Update 4.8.1 to 4.8.3.

My previous drop was the wrong version. The platform mingw is
currently using 4.8.3, not 4.8.1 (not sure how I got that wrong).

From ftp://ftp.gnu.org/gnu/gcc/gcc-4.8.3/gcc-4.8.3.tar.bz2.

Bug: http://b/26523949
Change-Id: Id85f1bdcbbaf78c7d0b5a69e74c798a08f341c35

1 files changed, 1326 insertions, 0 deletions

diff --git a/gcc-4.8.3/libgcc/libgcov.c b/gcc-4.8.3/libgcc/libgcov.c
new file mode 100644
index 000000000..a93eddbd4
--- /dev/null
+++ b/gcc-4.8.3/libgcc/libgcov.c
@@ -0,0 +1,1326 @@
+/* Routines required for instrumenting a program.  */
+/* Compile this one with gcc.  */
+/* Copyright (C) 1989-2013 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 3, or (at your option) any later
+version.
+
+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.
+
+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/>.  */
+
+#include "tconfig.h"
+#include "tsystem.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "libgcc_tm.h"
+#include "gthr.h"
+
+#if defined(inhibit_libc)
+#define IN_LIBGCOV (-1)
+#else
+#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_reset
+void __gcov_reset (void) {}
+#endif
+
+#ifdef L_gcov_dump
+void __gcov_dump (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 GCOV_LOCKED
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/stat.h>
+#endif
+
+extern void gcov_clear (void) ATTRIBUTE_HIDDEN;
+extern void gcov_exit (void) ATTRIBUTE_HIDDEN;
+extern int gcov_dump_complete ATTRIBUTE_HIDDEN;
+
+#ifdef L_gcov
+#include "gcov-io.c"
+
+struct gcov_fn_buffer
+{
+  struct gcov_fn_buffer *next;
+  unsigned fn_ix;
+  struct gcov_fn_info info;
+  /* note gcov_fn_info ends in a trailing array.  */
+};
+
+struct gcov_summary_buffer
+{
+  struct gcov_summary_buffer *next;
+  struct gcov_summary summary;
+};
+
+/* Chain of per-object gcov structures.  */
+static struct gcov_info *gcov_list;
+
+/* Size of the longest file name. */
+static size_t gcov_max_filename = 0;
+
+/* Flag when the profile has already been dumped via __gcov_dump().  */
+int gcov_dump_complete = 0;
+
+/* 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)
+{
+#if !defined(TARGET_POSIX_IO) && !defined(_WIN32)
+  (void) filename;
+  return -1;
+#else
+  char *s;
+
+  s = filename;
+
+  if (HAS_DRIVE_SPEC(s))
+    s += 2;
+  if (IS_DIR_SEPARATOR(*s))
+    ++s;
+  for (; *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
+#ifdef TARGET_POSIX_IO
+            && mkdir (filename, 0755) == -1
+#else
+            && mkdir (filename) == -1
+#endif
+            /* 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
+}
+
+static struct gcov_fn_buffer *
+free_fn_data (const struct gcov_info *gi_ptr, struct gcov_fn_buffer *buffer,
+	      unsigned limit)
+{
+  struct gcov_fn_buffer *next;
+  unsigned ix, n_ctr = 0;
+  
+  if (!buffer)
+    return 0;
+  next = buffer->next;
+
+  for (ix = 0; ix != limit; ix++)
+    if (gi_ptr->merge[ix])
+      free (buffer->info.ctrs[n_ctr++].values);
+  free (buffer);
+  return next;
+}
+  
+static struct gcov_fn_buffer **
+buffer_fn_data (const char *filename, const struct gcov_info *gi_ptr,
+		struct gcov_fn_buffer **end_ptr, unsigned fn_ix)
+{
+  unsigned n_ctrs = 0, ix = 0;
+  struct gcov_fn_buffer *fn_buffer;
+  unsigned len;
+
+  for (ix = GCOV_COUNTERS; ix--;)
+    if (gi_ptr->merge[ix])
+      n_ctrs++;
+
+  len = sizeof (*fn_buffer) + sizeof (fn_buffer->info.ctrs[0]) * n_ctrs;
+  fn_buffer = (struct gcov_fn_buffer *)malloc (len);
+
+  if (!fn_buffer)
