/* File format for coverage information
- Copyright (C) 1996, 1997, 1998, 2000, 2002,
- 2003 Free Software Foundation, Inc.
+ Copyright (C) 1996-2016 Free Software Foundation, Inc.
Contributed by Bob Manson <manson@cygnus.com>.
Completely remangled by Nathan Sidwell <nathan@codesourcery.com>.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
-Software Foundation; either version 2, or (at your option) any later
+Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
-You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA. */
-
-/* As a special exception, if you link this library with other files,
- some of which are compiled with GCC, to produce an executable,
- this library does not by itself cause the resulting executable
- to be covered by the GNU General Public License.
- This exception does not however invalidate any other reasons why
- the executable file might be covered by the GNU General Public License. */
-
-/* Coverage information is held in two files. A basic block graph
- file, which is generated by the compiler, and a counter file, which
- is generated by the program under test. Both files use a similar
- structure. We do not attempt to make these files backwards
- compatible with previous versions, as you only need coverage
- information when developing a program. We do hold version
- information, so that mismatches can be detected, and we use a
- format that allows tools to skip information they do not understand
- or are not interested in.
-
- Numbers are recorded in big endian unsigned binary form. Either in
- 32 or 64 bits. Strings are stored with a length count and NUL
- terminator, and 0 to 3 bytes of zero padding up to the next 4 byte
- boundary. Zero length and NULL strings are simply stored as a
- length of zero (they have no trailing NUL or padding).
-
- int32: byte3 byte2 byte1 byte0
- int64: byte7 byte6 byte5 byte4 byte3 byte2 byte1 byte0
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
+
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+<http://www.gnu.org/licenses/>. */
+
+
+/* Coverage information is held in two files. A notes file, which is
+ generated by the compiler, and a data file, which is generated by
+ the program under test. Both files use a similar structure. We do
+ not attempt to make these files backwards compatible with previous
+ versions, as you only need coverage information when developing a
+ program. We do hold version information, so that mismatches can be
+ detected, and we use a format that allows tools to skip information
+ they do not understand or are not interested in.
+
+ Numbers are recorded in the 32 bit unsigned binary form of the
+ endianness of the machine generating the file. 64 bit numbers are
+ stored as two 32 bit numbers, the low part first. Strings are
+ padded with 1 to 4 NUL bytes, to bring the length up to a multiple
+ of 4. The number of 4 bytes is stored, followed by the padded
+ string. Zero length and NULL strings are simply stored as a length
+ of zero (they have no trailing NUL or padding).
+
+ int32: byte3 byte2 byte1 byte0 | byte0 byte1 byte2 byte3
+ int64: int32:low int32:high
string: int32:0 | int32:length char* char:0 padding
padding: | char:0 | char:0 char:0 | char:0 char:0 char:0
item: int32 | int64 | string
The basic format of the files is
- file : int32:magic int32:version record*
-
- The magic ident is different for the bbg and the counter files.
- The version is the same for both files and is derived from gcc's
- version number. Although the ident and version are formally 32 bit
- numbers, they are derived from 4 character ASCII strings. The
- version number consists of the single character major version
- number, a two character minor version number (leading zero for
- versions less than 10), and a single character indicating the
- status of the release. That will be 'e' experimental, 'p'
- prerelease and 'r' for release. Because, by good fortune, these are
- in alphabetical order, string collating can be used to compare
- version strings, and because numbers are stored big endian, numeric
- comparison can be used when it is read as a 32 bit value. Be aware
- that the 'e' designation will (naturally) be unstable and might be
+ file : int32:magic int32:version int32:stamp record*
+
+ The magic ident is different for the notes and the data files. The
+ magic ident is used to determine the endianness of the file, when
+ reading. The version is the same for both files and is derived
+ from gcc's version number. The stamp value is used to synchronize
+ note and data files and to synchronize merging within a data
+ file. It need not be an absolute time stamp, merely a ticker that
+ increments fast enough and cycles slow enough to distinguish
+ different compile/run/compile cycles.
+
+ Although the ident and version are formally 32 bit numbers, they
+ are derived from 4 character ASCII strings. The version number
+ consists of the single character major version number, a two
+ character minor version number (leading zero for versions less than
+ 10), and a single character indicating the status of the release.
+ That will be 'e' experimental, 'p' prerelease and 'r' for release.
