--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/gcov-tool.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,612 @@
+/* Gcc offline profile processing tool support. */
+/* Copyright (C) 2014-2017 Free Software Foundation, Inc.
+   Contributed by Rong Xu <xur@google.com>.
+
+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 "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "intl.h"
+#include "diagnostic.h"
+#include "version.h"
+#include "gcov-io.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#if HAVE_FTW_H
+#include <ftw.h>
+#endif
+#include <getopt.h>
+
+extern int gcov_profile_merge (struct gcov_info*, struct gcov_info*, int, int);
+extern int gcov_profile_overlap (struct gcov_info*, struct gcov_info*);
+extern int gcov_profile_normalize (struct gcov_info*, gcov_type);
+extern int gcov_profile_scale (struct gcov_info*, float, int, int);
+extern struct gcov_info* gcov_read_profile_dir (const char*, int);
+extern void gcov_do_dump (struct gcov_info *, int);
+extern const char *gcov_get_filename (struct gcov_info *list);
+extern void gcov_set_verbose (void);
+
+/* Set to verbose output mode.  */
+static bool verbose;
+
+#if HAVE_FTW_H
+
+/* Remove file NAME if it has a gcda suffix. */
+
+static int
+unlink_gcda_file (const char *name,
+                  const struct stat *status ATTRIBUTE_UNUSED,
+                  int type ATTRIBUTE_UNUSED,
+                  struct FTW *ftwbuf ATTRIBUTE_UNUSED)
+{
+  int ret = 0;
+  int len = strlen (name);
+  int len1 = strlen (GCOV_DATA_SUFFIX);
+
+  if (len > len1 && !strncmp (len -len1 + name, GCOV_DATA_SUFFIX, len1))
+    ret = remove (name);
+
+  if (ret)
+    fatal_error (input_location, "error in removing %s\n", name);
+
+  return ret;
+}
+#endif
+
+/* Remove the gcda files in PATH recursively.  */
+
+static int
+unlink_profile_dir (const char *path ATTRIBUTE_UNUSED)
+{
+#if HAVE_FTW_H
+    return nftw(path, unlink_gcda_file, 64, FTW_DEPTH | FTW_PHYS);
+#else
+    return -1;
+#endif
+}
+
+/* Output GCOV_INFO lists PROFILE to directory OUT. Note that
+   we will remove all the gcda files in OUT.  */
+
+static void
+gcov_output_files (const char *out, struct gcov_info *profile)
+{
+  char *pwd;
+  int ret;
+
+  /* Try to make directory if it doesn't already exist.  */
+  if (access (out, F_OK) == -1)
+    {
+      if (mkdir (out, S_IRWXU | S_IRWXG | S_IRWXO) == -1 && errno != EEXIST)
+        fatal_error (input_location, "Cannot make directory %s", out);
+    } else
+      unlink_profile_dir (out);
+
+  /* Output new profile.  */
+  pwd = getcwd (NULL, 0);
+
+  if (pwd == NULL)
+    fatal_error (input_location, "Cannot get current directory name");
+
+  ret = chdir (out);
+  if (ret)
+    fatal_error (input_location, "Cannot change directory to %s", out);
+
+  /* Verify that output file does not exist (either was removed by
+     unlink_profile_data or removed by user).  */
+  const char *filename = gcov_get_filename (profile);
+
+  if (access (filename, F_OK) != -1)
+    fatal_error (input_location, "output file %s already exists in folder %s",
+		 filename, out);
+
+  gcov_do_dump (profile, 0);
+
+  ret = chdir (pwd);
+  if (ret)
+    fatal_error (input_location, "Cannot change directory to %s", pwd);
+
+  free (pwd);
+}
+
+/* Merging profile D1 and D2 with weight as W1 and W2, respectively.
+   The result profile is written to directory OUT.
