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         switch (type_integer->integer_size) {
 594         case 1:
 595                 if (type_integer->signedness)
 596                         v.v_signed = value->side_s8;
 597                 else
 598                         v.v_unsigned = value->side_u8;
 599                 break;
 600         case 2:
 601                 if (type_integer->signedness) {
 602                         int16_t side_s16;
 603
 604                         side_s16 = value->side_s16;
 605                         if (reverse_bo)
 606                                 side_s16 = side_bswap_16(side_s16);
 607                         v.v_signed = side_s16;
 608                 } else {
 609                         uint16_t side_u16;
 610
 611                         side_u16 = value->side_u16;
 612                         if (reverse_bo)
 613                                 side_u16 = side_bswap_16(side_u16);
 614                         v.v_unsigned = side_u16;
 615                 }
 616                 break;
 617         case 4:
 618                 if (type_integer->signedness) {
 619                         int32_t side_s32;
 620
 621                         side_s32 = value->side_s32;
 622                         if (reverse_bo)
 623                                 side_s32 = side_bswap_32(side_s32);
 624                         v.v_signed = side_s32;
 625                 } else {
 626                         uint32_t side_u32;
 627
 628                         side_u32 = value->side_u32;
 629                         if (reverse_bo)
 630                                 side_u32 = side_bswap_32(side_u32);
 631                         v.v_unsigned = side_u32;
 632                 }
 633                 break;
 634         case 8:
 635                 if (type_integer->signedness) {
 636                         int64_t side_s64;
 637
 638                         side_s64 = value->side_s64;
 639                         if (reverse_bo)
 640                                 side_s64 = side_bswap_64(side_s64);
 641                         v.v_signed = side_s64;
 642                 } else {
 643                         uint64_t side_u64;
 644
 645                         side_u64 = value->side_u64;
 646                         if (reverse_bo)
 647                                 side_u64 = side_bswap_64(side_u64);
 648                         v.v_unsigned = side_u64;
 649                 }
 650                 break;
 651         default:
 652                 abort();
 653         }
 654         v.v_unsigned >>= offset_bits;
 655         if (len_bits < 64)
 656                 v.v_unsigned &= (1ULL << len_bits) - 1;
 657         tracer_print_type_header(separator, type_integer->attr, type_integer->nr_attr);
 658         base = get_attr_display_base(type_integer->attr,
 659                         type_integer->nr_attr,
 660                         default_base);
 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         tracer_print_type_header(separator, type_float->attr, type_float->nr_attr);
 696         reverse_bo = type_float->byte_order != SIDE_TYPE_FLOAT_WORD_ORDER_HOST;
 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                 printf("%g", (double) float16.f);
 711                 break;
 712 #else
 713                 fprintf(stderr, "ERROR: Unsupported binary16 float type\n");
 714                 abort();
 715 #endif
 716         }
 717         case 4:
 718         {
 719 #if __HAVE_FLOAT32
 720                 union {
 721                         _Float32 f;
 722                         uint32_t u;
 723                 } float32 = {
 724                         .f = value->side_float_binary32,
 725                 };
 726
 727                 if (reverse_bo)
 728                         float32.u = side_bswap_32(float32.u);
 729                 printf("%g", (double) float32.f);
 730                 break;
 731 #else
 732                 fprintf(stderr, "ERROR: Unsupported binary32 float type\n");
 733                 abort();
 734 #endif
 735         }
 736         case 8:
 737         {
 738 #if __HAVE_FLOAT64
 739                 union {
 740                         _Float64 f;
 741                         uint64_t u;
 742                 } float64 = {
 743                         .f = value->side_float_binary64,
 744                 };
 745
 746                 if (reverse_bo)
 747                         float64.u = side_bswap_64(float64.u);
 748                 printf("%g", (double) float64.f);
 749                 break;
 750 #else
 751                 fprintf(stderr, "ERROR: Unsupported binary64 float type\n");
 752                 abort();
 753 #endif
 754         }
 755         case 16:
 756         {
 757 #if __HAVE_FLOAT128
 758                 union {
 759                         _Float128 f;
 760                         char arr[16];
 761                 } float128 = {
 762                         .f = value->side_float_binary128,
 763                 };
 764
 765                 if (reverse_bo)
 766                         side_bswap_128p(float128.arr);
 767                 printf("%Lg", (long double) float128.f);
 768                 break;
 769 #else
 770                 fprintf(stderr, "ERROR: Unsupported binary128 float type\n");
 771                 abort();
 772 #endif
 773         }
 774         default:
 775                 fprintf(stderr, "ERROR: Unknown float size\n");
 776                 abort();
 777         }
 778 }
 779
 780 static
 781 void tracer_print_type(const struct side_type *type_desc, const struct side_arg *item)