+ Because, by good fortune, these are in alphabetical order, string
+ collating can be used to compare version strings. Be aware that
+ the 'e' designation will (naturally) be unstable and might be
incompatible with itself. For gcc 3.4 experimental, it would be
- '304e' (0x33303465). When the major version reaches 10, the letters
- A-Z will be used. Assuming minor increments releases every 6
- months, we have to make a major increment every 50 years. Assuming
- major increments releases every 5 years, we're ok for the next 155
- years -- good enough for me.
+ '304e' (0x33303465). When the major version reaches 10, the
+ letters A-Z will be used. Assuming minor increments releases every
+ 6 months, we have to make a major increment every 50 years.
+ Assuming major increments releases every 5 years, we're ok for the
+ next 155 years -- good enough for me.
A record has a tag, length and variable amount of data.
data: item*
Records are not nested, but there is a record hierarchy. Tag
- numbers reflect this hierarchy. Tags are unique across bbg and da
- files. Some record types have a varying amount of data. The LENGTH
- is usually used to determine how much data. The tag value is split
- into 4 8-bit fields, one for each of four possible levels. The
- most significant is allocated first. Unused levels are zero.
- Active levels are odd-valued, so that the LSB of the level is one.
- A sub-level incorporates the values of its superlevels. This
- formatting allows you to determine the tag heirarchy, without
- understanding the tags themselves, and is similar to the standard
- section numbering used in technical documents. Level values
- [1..3f] are used for common tags, values [41..9f] for the graph
- file and [a1..ff] for the counter file.
-
- The basic block graph file contains the following records
- bbg: unit function-graph*
+ numbers reflect this hierarchy. Tags are unique across note and
+ data files. Some record types have a varying amount of data. The
+ LENGTH is the number of 4bytes that follow and is usually used to
+ determine how much data. The tag value is split into 4 8-bit
+ fields, one for each of four possible levels. The most significant
+ is allocated first. Unused levels are zero. Active levels are
+ odd-valued, so that the LSB of the level is one. A sub-level
+ incorporates the values of its superlevels. This formatting allows
+ you to determine the tag hierarchy, without understanding the tags
+ themselves, and is similar to the standard section numbering used
+ in technical documents. Level values [1..3f] are used for common
+ tags, values [41..9f] for the notes file and [a1..ff] for the data
+ file.
+
+ The notes file contains the following records
+ note: unit function-graph*
unit: header int32:checksum string:source
function-graph: announce_function basic_blocks {arcs | lines}*
- announce_function: header int32:ident int32:checksum
+ announce_function: header int32:ident
+ int32:lineno_checksum int32:cfg_checksum
string:name string:source int32:lineno
basic_block: header int32:flags*
arcs: header int32:block_no arc*
blocks they are for.
The data file contains the following records.
- da: {unit function-data* summary:object summary:program*}*
+ data: {unit summary:object summary:program* function-data*}*
unit: header int32:checksum
- function-data: announce_function arc_counts
- announce_function: header int32:ident int32:checksum
- arc_counts: header int64:count*
- summary: int32:checksum {count-summary}GCOV_COUNTERS
+ function-data: announce_function present counts
+ announce_function: header int32:ident
+ int32:lineno_checksum int32:cfg_checksum
+ present: header int32:present
+ counts: header int64:count*
+ summary: int32:checksum {count-summary}GCOV_COUNTERS_SUMMABLE
count-summary: int32:num int32:runs int64:sum
- int64:max int64:sum_max
-
- The ANNOUNCE_FUNCTION record is the same as that in the BBG file,
- but without the source location.
- The ARC_COUNTS gives the counter values for those arcs that are
- instrumented. The SUMMARY records give information about the whole
- object file and about the whole program. The checksum is used for
- whole program summaries, and disambiguates different programs which
- include the same instrumented object file. There may be several
- program summaries, each with a unique checksum. The object
- summary's checkum is zero. Note that the da file might contain
- information from several runs concatenated, or the data might be
- merged.
+ int64:max int64:sum_max histogram
+ histogram: {int32:bitvector}8 histogram-buckets*
+ histogram-buckets: int32:num int64:min int64:sum
+
+ The ANNOUNCE_FUNCTION record is the same as that in the note file,
+ but without the source location. The COUNTS gives the
+ counter values for instrumented features. The about the whole
+ program. The checksum is used for whole program summaries, and
+ disambiguates different programs which include the same
+ instrumented object file. There may be several program summaries,
+ each with a unique checksum. The object summary's checksum is
+ zero. Note that the data file might contain information from
+ several runs concatenated, or the data might be merged.
