/* Routines required for instrumenting a program. */
/* Compile this one with gcc. */
/* Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
- 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
+ 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
+ Free Software Foundation, Inc.
This file is part of GCC.
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.
-In addition to the permissions in the GNU General Public License, the
-Free Software Foundation gives you unlimited permission to link the
-compiled version of this file into combinations with other programs,
-and to distribute those combinations without any restriction coming
-from the use of this file. (The General Public License restrictions
-do apply in other respects; for example, they cover modification of
-the file, and distribution when not linked into a combine
-executable.)
-
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
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.
-/* It is incorrect to include config.h here, because this file is being
- compiled for the target, and hence definitions concerning only the host
- do not apply. */
+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/>. */
#include "tconfig.h"
#include "tsystem.h"
#if GCOV_LOCKED
#include <fcntl.h>
#include <errno.h>
+#include <sys/stat.h>
#endif
#ifdef L_gcov
object file included in multiple programs. */
static gcov_unsigned_t gcov_crc32;
+/* Size of the longest file name. */
+static size_t gcov_max_filename = 0;
+
+#ifdef TARGET_POSIX_IO
+/* Make sure path component of the given FILENAME exists, create
+ missing directories. FILENAME must be writable.
+ Returns zero on success, or -1 if an error occurred. */
+
+static int
+create_file_directory (char *filename)
+{
+ char *s;
+
+ for (s = filename + 1; *s != '\0'; s++)
+ if (IS_DIR_SEPARATOR(*s))
+ {
+ char sep = *s;
+ *s = '\0';
+
+ /* Try to make directory if it doesn't already exist. */
+ if (access (filename, F_OK) == -1
+ && mkdir (filename, 0755) == -1
+ /* The directory might have been made by another process. */
+ && errno != EEXIST)
+ {
+ fprintf (stderr, "profiling:%s:Cannot create directory\n",
+ filename);
+ *s = sep;
+ return -1;
+ };
+
+ *s = sep;
+ };
+ return 0;
+}
+#endif
+
+/* Check if VERSION of the info block PTR matches libgcov one.
+ Return 1 on success, or zero in case of versions mismatch.
+ If FILENAME is not NULL, its value used for reporting purposes
+ instead of value from the info block. */
+
static int
-gcov_version (struct gcov_info *ptr, gcov_unsigned_t version)
+gcov_version (struct gcov_info *ptr, gcov_unsigned_t version,
+ const char *filename)
{
if (version != GCOV_VERSION)
{
GCOV_UNSIGNED2STRING (v, version);
GCOV_UNSIGNED2STRING (e, GCOV_VERSION);
-
+
fprintf (stderr,
"profiling:%s:Version mismatch - expected %.4s got %.4s\n",
- ptr->filename, e, v);
+ filename? filename : ptr->filename, e, v);
return 0;
}
return 1;
struct gcov_info *gi_ptr;
struct gcov_summary this_program;
struct gcov_summary all;
+ struct gcov_ctr_summary *cs_ptr;
+ const struct gcov_ctr_info *ci_ptr;
+ unsigned t_ix;
+ gcov_unsigned_t c_num;
+ const char *gcov_prefix;
+ int gcov_prefix_strip = 0;