 782 {
 783         enum side_type_label type;
 784
 785         switch (type_desc->type) {
 786         case SIDE_TYPE_ENUM:
 787                 switch (item->type) {
 788                 case SIDE_TYPE_U8:
 789                 case SIDE_TYPE_U16:
 790                 case SIDE_TYPE_U32:
 791                 case SIDE_TYPE_U64:
 792                 case SIDE_TYPE_S8:
 793                 case SIDE_TYPE_S16:
 794                 case SIDE_TYPE_S32:
 795                 case SIDE_TYPE_S64:
 796                         break;
 797                 default:
 798                         fprintf(stderr, "ERROR: type mismatch between description and arguments\n");
 799                         abort();
 800                         break;
 801                 }
 802                 break;
 803
 804         case SIDE_TYPE_ENUM_BITMAP:
 805                 switch (item->type) {
 806                 case SIDE_TYPE_U8:
 807                 case SIDE_TYPE_BYTE:
 808                 case SIDE_TYPE_U16:
 809                 case SIDE_TYPE_U32:
 810                 case SIDE_TYPE_U64:
 811                 case SIDE_TYPE_ARRAY:
 812                 case SIDE_TYPE_VLA:
 813                         break;
 814                 default:
 815                         fprintf(stderr, "ERROR: type mismatch between description and arguments\n");
 816                         abort();
 817                         break;
 818                 }
 819                 break;
 820
 821         case SIDE_TYPE_DYNAMIC:
 822                 switch (item->type) {
 823                 case SIDE_TYPE_DYNAMIC_NULL:
 824                 case SIDE_TYPE_DYNAMIC_BOOL:
 825                 case SIDE_TYPE_DYNAMIC_INTEGER:
 826                 case SIDE_TYPE_DYNAMIC_BYTE:
 827                 case SIDE_TYPE_DYNAMIC_POINTER:
 828                 case SIDE_TYPE_DYNAMIC_FLOAT:
 829                 case SIDE_TYPE_DYNAMIC_STRING:
 830                 case SIDE_TYPE_DYNAMIC_STRUCT:
 831                 case SIDE_TYPE_DYNAMIC_STRUCT_VISITOR:
 832                 case SIDE_TYPE_DYNAMIC_VLA:
 833                 case SIDE_TYPE_DYNAMIC_VLA_VISITOR:
 834                         break;
 835                 default:
 836                         fprintf(stderr, "ERROR: Unexpected dynamic type\n");
 837                         abort();
 838                         break;
 839                 }
 840                 break;
 841
 842         default:
 843                 if (type_desc->type != item->type) {
 844                         fprintf(stderr, "ERROR: type mismatch between description and arguments\n");
 845                         abort();
 846                 }
 847                 break;
 848         }
 849
 850         if (type_desc->type == SIDE_TYPE_ENUM || type_desc->type == SIDE_TYPE_ENUM_BITMAP)
 851                 type = (enum side_type_label) type_desc->type;
 852         else
 853                 type = (enum side_type_label) item->type;
 854
 855         printf("{ ");
 856         switch (type) {
 857                 /* Stack-copy basic types */
 858         case SIDE_TYPE_NULL:
 859                 tracer_print_type_header(":", type_desc->u.side_null.attr, type_desc->u.side_null.nr_attr);
 860                 printf("<NULL TYPE>");
 861                 break;
 862
 863         case SIDE_TYPE_BOOL:
 864                 tracer_print_type_bool(":", &type_desc->u.side_bool, &item->u.side_static.bool_value, 0);
 865                 break;
 866
 867         case SIDE_TYPE_U8:
 868         case SIDE_TYPE_U16:
 869         case SIDE_TYPE_U32:
 870         case SIDE_TYPE_U64:
 871         case SIDE_TYPE_S8:
 872         case SIDE_TYPE_S16:
 873         case SIDE_TYPE_S32:
 874         case SIDE_TYPE_S64:
 875                 tracer_print_type_integer(":", &type_desc->u.side_integer, &item->u.side_static.integer_value, 0,
 876                                 TRACER_DISPLAY_BASE_10);
 877                 break;
 878
 879         case SIDE_TYPE_BYTE:
 880                 tracer_print_type_header(":", type_desc->u.side_byte.attr, type_desc->u.side_byte.nr_attr);
 881                 printf("0x%" PRIx8, item->u.side_static.byte_value);
 882                 break;
 883
 884         case SIDE_TYPE_POINTER:
 885                 tracer_print_type_integer(":", &type_desc->u.side_integer, &item->u.side_static.integer_value, 0,
 886                                 TRACER_DISPLAY_BASE_16);
 887                 break;
 888
 889         case SIDE_TYPE_FLOAT_BINARY16:
 890         case SIDE_TYPE_FLOAT_BINARY32:
 891         case SIDE_TYPE_FLOAT_BINARY64:
 892         case SIDE_TYPE_FLOAT_BINARY128:
 893                 tracer_print_type_float(":", &type_desc->u.side_float, &item->u.side_static.float_value);
 894                 break;
 895
 896         case SIDE_TYPE_STRING:
 897                 tracer_print_type_header(":", type_desc->u.side_string.attr, type_desc->u.side_string.nr_attr);
 898                 printf("\"%s\"", (const char *)(uintptr_t) item->u.side_static.string_value);
 899                 break;
 900
 901                 /* Stack-copy compound types */
 902         case SIDE_TYPE_STRUCT:
 903                 tracer_print_struct(type_desc, item->u.side_static.side_struct);
 904                 break;
 905         case SIDE_TYPE_ARRAY:
 906                 tracer_print_array(type_desc, item->u.side_static.side_array);
 907                 break;
 908         case SIDE_TYPE_VLA:
 909                 tracer_print_vla(type_desc, item->u.side_static.side_vla);
 910                 break;
 911         case SIDE_TYPE_VLA_VISITOR:
 912                 tracer_print_vla_visitor(type_desc, item->u.side_static.side_vla_app_visitor_ctx);
 913                 break;
 914
 915                 /* Stack-copy enumeration types */
 916         case SIDE_TYPE_ENUM:
 917                 print_enum(type_desc, item);
 918                 break;
 919         case SIDE_TYPE_ENUM_BITMAP:
 920                 print_enum_bitmap(type_desc, item);
 921                 break;
 922
 923                 /* Gather basic types */
 924         case SIDE_TYPE_GATHER_BOOL:
 925                 (void) tracer_print_gather_bool_type(&type_desc->u.side_gather, item->u.side_static.side_bool_gather_ptr);
 926                 break;
 927         case SIDE_TYPE_GATHER_INTEGER:
 928                 (void) tracer_print_gather_integer_type(&type_desc->u.side_gather, item->u.side_static.side_integer_gather_ptr,
 929                                         TRACER_DISPLAY_BASE_10);
 930                 break;
 931         case SIDE_TYPE_GATHER_BYTE:
 932                 (void) tracer_print_gather_byte_type(&type_desc->u.side_gather, item->u.side_static.side_byte_gather_ptr);
 933                 break;
 934         case SIDE_TYPE_GATHER_POINTER:
 935                 (void) tracer_print_gather_integer_type(&type_desc->u.side_gather, item->u.side_static.side_integer_gather_ptr,
 936                                         TRACER_DISPLAY_BASE_16);
 937                 break;
 938         case SIDE_TYPE_GATHER_FLOAT:
 939                 (void) tracer_print_gather_float_type(&type_desc->u.side_gather, item->u.side_static.side_float_gather_ptr);
 940                 break;
 941
 942                 /* Gather compound type */
 943         case SIDE_TYPE_GATHER_STRUCT:
 944                 (void) tracer_print_gather_struct(&type_desc->u.side_gather, item->u.side_static.side_struct_gather_ptr);
 945                 break;
 946         case SIDE_TYPE_GATHER_ARRAY:
 947                 (void) tracer_print_gather_array(&type_desc->u.side_gather, item->u.side_static.side_array_gather_ptr);
 948                 break;
 949         case SIDE_TYPE_GATHER_VLA:
 950                 (void) tracer_print_gather_vla(&type_desc->u.side_gather, item->u.side_static.side_vla_gather.ptr,
 951                                 item->u.side_static.side_vla_gather.length_ptr);
 952                 break;
 953
 954         /* Dynamic basic types */
 955         case SIDE_TYPE_DYNAMIC_NULL:
 956         case SIDE_TYPE_DYNAMIC_BOOL:
 957         case SIDE_TYPE_DYNAMIC_INTEGER:
 958         case SIDE_TYPE_DYNAMIC_BYTE:
 959         case SIDE_TYPE_DYNAMIC_POINTER:
 960         case SIDE_TYPE_DYNAMIC_FLOAT:
 961         case SIDE_TYPE_DYNAMIC_STRING:
 962
 963         /* Dynamic compound types */
 964         case SIDE_TYPE_DYNAMIC_STRUCT:
 965         case SIDE_TYPE_DYNAMIC_STRUCT_VISITOR:
 966         case SIDE_TYPE_DYNAMIC_VLA:
 967         case SIDE_TYPE_DYNAMIC_VLA_VISITOR:
 968                 tracer_print_dynamic(item);
 969                 break;
 970         default:
 971                 fprintf(stderr, "<UNKNOWN TYPE>\n");
 972                 abort();
 973         }
 974         printf(" }");
 975 }
 976
 977 static
 978 void tracer_print_field(const struct side_event_field *item_desc, const struct side_arg *item)
 979 {
 980         printf("%s: ", item_desc->field_name);
 981         tracer_print_type(&item_desc->side_type, item);
 982 }
 983
 984 static
 985 void tracer_print_struct(const struct side_type *type_desc, const struct side_arg_vec *side_arg_vec)
 986 {
 987         const struct side_arg *sav = side_arg_vec->sav;
 988         uint32_t i, side_sav_len = side_arg_vec->len;
 989
 990         if (type_desc->u.side_struct->nr_fields != side_sav_len) {
 991                 fprintf(stderr, "ERROR: number of fields mismatch between description and arguments of structure\n");
 992                 abort();
 993         }
 994         print_attributes("attr", ":", type_desc->u.side_struct->attr, type_desc->u.side_struct->nr_attr);
 995         printf("%s", type_desc->u.side_struct->nr_attr ? ", " : "");
 996         printf("fields: { ");
 997         for (i = 0; i < side_sav_len; i++) {
 998                 printf("%s", i ? ", " : "");
 999                 tracer_print_field(&type_desc->u.side_struct->fields[i], &sav[i]);
1000         }
1001         printf(" }");
1002 }
1003
1004 static
1005 void tracer_print_array(const struct side_type *type_desc, const struct side_arg_vec *side_arg_vec)
1006 {
1007         const struct side_arg *sav = side_arg_vec->sav;
1008         uint32_t i, side_sav_len = side_arg_vec->len;
1009
1010         if (type_desc->u.side_array.length != side_sav_len) {
1011                 fprintf(stderr, "ERROR: length mismatch between description and arguments of array\n");
1012                 abort();
1013         }
1014         print_attributes("attr", ":", type_desc->u.side_array.attr, type_desc->u.side_array.nr_attr);
1015         printf("%s", type_desc->u.side_array.nr_attr ? ", " : "");
1016         printf("elements: ");
1017         printf("[ ");
1018         for (i = 0; i < side_sav_len; i++) {
1019                 printf("%s", i ? ", " : "");
1020                 tracer_print_type(type_desc->u.side_array.elem_type, &sav[i]);
1021         }
1022         printf(" ]");
1023 }
1024
1025 static
1026 void tracer_print_vla(const struct side_type *type_desc, const struct side_arg_vec *side_arg_vec)
1027 {
1028         const struct side_arg *sav = side_arg_vec->sav;
1029         uint32_t i, side_sav_len = side_arg_vec->len;
1030
1031         print_attributes("attr", ":", type_desc->u.side_vla.attr, type_desc->u.side_vla.nr_attr);
