/* 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"
#include "coretypes.h"
#include "tm.h"
+#if defined(inhibit_libc)
+#define IN_LIBGCOV (-1)
+#else
#undef NULL /* Avoid errors if stdio.h and our stddef.h mismatch. */
#include <stdio.h>
+#define IN_LIBGCOV 1
+#if defined(L_gcov)
+#define GCOV_LINKAGE /* nothing */
+#endif
+#endif
+#include "gcov-io.h"
+
+#if defined(inhibit_libc)
+/* If libc and its header files are not available, provide dummy functions. */
+
+#ifdef L_gcov
+void __gcov_init (struct gcov_info *p __attribute__ ((unused))) {}
+void __gcov_flush (void) {}
+#endif
+
+#ifdef L_gcov_merge_add
+void __gcov_merge_add (gcov_type *counters __attribute__ ((unused)),
+ unsigned n_counters __attribute__ ((unused))) {}
+#endif
+
+#ifdef L_gcov_merge_single
+void __gcov_merge_single (gcov_type *counters __attribute__ ((unused)),
+ unsigned n_counters __attribute__ ((unused))) {}
+#endif
+
+#ifdef L_gcov_merge_delta
+void __gcov_merge_delta (gcov_type *counters __attribute__ ((unused)),
+ unsigned n_counters __attribute__ ((unused))) {}
+#endif
+
+#else
#include <string.h>
-#if defined (TARGET_HAS_F_SETLKW)
+#if GCOV_LOCKED
#include <fcntl.h>
#include <errno.h>
+#include <sys/stat.h>
#endif
-#include "gcov-io.h"
+
+#ifdef L_gcov
+#include "gcov-io.c"
/* Chain of per-object gcov structures. */
static struct gcov_info *gcov_list;
/* A program checksum allows us to distinguish program data for an
object file included in multiple programs. */
-static unsigned gcov_crc32;
+static gcov_unsigned_t gcov_crc32;
-static void
-gcov_version_mismatch (struct gcov_info *ptr, unsigned version)
+/* 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)
{
- unsigned expected = GCOV_VERSION;
- unsigned ix;
- char e[4], v[4];
+ char *s;
- for (ix = 4; ix--; expected >>= 8, version >>= 8)
+ 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,
+ const char *filename)
+{
+ if (version != GCOV_VERSION)
{
- e[ix] = expected;
- v[ix] = version;
+ char v[4], e[4];
+
+ GCOV_UNSIGNED2STRING (v, version);
+ GCOV_UNSIGNED2STRING (e, GCOV_VERSION);
+
+ fprintf (stderr,
+ "profiling:%s:Version mismatch - expected %.4s got %.4s\n",
+ filename? filename : ptr->filename, e, v);
+ return 0;
}
-
- fprintf (stderr,
- "profiling:%s:Version mismatch - expected %.4s got %.4s\n",
- ptr->filename, e, v);
+ return 1;
}
/* Dump the coverage counts. We merge with existing counts when
static void
gcov_exit (void)
{
- struct gcov_info *ptr;
- unsigned ix, jx;
- struct gcov_summary program;
- gcov_type program_max_one = 0;
- gcov_type program_max_sum = 0;
- gcov_type program_sum = 0;
- unsigned program_arcs = 0;
-
-#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 ();
-#endif
-
- memset (&program, 0, sizeof (program));
- program.checksum = gcov_crc32;
-
- for (ptr = gcov_list; ptr; ptr = ptr->next)
+ 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)
{
- struct gcov_summary object;
- struct gcov_summary local_prg;
- int merging = 0;
- long base;
- const struct function_info *fn_info;
- gcov_type **counters;
- gcov_type *count_ptr;
- gcov_type object_max_one = 0;
- gcov_type count;
- unsigned tag, length, flength, checksum;
- unsigned arc_data_index, f_sect_index, sect_index;
-