+ size_t prefix_length;
+ char *gi_filename, *gi_filename_up;
memset (&all, 0, sizeof (all));
/* Find the totals for this execution. */
memset (&this_program, 0, sizeof (this_program));
for (gi_ptr = gcov_list; gi_ptr; gi_ptr = gi_ptr->next)
{
- const struct gcov_ctr_info *ci_ptr;
- struct gcov_ctr_summary *cs_ptr;
- unsigned t_ix;
-
- for (t_ix = 0, ci_ptr = gi_ptr->counts, cs_ptr = this_program.ctrs;
- t_ix != GCOV_COUNTERS_SUMMABLE; t_ix++, cs_ptr++)
- if ((1 << t_ix) & gi_ptr->ctr_mask)
- {
- const gcov_type *c_ptr;
- gcov_unsigned_t c_num;
+ ci_ptr = gi_ptr->counts;
+ for (t_ix = 0; t_ix < GCOV_COUNTERS_SUMMABLE; t_ix++)
+ {
+ if (!((1 << t_ix) & gi_ptr->ctr_mask))
+ continue;
- cs_ptr->num += ci_ptr->num;
- for (c_num = ci_ptr->num, c_ptr = ci_ptr->values; c_num--; c_ptr++)
- {
- cs_ptr->sum_all += *c_ptr;
- if (cs_ptr->run_max < *c_ptr)
- cs_ptr->run_max = *c_ptr;
- }
- ci_ptr++;
- }
+ cs_ptr = &this_program.ctrs[t_ix];
+ cs_ptr->num += ci_ptr->num;
+ for (c_num = 0; c_num < ci_ptr->num; c_num++)
+ {
+ cs_ptr->sum_all += ci_ptr->values[c_num];
+ if (cs_ptr->run_max < ci_ptr->values[c_num])
+ cs_ptr->run_max = ci_ptr->values[c_num];
+ }
+ ci_ptr++;
+ }
+ }
+
+ /* Get file name relocation prefix. Non-absolute values are ignored. */
+ gcov_prefix = getenv("GCOV_PREFIX");
+ if (gcov_prefix && IS_ABSOLUTE_PATH (gcov_prefix))
+ {
+ /* Check if the level of dirs to strip off specified. */
+ char *tmp = getenv("GCOV_PREFIX_STRIP");
+ if (tmp)
+ {
+ gcov_prefix_strip = atoi (tmp);
+ /* Do not consider negative values. */
+ if (gcov_prefix_strip < 0)
+ gcov_prefix_strip = 0;
+ }
+
+ prefix_length = strlen(gcov_prefix);
+
+ /* Remove an unnecessary trailing '/' */
+ if (IS_DIR_SEPARATOR (gcov_prefix[prefix_length - 1]))
+ prefix_length--;
}
+ else
+ prefix_length = 0;
+
+ /* Allocate and initialize the filename scratch space. */
+ gi_filename = (char *) alloca (prefix_length + gcov_max_filename + 1);
+ if (prefix_length)
+ memcpy (gi_filename, gcov_prefix, prefix_length);
+ gi_filename_up = gi_filename + prefix_length;
/* Now merge each file. */
for (gi_ptr = gcov_list; gi_ptr; gi_ptr = gi_ptr->next)
gcov_type *values[GCOV_COUNTERS];
const struct gcov_fn_info *fi_ptr;
unsigned fi_stride;
- unsigned c_ix, t_ix, f_ix;
- const struct gcov_ctr_info *ci_ptr;
- struct gcov_ctr_summary *cs_ptr;
+ unsigned c_ix, f_ix, n_counts;
struct gcov_ctr_summary *cs_obj, *cs_tobj, *cs_prg, *cs_tprg, *cs_all;
int error = 0;
gcov_unsigned_t tag, length;
gcov_position_t summary_pos = 0;
+ gcov_position_t eof_pos = 0;
memset (&this_object, 0, sizeof (this_object));
memset (&object, 0, sizeof (object));
-
+
+ /* Build relocated filename, stripping off leading
+ directories from the initial filename if requested. */
+ if (gcov_prefix_strip > 0)
+ {
+ int level = 0;
+ const char *fname = gi_ptr->filename;
+ const char *s;
+
+ /* Skip selected directory levels. */
+ for (s = fname + 1; (*s != '\0') && (level < gcov_prefix_strip); s++)
+ if (IS_DIR_SEPARATOR(*s))
+ {
+ fname = s;
+ level++;
+ };
+
+ /* Update complete filename with stripped original. */
+ strcpy (gi_filename_up, fname);
+ }
+ else
+ strcpy (gi_filename_up, gi_ptr->filename);
