 endianness of the machine generating the file. 64 bit numbers are 42 stored as two 32 bit numbers, the low part first. Strings are 43 padded with 1 to 4 NUL bytes, to bring the length up to a multiple 44 of 4. The number of 4 bytes is stored, followed by the padded 45 string. Zero length and NULL strings are simply stored as a length 46 of zero (they have no trailing NUL or padding). 47 48 int32: byte3 byte2 byte1 byte0 | byte0 byte1 byte2 byte3 49 int64: int32:low int32:high 50 string: int32:0 | int32:length char* char:0 padding 51 padding: | char:0 | char:0 char:0 | char:0 char:0 char:0 52 item: int32 | int64 | string 53 54 The basic format of the files is 55 56 file : int32:magic int32:version int32:stamp record* 57 58 The magic ident is different for the notes and the data files. The 59 magic ident is used to determine the endianness of the file, when 60 reading. The version is the same for both files and is derived 61 from gcc's version number. The stamp value is used to synchronize 62 note and data files and to synchronize merging within a data 63 file. It need not be an absolute time stamp, merely a ticker that 64 increments fast enough and cycles slow enough to distinguish 65 different compile/run/compile cycles. 66 67 Although the ident and version are formally 32 bit numbers, they 68 are derived from 4 character ASCII strings. The version number 69 consists of the single character major version number, a two 70 character minor version number (leading zero for versions less than 71 10), and a single character indicating the status of the release. 72 That will be 'e' experimental, 'p' prerelease and 'r' for release. 73 Because, by good fortune, these are in alphabetical order, string 74 collating can be used to compare version strings. Be aware that 75 the 'e' designation will (naturally) be unstable and might be 76 incompatible with itself. For gcc 3.4 experimental, it would be 77 '304e' (0x33303465). When the major version reaches 10, the 78 letters A-Z will be used. Assuming minor increments releases every 79 6 months, we have to make a major increment every 50 years. 80 Assuming major increments releases every 5 years, we're ok for the 81 next 155 years -- good enough for me. 82 83 A record has a tag, length and variable amount of data. 84 85 record: header data 86 header: int32:tag int32:length 87 data: item* 88 89 Records are not nested, but there is a record hierarchy. Tag 90 numbers reflect this hierarchy. Tags are unique across note and 91 data files. Some record types have a varying amount of data. The 92 LENGTH is the number of 4bytes that follow and is usually used to 93 determine how much data. The tag value is split into 4 8-bit 94 fields, one for each of four possible levels. The most significant 95 is allocated first. Unused levels are zero. Active levels are 96 odd-valued, so that the LSB of the level is one. A sub-level 97 incorporates the values of its superlevels. This formatting allows 98 you to determine the tag hierarchy, without understanding the tags 99 themselves, and is similar to the standard section numbering used 100 in technical documents. Level values [1..3f] are used for common 101 tags, values [41..9f] for the notes file and [a1..ff] for the data 102 file. 103 104 The basic block graph file contains the following records 105 note: unit function-graph* 106 unit: header int32:checksum string:source 107 function-graph: announce_function basic_blocks {arcs | lines}* 108 announce_function: header int32:ident int32:checksum 109 string:name string:source int32:lineno 110 basic_block: header int32:flags* 111 arcs: header int32:block_no arc* 112 arc: int32:dest_block int32:flags 113 lines: header int32:block_no line* 114 int32:0 string:NULL 115 line: int32:line_no | int32:0 string:filename 116 117 The BASIC_BLOCK record holds per-bb flags. The number of blocks 118 can be inferred from its data length. There is one ARCS record per 119 basic block. The number of arcs from a bb is implicit from the 120 data length. It enumerates the destination bb and per-arc flags. 