1032         printf("%s", type_desc->u.side_vla.nr_attr ? ", " : "");
1033         printf("elements: ");
1034         printf("[ ");
1035         for (i = 0; i < side_sav_len; i++) {
1036                 printf("%s", i ? ", " : "");
1037                 tracer_print_type(type_desc->u.side_vla.elem_type, &sav[i]);
1038         }
1039         printf(" ]");
1040 }
1041
1042 static
1043 const char *tracer_gather_access(enum side_type_gather_access_mode access_mode, const char *ptr)
1044 {
1045         switch (access_mode) {
1046         case SIDE_TYPE_GATHER_ACCESS_DIRECT:
1047                 return ptr;
1048         case SIDE_TYPE_GATHER_ACCESS_POINTER:
1049                 /* Dereference pointer */
1050                 memcpy(&ptr, ptr, sizeof(ptr));
1051                 return ptr;
1052         default:
1053                 abort();
1054         }
1055 }
1056
1057 static
1058 uint32_t tracer_gather_size(enum side_type_gather_access_mode access_mode, uint32_t len)
1059 {
1060         switch (access_mode) {
1061         case SIDE_TYPE_GATHER_ACCESS_DIRECT:
1062                 return len;
1063         case SIDE_TYPE_GATHER_ACCESS_POINTER:
1064                 return sizeof(void *);
1065         default:
1066                 abort();
1067         }
1068 }
1069
1070 static
1071 uint64_t tracer_load_gather_integer_type(const struct side_type_gather *type_gather, const void *_ptr)
1072 {
1073         enum side_type_gather_access_mode access_mode =
1074                 (enum side_type_gather_access_mode) type_gather->u.side_integer.access_mode;
1075         uint32_t integer_size_bytes = type_gather->u.side_integer.type.integer_size;
1076         const char *ptr = (const char *) _ptr;
1077         union side_integer_value value;
1078
1079         ptr = tracer_gather_access(access_mode, ptr + type_gather->u.side_integer.offset);
1080         memcpy(&value, ptr, integer_size_bytes);
1081         switch (type_gather->u.side_integer.type.integer_size) {
1082         case 1:
1083                 return (uint64_t) value.side_u8;
1084         case 2:
1085                 return (uint64_t) value.side_u16;
1086         case 4:
1087                 return (uint64_t) value.side_u32;
1088         case 8:
1089                 return (uint64_t) value.side_u64;
1090         default:
1091                 abort();
1092         }
1093 }
1094
1095 static
1096 uint32_t tracer_print_gather_bool_type(const struct side_type_gather *type_gather, const void *_ptr)
1097 {
1098         enum side_type_gather_access_mode access_mode =
1099                 (enum side_type_gather_access_mode) type_gather->u.side_bool.access_mode;
1100         uint32_t bool_size_bytes = type_gather->u.side_bool.type.bool_size;
1101         const char *ptr = (const char *) _ptr;
1102         union side_bool_value value;
1103
1104         switch (bool_size_bytes) {
1105         case 1:
1106         case 2:
1107         case 4:
1108         case 8:
1109                 break;
1110         default:
1111                 abort();
1112         }
1113         ptr = tracer_gather_access(access_mode, ptr + type_gather->u.side_bool.offset);
1114         memcpy(&value, ptr, bool_size_bytes);
1115         tracer_print_type_bool(":", &type_gather->u.side_bool.type, &value,
1116                         type_gather->u.side_bool.offset_bits);
1117         return tracer_gather_size(access_mode, bool_size_bytes);
1118 }
1119
1120 static
1121 uint32_t tracer_print_gather_byte_type(const struct side_type_gather *type_gather, const void *_ptr)
1122 {
1123         enum side_type_gather_access_mode access_mode =
1124                 (enum side_type_gather_access_mode) type_gather->u.side_byte.access_mode;
1125         const char *ptr = (const char *) _ptr;
1126         uint8_t value;
1127
1128         ptr = tracer_gather_access(access_mode, ptr + type_gather->u.side_byte.offset);
1129         memcpy(&value, ptr, 1);
1130         tracer_print_type_header(":", type_gather->u.side_byte.type.attr,
1131                         type_gather->u.side_byte.type.nr_attr);
1132         printf("0x%" PRIx8, value);
1133         return tracer_gather_size(access_mode, 1);
1134 }
1135
1136 static
1137 uint32_t tracer_print_gather_integer_type(const struct side_type_gather *type_gather, const void *_ptr,
1138                 enum tracer_display_base default_base)
1139 {
1140         enum side_type_gather_access_mode access_mode =
1141                 (enum side_type_gather_access_mode) type_gather->u.side_integer.access_mode;
1142         uint32_t integer_size_bytes = type_gather->u.side_integer.type.integer_size;
1143         const char *ptr = (const char *) _ptr;
1144         union side_integer_value value;
1145
1146         switch (integer_size_bytes) {
1147         case 1:
1148         case 2:
1149         case 4:
1150         case 8:
1151                 break;
1152         default:
1153                 abort();
1154         }
1155         ptr = tracer_gather_access(access_mode, ptr + type_gather->u.side_integer.offset);
1156         memcpy(&value, ptr, integer_size_bytes);
1157         tracer_print_type_integer(":", &type_gather->u.side_integer.type, &value,
1158                         type_gather->u.side_integer.offset_bits, default_base);
1159         return tracer_gather_size(access_mode, integer_size_bytes);
1160 }
1161
1162 static
1163 uint32_t tracer_print_gather_float_type(const struct side_type_gather *type_gather, const void *_ptr)
1164 {
1165         enum side_type_gather_access_mode access_mode =
1166                 (enum side_type_gather_access_mode) type_gather->u.side_float.access_mode;