- ptr->wkspc = 0;
- if (!ptr->filename)
- continue;
-
- counters = malloc (sizeof (gcov_type *) * ptr->n_counter_sections);
- for (ix = 0; ix < ptr->n_counter_sections; ix++)
- counters[ix] = ptr->counter_sections[ix].counters;
-
- for (arc_data_index = 0;
- arc_data_index < ptr->n_counter_sections
- && ptr->counter_sections[arc_data_index].tag != GCOV_TAG_ARC_COUNTS;
- arc_data_index++)
- continue;
-
- if (arc_data_index == ptr->n_counter_sections)
- {
- /* For now; later we may want to just measure other profiles,
- but now I am lazy to check for all consequences. */
- abort ();
- }
- for (ix = ptr->counter_sections[arc_data_index].n_counters,
- count_ptr = ptr->counter_sections[arc_data_index].counters; ix--;)
+ ci_ptr = gi_ptr->counts;
+ for (t_ix = 0; t_ix < GCOV_COUNTERS_SUMMABLE; t_ix++)
{
- gcov_type count = *count_ptr++;
+ if (!((1 << t_ix) & gi_ptr->ctr_mask))
+ continue;
- if (count > object_max_one)
- object_max_one = count;
+ 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++;
}
- if (object_max_one > program_max_one)
- program_max_one = object_max_one;
+ }
+
+ /* 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;
+ }
- memset (&local_prg, 0, sizeof (local_prg));
+ 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)
+ {
+ struct gcov_summary this_object;
+ struct gcov_summary object, program;
+ gcov_type *values[GCOV_COUNTERS];
+ const struct gcov_fn_info *fi_ptr;
+ unsigned fi_stride;
+ 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));
- /* Open for modification */
- if (!da_file_open (ptr->filename, &merging))
+ /* 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. */
+ ci_ptr = gi_ptr->counts;
+ for (t_ix = 0; t_ix < GCOV_COUNTERS_SUMMABLE; t_ix++)
{
- fprintf (stderr, "profiling:%s:Cannot open\n", ptr->filename);
- ptr->filename = 0;
- continue;
+ 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++;
}
- if (merging)
+ 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++;
+ }
+
+ /* Calculate the function_info stride. This depends on the
+ number of counter types being measured. */
+ fi_stride = sizeof (struct gcov_fn_info) + c_ix * sizeof (unsigned);
+ if (__alignof__ (struct gcov_fn_info) > sizeof (unsigned))
{
- /* Merge data from file. */
-
- if (gcov_read_unsigned (0, &tag) || tag != GCOV_DATA_MAGIC)
+ fi_stride += __alignof__ (struct gcov_fn_info) - 1;
+ fi_stride &= ~(__alignof__ (struct gcov_fn_info) - 1);
+ }
+
+ if (!gcov_open (gi_filename))
+ {
+#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:Not a gcov data file\n",
- ptr->filename);
- read_fatal:;
- da_file_close ();
- ptr->filename = 0;
+ fprintf (stderr, "profiling:%s:Skip\n", gi_filename);
continue;
}
- if (gcov_read_unsigned (0, &length) || length != GCOV_VERSION)
+#endif
+ if (!gcov_open (gi_filename))
{
- gcov_version_mismatch (ptr, length);
+ fprintf (stderr, "profiling:%s:Cannot open\n", gi_filename);
+ continue;
+ }
+ }
+
+ tag = gcov_read_unsigned ();
+ if (tag)
+ {
+ /* Merge data from file. */
+ if (tag != GCOV_DATA_MAGIC)
+ {
+ fprintf (stderr, "profiling:%s:Not a gcov data file\n",
+ gi_filename);
goto read_fatal;
}
+ length = gcov_read_unsigned ();
+ 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. */
+ goto rewrite;