121 There is one LINES record per basic block, it enumerates the source 122 lines which belong to that basic block. Source file names are 123 introduced by a line number of 0, following lines are from the new 124 source file. The initial source file for the function is NULL, but 125 the current source file should be remembered from one LINES record 126 to the next. The end of a block is indicated by an empty filename 127 - this does not reset the current source file. Note there is no 128 ordering of the ARCS and LINES records: they may be in any order, 129 interleaved in any manner. The current filename follows the order 130 the LINES records are stored in the file, *not* the ordering of the 131 blocks they are for. 132 133 The data file contains the following records. 134 data: {unit function-data* summary:object summary:program*}* 135 unit: header int32:checksum 136 function-data: announce_function arc_counts 137 announce_function: header int32:ident int32:checksum 138 arc_counts: header int64:count* 139 summary: int32:checksum {count-summary}GCOV_COUNTERS 140 count-summary: int32:num int32:runs int64:sum 141 int64:max int64:sum_max 142 143 The ANNOUNCE_FUNCTION record is the same as that in the note file, 144 but without the source location. The ARC_COUNTS gives the counter 145 values for those arcs that are instrumented. The SUMMARY records 146 give information about the whole object file and about the whole 147 program. The checksum is used for whole program summaries, and 148 disambiguates different programs which include the same 149 instrumented object file. There may be several program summaries, 150 each with a unique checksum. The object summary's checksum is zero. 151 Note that the data file might contain information from several runs 152 concatenated, or the data might be merged. 153 154 This file is included by both the compiler, gcov tools and the 155 runtime support library libgcov. IN_LIBGCOV and IN_GCOV are used to 156 distinguish which case is which. If IN_LIBGCOV is nonzero, 157 libgcov is being built. If IN_GCOV is nonzero, the gcov tools are 158 being built. Otherwise the compiler is being built. IN_GCOV may be 159 positive or negative. If positive, we are compiling a tool that 160 requires additional functions (see the code for knowledge of what 161 those functions are). */ 162 163#ifndef GCC_GCOV_IO_H 164#define GCC_GCOV_IO_H 165 166#if IN_LIBGCOV 167/* About the target */ 168 169#if BITS_PER_UNIT == 8 170typedef unsigned gcov_unsigned_t __attribute__ ((mode (SI))); 171typedef unsigned gcov_position_t __attribute__ ((mode (SI))); 172#if LONG_LONG_TYPE_SIZE > 32 173typedef signed gcov_type __attribute__ ((mode (DI))); 174#else 175typedef signed gcov_type __attribute__ ((mode (SI))); 176#endif 177#else 178#if BITS_PER_UNIT == 16 179typedef unsigned gcov_unsigned_t __attribute__ ((mode (HI))); 180typedef unsigned gcov_position_t __attribute__ ((mode (HI))); 181#if LONG_LONG_TYPE_SIZE > 32 182typedef signed gcov_type __attribute__ ((mode (SI))); 183#else 184typedef signed gcov_type __attribute__ ((mode (HI))); 185#endif 186#else 187typedef unsigned gcov_unsigned_t __attribute__ ((mode (QI))); 188typedef unsigned gcov_position_t __attribute__ ((mode (QI))); 189#if LONG_LONG_TYPE_SIZE > 32 190typedef signed gcov_type __attribute__ ((mode (HI))); 191#else 192typedef signed gcov_type __attribute__ ((mode (QI))); 193#endif 194#endif 195#endif 196 197 198#if defined (TARGET_POSIX_IO) 199#define GCOV_LOCKED 1 200#else 201#define GCOV_LOCKED 0 202#endif 203 204#else /* !IN_LIBGCOV */ 205/* About the host */ 206 207typedef unsigned gcov_unsigned_t; 208typedef unsigned gcov_position_t; 209/* gcov_type is typedef'd elsewhere for the compiler */ 210#if IN_GCOV 211#define GCOV_LINKAGE static 212typedef HOST_WIDEST_INT gcov_type; 213#if IN_GCOV > 0 214#include <sys/types.h> 215#endif 216#else /*!IN_GCOV */ 217#define GCOV_TYPE_SIZE (LONG_LONG_TYPE_SIZE > 32 ? 64 : 32) 218#endif 219 220#if defined (HOST_HAS_F_SETLKW) 221#define GCOV_LOCKED 1 222#else 223#define GCOV_LOCKED 0 224#endif 225 226#endif /* !IN_LIBGCOV */ 227 228/* In gcov we want function linkage to be static. In the compiler we want 229 it extern, so that they can be accessed from elsewhere. In libgcov we 230 need these functions to be extern, so prefix them with __gcov. In 231 libgcov they must also be hidden so that the instance in the executable 232 is not also used in a DSO. */ 233#if IN_LIBGCOV 234 235#include "tconfig.h" 236 237#define gcov_var __gcov_var 238#define gcov_open __gcov_open 239#define gcov_close __gcov_close 240#define gcov_write_tag_length __gcov_write_tag_length 241#define gcov_position __gcov_position 242#define gcov_seek __gcov_seek 243#define gcov_rewrite __gcov_rewrite 244#define gcov_is_error __gcov_is_error 245#define gcov_write_unsigned __gcov_write_unsigned 246#define gcov_write_counter __gcov_write_counter 247#define gcov_write_summary __gcov_write_summary 248#define gcov_read_unsigned __gcov_read_unsigned 249#define gcov_read_counter __gcov_read_counter 250#define gcov_read_summary __gcov_read_summary 251 252/* Poison these, so they don't accidentally slip in. */ 253#pragma GCC poison gcov_write_string gcov_write_tag gcov_write_length 254#pragma GCC poison gcov_read_string gcov_sync gcov_time gcov_magic 255 256#ifdef HAVE_GAS_HIDDEN 257#define ATTRIBUTE_HIDDEN __attribute__ ((__visibility__ ("hidden"))) 258#else 259#define ATTRIBUTE_HIDDEN 260#endif 261 262#else 263 264#define ATTRIBUTE_HIDDEN 265 266#endif 267 268#ifndef GCOV_LINKAGE 269#define GCOV_LINKAGE extern 270#endif 271 272/* File suffixes. */ 273#define GCOV_DATA_SUFFIX ".gcda" 274#define GCOV_NOTE_SUFFIX ".gcno" 275 276/* File magic. Must not be palindromes. */ 277#define GCOV_DATA_MAGIC ((gcov_unsigned_t)0x67636461) /* "gcda" */ 278#define GCOV_NOTE_MAGIC ((gcov_unsigned_t)0x67636e6f) /* "gcno" */ 279 280/* gcov-iov.h is automatically generated by the makefile from 281 version.c, it looks like 282 #define GCOV_VERSION ((gcov_unsigned_t)0x89abcdef) 283*/ 284#include "gcov-iov.h" 285 286/* Convert a magic or version number to a 4 character string. */ 287#define GCOV_UNSIGNED2STRING(ARRAY,VALUE) \ 288 ((ARRAY)[0] = (char)((VALUE) >> 24), \ 289 (ARRAY)[1] = (char)((VALUE) >> 16), \ 290 (ARRAY)[2] = (char)((VALUE) >> 8), \ 291 (ARRAY)[3] = (char)((VALUE) >> 0)) 292 293/* The record tags. Values [1..3f] are for tags which may be in either 294 file. Values [41..9f] for those in the note file and [a1..ff] for 295 the data file. The tag value zero is used as an explicit end of 296 file marker -- it is not required to be present. */ 297 298#define GCOV_TAG_FUNCTION ((gcov_unsigned_t)0x01000000) 299#define GCOV_TAG_FUNCTION_LENGTH (2) 300#define GCOV_TAG_BLOCKS ((gcov_unsigned_t)0x01410000) 301#define GCOV_TAG_BLOCKS_LENGTH(NUM) (NUM) 302#define GCOV_TAG_BLOCKS_NUM(LENGTH) (LENGTH) 303#define GCOV_TAG_ARCS ((gcov_unsigned_t)0x01430000) 304#define GCOV_TAG_ARCS_LENGTH(NUM) (1 + (NUM) * 2) 305#define