1167         uint32_t float_size_bytes = type_gather->u.side_float.type.float_size;
1168         const char *ptr = (const char *) _ptr;
1169         union side_float_value value;
1170
1171         switch (float_size_bytes) {
1172         case 2:
1173         case 4:
1174         case 8:
1175         case 16:
1176                 break;
1177         default:
1178                 abort();
1179         }
1180         ptr = tracer_gather_access(access_mode, ptr + type_gather->u.side_float.offset);
1181         memcpy(&value, ptr, float_size_bytes);
1182         tracer_print_type_float(":", &type_gather->u.side_float.type, &value);
1183         return tracer_gather_size(access_mode, float_size_bytes);
1184 }
1185
1186 static
1187 uint32_t tracer_print_gather_type(const struct side_type *type_desc, const void *ptr)
1188 {
1189         uint32_t len;
1190
1191         printf("{ ");
1192         switch (type_desc->type) {
1193                 /* Gather basic types */
1194         case SIDE_TYPE_GATHER_BOOL:
1195                 len = tracer_print_gather_bool_type(&type_desc->u.side_gather, ptr);
1196                 break;
1197         case SIDE_TYPE_GATHER_INTEGER:
1198                 len = tracer_print_gather_integer_type(&type_desc->u.side_gather, ptr,
1199                                 TRACER_DISPLAY_BASE_10);
1200                 break;
1201         case SIDE_TYPE_GATHER_BYTE:
1202                 len = tracer_print_gather_byte_type(&type_desc->u.side_gather, ptr);
1203                 break;
1204         case SIDE_TYPE_GATHER_POINTER:
1205                 len = tracer_print_gather_integer_type(&type_desc->u.side_gather, ptr,
1206                                 TRACER_DISPLAY_BASE_16);
1207                 break;
1208         case SIDE_TYPE_GATHER_FLOAT:
1209                 len = tracer_print_gather_float_type(&type_desc->u.side_gather, ptr);
1210                 break;
1211
1212                 /* Gather compound types */
1213         case SIDE_TYPE_GATHER_STRUCT:
1214                 len = tracer_print_gather_struct(&type_desc->u.side_gather, ptr);
1215                 break;
1216         case SIDE_TYPE_GATHER_ARRAY:
1217                 len = tracer_print_gather_array(&type_desc->u.side_gather, ptr);
1218                 break;
1219         case SIDE_TYPE_GATHER_VLA:
1220                 len = tracer_print_gather_vla(&type_desc->u.side_gather, ptr, ptr);
1221                 break;
1222         default:
1223                 fprintf(stderr, "<UNKNOWN GATHER TYPE>");
1224                 abort();
1225         }
1226         printf(" }");
1227         return len;
1228 }
1229
1230 static
1231 void tracer_print_gather_field(const struct side_event_field *field, const void *ptr)
1232 {
1233         printf("%s: ", field->field_name);
1234         (void) tracer_print_gather_type(&field->side_type, ptr);
1235 }
1236
1237 static
1238 uint32_t tracer_print_gather_struct(const struct side_type_gather *type_gather, const void *_ptr)
1239 {
1240         enum side_type_gather_access_mode access_mode =
1241                 (enum side_type_gather_access_mode) type_gather->u.side_struct.access_mode;
1242         const char *ptr = (const char *) _ptr;
1243         uint32_t i;
1244
1245         ptr = tracer_gather_access(access_mode, ptr + type_gather->u.side_struct.offset);
1246         print_attributes("attr", ":", type_gather->u.side_struct.type->attr, type_gather->u.side_struct.type->nr_attr);
1247         printf("%s", type_gather->u.side_struct.type->nr_attr ? ", " : "");
1248         printf("fields: { ");
1249         for (i = 0; i < type_gather->u.side_struct.type->nr_fields; i++) {
1250                 printf("%s", i ? ", " : "");
1251                 tracer_print_gather_field(&type_gather->u.side_struct.type->fields[i], ptr);
1252         }
1253         printf(" }");
1254         return tracer_gather_size(access_mode, type_gather->u.side_struct.size);
1255 }
1256
1257 static
1258 uint32_t tracer_print_gather_array(const struct side_type_gather *type_gather, const void *_ptr)
1259 {
1260         enum side_type_gather_access_mode access_mode =
1261                 (enum side_type_gather_access_mode) type_gather->u.side_array.access_mode;
1262         const char *ptr = (const char *) _ptr, *orig_ptr;
1263         uint32_t i;
1264
1265         ptr = tracer_gather_access(access_mode, ptr + type_gather->u.side_array.offset);
1266         orig_ptr = ptr;
1267         print_attributes("attr", ":", type_gather->u.side_array.type.attr, type_gather->u.side_array.type.nr_attr);
1268         printf("%s", type_gather->u.side_array.type.nr_attr ? ", " : "");
1269         printf("elements: ");
1270         printf("[ ");
1271         for (i = 0; i < type_gather->u.side_array.type.length; i++) {
1272                 switch (type_gather->u.side_array.type.elem_type->type) {
1273                 case SIDE_TYPE_GATHER_VLA:
1274                         fprintf(stderr, "<gather VLA only supported within gather structures>\n");
1275                         abort();
1276                 default:
1277                         break;
1278                 }
1279                 printf("%s", i ? ", " : "");
1280                 ptr += tracer_print_gather_type(type_gather->u.side_array.type.elem_type, ptr);
1281         }
1282         printf(" ]");
1283         return tracer_gather_size(access_mode, ptr - orig_ptr);
1284 }
1285
1286 static
1287 uint32_t tracer_print_gather_vla(const struct side_type_gather *type_gather, const void *_ptr,
1288                 const void *_length_ptr)
1289 {
