src/tracer.c

   1 // SPDX-License-Identifier: MIT
   2 /*
   3  * Copyright 2022 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   4  */
   5
   6 #include <stdint.h>
   7 #include <inttypes.h>
   8 #include <stdlib.h>
   9 #include <stdio.h>
  10 #include <stdbool.h>
  11 #include <string.h>
  12
  13 #include <side/trace.h>
  14
  15 enum tracer_display_base {
  16         TRACER_DISPLAY_BASE_2,
  17         TRACER_DISPLAY_BASE_8,
  18         TRACER_DISPLAY_BASE_10,
  19         TRACER_DISPLAY_BASE_16,
  20 };
  21
  22 static struct side_tracer_handle *tracer_handle;
  23
  24 static
  25 void tracer_print_struct(const struct side_type *type_desc, const struct side_arg_vec *side_arg_vec);
  26 static
  27 void tracer_print_array(const struct side_type *type_desc, const struct side_arg_vec *side_arg_vec);
  28 static
  29 void tracer_print_vla(const struct side_type *type_desc, const struct side_arg_vec *side_arg_vec);
  30 static
  31 void tracer_print_vla_visitor(const struct side_type *type_desc, void *app_ctx);
  32 static
  33 void tracer_print_dynamic(const struct side_arg *dynamic_item);
  34 static
  35 uint32_t tracer_print_gather_bool_type(const struct side_type_gather *type_gather, const void *_ptr);
  36 static
  37 uint32_t tracer_print_gather_byte_type(const struct side_type_gather *type_gather, const void *_ptr);
  38 static
  39 uint32_t tracer_print_gather_integer_type(const struct side_type_gather *type_gather, const void *_ptr,
  40                 enum tracer_display_base default_base);
  41 static
  42 uint32_t tracer_print_gather_float_type(const struct side_type_gather *type_gather, const void *_ptr);
  43 static
  44 uint32_t tracer_print_gather_struct(const struct side_type_gather *type_gather, const void *_ptr);
  45 static
  46 uint32_t tracer_print_gather_array(const struct side_type_gather *type_gather, const void *_ptr);
  47 static
  48 uint32_t tracer_print_gather_vla(const struct side_type_gather *type_gather, const void *_ptr,
  49                 const void *_length_ptr);
  50 static
  51 void tracer_print_type(const struct side_type *type_desc, const struct side_arg *item);
  52
  53 static
  54 int64_t get_attr_integer_value(const struct side_attr *attr)
  55 {
  56         int64_t val;
  57
  58         switch (attr->value.type) {
  59         case SIDE_ATTR_TYPE_U8:
  60                 val = attr->value.u.integer_value.side_u8;
  61                 break;
  62         case SIDE_ATTR_TYPE_U16:
  63                 val = attr->value.u.integer_value.side_u16;
  64                 break;
  65         case SIDE_ATTR_TYPE_U32:
  66                 val = attr->value.u.integer_value.side_u32;
  67                 break;
  68         case SIDE_ATTR_TYPE_U64:
  69                 val = attr->value.u.integer_value.side_u64;
  70                 break;
  71         case SIDE_ATTR_TYPE_S8:
  72                 val = attr->value.u.integer_value.side_s8;
  73                 break;
  74         case SIDE_ATTR_TYPE_S16:
  75                 val = attr->value.u.integer_value.side_s16;
  76                 break;
  77         case SIDE_ATTR_TYPE_S32:
  78                 val = attr->value.u.integer_value.side_s32;
  79                 break;
  80         case SIDE_ATTR_TYPE_S64:
  81                 val = attr->value.u.integer_value.side_s64;
  82                 break;
  83         default:
  84                 fprintf(stderr, "Unexpected attribute type\n");
  85                 abort();
  86         }
  87         return val;
  88 }
  89
  90 static
  91 enum tracer_display_base get_attr_display_base(const struct side_attr *_attr, uint32_t nr_attr,
  92                                 enum tracer_display_base default_base)
  93 {
  94         uint32_t i;
  95
  96         for (i = 0; i < nr_attr; i++) {
  97                 const struct side_attr *attr = &_attr[i];
  98
  99                 if (!strcmp(attr->key, "std.integer.base")) {
 100                         int64_t val = get_attr_integer_value(attr);
 101
 102                         switch (val) {
 103                         case 2:
 104                                 return TRACER_DISPLAY_BASE_2;
 105                         case 8:
 106                                 return TRACER_DISPLAY_BASE_8;
 107                         case 10:
 108                                 return TRACER_DISPLAY_BASE_10;
 109                         case 16:
 110                                 return TRACER_DISPLAY_BASE_16;
 111                         default:
 112                                 fprintf(stderr, "Unexpected integer display base: %" PRId64 "\n", val);
 113                                 abort();
 114                         }
 115                 }
 116         }
 117         return default_base;    /* Default */
 118 }
 119
 120 static
 121 bool type_to_host_reverse_bo(const struct side_type *type_desc)
 122 {
 123         switch (type_desc->type) {
 124         case SIDE_TYPE_U8:
 125         case SIDE_TYPE_S8:
 126         case SIDE_TYPE_BYTE:
 127                 return false;
 128         case SIDE_TYPE_U16:
 129         case SIDE_TYPE_U32:
 130         case SIDE_TYPE_U64:
 131         case SIDE_TYPE_S16:
 132         case SIDE_TYPE_S32:
 133         case SIDE_TYPE_S64:
 134         case SIDE_TYPE_POINTER:
 135                 if (type_desc->u.side_integer.byte_order != SIDE_TYPE_BYTE_ORDER_HOST)
 136                         return true;
 137                 else
 138                         return false;
 139                 break;
 140         case SIDE_TYPE_FLOAT_BINARY16:
 141         case SIDE_TYPE_FLOAT_BINARY32:
 142         case SIDE_TYPE_FLOAT_BINARY64:
 143         case SIDE_TYPE_FLOAT_BINARY128:
 144                 if (type_desc->u.side_float.byte_order != SIDE_TYPE_FLOAT_WORD_ORDER_HOST)
 145                         return true;
 146                 else
 147                         return false;
 148                 break;
 149         default:
 150                 fprintf(stderr, "Unexpected type\n");
 151                 abort();
 152         }
 153 }
 154
 155 static
 156 void tracer_print_attr_type(const char *separator, const struct side_attr *attr)
 157 {
 158         printf("{ key%s \"%s\", value%s ", separator, attr->key, separator);
 159         switch (attr->value.type) {
 160         case SIDE_ATTR_TYPE_BOOL:
 161                 printf("%s", attr->value.u.bool_value ? "true" : "false");
 162                 break;
 163         case SIDE_ATTR_TYPE_U8:
 164                 printf("%" PRIu8, attr->value.u.integer_value.side_u8);
 165                 break;
 166         case SIDE_ATTR_TYPE_U16:
 167                 printf("%" PRIu16, attr->value.u.integer_value.side_u16);
 168                 break;
 169         case SIDE_ATTR_TYPE_U32:
 170                 printf("%" PRIu32, attr->value.u.integer_value.side_u32);
 171                 break;
 172         case SIDE_ATTR_TYPE_U64:
 173                 printf("%" PRIu64, attr->value.u.integer_value.side_u64);
 174                 break;
 175         case SIDE_ATTR_TYPE_S8:
 176                 printf("%" PRId8, attr->value.u.integer_value.side_s8);
 177                 break;
 178         case SIDE_ATTR_TYPE_S16:
 179                 printf("%" PRId16, attr->value.u.integer_value.side_s16);
 180                 break;
 181         case SIDE_ATTR_TYPE_S32:
 182                 printf("%" PRId32, attr->value.u.integer_value.side_s32);
 183                 break;
 184         case SIDE_ATTR_TYPE_S64:
 185                 printf("%" PRId64, attr->value.u.integer_value.side_s64);
 186                 break;
 187         case SIDE_ATTR_TYPE_FLOAT_BINARY16:
 188 #if __HAVE_FLOAT16
 189                 printf("%g", (double) attr->value.u.float_value.side_float_binary16);
 190                 break;
 191 #else
 192                 fprintf(stderr, "ERROR: Unsupported binary16 float type\n");
 193                 abort();
 194 #endif
 195         case SIDE_ATTR_TYPE_FLOAT_BINARY32:
 196 #if __HAVE_FLOAT32
 197                 printf("%g", (double) attr->value.u.float_value.side_float_binary32);
 198                 break;
 199 #else
 200                 fprintf(stderr, "ERROR: Unsupported binary32 float type\n");
 201                 abort();
 202 #endif
 203         case SIDE_ATTR_TYPE_FLOAT_BINARY64:
 204 #if __HAVE_FLOAT64
 205                 printf("%g", (double) attr->value.u.float_value.side_float_binary64);
 206                 break;
 207 #else
 208                 fprintf(stderr, "ERROR: Unsupported binary64 float type\n");
 209                 abort();
 210 #endif
 211         case SIDE_ATTR_TYPE_FLOAT_BINARY128:
 212 #if __HAVE_FLOAT128
 213                 printf("%Lg", (long double) attr->value.u.float_value.side_float_binary128);
