/* File format for coverage information
- Copyright (C) 1996, 1997, 1998, 2000, 2002 Free Software Foundation, Inc.
+ Copyright (C) 1996, 1997, 1998, 2000, 2002,
+ 2003, 2004, 2005, 2008, 2009 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. */
-
-/* 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.
+ 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 basic block graph file contains the following records
- bbg: function-graph*
+ note: unit function-graph*
+ unit: header int32:checksum string:source
function-graph: announce_function basic_blocks {arcs | lines}*
- announce_function: header string:name 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*
arc: int32:dest_block int32:flags
blocks they are for.
The data file contains the following records.
- da: {function-data* summary:object summary:program*}*
- function-data: announce_function arc_counts
- announce_function: header string:name int32:checksum
- arc_counts: header int64:count*
- summary: in32:checksum int32:runs int32:arcs int64:sum int64:max \
- int64:max_sum int64:sum_max
-
- The ANNOUNCE_FUNCTION record is the same as that in the BBG file.
- 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.
+ data: {unit summary:object summary:program* function-data*}*
+ unit: header int32:checksum
+ 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 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
- library. The IN_LIBGCC2 define distinguishes these cases. When
- IN_LIBGCC2 is nonzero, we're building libgcc2 for the target and
- know the compiler is (the just built) gcc. Otherwise we're
- generating code for the host, and the compiler may or may not be
- gcc. In this latter case, you must ensure that 'gcov_type' is
- typedefed to something suitable (unsigned HOST_WIDEST_INT is
- usually what you want). */
+ runtime support library libgcov. IN_LIBGCOV and IN_GCOV are used to
+ distinguish which case is which. If IN_LIBGCOV is nonzero,
+ libgcov is being built. If IN_GCOV is nonzero, the gcov tools are
+ being built. Otherwise the compiler is being built. IN_GCOV may be
+ positive or negative. If positive, we are compiling a tool that
+ requires additional functions (see the code for knowledge of what
+ those functions are). */
#ifndef GCC_GCOV_IO_H
#define GCC_GCOV_IO_H
-#if IN_LIBGCC2
-#if LONG_TYPE_SIZE == GCOV_TYPE_SIZE
-typedef long gcov_type;
+#if IN_LIBGCOV
+/* About the target */
+
+#if BITS_PER_UNIT == 8
+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
+#else
+#if BITS_PER_UNIT == 16
+typedef unsigned gcov_unsigned_t __attribute__ ((mode (HI)));
+typedef unsigned gcov_position_t __attribute__ ((mode (HI)));
+#if LONG_LONG_TYPE_SIZE > 32
+typedef signed gcov_type __attribute__ ((mode (SI)));
#else
-typedef long long gcov_type;
+typedef signed gcov_type __attribute__ ((mode (HI)));
+#endif
+#else
+typedef unsigned gcov_unsigned_t __attribute__ ((mode (QI)));
+typedef unsigned gcov_position_t __attribute__ ((mode (QI)));
+#if LONG_LONG_TYPE_SIZE > 32
+typedef signed gcov_type __attribute__ ((mode (HI)));
+#else
+typedef signed gcov_type __attribute__ ((mode (QI)));
+#endif
+#endif
+#endif
+
+
+#if defined (TARGET_POSIX_IO)
+#define GCOV_LOCKED 1
+#else
+#define GCOV_LOCKED 0
+#endif
+
+#else /* !IN_LIBGCOV */
+/* About the host */
+
+typedef unsigned gcov_unsigned_t;
+typedef unsigned gcov_position_t;
+/* gcov_type is typedef'd elsewhere for the compiler */
+#if IN_GCOV
+#define GCOV_LINKAGE static
+typedef HOST_WIDEST_INT gcov_type;
+#if IN_GCOV > 0
+#include <sys/types.h>
+#endif
+#else /*!IN_GCOV */
+#define GCOV_TYPE_SIZE (LONG_LONG_TYPE_SIZE > 32 ? 64 : 32)
+#endif
+