1290         enum side_type_gather_access_mode access_mode =
1291                 (enum side_type_gather_access_mode) type_gather->u.side_vla.access_mode;
1292         const char *ptr = (const char *) _ptr, *orig_ptr;
1293         const char *length_ptr = (const char *) _length_ptr;
1294         uint32_t i, length;
1295
1296         /* Access length */
1297         switch (type_gather->u.side_vla.length_type->type) {
1298         case SIDE_TYPE_GATHER_INTEGER:
1299                 break;
1300         default:
1301                 fprintf(stderr, "<gather VLA expects integer gather length type>\n");
1302                 abort();
1303         }
1304         length = (uint32_t) tracer_load_gather_integer_type(&type_gather->u.side_vla.length_type->u.side_gather, length_ptr);
1305         ptr = tracer_gather_access(access_mode, ptr + type_gather->u.side_vla.offset);
1306         orig_ptr = ptr;
1307         print_attributes("attr", ":", type_gather->u.side_vla.type.attr, type_gather->u.side_vla.type.nr_attr);
1308         printf("%s", type_gather->u.side_vla.type.nr_attr ? ", " : "");
1309         printf("elements: ");
1310         printf("[ ");
1311         for (i = 0; i < length; i++) {
1312                 switch (type_gather->u.side_vla.type.elem_type->type) {
1313                 case SIDE_TYPE_GATHER_VLA:
1314                         fprintf(stderr, "<gather VLA only supported within gather structures>\n");
1315                         abort();
1316                 default:
1317                         break;
1318                 }
1319                 printf("%s", i ? ", " : "");
1320                 ptr += tracer_print_gather_type(type_gather->u.side_vla.type.elem_type, ptr);
1321         }
1322         printf(" ]");
1323         return tracer_gather_size(access_mode, ptr - orig_ptr);
1324 }
1325
1326 struct tracer_visitor_priv {
1327         const struct side_type *elem_type;
1328         int i;
1329 };
1330
1331 static
1332 enum side_visitor_status tracer_write_elem_cb(const struct side_tracer_visitor_ctx *tracer_ctx,
1333                         const struct side_arg *elem)
1334 {
1335         struct tracer_visitor_priv *tracer_priv = (struct tracer_visitor_priv *) tracer_ctx->priv;
1336
1337         printf("%s", tracer_priv->i++ ? ", " : "");
1338         tracer_print_type(tracer_priv->elem_type, elem);
1339         return SIDE_VISITOR_STATUS_OK;
1340 }
1341
1342 static
1343 void tracer_print_vla_visitor(const struct side_type *type_desc, void *app_ctx)
1344 {
1345         enum side_visitor_status status;
1346         struct tracer_visitor_priv tracer_priv = {
1347                 .elem_type = type_desc->u.side_vla_visitor.elem_type,
1348                 .i = 0,
1349         };
1350         const struct side_tracer_visitor_ctx tracer_ctx = {
1351                 .write_elem = tracer_write_elem_cb,
1352                 .priv = &tracer_priv,
1353         };
1354
1355         print_attributes("attr", ":", type_desc->u.side_vla_visitor.attr, type_desc->u.side_vla_visitor.nr_attr);
1356         printf("%s", type_desc->u.side_vla_visitor.nr_attr ? ", " : "");
1357         printf("elements: ");
1358         printf("[ ");
1359         status = type_desc->u.side_vla_visitor.visitor(&tracer_ctx, app_ctx);
1360         switch (status) {
1361         case SIDE_VISITOR_STATUS_OK:
1362                 break;
1363         case SIDE_VISITOR_STATUS_ERROR:
1364                 fprintf(stderr, "ERROR: Visitor error\n");
1365                 abort();
1366         }
1367         printf(" ]");
1368 }
1369
1370 static
1371 void tracer_print_dynamic_struct(const struct side_arg_dynamic_struct *dynamic_struct)
1372 {
1373         const struct side_arg_dynamic_field *fields = dynamic_struct->fields;
1374         uint32_t i, len = dynamic_struct->len;
1375
1376         print_attributes("attr", "::", dynamic_struct->attr, dynamic_struct->nr_attr);
1377         printf("%s", dynamic_struct->nr_attr ? ", " : "");
1378         printf("fields:: ");
1379         printf("[ ");
1380         for (i = 0; i < len; i++) {
1381                 printf("%s", i ? ", " : "");
1382                 printf("%s:: ", fields[i].field_name);
1383                 tracer_print_dynamic(&fields[i].elem);
1384         }
1385         printf(" ]");
1386 }
1387
1388 struct tracer_dynamic_struct_visitor_priv {
1389         int i;
1390 };
1391
1392 static
1393 enum side_visitor_status tracer_dynamic_struct_write_elem_cb(
1394                         const struct side_tracer_dynamic_struct_visitor_ctx *tracer_ctx,
1395                         const struct side_arg_dynamic_field *dynamic_field)
1396 {
1397         struct tracer_dynamic_struct_visitor_priv *tracer_priv =
1398                 (struct tracer_dynamic_struct_visitor_priv *) tracer_ctx->priv;
1399
1400         printf("%s", tracer_priv->i++ ? ", " : "");
1401         printf("%s:: ", dynamic_field->field_name);
1402         tracer_print_dynamic(&dynamic_field->elem);
1403         return SIDE_VISITOR_STATUS_OK;
1404 }
1405
1406 static
1407 void tracer_print_dynamic_struct_visitor(const struct side_arg *item)
1408 {
1409         enum side_visitor_status status;
1410         struct tracer_dynamic_struct_visitor_priv tracer_priv = {
1411                 .i = 0,
1412         };
1413         const struct side_tracer_dynamic_struct_visitor_ctx tracer_ctx = {
1414                 .write_field = tracer_dynamic_struct_write_elem_cb,
1415                 .priv = &tracer_priv,
1416         };
1417         void *app_ctx = item->u.side_dynamic.side_dynamic_struct_visitor.app_ctx;
1418
