libcc1/plugin.cc

   1 /* Library interface to C front end
   2    Copyright (C) 2014-2016 Free Software Foundation, Inc.
   3
   4    This file is part of GCC.
   5
   6    GCC is free software; you can redistribute it and/or modify it under
   7    the terms of the GNU General Public License as published by the Free
   8    Software Foundation; either version 3, or (at your option) any later
   9    version.
  10
  11    GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12    WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14    for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with GCC; see the file COPYING3.  If not see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <cc1plugin-config.h>
  21
  22 #undef PACKAGE_NAME
  23 #undef PACKAGE_STRING
  24 #undef PACKAGE_TARNAME
  25 #undef PACKAGE_VERSION
  26
  27 #include "../gcc/config.h"
  28
  29 #undef PACKAGE_NAME
  30 #undef PACKAGE_STRING
  31 #undef PACKAGE_TARNAME
  32 #undef PACKAGE_VERSION
  33
  34 #include "gcc-plugin.h"
  35 #include "system.h"
  36 #include "coretypes.h"
  37 #include "stringpool.h"
  38
  39 #include "gcc-interface.h"
  40 #include "hash-set.h"
  41 #include "machmode.h"
  42 #include "vec.h"
  43 #include "double-int.h"
  44 #include "input.h"
  45 #include "alias.h"
  46 #include "symtab.h"
  47 #include "options.h"
  48 #include "wide-int.h"
  49 #include "inchash.h"
  50 #include "tree.h"
  51 #include "fold-const.h"
  52 #include "stor-layout.h"
  53 #include "c-tree.h"
  54 #include "toplev.h"
  55 #include "timevar.h"
  56 #include "hash-table.h"
  57 #include "tm.h"
  58 #include "c-family/c-pragma.h"
  59 #include "c-lang.h"
  60 #include "diagnostic.h"
  61 #include "langhooks.h"
  62 #include "langhooks-def.h"
  63
  64 #include "callbacks.hh"
  65 #include "connection.hh"
  66 #include "rpc.hh"
  67
  68 #ifdef __GNUC__
  69 #pragma GCC visibility push(default)
  70 #endif
  71 int plugin_is_GPL_compatible;
  72 #ifdef __GNUC__
  73 #pragma GCC visibility pop
  74 #endif
  75
  76 \f
  77
  78 // This is put into the lang hooks when the plugin starts.
  79
  80 static void
  81 plugin_print_error_function (diagnostic_context *context, const char *file,
  82                              diagnostic_info *diagnostic)
  83 {
  84   if (current_function_decl != NULL_TREE
  85       && DECL_NAME (current_function_decl) != NULL_TREE
  86       && strcmp (IDENTIFIER_POINTER (DECL_NAME (current_function_decl)),
  87                  GCC_FE_WRAPPER_FUNCTION) == 0)
  88     return;
  89   lhd_print_error_function (context, file, diagnostic);
  90 }
  91
  92 \f
  93
  94 static unsigned long long
  95 convert_out (tree t)
  96 {
  97   return (unsigned long long) (uintptr_t) t;
  98 }
  99
 100 static tree
 101 convert_in (unsigned long long v)
 102 {
 103   return (tree) (uintptr_t) v;
 104 }
 105
 106 \f
 107
 108 struct decl_addr_value
 109 {
 110   tree decl;
 111   tree address;
 112 };
 113
 114 struct decl_addr_hasher : free_ptr_hash<decl_addr_value>
 115 {
 116   static inline hashval_t hash (const decl_addr_value *);
 117   static inline bool equal (const decl_addr_value *, const decl_addr_value *);
 118 };
 119
 120 inline hashval_t
 121 decl_addr_hasher::hash (const decl_addr_value *e)
 122 {
 123   return IDENTIFIER_HASH_VALUE (DECL_NAME (e->decl));
 124 }
 125
 126 inline bool
 127 decl_addr_hasher::equal (const decl_addr_value *p1, const decl_addr_value *p2)
 128 {
 129   return p1->decl == p2->decl;
 130 }
 131
 132 \f
 133
 134 struct string_hasher : nofree_ptr_hash<const char>
 135 {
 136   static inline hashval_t hash (const char *s)
 137   {
 138     return htab_hash_string (s);
 139   }
 140
 141   static inline bool equal (const char *p1, const char *p2)
 142   {
 143     return strcmp (p1, p2) == 0;
 144   }
 145 };
 146
 147 \f
 148
 149 // A wrapper for pushdecl that doesn't let gdb have a chance to
 150 // instantiate a symbol.