+    goto fail;
+  
+  fn_buffer->next = 0;
+  fn_buffer->fn_ix = fn_ix;
+  fn_buffer->info.ident = gcov_read_unsigned ();
+  fn_buffer->info.lineno_checksum = gcov_read_unsigned ();
+  fn_buffer->info.cfg_checksum = gcov_read_unsigned ();
+
+  for (n_ctrs = ix = 0; ix != GCOV_COUNTERS; ix++)
+    {
+      gcov_unsigned_t length;
+      gcov_type *values;
+
+      if (!gi_ptr->merge[ix])
+	continue;
+      
+      if (gcov_read_unsigned () != GCOV_TAG_FOR_COUNTER (ix))
+	{
+	  len = 0;
+	  goto fail;
+	}
+
+      length = GCOV_TAG_COUNTER_NUM (gcov_read_unsigned ());
+      len = length * sizeof (gcov_type);
+      values = (gcov_type *)malloc (len);
+      if (!values)
+	goto fail;
+      
+      fn_buffer->info.ctrs[n_ctrs].num = length;
+      fn_buffer->info.ctrs[n_ctrs].values = values;
+
+      while (length--)
+	*values++ = gcov_read_counter ();
+      n_ctrs++;
+    }
+  
+  *end_ptr = fn_buffer;
+  return &fn_buffer->next;
+
+ fail:
+  fprintf (stderr, "profiling:%s:Function %u %s %u \n", filename, fn_ix,
+	   len ? "cannot allocate" : "counter mismatch", len ? len : ix);
+
+  return (struct gcov_fn_buffer **)free_fn_data (gi_ptr, fn_buffer, ix);
+}
+
+/* Add an unsigned value to the current crc */
+
+static gcov_unsigned_t
+crc32_unsigned (gcov_unsigned_t crc32, gcov_unsigned_t value)
+{
+  unsigned ix;
+
+  for (ix = 32; ix--; value <<= 1)
+    {
+      unsigned feedback;
+
+      feedback = (value ^ crc32) & 0x80000000 ? 0x04c11db7 : 0;
+      crc32 <<= 1;
+      crc32 ^= feedback;
+    }
+
+  return crc32;
+}
+
+/* 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)
+    {
+      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;
+    }
+  return 1;
+}
+
+/* Insert counter VALUE into HISTOGRAM.  */
+
+static void
+gcov_histogram_insert(gcov_bucket_type *histogram, gcov_type value)
+{
+  unsigned i;
+
+  i = gcov_histo_index(value);
+  histogram[i].num_counters++;
+  histogram[i].cum_value += value;
+  if (value < histogram[i].min_value)
+    histogram[i].min_value = value;
+}
+
+/* Computes a histogram of the arc counters to place in the summary SUM.  */
+
+static void
+gcov_compute_histogram (struct gcov_summary *sum)
+{
+  struct gcov_info *gi_ptr;
+  const struct gcov_fn_info *gfi_ptr;
+  const struct gcov_ctr_info *ci_ptr;
+  struct gcov_ctr_summary *cs_ptr;
+  unsigned t_ix, f_ix, ctr_info_ix, ix;
+  int h_ix;
+
+  /* This currently only applies to arc counters.  */
+  t_ix = GCOV_COUNTER_ARCS;
+
+  /* First check if there are any counts recorded for this counter.  */
+  cs_ptr = &(sum->ctrs[t_ix]);
+  if (!cs_ptr->num)
+    return;
+
+  for (h_ix = 0; h_ix < GCOV_HISTOGRAM_SIZE; h_ix++)
+    {
+      cs_ptr->histogram[h_ix].num_counters = 0;
+      cs_ptr->histogram[h_ix].min_value = cs_ptr->run_max;
+      cs_ptr->histogram[h_ix].cum_value = 0;
+    }
+
+  /* Walk through all the per-object structures and record each of
+     the count values in histogram.  */
+  for (gi_ptr = gcov_list; gi_ptr; gi_ptr = gi_ptr->next)
+    {
+      if (!gi_ptr->merge[t_ix])
+        continue;
+
+      /* Find the appropriate index into the gcov_ctr_info array
+         for the counter we are currently working on based on the
+         existence of the merge function pointer for this object.  */
+      for (ix = 0, ctr_info_ix = 0; ix < t_ix; ix++)
+        {
+          if (gi_ptr->merge[ix])
+            ctr_info_ix++;
+        }
+      for (f_ix = 0; f_ix != gi_ptr->n_functions; f_ix++)
+        {