+#if defined (HOST_HAS_F_SETLKW)
+#define GCOV_LOCKED 1
+#else
+#define GCOV_LOCKED 0
+#endif
+
+#endif /* !IN_LIBGCOV */
+
+/* In gcov we want function linkage to be static. In the compiler we want
+ it extern, so that they can be accessed from elsewhere. In libgcov we
+ need these functions to be extern, so prefix them with __gcov. In
+ libgcov they must also be hidden so that the instance in the executable
+ is not also used in a DSO. */
+#if IN_LIBGCOV
+
+#include "tconfig.h"
+
+#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_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 gcov_magic
+
+#ifdef HAVE_GAS_HIDDEN
+#define ATTRIBUTE_HIDDEN __attribute__ ((__visibility__ ("hidden")))
+#else
+#define ATTRIBUTE_HIDDEN
+#endif
+
+#else
+
+#define ATTRIBUTE_HIDDEN
+
+#endif
+
+#ifndef GCOV_LINKAGE
+#define GCOV_LINKAGE extern
#endif
-#endif /* IN_LIBGCC2 */
/* 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. */
-
-#define GCOV_TAG_FUNCTION ((unsigned)0x01000000)
-#define GCOV_TAG_BLOCKS ((unsigned)0x01410000)
-#define GCOV_TAG_ARCS ((unsigned)0x01430000)
-#define GCOV_TAG_LINES ((unsigned)0x01450000)
-#define GCOV_TAG_ARC_COUNTS ((unsigned)0x01a10000)
-#define GCOV_TAG_OBJECT_SUMMARY ((unsigned)0xa1000000)
-#define GCOV_TAG_PROGRAM_SUMMARY ((unsigned)0xa3000000)
-#define GCOV_TAG_PLACEHOLDER_SUMMARY ((unsigned)0xa5000000)
-#define GCOV_TAG_INCORRECT_SUMMARY ((unsigned)0xa7000000)
+ 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 (3)
+#define GCOV_TAG_BLOCKS ((gcov_unsigned_t)0x01410000)
+#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 + (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) * 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 + GCOV_COUNTERS_SUMMABLE * (2 + 3 * 2))
+
+/* Counters that are collected. */
+#define GCOV_COUNTER_ARCS 0 /* Arc transitions. */
+#define GCOV_COUNTERS_SUMMABLE 1 /* Counters which can be
+ summaried. */
+#define GCOV_FIRST_VALUE_COUNTER 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_COUNTER_V_INTERVAL 1 /* Histogram of value inside an interval. */
+#define GCOV_COUNTER_V_POW2 2 /* Histogram of exact power2 logarithm
+ of a value. */
+#define GCOV_COUNTER_V_SINGLE 3 /* The most common value of expression. */
+#define GCOV_COUNTER_V_DELTA 4 /* The most common difference between
+ consecutive values of expression. */
+
+#define GCOV_COUNTER_V_INDIR 5 /* The most common indirect address */
+#define GCOV_COUNTER_AVERAGE 6 /* Compute average value passed to the
+ counter. */
+#define GCOV_COUNTER_IOR 7 /* IOR of the all values passed to
+ counter. */
+#define GCOV_LAST_VALUE_COUNTER 7 /* The last of counters used for value
+ profiling. */
+#define GCOV_COUNTERS 8
+
+/* Number of counters used for value profiling. */
+#define GCOV_N_VALUE_COUNTERS \
+ (GCOV_LAST_VALUE_COUNTER - GCOV_FIRST_VALUE_COUNTER + 1)
+
+ /* A list of human readable names of the counters */
+#define GCOV_COUNTER_NAMES {"arcs", "interval", "pow2", "single", \
+ "delta", "indirect_call", "average", "ior"}
+
+ /* Names of merge functions for counters. */
+#define GCOV_MERGE_FUNCTIONS {"__gcov_merge_add", \
+ "__gcov_merge_add", \
+ "__gcov_merge_add", \
+ "__gcov_merge_single", \
+ "__gcov_merge_delta", \
+ "__gcov_merge_single", \
+ "__gcov_merge_add", \
+ "__gcov_merge_ior"}
+
+/* Convert a counter index to a tag. */
+#define GCOV_TAG_FOR_COUNTER(COUNT) \
+ (GCOV_TAG_COUNTER_BASE + ((gcov_unsigned_t)(COUNT) << 17))
+/* Convert a tag to a counter. */
+#define GCOV_COUNTER_FOR_TAG(TAG) \
+ ((unsigned)(((TAG) - GCOV_TAG_COUNTER_BASE) >> 17))
+/* Check whether a tag is a counter tag. */
+#define GCOV_TAG_IS_COUNTER(TAG) \