This file is included by both the compiler, gcov tools and the
runtime support library libgcov. IN_LIBGCOV and IN_GCOV are used to
#ifndef GCC_GCOV_IO_H
#define GCC_GCOV_IO_H
-#if IN_LIBGCOV
-/* About the target */
-
-typedef unsigned gcov_unsigned_t __attribute__ ((mode (SI)));
-typedef unsigned gcov_position_t __attribute__ ((mode (SI)));
-#if LONG_LONG_TYPE_SIZE > 32
-typedef signed gcov_type __attribute__ ((mode (DI)));
-#else
-typedef signed gcov_type __attribute__ ((mode (SI)));
-#endif
-
-#if defined (TARGET_HAS_F_SETLKW)
-#define GCOV_LOCKED 1
-#else
-#define GCOV_LOCKED 0
-#endif
-
-#else /* !IN_LIBGCOV */
+#ifndef IN_LIBGCOV
/* About the host */
typedef unsigned gcov_unsigned_t;
/* gcov_type is typedef'd elsewhere for the compiler */
#if IN_GCOV
#define GCOV_LINKAGE static
-typedef HOST_WIDEST_INT gcov_type;
+typedef int64_t gcov_type;
+typedef uint64_t gcov_type_unsigned;
#if IN_GCOV > 0
#include <sys/types.h>
#endif
#else /*!IN_GCOV */
-#if LONG_LONG_TYPE_SIZE > 32
-#define GCOV_TYPE_NODE intDI_type_node
-#else
-#define GCOV_TYPE_NODE intSI_type_node
-#endif
+#define GCOV_TYPE_SIZE (LONG_LONG_TYPE_SIZE > 32 ? 64 : 32)
#endif
#if defined (HOST_HAS_F_SETLKW)
#define GCOV_LOCKED 0
#endif
-#endif /* !IN_LIBGCOV */
+#define ATTRIBUTE_HIDDEN
-/* In gcov we want function linkage to be static. In libgcov we need
- these functions to be extern, so prefix them with __gcov. In the
- compiler we want it extern, so that they can be accessed from
- elsewhere. */
-#if IN_LIBGCOV
-#define gcov_var __gcov_var
-#define gcov_open __gcov_open
-#define gcov_close __gcov_close
-#define gcov_write_tag_length __gcov_write_tag_length
-#define gcov_position __gcov_position
-#define gcov_seek __gcov_seek
-#define gcov_rewrite __gcov_rewrite
-#define gcov_is_error __gcov_is_error
-#define gcov_is_eof __gcov_is_eof
-#define gcov_write_unsigned __gcov_write_unsigned
-#define gcov_write_counter __gcov_write_counter
-#define gcov_write_summary __gcov_write_summary
-#define gcov_read_unsigned __gcov_read_unsigned
-#define gcov_read_counter __gcov_read_counter
-#define gcov_read_summary __gcov_read_summary
-
-/* Poison these, so they don't accidentally slip in. */
-#pragma GCC poison gcov_write_string gcov_write_tag gcov_write_length
-#pragma GCC poison gcov_read_string gcov_sync gcov_time
-
-#endif
+#endif /* !IN_LIBGOCV */
#ifndef GCOV_LINKAGE
#define GCOV_LINKAGE extern
#endif
+#if IN_LIBGCOV
+#define gcov_nonruntime_assert(EXPR) ((void)(0 && (EXPR)))
+#else
+#define gcov_nonruntime_assert(EXPR) gcc_assert (EXPR)
+#define gcov_error(...) fatal_error (input_location, __VA_ARGS__)
+#endif
+
/* File suffixes. */
-#define GCOV_DATA_SUFFIX ".da"
-#define GCOV_GRAPH_SUFFIX ".bbg"
+#define GCOV_DATA_SUFFIX ".gcda"
+#define GCOV_NOTE_SUFFIX ".gcno"
-/* File magic. */
-#define GCOV_DATA_MAGIC 0x67636f76 /* "gcov" */
-#define GCOV_GRAPH_MAGIC 0x67626267 /* "gbbg" */
+/* File magic. Must not be palindromes. */
+#define GCOV_DATA_MAGIC ((gcov_unsigned_t)0x67636461) /* "gcda" */
+#define GCOV_NOTE_MAGIC ((gcov_unsigned_t)0x67636e6f) /* "gcno" */
/* gcov-iov.h is automatically generated by the makefile from
version.c, it looks like
- #define GCOV_VERSION ((unsigned)0x89abcdef)
+ #define GCOV_VERSION ((gcov_unsigned_t)0x89abcdef)
*/