+
/* Totals for this object file. */
- for (t_ix = c_ix = 0,
- ci_ptr = gi_ptr->counts, cs_ptr = this_object.ctrs;
- t_ix != GCOV_COUNTERS_SUMMABLE; t_ix++, cs_ptr++)
+ ci_ptr = gi_ptr->counts;
+ for (t_ix = 0; t_ix < GCOV_COUNTERS_SUMMABLE; t_ix++)
+ {
+ if (!((1 << t_ix) & gi_ptr->ctr_mask))
+ continue;
+
+ cs_ptr = &this_object.ctrs[t_ix];
+ cs_ptr->num += ci_ptr->num;
+ for (c_num = 0; c_num < ci_ptr->num; c_num++)
+ {
+ cs_ptr->sum_all += ci_ptr->values[c_num];
+ if (cs_ptr->run_max < ci_ptr->values[c_num])
+ cs_ptr->run_max = ci_ptr->values[c_num];
+ }
+
+ ci_ptr++;
+ }
+
+ c_ix = 0;
+ for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++)
if ((1 << t_ix) & gi_ptr->ctr_mask)
{
- const gcov_type *c_ptr;
- gcov_unsigned_t c_num;
-
- cs_ptr->num += ci_ptr->num;
- values[c_ix] = ci_ptr->values;
- for (c_num = ci_ptr->num, c_ptr = ci_ptr->values; c_num--; c_ptr++)
- {
- cs_ptr->sum_all += *c_ptr;
- if (cs_ptr->run_max < *c_ptr)
- cs_ptr->run_max = *c_ptr;
- }
+ values[c_ix] = gi_ptr->counts[c_ix].values;
c_ix++;
- ci_ptr++;
}
/* Calculate the function_info stride. This depends on the
fi_stride += __alignof__ (struct gcov_fn_info) - 1;
fi_stride &= ~(__alignof__ (struct gcov_fn_info) - 1);
}
-
- if (!gcov_open (gi_ptr->filename))
+
+ if (!gcov_open (gi_filename))
{
- fprintf (stderr, "profiling:%s:Cannot open\n", gi_ptr->filename);
- continue;
+#ifdef TARGET_POSIX_IO
+ /* Open failed likely due to missed directory.
+ Create directory and retry to open file. */
+ if (create_file_directory (gi_filename))
+ {
+ fprintf (stderr, "profiling:%s:Skip\n", gi_filename);
+ continue;
+ }
+#endif
+ if (!gcov_open (gi_filename))
+ {
+ fprintf (stderr, "profiling:%s:Cannot open\n", gi_filename);
+ continue;
+ }
}
tag = gcov_read_unsigned ();
if (tag != GCOV_DATA_MAGIC)
{
fprintf (stderr, "profiling:%s:Not a gcov data file\n",
- gi_ptr->filename);
- read_fatal:;
- gcov_close ();
- continue;
+ gi_filename);
+ goto read_fatal;
}
length = gcov_read_unsigned ();
- if (!gcov_version (gi_ptr, length))
+ if (!gcov_version (gi_ptr, length, gi_filename))
goto read_fatal;
length = gcov_read_unsigned ();
if (length != gi_ptr->stamp)
- {
- /* Read from a different compilation. Overwrite the
- file. */
- gcov_truncate ();
- goto rewrite;
- }
-
+ /* Read from a different compilation. Overwrite the file. */
+ goto rewrite;
+
/* Merge execution counts for each function. */
- for (f_ix = gi_ptr->n_functions, fi_ptr = gi_ptr->functions;
- f_ix--;
- fi_ptr = (const struct gcov_fn_info *)
- ((const char *) fi_ptr + fi_stride))
+ for (f_ix = 0; f_ix < gi_ptr->n_functions; f_ix++)
{
+ fi_ptr = (const struct gcov_fn_info *)
+ ((const char *) gi_ptr->functions + f_ix * fi_stride);
tag = gcov_read_unsigned ();
length = gcov_read_unsigned ();
{
read_mismatch:;
fprintf (stderr, "profiling:%s:Merge mismatch for %s\n",
- gi_ptr->filename,
+ gi_filename,
f_ix + 1 ? "function" : "summaries");
goto read_fatal;
}
- for (c_ix = t_ix = 0; t_ix != GCOV_COUNTERS; t_ix++)
- if ((1 << t_ix) & gi_ptr->ctr_mask)
- {
- unsigned n_counts = fi_ptr->n_ctrs[c_ix];
- gcov_merge_fn merge = gi_ptr->counts[c_ix].merge;
-
- tag = gcov_read_unsigned ();
