-/* Machine-independent I/O routines for gcov.
- Copyright (C) 1996, 1997, 1998, 2000 Free Software Foundation, Inc.
+/* File format for coverage information
+ Copyright (C) 1996, 1997, 1998, 2000, 2002,
+ 2003, 2004, 2005 Free Software Foundation, Inc.
Contributed by Bob Manson <manson@cygnus.com>.
+ Completely remangled by Nathan Sidwell <nathan@codesourcery.com>.
This file is part of GCC.
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. */
+Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, 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 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 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.
+
+ A record has a tag, length and variable amount of data.
+
+ record: header data
+ header: int32:tag int32:length
+ data: item*
+
+ Records are not nested, but there is a record hierarchy. Tag
+ 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
+ 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
+ string:name string:source int32:lineno
+ basic_block: header int32:flags*
+ arcs: header int32:block_no arc*
+ arc: int32:dest_block int32:flags
+ lines: header int32:block_no line*
+ int32:0 string:NULL
+ line: int32:line_no | int32:0 string:filename
+
+ The BASIC_BLOCK record holds per-bb flags. The number of blocks
+ can be inferred from its data length. There is one ARCS record per
+ basic block. The number of arcs from a bb is implicit from the
+ data length. It enumerates the destination bb and per-arc flags.
+ There is one LINES record per basic block, it enumerates the source
+ lines which belong to that basic block. Source file names are
+ introduced by a line number of 0, following lines are from the new
+ source file. The initial source file for the function is NULL, but
+ the current source file should be remembered from one LINES record
+ to the next. The end of a block is indicated by an empty filename
+ - this does not reset the current source file. Note there is no
+ ordering of the ARCS and LINES records: they may be in any order,
+ interleaved in any manner. The current filename follows the order
+ the LINES records are stored in the file, *not* the ordering of the
+ blocks they are for.
+
+ The data file contains the following records.
+ data: {unit function-data* summary:object summary:program*}*
+ 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
+ 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 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 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
+ 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
-#include <stdio.h>
-#include <sys/types.h>
-static int __fetch_long PARAMS ((long *, char *, size_t)) ATTRIBUTE_UNUSED;
-static int __read_long PARAMS ((long *, FILE *, size_t)) ATTRIBUTE_UNUSED;
-static int __write_long PARAMS ((long, FILE *, size_t)) ATTRIBUTE_UNUSED;
-static int __fetch_gcov_type PARAMS ((gcov_type *, char *, size_t)) ATTRIBUTE_UNUSED;
-static int __store_gcov_type PARAMS ((gcov_type, char *, size_t)) ATTRIBUTE_UNUSED;
-static int __read_gcov_type PARAMS ((gcov_type *, FILE *, size_t)) ATTRIBUTE_UNUSED;
-static int __write_gcov_type PARAMS ((gcov_type, FILE *, size_t)) ATTRIBUTE_UNUSED;
-
-/* These routines only work for signed values. */
-
-/* Store a portable representation of VALUE in DEST using BYTES*8-1 bits.
- Return a non-zero value if VALUE requires more than BYTES*8-1 bits
- to store. */
-
-static int
-__store_gcov_type (value, dest, bytes)
- gcov_type value;
- char *dest;
- size_t bytes;
+#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 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
+
+/* File suffixes. */
+#define GCOV_DATA_SUFFIX ".gcda"
+#define GCOV_NOTE_SUFFIX ".gcno"
+
+/* 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 ((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 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)
+#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)
+#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
+ levels. */
+#define GCOV_TAG_MASK(TAG) (((TAG) - 1) ^ (TAG))
+
+/* 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)))
+
+/* Return nonzero if SUB is at a sublevel to TAG. */
+#define GCOV_TAG_IS_SUBLEVEL(TAG,SUB) \
+ (GCOV_TAG_MASK (TAG) > GCOV_TAG_MASK (SUB))
+
+/* Basic block flags. */
+#define GCOV_BLOCK_UNEXPECTED (1 << 1)
+
+/* Arc flags. */
+#define GCOV_ARC_ON_TREE (1 << 0)
+#define GCOV_ARC_FAKE (1 << 1)
+#define GCOV_ARC_FALLTHROUGH (1 << 2)
+
+/* Structured records. */
+
+/* Cumulative counter data. */
+struct gcov_ctr_summary
{
- int upper_bit = (value < 0 ? 128 : 0);
- size_t i;
-
- if (value < 0)
- {
- gcov_type oldvalue = value;
- value = -value;
- if (oldvalue != -value)
- return 1;
- }
-
- for(i = 0 ; i < (sizeof (value) < bytes ? sizeof (value) : bytes) ; i++) {
- dest[i] = value & (i == (bytes - 1) ? 127 : 255);
- value = value / 256;
- }
-
- if (value && value != -1)
- return 1;
-
- for(; i < bytes ; i++)
- dest[i] = 0;
- dest[bytes - 1] |= upper_bit;
- return 0;
-}
-
-/* Retrieve a quantity containing BYTES*8-1 bits from SOURCE and store
- the result in DEST. Returns a non-zero value if the value in SOURCE
- will not fit in DEST. */
-
-static int
-__fetch_gcov_type (dest, source, bytes)
- gcov_type *dest;
- char *source;
- size_t bytes;
+ 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
{
- gcov_type value = 0;
- int i;
-
- for (i = bytes - 1; (size_t) i > (sizeof (*dest) - 1); i--)
- if (source[i] & ((size_t) i == (bytes - 1) ? 127 : 255 ))
- return 1;
-
- for (; i >= 0; i--)
- value = value * 256 + (source[i] & ((size_t)i == (bytes - 1) ? 127 : 255));
-
- if ((source[bytes - 1] & 128) && (value > 0))
- value = - value;
-
- *dest = value;
- return 0;
-}
-
-static int
-__fetch_long (dest, source, bytes)
- long *dest;
- char *source;
- size_t bytes;
+ 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. */
+
+#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
{
- long value = 0;
- int i;
-
- for (i = bytes - 1; (size_t) i > (sizeof (*dest) - 1); i--)
- if (source[i] & ((size_t) i == (bytes - 1) ? 127 : 255 ))
- return 1;
+ gcov_unsigned_t ident; /* unique ident of function */
+ gcov_unsigned_t checksum; /* function checksum */
+ unsigned n_ctrs[0]; /* instrumented counters */
+};
- for (; i >= 0; i--)
- value = value * 256 + (source[i] & ((size_t)i == (bytes - 1) ? 127 : 255));
-
- if ((source[bytes - 1] & 128) && (value > 0))
- value = - value;
-
- *dest = value;
- return 0;
-}
+/* Type of function used to merge counters. */
+typedef void (*gcov_merge_fn) (gcov_type *, gcov_unsigned_t);
-/* Write a BYTES*8-bit quantity to FILE, portably. Returns a non-zero
- value if the write fails, or if VALUE can't be stored in BYTES*8
- bits.
