formats/ctf/metadata/ctf-visitor-generate-io-struct.c

   1 /*
   2  * ctf-visitor-generate-io-struct.c
   3  *
   4  * Common Trace Format Metadata Visitor (generate I/O structures).
   5  *
   6  * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  */
  18
  19 #include <stdio.h>
  20 #include <unistd.h>
  21 #include <string.h>
  22 #include <stdlib.h>
  23 #include <assert.h>
  24 #include <glib.h>
  25 #include <inttypes.h>
  26 #include <errno.h>
  27 #include <babeltrace/list.h>
  28 #include <uuid/uuid.h>
  29 #include "ctf-scanner.h"
  30 #include "ctf-parser.h"
  31 #include "ctf-ast.h"
  32
  33 #define fprintf_dbg(fd, fmt, args...)   fprintf(fd, "%s: " fmt, __func__, ## args)
  34
  35 #define _cds_list_first_entry(ptr, type, member)        \
  36         cds_list_entry((ptr)->next, type, member)
  37
  38 static
  39 int ctf_visitor_print_type_specifier(FILE *fd, int depth, struct ctf_node *node)
  40 {
  41         print_tabs(fd, depth);
  42         fprintf(fd, "<type_specifier \"");
  43
  44         switch (node->u.type_specifier.type) {
  45         case TYPESPEC_VOID:
  46                 fprintf(fd, "void");
  47                 break;
  48         case TYPESPEC_CHAR:
  49                 fprintf(fd, "char");
  50                 break;
  51         case TYPESPEC_SHORT:
  52                 fprintf(fd, "short");
  53                 break;
  54         case TYPESPEC_INT:
  55                 fprintf(fd, "int");
  56                 break;
  57         case TYPESPEC_LONG:
  58                 fprintf(fd, "long");
  59                 break;
  60         case TYPESPEC_FLOAT:
  61                 fprintf(fd, "float");
  62                 break;
  63         case TYPESPEC_DOUBLE:
  64                 fprintf(fd, "double");
  65                 break;
  66         case TYPESPEC_SIGNED:
  67                 fprintf(fd, "signed");
  68                 break;
  69         case TYPESPEC_UNSIGNED:
  70                 fprintf(fd, "unsigned");
  71                 break;
  72         case TYPESPEC_BOOL:
  73                 fprintf(fd, "bool");
  74                 break;
  75         case TYPESPEC_COMPLEX:
  76                 fprintf(fd, "_Complex");
  77                 break;
  78         case TYPESPEC_IMAGINARY:
  79                 fprintf(fd, "_Imaginary");
  80                 break;
  81         case TYPESPEC_CONST:
  82                 fprintf(fd, "const");
  83                 break;
  84         case TYPESPEC_ID_TYPE:
  85                 fprintf(fd, "%s", node->u.type_specifier.id_type);
  86                 break;
  87
  88         case TYPESPEC_UNKNOWN:
  89         default:
  90                 fprintf(stderr, "[error] %s: unknown type specifier %d\n", __func__,
  91                         (int) node->u.type_specifier.type);
  92                 return -EINVAL;
  93         }
  94         fprintf(fd, "\"/>\n");
  95         return 0;
  96 }
  97
  98 static
  99 int ctf_visitor_print_type_declarator(FILE *fd, int depth, struct ctf_node *node)
 100 {
 101         int ret = 0;
 102         struct ctf_node *iter;
 103
 104         print_tabs(fd, depth);
 105         fprintf(fd, "<type_declarator>\n");
 106         depth++;
 107
 108         if (!cds_list_empty(&node->u.type_declarator.pointers)) {
 109                 print_tabs(fd, depth);
 110                 fprintf(fd, "<pointers>\n");
 111                 cds_list_for_each_entry(iter, &node->u.type_declarator.pointers,
 112                                         siblings) {
 113                         ret = ctf_visitor_print_xml(fd, depth + 1, iter);
 114                         if (ret)
 115                                 return ret;
 116                 }
 117                 print_tabs(fd, depth);
 118                 fprintf(fd, "</pointers>\n");
 119         }
 120
 121         switch (node->u.type_declarator.type) {
 122         case TYPEDEC_ID:
 123                 if (node->u.type_declarator.u.id) {
 124                         print_tabs(fd, depth);
 125                         fprintf(fd, "<id \"");
 126                         fprintf(fd, "%s", node->u.type_declarator.u.id);
 127                         fprintf(fd, "\" />\n");
 128                 }
 129                 break;
 130         case TYPEDEC_NESTED:
 131                 if (node->u.type_declarator.u.nested.type_declarator) {
 132                         print_tabs(fd, depth);
 133                         fprintf(fd, "<type_declarator>\n");
 134                         ret = ctf_visitor_print_xml(fd, depth + 1,
 135                                 node->u.type_declarator.u.nested.type_declarator);
 136                         if (ret)
 137                                 return ret;
 138                         print_tabs(fd, depth);
 139                         fprintf(fd, "</type_declarator>\n");
 140                 }
 141                 if (node->u.type_declarator.u.nested.length) {
 142                         print_tabs(fd, depth);
 143                         fprintf(fd, "<length>\n");
 144                         ret = ctf_visitor_print_xml(fd, depth + 1,
 145                                 node->u.type_declarator.u.nested.length);
 146                         if (ret)
 147                                 return ret;
 148                         print_tabs(fd, depth);
 149                         fprintf(fd, "</length>\n");
 150                 }
 151                 if (node->u.type_declarator.u.nested.abstract_array) {
 152                         print_tabs(fd, depth);
 153                         fprintf(fd, "<length>\n");
 154                         print_tabs(fd, depth);
 155                         fprintf(fd, "</length>\n");
 156                 }
 157                 if (node->u.type_declarator.bitfield_len) {
 158                         print_tabs(fd, depth);
 159                         fprintf(fd, "<bitfield_len>\n");
 160                         ret = ctf_visitor_print_xml(fd, depth + 1,
 161                                 node->u.type_declarator.bitfield_len);
 162                         if (ret)
 163                                 return ret;
 164                         print_tabs(fd, depth);
 165                         fprintf(fd, "</bitfield_len>\n");
 166                 }
 167                 break;
 168         case TYPEDEC_UNKNOWN:
 169         default:
 170                 fprintf(stderr, "[error] %s: unknown type declarator %d\n", __func__,
 171                         (int) node->u.type_declarator.type);
 172                 return -EINVAL;
 173         }
 174
 175         depth--;
 176         print_tabs(fd, depth);
 177         fprintf(fd, "</type_declarator>\n");
 178         return 0;
 179 }
 180
 181 /*
 182  * String returned must be freed by the caller using g_free.