+          gfi_ptr = gi_ptr->functions[f_ix];
+
+          if (!gfi_ptr || gfi_ptr->key != gi_ptr)
+            continue;
+
+          ci_ptr = &gfi_ptr->ctrs[ctr_info_ix];
+          for (ix = 0; ix < ci_ptr->num; ix++)
+            gcov_histogram_insert (cs_ptr->histogram, ci_ptr->values[ix]);
+        }
+    }
+}
+
+/* Dump the coverage counts. We merge with existing counts when
+   possible, to avoid growing the .da files ad infinitum. We use this
+   program's checksum to make sure we only accumulate whole program
+   statistics to the correct summary. An object file might be embedded
+   in two separate programs, and we must keep the two program
+   summaries separate.  */
+
+void
+gcov_exit (void)
+{
+  struct gcov_info *gi_ptr;
+  const struct gcov_fn_info *gfi_ptr;
+  struct gcov_summary this_prg; /* summary for program.  */
+#if !GCOV_LOCKED
+  struct gcov_summary all_prg;  /* summary for all instances of program.  */
+#endif
+  struct gcov_ctr_summary *cs_ptr;
+  const struct gcov_ctr_info *ci_ptr;
+  unsigned t_ix;
+  int f_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;
+  gcov_unsigned_t crc32 = 0;
+
+  /* Prevent the counters from being dumped a second time on exit when the
+     application already wrote out the profile using __gcov_dump().  */
+  if (gcov_dump_complete)
+    return;
+
+#if !GCOV_LOCKED
+  memset (&all_prg, 0, sizeof (all_prg));
+#endif
+  /* Find the totals for this execution.  */
+  memset (&this_prg, 0, sizeof (this_prg));
+  for (gi_ptr = gcov_list; gi_ptr; gi_ptr = gi_ptr->next)
+    {
+      crc32 = crc32_unsigned (crc32, gi_ptr->stamp);
+      crc32 = crc32_unsigned (crc32, gi_ptr->n_functions);
+      
+      for (f_ix = 0; (unsigned)f_ix != gi_ptr->n_functions; f_ix++)
+	{
+	  gfi_ptr = gi_ptr->functions[f_ix];
+
+	  if (gfi_ptr && gfi_ptr->key != gi_ptr)
+	    gfi_ptr = 0;
+	  
+	  crc32 = crc32_unsigned (crc32, gfi_ptr ? gfi_ptr->cfg_checksum : 0);
+	  crc32 = crc32_unsigned (crc32,
+				  gfi_ptr ? gfi_ptr->lineno_checksum : 0);
+	  if (!gfi_ptr)
+	    continue;
+
+	  ci_ptr = gfi_ptr->ctrs;
+	  for (t_ix = 0; t_ix != GCOV_COUNTERS_SUMMABLE; t_ix++)
+	    {
+	      if (!gi_ptr->merge[t_ix])
+		continue;
+
+	      cs_ptr = &this_prg.ctrs[t_ix];
+	      cs_ptr->num += ci_ptr->num;
+	      crc32 = crc32_unsigned (crc32, 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++;
+	    }
+	}
+    }
+  gcov_compute_histogram (&this_prg);
+
+  {
+    /* 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;
+      }
+  }
+
+  /* Get file name relocation prefix.  Non-absolute values are ignored. */
+  gcov_prefix = getenv("GCOV_PREFIX");
+  if (gcov_prefix)
+    {
+      prefix_length = strlen(gcov_prefix);
+
+      /* Remove an unnecessary trailing '/' */
+      if (IS_DIR_SEPARATOR (gcov_prefix[prefix_length - 1]))
+	prefix_length--;
+    }
+  else
+    prefix_length = 0;
+
+  /* If no prefix was specified and a prefix stip, then we assume
+     relative.  */
+  if (gcov_prefix_strip != 0 && prefix_length == 0)
+    {
+      gcov_prefix = ".";
+      prefix_length = 1;
+    }
+  /* Allocate and initialize the filename scratch space plus one.  */
+  gi_filename = (char *) alloca (prefix_length + gcov_max_filename + 2);
+  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)
+    {
+      unsigned n_counts;
+      struct gcov_summary prg; /* summary for this object over all
+				  program.  */
+      struct gcov_ctr_summary *cs_prg, *cs_tprg;
+#if !GCOV_LOCKED
