/* File format for coverage information
Copyright (C) 1996, 1997, 1998, 2000, 2002,
- 2003 Free Software Foundation, Inc.
+ 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. */
+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/>. */
-/* 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.
+ 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).
+ 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
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
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.
- data: {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 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
+ 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.
+ 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
#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
#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_HAS_F_SETLKW)
+#if defined (TARGET_POSIX_IO)
#define GCOV_LOCKED 1
#else
#define GCOV_LOCKED 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)
#endif /* !IN_LIBGCOV */
-/* 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. */
+/* 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_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
#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
/* 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 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_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_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_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))
#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_LAST_VALUE_COUNTER 4 /* The last of counters used for value
+
+#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 5
+#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"}
-
+#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_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))
by write_profile must match these. */
#if IN_LIBGCOV
+/* Information about counters for a single function. */
+struct gcov_ctr_info
+{
+ gcov_unsigned_t num; /* number of counters. */
+ gcov_type *values; /* their values. */
+};
+
/* 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. */
+ 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. */
+
struct gcov_fn_info
{
- gcov_unsigned_t ident; /* unique ident of function */
- gcov_unsigned_t checksum; /* function checksum */
- unsigned n_ctrs[0]; /* instrumented counters */
+ 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 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 stamp; /* uniquifying time stamp */
const char *filename; /* output file name */
+
+ gcov_merge_fn merge[GCOV_COUNTERS]; /* merge functions (null for
+ unused) */
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. */
+ const struct gcov_fn_info *functions[0]; /* 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);
+extern void __gcov_flush (void) ATTRIBUTE_HIDDEN;
/* The merge function that just sums the counters. */
-extern void __gcov_merge_add (gcov_type *, unsigned);
+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);
+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);
+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
+
#endif /* IN_LIBGCOV */
#if IN_LIBGCOV >= 0
size_t alloc;
gcov_unsigned_t *buffer;
#endif
-} gcov_var;
+} 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
functions for writing. Your file may become corrupted if you break
these invariants. */
#if IN_LIBGCOV
-GCOV_LINKAGE int gcov_open (const char */*name*/);
+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);
+GCOV_LINKAGE int gcov_close (void) ATTRIBUTE_HIDDEN;
/* 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 *);
+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);
-GCOV_LINKAGE void gcov_write_tag_length (gcov_unsigned_t, gcov_unsigned_t);
+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 *);
-static void gcov_truncate (void);
+ const struct gcov_summary *)
+ ATTRIBUTE_HIDDEN;
static void gcov_rewrite (void);
-GCOV_LINKAGE void gcov_seek (gcov_position_t /*position*/);
+GCOV_LINKAGE void gcov_seek (gcov_position_t /*position*/) ATTRIBUTE_HIDDEN;
#else
/* Available outside libgcov */
GCOV_LINKAGE const char *gcov_read_string (void);
#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
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. */
static inline gcov_position_t
gcov_position (void)
{
- GCOV_CHECK_READING ();
+ gcc_assert (gcov_var.mode > 0);
return gcov_var.start + gcov_var.offset;
}
-/* Return nonzero if we read to end of file. */
-
-static inline int
-gcov_is_eof (void)
-{
- return !gcov_var.overread;
-}
-
/* Return nonzero if the error flag is set. */
static inline int
static inline void
gcov_rewrite (void)
{
- GCOV_CHECK_READING ();
+ 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);
}
-
-static inline void
-gcov_truncate (void)
-{
- ftruncate (fileno (gcov_var.file), 0L);
-}
#endif
#endif /* IN_LIBGCOV >= 0 */
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