-
- Note that VALUE may not actually be large enough to hold BYTES*8
- bits, but BYTES characters will be written anyway.
-
- BYTES may be a maximum of 10. */
-
-static int
-__write_gcov_type (value, file, bytes)
- gcov_type value;
- FILE *file;
- size_t bytes;
+/* Information about counters. */
+struct gcov_ctr_info
{
- char c[10];
+ gcov_unsigned_t num; /* number of counters. */
+ gcov_type *values; /* their values. */
+ gcov_merge_fn merge; /* The function used to merge them. */
+};
- if (bytes > 10 || __store_gcov_type (value, c, bytes))
- return 1;
- else
- return fwrite(c, 1, bytes, file) != bytes;
-}
-
-static int
-__write_long (value, file, bytes)
- long value;
- FILE *file;
- size_t bytes;
+/* Information about a single object file. */
+struct gcov_info
{
- char c[10];
-
- if (bytes > 10 || __store_gcov_type ((gcov_type)value, c, bytes))
- return 1;
- else
- return fwrite(c, 1, bytes, file) != bytes;
+ 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 */
+
+ 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 *) ATTRIBUTE_HIDDEN;
+
+/* Called before fork, to avoid double counting. */
+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 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);
+extern void __gcov_merge_ior (gcov_type *, unsigned);
+
+#ifndef inhibit_libc
+/* The wrappers around some library functions.. */
+extern pid_t __gcov_fork (void);
+extern int __gcov_execl (const char *, const char *, ...) ATTRIBUTE_HIDDEN;
+extern int __gcov_execlp (const char *, const char *, ...) ATTRIBUTE_HIDDEN;
+extern int __gcov_execle (const char *, const 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
+
+#endif /* IN_LIBGCOV */
+
+#if IN_LIBGCOV >= 0
+
+/* Optimum number of gcov_unsigned_t's read from or written to disk. */
+#define GCOV_BLOCK_SIZE (1 << 10)
+
+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 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
+} 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
+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 !IN_GCOV
+/* Available outside gcov */
+GCOV_LINKAGE void gcov_write_unsigned (gcov_unsigned_t) ATTRIBUTE_HIDDEN;
+#endif
+
+#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
+
+#if IN_GCOV > 0
+/* Available in gcov */
+GCOV_LINKAGE time_t gcov_time (void);
+#endif
+
+/* Save the current position in the gcov file. */
+
+static inline gcov_position_t
+gcov_position (void)
+{
+ gcc_assert (gcov_var.mode > 0);
+ return gcov_var.start + gcov_var.offset;
}
-/* Read a quantity containing BYTES bytes from FILE, portably. Return
- a non-zero value if the read fails or if the value will not fit
- in DEST.
-
- Note that DEST may not be large enough to hold all of the requested
- data, but the function will read BYTES characters anyway.
+/* Return nonzero if the error flag is set. */
- BYTES may be a maximum of 10. */
-
-static int
-__read_gcov_type (dest, file, bytes)
- gcov_type *dest;
- FILE *file;
- size_t bytes;
+static inline int
+gcov_is_error (void)
{
- char c[10];
-
- if (bytes > 10 || fread(c, 1, bytes, file) != bytes)
- return 1;
- else
- return __fetch_gcov_type (dest, c, bytes);
+ return gcov_var.file ? gcov_var.error : 1;
}
-static int
-__read_long (dest, file, bytes)
- long *dest;
- FILE *file;
- size_t bytes;
-{
- char c[10];
+#if IN_LIBGCOV
+/* Move to beginning of file and initialize for writing. */
- if (bytes > 10 || fread(c, 1, bytes, file) != bytes)
- return 1;
- else
- return __fetch_long (dest, c, bytes);
+static inline void
+gcov_rewrite (void)
+{
+ 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 */
+#endif /* GCC_GCOV_IO_H */
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