GCOV_TAG_ARCS_NUM(LENGTH) (((LENGTH) - 1) / 2) 306#define GCOV_TAG_LINES ((gcov_unsigned_t)0x01450000) 307#define GCOV_TAG_COUNTER_BASE ((gcov_unsigned_t)0x01a10000) 308#define GCOV_TAG_COUNTER_LENGTH(NUM) ((NUM) * 2) 309#define GCOV_TAG_COUNTER_NUM(LENGTH) ((LENGTH) / 2) 310#define GCOV_TAG_OBJECT_SUMMARY ((gcov_unsigned_t)0xa1000000) 311#define GCOV_TAG_PROGRAM_SUMMARY ((gcov_unsigned_t)0xa3000000) 312#define GCOV_TAG_SUMMARY_LENGTH \ 313 (1 + GCOV_COUNTERS_SUMMABLE * (2 + 3 * 2)) 314 315/* Counters that are collected. */ 316#define GCOV_COUNTER_ARCS 0 /* Arc transitions. */ 317#define GCOV_COUNTERS_SUMMABLE 1 /* Counters which can be 318 summaried. */ 319#define GCOV_FIRST_VALUE_COUNTER 1 /* The first of counters used for value 320 profiling. They must form a consecutive 321 interval and their order must match 322 the order of HIST_TYPEs in 323 value-prof.h. */ 324#define GCOV_COUNTER_V_INTERVAL 1 /* Histogram of value inside an interval. */ 325#define GCOV_COUNTER_V_POW2 2 /* Histogram of exact power2 logarithm 326 of a value. */ 327#define GCOV_COUNTER_V_SINGLE 3 /* The most common value of expression. */ 328#define GCOV_COUNTER_V_DELTA 4 /* The most common difference between 329 consecutive values of expression. */ 330#define GCOV_LAST_VALUE_COUNTER 4 /* The last of counters used for value 331 profiling. */ 332#define GCOV_COUNTERS 5 333 334/* Number of counters used for value profiling. */ 335#define GCOV_N_VALUE_COUNTERS \ 336 (GCOV_LAST_VALUE_COUNTER - GCOV_FIRST_VALUE_COUNTER + 1) 337 338 /* A list of human readable names of the counters */ 339#define GCOV_COUNTER_NAMES {"arcs", "interval", "pow2", "single", "delta"} 340 341 /* Names of merge functions for counters. */ 342#define GCOV_MERGE_FUNCTIONS {"__gcov_merge_add", \ 343 "__gcov_merge_add", \ 344 "__gcov_merge_add", \ 345 "__gcov_merge_single", \ 346 "__gcov_merge_delta"} 347 348/* Convert a counter index to a tag. */ 349#define GCOV_TAG_FOR_COUNTER(COUNT) \ 350 (GCOV_TAG_COUNTER_BASE + ((gcov_unsigned_t)(COUNT) << 17)) 351/* Convert a tag to a counter. */ 352#define GCOV_COUNTER_FOR_TAG(TAG) \ 353 ((unsigned)(((TAG) - GCOV_TAG_COUNTER_BASE) >> 17)) 354/* Check whether a tag is a counter tag. */ 355#define GCOV_TAG_IS_COUNTER(TAG) \ 356 (!((TAG) & 0xFFFF) && GCOV_COUNTER_FOR_TAG (TAG) < GCOV_COUNTERS) 357 358/* The tag level mask has 1's in the position of the inner levels, & 359 the lsb of the current level, and zero on the current and outer 360 levels. */ 361#define GCOV_TAG_MASK(TAG) (((TAG) - 1) ^ (TAG)) 362 363/* Return nonzero if SUB is an immediate subtag of TAG. */ 364#define GCOV_TAG_IS_SUBTAG(TAG,SUB) \ 365 (GCOV_TAG_MASK (TAG) >> 8 == GCOV_TAG_MASK (SUB) \ 366 && !(((SUB) ^ (TAG)) & ~GCOV_TAG_MASK(TAG))) 367 368/* Return nonzero if SUB is at a sublevel to TAG. */ 369#define GCOV_TAG_IS_SUBLEVEL(TAG,SUB) \ 370 (GCOV_TAG_MASK (TAG) > GCOV_TAG_MASK (SUB)) 371 372/* Basic block flags. */ 373#define GCOV_BLOCK_UNEXPECTED (1 << 1) 374 375/* Arc flags. */ 376#define GCOV_ARC_ON_TREE (1 << 0) 377#define GCOV_ARC_FAKE (1 << 1) 378#define GCOV_ARC_FALLTHROUGH (1 << 2) 379 380/* Structured records. */ 381 382/* Cumulative counter data. */ 383struct gcov_ctr_summary 384{ 385 gcov_unsigned_t num; /* number of counters. */ 386 gcov_unsigned_t runs; /* number of program runs */ 387 gcov_type sum_all; /* sum of all counters accumulated. */ 388 gcov_type run_max; /* maximum value on a single run. */ 389 gcov_type sum_max; /* sum of individual run max values. */ 390}; 391 392/* Object & program summary record. */ 393struct gcov_summary 394{ 395 gcov_unsigned_t checksum; /* checksum of program */ 396 struct gcov_ctr_summary ctrs[GCOV_COUNTERS_SUMMABLE]; 397}; 398 399/* Structures