 151
 152 static void
 153 pushdecl_safe (tree decl)
 154 {
 155   void (*save) (enum c_oracle_request, tree identifier);
 156
 157   save = c_binding_oracle;
 158   c_binding_oracle = NULL;
 159   pushdecl (decl);
 160   c_binding_oracle = save;
 161 }
 162
 163 \f
 164
 165 struct plugin_context : public cc1_plugin::connection
 166 {
 167   plugin_context (int fd);
 168
 169   // Map decls to addresses.
 170   hash_table<decl_addr_hasher> address_map;
 171
 172   // A collection of trees that are preserved for the GC.
 173   hash_table< nofree_ptr_hash<tree_node> > preserved;
 174
 175   // File name cache.
 176   hash_table<string_hasher> file_names;
 177
 178   // Perform GC marking.
 179   void mark ();
 180
 181   // Preserve a tree during the plugin's operation.
 182   tree preserve (tree t)
 183   {
 184     tree_node **slot = preserved.find_slot (t, INSERT);
 185     *slot = t;
 186     return t;
 187   }
 188
 189   source_location get_source_location (const char *filename,
 190                                        unsigned int line_number)
 191   {
 192     if (filename == NULL)
 193       return UNKNOWN_LOCATION;
 194
 195     filename = intern_filename (filename);
 196     linemap_add (line_table, LC_ENTER, false, filename, line_number);
 197     source_location loc = linemap_line_start (line_table, line_number, 0);
 198     linemap_add (line_table, LC_LEAVE, false, NULL, 0);
 199     return loc;
 200   }
 201
 202 private:
 203
 204   // Add a file name to FILE_NAMES and return the canonical copy.
 205   const char *intern_filename (const char *filename)
 206   {
 207     const char **slot = file_names.find_slot (filename, INSERT);
 208     if (*slot == NULL)
 209       {
 210         /* The file name must live as long as the line map, which
 211            effectively means as long as this compilation.  So, we copy
 212            the string here but never free it.  */
 213         *slot = xstrdup (filename);
 214       }
 215     return *slot;
 216   }
 217 };
 218
 219 static plugin_context *current_context;
 220
 221 \f
 222
 223 plugin_context::plugin_context (int fd)
 224   : cc1_plugin::connection (fd),
 225     address_map (30),
 226     preserved (30),
 227     file_names (30)
 228 {
 229 }
 230
 231 void
 232 plugin_context::mark ()
 233 {
 234   for (hash_table<decl_addr_hasher>::iterator it = address_map.begin ();
 235        it != address_map.end ();
 236        ++it)
 237     {
 238       ggc_mark ((*it)->decl);
 239       ggc_mark ((*it)->address);
 240     }
 241
 242   for (hash_table< nofree_ptr_hash<tree_node> >::iterator
 243          it = preserved.begin (); it != preserved.end (); ++it)
 244     ggc_mark (&*it);
 245 }
 246
 247 static void
 248 plugin_binding_oracle (enum c_oracle_request kind, tree identifier)
 249 {
 250   enum gcc_c_oracle_request request;
 251
 252   gcc_assert (current_context != NULL);
 253
 254   switch (kind)
 255     {
 256     case C_ORACLE_SYMBOL:
 257       request = GCC_C_ORACLE_SYMBOL;
 258       break;
 259     case C_ORACLE_TAG:
 260       request = GCC_C_ORACLE_TAG;
 261       break;
 262     case C_ORACLE_LABEL:
 263       request = GCC_C_ORACLE_LABEL;
 264       break;
 265     default:
 266       abort ();
 267     }
 268
 269   int ignore;
 270   cc1_plugin::call (current_context, "binding_oracle", &ignore,
 271                     request, IDENTIFIER_POINTER (identifier));
 272 }
 273
 274 static void
 275 plugin_pragma_user_expression (cpp_reader *)
 276 {
 277   c_binding_oracle = plugin_binding_oracle;
 278 }
 279
 280 static void
 281 plugin_init_extra_pragmas (void *, void *)
 282 {
 283   c_register_pragma ("GCC", "user_expression", plugin_pragma_user_expression);
 284 }
 285
 286 \f
 287
 288 // Maybe rewrite a decl to its address.