#include "gcov-iov.h"
+/* Convert a magic or version number to a 4 character string. */
+#define GCOV_UNSIGNED2STRING(ARRAY,VALUE) \
+ ((ARRAY)[0] = (char)((VALUE) >> 24), \
+ (ARRAY)[1] = (char)((VALUE) >> 16), \
+ (ARRAY)[2] = (char)((VALUE) >> 8), \
+ (ARRAY)[3] = (char)((VALUE) >> 0))
+
/* The record tags. Values [1..3f] are for tags which may be in either
- file. Values [41..9f] for those in the bbg file and [a1..ff] for
- the data file. */
+ file. Values [41..9f] for those in the note file and [a1..ff] for
+ the data file. The tag value zero is used as an explicit end of
+ file marker -- it is not required to be present. */
#define GCOV_TAG_FUNCTION ((gcov_unsigned_t)0x01000000)
-#define GCOV_TAG_FUNCTION_LENGTH (2 * 4)
+#define GCOV_TAG_FUNCTION_LENGTH (3)
#define GCOV_TAG_BLOCKS ((gcov_unsigned_t)0x01410000)
-#define GCOV_TAG_BLOCKS_LENGTH(NUM) ((NUM) * 4)
+#define GCOV_TAG_BLOCKS_LENGTH(NUM) (NUM)
+#define GCOV_TAG_BLOCKS_NUM(LENGTH) (LENGTH)
#define GCOV_TAG_ARCS ((gcov_unsigned_t)0x01430000)
-#define GCOV_TAG_ARCS_LENGTH(NUM) (1 * 4 + (NUM) * (2 * 4))
+#define GCOV_TAG_ARCS_LENGTH(NUM) (1 + (NUM) * 2)
+#define GCOV_TAG_ARCS_NUM(LENGTH) (((LENGTH) - 1) / 2)
#define GCOV_TAG_LINES ((gcov_unsigned_t)0x01450000)
#define GCOV_TAG_COUNTER_BASE ((gcov_unsigned_t)0x01a10000)
-#define GCOV_TAG_COUNTER_LENGTH(NUM) ((NUM) * 8)
-#define GCOV_TAG_OBJECT_SUMMARY ((gcov_unsigned_t)0xa1000000)
+#define GCOV_TAG_COUNTER_LENGTH(NUM) ((NUM) * 2)
+#define GCOV_TAG_COUNTER_NUM(LENGTH) ((LENGTH) / 2)
+#define GCOV_TAG_OBJECT_SUMMARY ((gcov_unsigned_t)0xa1000000) /* Obsolete */
#define GCOV_TAG_PROGRAM_SUMMARY ((gcov_unsigned_t)0xa3000000)
-#define GCOV_TAG_SUMMARY_LENGTH \
- (1 * 4 + GCOV_COUNTERS_SUMMABLE * (2 * 4 + 3 * 8))
+#define GCOV_TAG_SUMMARY_LENGTH(NUM) \
+ (1 + GCOV_COUNTERS_SUMMABLE * (10 + 3 * 2) + (NUM) * 5)
+#define GCOV_TAG_AFDO_FILE_NAMES ((gcov_unsigned_t)0xaa000000)
+#define GCOV_TAG_AFDO_FUNCTION ((gcov_unsigned_t)0xac000000)
+#define GCOV_TAG_AFDO_WORKING_SET ((gcov_unsigned_t)0xaf000000)
+
/* Counters that are collected. */
-#define GCOV_COUNTER_ARCS 0 /* Arc transitions. */
-#define GCOV_COUNTERS_SUMMABLE 1 /* Counters which can be
- summaried. */
-#define GCOV_COUNTERS 1
-/* A list of human readable names of the counters */
-#define GCOV_COUNTER_NAMES {"arcs"}
+#define DEF_GCOV_COUNTER(COUNTER, NAME, MERGE_FN) COUNTER,
+enum {
+#include "gcov-counter.def"
+GCOV_COUNTERS
+};
+#undef DEF_GCOV_COUNTER
+
+/* Counters which can be summaried. */
+#define GCOV_COUNTERS_SUMMABLE (GCOV_COUNTER_ARCS + 1)
+
+/* The first of counters used for value profiling. They must form a
+ consecutive interval and their order must match the order of
+ HIST_TYPEs in value-prof.h. */
+#define GCOV_FIRST_VALUE_COUNTER GCOV_COUNTERS_SUMMABLE
+
+/* The last of counters used for value profiling. */
+#define GCOV_LAST_VALUE_COUNTER (GCOV_COUNTERS - 1)
-/* Names of merge functions for counters. */
-#define GCOV_MERGE_FUNCTIONS {"__gcov_merge_add"}
+/* Number of counters used for value profiling. */
+#define GCOV_N_VALUE_COUNTERS \
+ (GCOV_LAST_VALUE_COUNTER - GCOV_FIRST_VALUE_COUNTER + 1)
+
+/* The number of hottest callees to be tracked. */
+#define GCOV_ICALL_TOPN_VAL 2
+
+/* The number of counter entries per icall callsite. */