1419         print_attributes("attr", "::", item->u.side_dynamic.side_dynamic_struct_visitor.attr, item->u.side_dynamic.side_dynamic_struct_visitor.nr_attr);
1420         printf("%s", item->u.side_dynamic.side_dynamic_struct_visitor.nr_attr ? ", " : "");
1421         printf("fields:: ");
1422         printf("[ ");
1423         status = item->u.side_dynamic.side_dynamic_struct_visitor.visitor(&tracer_ctx, app_ctx);
1424         switch (status) {
1425         case SIDE_VISITOR_STATUS_OK:
1426                 break;
1427         case SIDE_VISITOR_STATUS_ERROR:
1428                 fprintf(stderr, "ERROR: Visitor error\n");
1429                 abort();
1430         }
1431         printf(" ]");
1432 }
1433
1434 static
1435 void tracer_print_dynamic_vla(const struct side_arg_dynamic_vla *vla)
1436 {
1437         const struct side_arg *sav = vla->sav;
1438         uint32_t i, side_sav_len = vla->len;
1439
1440         print_attributes("attr", "::", vla->attr, vla->nr_attr);
1441         printf("%s", vla->nr_attr ? ", " : "");
1442         printf("elements:: ");
1443         printf("[ ");
1444         for (i = 0; i < side_sav_len; i++) {
1445                 printf("%s", i ? ", " : "");
1446                 tracer_print_dynamic(&sav[i]);
1447         }
1448         printf(" ]");
1449 }
1450
1451 struct tracer_dynamic_vla_visitor_priv {
1452         int i;
1453 };
1454
1455 static
1456 enum side_visitor_status tracer_dynamic_vla_write_elem_cb(
1457                         const struct side_tracer_visitor_ctx *tracer_ctx,
1458                         const struct side_arg *elem)
1459 {
1460         struct tracer_dynamic_vla_visitor_priv *tracer_priv =
1461                 (struct tracer_dynamic_vla_visitor_priv *) tracer_ctx->priv;
1462
1463         printf("%s", tracer_priv->i++ ? ", " : "");
1464         tracer_print_dynamic(elem);
1465         return SIDE_VISITOR_STATUS_OK;
1466 }
1467
1468 static
1469 void tracer_print_dynamic_vla_visitor(const struct side_arg *item)
1470 {
1471         enum side_visitor_status status;
1472         struct tracer_dynamic_vla_visitor_priv tracer_priv = {
1473                 .i = 0,
1474         };
1475         const struct side_tracer_visitor_ctx tracer_ctx = {
1476                 .write_elem = tracer_dynamic_vla_write_elem_cb,
1477                 .priv = &tracer_priv,
1478         };
1479         void *app_ctx = item->u.side_dynamic.side_dynamic_vla_visitor.app_ctx;
1480
1481         print_attributes("attr", "::", item->u.side_dynamic.side_dynamic_vla_visitor.attr, item->u.side_dynamic.side_dynamic_vla_visitor.nr_attr);
1482         printf("%s", item->u.side_dynamic.side_dynamic_vla_visitor.nr_attr ? ", " : "");
1483         printf("elements:: ");
1484         printf("[ ");
1485         status = item->u.side_dynamic.side_dynamic_vla_visitor.visitor(&tracer_ctx, app_ctx);
1486         switch (status) {
1487         case SIDE_VISITOR_STATUS_OK:
1488                 break;
1489         case SIDE_VISITOR_STATUS_ERROR:
1490                 fprintf(stderr, "ERROR: Visitor error\n");
1491                 abort();
1492         }
1493         printf(" ]");
1494 }
1495
1496 static
1497 void tracer_print_dynamic(const struct side_arg *item)
1498 {
1499         printf("{ ");
1500         switch (item->type) {
1501                 /* Dynamic basic types */
1502         case SIDE_TYPE_DYNAMIC_NULL:
1503                 tracer_print_type_header("::", item->u.side_dynamic.side_null.attr, item->u.side_dynamic.side_null.nr_attr);
1504                 printf("<NULL TYPE>");
1505                 break;
1506         case SIDE_TYPE_DYNAMIC_BOOL:
1507                 tracer_print_type_bool("::", &item->u.side_dynamic.side_bool.type, &item->u.side_dynamic.side_bool.value, 0);
1508                 break;
1509         case SIDE_TYPE_DYNAMIC_INTEGER:
1510                 tracer_print_type_integer("::", &item->u.side_dynamic.side_integer.type, &item->u.side_dynamic.side_integer.value, 0,
1511                                 TRACER_DISPLAY_BASE_10);
1512                 break;
1513         case SIDE_TYPE_DYNAMIC_BYTE:
1514                 tracer_print_type_header("::", item->u.side_dynamic.side_byte.type.attr, item->u.side_dynamic.side_byte.type.nr_attr);
1515                 printf("0x%" PRIx8, item->u.side_dynamic.side_byte.value);
1516                 break;
1517         case SIDE_TYPE_DYNAMIC_POINTER:
1518                 tracer_print_type_integer("::", &item->u.side_dynamic.side_integer.type, &item->u.side_dynamic.side_integer.value, 0,
1519                                 TRACER_DISPLAY_BASE_16);
1520                 break;
1521         case SIDE_TYPE_DYNAMIC_FLOAT:
1522                 tracer_print_type_float("::", &item->u.side_dynamic.side_float.type,
1523                                         &item->u.side_dynamic.side_float.value);
1524                 break;
1525         case SIDE_TYPE_DYNAMIC_STRING:
1526                 tracer_print_type_header("::", item->u.side_dynamic.side_string.type.attr, item->u.side_dynamic.side_string.type.nr_attr);
1527                 printf("\"%s\"", (const char *)(uintptr_t) item->u.side_dynamic.side_string.value);
1528                 break;
1529
1530                 /* Dynamic compound types */
1531         case SIDE_TYPE_DYNAMIC_STRUCT:
1532                 tracer_print_dynamic_struct(item->u.side_dynamic.side_dynamic_struct);
1533                 break;
1534         case SIDE_TYPE_DYNAMIC_STRUCT_VISITOR:
1535                 tracer_print_dynamic_struct_visitor(item);
1536                 break;
1537         case SIDE_TYPE_DYNAMIC_VLA:
1538                 tracer_print_dynamic_vla(item->u.side_dynamic.side_dynamic_vla);