 289 static tree
 290 address_rewriter (tree *in, int *walk_subtrees, void *arg)
 291 {
 292   plugin_context *ctx = (plugin_context *) arg;
 293
 294   if (!DECL_P (*in) || DECL_NAME (*in) == NULL_TREE)
 295     return NULL_TREE;
 296
 297   decl_addr_value value;
 298   value.decl = *in;
 299   decl_addr_value *found_value = ctx->address_map.find (&value);
 300   if (found_value != NULL)
 301     {
 302       // At this point we don't need VLA sizes for gdb-supplied
 303       // variables, and having them here confuses later passes, so we
 304       // drop them.
 305       if (C_TYPE_VARIABLE_SIZE (TREE_TYPE (*in)))
 306         {
 307           TREE_TYPE (*in)
 308             = build_array_type_nelts (TREE_TYPE (TREE_TYPE (*in)), 1);
 309           DECL_SIZE (*in) = TYPE_SIZE (TREE_TYPE (*in));
 310           DECL_SIZE_UNIT (*in) = TYPE_SIZE_UNIT (TREE_TYPE (*in));
 311         }
 312     }
 313   else if (DECL_IS_BUILTIN (*in))
 314     {
 315       gcc_address address;
 316
 317       if (!cc1_plugin::call (ctx, "address_oracle", &address,
 318                              IDENTIFIER_POINTER (DECL_NAME (*in))))
 319         return NULL_TREE;
 320       if (address == 0)
 321         return NULL_TREE;
 322
 323       // Insert the decl into the address map in case it is referenced
 324       // again.
 325       value.address = build_int_cst_type (ptr_type_node, address);
 326       decl_addr_value **slot = ctx->address_map.find_slot (&value, INSERT);
 327       gcc_assert (*slot == NULL);
 328       *slot
 329         = static_cast<decl_addr_value *> (xmalloc (sizeof (decl_addr_value)));
 330       **slot = value;
 331       found_value = *slot;
 332     }
 333   else
 334     return NULL_TREE;
 335
 336   if (found_value->address != error_mark_node)
 337     {
 338       // We have an address for the decl, so rewrite the tree.
 339       tree ptr_type = build_pointer_type (TREE_TYPE (*in));
 340       *in = fold_build1 (INDIRECT_REF, TREE_TYPE (*in),
 341                          fold_build1 (CONVERT_EXPR, ptr_type,
 342                                       found_value->address));
 343     }
 344
 345   *walk_subtrees = 0;
 346
 347   return NULL_TREE;
 348 }
 349
 350 // When generating code for gdb, we want to be able to use absolute
 351 // addresses to refer to otherwise external objects that gdb knows
 352 // about.  gdb passes in these addresses when building decls, and then
 353 // before gimplification we go through the trees, rewriting uses to
 354 // the equivalent of "*(TYPE *) ADDR".
 355 static void
 356 rewrite_decls_to_addresses (void *function_in, void *)
 357 {
 358   tree function = (tree) function_in;
 359
 360   // Do nothing if we're not in gdb.
 361   if (current_context == NULL)
 362     return;
 363
 364   walk_tree (&DECL_SAVED_TREE (function), address_rewriter, current_context,
 365              NULL);
 366 }
 367
 368 \f
 369
 370 gcc_decl
 371 plugin_build_decl (cc1_plugin::connection *self,
 372                    const char *name,
 373                    enum gcc_c_symbol_kind sym_kind,
 374                    gcc_type sym_type_in,
 375                    const char *substitution_name,
 376                    gcc_address address,
 377                    const char *filename,
 378                    unsigned int line_number)
 379 {
 380   plugin_context *ctx = static_cast<plugin_context *> (self);
 381   tree identifier = get_identifier (name);
 382   enum tree_code code;
 383   tree decl;
 384   tree sym_type = convert_in (sym_type_in);
 385
 386   switch (sym_kind)
 387     {
 388     case GCC_C_SYMBOL_FUNCTION:
 389       code = FUNCTION_DECL;
 390       break;
 391
 392     case GCC_C_SYMBOL_VARIABLE:
 393       code = VAR_DECL;
 394       break;
 395
 396     case GCC_C_SYMBOL_TYPEDEF:
 397       code = TYPE_DECL;
 398       break;
 399
 400     case GCC_C_SYMBOL_LABEL:
 401       // FIXME: we aren't ready to handle labels yet.