 214                 break;
 215 #else
 216                 fprintf(stderr, "ERROR: Unsupported binary128 float type\n");
 217                 abort();
 218 #endif
 219         case SIDE_ATTR_TYPE_STRING:
 220                 printf("\"%s\"", (const char *)(uintptr_t) attr->value.u.string_value);
 221                 break;
 222         default:
 223                 fprintf(stderr, "ERROR: <UNKNOWN ATTRIBUTE TYPE>");
 224                 abort();
 225         }
 226         printf(" }");
 227 }
 228
 229 static
 230 void print_attributes(const char *prefix_str, const char *separator,
 231                 const struct side_attr *attr, uint32_t nr_attr)
 232 {
 233         uint32_t i;
 234
 235         if (!nr_attr)
 236                 return;
 237         printf("%s%s [ ", prefix_str, separator);
 238         for (i = 0; i < nr_attr; i++) {
 239                 printf("%s", i ? ", " : "");
 240                 tracer_print_attr_type(separator, &attr[i]);
 241         }
 242         printf(" ]");
 243 }
 244
 245 static
 246 void print_enum(const struct side_type *type_desc, const struct side_arg *item)
 247 {
 248         const struct side_enum_mappings *mappings = type_desc->u.side_enum.mappings;
 249         const struct side_type *elem_type = type_desc->u.side_enum.elem_type;
 250         uint32_t i, print_count = 0;
 251         int64_t value;
 252
 253         if (elem_type->type != item->type) {
 254                 fprintf(stderr, "ERROR: Unexpected enum element type\n");
 255                 abort();
 256         }
 257         switch (item->type) {
 258         case SIDE_TYPE_U8:
 259                 value = (int64_t) item->u.side_static.integer_value.side_u8;
 260                 break;
 261         case SIDE_TYPE_U16:
 262         {
 263                 uint16_t v;
 264
 265                 v = item->u.side_static.integer_value.side_u16;
 266                 if (type_to_host_reverse_bo(elem_type))
 267                         v = side_bswap_16(v);
 268                 value = (int64_t) v;
 269                 break;
 270         }
 271         case SIDE_TYPE_U32:
 272         {
 273                 uint32_t v;
 274
 275                 v = item->u.side_static.integer_value.side_u32;
 276                 if (type_to_host_reverse_bo(elem_type))
 277                         v = side_bswap_32(v);
 278                 value = (int64_t) v;
 279                 break;
 280         }
 281         case SIDE_TYPE_U64:
 282         {
 283                 uint64_t v;
 284
 285                 v = item->u.side_static.integer_value.side_u64;
 286                 if (type_to_host_reverse_bo(elem_type))
 287                         v = side_bswap_64(v);
 288                 value = (int64_t) v;
 289                 break;
 290         }
 291         case SIDE_TYPE_S8:
 292                 value = (int64_t) item->u.side_static.integer_value.side_s8;
 293                 break;
 294         case SIDE_TYPE_S16:
 295         {
 296                 int16_t v;
 297
 298                 v = item->u.side_static.integer_value.side_s16;
 299                 if (type_to_host_reverse_bo(elem_type))
 300                         v = side_bswap_16(v);
 301                 value = (int64_t) v;
 302                 break;
 303         }
 304         case SIDE_TYPE_S32:
 305         {
 306                 int32_t v;
 307
 308                 v = item->u.side_static.integer_value.side_s32;
 309                 if (type_to_host_reverse_bo(elem_type))
 310                         v = side_bswap_32(v);
 311                 value = (int64_t) v;
 312                 break;
 313         }
 314         case SIDE_TYPE_S64:
 315         {
 316                 int64_t v;
 317
 318                 v = item->u.side_static.integer_value.side_s64;
 319                 if (type_to_host_reverse_bo(elem_type))
 320                         v = side_bswap_64(v);
 321                 value = v;
 322                 break;
 323         }
 324         default:
 325                 fprintf(stderr, "ERROR: Unexpected enum element type\n");
 326                 abort();
 327         }
 328         print_attributes("attr", ":", mappings->attr, mappings->nr_attr);
 329         printf("%s", mappings->nr_attr ? ", " : "");
 330         tracer_print_type(type_desc->u.side_enum.elem_type, item);
 331         printf(", labels: [ ");
 332         for (i = 0; i < mappings->nr_mappings; i++) {
 333                 const struct side_enum_mapping *mapping = &mappings->mappings[i];
 334
 335                 if (mapping->range_end < mapping->range_begin) {
 336                         fprintf(stderr, "ERROR: Unexpected enum range: %" PRIu64 "-%" PRIu64 "\n",
 337                                 mapping->range_begin, mapping->range_end);
 338                         abort();
 339                 }
 340                 if (value >= mapping->range_begin && value <= mapping->range_end) {
 341                         printf("%s", print_count++ ? ", " : "");
 342                         printf("\"%s\"", mapping->label);
 343                 }
 344         }
 345         if (!print_count)
 346                 printf("<NO LABEL>");
 347         printf(" ]");
 348 }
 349
 350 static
 351 uint32_t enum_elem_type_to_stride(const struct side_type *elem_type)
 352 {
 353         uint32_t stride_bit;
 354
 355         switch (elem_type->type) {
 356         case SIDE_TYPE_U8:      /* Fall-through */
 357         case SIDE_TYPE_BYTE:
 358                 stride_bit = 8;
 359                 break;
 360         case SIDE_TYPE_U16:
 361                 stride_bit = 16;
 362                 break;
 363         case SIDE_TYPE_U32:
 364                 stride_bit = 32;
 365                 break;
 366         case SIDE_TYPE_U64:
 367                 stride_bit = 64;
 368                 break;
 369         default:
 370                 fprintf(stderr, "ERROR: Unexpected enum element type\n");
 371                 abort();
 372         }
 373         return stride_bit;
 374 }
 375
 376 static
 377 void print_enum_bitmap(const struct side_type *type_desc,
 378                 const struct side_arg *item)
 379 {
 380         const struct side_type *elem_type = type_desc->u.side_enum_bitmap.elem_type;
 381         const struct side_enum_bitmap_mappings *side_enum_mappings = type_desc->u.side_enum_bitmap.mappings;
 382         uint32_t i, print_count = 0, stride_bit, nr_items;
 383         bool reverse_byte_order = false;
 384         const struct side_arg *array_item;
 385
 386         switch (elem_type->type) {
 387         case SIDE_TYPE_U8:              /* Fall-through */
 388         case SIDE_TYPE_BYTE:            /* Fall-through */
 389         case SIDE_TYPE_U16:             /* Fall-through */
 390         case SIDE_TYPE_U32:             /* Fall-through */
 391         case SIDE_TYPE_U64:
 392                 stride_bit = enum_elem_type_to_stride(elem_type);
 393                 reverse_byte_order = type_to_host_reverse_bo(elem_type);
 394                 array_item = item;
 395                 nr_items = 1;
 396                 break;
 397         case SIDE_TYPE_ARRAY:
 398                 stride_bit = enum_elem_type_to_stride(elem_type->u.side_array.elem_type);
 399                 reverse_byte_order = type_to_host_reverse_bo(elem_type->u.side_array.elem_type);
 400                 array_item = item->u.side_static.side_array->sav;
 401                 nr_items = type_desc->u.side_array.length;
 402                 break;
 403         case SIDE_TYPE_VLA:
 404                 stride_bit = enum_elem_type_to_stride(elem_type->u.side_vla.elem_type);
 405                 reverse_byte_order = type_to_host_reverse_bo(elem_type->u.side_vla.elem_type);
 406                 array_item = item->u.side_static.side_vla->sav;
 407                 nr_items = item->u.side_static.side_vla->len;
 408                 break;
 409         default:
 410                 fprintf(stderr, "ERROR: Unexpected enum element type\n");
 411                 abort();
 412         }
 413
 414         print_attributes("attr", ":", side_enum_mappings->attr, side_enum_mappings->nr_attr);
 415         printf("%s", side_enum_mappings->nr_attr ? ", " : "");
 416         printf("labels: [ ");
 417         for (i = 0; i < side_enum_mappings->nr_mappings; i++) {
 418                 const struct side_enum_bitmap_mapping *mapping = &side_enum_mappings->mappings[i];
 419                 bool match = false;
 420                 uint64_t bit;
 421
 422                 if (mapping->range_end < mapping->range_begin) {
 423                         fprintf(stderr, "ERROR: Unexpected enum bitmap range: %" PRIu64 "-%" PRIu64 "\n",
 424                                 mapping->range_begin, mapping->range_end);
 425                         abort();
