gdb/common/btrace-common.c

   1 /* Copyright (C) 2014-2015 Free Software Foundation, Inc.
   2
   3    Contributed by Intel Corp. <markus.t.metzger@intel.com>
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "common-defs.h"
  21 #include "btrace-common.h"
  22
  23
  24 /* See btrace-common.h.  */
  25
  26 const char *
  27 btrace_format_string (enum btrace_format format)
  28 {
  29   switch (format)
  30     {
  31     case BTRACE_FORMAT_NONE:
  32       return _("No or unknown format");
  33
  34     case BTRACE_FORMAT_BTS:
  35       return _("Branch Trace Store");
  36
  37     case BTRACE_FORMAT_PT:
  38       return _("Intel(R) Processor Trace");
  39     }
  40
  41   internal_error (__FILE__, __LINE__, _("Unknown branch trace format"));
  42 }
  43
  44 /* See btrace-common.h.  */
  45
  46 void
  47 btrace_data_init (struct btrace_data *data)
  48 {
  49   data->format = BTRACE_FORMAT_NONE;
  50 }
  51
  52 /* See btrace-common.h.  */
  53
  54 void
  55 btrace_data_fini (struct btrace_data *data)
  56 {
  57   switch (data->format)
  58     {
  59     case BTRACE_FORMAT_NONE:
  60       /* Nothing to do.  */
  61       return;
  62
  63     case BTRACE_FORMAT_BTS:
  64       VEC_free (btrace_block_s, data->variant.bts.blocks);
  65       return;
  66
  67     case BTRACE_FORMAT_PT:
  68       xfree (data->variant.pt.data);
  69       return;
  70     }
  71
  72   internal_error (__FILE__, __LINE__, _("Unkown branch trace format."));
  73 }
  74
  75 /* See btrace-common.h.  */
  76
  77 int
  78 btrace_data_empty (struct btrace_data *data)
  79 {
  80   switch (data->format)
  81     {
  82     case BTRACE_FORMAT_NONE:
  83       return 1;
  84
  85     case BTRACE_FORMAT_BTS:
  86       return VEC_empty (btrace_block_s, data->variant.bts.blocks);
  87
  88     case BTRACE_FORMAT_PT:
  89       return (data->variant.pt.size == 0);
  90     }
  91
  92   internal_error (__FILE__, __LINE__, _("Unkown branch trace format."));
  93 }
  94
  95 /* See btrace-common.h.  */
  96
  97 void
  98 btrace_data_clear (struct btrace_data *data)
  99 {
 100   btrace_data_fini (data);
 101   btrace_data_init (data);
 102 }
 103
 104 /* See btrace-common.h.  */
 105
 106 int
 107 btrace_data_append (struct btrace_data *dst,
 108                     const struct btrace_data *src)
 109 {
 110   switch (src->format)
 111     {
 112     case BTRACE_FORMAT_NONE:
 113       return 0;
 114
 115     case BTRACE_FORMAT_BTS:
 116       switch (dst->format)
 117         {
 118         default:
 119           return -1;
 120
 121         case BTRACE_FORMAT_NONE:
 122           dst->format = BTRACE_FORMAT_BTS;
 123           dst->variant.bts.blocks = NULL;
 124
 125           /* Fall-through.  */
 126         case BTRACE_FORMAT_BTS:
 127           {
 128             unsigned int blk;
 129
 130             /* We copy blocks in reverse order to have the oldest block at
 131                index zero.  */
 132             blk = VEC_length (btrace_block_s, src->variant.bts.blocks);
 133             while (blk != 0)
 134               {
 135                 btrace_block_s *block;
 136
 137                 block = VEC_index (btrace_block_s, src->variant.bts.blocks,
 138                                    --blk);
 139
 140                 VEC_safe_push (btrace_block_s, dst->variant.bts.blocks, block);
 141               }
 142           }
 143         }
 144       return 0;
 145
 146     case BTRACE_FORMAT_PT:
 147       switch (dst->format)
 148         {
 149         default:
 150           return -1;
 151
 152         case BTRACE_FORMAT_NONE:
 153           dst->format = BTRACE_FORMAT_PT;
 154           dst->variant.pt.data = NULL;
 155           dst->variant.pt.size = 0;
 156
 157           /* fall-through.  */
 158         case BTRACE_FORMAT_PT:
 159           {
 160             gdb_byte *data;
 161             size_t size;
 162
 163             size = src->variant.pt.size + dst->variant.pt.size;
 164             data = (gdb_byte *) xmalloc (size);
 165
 166             memcpy (data, dst->variant.pt.data, dst->variant.pt.size);
 167             memcpy (data + dst->variant.pt.size, src->variant.pt.data,
 168                     src->variant.pt.size);
 169
 170             xfree (dst->variant.pt.data);
 171
 172             dst->variant.pt.data = data;
 173             dst->variant.pt.size = size;
 174           }
 175         }
 176       return 0;
 177     }
 178
 179   internal_error (__FILE__, __LINE__, _("Unkown branch trace format."));
 180 }