+ (!((TAG) & 0xFFFF) && GCOV_COUNTER_FOR_TAG (TAG) < GCOV_COUNTERS)
/* The tag level mask has 1's in the position of the inner levels, &
the lsb of the current level, and zero on the current and outer
(GCOV_TAG_MASK (TAG) > GCOV_TAG_MASK (SUB))
/* Basic block flags. */
-#define GCOV_BLOCK_UNEXPECTED (1 << 0)
+#define GCOV_BLOCK_UNEXPECTED (1 << 1)
/* Arc flags. */
#define GCOV_ARC_ON_TREE (1 << 0)
/* Structured records. */
+/* Cumulative counter data. */
+struct gcov_ctr_summary
+{
+ gcov_unsigned_t num; /* number of counters. */
+ gcov_unsigned_t runs; /* number of program runs */
+ 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. */
+};
+
/* Object & program summary record. */
struct gcov_summary
{
- unsigned checksum; /* checksum of program */
- unsigned runs; /* number of program runs */
- unsigned arcs; /* number of instrumented arcs */
- gcov_type arc_sum; /* sum of all arc counters */
- gcov_type arc_max_one; /* max counter on any one run */
- gcov_type arc_max_sum; /* maximum arc_sum */
- gcov_type arc_sum_max; /* sum of max_one */
+ gcov_unsigned_t checksum; /* checksum of program */
+ struct gcov_ctr_summary ctrs[GCOV_COUNTERS_SUMMABLE];
};
/* Structures embedded in coveraged program. The structures generated
by write_profile must match these. */
-/* Information about section of counters for a function. */
-struct counter_section
+#if IN_LIBGCOV
+/* Information about counters for a single function. */
+struct gcov_ctr_info
{
- unsigned tag; /* Tag of the section. */
- unsigned n_counters; /* Number of counters in the section. */
+ gcov_unsigned_t num; /* number of counters. */
+ gcov_type *values; /* their values. */
};
-#if IN_LIBGCC2
-/* Information about section of counters for an object file. */
-struct counter_section_data
-{
- unsigned tag; /* Tag of the section. */
- unsigned n_counters; /* Number of counters in the section. */
- gcov_type *counters; /* The data. */
-};
+/* Information about a single function. This uses the trailing array
+ idiom. The number of counters is determined from the merge pointer
+ array in gcov_info. The key is used to detect which of a set of
+ comdat functions was selected -- it points to the gcov_info object
+ of the object file containing the selected comdat function. */
-/* Information about a single function. */
-struct function_info
+struct gcov_fn_info
{
- const char *name; /* (mangled) name of function */
- unsigned checksum; /* function checksum */
- unsigned n_counter_sections; /* Number of types of counters */
- const struct counter_section *counter_sections;
- /* The section descriptions */
+ const struct gcov_info *key; /* comdat key */
+ gcov_unsigned_t ident; /* unique ident of function */
+ gcov_unsigned_t lineno_checksum; /* function lineo_checksum */
+ gcov_unsigned_t cfg_checksum; /* function cfg checksum */
+ struct gcov_ctr_info ctrs[0]; /* instrumented counters */
};
+/* Type of function used to merge counters. */
+typedef void (*gcov_merge_fn) (gcov_type *, gcov_unsigned_t);
+
/* Information about a single object file. */
struct gcov_info
{
- unsigned long version; /* expected version number */
- struct gcov_info *next; /* link to next, used by libgcc */
+ gcov_unsigned_t version; /* expected version number */
+ struct gcov_info *next; /* link to next, used by libgcov */
+ gcov_unsigned_t stamp; /* uniquifying time stamp */
const char *filename; /* output file name */
- long wkspc; /* libgcc workspace */
- unsigned n_functions; /* number of functions */
- const struct function_info *functions; /* table of functions */
-
- unsigned n_counter_sections; /* Number of types of counters */
- const struct counter_section_data *counter_sections;