embedded in coveraged program. The structures generated 400 by write_profile must match these. */ 401 402#if IN_LIBGCOV 403/* Information about a single function. This uses the trailing array 404 idiom. The number of counters is determined from the counter_mask 405 in gcov_info. We hold an array of function info, so have to 406 explicitly calculate the correct array stride. */ 407struct gcov_fn_info 408{ 409 gcov_unsigned_t ident; /* unique ident of function */ 410 gcov_unsigned_t checksum; /* function checksum */ 411 unsigned n_ctrs[0]; /* instrumented counters */ 412}; 413 414/* Type of function used to merge counters. */ 415typedef void (*gcov_merge_fn) (gcov_type *, gcov_unsigned_t); 416 417/* Information about counters. */ 418struct gcov_ctr_info 419{ 420 gcov_unsigned_t num; /* number of counters. */ 421 gcov_type *values; /* their values. */ 422 gcov_merge_fn merge; /* The function used to merge them. */ 423}; 424 425/* Information about a single object file. */ 426struct gcov_info 427{ 428 gcov_unsigned_t version; /* expected version number */ 429 struct gcov_info *next; /* link to next, used by libgcov */ 430 431 gcov_unsigned_t stamp; /* uniquifying time stamp */ 432 const char *filename; /* output file name */ 433 434 unsigned n_functions; /* number of functions */ 435 const struct gcov_fn_info *functions; /* table of functions */ 436 437 unsigned ctr_mask; /* mask of counters instrumented. */ 438 struct gcov_ctr_info counts[0]; /* count data. The number of bits 439 set in the ctr_mask field 440 determines how big this array 441 is. */ 442}; 443 444/* Register a new object file module. */ 445extern void __gcov_init (struct gcov_info *) ATTRIBUTE_HIDDEN; 446 447/* Called before fork, to avoid double counting. */ 448extern void __gcov_flush (void) ATTRIBUTE_HIDDEN; 449 450/* The merge function that just sums the counters. */ 451extern void __gcov_merge_add (gcov_type *, unsigned) ATTRIBUTE_HIDDEN; 452 453/* The merge function to choose the most common value. */ 454extern void __gcov_merge_single (gcov_type *, unsigned) ATTRIBUTE_HIDDEN; 455 456/* The merge function to choose the most common difference between 457 consecutive values. */ 458extern void __gcov_merge_delta (gcov_type *, unsigned) ATTRIBUTE_HIDDEN; 459 460/* The profiler functions. */ 461extern void __gcov_interval_profiler (gcov_type *, gcov_type, int, unsigned); 462extern void __gcov_pow2_profiler (gcov_type *, gcov_type); 463extern void __gcov_one_value_profiler (gcov_type *, gcov_type); 464 465#ifndef inhibit_libc 466/* The wrappers around some library functions.. */ 467extern pid_t __gcov_fork (void); 468extern int __gcov_execl (const char *, const char *, ...) ATTRIBUTE_HIDDEN; 469extern int __gcov_execlp (const char *, const char *, ...) ATTRIBUTE_HIDDEN; 470extern int __gcov_execle (const char *, const char *, ...) ATTRIBUTE_HIDDEN; 471extern int __gcov_execv (const char *, char *const []) ATTRIBUTE_HIDDEN; 472extern int __gcov_execvp (const char *, char *const []) ATTRIBUTE_HIDDEN; 473extern int __gcov_execve (const char *, char *const [], char *const []) 474 ATTRIBUTE_HIDDEN; 475#endif 476 477#endif /* IN_LIBGCOV */ 478 479#if IN_LIBGCOV >= 0 480 481/* Optimum number of gcov_unsigned_t's read from or written to disk. */ 482#define GCOV_BLOCK_SIZE (1 << 10) 483 484GCOV_LINKAGE struct gcov_var 485{ 486 FILE *file; 487 gcov_position_t start; /* Position of first byte of block */ 488 unsigned offset; /* Read/write position within the block. */ 489 unsigned length; /* Read limit in the block. */ 490 unsigned overread; /* Number of words overread. */ 491 int error; /* < 0 overflow, > 0 disk error. */ 492 int mode; /* < 0 writing, > 0 reading */ 