 183  */
 184 static
 185 char *concatenate_unary_strings(struct list_head *head)
 186 {
 187         struct ctf_node *node;
 188         GString *str;
 189         int i = 0;
 190
 191         str = g_string_new();
 192         cds_list_for_each_entry(node, head, siblings) {
 193                 char *src_string;
 194
 195                 assert(node->type == NODE_UNARY_EXPRESSION);
 196                 assert(node->u.unary_expression.type == UNARY_STRING);
 197                 assert((node->u.unary_expression.link == UNARY_LINK_UNKNOWN)
 198                         ^ (i != 0))
 199                 switch (node->u.unary_expression.link) {
 200                 case UNARY_DOTLINK:
 201                         g_string_append(str, ".")
 202                         break;
 203                 case UNARY_ARROWLINK:
 204                         g_string_append(str, "->")
 205                         break;
 206                 case UNARY_DOTDOTDOT:
 207                         g_string_append(str, "...")
 208                         break;
 209                 }
 210                 src_string = u.unary_expression.u.string;
 211                 g_string_append(str, src_string);
 212                 i++;
 213         }
 214         return g_string_free(str, FALSE);
 215 }
 216
 217 static
 218 int get_unary_unsigned(struct list_head *head, uint64_t *value)
 219 {
 220         struct ctf_node *node;
 221         int i = 0;
 222
 223         cds_list_for_each_entry(node, head, siblings) {
 224                 assert(node->type == NODE_UNARY_EXPRESSION);
 225                 assert(node->u.unary_expression.type == UNARY_UNSIGNED_CONSTANT);
 226                 assert(node->u.unary_expression.link == UNARY_LINK_UNKNOWN);
 227                 assert(i == 0);
 228                 *value = node->u.unary_expression.unsigned_constant
 229                 i++;
 230         }
 231         return 0;
 232 }
 233
 234 static
 235 int get_unary_uuid(struct list_head *head, uuid_t *uuid)
 236 {
 237         struct ctf_node *node;
 238         int i = 0;
 239         int ret = -1;
 240
 241         cds_list_for_each_entry(node, head, siblings) {
 242                 const char *src_string;
 243
 244                 assert(node->type == NODE_UNARY_EXPRESSION);
 245                 assert(node->u.unary_expression.type == UNARY_STRING);
 246                 assert(node->u.unary_expression.link == UNARY_LINK_UNKNOWN);
 247                 assert(i == 0);
 248                 src_string = u.unary_expression.u.string;
 249                 ret = uuid_parse(u.unary_expression.u.string, *uuid);
 250         }
 251         return ret;
 252 }
 253
 254 static
 255 struct ctf_stream *trace_stream_lookup(struct ctf_trace *trace, uint64_t stream_id)
 256 {
 257         if (trace->streams->len <= stream_id)
 258                 return NULL;
 259         return g_ptr_array_index(trace->streams, stream_id);
 260 }
 261
 262 /*
 263  * Also add named variant, struct or enum to the current declaration scope.
 264  */
 265 static
 266 struct ctf_declaration *ctf_declaration_specifier_visit(FILE *fd,
 267                 int depth, struct list_head *head,
 268                 struct declaration_scope *declaration_scope)
 269 {
 270         struct ctf_declaration *declaration;
 271         struct node *first;
 272
 273         first = _cds_list_first_entry(head, struct node, siblings);
 274
 275         switch (first->type) {
 276         case NODE_STRUCT:
 277                 /*
 278                  * For named struct (without body), lookup in
 279                  * declaration scope and create declaration copy.
 280                  */
 281                 /* For named struct (with body), create type and add to declaration scope */
 282                 /* For unnamed struct, create type */
 283                 break;
 284         case NODE_VARIANT:
 285                 /*
 286                  * For named variant (without body), lookup in
 287                  * declaration scope and create declaration copy.
 288                  */
 289                 /* For named variant (with body), create type and add to declaration scope */
 290                 /* For unnamed variant, create type */
 291                 /* If variant has a tag field specifier, assign tag name. */
 292                 break;
 293         case NODE_ENUM:
 294                 /*
 295                  * For named enum (without body), lookup in declaration
 296                  * scope and create declaration copy.
 297                  */
 298                 /* For named enum (with body), create type and add to declaration scope */
 299                 /* For unnamed enum, create type */
 300                 /* Enumerations need to have their size/type specifier (< >). */
 301                 break;
 302         case NODE_INTEGER:
 303                 /*
 304                  * Create an integer declaration.