 402       // It isn't clear how to translate them properly
 403       // and in any case a "goto" isn't likely to work.
 404       return convert_out (error_mark_node);
 405
 406     default:
 407       abort ();
 408     }
 409
 410   source_location loc = ctx->get_source_location (filename, line_number);
 411
 412   decl = build_decl (loc, code, identifier, sym_type);
 413   TREE_USED (decl) = 1;
 414   TREE_ADDRESSABLE (decl) = 1;
 415
 416   if (sym_kind != GCC_C_SYMBOL_TYPEDEF)
 417     {
 418       decl_addr_value value;
 419
 420       value.decl = decl;
 421       if (substitution_name != NULL)
 422         {
 423           // If the translator gave us a name without a binding,
 424           // we can just substitute error_mark_node, since we know the
 425           // translator will be reporting an error anyhow.
 426           value.address
 427             = lookup_name (get_identifier (substitution_name));
 428           if (value.address == NULL_TREE)
 429             value.address = error_mark_node;
 430         }
 431       else
 432         value.address = build_int_cst_type (ptr_type_node, address);
 433       decl_addr_value **slot = ctx->address_map.find_slot (&value, INSERT);
 434       gcc_assert (*slot == NULL);
 435       *slot
 436         = static_cast<decl_addr_value *> (xmalloc (sizeof (decl_addr_value)));
 437       **slot = value;
 438     }
 439
 440   return convert_out (ctx->preserve (decl));
 441 }
 442
 443 int
 444 plugin_bind (cc1_plugin::connection *,
 445              gcc_decl decl_in, int is_global)
 446 {
 447   tree decl = convert_in (decl_in);
 448   c_bind (DECL_SOURCE_LOCATION (decl), decl, is_global);
 449   rest_of_decl_compilation (decl, is_global, 0);
 450   return 1;
 451 }
 452
 453 int
 454 plugin_tagbind (cc1_plugin::connection *self,
 455                 const char *name, gcc_type tagged_type,
 456                 const char *filename, unsigned int line_number)
 457 {
 458   plugin_context *ctx = static_cast<plugin_context *> (self);
 459   c_pushtag (ctx->get_source_location (filename, line_number),
 460              get_identifier (name), convert_in (tagged_type));
 461   return 1;
 462 }
 463
 464 gcc_type
 465 plugin_build_pointer_type (cc1_plugin::connection *,
 466                            gcc_type base_type)
 467 {
 468   // No need to preserve a pointer type as the base type is preserved.
 469   return convert_out (build_pointer_type (convert_in (base_type)));
 470 }
 471
 472 gcc_type
 473 plugin_build_record_type (cc1_plugin::connection *self)
 474 {
 475   plugin_context *ctx = static_cast<plugin_context *> (self);
 476   return convert_out (ctx->preserve (make_node (RECORD_TYPE)));
 477 }
 478
 479 gcc_type
 480 plugin_build_union_type (cc1_plugin::connection *self)
 481 {
 482   plugin_context *ctx = static_cast<plugin_context *> (self);
 483   return convert_out (ctx->preserve (make_node (UNION_TYPE)));
 484 }
 485
 486 int
 487 plugin_build_add_field (cc1_plugin::connection *,
 488                         gcc_type record_or_union_type_in,
 489                         const char *field_name,
 490                         gcc_type field_type_in,
 491                         unsigned long bitsize,
 492                         unsigned long bitpos)
 493 {
 494   tree record_or_union_type = convert_in (record_or_union_type_in);
 495   tree field_type = convert_in (field_type_in);
 496
 497   gcc_assert (TREE_CODE (record_or_union_type) == RECORD_TYPE
 498               || TREE_CODE (record_or_union_type) == UNION_TYPE);
 499
 500   /* Note that gdb does not preserve the location of field decls, so
 501      we can't provide a decent location here.  */
 502   tree decl = build_decl (BUILTINS_LOCATION, FIELD_DECL,
 503                           get_identifier (field_name), field_type);
 504   DECL_FIELD_CONTEXT (decl) = record_or_union_type;
 505
 506   if (TREE_CODE (field_type) == INTEGER_TYPE
 507       && TYPE_PRECISION (field_type) != bitsize)
 508     {
 509       DECL_BIT_FIELD_TYPE (decl) = field_type;
 510       TREE_TYPE (decl)
 511         = c_build_bitfield_integer_type (bitsize, TYPE_UNSIGNED (field_type));
 512     }
 513
 514   DECL_MODE (decl) = TYPE_MODE (TREE_TYPE (decl));
 515
 516   // There's no way to recover this from DWARF.