+      struct gcov_ctr_summary *cs_all;
+#endif
+      int error = 0;
+      gcov_unsigned_t tag, length;
+      gcov_position_t summary_pos = 0;
+      gcov_position_t eof_pos = 0;
+      const char *fname, *s;
+      struct gcov_fn_buffer *fn_buffer = 0;
+      struct gcov_fn_buffer **fn_tail = &fn_buffer;
+      struct gcov_summary_buffer *next_sum_buffer, *sum_buffer = 0;
+      struct gcov_summary_buffer **sum_tail = &sum_buffer;
+
+      fname = gi_ptr->filename;
+
+      /* Avoid to add multiple drive letters into combined path.  */
+      if (prefix_length != 0 && HAS_DRIVE_SPEC(fname))
+        fname += 2;
+
+      /* Build relocated filename, stripping off leading
+         directories from the initial filename if requested. */
+      if (gcov_prefix_strip > 0)
+        {
+          int level = 0;
+          s = fname;
+          if (IS_DIR_SEPARATOR(*s))
+            ++s;
+
+          /* Skip selected directory levels. */
+	  for (; (*s != '\0') && (level < gcov_prefix_strip); s++)
+	    if (IS_DIR_SEPARATOR(*s))
+	      {
+		fname = s;
+		level++;
+	      }
+        }
+
+      /* Update complete filename with stripped original. */
+      if (prefix_length != 0 && !IS_DIR_SEPARATOR (*fname))
+        {
+          /* If prefix is given, add directory separator.  */
+	  strcpy (gi_filename_up, "/");
+	  strcpy (gi_filename_up + 1, fname);
+	}
+      else
+        strcpy (gi_filename_up, fname);
+
+      if (!gcov_open (gi_filename))
+	{
+	  /* 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;
+	    }
+	  if (!gcov_open (gi_filename))
+	    {
+              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;
+
+	  /* Look for program summary.  */
+	  for (f_ix = 0;;)
+	    {
+	      struct gcov_summary tmp;
+	      
+	      eof_pos = gcov_position ();
+	      tag = gcov_read_unsigned ();
+	      if (tag != GCOV_TAG_PROGRAM_SUMMARY)
+		break;
+
+	      f_ix--;
+	      length = gcov_read_unsigned ();
+	      gcov_read_summary (&tmp);
+	      if ((error = gcov_is_error ()))
+		goto read_error;
+	      if (summary_pos)
+                {
+                  /* Save all summaries after the one that will be
+                     merged into below. These will need to be rewritten
+                     as histogram merging may change the number of non-zero
+                     histogram entries that will be emitted, and thus the
+                     size of the merged summary.  */
+                  (*sum_tail) = (struct gcov_summary_buffer *)
+                      malloc (sizeof(struct gcov_summary_buffer));
+                  (*sum_tail)->summary = tmp;
+                  (*sum_tail)->next = 0;
+                  sum_tail = &((*sum_tail)->next);
+                  goto next_summary;
+                }
+	      if (tmp.checksum != crc32)
+                goto next_summary;
+	      
+	      for (t_ix = 0; t_ix != GCOV_COUNTERS_SUMMABLE; t_ix++)
+		if (tmp.ctrs[t_ix].num != this_prg.ctrs[t_ix].num)
+                  goto next_summary;
+	      prg = tmp;
+	      summary_pos = eof_pos;
+
+	    next_summary:;
+	    }
+	  
+	  /* Merge execution counts for each function.  */
+	  for (f_ix = 0; (unsigned)f_ix != gi_ptr->n_functions;
+	       f_ix++, tag = gcov_read_unsigned ())
+	    {
+	      gfi_ptr = gi_ptr->functions[f_ix];
+
+	      if (tag != GCOV_TAG_FUNCTION)
+		goto read_mismatch;
+
+	      length = gcov_read_unsigned ();
+	      if (!length)
+		/* This function did not appear in the other program.