- /* The data to be put into the sections. */
+ gcov_merge_fn merge[GCOV_COUNTERS]; /* merge functions (null for
+ unused) */
+
+ unsigned n_functions; /* number of functions */
+ const struct gcov_fn_info *const *functions; /* pointer to pointers
+ to function information */
};
/* Register a new object file module. */
-extern void __gcov_init (struct gcov_info *);
+extern void __gcov_init (struct gcov_info *) ATTRIBUTE_HIDDEN;
/* Called before fork, to avoid double counting. */
-extern void __gcov_flush (void);
-
-/* Since this file is used in both host and target files, and we don't
- include ansidecl.h in target files, provide some necessary macros. */
-#ifndef PARAMS
-# define PARAMS(X) X
-#endif
-#ifndef ATTRIBUTE_UNUSED
-# define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
-#endif
-
-#endif /* IN_LIBGCC2 */
-
-/* Functions for reading and writing gcov files. */
-static int gcov_write_unsigned PARAMS((FILE *, unsigned))
- ATTRIBUTE_UNUSED;
-static int gcov_write_counter PARAMS((FILE *, gcov_type))
- ATTRIBUTE_UNUSED;
-static int gcov_write_string PARAMS((FILE *, const char *, unsigned))
- ATTRIBUTE_UNUSED;
-static int gcov_read_unsigned PARAMS((FILE *, unsigned *))
- ATTRIBUTE_UNUSED;
-static int gcov_read_counter PARAMS((FILE *, gcov_type *))
- ATTRIBUTE_UNUSED;
-#if !IN_LIBGCC2
-static int gcov_read_string PARAMS((FILE *, char **, unsigned *))
- ATTRIBUTE_UNUSED;
-#endif
-static int gcov_read_summary PARAMS ((FILE *, struct gcov_summary *))
- ATTRIBUTE_UNUSED;
-#if IN_LIBGCC2
-static int gcov_write_summary PARAMS ((FILE *, unsigned,
- const struct gcov_summary *))
- ATTRIBUTE_UNUSED;
+extern void __gcov_flush (void) ATTRIBUTE_HIDDEN;
+
+/* The merge function that just sums the counters. */
+extern void __gcov_merge_add (gcov_type *, unsigned) ATTRIBUTE_HIDDEN;
+
+/* The merge function to choose the most common value. */
+extern void __gcov_merge_single (gcov_type *, unsigned) ATTRIBUTE_HIDDEN;
+
+/* The merge function to choose the most common difference between
+ consecutive values. */
+extern void __gcov_merge_delta (gcov_type *, unsigned) ATTRIBUTE_HIDDEN;
+
+/* The merge function that just ors the counters together. */
+extern void __gcov_merge_ior (gcov_type *, unsigned) ATTRIBUTE_HIDDEN;
+
+/* The profiler functions. */
+extern void __gcov_interval_profiler (gcov_type *, gcov_type, int, unsigned);
+extern void __gcov_pow2_profiler (gcov_type *, gcov_type);
+extern void __gcov_one_value_profiler (gcov_type *, gcov_type);
+extern void __gcov_indirect_call_profiler (gcov_type *, gcov_type, void *, void *);
+extern void __gcov_average_profiler (gcov_type *, gcov_type);
+extern void __gcov_ior_profiler (gcov_type *, gcov_type);
+
+#ifndef inhibit_libc
+/* The wrappers around some library functions.. */
+extern pid_t __gcov_fork (void) ATTRIBUTE_HIDDEN;
+extern int __gcov_execl (const char *, char *, ...) ATTRIBUTE_HIDDEN;
+extern int __gcov_execlp (const char *, char *, ...) ATTRIBUTE_HIDDEN;
+extern int __gcov_execle (const char *, char *, ...) ATTRIBUTE_HIDDEN;
+extern int __gcov_execv (const char *, char *const []) ATTRIBUTE_HIDDEN;
+extern int __gcov_execvp (const char *, char *const []) ATTRIBUTE_HIDDEN;
+extern int __gcov_execve (const char *, char *const [], char *const [])
+ ATTRIBUTE_HIDDEN;
#endif
-#define gcov_save_position(STREAM) \
- da_file_position (STREAM)
-#define gcov_reserve_length(STREAM) \
- (gcov_write_unsigned (STREAM, 0) ? 0 : da_file_position (STREAM) - 4)
-static int gcov_write_length PARAMS((FILE *, long))
- ATTRIBUTE_UNUSED;
-#define gcov_resync(STREAM, BASE, LENGTH) \
- da_file_seek (STREAM, BASE + (long)LENGTH, SEEK_SET)