- length = gcov_read_unsigned ();
- if (tag != GCOV_TAG_FOR_COUNTER (t_ix)
- || length != GCOV_TAG_COUNTER_LENGTH (n_counts))
- goto read_mismatch;
- (*merge) (values[c_ix], n_counts);
- values[c_ix] += n_counts;
- c_ix++;
+ c_ix = 0;
+ for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++)
+ {
+ gcov_merge_fn merge;
+
+ if (!((1 << t_ix) & gi_ptr->ctr_mask))
+ continue;
+
+ n_counts = fi_ptr->n_ctrs[c_ix];
+ merge = gi_ptr->counts[c_ix].merge;
+
+ tag = gcov_read_unsigned ();
+ length = gcov_read_unsigned ();
+ if (tag != GCOV_TAG_FOR_COUNTER (t_ix)
+ || length != GCOV_TAG_COUNTER_LENGTH (n_counts))
+ goto read_mismatch;
+ (*merge) (values[c_ix], n_counts);
+ values[c_ix] += n_counts;
+ c_ix++;
}
if ((error = gcov_is_error ()))
goto read_error;
}
+ f_ix = ~0u;
/* Check program & object summary */
while (1)
{
- gcov_position_t base = gcov_position ();
int is_program;
-
+
+ eof_pos = gcov_position ();
tag = gcov_read_unsigned ();
if (!tag)
break;
+
length = gcov_read_unsigned ();
is_program = tag == GCOV_TAG_PROGRAM_SUMMARY;
if (length != GCOV_TAG_SUMMARY_LENGTH
goto read_error;
if (is_program && program.checksum == gcov_crc32)
{
- summary_pos = base;
+ summary_pos = eof_pos;
goto rewrite;
}
}
}
-
- if (!gcov_is_eof ())
- {
- read_error:;
- fprintf (stderr, error < 0 ? "profiling:%s:Overflow merging\n"
- : "profiling:%s:Error merging\n", gi_ptr->filename);
- goto read_fatal;
- }
+ goto rewrite;
+
+ read_error:;
+ fprintf (stderr, error < 0 ? "profiling:%s:Overflow merging\n"
+ : "profiling:%s:Error merging\n", gi_filename);
+
+ read_fatal:;
+ gcov_close ();
+ continue;
+
rewrite:;
gcov_rewrite ();
if (!summary_pos)
/* Merge the summaries. */
f_ix = ~0u;
- for (t_ix = c_ix = 0,
- cs_obj = object.ctrs, cs_tobj = this_object.ctrs,
- cs_prg = program.ctrs, cs_tprg = this_program.ctrs,
- cs_all = all.ctrs;
- t_ix != GCOV_COUNTERS_SUMMABLE;
- t_ix++, cs_obj++, cs_tobj++, cs_prg++, cs_tprg++, cs_all++)
+ for (t_ix = 0; t_ix < GCOV_COUNTERS_SUMMABLE; t_ix++)
{
+ cs_obj = &object.ctrs[t_ix];
+ cs_tobj = &this_object.ctrs[t_ix];
+ cs_prg = &program.ctrs[t_ix];
+ cs_tprg = &this_program.ctrs[t_ix];
+ cs_all = &all.ctrs[t_ix];
+
if ((1 << t_ix) & gi_ptr->ctr_mask)
{
if (!cs_obj->runs++)
if (cs_obj->run_max < cs_tobj->run_max)
cs_obj->run_max = cs_tobj->run_max;
cs_obj->sum_max += cs_tobj->run_max;
-
+
if (!cs_prg->runs++)
cs_prg->num = cs_tprg->num;
else if (cs_prg->num != cs_tprg->num)
if (cs_prg->run_max < cs_tprg->run_max)
cs_prg->run_max = cs_tprg->run_max;
cs_prg->sum_max += cs_tprg->run_max;
-
- values[c_ix] = gi_ptr->counts[c_ix].values;
- c_ix++;
}
else if (cs_obj->num || cs_prg->num)
goto read_mismatch;
-
+
if (!cs_all->runs && cs_prg->runs)
memcpy (cs_all, cs_prg, sizeof (*cs_all));
else if (!all.checksum
&& memcmp (cs_all, cs_prg, sizeof (*cs_all)))
{
fprintf (stderr, "profiling:%s:Invocation mismatch - some data files may have been removed%s",
- gi_ptr->filename, GCOV_LOCKED
+ gi_filename, GCOV_LOCKED
? "" : " or concurrent update without locking support");
all.checksum = ~0u;
}
}
-
+
+ c_ix = 0;
+ for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++)
+ if ((1 << t_ix) & gi_ptr->ctr_mask)
+ {