+   Return 0 on success.  */
+
+static int
+profile_merge (const char *d1, const char *d2, const char *out, int w1, int w2)
+{
+  struct gcov_info *d1_profile;
+  struct gcov_info *d2_profile;
+  int ret;
+
+  d1_profile = gcov_read_profile_dir (d1, 0);
+  if (!d1_profile)
+    return 1;
+
+  if (d2)
+    {
+      d2_profile = gcov_read_profile_dir (d2, 0);
+      if (!d2_profile)
+        return 1;
+
+      /* The actual merge: we overwrite to d1_profile.  */
+      ret = gcov_profile_merge (d1_profile, d2_profile, w1, w2);
+
+      if (ret)
+        return ret;
+    }
+
+  gcov_output_files (out, d1_profile);
+
+  return 0;
+}
+
+/* Usage message for profile merge.  */
+
+static void
+print_merge_usage_message (int error_p)
+{
+  FILE *file = error_p ? stderr : stdout;
+
+  fnotice (file, "  merge [options] <dir1> <dir2>         Merge coverage file contents\n");
+  fnotice (file, "    -o, --output <dir>                  Output directory\n");
+  fnotice (file, "    -v, --verbose                       Verbose mode\n");
+  fnotice (file, "    -w, --weight <w1,w2>                Set weights (float point values)\n");
+}
+
+static const struct option merge_options[] =
+{
+  { "verbose",                no_argument,       NULL, 'v' },
+  { "output",                 required_argument, NULL, 'o' },
+  { "weight",                 required_argument, NULL, 'w' },
+  { 0, 0, 0, 0 }
+};
+
+/* Print merge usage and exit.  */
+
+static void
+merge_usage (void)
+{
+  fnotice (stderr, "Merge subcomand usage:");
+  print_merge_usage_message (true);
+  exit (FATAL_EXIT_CODE);
+}
+
+/* Driver for profile merge sub-command.  */
+
+static int
+do_merge (int argc, char **argv)
+{
+  int opt;
+  const char *output_dir = 0;
+  int w1 = 1, w2 = 1;
+
+  optind = 0;
+  while ((opt = getopt_long (argc, argv, "vo:w:", merge_options, NULL)) != -1)
+    {
+      switch (opt)
+        {
+        case 'v':
+          verbose = true;
+          gcov_set_verbose ();
+          break;
+        case 'o':
+          output_dir = optarg;
+          break;
+        case 'w':
+          sscanf (optarg, "%d,%d", &w1, &w2);
+          if (w1 < 0 || w2 < 0)
+            fatal_error (input_location, "weights need to be non-negative\n");
+          break;
+        default:
+          merge_usage ();
+        }
+    }
+
+  if (output_dir == NULL)
+    output_dir = "merged_profile";
+
+  if (argc - optind != 2)
+    merge_usage ();
+
+  return profile_merge (argv[optind], argv[optind+1], output_dir, w1, w2);
+}
+
+/* If N_VAL is no-zero, normalize the profile by setting the largest counter
+   counter value to N_VAL and scale others counters proportionally.
+   Otherwise, multiply the all counters by SCALE.  */
+
+static int
+profile_rewrite (const char *d1, const char *out, int64_t n_val,
+                 float scale, int n, int d)
+{
+  struct gcov_info * d1_profile;
+
+  d1_profile = gcov_read_profile_dir (d1, 0);
+  if (!d1_profile)
+    return 1;
+
+  if (n_val)
+    gcov_profile_normalize (d1_profile, (gcov_type) n_val);
+  else
+    gcov_profile_scale (d1_profile, scale, n, d);
+
+  gcov_output_files (out, d1_profile);
+  return 0;
+}
+
+/* Usage function for profile rewrite.  */
+
+static void
+print_rewrite_usage_message (int error_p)
+{
+  FILE *file = error_p ? stderr : stdout;
+
+  fnotice (file, "  rewrite [options] <dir>               Rewrite coverage file contents\n");
+  fnotice (file, "    -n, --normalize <int64_t>           Normalize the profile\n");
+  fnotice (file, "    -o, --output <dir>                  Output directory\n");
+  fnotice (file, "    -s, --scale <float or simple-frac>  Scale the profile counters\n");
+  fnotice (file, "    -v, --verbose                       Verbose mode\n");
+}
+
+static const struct option rewrite_options[] =
+{
+  { "verbose",                no_argument,       NULL, 'v' },
+  { "output",                 required_argument, NULL, 'o' },
+  { "scale",                  required_argument, NULL, 's' },
+  { "normalize",              required_argument, NULL, 'n' },
+  { 0, 0, 0, 0 }
+};
+
+/* Print profile rewrite usage and exit.  */
+
+static void
+rewrite_usage (void)
+{
+  fnotice (stderr, "Rewrite subcommand usage:");
+  print_rewrite_usage_message (true);
+  exit (FATAL_EXIT_CODE);
+}
+
+/* Driver for profile rewrite sub-command. */