 305                  */
 306                 break;
 307         case NODE_FLOATING_POINT:
 308                 /*
 309                  * Create a floating point declaration.
 310                  */
 311                 break;
 312         case NODE_STRING:
 313                 /*
 314                  * Create a string declaration.
 315                  */
 316                 break;
 317         case NODE_TYPE_SPECIFIER:
 318                 /*
 319                  * Lookup named type in typedef declarations (in
 320                  * declaration scope). Create a copy of the declaration.
 321                  */
 322                 break;
 323
 324         }
 325 }
 326
 327 static
 328 int ctf_typedef_declarator_visit(FILE *fd, int depth,
 329                 struct list_head *declaration_specifier,
 330                 struct node *type_declarator,
 331                 struct declaration_scope *declaration_scope)
 332 {
 333         /*
 334          * Build the type using declaration specifier (creating
 335          * declaration from type_specifier), then apply type declarator,
 336          * add the resulting type to the current declaration scope.
 337          */
 338         cds_list_for_each_entry(iter, declaration_specifier, siblings) {
 339
 340
 341         }
 342         return 0;
 343 }
 344
 345 static
 346 int ctf_typedef_visit(FILE *fd, int depth,
 347                 struct list_head *declaration_specifier,
 348                 struct list_head *type_declarators,
 349                 struct declaration_scope *declaration_scope)
 350 {
 351         struct ctf_node *iter;
 352
 353         cds_list_for_each_entry(iter, type_declarators, siblings) {
 354                 ret = ctf_typedef_declarator_visit(fd, depth + 1,
 355                         &node->u._typedef.declaration_specifier, iter,
 356                         declaration_scope);
 357                 if (ret)
 358                         return ret;
 359         }
 360         return 0;
 361 }
 362
 363 static
 364 int ctf_typealias_visit(FILE *fd, int depth, struct ctf_node *target,
 365                 struct ctf_node *alias,
 366                 struct declaration_scope *declaration_scope)
 367 {
 368         /*
 369          * Build target type, check that it is reachable in current
 370          * declaration scope.
 371          */
 372
 373         /* Only one type declarator is allowed */
 374
 375         /* Build alias type, add to current declaration scope. */
 376         /* Only one type declarator is allowed */
 377 }
 378
 379 static
 380 int ctf_event_declaration_visit(FILE *fd, int depth, struct ctf_node *node, struct ctf_event *event, struct ctf_trace *trace)
 381 {
 382         int ret = 0;
 383
 384         switch (node->type) {
 385         case NODE_TYPEDEF:
 386                 ret = ctf_typedef_visit(fd, depth + 1,
 387                                         &node->u._typedef.declaration_specifier,
 388                                         &node->u._typedef.type_declarators,
 389                                         event->declaration_scope);
 390                 if (ret)
 391                         return ret;
 392                 break;
 393         case NODE_TYPEALIAS:
 394                 ret = ctf_typealias_visit(fd, depth + 1,
 395                                 &node->u.typealias.target, &node->u.typealias.alias
 396                                 event->declaration_scope);
 397                 if (ret)
 398                         return ret;
 399                 break;
 400         case NODE_CTF_EXPRESSION:
 401         {
 402                 char *left;
 403
 404                 left = concatenate_unary_strings(&node->u.ctf_expression.left);
 405                 if (!strcmp(left, "name")) {
 406                         char *right;
 407
 408                         if (CTF_EVENT_FIELD_IS_SET(event, name))
 409                                 return -EPERM;
 410                         right = concatenate_unary_strings(&node->u.ctf_expression.right);
 411                         if (!right) {
 412                                 fprintf(stderr, "[error] %s: unexpected unary expression for event name\n", __func__);
 413                                 return -EINVAL;
 414                         }
 415                         event->name = g_quark_from_string(right);
 416                         g_free(right);
 417                         CTF_EVENT_SET_FIELD(event, name);
 418                 } else if (!strcmp(left, "id")) {
 419                         if (CTF_EVENT_FIELD_IS_SET(event, id))
 420                                 return -EPERM;
 421                         ret = get_unary_unsigned(&node->u.ctf_expression.right, &event->id);
 422                         if (ret) {
 423                                 fprintf(stderr, "[error] %s: unexpected unary expression for event id\n", __func__);
 424                                 return -EINVAL;
 425                         }
 426                         CTF_EVENT_SET_FIELD(event, id);
 427                 } else if (!strcmp(left, "stream_id")) {
 428                         if (CTF_EVENT_FIELD_IS_SET(event, stream_id))
 429                                 return -EPERM;
 430                         ret = get_unary_unsigned(&node->u.ctf_expression.right, &event->stream_id);
 431                         if (ret) {
 432                                 fprintf(stderr, "[error] %s: unexpected unary expression for event stream_id\n", __func__);
 433                                 return -EINVAL;
 434                         }
 435                         event->stream = trace_stream_lookup(trace, event->stream_id);
 436                         if (!event->stream) {
 437                                 fprintf(stderr, "[error] %s: stream id %" PRIu64 " cannot be found\n", __func__, event->stream_id);
 438                                 return -EINVAL;
 439                         }
 440                         CTF_EVENT_SET_FIELD(event, stream_id);
 441                 } else if (!strcmp(left, "context")) {
 442                         struct declaration *declaration;
 443
 444                         if (!event->definition_scope)
 445                                 return -EPERM;
 446                         declaration = ctf_declaration_specifier_visit(fd, depth,