+#define GCOV_ICALL_TOPN_NCOUNTS (1 + GCOV_ICALL_TOPN_VAL * 4)
/* Convert a counter index to a tag. */
#define GCOV_TAG_FOR_COUNTER(COUNT) \
/* Return nonzero if SUB is an immediate subtag of TAG. */
#define GCOV_TAG_IS_SUBTAG(TAG,SUB) \
(GCOV_TAG_MASK (TAG) >> 8 == GCOV_TAG_MASK (SUB) \
- && !(((SUB) ^ (TAG)) & ~GCOV_TAG_MASK(TAG)))
+ && !(((SUB) ^ (TAG)) & ~GCOV_TAG_MASK (TAG)))
/* Return nonzero if SUB is at a sublevel to TAG. */
#define GCOV_TAG_IS_SUBLEVEL(TAG,SUB) \
/* Structured records. */
-/* Cumulative counter data. */
+/* Structure used for each bucket of the log2 histogram of counter values. */
+typedef struct
+{
+ /* Number of counters whose profile count falls within the bucket. */
+ gcov_unsigned_t num_counters;
+ /* Smallest profile count included in this bucket. */
+ gcov_type min_value;
+ /* Cumulative value of the profile counts in this bucket. */
+ gcov_type cum_value;
+} gcov_bucket_type;
+
+/* For a log2 scale histogram with each range split into 4
+ linear sub-ranges, there will be at most 64 (max gcov_type bit size) - 1 log2
+ ranges since the lowest 2 log2 values share the lowest 4 linear
+ sub-range (values 0 - 3). This is 252 total entries (63*4). */
+
+#define GCOV_HISTOGRAM_SIZE 252
+
+/* How many unsigned ints are required to hold a bit vector of non-zero
+ histogram entries when the histogram is written to the gcov file.
+ This is essentially a ceiling divide by 32 bits. */
+#define GCOV_HISTOGRAM_BITVECTOR_SIZE (GCOV_HISTOGRAM_SIZE + 31) / 32
+
+/* Cumulative counter data. */
struct gcov_ctr_summary
{
gcov_unsigned_t num; /* number of counters. */
gcov_type sum_all; /* sum of all counters accumulated. */
gcov_type run_max; /* maximum value on a single run. */
gcov_type sum_max; /* sum of individual run max values. */
+ gcov_bucket_type histogram[GCOV_HISTOGRAM_SIZE]; /* histogram of
+ counter values. */
};
/* Object & program summary record. */
struct gcov_ctr_summary ctrs[GCOV_COUNTERS_SUMMABLE];
};
-/* Structures embedded in coveraged program. The structures generated
- by write_profile must match these. */
-
-#if IN_LIBGCOV
-/* Information about a single function. This uses the trailing array
- idiom. The number of counters is determined from the counter_mask
- in gcov_info. We hold an array of function info, so have to
- explicitly calculate the correct array stride. */
-struct gcov_fn_info
-{
- gcov_unsigned_t ident; /* unique ident of function */
- gcov_unsigned_t checksum; /* function checksum */
- unsigned n_ctrs[0]; /* instrumented counters */
-};
-
-/* Type of function used to merge counters. */
-typedef void (*gcov_merge_fn) (gcov_type *, gcov_unsigned_t);
-
-/* Information about counters. */
-struct gcov_ctr_info
-{
- gcov_unsigned_t num; /* number of counters. */
- gcov_type *values; /* their values. */
- gcov_merge_fn merge; /* The function used to merge them. */
-};
-
-/* Information about a single object file. */
-struct gcov_info
-{
- gcov_unsigned_t version; /* expected version number */
- struct gcov_info *next; /* link to next, used by libgcc */
-
- const char *filename; /* output file name */
-
- unsigned n_functions; /* number of functions */
- const struct gcov_fn_info *functions; /* table of functions */
-