 426                 }
 427                 for (bit = mapping->range_begin; bit <= mapping->range_end; bit++) {
 428                         if (bit > (nr_items * stride_bit) - 1)
 429                                 break;
 430                         switch (stride_bit) {
 431                         case 8:
 432                         {
 433                                 uint8_t v = array_item[bit / 8].u.side_static.integer_value.side_u8;
 434                                 if (v & (1ULL << (bit % 8))) {
 435                                         match = true;
 436                                         goto match;
 437                                 }
 438                                 break;
 439                         }
 440                         case 16:
 441                         {
 442                                 uint16_t v = array_item[bit / 16].u.side_static.integer_value.side_u16;
 443                                 if (reverse_byte_order)
 444                                         v = side_bswap_16(v);
 445                                 if (v & (1ULL << (bit % 16))) {
 446                                         match = true;
 447                                         goto match;
 448                                 }
 449                                 break;
 450                         }
 451                         case 32:
 452                         {
 453                                 uint32_t v = array_item[bit / 32].u.side_static.integer_value.side_u32;
 454                                 if (reverse_byte_order)
 455                                         v = side_bswap_32(v);
 456                                 if (v & (1ULL << (bit % 32))) {
 457                                         match = true;
 458                                         goto match;
 459                                 }
 460                                 break;
 461                         }
 462                         case 64:
 463                         {
 464                                 uint64_t v = array_item[bit / 64].u.side_static.integer_value.side_u64;
 465                                 if (reverse_byte_order)
 466                                         v = side_bswap_64(v);
 467                                 if (v & (1ULL << (bit % 64))) {
 468                                         match = true;
 469                                         goto match;
 470                                 }
 471                                 break;
 472                         }
 473                         default:
 474                                 abort();
 475                         }
 476                 }
 477 match:
 478                 if (match) {
 479                         printf("%s", print_count++ ? ", " : "");
 480                         printf("\"%s\"", mapping->label);
 481                 }
 482         }
 483         if (!print_count)
 484                 printf("<NO LABEL>");
 485         printf(" ]");
 486 }
 487
 488 static
 489 void print_integer_binary(uint64_t v, int bits)
 490 {
 491         int i;
 492
 493         printf("0b");
 494         v <<= 64 - bits;
 495         for (i = 0; i < bits; i++) {
 496                 printf("%c", v & (1ULL << 63) ? '1' : '0');
 497                 v <<= 1;
 498         }
 499 }
 500
 501 static
 502 void tracer_print_type_header(const char *separator,
 503                 const struct side_attr *attr, uint32_t nr_attr)
 504 {
 505         print_attributes("attr", separator, attr, nr_attr);
 506         printf("%s", nr_attr ? ", " : "");
 507         printf("value%s ", separator);
 508 }
 509
 510 static
 511 void tracer_print_type_bool(const char *separator,
 512                 const struct side_type_bool *type_bool,
 513                 const union side_bool_value *value,
 514                 uint16_t offset_bits)
 515 {
 516         uint32_t len_bits;
 517         bool reverse_bo;
 518         uint64_t v;
 519
 520         if (!type_bool->len_bits)
 521                 len_bits = type_bool->bool_size * CHAR_BIT;
 522         else
 523                 len_bits = type_bool->len_bits;
 524         if (len_bits + offset_bits > type_bool->bool_size * CHAR_BIT)
 525                 abort();
 526         reverse_bo = type_bool->byte_order != SIDE_TYPE_BYTE_ORDER_HOST;
 527         switch (type_bool->bool_size) {
 528         case 1:
 529                 v = value->side_bool8;
 530                 break;
 531         case 2:
 532         {
 533                 uint16_t side_u16;
 534
 535                 side_u16 = value->side_bool16;
 536                 if (reverse_bo)
 537                         side_u16 = side_bswap_16(side_u16);
 538                 v = side_u16;
 539                 break;
 540         }
 541         case 4:
 542         {
 543                 uint32_t side_u32;
 544
 545                 side_u32 = value->side_bool32;
 546                 if (reverse_bo)
 547                         side_u32 = side_bswap_32(side_u32);
 548                 v = side_u32;
 549                 break;
 550         }
 551         case 8:
 552         {
 553                 uint64_t side_u64;
 554
 555                 side_u64 = value->side_bool64;
 556                 if (reverse_bo)
 557                         side_u64 = side_bswap_64(side_u64);
 558                 v = side_u64;
 559                 break;
 560         }
 561         default:
 562                 abort();
 563         }
 564         v >>= offset_bits;
 565         if (len_bits < 64)
 566                 v &= (1ULL << len_bits) - 1;
 567         tracer_print_type_header(separator, type_bool->attr, type_bool->nr_attr);
 568         printf("%s", v ? "true" : "false");
 569 }
 570
 571 static
 572 void tracer_print_type_integer(const char *separator,
 573                 const struct side_type_integer *type_integer,
 574                 const union side_integer_value *value,
 575                 uint16_t offset_bits,
 576                 enum tracer_display_base default_base)
 577 {
 578         enum tracer_display_base base;
 579         uint32_t len_bits;
 580         bool reverse_bo;
 581         union {
 582                 uint64_t v_unsigned;
 583                 int64_t v_signed;
 584         } v;
 585
 586         if (!type_integer->len_bits)
 587                 len_bits = type_integer->integer_size * CHAR_BIT;
 588         else
 589                 len_bits = type_integer->len_bits;
 590         if (len_bits + offset_bits > type_integer->integer_size * CHAR_BIT)
 591                 abort();
 592         reverse_bo = type_integer->byte_order != SIDE_TYPE_BYTE_ORDER_HOST;
 593         base = get_attr_display_base(type_integer->attr,
 594                         type_integer->nr_attr,
 595                         default_base);
 596         switch (type_integer->integer_size) {
 597         case 1:
 598                 if (type_integer->signedness)
 599                         v.v_signed = value->side_s8;
 600                 else
 601                         v.v_unsigned = value->side_u8;
 602                 break;
 603         case 2:
 604                 if (type_integer->signedness) {
 605                         int16_t side_s16;
 606
 607                         side_s16 = value->side_s16;
 608                         if (reverse_bo)
 609                                 side_s16 = side_bswap_16(side_s16);
 610                         v.v_signed = side_s16;
 611                 } else {
 612                         uint16_t side_u16;
 613
 614                         side_u16 = value->side_u16;
 615                         if (reverse_bo)
 616                                 side_u16 = side_bswap_16(side_u16);
 617                         v.v_unsigned = side_u16;
 618                 }
 619                 break;
 620         case 4:
 621                 if (type_integer->signedness) {
 622                         int32_t side_s32;
 623
 624                         side_s32 = value->side_s32;
 625                         if (reverse_bo)
 626                                 side_s32 = side_bswap_32(side_s32);
 627                         v.v_signed = side_s32;
 628                 } else {
 629                         uint32_t side_u32;
 630
 631                         side_u32 = value->side_u32;
 632                         if (reverse_bo)
 633                                 side_u32 = side_bswap_32(side_u32);
 634                         v.v_unsigned = side_u32;
 635                 }
 636                 break;
 637         case 8:
 638                 if (type_integer->signedness) {
 639                         int64_t side_s64;
 640
 641                         side_s64 = value->side_s64;
 642                         if (reverse_bo)