 447                                         &node->u.ctf_expression.right,
 448                                         event->declaration_scope);
 449                         if (!declaration)
 450                                 return -EPERM;
 451                         if (declaration->type->id != CTF_TYPE_STRUCT)
 452                                 return -EPERM;
 453                         event->context_decl = container_of(declaration, struct declaration_struct, p);
 454                 } else if (!strcmp(left, "fields")) {
 455                         struct declaration *declaration;
 456
 457                         if (!event->definition_scope)
 458                                 return -EPERM;
 459                         declaration = ctf_declaration_specifier_visit(fd, depth,
 460                                         &node->u.ctf_expression.right,
 461                                         event->declaration_scope);
 462                         if (!declaration)
 463                                 return -EPERM;
 464                         if (declaration->type->id != CTF_TYPE_STRUCT)
 465                                 return -EPERM;
 466                         event->fields_decl = container_of(declaration, struct declaration_struct, p);
 467                 }
 468                 g_free(left);
 469                 break;
 470         }
 471         default:
 472                 return -EPERM;
 473         /* TODO: declaration specifier should be added. */
 474         }
 475
 476         return 0;
 477 }
 478
 479 static
 480 int ctf_event_visit(FILE *fd, int depth, struct ctf_node *node,
 481                     struct declaration_scope *parent_declaration_scope, struct ctf_trace *trace)
 482 {
 483         int ret = 0;
 484         struct ctf_node *iter;
 485         struct ctf_event *event;
 486         struct definition_scope *parent_def_scope;
 487
 488         event = g_new0(struct ctf_event, 1);
 489         event->declaration_scope = new_declaration_scope(parent_declaration_scope);
 490         cds_list_for_each_entry(iter, &node->u.event.declaration_list, siblings) {
 491                 ret = ctf_event_declaration_visit(fd, depth + 1, iter, event, trace);
 492                 if (ret)
 493                         goto error;
 494         }
 495         if (!CTF_EVENT_FIELD_IS_SET(event, name)) {
 496                 ret = -EPERM;
 497                 goto error;
 498         }
 499         if (!CTF_EVENT_FIELD_IS_SET(event, id)) {
 500                 ret = -EPERM;
 501                 goto error;
 502         }
 503         if (!CTF_EVENT_FIELD_IS_SET(event, stream_id)) {
 504                 ret = -EPERM;
 505                 goto error;
 506         }
 507         if (event->stream->events_by_id->len <= event->id)
 508                 g_ptr_array_set_size(event->stream->events_by_id, event->id + 1);
 509         g_ptr_array_index(event->stream->events_by_id, event->id) = event;
 510         g_hash_table_insert(event->stream->event_quark_to_id,
 511                             (gpointer)(unsigned long) event->name,
 512                             &event->id);
 513         parent_def_scope = stream->definition_scope;
 514         if (event->context_decl) {
 515                 event->context =
 516                         event->context_decl->definition_new(event->context_decl,
 517                                 parent_def_scope, 0, 0);
 518                 set_dynamic_definition_scope(&event->context->p,
 519                                              event->context->scope,
 520                                              "event.context");
 521                 parent_def_scope = event->context->scope;
 522                 declaration_unref(event->context_decl);
 523         }
 524         if (event->fields_decl) {
 525                 event->fields =
 526                         event->fields_decl->definition_new(event->fields_decl,
 527                                 parent_def_scope, 0, 0);
 528                 set_dynamic_definition_scope(&event->fields->p,
 529                                              event->fields->scope,
 530                                              "event.fields");
 531                 parent_def_scope = event->fields->scope;
 532                 declaration_unref(event->fields_decl);
 533         }
 534         return 0;
 535
 536 error:
 537         declaration_unref(event->fields_decl);
 538         declaration_unref(event->context_decl);
 539         free_definition_scope(event->definition_scope);
 540         free_declaration_scope(event->declaration_scope);
 541         g_free(event);
 542         return ret;
 543 }
 544
 545
 546 static
 547 int ctf_stream_declaration_visit(FILE *fd, int depth, struct ctf_node *node, struct ctf_stream *stream, struct ctf_trace *trace)
 548 {
 549         int ret = 0;
 550
 551         switch (node->type) {
 552         case NODE_TYPEDEF:
 553                 ret = ctf_typedef_visit(fd, depth + 1,
 554                                         &node->u._typedef.declaration_specifier,
 555                                         &node->u._typedef.type_declarators,
 556                                         stream->declaration_scope);
 557                 if (ret)
 558                         return ret;
 559                 break;
 560         case NODE_TYPEALIAS:
 561                 ret = ctf_typealias_visit(fd, depth + 1,
 562                                 &node->u.typealias.target, &node->u.typealias.alias
 563                                 stream->declaration_scope);
 564                 if (ret)
 565                         return ret;
 566                 break;
 567         case NODE_CTF_EXPRESSION:
 568         {
 569                 char *left;
 570
 571                 left = concatenate_unary_strings(&node->u.ctf_expression.left);
 572                 if (!strcmp(left, "stream_id")) {
 573                         if (CTF_EVENT_FIELD_IS_SET(event, stream_id))
 574                                 return -EPERM;
 575                         ret = get_unary_unsigned(&node->u.ctf_expression.right, &event->stream_id);
 576                         if (ret) {
 577                                 fprintf(stderr, "[error] %s: unexpected unary expression for event stream_id\n", __func__);
