lttv/ltt/event.c

   1 /* This file is part of the Linux Trace Toolkit viewer
   2  * Copyright (C) 2007 Mathieu Desnoyers
   3  *
   4  * Complete rewrite from the original version made by XangXiu Yang.
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License Version 2.1 as published by the Free Software Foundation.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the
  17  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18  * Boston, MA 02111-1307, USA.
  19  */
  20
  21 #ifdef HAVE_CONFIG_H
  22 #include <config.h>
  23 #endif
  24
  25 #include <glib.h>
  26
  27 #include <ltt/event.h>
  28 #include <ltt/ltt-types.h>
  29 #include <ltt/ltt-private.h>
  30 #include <ltt/marker.h>
  31 #include <ltt/marker-field.h>
  32
  33 /*****************************************************************************
  34  *Function name
  35  *    ltt_event_position_get : get the event position data
  36  *Input params
  37  *    e                  : an instance of an event type
  38  *    ep                 : a pointer to event's position structure
  39  *    tf                 : tracefile pointer
  40  *    block              : current block
  41  *    offset             : current offset
  42  *    tsc                : current tsc
  43  ****************************************************************************/
  44 void ltt_event_position_get(LttEventPosition *ep, LttTracefile **tf,
  45         guint *block, guint *offset, guint64 *tsc)
  46 {
  47   *tf = ep->tracefile;
  48   *block = ep->block;
  49   *offset = ep->offset;
  50   *tsc = ep->tsc;
  51 }
  52
  53
  54 void ltt_event_position_set(LttEventPosition *ep, LttTracefile *tf,
  55         guint block, guint offset, guint64 tsc)
  56 {
  57   ep->tracefile = tf;
  58   ep->block = block;
  59   ep->offset = offset;
  60   ep->tsc = tsc;
  61 }
  62
  63
  64 /*****************************************************************************
  65  *Function name
  66  *    ltt_event_position : get the event's position
  67  *Input params
  68  *    e                  : an instance of an event type
  69  *    ep                 : a pointer to event's position structure
  70  ****************************************************************************/
  71
  72 void ltt_event_position(LttEvent *e, LttEventPosition *ep)
  73 {
  74   ep->tracefile = e->tracefile;
  75   ep->block = e->block;
  76   ep->offset = e->offset;
  77   ep->tsc = e->tsc;
  78 }
  79
  80 LttEventPosition * ltt_event_position_new()
  81 {
  82   return g_new(LttEventPosition, 1);
  83 }
  84
  85
  86 /*****************************************************************************
  87  * Function name
  88  *    ltt_event_position_compare : compare two positions
  89  *    A NULL value is infinite.
  90  * Input params
  91  *    ep1                    : a pointer to event's position structure
  92  *    ep2                    : a pointer to event's position structure
  93  * Return
  94  *    -1 is ep1 < ep2
  95  *    1 if ep1 > ep2
  96  *    0 if ep1 == ep2
  97  ****************************************************************************/
  98
  99
 100 gint ltt_event_position_compare(const LttEventPosition *ep1,
 101                                 const LttEventPosition *ep2)
 102 {
 103   if(ep1 == NULL && ep2 == NULL)
 104       return 0;
 105   if(ep1 != NULL && ep2 == NULL)
 106       return -1;
 107   if(ep1 == NULL && ep2 != NULL)
 108       return 1;
 109
 110    if(ep1->tracefile != ep2->tracefile)
 111     g_error("ltt_event_position_compare on different tracefiles makes no sense");