 643                                 side_s64 = side_bswap_64(side_s64);
 644                         v.v_signed = side_s64;
 645                 } else {
 646                         uint64_t side_u64;
 647
 648                         side_u64 = value->side_u64;
 649                         if (reverse_bo)
 650                                 side_u64 = side_bswap_64(side_u64);
 651                         v.v_unsigned = side_u64;
 652                 }
 653                 break;
 654         default:
 655                 abort();
 656         }
 657         v.v_unsigned >>= offset_bits;
 658         if (len_bits < 64)
 659                 v.v_unsigned &= (1ULL << len_bits) - 1;
 660         tracer_print_type_header(separator, type_integer->attr, type_integer->nr_attr);
 661         switch (base) {
 662         case TRACER_DISPLAY_BASE_2:
 663                 print_integer_binary(v.v_unsigned, len_bits);
 664                 break;
 665         case TRACER_DISPLAY_BASE_8:
 666                 printf("0%" PRIo64, v.v_unsigned);
 667                 break;
 668         case TRACER_DISPLAY_BASE_10:
 669                 if (type_integer->signedness) {
 670                         /* Sign-extend. */
 671                         if (len_bits < 64) {
 672                                 if (v.v_unsigned & (1ULL << (len_bits - 1)))
 673                                         v.v_unsigned |= ~((1ULL << len_bits) - 1);
 674                         }
 675                         printf("%" PRId64, v.v_signed);
 676                 } else {
 677                         printf("%" PRIu64, v.v_unsigned);
 678                 }
 679                 break;
 680         case TRACER_DISPLAY_BASE_16:
 681                 printf("0x%" PRIx64, v.v_unsigned);
 682                 break;
 683         default:
 684                 abort();
 685         }
 686 }
 687
 688 static
 689 void tracer_print_type_float(const char *separator,
 690                 const struct side_type_float *type_float,
 691                 const union side_float_value *value)
 692 {
 693         bool reverse_bo;
 694
 695         reverse_bo = type_float->byte_order != SIDE_TYPE_FLOAT_WORD_ORDER_HOST;
 696         tracer_print_type_header(separator, type_float->attr, type_float->nr_attr);
 697         switch (type_float->float_size) {
 698         case 2:
 699         {
 700 #if __HAVE_FLOAT16
 701                 union {
 702                         _Float16 f;
 703                         uint16_t u;
 704                 } float16 = {
 705                         .f = value->side_float_binary16,
 706                 };
 707
 708                 if (reverse_bo)
 709                         float16.u = side_bswap_16(float16.u);
 710                 tracer_print_type_header(":", type_desc->u.side_float.attr, type_desc->u.side_float.nr_attr);
 711                 printf("%g", (double) float16.f);
 712                 break;
 713 #else
 714                 fprintf(stderr, "ERROR: Unsupported binary16 float type\n");
 715                 abort();
 716 #endif
 717         }
 718         case 4:
 719         {
 720 #if __HAVE_FLOAT32
 721                 union {
 722                         _Float32 f;
 723                         uint32_t u;
 724                 } float32 = {
 725                         .f = value->side_float_binary32,
 726                 };
 727
 728                 if (reverse_bo)
 729                         float32.u = side_bswap_32(float32.u);
 730                 printf("%g", (double) float32.f);
 731                 break;
 732 #else
 733                 fprintf(stderr, "ERROR: Unsupported binary32 float type\n");
 734                 abort();
 735 #endif
 736         }
 737         case 8:
 738         {
 739 #if __HAVE_FLOAT64
 740                 union {
 741                         _Float64 f;
 742                         uint64_t u;
 743                 } float64 = {
 744                         .f = value->side_float_binary64,
 745                 };
 746
 747                 if (reverse_bo)
 748                         float64.u = side_bswap_64(float64.u);
 749                 printf("%g", (double) float64.f);
 750                 break;
 751 #else
 752                 fprintf(stderr, "ERROR: Unsupported binary64 float type\n");
 753                 abort();
 754 #endif
 755         }
 756         case 16:
 757         {
 758 #if __HAVE_FLOAT128
 759                 union {
 760                         _Float128 f;
 761                         char arr[16];
 762                 } float128 = {
 763                         .f = value->side_float_binary128,
 764                 };
 765
 766                 if (reverse_bo)
 767                         side_bswap_128p(float128.arr);
 768                 printf("%Lg", (long double) float128.f);
 769                 break;
 770 #else
 771                 fprintf(stderr, "ERROR: Unsupported binary128 float type\n");
 772                 abort();
 773 #endif
 774         }
 775         default:
 776                 fprintf(stderr, "ERROR: Unknown float size\n");
 777                 abort();
 778         }
 779 }
 780
 781 static
 782 void tracer_print_type(const struct side_type *type_desc, const struct side_arg *item)
 783 {
 784         enum side_type_label type;
 785
 786         switch (type_desc->type) {
 787         case SIDE_TYPE_ENUM:
 788                 switch (item->type) {
 789                 case SIDE_TYPE_U8:
 790                 case SIDE_TYPE_U16:
 791                 case SIDE_TYPE_U32:
 792                 case SIDE_TYPE_U64:
 793                 case SIDE_TYPE_S8:
 794                 case SIDE_TYPE_S16:
 795                 case SIDE_TYPE_S32:
 796                 case SIDE_TYPE_S64:
 797                         break;
 798                 default:
 799                         fprintf(stderr, "ERROR: type mismatch between description and arguments\n");
 800                         abort();
 801                         break;
 802                 }
 803                 break;
 804
 805         case SIDE_TYPE_ENUM_BITMAP:
 806                 switch (item->type) {
 807                 case SIDE_TYPE_U8:
 808                 case SIDE_TYPE_BYTE:
 809                 case SIDE_TYPE_U16:
 810                 case SIDE_TYPE_U32:
 811                 case SIDE_TYPE_U64:
 812                 case SIDE_TYPE_ARRAY:
 813                 case SIDE_TYPE_VLA:
 814                         break;
 815                 default:
 816                         fprintf(stderr, "ERROR: type mismatch between description and arguments\n");
 817                         abort();
 818                         break;
 819                 }
 820                 break;
 821
 822         case SIDE_TYPE_DYNAMIC:
 823                 switch (item->type) {
 824                 case SIDE_TYPE_DYNAMIC_NULL:
 825                 case SIDE_TYPE_DYNAMIC_BOOL:
 826                 case SIDE_TYPE_DYNAMIC_UNSIGNED_INT:
 827                 case SIDE_TYPE_DYNAMIC_SIGNED_INT:
 828                 case SIDE_TYPE_DYNAMIC_BYTE:
 829                 case SIDE_TYPE_DYNAMIC_POINTER:
 830                 case SIDE_TYPE_DYNAMIC_FLOAT:
 831                 case SIDE_TYPE_DYNAMIC_STRING:
 832                 case SIDE_TYPE_DYNAMIC_STRUCT:
 833                 case SIDE_TYPE_DYNAMIC_STRUCT_VISITOR:
 834                 case SIDE_TYPE_DYNAMIC_VLA:
 835                 case SIDE_TYPE_DYNAMIC_VLA_VISITOR:
 836                         break;
 837                 default:
 838                         fprintf(stderr, "ERROR: Unexpected dynamic type\n");
 839                         abort();
 840                         break;
 841                 }
 842                 break;
 843
 844         default:
 845                 if (type_desc->type != item->type) {
 846                         fprintf(stderr, "ERROR: type mismatch between description and arguments\n");
 847                         abort();
 848                 }
 849                 break;
 850         }
 851
 852         if (type_desc->type == SIDE_TYPE_ENUM || type_desc->type == SIDE_TYPE_ENUM_BITMAP)
 853                 type = (enum side_type_label) type_desc->type;
 854         else
 855                 type = (enum side_type_label) item->type;
 856
 857         printf("{ ");
 858         switch (type) {
 859         case SIDE_TYPE_NULL:
 860                 tracer_print_type_header(":", type_desc->u.side_null.attr, type_desc->u.side_null.nr_attr);
 861                 printf("<NULL TYPE>");
 862                 break;
 863
 864         case SIDE_TYPE_BOOL:
 865                 tracer_print_type_bool(":", &type_desc->u.side_bool, &item->u.side_static.bool_value, 0);
 866                 break;
 867
 868         case SIDE_TYPE_U8:
 869         case SIDE_TYPE_U16:
 870         case SIDE_TYPE_U32:
 871         case SIDE_TYPE_U64:
 872         case SIDE_TYPE_S8:
 873         case SIDE_TYPE_S16:
 874         case SIDE_TYPE_S32:
 875         case SIDE_TYPE_S64:
 876                 tracer_print_type_integer(":", &type_desc->u.side_integer, &item->u.side_static.integer_value, 0,
 877                                 TRACER_DISPLAY_BASE_10);
 878                 break;
 879
 880         case SIDE_TYPE_POINTER:
 881                 tracer_print_type_integer(":", &type_desc->u.side_integer, &item->u.side_static.integer_value, 0,
 882                                 TRACER_DISPLAY_BASE_16);
 883                 break;
 884
 885         case SIDE_TYPE_BYTE:
 886                 tracer_print_type_header(":", type_desc->u.side_byte.attr, type_desc->u.side_byte.nr_attr);
 887                 printf("0x%" PRIx8, item->u.side_static.byte_value);
 888                 break;
 889
 890         case SIDE_TYPE_ENUM:
 891                 print_enum(type_desc, item);
 892                 break;
 893
 894         case SIDE_TYPE_ENUM_BITMAP:
 895                 print_enum_bitmap(type_desc, item);
 896                 break;
 897
 898         case SIDE_TYPE_FLOAT_BINARY16:
 899         case SIDE_TYPE_FLOAT_BINARY32:
 900         case SIDE_TYPE_FLOAT_BINARY64:
 901         case SIDE_TYPE_FLOAT_BINARY128:
 902                 tracer_print_type_float(":", &type_desc->u.side_float, &item->u.side_static.float_value);
 903                 break;
 904
 905         case SIDE_TYPE_STRING:
 906                 tracer_print_type_header(":", type_desc->u.side_string.attr, type_desc->u.side_string.nr_attr);
 907                 printf("\"%s\"", (const char *)(uintptr_t) item->u.side_static.string_value);
 908                 break;
 909         case SIDE_TYPE_STRUCT:
 910                 tracer_print_struct(type_desc, item->u.side_static.side_struct);
 911                 break;
 912         case SIDE_TYPE_GATHER_STRUCT:
 913                 (void) tracer_print_gather_struct(&type_desc->u.side_gather, item->u.side_static.side_struct_gather_ptr);
 914                 break;
 915         case SIDE_TYPE_GATHER_ARRAY:
 916                 (void) tracer_print_gather_array(&type_desc->u.side_gather, item->u.side_static.side_array_gather_ptr);
 917                 break;
 918         case SIDE_TYPE_GATHER_VLA:
 919                 (void) tracer_print_gather_vla(&type_desc->u.side_gather, item->u.side_static.side_vla_gather.ptr,
 920                                 item->u.side_static.side_vla_gather.length_ptr);
 921                 break;
 922         case SIDE_TYPE_GATHER_BOOL:
 923                 (void) tracer_print_gather_bool_type(&type_desc->u.side_gather, item->u.side_static.side_bool_gather_ptr);
 924                 break;
 925         case SIDE_TYPE_GATHER_BYTE:
 926                 (void) tracer_print_gather_byte_type(&type_desc->u.side_gather, item->u.side_static.side_byte_gather_ptr);
 927                 break;
 928         case SIDE_TYPE_GATHER_POINTER:
 929                 (void) tracer_print_gather_integer_type(&type_desc->u.side_gather, item->u.side_static.side_integer_gather_ptr,
 930                                         TRACER_DISPLAY_BASE_16);
 931                 break;
 932         case SIDE_TYPE_GATHER_UNSIGNED_INT:
 933         case SIDE_TYPE_GATHER_SIGNED_INT:
 934                 (void) tracer_print_gather_integer_type(&type_desc->u.side_gather, item->u.side_static.side_integer_gather_ptr,
 935                                         TRACER_DISPLAY_BASE_10);
 936                 break;
 937         case SIDE_TYPE_GATHER_FLOAT:
 938                 (void) tracer_print_gather_float_type(&type_desc->u.side_gather, item->u.side_static.side_float_gather_ptr);
 939                 break;
 940         case SIDE_TYPE_ARRAY:
 941                 tracer_print_array(type_desc, item->u.side_static.side_array);
 942                 break;
 943         case SIDE_TYPE_VLA:
 944                 tracer_print_vla(type_desc, item->u.side_static.side_vla);
 945                 break;
 946         case SIDE_TYPE_VLA_VISITOR:
 947                 tracer_print_vla_visitor(type_desc, item->u.side_static.side_vla_app_visitor_ctx);
 948                 break;
 949
 950         /* Dynamic types */
 951         case SIDE_TYPE_DYNAMIC_NULL:
 952         case SIDE_TYPE_DYNAMIC_BOOL:
 953         case SIDE_TYPE_DYNAMIC_UNSIGNED_INT:
 954         case SIDE_TYPE_DYNAMIC_SIGNED_INT:
 955         case SIDE_TYPE_DYNAMIC_BYTE:
 956         case SIDE_TYPE_DYNAMIC_POINTER:
 957         case SIDE_TYPE_DYNAMIC_FLOAT:
 958         case SIDE_TYPE_DYNAMIC_STRING:
 959         case SIDE_TYPE_DYNAMIC_STRUCT:
 960         case SIDE_TYPE_DYNAMIC_STRUCT_VISITOR:
 961         case SIDE_TYPE_DYNAMIC_VLA:
 962         case SIDE_TYPE_DYNAMIC_VLA_VISITOR:
 963                 tracer_print_dynamic(item);
 964                 break;
 965         default:
 966                 fprintf(stderr, "<UNKNOWN TYPE>\n");
 967                 abort();
 968         }
 969         printf(" }");
 970 }
 971
 972 static
 973 void tracer_print_field(const struct side_event_field *item_desc, const struct side_arg *item)
 974 {
 975         printf("%s: ", item_desc->field_name);
 976         tracer_print_type(&item_desc->side_type, item);
 977 }
 978
 979 static
 980 void tracer_print_struct(const struct side_type *type_desc, const struct side_arg_vec *side_arg_vec)
 981 {
 982         const struct side_arg *sav = side_arg_vec->sav;
 983         uint32_t i, side_sav_len = side_arg_vec->len;
 984
 985         if (type_desc->u.side_struct->nr_fields != side_sav_len) {
 986                 fprintf(stderr, "ERROR: number of fields mismatch between description and arguments of structure\n");
 987                 abort();
 988         }
 989         print_attributes("attr", ":", type_desc->u.side_struct->attr, type_desc->u.side_struct->nr_attr);
 990         printf("%s", type_desc->u.side_struct->nr_attr ? ", " : "");
 991         printf("fields: { ");
 992         for (i = 0; i < side_sav_len; i++) {
 993                 printf("%s", i ? ", " : "");
 994                 tracer_print_field(&type_desc->u.side_struct->fields[i], &sav[i]);
 995         }
 996         printf(" }");
 997 }
 998
 999 static
1000 void tracer_print_array(const struct side_type *type_desc, const struct side_arg_vec *side_arg_vec)
1001 {
1002         const struct side_arg *sav = side_arg_vec->sav;
1003         uint32_t i, side_sav_len = side_arg_vec->len;
1004
1005         if (type_desc->u.side_array.length != side_sav_len) {
1006                 fprintf(stderr, "ERROR: length mismatch between description and arguments of array\n");
1007                 abort();
1008         }
1009         print_attributes("attr", ":", type_desc->u.side_array.attr, type_desc->u.side_array.nr_attr);
1010         printf("%s", type_desc->u.side_array.nr_attr ? ", " : "");
1011         printf("elements: ");
1012         printf("[ ");
1013         for (i = 0; i < side_sav_len; i++) {
1014                 printf("%s", i ? ", " : "");
1015                 tracer_print_type(type_desc->u.side_array.elem_type, &sav[i]);
1016         }
1017         printf(" ]");
1018 }
1019
1020 static
1021 void tracer_print_vla(const struct side_type *type_desc, const struct side_arg_vec *side_arg_vec)
1022 {
1023         const struct side_arg *sav = side_arg_vec->sav;
1024         uint32_t i, side_sav_len = side_arg_vec->len;
1025
1026         print_attributes("attr", ":", type_desc->u.side_vla.attr, type_desc->u.side_vla.nr_attr);
1027         printf("%s", type_desc->u.side_vla.nr_attr ? ", " : "");
1028         printf("elements: ");
1029         printf("[ ");
1030         for (i = 0; i < side_sav_len; i++) {
1031                 printf("%s", i ? ", " : "");
1032                 tracer_print_type(type_desc->u.side_vla.elem_type, &sav[i]);
1033         }
1034         printf(" ]");
1035 }
1036
1037 static
1038 const char *tracer_gather_access(enum side_type_gather_access_mode access_mode, const char *ptr)
1039 {
1040         switch (access_mode) {
1041         case SIDE_TYPE_GATHER_ACCESS_DIRECT:
1042                 return ptr;
1043         case SIDE_TYPE_GATHER_ACCESS_POINTER:
1044                 /* Dereference pointer */
1045                 memcpy(&ptr, ptr, sizeof(ptr));
1046                 return ptr;
1047         default:
1048                 abort();
1049         }
1050 }
1051
1052 static
1053 uint32_t tracer_gather_size(enum side_type_gather_access_mode access_mode, uint32_t len)
1054 {
1055         switch (access_mode) {
1056         case SIDE_TYPE_GATHER_ACCESS_DIRECT:
1057                 return len;
1058         case SIDE_TYPE_GATHER_ACCESS_POINTER:
1059                 return sizeof(void *);
1060         default:
1061                 abort();
1062         }
1063 }
1064
1065 static
1066 uint64_t tracer_load_gather_integer_type(const struct side_type_gather *type_gather, const void *_ptr)
1067 {
1068         enum side_type_gather_access_mode access_mode = type_gather->u.side_integer.access_mode;
1069         uint32_t integer_size_bytes = type_gather->u.side_integer.type.integer_size;
1070         const char *ptr = (const char *) _ptr;
1071         union side_integer_value value;
1072
1073         ptr = tracer_gather_access(access_mode, ptr + type_gather->u.side_integer.offset);
1074         memcpy(&value, ptr, integer_size_bytes);
1075         switch (type_gather->u.side_integer.type.integer_size) {
1076         case 1:
1077                 return (uint64_t) value.side_u8;
1078         case 2:
1079                 return (uint64_t) value.side_u16;
1080         case 4:
1081                 return (uint64_t) value.side_u32;
1082         case 8:
1083                 return (uint64_t) value.side_u64;
1084         default:
1085                 abort();
1086         }
1087 }
1088
1089 static
1090 uint32_t tracer_print_gather_bool_type(const struct side_type_gather *type_gather, const void *_ptr)
1091 {
1092         enum side_type_gather_access_mode access_mode = type_gather->u.side_bool.access_mode;
1093         uint32_t bool_size_bytes = type_gather->u.side_bool.type.bool_size;
1094         const char *ptr = (const char *) _ptr;
1095         union side_bool_value value;
1096
1097         switch (bool_size_bytes) {
1098         case 1:
1099         case 2:
1100         case 4:
1101         case 8:
1102                 break;
1103         default:
1104                 abort();
1105         }
1106         ptr = tracer_gather_access(access_mode, ptr + type_gather->u.side_bool.offset);
1107         memcpy(&value, ptr, bool_size_bytes);
1108         tracer_print_type_bool(":", &type_gather->u.side_bool.type, &value,
1109                         type_gather->u.side_bool.offset_bits);
1110         return tracer_gather_size(access_mode, bool_size_bytes);
1111 }
1112
1113 static
1114 uint32_t tracer_print_gather_byte_type(const struct side_type_gather *type_gather, const void *_ptr)
1115 {
1116         enum side_type_gather_access_mode access_mode = type_gather->u.side_byte.access_mode;
1117         const char *ptr = (const char *) _ptr;
1118         uint8_t value;
1119
1120         ptr = tracer_gather_access(access_mode, ptr + type_gather->u.side_byte.offset);
1121         memcpy(&value, ptr, 1);
1122         tracer_print_type_header(":", type_gather->u.side_byte.type.attr,
1123                         type_gather->u.side_byte.type.nr_attr);
1124         printf("0x%" PRIx8, value);
1125         return tracer_gather_size(access_mode, 1);
1126 }
1127
1128 static
1129 uint32_t tracer_print_gather_integer_type(const struct side_type_gather *type_gather, const void *_ptr,
1130                 enum tracer_display_base default_base)
1131 {
1132         enum side_type_gather_access_mode access_mode = type_gather->u.side_integer.access_mode;
1133         uint32_t integer_size_bytes = type_gather->u.side_integer.type.integer_size;
1134         const char *ptr = (const char *) _ptr;
1135         union side_integer_value value;
1136
1137         switch (integer_size_bytes) {
1138         case 1:
1139         case 2:
1140         case 4:
1141         case 8:
1142                 break;
1143         default:
1144                 abort();
1145         }
1146         ptr = tracer_gather_access(access_mode, ptr + type_gather->u.side_integer.offset);
1147         memcpy(&value, ptr, integer_size_bytes);
1148         tracer_print_type_integer(":", &type_gather->u.side_integer.type, &value,
1149                         type_gather->u.side_integer.offset_bits, default_base);
1150         return tracer_gather_size(access_mode, integer_size_bytes);
1151 }
1152
1153 static
1154 uint32_t tracer_print_gather_float_type(const struct side_type_gather *type_gather, const void *_ptr)
1155 {
1156         enum side_type_gather_access_mode access_mode = type_gather->u.side_float.access_mode;
1157         uint32_t float_size_bytes = type_gather->u.side_float.type.float_size;
1158         const char *ptr = (const char *) _ptr;
1159         union side_float_value value;
1160
1161         switch (float_size_bytes) {
1162         case 2:
1163         case 4:
1164         case 8:
1165         case 16:
1166                 break;
1167         default:
1168                 abort();
1169         }
1170         ptr = tracer_gather_access(access_mode, ptr + type_gather->u.side_float.offset);
1171         memcpy(&value, ptr, float_size_bytes);
1172         tracer_print_type_float(":", &type_gather->u.side_float.type, &value);
1173         return tracer_gather_size(access_mode, float_size_bytes);
1174 }
1175
1176 static
1177 uint32_t tracer_print_gather_type(const struct side_type *type_desc, const void *ptr)
1178 {
1179         uint32_t len;
1180
1181         printf("{ ");
1182         switch (type_desc->type) {
1183         case SIDE_TYPE_GATHER_BOOL:
1184                 len = tracer_print_gather_bool_type(&type_desc->u.side_gather, ptr);
1185                 break;
1186         case SIDE_TYPE_GATHER_BYTE:
1187                 len = tracer_print_gather_byte_type(&type_desc->u.side_gather, ptr);
1188                 break;
1189         case SIDE_TYPE_GATHER_POINTER:
1190                 len = tracer_print_gather_integer_type(&type_desc->u.side_gather, ptr,
1191                                 TRACER_DISPLAY_BASE_16);
1192                 break;
1193         case SIDE_TYPE_GATHER_UNSIGNED_INT:
1194         case SIDE_TYPE_GATHER_SIGNED_INT:
1195                 len = tracer_print_gather_integer_type(&type_desc->u.side_gather, ptr,
1196                                 TRACER_DISPLAY_BASE_10);
1197                 break;
1198         case SIDE_TYPE_GATHER_FLOAT:
1199                 len = tracer_print_gather_float_type(&type_desc->u.side_gather, ptr);
1200                 break;
1201         case SIDE_TYPE_GATHER_STRUCT:
1202                 len = tracer_print_gather_struct(&type_desc->u.side_gather, ptr);
1203                 break;
1204         case SIDE_TYPE_GATHER_ARRAY:
1205                 len = tracer_print_gather_array(&type_desc->u.side_gather, ptr);
1206                 break;
1207         case SIDE_TYPE_GATHER_VLA:
1208                 len = tracer_print_gather_vla(&type_desc->u.side_gather, ptr, ptr);
1209                 break;
1210         default:
1211                 fprintf(stderr, "<UNKNOWN GATHER TYPE>");
1212                 abort();
1213         }
1214         printf(" }");
1215         return len;
1216 }
1217
1218 static
1219 void tracer_print_gather_field(const struct side_event_field *field, const void *ptr)
1220 {
1221         printf("%s: ", field->field_name);
1222         (void) tracer_print_gather_type(&field->side_type, ptr);
1223 }
1224
1225 static
1226 uint32_t tracer_print_gather_struct(const struct side_type_gather *type_gather, const void *_ptr)
1227 {
1228         enum side_type_gather_access_mode access_mode = type_gather->u.side_struct.access_mode;
1229         const char *ptr = (const char *) _ptr;
1230         uint32_t i;
1231
1232         ptr = tracer_gather_access(access_mode, ptr + type_gather->u.side_struct.offset);
1233         print_attributes("attr", ":", type_gather->u.side_struct.type->attr, type_gather->u.side_struct.type->nr_attr);
1234         printf("%s", type_gather->u.side_struct.type->nr_attr ? ", " : "");
1235         printf("fields: { ");
1236         for (i = 0; i < type_gather->u.side_struct.type->nr_fields; i++) {
1237                 printf("%s", i ? ", " : "");
1238                 tracer_print_gather_field(&type_gather->u.side_struct.type->fields[i], ptr);
1239         }
1240         printf(" }");
1241         return tracer_gather_size(access_mode, type_gather->u.side_struct.size);
1242 }
1243
1244 static
1245 uint32_t tracer_print_gather_array(const struct side_type_gather *type_gather, const void *_ptr)
1246 {
1247         enum side_type_gather_access_mode access_mode = type_gather->u.side_array.access_mode;
1248         const char *ptr = (const char *) _ptr, *orig_ptr;
1249         uint32_t i;
1250
1251         ptr = tracer_gather_access(access_mode, ptr + type_gather->u.side_array.offset);
1252         orig_ptr = ptr;
1253         print_attributes("attr", ":", type_gather->u.side_array.type.attr, type_gather->u.side_array.type.nr_attr);
1254         printf("%s", type_gather->u.side_array.type.nr_attr ? ", " : "");
1255         printf("elements: ");
1256         printf("[ ");
1257         for (i = 0; i < type_gather->u.side_array.type.length; i++) {
1258                 switch (type_gather->u.side_array.type.elem_type->type) {