 578                                 return -EINVAL;
 579                         }
 580                         CTF_EVENT_SET_FIELD(event, stream_id);
 581                 } else if (!strcmp(left, "event.header")) {
 582                         struct declaration *declaration;
 583
 584                         declaration = ctf_declaration_specifier_visit(fd, depth,
 585                                         &node->u.ctf_expression.right,
 586                                         stream->declaration_scope, stream->definition_scope);
 587                         if (!declaration)
 588                                 return -EPERM;
 589                         if (declaration->type->id != CTF_TYPE_STRUCT)
 590                                 return -EPERM;
 591                         stream->event_header_decl = container_of(declaration, struct declaration_struct, p);
 592                 } else if (!strcmp(left, "event.context")) {
 593                         struct declaration *declaration;
 594
 595                         declaration = ctf_declaration_specifier_visit(fd, depth,
 596                                         &node->u.ctf_expression.right,
 597                                         stream->declaration_scope);
 598                         if (!declaration)
 599                                 return -EPERM;
 600                         if (declaration->type->id != CTF_TYPE_STRUCT)
 601                                 return -EPERM;
 602                         stream->event_context_decl = container_of(declaration, struct declaration_struct, p);
 603                 } else if (!strcmp(left, "packet.context")) {
 604                         struct declaration *declaration;
 605
 606                         declaration = ctf_declaration_specifier_visit(fd, depth,
 607                                         &node->u.ctf_expression.right,
 608                                         stream->declaration_scope);
 609                         if (!declaration)
 610                                 return -EPERM;
 611                         if (declaration->type->id != CTF_TYPE_STRUCT)
 612                                 return -EPERM;
 613                         stream->packet_context_decl = container_of(declaration, struct declaration_struct, p);
 614                 }
 615                 g_free(left);
 616                 break;
 617         }
 618         default:
 619                 return -EPERM;
 620         /* TODO: declaration specifier should be added. */
 621         }
 622
 623         return 0;
 624 }
 625
 626 static
 627 int ctf_stream_visit(FILE *fd, int depth, struct ctf_node *node,
 628                      struct declaration_scope *parent_declaration_scope, struct ctf_trace *trace)
 629 {
 630         int ret = 0;
 631         struct ctf_node *iter;
 632         struct ctf_stream *stream;
 633         struct definition_scope *parent_def_scope;
 634
 635         stream = g_new0(struct ctf_stream, 1);
 636         stream->declaration_scope = new_declaration_scope(parent_declaration_scope);
 637         stream->events_by_id = g_ptr_array_new();
 638         stream->event_quark_to_id = g_hash_table_new(g_int_hash, g_int_equal);
 639         cds_list_for_each_entry(iter, &node->u.stream.declaration_list, siblings) {
 640                 ret = ctf_stream_declaration_visit(fd, depth + 1, iter, stream, trace);
 641                 if (ret)
 642                         goto error;
 643         }
 644         if (!CTF_EVENT_FIELD_IS_SET(stream, stream_id)) {
 645                 ret = -EPERM;
 646                 goto error;
 647         }
 648         if (trace->streams->len <= stream->stream_id)
 649                 g_ptr_array_set_size(trace->streams, stream->stream_id + 1);
 650         g_ptr_array_index(trace->streams, stream->stream_id) = stream;
 651
 652         parent_def_scope = NULL;
 653         if (stream->packet_context_decl) {
 654                 stream->packet_context =
 655                         stream->packet_context_decl->definition_new(stream->packet_context_decl,
 656                                 parent_def_scope, 0, 0);
 657                 set_dynamic_definition_scope(&stream->packet_context->p,
 658                                              stream->packet_context->scope,
 659                                              "stream.packet.context");
 660                 parent_def_scope = stream->packet_context->scope;
 661                 declaration_unref(stream->packet_context_decl);
 662         }
 663         if (stream->event_header_decl) {
 664                 stream->event_header =
 665                         stream->event_header_decl->definition_new(stream->event_header_decl,
 666                                 parent_def_scope, 0, 0);
 667                 set_dynamic_definition_scope(&stream->event_header->p,
 668                                              stream->event_header->scope,
 669                                              "stream.event.header");
 670                 parent_def_scope = stream->event_header->scope;
 671                 declaration_unref(stream->event_header_decl);
 672         }
 673         if (stream->event_context_decl) {
 674                 stream->event_context =
 675                         stream->event_context_decl->definition_new(stream->event_context_decl,
 676                                 parent_def_scope, 0, 0);
 677                 set_dynamic_definition_scope(&stream->event_context->p,
 678                                              stream->event_context->scope,
 679                                              "stream.event.context");
 680                 parent_def_scope = stream->event_context->scope;
 681                 declaration_unref(stream->event_context_decl);
 682         }
 683         stream->definition_scope = parent_def_scope;
 684
 685         return 0;
 686
 687 error:
 688         declaration_unref(stream->event_header);
 689         declaration_unref(stream->event_context);
 690         declaration_unref(stream->packet_context);
 691         g_ptr_array_free(stream->events_by_id, TRUE);
 692         g_hash_table_free(stream->event_quark_to_id);
 693         free_definition_scope(stream->definition_scope);
 694         free_declaration_scope(stream->declaration_scope);