 112
 113   if(ep1->block < ep2->block)
 114     return -1;
 115   if(ep1->block > ep2->block)
 116     return 1;
 117   if(ep1->offset < ep2->offset)
 118     return -1;
 119   if(ep1->offset > ep2->offset)
 120     return 1;
 121   return 0;
 122 }
 123
 124 /*****************************************************************************
 125  * Function name
 126  *    ltt_event_position_copy : copy position
 127  * Input params
 128  *    src                    : a pointer to event's position structure source
 129  *    dest                   : a pointer to event's position structure dest
 130  * Return
 131  *    void
 132  ****************************************************************************/
 133 void ltt_event_position_copy(LttEventPosition *dest,
 134                              const LttEventPosition *src)
 135 {
 136   if(src == NULL)
 137     dest = NULL;
 138   else
 139     *dest = *src;
 140 }
 141
 142
 143
 144 LttTracefile *ltt_event_position_tracefile(LttEventPosition *ep)
 145 {
 146   return ep->tracefile;
 147 }
 148
 149 /*****************************************************************************
 150  * These functions extract data from an event after architecture specific
 151  * conversions
 152  ****************************************************************************/
 153 guint32 ltt_event_get_unsigned(LttEvent *e, struct marker_field *f)
 154 {
 155   gboolean reverse_byte_order;
 156
 157   if(unlikely(f->attributes & LTT_ATTRIBUTE_NETWORK_BYTE_ORDER)) {
 158     reverse_byte_order = (g_ntohs(0x1) != 0x1);
 159   } else {
 160     reverse_byte_order = LTT_GET_BO(e->tracefile);
 161   }
 162
 163   switch(f->size) {
 164   case 1:
 165     {
 166       guint8 x = *(guint8 *)(e->data + f->offset);
 167       return (guint32) x;
 168     }
 169     break;
 170   case 2:
 171     return (guint32)ltt_get_uint16(reverse_byte_order, e->data + f->offset);
 172     break;
 173   case 4:
 174     return (guint32)ltt_get_uint32(reverse_byte_order, e->data + f->offset);
 175     break;
 176   case 8:
 177   default:
 178     g_critical("ltt_event_get_unsigned : field size %li unknown", f->size);
 179     return 0;
 180     break;
 181   }
 182 }
 183
 184 gint32 ltt_event_get_int(LttEvent *e, struct marker_field *f)
 185 {
 186   gboolean reverse_byte_order;
 187   if(unlikely(f->attributes & LTT_ATTRIBUTE_NETWORK_BYTE_ORDER)) {
 188     reverse_byte_order = (g_ntohs(0x1) != 0x1);
 189   } else {
 190     reverse_byte_order = LTT_GET_BO(e->tracefile);
 191   }
 192
 193   switch(f->size) {
 194   case 1:
 195     {
 196       gint8 x = *(gint8 *)(e->data + f->offset);
 197       return (gint32) x;
 198     }
 199     break;
 200   case 2:
 201     return (gint32)ltt_get_int16(reverse_byte_order, e->data + f->offset);
 202     break;
 203   case 4:
 204     return (gint32)ltt_get_int32(reverse_byte_order, e->data + f->offset);
 205     break;
 206   case 8:
 207   default:
 208     g_critical("ltt_event_get_int : field size %li unknown", f->size);
 209     return 0;
 210     break;
 211   }
 212 }
 213
 214 guint64 ltt_event_get_long_unsigned(LttEvent *e, struct marker_field *f)
 215 {
 216   gboolean reverse_byte_order;
 217   if(unlikely(f->attributes & LTT_ATTRIBUTE_NETWORK_BYTE_ORDER)) {
 218     reverse_byte_order = (g_ntohs(0x1) != 0x1);
 219   } else {
 220     reverse_byte_order = LTT_GET_BO(e->tracefile);
 221   }
 222
 223   switch(f->size) {
 224   case 1:
 225     {
 226       guint8 x = *(guint8 *)(e->data + f->offset);