+		   We have nothing to merge.  */
+		continue;
+
+	      if (length != GCOV_TAG_FUNCTION_LENGTH)
+		goto read_mismatch;
+	      
+	      if (!gfi_ptr || gfi_ptr->key != gi_ptr)
+		{
+		  /* This function appears in the other program.  We
+		     need to buffer the information in order to write
+		     it back out -- we'll be inserting data before
+		     this point, so cannot simply keep the data in the
+		     file.  */
+		  fn_tail = buffer_fn_data (gi_filename,
+					    gi_ptr, fn_tail, f_ix);
+		  if (!fn_tail)
+		    goto read_mismatch;
+		  continue;
+		}
+
+	      length = gcov_read_unsigned ();
+	      if (length != gfi_ptr->ident)
+		goto read_mismatch;
+	      
+	      length = gcov_read_unsigned ();
+	      if (length != gfi_ptr->lineno_checksum)
+		goto read_mismatch;
+	      
+	      length = gcov_read_unsigned ();
+	      if (length != gfi_ptr->cfg_checksum)
+		goto read_mismatch;
+	      
+	      ci_ptr = gfi_ptr->ctrs;
+	      for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++)
+		{
+		  gcov_merge_fn merge = gi_ptr->merge[t_ix];
+
+		  if (!merge)
+		    continue;
+
+		  tag = gcov_read_unsigned ();
+		  length = gcov_read_unsigned ();
+		  if (tag != GCOV_TAG_FOR_COUNTER (t_ix)
+		      || length != GCOV_TAG_COUNTER_LENGTH (ci_ptr->num))
+		    goto read_mismatch;
+		  (*merge) (ci_ptr->values, ci_ptr->num);
+		  ci_ptr++;
+		}
+	      if ((error = gcov_is_error ()))
+		goto read_error;
+	    }
+
+	  if (tag)
+	    {
+	    read_mismatch:;
+	      fprintf (stderr, "profiling:%s:Merge mismatch for %s %u\n",
+		       gi_filename, f_ix >= 0 ? "function" : "summary",
+		       f_ix < 0 ? -1 - f_ix : f_ix);
+	      goto read_fatal;
+	    }
+	}
+      goto rewrite;
+
+    read_error:;
+      fprintf (stderr, "profiling:%s:%s merging\n", gi_filename,
+	       error < 0 ? "Overflow": "Error");
+
+      goto read_fatal;
+
+    rewrite:;
+      gcov_rewrite ();
+      if (!summary_pos)
+	{
+	  memset (&prg, 0, sizeof (prg));
+	  summary_pos = eof_pos;
+	}
+
+      /* Merge the summaries.  */
+      for (t_ix = 0; t_ix < GCOV_COUNTERS_SUMMABLE; t_ix++)
+	{
+	  cs_prg = &prg.ctrs[t_ix];
+	  cs_tprg = &this_prg.ctrs[t_ix];
+
+	  if (gi_ptr->merge[t_ix])
+	    {
+	      if (!cs_prg->runs++)
+	        cs_prg->num = cs_tprg->num;
+	      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;
+              if (cs_prg->runs == 1)
+                memcpy (cs_prg->histogram, cs_tprg->histogram,
+                        sizeof (gcov_bucket_type) * GCOV_HISTOGRAM_SIZE);
+              else
+                gcov_histogram_merge (cs_prg->histogram, cs_tprg->histogram);
+	    }
+	  else if (cs_prg->runs)
+	    goto read_mismatch;
+
+#if !GCOV_LOCKED
+	  cs_all = &all_prg.ctrs[t_ix];
+	  if (!cs_all->runs && cs_prg->runs)
+            {
+              cs_all->num = cs_prg->num;
+              cs_all->runs = cs_prg->runs;
+              cs_all->sum_all = cs_prg->sum_all;
+              cs_all->run_max = cs_prg->run_max;
+              cs_all->sum_max = cs_prg->sum_max;
+            }
+	  else if (!all_prg.checksum
+                   /* Don't compare the histograms, which may have slight