 695         g_free(stream);
 696         return ret;
 697 }
 698
 699 static
 700 int ctf_trace_declaration_visit(FILE *fd, int depth, struct ctf_node *node, struct ctf_trace *trace)
 701 {
 702         int ret = 0;
 703
 704         switch (node->type) {
 705         case NODE_TYPEDEF:
 706                 ret = ctf_typedef_visit(fd, depth + 1,
 707                                         &node->u._typedef.declaration_specifier,
 708                                         &node->u._typedef.type_declarators,
 709                                         trace->declaration_scope);
 710                 if (ret)
 711                         return ret;
 712                 break;
 713         case NODE_TYPEALIAS:
 714                 ret = ctf_typealias_visit(fd, depth + 1,
 715                                 &node->u.typealias.target, &node->u.typealias.alias
 716                                 trace->declaration_scope);
 717                 if (ret)
 718                         return ret;
 719                 break;
 720         case NODE_CTF_EXPRESSION:
 721         {
 722                 char *left;
 723
 724                 left = concatenate_unary_strings(&node->u.ctf_expression.left);
 725                 if (!strcmp(left, "major")) {
 726                         if (CTF_EVENT_FIELD_IS_SET(trace, major))
 727                                 return -EPERM;
 728                         ret = get_unary_unsigned(&node->u.ctf_expression.right, &trace->major);
 729                         if (ret) {
 730                                 fprintf(stderr, "[error] %s: unexpected unary expression for trace major number\n", __func__);
 731                                 return -EINVAL;
 732                         }
 733                         CTF_EVENT_SET_FIELD(trace, major);
 734                 } else if (!strcmp(left, "minor")) {
 735                         if (CTF_EVENT_FIELD_IS_SET(trace, minor))
 736                                 return -EPERM;
 737                         ret = get_unary_unsigned(&node->u.ctf_expression.right, &trace->minor);
 738                         if (ret) {
 739                                 fprintf(stderr, "[error] %s: unexpected unary expression for trace minor number\n", __func__);
 740                                 return -EINVAL;
 741                         }
 742                         CTF_EVENT_SET_FIELD(trace, minor);
 743                 } else if (!strcmp(left, "word_size")) {
 744                         if (CTF_EVENT_FIELD_IS_SET(trace, word_size))
 745                                 return -EPERM;
 746                         ret = get_unary_unsigned(&node->u.ctf_expression.right, &trace->word_size);
 747                         if (ret) {
 748                                 fprintf(stderr, "[error] %s: unexpected unary expression for trace word_size\n", __func__);
 749                                 return -EINVAL;
 750                         }
 751                         CTF_EVENT_SET_FIELD(trace, word_size);
 752                 } else if (!strcmp(left, "uuid")) {
 753                         if (CTF_EVENT_FIELD_IS_SET(trace, uuid))
 754                                 return -EPERM;
 755                         ret = get_unary_uuid(&node->u.ctf_expression.right, &trace->uuid);
 756                         if (ret) {
 757                                 fprintf(stderr, "[error] %s: unexpected unary expression for trace uuid\n", __func__);
 758                                 return -EINVAL;
 759                         }
 760                         CTF_EVENT_SET_FIELD(trace, uuid);
 761                 }
 762                 g_free(left);
 763                 break;
 764         }
 765         default:
 766                 return -EPERM;
 767         /* TODO: declaration specifier should be added. */
 768         }
 769
 770         return 0;
 771 }
 772
 773
 774 static
 775 int ctf_trace_visit(FILE *fd, int depth, struct ctf_node *node, struct ctf_trace *trace)
 776 {
 777         int ret = 0;
 778         struct ctf_node *iter;
 779
 780         if (trace->declaration_scope)
 781                 return -EEXIST;
 782         trace->declaration_scope = new_declaration_scope(trace->root_declaration_scope);
 783         trace->definition_scope = new_dynamic_definition_scope(trace->root_definition_scope);
 784         trace->streams = g_ptr_array_new();
 785         cds_list_for_each_entry(iter, &node->u.trace.declaration_list, siblings) {
 786                 ret = ctf_trace_declaration_visit(fd, depth + 1, iter, trace);
 787                 if (ret)
 788                         goto error;
 789         }
 790         if (!CTF_EVENT_FIELD_IS_SET(trace, major)) {
 791                 ret = -EPERM;
 792                 goto error;
 793         }
 794         if (!CTF_EVENT_FIELD_IS_SET(trace, minor)) {
 795                 ret = -EPERM;
 796                 goto error;
 797         }
 798         if (!CTF_EVENT_FIELD_IS_SET(trace, uuid)) {
 799                 ret = -EPERM;
 800                 goto error;
 801         }
 802         if (!CTF_EVENT_FIELD_IS_SET(trace, word_size)) {
 803                 ret = -EPERM;
 804                 goto error;
 805         }
 806         return 0;
 807
 808 error:
 809         g_ptr_array_free(trace->streams, TRUE);
 810         free_definition_scope(stream->definition_scope);
 811         free_declaration_scope(stream->declaration_scope);
 812         return ret;
 813 }
 814
 815 int _ctf_visitor(FILE *fd, int depth, struct ctf_node *node, struct ctf_trace *trace)
 816 {
 817         int ret = 0;
 818         struct ctf_node *iter;
 819
 820         switch (node->type) {
 821         case NODE_ROOT:
 822                 cds_list_for_each_entry(iter, &node->u.root._typedef,
 823                                         siblings) {
 824                         ret = ctf_typedef_visit(fd, depth + 1,
 825                                                 &iter->u._typedef.declaration_specifier,
 826                                                 &iter->u._typedef.type_declarators,
 827                                                 trace->declaration_scope);
 828                         if (ret)
 829                                 return ret;
 830                 }