 227       return (guint64) x;
 228     }
 229     break;
 230   case 2:
 231     return (guint64)ltt_get_uint16(reverse_byte_order, e->data + f->offset);
 232     break;
 233   case 4:
 234     return (guint64)ltt_get_uint32(reverse_byte_order, e->data + f->offset);
 235     break;
 236   case 8:
 237     return ltt_get_uint64(reverse_byte_order, e->data + f->offset);
 238     break;
 239   default:
 240     g_critical("ltt_event_get_long_unsigned : field size %li unknown", f->size);
 241     return 0;
 242     break;
 243   }
 244 }
 245
 246 gint64 ltt_event_get_long_int(LttEvent *e, struct marker_field *f)
 247 {
 248   gboolean reverse_byte_order;
 249   if(unlikely(f->attributes & LTT_ATTRIBUTE_NETWORK_BYTE_ORDER)) {
 250     reverse_byte_order = (g_ntohs(0x1) != 0x1);
 251   } else {
 252     reverse_byte_order = LTT_GET_BO(e->tracefile);
 253   }
 254
 255   switch(f->size) {
 256   case 1:
 257     {
 258       gint8 x = *(gint8 *)(e->data + f->offset);
 259       return (gint64) x;
 260     }
 261     break;
 262   case 2:
 263     return (gint64)ltt_get_int16(reverse_byte_order, e->data + f->offset);
 264     break;
 265   case 4:
 266     return (gint64)ltt_get_int32(reverse_byte_order, e->data + f->offset);
 267     break;
 268   case 8:
 269     return ltt_get_int64(reverse_byte_order, e->data + f->offset);
 270     break;
 271   default:
 272     g_critical("ltt_event_get_long_int : field size %li unknown", f->size);
 273     return 0;
 274     break;
 275   }
 276 }
 277
 278 #if 0
 279 float ltt_event_get_float(LttEvent *e, struct marker_field *f)
 280 {
 281   gboolean reverse_byte_order;
 282   if(unlikely(f->attributes & LTT_ATTRIBUTE_NETWORK_BYTE_ORDER)) {
 283     reverse_byte_order = (g_ntohs(0x1) != 0x1);
 284   } else {
 285     g_assert(LTT_HAS_FLOAT(e->tracefile));
 286     reverse_byte_order = LTT_GET_FLOAT_BO(e->tracefile);
 287   }
 288
 289   g_assert(f->field_type.type_class == LTT_FLOAT && f->size == 4);
 290
 291   if(reverse_byte_order == 0) return *(float *)(e->data + f->offset);
 292   else{
 293     void *ptr = e->data + f->offset;
 294     guint32 value = bswap_32(*(guint32*)ptr);
 295     return *(float*)&value;
 296   }
 297 }
 298
 299 double ltt_event_get_double(LttEvent *e, struct marker_field *f)
 300 {
 301   gboolean reverse_byte_order;
 302   if(unlikely(f->attributes & LTT_ATTRIBUTE_NETWORK_BYTE_ORDER)) {
 303     reverse_byte_order = (g_ntohs(0x1) != 0x1);
 304   } else {
 305     g_assert(LTT_HAS_FLOAT(e->tracefile));
 306     reverse_byte_order = LTT_GET_FLOAT_BO(e->tracefile);
 307   }
 308
 309   if(f->size == 4)
 310     return ltt_event_get_float(e, f);
 311
 312   g_assert(f->field_type.type_class == LTT_FLOAT && f->size == 8);
 313
 314   if(reverse_byte_order == 0) return *(double *)(e->data + f->offset);
 315   else {
 316     void *ptr = e->data + f->offset;
 317     guint64 value = bswap_64(*(guint64*)ptr);
 318     return *(double*)&value;
 319   }
 320 }
 321 #endif
 322
 323 /*****************************************************************************
 324  * The string obtained is only valid until the next read from
 325  * the same tracefile. We reference directly the buffers.
 326  ****************************************************************************/
 327 gchar *ltt_event_get_string(LttEvent *e, struct marker_field *f)
 328 {
 329   g_assert(f->type == LTT_TYPE_STRING);
 330
 331   //caused memory leaks
 332   //return (gchar*)g_strdup((gchar*)(e->data + f->offset));
 333   return (gchar*)(e->data + f->offset);
 334 }
 335
 336