493#if IN_LIBGCOV 494 /* Holds one block plus 4 bytes, thus all coverage reads & writes 495 fit within this buffer and we always can transfer GCOV_BLOCK_SIZE 496 to and from the disk. libgcov never backtracks and only writes 4 497 or 8 byte objects. */ 498 gcov_unsigned_t buffer[GCOV_BLOCK_SIZE + 1]; 499#else 500 int endian; /* Swap endianness. */ 501 /* Holds a variable length block, as the compiler can write 502 strings and needs to backtrack. */ 503 size_t alloc; 504 gcov_unsigned_t *buffer; 505#endif 506} gcov_var ATTRIBUTE_HIDDEN; 507 508/* Functions for reading and writing gcov files. In libgcov you can 509 open the file for reading then writing. Elsewhere you can open the 510 file either for reading or for writing. When reading a file you may 511 use the gcov_read_* functions, gcov_sync, gcov_position, & 512 gcov_error. When writing a file you may use the gcov_write 513 functions, gcov_seek & gcov_error. When a file is to be rewritten 514 you use the functions for reading, then gcov_rewrite then the 515 functions for writing. Your file may become corrupted if you break 516 these invariants. */ 517#if IN_LIBGCOV 518GCOV_LINKAGE int gcov_open (const char */*name*/) ATTRIBUTE_HIDDEN; 519#else 520GCOV_LINKAGE int gcov_open (const char */*name*/, int /*direction*/); 521GCOV_LINKAGE int gcov_magic (gcov_unsigned_t, gcov_unsigned_t); 522#endif 523GCOV_LINKAGE int gcov_close (void) ATTRIBUTE_HIDDEN; 524 525/* Available everywhere. */ 526static gcov_position_t gcov_position (void); 527static int gcov_is_error (void); 528 529GCOV_LINKAGE gcov_unsigned_t gcov_read_unsigned (void) ATTRIBUTE_HIDDEN; 530GCOV_LINKAGE gcov_type gcov_read_counter (void) ATTRIBUTE_HIDDEN; 531GCOV_LINKAGE void gcov_read_summary (struct gcov_summary *) ATTRIBUTE_HIDDEN; 532 533#if IN_LIBGCOV 534/* Available only in libgcov */ 535GCOV_LINKAGE void gcov_write_counter (gcov_type) ATTRIBUTE_HIDDEN; 536GCOV_LINKAGE void gcov_write_tag_length (gcov_unsigned_t, gcov_unsigned_t) 537 ATTRIBUTE_HIDDEN; 538GCOV_LINKAGE void gcov_write_summary (gcov_unsigned_t /*tag*/, 539 const struct gcov_summary *) 540 ATTRIBUTE_HIDDEN; 541static void gcov_rewrite (void); 542GCOV_LINKAGE void gcov_seek (gcov_position_t /*position*/) ATTRIBUTE_HIDDEN; 543#else 544/* Available outside libgcov */ 545GCOV_LINKAGE const char *gcov_read_string (void); 546GCOV_LINKAGE void gcov_sync (gcov_position_t /*base*/, 547 gcov_unsigned_t /*length */); 548#endif 549 550#if !IN_GCOV 551/* Available outside gcov */ 552GCOV_LINKAGE void gcov_write_unsigned (gcov_unsigned_t) ATTRIBUTE_HIDDEN; 553#endif 554 555#if !IN_GCOV && !IN_LIBGCOV 556/* Available only in compiler */ 557GCOV_LINKAGE void gcov_write_string (const char *); 558GCOV_LINKAGE gcov_position_t gcov_write_tag (gcov_unsigned_t); 559GCOV_LINKAGE void gcov_write_length (gcov_position_t /*position*/); 560#endif 561 562#if IN_GCOV > 0 563/* Available in gcov */ 564GCOV_LINKAGE time_t gcov_time (void); 565#endif 566 567/* Save the current position in the gcov file. */ 568 569static inline gcov_position_t 570gcov_position (void) 571{ 572 gcc_assert (gcov_var.mode > 0); 573 return gcov_var.start + gcov_var.offset; 574} 575 576/* Return nonzero if the error flag is set. */ 577 578static inline int 579gcov_is_error (void) 580{ 581 return gcov_var.file ? gcov_var.error : 1; 582} 583 584#if IN_LIBGCOV 585/* Move to beginning of file and initialize for writing. */ 586 587static inline void 588gcov_rewrite (void) 589{ 590 gcc_assert (gcov_var.mode > 0); 591 gcov_var.mode = -1; 592 gcov_var.start = 0; 593 gcov_var.offset = 0; 594 fseek (gcov_var.file, 0L, SEEK_SET); 595} 596#endif 597 598#endif /* IN_LIBGCOV >= 0 */ 599 600#endif /* GCC_GCOV_IO_H */ 601