gdb/gdbsupport/btrace-common.c

   1 /* Copyright (C) 2014-2019 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 Processor Trace");
  39     }
  40
  41   internal_error (__FILE__, __LINE__, _("Unknown branch trace format"));
  42 }
  43
  44 /* See btrace-common.h.  */
  45
  46 const char *
  47 btrace_format_short_string (enum btrace_format format)
  48 {
  49   switch (format)
  50     {
  51     case BTRACE_FORMAT_NONE:
  52       return "unknown";
  53
  54     case BTRACE_FORMAT_BTS:
  55       return "bts";
  56
  57     case BTRACE_FORMAT_PT:
  58       return "pt";
  59     }
  60
  61   internal_error (__FILE__, __LINE__, _("Unknown branch trace format"));
  62 }
  63
  64 /* See btrace-common.h.  */
  65
  66 void
  67 btrace_data::fini ()
  68 {
  69   switch (format)
  70     {
  71     case BTRACE_FORMAT_NONE:
  72       /* Nothing to do.  */
  73       return;
  74
  75     case BTRACE_FORMAT_BTS:
  76       VEC_free (btrace_block_s, variant.bts.blocks);
  77       return;
  78
  79     case BTRACE_FORMAT_PT:
  80       xfree (variant.pt.data);
  81       return;
  82     }
  83
  84   internal_error (__FILE__, __LINE__, _("Unkown branch trace format."));
  85 }
  86
  87 /* See btrace-common.h.  */
  88
  89 bool
  90 btrace_data::empty () const
  91 {
  92   switch (format)
  93     {
  94     case BTRACE_FORMAT_NONE:
  95       return true;
  96
  97     case BTRACE_FORMAT_BTS:
  98       return VEC_empty (btrace_block_s, variant.bts.blocks);
  99
 100     case BTRACE_FORMAT_PT:
 101       return (variant.pt.size == 0);
 102     }
 103
 104   internal_error (__FILE__, __LINE__, _("Unkown branch trace format."));
 105 }
 106
 107 /* See btrace-common.h.  */
 108
 109 void
 110 btrace_data::clear ()
 111 {
 112   fini ();
 113   format = BTRACE_FORMAT_NONE;
 114 }
 115
 116 /* See btrace-common.h.  */
 117
 118 int
 119 btrace_data_append (struct btrace_data *dst,
 120                     const struct btrace_data *src)
 121 {
 122   switch (src->format)
 123     {
 124     case BTRACE_FORMAT_NONE:
 125       return 0;
 126
 127     case BTRACE_FORMAT_BTS:
 128       switch (dst->format)
 129         {
 130         default:
 131           return -1;
 132
 133         case BTRACE_FORMAT_NONE:
 134           dst->format = BTRACE_FORMAT_BTS;
 135           dst->variant.bts.blocks = NULL;
 136
 137           /* Fall-through.  */
 138         case BTRACE_FORMAT_BTS:
 139           {
 140             unsigned int blk;
 141
 142             /* We copy blocks in reverse order to have the oldest block at
 143                index zero.  */
 144             blk = VEC_length (btrace_block_s, src->variant.bts.blocks);
 145             while (blk != 0)
 146               {
 147                 btrace_block_s *block;
 148
 149                 block = VEC_index (btrace_block_s, src->variant.bts.blocks,
 150                                    --blk);
 151
 152                 VEC_safe_push (btrace_block_s, dst->variant.bts.blocks, block);
 153               }
 154           }
 155         }
 156       return 0;
 157
 158     case BTRACE_FORMAT_PT:
 159       switch (dst->format)
 160         {
 161         default:
 162           return -1;
 163
 164         case BTRACE_FORMAT_NONE:
 165           dst->format = BTRACE_FORMAT_PT;
 166           dst->variant.pt.data = NULL;
 167           dst->variant.pt.size = 0;
 168
 169           /* fall-through.  */
 170         case BTRACE_FORMAT_PT:
 171           {
 172             gdb_byte *data;
 173             size_t size;
 174
 175             size = src->variant.pt.size + dst->variant.pt.size;
 176             data = (gdb_byte *) xmalloc (size);
 177
 178             memcpy (data, dst->variant.pt.data, dst->variant.pt.size);
 179             memcpy (data + dst->variant.pt.size, src->variant.pt.data,
 180                     src->variant.pt.size);
 181
 182             xfree (dst->variant.pt.data);
 183
 184             dst->variant.pt.data = data;
 185             dst->variant.pt.size = size;
 186           }
 187         }
 188       return 0;
 189     }
 190
 191   internal_error (__FILE__, __LINE__, _("Unkown branch trace format."));
 192 }