/* Merge execution counts for each function. */
- for (ix = ptr->n_functions, fn_info = ptr->functions;
- ix--; fn_info++)
+ for (f_ix = 0; f_ix < gi_ptr->n_functions; f_ix++)
{
- if (gcov_read_unsigned (0, &tag)
- || gcov_read_unsigned (0, &length))
- {
- read_error:;
- fprintf (stderr, "profiling:%s:Error merging\n",
- ptr->filename);
- goto read_fatal;
- }
-
- /* Check function */
- if (tag != GCOV_TAG_FUNCTION)
+ fi_ptr = (const struct gcov_fn_info *)
+ ((const char *) gi_ptr->functions + f_ix * fi_stride);
+ tag = gcov_read_unsigned ();
+ length = gcov_read_unsigned ();
+
+ /* Check function. */
+ if (tag != GCOV_TAG_FUNCTION
+ || length != GCOV_TAG_FUNCTION_LENGTH
+ || gcov_read_unsigned () != fi_ptr->ident
+ || gcov_read_unsigned () != fi_ptr->checksum)
{
read_mismatch:;
- fprintf (stderr, "profiling:%s:Merge mismatch at %s\n",
- ptr->filename, fn_info->name);
+ fprintf (stderr, "profiling:%s:Merge mismatch for %s\n",
+ gi_filename,
+ f_ix + 1 ? "function" : "summaries");
goto read_fatal;
}
- if (gcov_read_unsigned (0, &flength)
- || gcov_skip_string (0, flength)
- || gcov_read_unsigned (0, &checksum))
- goto read_error;
- if (flength != strlen (fn_info->name)
- || checksum != fn_info->checksum)
- goto read_mismatch;
-
- /* Counters. */
- for (f_sect_index = 0;
- f_sect_index < fn_info->n_counter_sections;
- f_sect_index++)
+ c_ix = 0;
+ for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++)
{
- unsigned n_counters;
-
- if (gcov_read_unsigned (0, &tag)
- || gcov_read_unsigned (0, &length))
- goto read_error;
- for (sect_index = 0;
- sect_index < ptr->n_counter_sections;
- sect_index++)
- if (ptr->counter_sections[sect_index].tag == tag)
- break;
- if (sect_index == ptr->n_counter_sections
- || fn_info->counter_sections[f_sect_index].tag != tag)
- goto read_mismatch;
-
- n_counters = fn_info->counter_sections[f_sect_index].n_counters;
- if (n_counters != length / 8)
+ 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;
-
- for (jx = 0; jx < n_counters; jx++)
- if (gcov_read_counter (0, &count))
- goto read_error;
- else
- counters[sect_index][jx] += count;
- counters[sect_index] += n_counters;
+ (*merge) (values[c_ix], n_counts);
+ values[c_ix] += n_counts;
+ c_ix++;
}
+ if ((error = gcov_is_error ()))
+ goto read_error;
}
- /* Check object summary */
- if (gcov_read_unsigned (0, &tag)
- || gcov_read_unsigned (0, &length))
- goto read_error;
- if (tag != GCOV_TAG_OBJECT_SUMMARY)
- goto read_mismatch;
- if (gcov_read_summary (0, &object))
- goto read_error;
-
- /* Check program summary */
+ f_ix = ~0u;
+ /* Check program & object summary */
while (1)
{
- long base = da_file_position (0);
+ int is_program;
- if (gcov_read_unsigned (0, &tag)
- || gcov_read_unsigned (0, &length))
- {
- if (da_file_eof ())
- break;
- goto read_error;
- }
- if (tag != GCOV_TAG_PROGRAM_SUMMARY
- && tag != GCOV_TAG_PLACEHOLDER_SUMMARY
- && tag != GCOV_TAG_INCORRECT_SUMMARY)
+ 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
+ || (!is_program && tag != GCOV_TAG_OBJECT_SUMMARY))
goto read_mismatch;
- if (gcov_read_summary (0, &local_prg))
+ gcov_read_summary (is_program ? &program : &object);
+ if ((error = gcov_is_error ()))
goto read_error;
- if (local_prg.checksum != program.checksum)