-#define gcov_skip(STREAM, LENGTH) \
- da_file_seek (STREAM, LENGTH, SEEK_CUR)
-#define gcov_skip_string(STREAM, LENGTH) \
- da_file_seek (STREAM, (LENGTH) + 4 - ((LENGTH) & 3), SEEK_CUR)
-#if IN_LIBGCC2
-static FILE *da_file_open PARAMS ((const char *, int *));
-static int da_file_close PARAMS ((void));
-static int da_file_eof PARAMS ((void));
-static int da_file_error PARAMS ((void));
-#endif
-static unsigned long da_file_position PARAMS ((FILE *));
-static int da_file_seek PARAMS ((FILE *, long, int));
-static size_t da_file_write PARAMS ((const void *, size_t, size_t, FILE *));
-static size_t da_file_read PARAMS ((void *, size_t, size_t, FILE *));
-
-/* Write VALUE to coverage file FILE. Return nonzero if failed due to
- file i/o error, or value error. */
-
-static int
-gcov_write_unsigned (file, value)
- FILE *file;
- unsigned value;
-{
- char buffer[4];
- unsigned ix;
-
- for (ix = sizeof (buffer); ix--; )
- {
- buffer[ix] = value;
- value >>= 8;
- }
- return ((sizeof (value) > sizeof (buffer) && value)
- || da_file_write (buffer, 1, sizeof (buffer), file) != sizeof (buffer));
-}
-
-/* Write VALUE to coverage file FILE. Return nonzero if failed due to
- file i/o error, or value error. Negative values are not checked
- here -- they are checked in gcov_read_counter. */
-
-static int
-gcov_write_counter (file, value)
- FILE *file;
- gcov_type value;
-{
- char buffer[8];
- unsigned ix;
-
- for (ix = sizeof (buffer); ix--; )
- {
- buffer[ix] = value;
- value >>= 8;
- }
- return ((sizeof (value) > sizeof (buffer) && value != 0 && value != -1)
- || da_file_write (buffer, 1, sizeof (buffer), file) != sizeof (buffer));
-}
-/* Write VALUE to coverage file FILE. Return nonzero if failed due to
- file i/o error, or value error. */
+#endif /* IN_LIBGCOV */
-static int
-gcov_write_string (file, string, length)
- FILE *file;
- unsigned length;
- const char *string;
-{
- unsigned pad = 0;
- unsigned rem = 4 - (length & 3);
-
- if (string)
- return (gcov_write_unsigned (file, length)
- || da_file_write (string, 1, length, file) != length
- || da_file_write (&pad, 1, rem, file) != rem);
- else
- return gcov_write_unsigned (file, 0);
-}
+#if IN_LIBGCOV >= 0
-/* Read *VALUE_P from coverage file FILE. Return nonzero if failed
- due to file i/o error, or range error. */
+/* Optimum number of gcov_unsigned_t's read from or written to disk. */
+#define GCOV_BLOCK_SIZE (1 << 10)
-static int
-gcov_read_unsigned (file, value_p)
- FILE *file;
- unsigned *value_p;
+GCOV_LINKAGE struct gcov_var
{
- unsigned value = 0;
- unsigned ix;
- unsigned char buffer[4];
-
- if (da_file_read (buffer, 1, sizeof (buffer), file) != sizeof (buffer))
- return 1;
- for (ix = sizeof (value); ix < sizeof (buffer); ix++)
- if (buffer[ix])
- return 1;
- for (ix = 0; ix != sizeof (buffer); ix++)
- {
- value <<= 8;
- value |= buffer[ix];
- }
- *value_p = value;
- return 0;
-}
-
-/* Read *VALUE_P from coverage file FILE. Return nonzero if failed
- due to file i/o error, or range error. */
-
-static int
-gcov_read_counter (file, value_p)
- FILE *file;
- gcov_type *value_p;
-{
- gcov_type value = 0;
- unsigned ix;
- unsigned char buffer[8];
-
- if (da_file_read (buffer, 1, sizeof (buffer), file) != sizeof (buffer))
- return 1;
- for (ix = sizeof (value); ix < sizeof (buffer); ix++)
- if (buffer[ix])
- return 1;
- for (ix = 0; ix != sizeof (buffer); ix++)
- {
- value <<= 8;
- value |= buffer[ix];
- }
-
- *value_p = value;
- return value < 0;
-}
-
-#if !IN_LIBGCC2
-
-/* Read string from coverage file FILE. Length is stored in *LENGTH_P
- (if non-null), a buffer is allocated and returned in *STRING_P.