+
+static int
+do_rewrite (int argc, char **argv)
+{
+  int opt;
+  int ret;
+  const char *output_dir = 0;
+  int64_t normalize_val = 0;
+  float scale = 0.0;
+  int numerator = 1;
+  int denominator = 1;
+  int do_scaling = 0;
+
+  optind = 0;
+  while ((opt = getopt_long (argc, argv, "vo:s:n:", rewrite_options, NULL)) != -1)
+    {
+      switch (opt)
+        {
+        case 'v':
+          verbose = true;
+          gcov_set_verbose ();
+          break;
+        case 'o':
+          output_dir = optarg;
+          break;
+        case 'n':
+          if (!do_scaling)
+#if defined(INT64_T_IS_LONG)
+	    normalize_val = strtol (optarg, (char **)NULL, 10);
+#else
+	    normalize_val = strtoll (optarg, (char **)NULL, 10);
+#endif
+          else
+            fnotice (stderr, "scaling cannot co-exist with normalization,"
+                " skipping\n");
+          break;
+        case 's':
+          ret = 0;
+          do_scaling = 1;
+          if (strstr (optarg, "/"))
+            {
+              ret = sscanf (optarg, "%d/%d", &numerator, &denominator);
+              if (ret == 2)
+                {
+                  if (numerator < 0 || denominator <= 0)
+                    {
+                      fnotice (stderr, "incorrect format in scaling, using 1/1\n");
+                      denominator = 1;
+                      numerator = 1;
+                    }
+                }
+            }
+          if (ret != 2)
+            {
+              ret = sscanf (optarg, "%f", &scale);
+              if (ret != 1)
+                fnotice (stderr, "incorrect format in scaling, using 1/1\n");
+              else
+                denominator = 0;
+            }
+
+          if (scale < 0.0)
+            fatal_error (input_location, "scale needs to be non-negative\n");
+
+          if (normalize_val != 0)
+            {
+              fnotice (stderr, "normalization cannot co-exist with scaling\n");
+              normalize_val = 0;
+            }
+          break;
+        default:
+          rewrite_usage ();
+        }
+    }
+
+  if (output_dir == NULL)
+    output_dir = "rewrite_profile";
+
+  if (argc - optind == 1)
+    {
+      if (denominator > 0)
+        ret = profile_rewrite (argv[optind],  output_dir, 0, 0.0, numerator, denominator);
+      else
+        ret = profile_rewrite (argv[optind],  output_dir, normalize_val, scale, 0, 0);
+    }
+  else
+    rewrite_usage ();
+
+  return ret;
+}
+
+/* Driver function to computer the overlap score b/w profile D1 and D2.
+   Return 1 on error and 0 if OK.  */
+
+static int
+profile_overlap (const char *d1, const char *d2)
+{
+  struct gcov_info *d1_profile;
+  struct gcov_info *d2_profile;
+
+  d1_profile = gcov_read_profile_dir (d1, 0);
+  if (!d1_profile)
+    return 1;
+
+  if (d2)
+    {
+      d2_profile = gcov_read_profile_dir (d2, 0);
+      if (!d2_profile)
+        return 1;
+
+      return gcov_profile_overlap (d1_profile, d2_profile);
+    }
+
+  return 1;
+}
+
+/* Usage message for profile overlap.  */
+
+static void
+print_overlap_usage_message (int error_p)
+{
+  FILE *file = error_p ? stderr : stdout;
+
+  fnotice (file, "  overlap [options] <dir1> <dir2>       Compute the overlap of two profiles\n");
+  fnotice (file, "    -f, --function                      Print function level info\n");
+  fnotice (file, "    -F, --fullname                      Print full filename\n");
+  fnotice (file, "    -h, --hotonly                       Only print info for hot objects/functions\n");
+  fnotice (file, "    -o, --object                        Print object level info\n");
+  fnotice (file, "    -t <float>, --hot_threshold <float> Set the threshold for hotness\n");
+  fnotice (file, "    -v, --verbose                       Verbose mode\n");
+
+}
+
+static const struct option overlap_options[] =
+{
+  { "verbose",                no_argument,       NULL, 'v' },
+  { "function",               no_argument,       NULL, 'f' },
+  { "fullname",               no_argument,       NULL, 'F' },
+  { "object",                 no_argument,       NULL, 'o' },
+  { "hotonly",                no_argument,       NULL, 'h' },
+  { "hot_threshold",          required_argument, NULL, 't' },
+  { 0, 0, 0, 0 }
+};
+
+/* Print overlap usage and exit.  */
+
+static void