- continue;
- if (tag == GCOV_TAG_PLACEHOLDER_SUMMARY)
+ if (is_program && program.checksum == gcov_crc32)
{
- fprintf (stderr,
- "profiling:%s:Concurrent race detected\n",
- ptr->filename);
- goto read_fatal;
+ summary_pos = eof_pos;
+ goto rewrite;
}
- merging = -1;
- if (tag != GCOV_TAG_PROGRAM_SUMMARY)
- break;
+ }
+ }
+ goto rewrite;
+
+ read_error:;
+ fprintf (stderr, error < 0 ? "profiling:%s:Overflow merging\n"
+ : "profiling:%s:Error merging\n", gi_filename);
- if (program.runs
- && memcmp (&program, &local_prg, sizeof (program)))
- {
- fprintf (stderr, "profiling:%s:Invocation mismatch\n",
- ptr->filename);
- local_prg.runs = 0;
- }
- else
- memcpy (&program, &local_prg, sizeof (program));
- ptr->wkspc = base;
- break;
+ read_fatal:;
+ gcov_close ();
+ continue;
+
+ rewrite:;
+ gcov_rewrite ();
+ if (!summary_pos)
+ memset (&program, 0, sizeof (program));
+
+ /* Merge the summaries. */
+ f_ix = ~0u;
+ 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++)
+ cs_obj->num = cs_tobj->num;
+ else if (cs_obj->num != cs_tobj->num)
+ goto read_mismatch;
+ cs_obj->sum_all += cs_tobj->sum_all;
+ 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)
+ goto read_mismatch;
+ cs_prg->sum_all += cs_tprg->sum_all;
+ 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;
+ }
+ 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
+ && (!GCOV_LOCKED || cs_all->runs == cs_prg->runs)
+ && memcmp (cs_all, cs_prg, sizeof (*cs_all)))
+ {
+ fprintf (stderr, "profiling:%s:Invocation mismatch - some data files may have been removed%s",
+ gi_filename, GCOV_LOCKED
+ ? "" : " or concurrent update without locking support");
+ all.checksum = ~0u;
}
- da_file_seek (0, 0, SEEK_SET);
}
+
+ 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++;
+ }
- object.runs++;
- object.arcs = ptr->counter_sections[arc_data_index].n_counters;
- object.arc_sum = 0;
- if (object.arc_max_one < object_max_one)
- object.arc_max_one = object_max_one;
- object.arc_sum_max += object_max_one;
+ program.checksum = gcov_crc32;
/* Write out the data. */
- if (/* magic */
- gcov_write_unsigned (0, GCOV_DATA_MAGIC)
- /* version number */
- || gcov_write_unsigned (0, GCOV_VERSION))
- {
- write_error:;
- da_file_close ();
- fprintf (stderr, "profiling:%s:Error writing\n", ptr->filename);
- ptr->filename = 0;
- continue;
- }
+ gcov_write_tag_length (GCOV_DATA_MAGIC, GCOV_VERSION);
+ gcov_write_unsigned (gi_ptr->stamp);
/* Write execution counts for each function. */
- for (ix = 0; ix < ptr->n_counter_sections; ix++)
- counters[ix] = ptr->counter_sections[ix].counters;
- for (ix = ptr->n_functions, fn_info = ptr->functions; ix--; fn_info++)
+ 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. */
- if (gcov_write_unsigned (0, GCOV_TAG_FUNCTION)
- || !(base = gcov_reserve_length (0))
- /* function name */
- || gcov_write_string (0, fn_info->name,
- strlen (fn_info->name))
- /* function checksum */
- || gcov_write_unsigned (0, fn_info->checksum)
- || gcov_write_length (0, base))
- goto write_error;
-
- /* counters. */
- for (f_sect_index = 0;
- f_sect_index < fn_info->n_counter_sections;
- f_sect_index++)
+ gcov_write_tag_length (GCOV_TAG_FUNCTION, GCOV_TAG_FUNCTION_LENGTH);
+ gcov_write_unsigned (fi_ptr->ident);