- unsigned ctr_mask; /* mask of counters instrumented. */
- struct gcov_ctr_info counts[0]; /* count data. The number of bits
- set in the ctr_mask field
- determines how big this array
- is. */
-};
-
-/* Register a new object file module. */
-extern void __gcov_init (struct gcov_info *);
-
-/* Called before fork, to avoid double counting. */
-extern void __gcov_flush (void);
-
-/* The merge function that just sums the counters. */
-extern void __gcov_merge_add (gcov_type *, unsigned);
-#endif /* IN_LIBGCOV */
-
-#if IN_LIBGCOV >= 0
-
-/* Optimum size read from or written to disk. */
-#define GCOV_BLOCK_SIZE (1 << 12)
-
-GCOV_LINKAGE struct gcov_var
-{
- FILE *file;
- gcov_position_t start; /* Position of first byte of block */
- unsigned offset; /* Read/write position within the block. */
- unsigned length; /* Read limit in the block. */
- unsigned overread; /* Number of bytes overread. */
- int error; /* < 0 overflow, > 0 disk error. */
- int mode; /* < 0 writing, > 0 reading */
-#if IN_LIBGCOV
- /* Holds one block plus 4 bytes, thus all coverage reads & writes
- fit within this buffer and we always can transfer GCOV_BLOCK_SIZE
- to and from the disk. libgcov never backtracks and only writes 4
- or 8 byte objects. */
- unsigned char buffer[GCOV_BLOCK_SIZE + 4];
-#else
- /* Holds a variable length block, as the compiler can write
- strings and needs to backtrack. */
- size_t alloc;
- unsigned char *buffer;
+#if !defined(inhibit_libc)
+
+/* Functions for reading and writing gcov files. In libgcov you can
+ open the file for reading then writing. Elsewhere you can open the
+ file either for reading or for writing. When reading a file you may
+ use the gcov_read_* functions, gcov_sync, gcov_position, &
+ gcov_error. When writing a file you may use the gcov_write
+ functions, gcov_seek & gcov_error. When a file is to be rewritten
+ you use the functions for reading, then gcov_rewrite then the
+ functions for writing. Your file may become corrupted if you break
+ these invariants. */
+
+#if !IN_LIBGCOV
+GCOV_LINKAGE int gcov_open (const char */*name*/, int /*direction*/);
+GCOV_LINKAGE int gcov_magic (gcov_unsigned_t, gcov_unsigned_t);
#endif
-} gcov_var;
-
-/* Functions for reading and writing gcov files. You can open a file
- for (1) reading or (2) writing or (3) reading then rewriting. When
- reading a file you may use the gcov_read_* functions, gcov_sync,
- gcov_position, & gcov_error. When writing a file you
- may use the gcov_write functions, gcov_seek & gcov_error. When a
- file is to be rewritten you use the functions for reading, then
- gcov_rewrite then the functions for writing. Your file may become
- corrupted if you break these invariants. */
-GCOV_LINKAGE int gcov_open (const char */*name*/, int /*truncate*/);
-GCOV_LINKAGE int gcov_close (void);
/* Available everywhere. */
-static gcov_position_t gcov_position (void);
-static int gcov_is_error (void);
-static int gcov_is_eof (void);
-
-GCOV_LINKAGE gcov_unsigned_t gcov_read_unsigned (void);
-GCOV_LINKAGE gcov_type gcov_read_counter (void);
-GCOV_LINKAGE void gcov_read_summary (struct gcov_summary *);
-
-#if IN_LIBGCOV
-/* Available only in libgcov */
-GCOV_LINKAGE void gcov_write_counter (gcov_type);
-GCOV_LINKAGE void gcov_write_tag_length (gcov_unsigned_t, gcov_unsigned_t);