 831                 cds_list_for_each_entry(iter, &node->u.root.typealias,
 832                                         siblings) {
 833                         ret = ctf_typealias_visit(fd, depth + 1,
 834                                         &iter->u.typealias.target, &iter->u.typealias.alias
 835                                         trace->declaration_scope);
 836                         if (ret)
 837                                 return ret;
 838                 }
 839                 cds_list_for_each_entry(iter, &node->u.root.declaration_specifier, siblings) {
 840                         ret = ctf_declaration_specifier_visit(fd, depth, iter,
 841                                         trace->root_declaration_scope);
 842                         if (ret)
 843                                 return ret;
 844                 }
 845                 cds_list_for_each_entry(iter, &node->u.root.trace, siblings) {
 846                         ret = ctf_trace_visit(fd, depth + 1, iter, trace);
 847                         if (ret)
 848                                 return ret;
 849                 }
 850                 cds_list_for_each_entry(iter, &node->u.root.stream, siblings) {
 851                         ret = ctf_stream_visit(fd, depth + 1, iter,
 852                                                trace->root_declaration_scope, trace);
 853                         if (ret)
 854                                 return ret;
 855                 }
 856                 cds_list_for_each_entry(iter, &node->u.root.event, siblings) {
 857                         ret = ctf_event_visit(fd, depth + 1, iter,
 858                                               trace->root_declaration_scope, trace);
 859                         if (ret)
 860                                 return ret;
 861                 }
 862                 break;
 863
 864         case NODE_TYPEALIAS_TARGET:
 865                 print_tabs(fd, depth);
 866                 fprintf(fd, "<target>\n");
 867                 depth++;
 868
 869                 print_tabs(fd, depth);
 870                 fprintf(fd, "<declaration_specifier>\n");
 871                 cds_list_for_each_entry(iter, &node->u.typealias_target.declaration_specifier, siblings) {
 872                         ret = ctf_visitor_print_xml(fd, depth + 1, iter);
 873                         if (ret)
 874                                 return ret;
 875                 }
 876                 print_tabs(fd, depth);
 877                 fprintf(fd, "</declaration_specifier>\n");
 878
 879                 print_tabs(fd, depth);
 880                 fprintf(fd, "<type_declarators>\n");
 881                 cds_list_for_each_entry(iter, &node->u.typealias_target.type_declarators, siblings) {
 882                         ret = ctf_visitor_print_xml(fd, depth + 1, iter);
 883                         if (ret)
 884                                 return ret;
 885                 }
 886                 print_tabs(fd, depth);
 887                 fprintf(fd, "</type_declarators>\n");
 888
 889                 depth--;
 890                 print_tabs(fd, depth);
 891                 fprintf(fd, "</target>\n");
 892                 break;
 893         case NODE_TYPEALIAS_ALIAS:
 894                 print_tabs(fd, depth);
 895                 fprintf(fd, "<alias>\n");
 896                 depth++;
 897
 898                 print_tabs(fd, depth);
 899                 fprintf(fd, "<declaration_specifier>\n");
 900                 cds_list_for_each_entry(iter, &node->u.typealias_alias.declaration_specifier, siblings) {
 901                         ret = ctf_visitor_print_xml(fd, depth + 1, iter);
 902                         if (ret)
 903                                 return ret;
 904                 }
 905                 print_tabs(fd, depth);
 906                 fprintf(fd, "</declaration_specifier>\n");
 907
 908                 print_tabs(fd, depth);
 909                 fprintf(fd, "<type_declarators>\n");
 910                 cds_list_for_each_entry(iter, &node->u.typealias_alias.type_declarators, siblings) {
 911                         ret = ctf_visitor_print_xml(fd, depth + 1, iter);
 912                         if (ret)
 913                                 return ret;
 914                 }
 915                 print_tabs(fd, depth);
 916                 fprintf(fd, "</type_declarators>\n");
 917
 918                 depth--;
 919                 print_tabs(fd, depth);
 920                 fprintf(fd, "</alias>\n");
 921                 break;
 922         case NODE_TYPEALIAS:
 923                 print_tabs(fd, depth);
 924                 fprintf(fd, "<typealias>\n");
 925                 ret = ctf_visitor_print_xml(fd, depth + 1, node->u.typealias.target);
 926                 if (ret)
 927                         return ret;
 928                 ret = ctf_visitor_print_xml(fd, depth + 1, node->u.typealias.alias);
 929                 if (ret)
 930                         return ret;
 931                 print_tabs(fd, depth);
 932                 fprintf(fd, "</typealias>\n");
 933                 break;
 934
 935         case NODE_TYPE_SPECIFIER:
 936                 ret = ctf_visitor_print_type_specifier(fd, depth, node);
 937                 if (ret)
 938                         return ret;
 939                 break;
 940         case NODE_POINTER:
 941                 print_tabs(fd, depth);
 942                 if (node->u.pointer.const_qualifier)
 943                         fprintf(fd, "<const_pointer />\n");
 944                 else
 945                         fprintf(fd, "<pointer />\n");
 946                 break;
 947         case NODE_TYPE_DECLARATOR:
 948                 ret = ctf_visitor_print_type_declarator(fd, depth, node);
 949                 if (ret)
 950                         return ret;
 951                 break;
 952
 953         case NODE_FLOATING_POINT:
 954                 print_tabs(fd, depth);
 955                 fprintf(fd, "<floating_point>\n");
 956                 cds_list_for_each_entry(iter, &node->u.floating_point.expressions, siblings) {
 957                         ret = ctf_visitor_print_xml(fd, depth + 1, iter);
 958                         if (ret)
 959                                 return ret;
 960                 }
 961                 print_tabs(fd, depth);