- Return nonzero if failed due to file i/o error, or range
- error. Uses xmalloc to allocate the string buffer. */
-
-static int
-gcov_read_string (file, string_p, length_p)
- FILE *file;
- char **string_p;
- unsigned *length_p;
-{
- unsigned length;
-
- if (gcov_read_unsigned (file, &length))
- return 1;
-
- if (length_p)
- *length_p = length;
- free (*string_p);
-
- *string_p = NULL;
- if (!length)
- return 0;
-
- length += 4 - (length & 3);
- *string_p = (char *) xmalloc (length);
-
- return da_file_read (*string_p, 1, length, file) != length;
-
-}
-
-#endif /* !IN_LIBGCC2 */
-
-/* Write a record length at PLACE. The current file position is the
- end of the record, and is restored before returning. Returns
- nonzero on failure. */
-
-static int
-gcov_write_length (file, place)
- FILE *file;
- long place;
-{
- long here = da_file_position (file);
- int result = (!place || da_file_seek (file, place, SEEK_SET)
- || gcov_write_unsigned (file, here - place - 4));
- if (da_file_seek (file, here, SEEK_SET))
- result = 1;
- return result;
-}
-
-#define GCOV_SUMMARY_LENGTH 44
-static int
-gcov_read_summary (da_file, summary)
- FILE *da_file;
- struct gcov_summary *summary;
-{
- return (gcov_read_unsigned (da_file, &summary->checksum)
- || gcov_read_unsigned (da_file, &summary->runs)
- || gcov_read_unsigned (da_file, &summary->arcs)
- || gcov_read_counter (da_file, &summary->arc_sum)
- || gcov_read_counter (da_file, &summary->arc_max_one)
- || gcov_read_counter (da_file, &summary->arc_max_sum)
- || gcov_read_counter (da_file, &summary->arc_sum_max));
-}
-
-#if IN_LIBGCC2
-static int
-gcov_write_summary (da_file, tag, summary)
- FILE *da_file;
- unsigned tag;
- const struct gcov_summary *summary;
-{
- long base;
-
- return (gcov_write_unsigned (da_file, tag)
- || !(base = gcov_reserve_length (da_file))
- || gcov_write_unsigned (da_file, summary->checksum)
- || gcov_write_unsigned (da_file, summary->runs)
- || gcov_write_unsigned (da_file, summary->arcs)
- || gcov_write_counter (da_file, summary->arc_sum)
- || gcov_write_counter (da_file, summary->arc_max_one)
- || gcov_write_counter (da_file, summary->arc_max_sum)
- || gcov_write_counter (da_file, summary->arc_sum_max)
- || gcov_write_length (da_file, base));
-}
+ 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 words 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. */
+ gcov_unsigned_t buffer[GCOV_BLOCK_SIZE + 1];
+#else
+ int endian; /* Swap endianness. */
+ /* Holds a variable length block, as the compiler can write
+ strings and needs to backtrack. */
+ size_t alloc;
+ gcov_unsigned_t *buffer;
#endif
-
-#if IN_LIBGCC2
-/* The kernel had problems with managing a lot of small reads/writes we use;
- the functions below are used to buffer whole file in memory, thus reading and
- writing it only once. This should be feasible, as we have this amount
- of memory for counters allocated anyway. */
-
-static FILE *actual_da_file;
-static unsigned long actual_da_file_position;
-static unsigned long actual_da_file_length;
-static char *actual_da_file_buffer;
-static unsigned long actual_da_file_buffer_size;
-
-/* Open the file NAME and return it; in EXISTED return 1 if it existed
- already. */
-static FILE *
-da_file_open (name, existed)
- const char *name;
- int *existed;
-{
-#if defined (TARGET_HAS_F_SETLKW)
- struct flock s_flock;
-
- s_flock.l_type = F_WRLCK;
- s_flock.l_whence = SEEK_SET;
- s_flock.l_start = 0;
- s_flock.l_len = 0; /* Until EOF. */
- s_flock.l_pid = getpid ();
+} gcov_var ATTRIBUTE_HIDDEN;
+