+                      variations depending on the order they were updated
+                      due to the truncating integer divides used in the
+                      merge.  */
+                   && (cs_all->num != cs_prg->num
+                       || cs_all->runs != cs_prg->runs
+                       || cs_all->sum_all != cs_prg->sum_all
+                       || cs_all->run_max != cs_prg->run_max
+                       || cs_all->sum_max != cs_prg->sum_max))
+	    {
+	      fprintf (stderr,
+                       "profiling:%s:Data file mismatch - some data files may "
+                       "have been concurrently updated without locking support\n",
+		       gi_filename);
+	      all_prg.checksum = ~0u;
+	    }
+#endif
+	}
+
+      prg.checksum = crc32;
+
+      /* Write out the data.  */
+      if (!eof_pos)
+	{
+	  gcov_write_tag_length (GCOV_DATA_MAGIC, GCOV_VERSION);
+	  gcov_write_unsigned (gi_ptr->stamp);
+	}
+
+      if (summary_pos)
+	gcov_seek (summary_pos);
+
+      /* Generate whole program statistics.  */
+      gcov_write_summary (GCOV_TAG_PROGRAM_SUMMARY, &prg);
+
+      /* Rewrite all the summaries that were after the summary we merged
+         into. This is necessary as the merged summary may have a different
+         size due to the number of non-zero histogram entries changing after
+         merging.  */
+      
+      while (sum_buffer)
+        {
+          gcov_write_summary (GCOV_TAG_PROGRAM_SUMMARY, &sum_buffer->summary);
+          next_sum_buffer = sum_buffer->next;
+          free (sum_buffer);
+          sum_buffer = next_sum_buffer;
+        }
+
+      /* Write execution counts for each function.  */
+      for (f_ix = 0; (unsigned)f_ix != gi_ptr->n_functions; f_ix++)
+	{
+	  unsigned buffered = 0;
+
+	  if (fn_buffer && fn_buffer->fn_ix == (unsigned)f_ix)
+	    {
+	      /* Buffered data from another program.  */
+	      buffered = 1;
+	      gfi_ptr = &fn_buffer->info;
+	      length = GCOV_TAG_FUNCTION_LENGTH;
+	    }
+	  else
+	    {
+	      gfi_ptr = gi_ptr->functions[f_ix];
+	      if (gfi_ptr && gfi_ptr->key == gi_ptr)
+		length = GCOV_TAG_FUNCTION_LENGTH;
+	      else
+		length = 0;
+	    }
+	  
+	  gcov_write_tag_length (GCOV_TAG_FUNCTION, length);
+	  if (!length)
+	    continue;
+	  
+	  gcov_write_unsigned (gfi_ptr->ident);
+	  gcov_write_unsigned (gfi_ptr->lineno_checksum);
+	  gcov_write_unsigned (gfi_ptr->cfg_checksum);
+
+	  ci_ptr = gfi_ptr->ctrs;
+	  for (t_ix = 0; t_ix < GCOV_COUNTERS; t_ix++)
+	    {
+	      if (!gi_ptr->merge[t_ix])
+		continue;
+
+	      n_counts = ci_ptr->num;
+	      gcov_write_tag_length (GCOV_TAG_FOR_COUNTER (t_ix),
+				     GCOV_TAG_COUNTER_LENGTH (n_counts));
+	      gcov_type *c_ptr = ci_ptr->values;
+	      while (n_counts--)
+		gcov_write_counter (*c_ptr++);
+	      ci_ptr++;
+	    }
+	  if (buffered)
+	    fn_buffer = free_fn_data (gi_ptr, fn_buffer, GCOV_COUNTERS);
+	}
+
+      gcov_write_unsigned (0);
+
+    read_fatal:;
+      while (fn_buffer)
+	fn_buffer = free_fn_data (gi_ptr, fn_buffer, GCOV_COUNTERS);
+
+      if ((error = gcov_close ()))
+	  fprintf (stderr, error  < 0 ?