 962                 fprintf(fd, "</floating_point>\n");
 963                 break;
 964         case NODE_INTEGER:
 965                 print_tabs(fd, depth);
 966                 fprintf(fd, "<integer>\n");
 967                 cds_list_for_each_entry(iter, &node->u.integer.expressions, siblings) {
 968                         ret = ctf_visitor_print_xml(fd, depth + 1, iter);
 969                         if (ret)
 970                                 return ret;
 971                 }
 972                 print_tabs(fd, depth);
 973                 fprintf(fd, "</integer>\n");
 974                 break;
 975         case NODE_STRING:
 976                 print_tabs(fd, depth);
 977                 fprintf(fd, "<string>\n");
 978                 cds_list_for_each_entry(iter, &node->u.string.expressions, siblings) {
 979                         ret = ctf_visitor_print_xml(fd, depth + 1, iter);
 980                         if (ret)
 981                                 return ret;
 982                 }
 983                 print_tabs(fd, depth);
 984                 fprintf(fd, "</string>\n");
 985                 break;
 986         case NODE_ENUMERATOR:
 987                 print_tabs(fd, depth);
 988                 fprintf(fd, "<enumerator");
 989                 if (node->u.enumerator.id)
 990                         fprintf(fd, " id=\"%s\"", node->u.enumerator.id);
 991                 fprintf(fd, ">\n");
 992                 cds_list_for_each_entry(iter, &node->u.enumerator.values, siblings) {
 993                         ret = ctf_visitor_print_xml(fd, depth + 1, iter);
 994                         if (ret)
 995                                 return ret;
 996                 }
 997                 print_tabs(fd, depth);
 998                 fprintf(fd, "</enumerator>\n");
 999                 break;
1000         case NODE_ENUM:
1001                 print_tabs(fd, depth);
1002                 if (node->u._struct.name)
1003                         fprintf(fd, "<enum name=\"%s\">\n",
1004                                 node->u._enum.enum_id);
1005                 else
1006                         fprintf(fd, "<enum >\n");
1007                 depth++;
1008
1009                 if (node->u._enum.container_type) {
1010                         print_tabs(fd, depth);
1011                         fprintf(fd, "<container_type>\n");
1012                         ret = ctf_visitor_print_xml(fd, depth + 1, node->u._enum.container_type);
1013                         if (ret)
1014                                 return ret;
1015                         print_tabs(fd, depth);
1016                         fprintf(fd, "</container_type>\n");
1017                 }
1018
1019                 print_tabs(fd, depth);
1020                 fprintf(fd, "<enumerator_list>\n");
1021                 cds_list_for_each_entry(iter, &node->u._enum.enumerator_list, siblings) {
1022                         ret = ctf_visitor_print_xml(fd, depth + 1, iter);
1023                         if (ret)
1024                                 return ret;
1025                 }
1026                 print_tabs(fd, depth);
1027                 fprintf(fd, "</enumerator_list>\n");
1028
1029                 depth--;
1030                 print_tabs(fd, depth);
1031                 fprintf(fd, "</enum>\n");
1032                 break;
1033         case NODE_STRUCT_OR_VARIANT_DECLARATION:
1034                 print_tabs(fd, depth);
1035                 fprintf(fd, "<declaration_specifier>\n");
1036                 cds_list_for_each_entry(iter, &node->u.struct_or_variant_declaration.declaration_specifier, siblings) {
1037                         ret = ctf_visitor_print_xml(fd, depth + 1, iter);
1038                         if (ret)
1039                                 return ret;
1040                 }
1041                 print_tabs(fd, depth);
1042                 fprintf(fd, "</declaration_specifier>\n");
1043
1044                 print_tabs(fd, depth);
1045                 fprintf(fd, "<type_declarators>\n");
1046                 cds_list_for_each_entry(iter, &node->u.struct_or_variant_declaration.type_declarators, siblings) {
1047                         ret = ctf_visitor_print_xml(fd, depth + 1, iter);
1048                         if (ret)
1049                                 return ret;
1050                 }
1051                 print_tabs(fd, depth);
1052                 fprintf(fd, "</type_declarators>\n");
1053                 break;
1054         case NODE_VARIANT:
1055                 print_tabs(fd, depth);
1056                 fprintf(fd, "<variant");
1057                 if (node->u.variant.name)
1058                         fprintf(fd, " name=\"%s\"", node->u.variant.name);
1059                 if (node->u.variant.choice)
1060                         fprintf(fd, " choice=\"%s\"", node->u.variant.choice);
1061                 fprintf(fd, ">\n");
1062                 cds_list_for_each_entry(iter, &node->u.variant.declaration_list, siblings) {
1063                         ret = ctf_visitor_print_xml(fd, depth + 1, iter);
1064                         if (ret)
1065                                 return ret;
1066                 }
1067                 print_tabs(fd, depth);
1068                 fprintf(fd, "</variant>\n");
1069                 break;
1070         case NODE_STRUCT:
1071                 print_tabs(fd, depth);
1072                 if (node->u._struct.name)
1073                         fprintf(fd, "<struct name=\"%s\">\n",
1074                                 node->u._struct.name);
1075                 else
1076                         fprintf(fd, "<struct>\n");
1077                 cds_list_for_each_entry(iter, &node->u._struct.declaration_list, siblings) {
1078                         ret = ctf_visitor_print_xml(fd, depth + 1, iter);
1079                         if (ret)
1080                                 return ret;
1081                 }
1082                 print_tabs(fd, depth);
1083                 fprintf(fd, "</struct>\n");
1084                 break;
1085
1086         case NODE_UNKNOWN:
1087         default:
1088                 fprintf(stderr, "[error] %s: unknown node type %d\n", __func__,
1089                         (int) node->type);
1090                 return -EINVAL;
1091         }
1092         return ret;
1093 }