1259                 case SIDE_TYPE_GATHER_VLA:
1260                         fprintf(stderr, "<gather VLA only supported within gather structures>\n");
1261                         abort();
1262                 default:
1263                         break;
1264                 }
1265                 printf("%s", i ? ", " : "");
1266                 ptr += tracer_print_gather_type(type_gather->u.side_array.type.elem_type, ptr);
1267         }
1268         printf(" ]");
1269         return tracer_gather_size(access_mode, ptr - orig_ptr);
1270 }
1271
1272 static
1273 uint32_t tracer_print_gather_vla(const struct side_type_gather *type_gather, const void *_ptr,
1274                 const void *_length_ptr)
1275 {
1276         enum side_type_gather_access_mode access_mode = type_gather->u.side_vla.access_mode;
1277         const char *ptr = (const char *) _ptr, *orig_ptr;
1278         const char *length_ptr = (const char *) _length_ptr;
1279         uint32_t i, length;
1280
1281         /* Access length */
1282         switch (type_gather->u.side_vla.length_type->type) {
1283         case SIDE_TYPE_GATHER_UNSIGNED_INT:
1284         case SIDE_TYPE_GATHER_SIGNED_INT:
1285                 break;
1286         default:
1287                 fprintf(stderr, "<gather VLA expects integer gather length type>\n");
1288                 abort();
1289         }
1290         length = (uint32_t) tracer_load_gather_integer_type(&type_gather->u.side_vla.length_type->u.side_gather, length_ptr);
1291         ptr = tracer_gather_access(access_mode, ptr + type_gather->u.side_vla.offset);
1292         orig_ptr = ptr;
1293         print_attributes("attr", ":", type_gather->u.side_vla.type.attr, type_gather->u.side_vla.type.nr_attr);
1294         printf("%s", type_gather->u.side_vla.type.nr_attr ? ", " : "");
1295         printf("elements: ");
1296         printf("[ ");
1297         for (i = 0; i < length; i++) {
1298                 switch (type_gather->u.side_vla.type.elem_type->type) {
1299                 case SIDE_TYPE_GATHER_VLA:
1300                         fprintf(stderr, "<gather VLA only supported within gather structures>\n");
1301                         abort();
1302                 default:
1303                         break;
1304                 }
1305                 printf("%s", i ? ", " : "");
1306                 ptr += tracer_print_gather_type(type_gather->u.side_vla.type.elem_type, ptr);
1307         }
1308         printf(" ]");
1309         return tracer_gather_size(access_mode, ptr - orig_ptr);
1310 }
1311
1312 struct tracer_visitor_priv {
1313         const struct side_type *elem_type;
1314         int i;
1315 };
1316
1317 static
1318 enum side_visitor_status tracer_write_elem_cb(const struct side_tracer_visitor_ctx *tracer_ctx,
1319                         const struct side_arg *elem)
1320 {
1321         struct tracer_visitor_priv *tracer_priv = (struct tracer_visitor_priv *) tracer_ctx->priv;
1322
1323         printf("%s", tracer_priv->i++ ? ", " : "");
1324         tracer_print_type(tracer_priv->elem_type, elem);
1325         return SIDE_VISITOR_STATUS_OK;
1326 }
1327
1328 static
1329 void tracer_print_vla_visitor(const struct side_type *type_desc, void *app_ctx)
1330 {
1331         enum side_visitor_status status;
1332         struct tracer_visitor_priv tracer_priv = {
1333                 .elem_type = type_desc->u.side_vla_visitor.elem_type,
1334                 .i = 0,
1335         };
1336         const struct side_tracer_visitor_ctx tracer_ctx = {
1337                 .write_elem = tracer_write_elem_cb,
1338                 .priv = &tracer_priv,
1339         };
1340
1341         print_attributes("attr", ":", type_desc->u.side_vla_visitor.attr, type_desc->u.side_vla_visitor.nr_attr);
1342         printf("%s", type_desc->u.side_vla_visitor.nr_attr ? ", " : "");
1343         printf("elements: ");
1344         printf("[ ");
1345         status = type_desc->u.side_vla_visitor.visitor(&tracer_ctx, app_ctx);
1346         switch (status) {
1347         case SIDE_VISITOR_STATUS_OK:
1348                 break;
1349         case SIDE_VISITOR_STATUS_ERROR:
1350                 fprintf(stderr, "ERROR: Visitor error\n");
1351                 abort();
1352         }
1353         printf(" ]");
1354 }
1355
1356 static
1357 void tracer_print_dynamic_struct(const struct side_arg_dynamic_struct *dynamic_struct)
1358 {
1359         const struct side_arg_dynamic_field *fields = dynamic_struct->fields;
1360         uint32_t i, len = dynamic_struct->len;
1361
1362         print_attributes("attr", "::", dynamic_struct->attr, dynamic_struct->nr_attr);
1363         printf("%s", dynamic_struct->nr_attr ? ", " : "");
1364         printf("fields:: ");
1365         printf("[ ");
1366         for (i = 0; i < len; i++) {
1367                 printf("%s", i ? ", " : "");
1368                 printf("%s:: ", fields[i].field_name);
1369                 tracer_print_dynamic(&fields[i].elem);
1370         }
1371         printf(" ]");
1372 }
1373
1374 struct tracer_dynamic_struct_visitor_priv {
1375         int i;
1376 };
1377
1378 static
1379 enum side_visitor_status tracer_dynamic_struct_write_elem_cb(
1380                         const struct side_tracer_dynamic_struct_visitor_ctx *tracer_ctx,
1381                         const struct side_arg_dynamic_field *dynamic_field)
1382 {
1383         struct tracer_dynamic_struct_visitor_priv *tracer_priv =
1384                 (struct tracer_dynamic_struct_visitor_priv *) tracer_ctx->priv;
1385
1386         printf("%s", tracer_priv->i++ ? ", " : "");
1387         printf("%s:: ", dynamic_field->field_name);
1388         tracer_print_dynamic(&dynamic_field->elem);
1389         return SIDE_VISITOR_STATUS_OK;
1390 }
1391
1392 static
1393 void tracer_print_dynamic_struct_visitor(const struct side_arg *item)
1394 {
1395         enum side_visitor_status status;
1396         struct tracer_dynamic_struct_visitor_priv tracer_priv = {
1397                 .i = 0,
1398         };
1399         const struct side_tracer_dynamic_struct_visitor_ctx tracer_ctx = {
1400                 .write_field = tracer_dynamic_struct_write_elem_cb,
1401                 .priv = &tracer_priv,
1402         };
1403         void *app_ctx = item->u.side_dynamic.side_dynamic_struct_visitor.app_ctx;
1404
1405         print_attributes("attr", "::", item->u.side_dynamic.side_dynamic_struct_visitor.attr, item->u.side_dynamic.side_dynamic_struct_visitor.nr_attr);
1406         printf("%s", item->u.side_dynamic.side_dynamic_struct_visitor.nr_attr ? ", " : "");
1407         printf("fields:: ");
1408         printf("[ ");
1409         status = item->u.side_dynamic.side_dynamic_struct_visitor.visitor(&tracer_ctx, app_ctx);
1410         switch (status) {
1411         case SIDE_VISITOR_STATUS_OK:
1412                 break;
1413         case SIDE_VISITOR_STATUS_ERROR:
1414                 fprintf(stderr, "ERROR: Visitor error\n");
1415                 abort();
1416         }
1417         printf(" ]");
1418 }
1419
1420 static
1421 void tracer_print_dynamic_vla(const struct side_arg_dynamic_vla *vla)
1422 {
1423         const struct side_arg *sav = vla->sav;
1424         uint32_t i, side_sav_len = vla->len;
1425
1426         print_attributes("attr", "::", vla->attr, vla->nr_attr);
1427         printf("%s", vla->nr_attr ? ", " : "");
1428         printf("elements:: ");
1429         printf("[ ");
1430         for (i = 0; i < side_sav_len; i++) {
1431                 printf("%s", i ? ", " : "");
1432                 tracer_print_dynamic(&sav[i]);
1433         }
1434         printf(" ]");
1435 }
1436
1437 struct tracer_dynamic_vla_visitor_priv {
1438         int i;
1439 };
1440
1441 static
1442 enum side_visitor_status tracer_dynamic_vla_write_elem_cb(
1443                         const struct side_tracer_visitor_ctx *tracer_ctx,
1444                         const struct side_arg *elem)
1445 {
1446         struct tracer_dynamic_vla_visitor_priv *tracer_priv =
1447                 (struct tracer_dynamic_vla_visitor_priv *) tracer_ctx->priv;
1448
1449         printf("%s", tracer_priv->i++ ? ", " : "");
1450         tracer_print_dynamic(elem);
1451         return SIDE_VISITOR_STATUS_OK;
1452 }
1453
1454 static
1455 void tracer_print_dynamic_vla_visitor(const struct side_arg *item)
1456 {
1457         enum side_visitor_status status;
1458         struct tracer_dynamic_vla_visitor_priv tracer_priv = {
1459                 .i = 0,
1460         };
1461         const struct side_tracer_visitor_ctx tracer_ctx = {
1462                 .write_elem = tracer_dynamic_vla_write_elem_cb,
1463                 .priv = &tracer_priv,
1464         };
1465         void *app_ctx = item->u.side_dynamic.side_dynamic_vla_visitor.app_ctx;
1466