 517   SET_DECL_OFFSET_ALIGN (decl, TYPE_PRECISION (pointer_sized_int_node));
 518
 519   tree pos = bitsize_int (bitpos);
 520   pos_from_bit (&DECL_FIELD_OFFSET (decl), &DECL_FIELD_BIT_OFFSET (decl),
 521                 DECL_OFFSET_ALIGN (decl), pos);
 522
 523   DECL_SIZE (decl) = bitsize_int (bitsize);
 524   DECL_SIZE_UNIT (decl) = size_int ((bitsize + BITS_PER_UNIT - 1)
 525                                     / BITS_PER_UNIT);
 526
 527   DECL_CHAIN (decl) = TYPE_FIELDS (record_or_union_type);
 528   TYPE_FIELDS (record_or_union_type) = decl;
 529
 530   return 1;
 531 }
 532
 533 int
 534 plugin_finish_record_or_union (cc1_plugin::connection *,
 535                                gcc_type record_or_union_type_in,
 536                                unsigned long size_in_bytes)
 537 {
 538   tree record_or_union_type = convert_in (record_or_union_type_in);
 539
 540   gcc_assert (TREE_CODE (record_or_union_type) == RECORD_TYPE
 541               || TREE_CODE (record_or_union_type) == UNION_TYPE);
 542
 543   /* We built the field list in reverse order, so fix it now.  */
 544   TYPE_FIELDS (record_or_union_type)
 545     = nreverse (TYPE_FIELDS (record_or_union_type));
 546
 547   if (TREE_CODE (record_or_union_type) == UNION_TYPE)
 548     {
 549       /* Unions can just be handled by the generic code.  */
 550       layout_type (record_or_union_type);
 551     }
 552   else
 553     {
 554       // FIXME there's no way to get this from DWARF,
 555       // or even, it seems, a particularly good way to deduce it.
 556       SET_TYPE_ALIGN (record_or_union_type,
 557                       TYPE_PRECISION (pointer_sized_int_node));
 558
 559       TYPE_SIZE (record_or_union_type) = bitsize_int (size_in_bytes
 560                                                       * BITS_PER_UNIT);
 561       TYPE_SIZE_UNIT (record_or_union_type) = size_int (size_in_bytes);
 562
 563       compute_record_mode (record_or_union_type);
 564       finish_bitfield_layout (record_or_union_type);
 565       // FIXME we have no idea about TYPE_PACKED
 566     }
 567
 568   return 1;
 569 }
 570
 571 gcc_type
 572 plugin_build_enum_type (cc1_plugin::connection *self,
 573                         gcc_type underlying_int_type_in)
 574 {
 575   tree underlying_int_type = convert_in (underlying_int_type_in);
 576
 577   if (underlying_int_type == error_mark_node)
 578     return convert_out (error_mark_node);
 579
 580   tree result = make_node (ENUMERAL_TYPE);
 581
 582   TYPE_PRECISION (result) = TYPE_PRECISION (underlying_int_type);
 583   TYPE_UNSIGNED (result) = TYPE_UNSIGNED (underlying_int_type);
 584
 585   plugin_context *ctx = static_cast<plugin_context *> (self);
 586   return convert_out (ctx->preserve (result));
 587 }
 588
 589 int
 590 plugin_build_add_enum_constant (cc1_plugin::connection *,
 591                                 gcc_type enum_type_in,
 592                                 const char *name,
 593                                 unsigned long value)
 594 {
 595   tree cst, decl, cons;
 596   tree enum_type = convert_in (enum_type_in);
 597
 598   gcc_assert (TREE_CODE (enum_type) == ENUMERAL_TYPE);
 599
 600   cst = build_int_cst (enum_type, value);
 601   /* Note that gdb does not preserve the location of enum constants,
 602      so we can't provide a decent location here.  */
 603   decl = build_decl (BUILTINS_LOCATION, CONST_DECL,
 604                      get_identifier (name), enum_type);
 605   DECL_INITIAL (decl) = cst;
 606   pushdecl_safe (decl);
 607
 608   cons = tree_cons (DECL_NAME (decl), cst, TYPE_VALUES (enum_type));
 609   TYPE_VALUES (enum_type) = cons;
 610
 611   return 1;
 612 }
 613
 614 int