+ gcov_write_unsigned (fi_ptr->checksum);
+
+ c_ix = 0;
+ for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++)
{
- tag = fn_info->counter_sections[f_sect_index].tag;
- for (sect_index = 0;
- sect_index < ptr->n_counter_sections;
- sect_index++)
- if (ptr->counter_sections[sect_index].tag == tag)
- break;
- if (sect_index == ptr->n_counter_sections)
- abort ();
-
- if (gcov_write_unsigned (0, tag)
- || !(base = gcov_reserve_length (0)))
- goto write_error;
-
- for (jx = fn_info->counter_sections[f_sect_index].n_counters; jx--;)
- {
- gcov_type count = *counters[sect_index]++;
-
- if (tag == GCOV_TAG_ARC_COUNTS)
- {
- object.arc_sum += count;
- if (object.arc_max_sum < count)
- object.arc_max_sum = count;
- }
- if (gcov_write_counter (0, count))
- goto write_error; /* RIP Edsger Dijkstra */
- }
- if (gcov_write_length (0, base))
- goto write_error;
- }
- }
+ gcov_type *c_ptr;
- /* Object file summary. */
- if (gcov_write_summary (0, GCOV_TAG_OBJECT_SUMMARY, &object))
- goto write_error;
+ if (!((1 << t_ix) & gi_ptr->ctr_mask))
+ continue;
- if (merging >= 0)
- {
- if (da_file_seek (0, 0, SEEK_END))
- goto write_error;
- ptr->wkspc = da_file_position (0);
- if (gcov_write_summary (0, GCOV_TAG_PLACEHOLDER_SUMMARY,
- &program))
- goto write_error;
- }
- else if (ptr->wkspc)
- {
- /* Zap trailing program summary */
- if (da_file_seek (0, ptr->wkspc, SEEK_SET))
- goto write_error;
- if (!local_prg.runs)
- ptr->wkspc = 0;
- if (gcov_write_unsigned (0, local_prg.runs
- ? GCOV_TAG_PLACEHOLDER_SUMMARY
- : GCOV_TAG_INCORRECT_SUMMARY))
- goto write_error;
- }
+ 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++);
- if (da_file_close ())
- {
- fprintf (stderr, "profiling:%s:Error closing\n", ptr->filename);
- ptr->filename = 0;
- }
- else
- {
- program_arcs += ptr->counter_sections[arc_data_index].n_counters;
- program_sum += object.arc_sum;
- if (program_max_sum < object.arc_max_sum)
- program_max_sum = object.arc_max_sum;
+ values[c_ix] = c_ptr;
+ c_ix++;
+ }
}
- free(counters);
- }
- /* Generate whole program statistics. */
- program.runs++;
- program.arcs = program_arcs;
- program.arc_sum = program_sum;
- if (program.arc_max_one < program_max_one)
- program.arc_max_one = program_max_one;
- if (program.arc_max_sum < program_max_sum)
- program.arc_max_sum = program_max_sum;
- program.arc_sum_max += program_max_one;
-
- /* Upate whole program statistics. */
- for (ptr = gcov_list; ptr; ptr = ptr->next)
- if (ptr->filename && ptr->wkspc)
- {
- FILE *da_file;
-
- da_file = fopen (ptr->filename, "r+b");
- if (!da_file)
- {
- fprintf (stderr, "profiling:%s:Cannot open\n", ptr->filename);
- continue;
- }
-
-#if defined (TARGET_HAS_F_SETLKW)
- while (fcntl (fileno (da_file), F_SETLKW, &s_flock)
- && errno == EINTR)
- continue;
-#endif
- if (fseek (da_file, ptr->wkspc, SEEK_SET)
- || gcov_write_summary (da_file, GCOV_TAG_PROGRAM_SUMMARY, &program)
- || fflush (da_file))
- fprintf (stderr, "profiling:%s:Error writing\n", ptr->filename);
- if (fclose (da_file))
- fprintf (stderr, "profiling:%s:Error closing\n", ptr->filename);
- }
+ /* Object file summary. */
+ gcov_write_summary (GCOV_TAG_OBJECT_SUMMARY, &object);
+
+ /* Generate whole program statistics. */