+ values[c_ix] = gi_ptr->counts[c_ix].values;
+ c_ix++;
+ }
+
program.checksum = gcov_crc32;
-
+
/* Write out the data. */
gcov_write_tag_length (GCOV_DATA_MAGIC, GCOV_VERSION);
gcov_write_unsigned (gi_ptr->stamp);
-
+
/* Write execution counts for each function. */
- for (f_ix = gi_ptr->n_functions, fi_ptr = gi_ptr->functions; f_ix--;
- fi_ptr = (const struct gcov_fn_info *)
- ((const char *) fi_ptr + fi_stride))
+ for (f_ix = 0; f_ix < gi_ptr->n_functions; f_ix++)
{
+ fi_ptr = (const struct gcov_fn_info *)
+ ((const char *) gi_ptr->functions + f_ix * fi_stride);
+
/* Announce function. */
gcov_write_tag_length (GCOV_TAG_FUNCTION, GCOV_TAG_FUNCTION_LENGTH);
gcov_write_unsigned (fi_ptr->ident);
gcov_write_unsigned (fi_ptr->checksum);
- for (c_ix = t_ix = 0; t_ix != GCOV_COUNTERS; t_ix++)
- if ((1 << t_ix) & gi_ptr->ctr_mask)
- {
- unsigned n_counts = fi_ptr->n_ctrs[c_ix];
- gcov_type *c_ptr;
-
- gcov_write_tag_length (GCOV_TAG_FOR_COUNTER (t_ix),
- GCOV_TAG_COUNTER_LENGTH (n_counts));
- c_ptr = values[c_ix];
- while (n_counts--)
- gcov_write_counter (*c_ptr++);
- values[c_ix] = c_ptr;
- c_ix++;
- }
+ c_ix = 0;
+ for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++)
+ {
+ gcov_type *c_ptr;
+
+ if (!((1 << t_ix) & gi_ptr->ctr_mask))
+ continue;
+
+ n_counts = fi_ptr->n_ctrs[c_ix];
+
+ gcov_write_tag_length (GCOV_TAG_FOR_COUNTER (t_ix),
+ GCOV_TAG_COUNTER_LENGTH (n_counts));
+ c_ptr = values[c_ix];
+ while (n_counts--)
+ gcov_write_counter (*c_ptr++);
+
+ values[c_ix] = c_ptr;
+ c_ix++;
+ }
}
/* Object file summary. */
gcov_write_summary (GCOV_TAG_OBJECT_SUMMARY, &object);
/* Generate whole program statistics. */
- gcov_seek (summary_pos);
+ if (eof_pos)
+ gcov_seek (eof_pos);
gcov_write_summary (GCOV_TAG_PROGRAM_SUMMARY, &program);
+ if (!summary_pos)
+ gcov_write_unsigned (0);
if ((error = gcov_close ()))
fprintf (stderr, error < 0 ?
"profiling:%s:Overflow writing\n" :
"profiling:%s:Error writing\n",
- gi_ptr->filename);
+ gi_filename);
}
}
{
if (!info->version)
return;
- if (gcov_version (info, info->version))
+ if (gcov_version (info, info->version, 0))
{
const char *ptr = info->filename;
gcov_unsigned_t crc32 = gcov_crc32;
-
+ size_t filename_length = strlen(info->filename);
+
+ /* Refresh the longest file name information */
+ if (filename_length > gcov_max_filename)
+ gcov_max_filename = filename_length;
+
do
{
unsigned ix;
}
}
while (*ptr++);
-
+
gcov_crc32 = crc32;
-
+
if (!gcov_list)
atexit (gcov_exit);
-
+
info->next = gcov_list;
gcov_list = info;
}
{
unsigned t_ix;
const struct gcov_ctr_info *ci_ptr;
-
+
for (t_ix = 0, ci_ptr = gi_ptr->counts; t_ix != GCOV_COUNTERS; t_ix++)
if ((1 << t_ix) & gi_ptr->ctr_mask)
{
}
#endif /* L_gcov_merge_add */
+#ifdef L_gcov_merge_ior
+/* The profile merging function that just adds the counters. It is given
+ an array COUNTERS of N_COUNTERS old counters and it reads the same number
+ of counters from the gcov file. */
+void
+__gcov_merge_ior (gcov_type *counters, unsigned n_counters)
+{
+ for (; n_counters; counters++, n_counters--)
+ *counters |= gcov_read_counter ();
+}
+#endif
+
#ifdef L_gcov_merge_single
/* The profile merging function for choosing the most common value.