+overlap_usage (void)
+{
+  fnotice (stderr, "Overlap subcomand usage:");
+  print_overlap_usage_message (true);
+  exit (FATAL_EXIT_CODE);
+}
+
+int overlap_func_level;
+int overlap_obj_level;
+int overlap_hot_only;
+int overlap_use_fullname;
+double overlap_hot_threshold = 0.005;
+
+/* Driver for profile overlap sub-command.  */
+
+static int
+do_overlap (int argc, char **argv)
+{
+  int opt;
+  int ret;
+
+  optind = 0;
+  while ((opt = getopt_long (argc, argv, "vfFoht:", overlap_options, NULL)) != -1)
+    {
+      switch (opt)
+        {
+        case 'v':
+          verbose = true;
+          gcov_set_verbose ();
+          break;
+        case 'f':
+          overlap_func_level = 1;
+          break;
+        case 'F':
+          overlap_use_fullname = 1;
+          break;
+        case 'o':
+          overlap_obj_level = 1;
+          break;
+        case 'h':
+          overlap_hot_only = 1;
+          break;
+        case 't':
+          overlap_hot_threshold = atof (optarg);
+          break;
+        default:
+          overlap_usage ();
+        }
+    }
+
+  if (argc - optind == 2)
+    ret = profile_overlap (argv[optind], argv[optind+1]);
+  else
+    overlap_usage ();
+
+  return ret;
+}
+
+
+/* Print a usage message and exit.  If ERROR_P is nonzero, this is an error,
+   otherwise the output of --help.  */
+
+static void
+print_usage (int error_p)
+{
+  FILE *file = error_p ? stderr : stdout;
+  int status = error_p ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE;
+
+  fnotice (file, "Usage: %s [OPTION]... SUB_COMMAND [OPTION]...\n\n", progname);
+  fnotice (file, "Offline tool to handle gcda counts\n\n");
+  fnotice (file, "  -h, --help                            Print this help, then exit\n");
+  fnotice (file, "  -v, --version                         Print version number, then exit\n");
+  print_merge_usage_message (error_p);
+  print_rewrite_usage_message (error_p);
+  print_overlap_usage_message (error_p);
+  fnotice (file, "\nFor bug reporting instructions, please see:\n%s.\n",
+           bug_report_url);
+  exit (status);
+}
+
+/* Print version information and exit.  */
+
+static void
+print_version (void)
+{
+  fnotice (stdout, "%s %s%s\n", progname, pkgversion_string, version_string);
+  fnotice (stdout, "Copyright %s 2014-2017 Free Software Foundation, Inc.\n",
+           _("(C)"));
+  fnotice (stdout,
+           _("This is free software; see the source for copying conditions.\n"
+             "There is NO warranty; not even for MERCHANTABILITY or \n"
+             "FITNESS FOR A PARTICULAR PURPOSE.\n\n"));
+  exit (SUCCESS_EXIT_CODE);
+}
+
+static const struct option options[] =
+{
+  { "help",                 no_argument,       NULL, 'h' },
+  { "version",              no_argument,       NULL, 'v' },
+  { 0, 0, 0, 0 }
+};
+
+/* Process args, return index to first non-arg.  */
+
+static int
+process_args (int argc, char **argv)
+{
+  int opt;
+
+  while ((opt = getopt_long (argc, argv, "+hv", options, NULL)) != -1)
+    {
+      switch (opt)
+        {
+        case 'h':
+          print_usage (false);
+          /* Print_usage will exit.  */
+	  /* FALLTHRU */
+        case 'v':
+          print_version ();
+          /* Print_version will exit.  */
+	  /* FALLTHRU */
+        default:
+          print_usage (true);
+          /* Print_usage will exit.  */
+        }
+    }
+
+  return optind;
+}
+
+/* Main function for gcov-tool.  */
+
+int
+main (int argc, char **argv)
+{
+  const char *p;
+  const char *sub_command;
+
+  p = argv[0] + strlen (argv[0]);
+  while (p != argv[0] && !IS_DIR_SEPARATOR (p[-1]))
+    --p;
+  progname = p;
+
+  xmalloc_set_program_name (progname);
+
+  /* Unlock the stdio streams.  */
+  unlock_std_streams ();
+
+  gcc_init_libintl ();
+
+  diagnostic_initialize (global_dc, 0);
+
+  /* Handle response files.  */
+  expandargv (&argc, &argv);
+
+  process_args (argc, argv);
+  if (optind >= argc)
+    print_usage (true);
+
+  sub_command = argv[optind];
+
+  if (!strcmp (sub_command, "merge"))
+    return do_merge (argc - optind, argv + optind);
+  else if (!strcmp (sub_command, "rewrite"))
+    return do_rewrite (argc - optind, argv + optind);
+  else if (!strcmp (sub_command, "overlap"))
+    return do_overlap (argc - optind, argv + optind);
+
+  print_usage (true);
+}