+/* 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*/) ATTRIBUTE_HIDDEN;
+#else
+GCOV_LINKAGE int gcov_open (const char */*name*/, int /*direction*/);
+GCOV_LINKAGE int gcov_magic (gcov_unsigned_t, gcov_unsigned_t);
#endif
-
- if (actual_da_file)
- return 0;
- actual_da_file_position = 0;
- if (!actual_da_file_buffer)
- {
- actual_da_file_buffer = malloc (1);
- actual_da_file_buffer_size = 1;
- }
-
- actual_da_file = fopen (name, "r+t");
- if (actual_da_file)
- *existed = 1;
- else
- {
- actual_da_file = fopen (name, "w+t");
- if (actual_da_file)
- *existed = 0;
- else
- return 0;
- }
-
-#if defined (TARGET_HAS_F_SETLKW)
- /* After a fork, another process might try to read and/or write
- the same file simultaneously. So if we can, lock the file to
- avoid race conditions. */
- while (fcntl (fileno (actual_da_file), F_SETLKW, &s_flock)
- && errno == EINTR)
- continue;
+GCOV_LINKAGE int gcov_close (void) ATTRIBUTE_HIDDEN;
+
+/* Available everywhere. */
+static gcov_position_t gcov_position (void);
+static int gcov_is_error (void);
+
+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;
+
+#if IN_LIBGCOV
+/* Available only in libgcov */
+GCOV_LINKAGE void gcov_write_counter (gcov_type) ATTRIBUTE_HIDDEN;
+GCOV_LINKAGE void gcov_write_tag_length (gcov_unsigned_t, gcov_unsigned_t)
+ ATTRIBUTE_HIDDEN;
+GCOV_LINKAGE void gcov_write_summary (gcov_unsigned_t /*tag*/,
+ const struct gcov_summary *)
+ ATTRIBUTE_HIDDEN;
+static void gcov_rewrite (void);
+GCOV_LINKAGE void gcov_seek (gcov_position_t /*position*/) ATTRIBUTE_HIDDEN;
+#else
+/* Available outside libgcov */
+GCOV_LINKAGE const char *gcov_read_string (void);
+GCOV_LINKAGE void gcov_sync (gcov_position_t /*base*/,
+ gcov_unsigned_t /*length */);
#endif
- if (*existed)
- {
- if (fseek (actual_da_file, 0, SEEK_END))
- {
- fclose (actual_da_file);
- actual_da_file = 0;
- return 0;
- }
- actual_da_file_length = ftell (actual_da_file);
- rewind (actual_da_file);
- }
- else
- actual_da_file_length = 0;
-
- if (actual_da_file_length > actual_da_file_buffer_size)
- {
- actual_da_file_buffer_size = actual_da_file_length;
- actual_da_file_buffer = realloc (actual_da_file_buffer,
- actual_da_file_buffer_size);
- if (!actual_da_file_buffer)
- {
- fclose (actual_da_file);
- actual_da_file = 0;
- return 0;
- }
- }
-
- if (*existed)
- {
- if (fread (actual_da_file_buffer, actual_da_file_length,
- 1, actual_da_file) != 1)
- {
- fclose (actual_da_file);
- actual_da_file = 0;
- return 0;
- }
- rewind (actual_da_file);
- }
-
- return actual_da_file;
-}
-
-/* Write changes to the .da file and close it. */
-static int da_file_close ()
-{
- if (!actual_da_file)
- return -1;
-
- if (fwrite (actual_da_file_buffer, actual_da_file_length,
- 1, actual_da_file) != 1)
- return da_file_error ();
-
- if (fclose (actual_da_file))
- {
- actual_da_file = 0;
- return -1;
- }
-
- actual_da_file = 0;
- return 0;
-}
-
-/* Returns current position in .da file. */
-static unsigned long
-da_file_position (file)
- FILE *file;
-{
- if (file)
- return ftell (file);
- return actual_da_file_position;
-}
+#if !IN_GCOV
+/* Available outside gcov */
+GCOV_LINKAGE void gcov_write_unsigned (gcov_unsigned_t) ATTRIBUTE_HIDDEN;
+#endif
-/* Tests whether we have reached end of .da file. */
-static int
-da_file_eof ()
-{
- return actual_da_file_position == actual_da_file_length;
-}
+#if !IN_GCOV && !IN_LIBGCOV
+/* Available only in compiler */
+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
-/* Change position in the .da file. */
-static int
-da_file_seek (file, pos, whence)
- FILE *file;
- long pos;