It is given an array COUNTERS of N_COUNTERS old counters and it
reads the same number of counters from the gcov file. The counters
are split into 3-tuples where the members of the tuple have
meanings:
-
+
-- the stored candidate on the most common value of the measured entity
-- counter
-- total number of evaluations of the value */
unsigned i, n_measures;
gcov_type value, counter, all;
- GCOV_CHECK (!(n_counters % 3));
+ gcc_assert (!(n_counters % 3));
n_measures = n_counters / 3;
for (i = 0; i < n_measures; i++, counters += 3)
{
given an array COUNTERS of N_COUNTERS old counters and it reads the
same number of counters from the gcov file. The counters are split
into 4-tuples where the members of the tuple have meanings:
-
+
-- the last value of the measured entity
-- the stored candidate on the most common difference
-- counter
__gcov_merge_delta (gcov_type *counters, unsigned n_counters)
{
unsigned i, n_measures;
- gcov_type last, value, counter, all;
+ gcov_type value, counter, all;
- GCOV_CHECK (!(n_counters % 4));
+ gcc_assert (!(n_counters % 4));
n_measures = n_counters / 4;
for (i = 0; i < n_measures; i++, counters += 4)
{
- last = gcov_read_counter ();
+ /* last = */ gcov_read_counter ();
value = gcov_read_counter ();
counter = gcov_read_counter ();
all = gcov_read_counter ();
}
#endif /* L_gcov_merge_delta */
+#ifdef L_gcov_interval_profiler
+/* If VALUE is in interval <START, START + STEPS - 1>, then increases the
+ corresponding counter in COUNTERS. If the VALUE is above or below
+ the interval, COUNTERS[STEPS] or COUNTERS[STEPS + 1] is increased
+ instead. */
+
+void
+__gcov_interval_profiler (gcov_type *counters, gcov_type value,
+ int start, unsigned steps)
+{
+ gcov_type delta = value - start;
+ if (delta < 0)
+ counters[steps + 1]++;
+ else if (delta >= steps)
+ counters[steps]++;
+ else
+ counters[delta]++;
+}
+#endif
+
+#ifdef L_gcov_pow2_profiler
+/* If VALUE is a power of two, COUNTERS[1] is incremented. Otherwise
+ COUNTERS[0] is incremented. */
+
+void
+__gcov_pow2_profiler (gcov_type *counters, gcov_type value)
+{
+ if (value & (value - 1))
+ counters[0]++;
+ else
+ counters[1]++;
+}
+#endif
+
+/* Tries to determine the most common value among its inputs. Checks if the
+ value stored in COUNTERS[0] matches VALUE. If this is the case, COUNTERS[1]
+ is incremented. If this is not the case and COUNTERS[1] is not zero,
+ COUNTERS[1] is decremented. Otherwise COUNTERS[1] is set to one and
+ VALUE is stored to COUNTERS[0]. This algorithm guarantees that if this
+ function is called more than 50% of the time with one value, this value
+ will be in COUNTERS[0] in the end.
+
+ In any case, COUNTERS[2] is incremented. */
+
+static inline void
+__gcov_one_value_profiler_body (gcov_type *counters, gcov_type value)
+{
+ if (value == counters[0])
+ counters[1]++;
+ else if (counters[1] == 0)
+ {
+ counters[1] = 1;
+ counters[0] = value;
+ }
+ else
+ counters[1]--;
+ counters[2]++;
+}
+
+#ifdef L_gcov_one_value_profiler
+void
+__gcov_one_value_profiler (gcov_type *counters, gcov_type value)
+{
+ __gcov_one_value_profiler_body (counters, value);
+}
+#endif
+
+#ifdef L_gcov_indirect_call_profiler
+/* Tries to determine the most common value among its inputs. */
+void
+__gcov_indirect_call_profiler (gcov_type* counter, gcov_type value,
+ void* cur_func, void* callee_func)
+{
+ /* If the C++ virtual tables contain function descriptors then one
+ function may have multiple descriptors and we need to dereference
+ the descriptors to see if they point to the same function. */
+ if (cur_func == callee_func
+ || (TARGET_VTABLE_USES_DESCRIPTORS && callee_func
+ && *(void **) cur_func == *(void **) callee_func))
+ __gcov_one_value_profiler_body (counter, value);
+}
+#endif
+
+
+#ifdef L_gcov_average_profiler
+/* Increase corresponding COUNTER by VALUE. FIXME: Perhaps we want
+ to saturate up. */
+
+void
+__gcov_average_profiler (gcov_type *counters, gcov_type value)
+{
+ counters[0] += value;
+ counters[1] ++;
+}
+#endif
+
+#ifdef L_gcov_ior_profiler
+/* Increase corresponding COUNTER by VALUE. FIXME: Perhaps we want
+ to saturate up. */
+
+void
+__gcov_ior_profiler (gcov_type *counters, gcov_type value)
+{
+ *counters |= value;
+}
+#endif
+
+#ifdef L_gcov_fork
+/* A wrapper for the fork function. Flushes the accumulated profiling data, so
+ that they are not counted twice. */
+
+pid_t
+__gcov_fork (void)
+{
+ __gcov_flush ();
+ return fork ();
+}
+#endif
+
+#ifdef L_gcov_execl
+/* A wrapper for the execl function. Flushes the accumulated profiling data, so
+ that they are not lost. */
+
+int
+__gcov_execl (const char *path, char *arg, ...)