1539                 break;
1540         case SIDE_TYPE_DYNAMIC_VLA_VISITOR:
1541                 tracer_print_dynamic_vla_visitor(item);
1542                 break;
1543         default:
1544                 fprintf(stderr, "<UNKNOWN TYPE>\n");
1545                 abort();
1546         }
1547         printf(" }");
1548 }
1549
1550 static
1551 void tracer_print_static_fields(const struct side_event_description *desc,
1552                 const struct side_arg_vec *side_arg_vec,
1553                 uint32_t *nr_items)
1554 {
1555         const struct side_arg *sav = side_arg_vec->sav;
1556         uint32_t i, side_sav_len = side_arg_vec->len;
1557
1558         printf("provider: %s, event: %s", desc->provider_name, desc->event_name);
1559         if (desc->nr_fields != side_sav_len) {
1560                 fprintf(stderr, "ERROR: number of fields mismatch between description and arguments\n");
1561                 abort();
1562         }
1563         print_attributes(", attr", ":", desc->attr, desc->nr_attr);
1564         printf("%s", side_sav_len ? ", fields: [ " : "");
1565         for (i = 0; i < side_sav_len; i++) {
1566                 printf("%s", i ? ", " : "");
1567                 tracer_print_field(&desc->fields[i], &sav[i]);
1568         }
1569         if (nr_items)
1570                 *nr_items = i;
1571         if (side_sav_len)
1572                 printf(" ]");
1573 }
1574
1575 void tracer_call(const struct side_event_description *desc,
1576                 const struct side_arg_vec *side_arg_vec,
1577                 void *priv __attribute__((unused)))
1578 {
1579         uint32_t nr_fields = 0;
1580
1581         tracer_print_static_fields(desc, side_arg_vec, &nr_fields);
1582         printf("\n");
1583 }
1584
1585 void tracer_call_variadic(const struct side_event_description *desc,
1586                 const struct side_arg_vec *side_arg_vec,
1587                 const struct side_arg_dynamic_struct *var_struct,
1588                 void *priv __attribute__((unused)))
1589 {
1590         uint32_t nr_fields = 0, i, var_struct_len = var_struct->len;
1591
1592         tracer_print_static_fields(desc, side_arg_vec, &nr_fields);
1593
1594         if (side_unlikely(!(desc->flags & SIDE_EVENT_FLAG_VARIADIC))) {
1595                 fprintf(stderr, "ERROR: unexpected non-variadic event description\n");
1596                 abort();
1597         }
1598         print_attributes(", attr ", "::", var_struct->attr, var_struct->nr_attr);
1599         printf("%s", var_struct_len ? ", fields:: [ " : "");
1600         for (i = 0; i < var_struct_len; i++, nr_fields++) {
1601                 printf("%s", i ? ", " : "");
1602                 printf("%s:: ", var_struct->fields[i].field_name);
1603                 tracer_print_dynamic(&var_struct->fields[i].elem);
1604         }
1605         if (i)
1606                 printf(" ]");
1607         printf("\n");
1608 }
1609
1610 void tracer_event_notification(enum side_tracer_notification notif,
1611                 struct side_event_description **events, uint32_t nr_events, void *priv)
1612 {
1613         uint32_t i;
1614         int ret;
1615
1616         printf("----------------------------------------------------------\n");
1617         printf("Tracer notified of events %s\n",
1618                 notif == SIDE_TRACER_NOTIFICATION_INSERT_EVENTS ? "inserted" : "removed");
1619         for (i = 0; i < nr_events; i++) {
1620                 struct side_event_description *event = events[i];
1621
1622                 /* Skip NULL pointers */
1623                 if (!event)
1624                         continue;
1625                 printf("provider: %s, event: %s\n",
1626                         event->provider_name, event->event_name);
1627                 if  (notif == SIDE_TRACER_NOTIFICATION_INSERT_EVENTS) {
1628                         if (event->flags & SIDE_EVENT_FLAG_VARIADIC) {
1629                                 ret = side_tracer_callback_variadic_register(event, tracer_call_variadic, NULL);
1630                                 if (ret)
1631                                         abort();
1632                         } else {
1633                                 ret = side_tracer_callback_register(event, tracer_call, NULL);
1634                                 if (ret)
1635                                         abort();
1636                         }
1637                 } else {
1638                         if (event->flags & SIDE_EVENT_FLAG_VARIADIC) {
1639                                 ret = side_tracer_callback_variadic_unregister(event, tracer_call_variadic, NULL);
1640                                 if (ret)
1641                                         abort();
1642                         } else {
1643                                 ret = side_tracer_callback_unregister(event, tracer_call, NULL);
1644                                 if (ret)
1645                                         abort();
1646                         }
1647                 }
1648         }
1649         printf("----------------------------------------------------------\n");
1650 }
1651
1652 static __attribute__((constructor))
1653 void tracer_init(void);
1654 static
1655 void tracer_init(void)
1656 {
1657         tracer_handle = side_tracer_event_notification_register(tracer_event_notification, NULL);
1658         if (!tracer_handle)
1659                 abort();
1660 }
1661
1662 static __attribute__((destructor))
1663 void tracer_exit(void);
1664 static
1665 void tracer_exit(void)
1666 {
1667         side_tracer_event_notification_unregister(tracer_handle);
1668 }