-GCOV_LINKAGE void gcov_write_summary (gcov_unsigned_t /*tag*/,
- const struct gcov_summary *);
-static void gcov_rewrite (void);
-GCOV_LINKAGE void gcov_seek (gcov_position_t /*position*/);
-#else
-/* Available outside libgcov */
+GCOV_LINKAGE int gcov_close (void) ATTRIBUTE_HIDDEN;
+GCOV_LINKAGE gcov_unsigned_t gcov_read_unsigned (void) ATTRIBUTE_HIDDEN;
+GCOV_LINKAGE gcov_type gcov_read_counter (void) ATTRIBUTE_HIDDEN;
+GCOV_LINKAGE void gcov_read_summary (struct gcov_summary *) ATTRIBUTE_HIDDEN;
GCOV_LINKAGE const char *gcov_read_string (void);
GCOV_LINKAGE void gcov_sync (gcov_position_t /*base*/,
gcov_unsigned_t /*length */);
-#endif
#if !IN_GCOV
/* Available outside gcov */
-GCOV_LINKAGE void gcov_write_unsigned (gcov_unsigned_t);
+GCOV_LINKAGE void gcov_write_unsigned (gcov_unsigned_t) ATTRIBUTE_HIDDEN;
#endif
#if !IN_GCOV && !IN_LIBGCOV
/* Available only in compiler */
+GCOV_LINKAGE unsigned gcov_histo_index (gcov_type value);
GCOV_LINKAGE void gcov_write_string (const char *);
GCOV_LINKAGE gcov_position_t gcov_write_tag (gcov_unsigned_t);
GCOV_LINKAGE void gcov_write_length (gcov_position_t /*position*/);
#endif
-#if IN_GCOV > 0
-/* Available in gcov */
-GCOV_LINKAGE time_t gcov_time (void);
-#endif
-
-/* Make sure the library is used correctly. */
-#if ENABLE_CHECKING
-#define GCOV_CHECK(expr) ((expr) ? (void)0 : (void)abort ())
-#else
-#define GCOV_CHECK(expr)
-#endif
-#define GCOV_CHECK_READING() GCOV_CHECK(gcov_var.mode > 0)
-#define GCOV_CHECK_WRITING() GCOV_CHECK(gcov_var.mode < 0)
-
-/* Save the current position in the gcov file. */
+#if IN_GCOV <= 0 && !IN_LIBGCOV
+/* Available in gcov-dump and the compiler. */
-static inline gcov_position_t
-gcov_position (void)
-{
- GCOV_CHECK_READING ();
- return gcov_var.start + gcov_var.offset;
-}
+/* Number of data points in the working set summary array. Using 128
+ provides information for at least every 1% increment of the total
+ profile size. The last entry is hardwired to 99.9% of the total. */
+#define NUM_GCOV_WORKING_SETS 128
-/* Return nonzero if we read to end of file. */
-
-static inline int
-gcov_is_eof ()
+/* Working set size statistics for a given percentage of the entire
+ profile (sum_all from the counter summary). */
+typedef struct gcov_working_set_info
{
- return !gcov_var.overread;
-}
-
-/* Return nonzero if the error flag is set. */
-
-static inline int
-gcov_is_error ()
-{
- return gcov_var.file ? gcov_var.error : 1;
-}
-
-#if IN_LIBGCOV
-/* Move to beginning of file and intialize for writing. */
+ /* Number of hot counters included in this working set. */
+ unsigned num_counters;
+ /* Smallest counter included in this working set. */
+ gcov_type min_counter;
+} gcov_working_set_t;
+
+GCOV_LINKAGE void compute_working_sets (const struct gcov_ctr_summary *summary,
+ gcov_working_set_t *gcov_working_sets);
+#endif
-static inline void
-gcov_rewrite (void)
-{
- GCOV_CHECK_READING ();
- gcov_var.mode = -1;
- gcov_var.start = 0;
- gcov_var.offset = 0;
- fseek (gcov_var.file, 0L, SEEK_SET);
-}
+#if IN_GCOV > 0
+/* Available in gcov */
+GCOV_LINKAGE time_t gcov_time (void);
#endif
-#endif /* IN_LIBGCOV >= 0 */
+#endif /* !inhibit_libc */
#endif /* GCC_GCOV_IO_H */
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