+{
+ va_list ap, aq;
+ unsigned i, length;
+ char **args;
+
+ __gcov_flush ();
+
+ va_start (ap, arg);
+ va_copy (aq, ap);
+
+ length = 2;
+ while (va_arg (ap, char *))
+ length++;
+ va_end (ap);
+
+ args = (char **) alloca (length * sizeof (void *));
+ args[0] = arg;
+ for (i = 1; i < length; i++)
+ args[i] = va_arg (aq, char *);
+ va_end (aq);
+
+ return execv (path, args);
+}
+#endif
+
+#ifdef L_gcov_execlp
+/* A wrapper for the execlp function. Flushes the accumulated profiling data, so
+ that they are not lost. */
+
+int
+__gcov_execlp (const char *path, char *arg, ...)
+{
+ va_list ap, aq;
+ unsigned i, length;
+ char **args;
+
+ __gcov_flush ();
+
+ va_start (ap, arg);
+ va_copy (aq, ap);
+
+ length = 2;
+ while (va_arg (ap, char *))
+ length++;
+ va_end (ap);
+
+ args = (char **) alloca (length * sizeof (void *));
+ args[0] = arg;
+ for (i = 1; i < length; i++)
+ args[i] = va_arg (aq, char *);
+ va_end (aq);
+
+ return execvp (path, args);
+}
+#endif
+
+#ifdef L_gcov_execle
+/* A wrapper for the execle function. Flushes the accumulated profiling data, so
+ that they are not lost. */
+
+int
+__gcov_execle (const char *path, char *arg, ...)
+{
+ va_list ap, aq;
+ unsigned i, length;
+ char **args;
+ char **envp;
+
+ __gcov_flush ();
+
+ va_start (ap, arg);
+ va_copy (aq, ap);
+
+ length = 2;
+ while (va_arg (ap, char *))
+ length++;
+ va_end (ap);
+
+ args = (char **) alloca (length * sizeof (void *));
+ args[0] = arg;
+ for (i = 1; i < length; i++)
+ args[i] = va_arg (aq, char *);
+ envp = va_arg (aq, char **);
+ va_end (aq);
+
+ return execve (path, args, envp);
+}
+#endif
+
+#ifdef L_gcov_execv
+/* A wrapper for the execv function. Flushes the accumulated profiling data, so
+ that they are not lost. */
+
+int
+__gcov_execv (const char *path, char *const argv[])
+{
+ __gcov_flush ();
+ return execv (path, argv);
+}
+#endif
+
+#ifdef L_gcov_execvp
+/* A wrapper for the execvp function. Flushes the accumulated profiling data, so
+ that they are not lost. */
+
+int
+__gcov_execvp (const char *path, char *const argv[])
+{
+ __gcov_flush ();
+ return execvp (path, argv);
+}
+#endif
+
+#ifdef L_gcov_execve
+/* A wrapper for the execve function. Flushes the accumulated profiling data, so
+ that they are not lost. */
+
+int
+__gcov_execve (const char *path, char *const argv[], char *const envp[])
+{
+ __gcov_flush ();
+ return execve (path, argv, envp);
+}
+#endif
#endif /* inhibit_libc */
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