1467         print_attributes("attr", "::", item->u.side_dynamic.side_dynamic_vla_visitor.attr, item->u.side_dynamic.side_dynamic_vla_visitor.nr_attr);
1468         printf("%s", item->u.side_dynamic.side_dynamic_vla_visitor.nr_attr ? ", " : "");
1469         printf("elements:: ");
1470         printf("[ ");
1471         status = item->u.side_dynamic.side_dynamic_vla_visitor.visitor(&tracer_ctx, app_ctx);
1472         switch (status) {
1473         case SIDE_VISITOR_STATUS_OK:
1474                 break;
1475         case SIDE_VISITOR_STATUS_ERROR:
1476                 fprintf(stderr, "ERROR: Visitor error\n");
1477                 abort();
1478         }
1479         printf(" ]");
1480 }
1481
1482 static
1483 void tracer_print_dynamic(const struct side_arg *item)
1484 {
1485         printf("{ ");
1486         switch (item->type) {
1487         case SIDE_TYPE_DYNAMIC_NULL:
1488                 tracer_print_type_header("::", item->u.side_dynamic.side_null.attr, item->u.side_dynamic.side_null.nr_attr);
1489                 printf("<NULL TYPE>");
1490                 break;
1491
1492         case SIDE_TYPE_DYNAMIC_BOOL:
1493                 tracer_print_type_bool("::", &item->u.side_dynamic.side_bool.type, &item->u.side_dynamic.side_bool.value, 0);
1494                 break;
1495
1496         case SIDE_TYPE_DYNAMIC_UNSIGNED_INT:
1497         case SIDE_TYPE_DYNAMIC_SIGNED_INT:
1498                 tracer_print_type_integer("::", &item->u.side_dynamic.side_integer.type, &item->u.side_dynamic.side_integer.value, 0,
1499                                 TRACER_DISPLAY_BASE_10);
1500                 break;
1501         case SIDE_TYPE_DYNAMIC_BYTE:
1502                 tracer_print_type_header("::", item->u.side_dynamic.side_byte.type.attr, item->u.side_dynamic.side_byte.type.nr_attr);
1503                 printf("0x%" PRIx8, item->u.side_dynamic.side_byte.value);
1504                 break;
1505
1506         case SIDE_TYPE_DYNAMIC_POINTER:
1507                 tracer_print_type_integer("::", &item->u.side_dynamic.side_integer.type, &item->u.side_dynamic.side_integer.value, 0,
1508                                 TRACER_DISPLAY_BASE_16);
1509                 break;
1510
1511         case SIDE_TYPE_DYNAMIC_FLOAT:
1512                 tracer_print_type_float("::", &item->u.side_dynamic.side_float.type,
1513                                         &item->u.side_dynamic.side_float.value);
1514                 break;
1515
1516         case SIDE_TYPE_DYNAMIC_STRING:
1517                 tracer_print_type_header("::", item->u.side_dynamic.side_string.type.attr, item->u.side_dynamic.side_string.type.nr_attr);
1518                 printf("\"%s\"", (const char *)(uintptr_t) item->u.side_dynamic.side_string.value);
1519                 break;
1520         case SIDE_TYPE_DYNAMIC_STRUCT:
1521                 tracer_print_dynamic_struct(item->u.side_dynamic.side_dynamic_struct);
1522                 break;
1523         case SIDE_TYPE_DYNAMIC_STRUCT_VISITOR:
1524                 tracer_print_dynamic_struct_visitor(item);
1525                 break;
1526         case SIDE_TYPE_DYNAMIC_VLA:
1527                 tracer_print_dynamic_vla(item->u.side_dynamic.side_dynamic_vla);
1528                 break;
1529         case SIDE_TYPE_DYNAMIC_VLA_VISITOR:
1530                 tracer_print_dynamic_vla_visitor(item);
1531                 break;
1532         default:
1533                 fprintf(stderr, "<UNKNOWN TYPE>\n");
1534                 abort();
1535         }
1536         printf(" }");
1537 }
1538
1539 static
1540 void tracer_print_static_fields(const struct side_event_description *desc,
1541                 const struct side_arg_vec *side_arg_vec,
1542                 uint32_t *nr_items)
1543 {
1544         const struct side_arg *sav = side_arg_vec->sav;
1545         uint32_t i, side_sav_len = side_arg_vec->len;
1546
1547         printf("provider: %s, event: %s", desc->provider_name, desc->event_name);
1548         if (desc->nr_fields != side_sav_len) {
1549                 fprintf(stderr, "ERROR: number of fields mismatch between description and arguments\n");
1550                 abort();
1551         }
1552         print_attributes(", attr", ":", desc->attr, desc->nr_attr);
1553         printf("%s", side_sav_len ? ", fields: [ " : "");
1554         for (i = 0; i < side_sav_len; i++) {
1555                 printf("%s", i ? ", " : "");
1556                 tracer_print_field(&desc->fields[i], &sav[i]);
1557         }
1558         if (nr_items)
1559                 *nr_items = i;
1560         if (side_sav_len)
1561                 printf(" ]");
1562 }
1563
1564 void tracer_call(const struct side_event_description *desc,
1565                 const struct side_arg_vec *side_arg_vec,
1566                 void *priv __attribute__((unused)))
1567 {
1568         uint32_t nr_fields = 0;
1569
1570         tracer_print_static_fields(desc, side_arg_vec, &nr_fields);
1571         printf("\n");
1572 }
1573
1574 void tracer_call_variadic(const struct side_event_description *desc,
1575                 const struct side_arg_vec *side_arg_vec,
1576                 const struct side_arg_dynamic_struct *var_struct,
1577                 void *priv __attribute__((unused)))
1578 {
1579         uint32_t nr_fields = 0, i, var_struct_len = var_struct->len;
1580
1581         tracer_print_static_fields(desc, side_arg_vec, &nr_fields);
1582
1583         if (side_unlikely(!(desc->flags & SIDE_EVENT_FLAG_VARIADIC))) {
1584                 fprintf(stderr, "ERROR: unexpected non-variadic event description\n");
1585                 abort();
1586         }
1587         print_attributes(", attr ", "::", var_struct->attr, var_struct->nr_attr);
1588         printf("%s", var_struct_len ? ", fields:: [ " : "");
1589         for (i = 0; i < var_struct_len; i++, nr_fields++) {
1590                 printf("%s", i ? ", " : "");
1591                 printf("%s:: ", var_struct->fields[i].field_name);
1592                 tracer_print_dynamic(&var_struct->fields[i].elem);
1593         }
1594         if (i)
1595                 printf(" ]");
1596         printf("\n");
1597 }
1598
1599 void tracer_event_notification(enum side_tracer_notification notif,
1600                 struct side_event_description **events, uint32_t nr_events, void *priv)
1601 {
1602         uint32_t i;
1603         int ret;
1604
1605         printf("----------------------------------------------------------\n");
1606         printf("Tracer notified of events %s\n",
1607                 notif == SIDE_TRACER_NOTIFICATION_INSERT_EVENTS ? "inserted" : "removed");
1608         for (i = 0; i < nr_events; i++) {
1609                 struct side_event_description *event = events[i];
1610
1611                 /* Skip NULL pointers */
1612                 if (!event)
1613                         continue;
1614                 printf("provider: %s, event: %s\n",
1615                         event->provider_name, event->event_name);
1616                 if  (notif == SIDE_TRACER_NOTIFICATION_INSERT_EVENTS) {
1617                         if (event->flags & SIDE_EVENT_FLAG_VARIADIC) {
1618                                 ret = side_tracer_callback_variadic_register(event, tracer_call_variadic, NULL);
1619                                 if (ret)
1620                                         abort();
1621                         } else {
1622                                 ret = side_tracer_callback_register(event, tracer_call, NULL);
1623                                 if (ret)
1624                                         abort();
1625                         }
1626                 } else {
1627                         if (event->flags & SIDE_EVENT_FLAG_VARIADIC) {
1628                                 ret = side_tracer_callback_variadic_unregister(event, tracer_call_variadic, NULL);
1629                                 if (ret)
1630                                         abort();
1631                         } else {
1632                                 ret = side_tracer_callback_unregister(event, tracer_call, NULL);
1633                                 if (ret)
1634                                         abort();
1635                         }
1636                 }
1637         }
1638         printf("----------------------------------------------------------\n");
1639 }
1640
1641 static __attribute__((constructor))
1642 void tracer_init(void);
1643 static
1644 void tracer_init(void)
1645 {
1646         tracer_handle = side_tracer_event_notification_register(tracer_event_notification, NULL);
1647         if (!tracer_handle)
1648                 abort();
1649 }
1650
1651 static __attribute__((destructor))
1652 void tracer_exit(void);
1653 static
1654 void tracer_exit(void)
1655 {
1656         side_tracer_event_notification_unregister(tracer_handle);
1657 }