- int whence;
-{
- if (file)
- return fseek (file, pos, whence);
-
- if (!actual_da_file)
- return -1;
-
- switch (whence)
- {
- case SEEK_CUR:
- if (pos < 0 && (unsigned long) -pos > actual_da_file_position)
- return da_file_error ();
-
- actual_da_file_position += pos;
- break;
- case SEEK_SET:
- actual_da_file_position = pos;
- break;
- case SEEK_END:
- if ((unsigned long) -pos > actual_da_file_length)
- return da_file_error ();
- actual_da_file_position = actual_da_file_length + pos;
- }
- if (actual_da_file_position > actual_da_file_length)
- return da_file_error ();
- return 0;
-}
+#if IN_GCOV > 0
+/* Available in gcov */
+GCOV_LINKAGE time_t gcov_time (void);
+#endif
-/* Write LEN chars of DATA to actual .da file; ELTS is expected to be 1,
- FILE 0. */
-static size_t
-da_file_write (data, elts, len, file)
- const void *data;
- size_t elts;
- size_t len;
- FILE *file;
-{
- size_t l = len;
- const char *dat = data;
-
- if (file)
- return fwrite (data, elts, len, file);
-
- if (elts != 1)
- abort ();
-
- if (!actual_da_file)
- return -1;
- if (actual_da_file_position + len > actual_da_file_buffer_size)
- {
- actual_da_file_buffer_size = 2 * (actual_da_file_position + len);
- actual_da_file_buffer = realloc (actual_da_file_buffer,
- actual_da_file_buffer_size);
- if (!actual_da_file_buffer)
- return da_file_error ();
- }
- while (len--)
- actual_da_file_buffer[actual_da_file_position++] = *dat++;
- if (actual_da_file_position > actual_da_file_length)
- actual_da_file_length = actual_da_file_position;
-
- return l;
-}
+/* Save the current position in the gcov file. */
-/* Read LEN chars of DATA from actual .da file; ELTS is expected to be 1,
- FILE 0. */
-static size_t
-da_file_read (data, elts, len, file)
- void *data;
- size_t elts;
- size_t len;
- FILE *file;
+static inline gcov_position_t
+gcov_position (void)
{
- size_t l;
- char *dat = data;
-
- if (file)
- return fread (data, elts, len, file);
-
- if (elts != 1)
- abort ();
-
- if (!actual_da_file)
- return -1;
- if (actual_da_file_position + len > actual_da_file_length)
- len = actual_da_file_length - actual_da_file_position;
- l = len;
-
- while (len--)
- *dat++ = actual_da_file_buffer[actual_da_file_position++];
- return l;
+ gcc_assert (gcov_var.mode > 0);
+ return gcov_var.start + gcov_var.offset;
}
-/* Close the current .da file and report error. */
-static int
-da_file_error ()
-{
- if (actual_da_file)
- fclose (actual_da_file);
- actual_da_file = 0;
- return -1;
-}
-#else /* !IN_LIBGCC2 */
-static size_t
-da_file_write (data, elts, len, file)
- const void *data;
- size_t elts;
- size_t len;
- FILE *file;
-{
- return fwrite (data, elts, len, file);
-}
+/* Return nonzero if the error flag is set. */
-static size_t
-da_file_read (data, elts, len, file)
- void *data;
- size_t elts;
- size_t len;
- FILE *file;
+static inline int
+gcov_is_error (void)
{
- return fread (data, elts, len, file);
+ return gcov_var.file ? gcov_var.error : 1;
}
-static unsigned long
-da_file_position (file)
- FILE *file;
-{
- return ftell (file);
-}
+#if IN_LIBGCOV
+/* Move to beginning of file and initialize for writing. */
-static int
-da_file_seek (file, pos, whence)
- FILE *file;
- long pos;
- int whence;
+static inline void
+gcov_rewrite (void)
{
- return fseek (file, pos, whence);
+ gcc_assert (gcov_var.mode > 0);
+ gcov_var.mode = -1;
+ gcov_var.start = 0;
+ gcov_var.offset = 0;
+ fseek (gcov_var.file, 0L, SEEK_SET);
}
#endif
+#endif /* IN_LIBGCOV >= 0 */
+
#endif /* GCC_GCOV_IO_H */
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