+		   "profiling:%s:Overflow writing\n" :
+		   "profiling:%s:Error writing\n",
+		   gi_filename);
+    }
+}
+
+/* Reset all counters to zero.  */
+
+void
+gcov_clear (void)
+{
+  const struct gcov_info *gi_ptr;
+
+  for (gi_ptr = gcov_list; gi_ptr; gi_ptr = gi_ptr->next)
+    {
+      unsigned f_ix;
+
+      for (f_ix = 0; f_ix < gi_ptr->n_functions; f_ix++)
+	{
+	  unsigned t_ix;
+	  const struct gcov_fn_info *gfi_ptr = gi_ptr->functions[f_ix];
+
+	  if (!gfi_ptr || gfi_ptr->key != gi_ptr)
+	    continue;
+	  const struct gcov_ctr_info *ci_ptr = gfi_ptr->ctrs;
+	  for (t_ix = 0; t_ix != GCOV_COUNTERS; t_ix++)
+	    {
+	      if (!gi_ptr->merge[t_ix])
+		continue;
+	      
+	      memset (ci_ptr->values, 0, sizeof (gcov_type) * ci_ptr->num);
+	      ci_ptr++;
+	    }
+	}
+    }
+}
+
+/* Add a new object file onto the bb chain.  Invoked automatically
+   when running an object file's global ctors.  */
+
+void
+__gcov_init (struct gcov_info *info)
+{
+  if (!info->version || !info->n_functions)
+    return;
+  if (gcov_version (info, info->version, 0))
+    {
+      size_t filename_length = strlen(info->filename);
+
+      /* Refresh the longest file name information */
+      if (filename_length > gcov_max_filename)
+        gcov_max_filename = filename_length;
+
+      if (!gcov_list)
+	atexit (gcov_exit);
+
+      info->next = gcov_list;
+      gcov_list = info;
+    }
+  info->version = 0;
+}
+
+#ifdef __GTHREAD_MUTEX_INIT
+ATTRIBUTE_HIDDEN __gthread_mutex_t __gcov_flush_mx = __GTHREAD_MUTEX_INIT;
+#define init_mx_once()
+#else
+__gthread_mutex_t __gcov_flush_mx ATTRIBUTE_HIDDEN;
+
+static void
+init_mx (void)
+{
+  __GTHREAD_MUTEX_INIT_FUNCTION (&__gcov_flush_mx);
+}
+static void
+init_mx_once (void)
+{
+  static __gthread_once_t once = __GTHREAD_ONCE_INIT;
+  __gthread_once (&once, init_mx);
+}
+#endif
+
+/* Called before fork or exec - write out profile information gathered so
+   far and reset it to zero.  This avoids duplication or loss of the
+   profile information gathered so far.  */
+
+void
+__gcov_flush (void)
+{
+  init_mx_once ();
+  __gthread_mutex_lock (&__gcov_flush_mx);
+
+  gcov_exit ();
+  gcov_clear ();
+
+  __gthread_mutex_unlock (&__gcov_flush_mx);
+}
+
+#endif /* L_gcov */
+
+#ifdef L_gcov_reset
+
+/* Function that can be called from application to reset counters to zero,
+   in order to collect profile in region of interest.  */
+
+void
+__gcov_reset (void)
+{
+  gcov_clear ();
+  /* Re-enable dumping to support collecting profile in multiple regions
+     of interest.  */
+  gcov_dump_complete = 0;
+}
+
+#endif /* L_gcov_reset */
+
+#ifdef L_gcov_dump
+
+/* Function that can be called from application to write profile collected
+   so far, in order to collect profile in region of interest.  */
+
+void
+__gcov_dump (void)
+{
+  gcov_exit ();
+  /* Prevent profile from being dumped a second time on application exit.  */
+  gcov_dump_complete = 1;
+}
+
+#endif /* L_gcov_dump */
+
+#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 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
+
+/* By default, the C++ compiler will use function addresses in the
+   vtable entries.  Setting TARGET_VTABLE_USES_DESCRIPTORS to nonzero
+   tells the compiler to use function descriptors instead.  The value
+   of this macro says how many words wide the descriptor is (normally 2),
+   but it may be dependent on target flags.  Since we do not have access
+   to the target flags here we just check to see if it is set and use
+   that to set VTABLE_USES_DESCRIPTORS to 0 or 1.
+
+   It is assumed that the address of a function descriptor may be treated
+   as a pointer to a function.  */
+
+#ifdef TARGET_VTABLE_USES_DESCRIPTORS
+#define VTABLE_USES_DESCRIPTORS 1
+#else
+#define VTABLE_USES_DESCRIPTORS 0
+#endif
+
+/* 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
+      || (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
+/* Bitwise-OR VALUE into COUNTER.  */
+
+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)
+{
+  pid_t pid;
+  extern __gthread_mutex_t __gcov_flush_mx;
+  __gcov_flush ();
+  pid = fork ();
+  if (pid == 0)
+    __GTHREAD_MUTEX_INIT_FUNCTION (&__gcov_flush_mx);
+  return pid;
+}
+#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 */