+ 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_filename);
+ }
}
/* Add a new object file onto the bb chain. Invoked automatically
{
if (!info->version)
return;
- if (info->version != GCOV_VERSION)
- gcov_version_mismatch (info, info->version);
- else
+ if (gcov_version (info, info->version, 0))
{
const char *ptr = info->filename;
- unsigned crc32 = gcov_crc32;
-
+ 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;
- unsigned value = *ptr << 24;
+ gcov_unsigned_t value = *ptr << 24;
for (ix = 8; ix--; value <<= 1)
{
- unsigned feedback;
+ gcov_unsigned_t feedback;
feedback = (value ^ crc32) & 0x80000000 ? 0x04c11db7 : 0;
crc32 <<= 1;
void
__gcov_flush (void)
{
- struct gcov_info *ptr;
+ const struct gcov_info *gi_ptr;
gcov_exit ();
- for (ptr = gcov_list; ptr; ptr = ptr->next)
+ for (gi_ptr = gcov_list; gi_ptr; gi_ptr = gi_ptr->next)
{
- unsigned i, j;
+ unsigned t_ix;
+ const struct gcov_ctr_info *ci_ptr;
- for (j = 0; j < ptr->n_counter_sections; j++)
- for (i = ptr->counter_sections[j].n_counters; i--;)
- ptr->counter_sections[j].counters[i] = 0;
+ for (t_ix = 0, ci_ptr = gi_ptr->counts; t_ix != GCOV_COUNTERS; t_ix++)
+ if ((1 << t_ix) & gi_ptr->ctr_mask)
+ {
+ memset (ci_ptr->values, 0, sizeof (gcov_type) * ci_ptr->num);
+ ci_ptr++;
+ }
+ }
+}
+
+#endif /* L_gcov */
+
+#ifdef L_gcov_merge_add
+/* 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_add (gcov_type *counters, unsigned n_counters)
+{
+ for (; n_counters; counters++, n_counters--)
+ *counters += gcov_read_counter ();
+}
+#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 */
+void
+__gcov_merge_single (gcov_type *counters, unsigned n_counters)
+{
+ unsigned i, n_measures;
+ gcov_type value, counter, all;
+
+ gcc_assert (!(n_counters % 3));
+ n_measures = n_counters / 3;
+ for (i = 0; i < n_measures; i++, counters += 3)
+ {
+ value = gcov_read_counter ();
+ counter = gcov_read_counter ();
+ all = gcov_read_counter ();
+
+ if (counters[0] == value)
+ counters[1] += counter;
+ else if (counter > counters[1])
+ {
+ counters[0] = value;
+ counters[1] = counter - counters[1];
+ }
+ else
+ counters[1] -= counter;
+ counters[2] += all;
}
}
+#endif /* L_gcov_merge_single */
+
+#ifdef L_gcov_merge_delta
+/* The profile merging function for choosing the most common
+ difference between two consecutive evaluations of the 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 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
+ -- total number of evaluations of the value */
+void
+__gcov_merge_delta (gcov_type *counters, unsigned n_counters)
+{
+ unsigned i, n_measures;
+ gcov_type last, value, counter, all;
+
+ gcc_assert (!(n_counters % 4));
+ n_measures = n_counters / 4;
+ for (i = 0; i < n_measures; i++, counters += 4)
+ {
+ last = gcov_read_counter ();
+ value = gcov_read_counter ();
+ counter = gcov_read_counter ();
+ all = gcov_read_counter ();
+
+ if (counters[1] == value)
+ counters[2] += counter;
+ else if (counter > counters[2])
+ {
+ counters[1] = value;
+ counters[2] = counter - counters[2];
+ }
+ else
+ counters[2] -= counter;
+ counters[3] += all;
+ }
+}
+#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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