 615 plugin_finish_enum_type (cc1_plugin::connection *,
 616                          gcc_type enum_type_in)
 617 {
 618   tree enum_type = convert_in (enum_type_in);
 619   tree minnode, maxnode, iter;
 620
 621   iter = TYPE_VALUES (enum_type);
 622   minnode = maxnode = TREE_VALUE (iter);
 623   for (iter = TREE_CHAIN (iter);
 624        iter != NULL_TREE;
 625        iter = TREE_CHAIN (iter))
 626     {
 627       tree value = TREE_VALUE (iter);
 628       if (tree_int_cst_lt (maxnode, value))
 629         maxnode = value;
 630       if (tree_int_cst_lt (value, minnode))
 631         minnode = value;
 632     }
 633   TYPE_MIN_VALUE (enum_type) = minnode;
 634   TYPE_MAX_VALUE (enum_type) = maxnode;
 635
 636   layout_type (enum_type);
 637
 638   return 1;
 639 }
 640
 641 gcc_type
 642 plugin_build_function_type (cc1_plugin::connection *self,
 643                             gcc_type return_type_in,
 644                             const struct gcc_type_array *argument_types_in,
 645                             int is_varargs)
 646 {
 647   tree *argument_types;
 648   tree return_type = convert_in (return_type_in);
 649   tree result;
 650
 651   argument_types = new tree[argument_types_in->n_elements];
 652   for (int i = 0; i < argument_types_in->n_elements; ++i)
 653     argument_types[i] = convert_in (argument_types_in->elements[i]);
 654
 655   if (is_varargs)
 656     result = build_varargs_function_type_array (return_type,
 657                                                 argument_types_in->n_elements,
 658                                                 argument_types);
 659   else
 660     result = build_function_type_array (return_type,
 661                                         argument_types_in->n_elements,
 662                                         argument_types);
 663
 664   delete[] argument_types;
 665
 666   plugin_context *ctx = static_cast<plugin_context *> (self);
 667   return convert_out (ctx->preserve (result));
 668 }
 669
 670 gcc_type
 671 plugin_int_type (cc1_plugin::connection *self,
 672                  int is_unsigned, unsigned long size_in_bytes)
 673 {
 674   tree result = c_common_type_for_size (BITS_PER_UNIT * size_in_bytes,
 675                                         is_unsigned);
 676   if (result == NULL_TREE)
 677     result = error_mark_node;
 678   else
 679     {
 680       plugin_context *ctx = static_cast<plugin_context *> (self);
 681       ctx->preserve (result);
 682     }
 683   return convert_out (result);
 684 }
 685
 686 gcc_type
 687 plugin_float_type (cc1_plugin::connection *,
 688                    unsigned long size_in_bytes)
 689 {
 690   if (BITS_PER_UNIT * size_in_bytes == TYPE_PRECISION (float_type_node))
 691     return convert_out (float_type_node);
 692   if (BITS_PER_UNIT * size_in_bytes == TYPE_PRECISION (double_type_node))
 693     return convert_out (double_type_node);
 694   if (BITS_PER_UNIT * size_in_bytes == TYPE_PRECISION (long_double_type_node))
 695     return convert_out (long_double_type_node);
 696   return convert_out (error_mark_node);
 697 }
 698
 699 gcc_type
 700 plugin_void_type (cc1_plugin::connection *)
 701 {
 702   return convert_out (void_type_node);
 703 }
 704
 705 gcc_type
 706 plugin_bool_type (cc1_plugin::connection *)
 707 {
 708   return convert_out (boolean_type_node);
 709 }
 710
 711 gcc_type
 712 plugin_build_array_type (cc1_plugin::connection *self,
 713                          gcc_type element_type_in, int num_elements)
 714 {
 715   tree element_type = convert_in (element_type_in);
 716   tree result;
 717
 718   if (num_elements == -1)
 719     result = build_array_type (element_type, NULL_TREE);
 720   else
 721     result = build_array_type_nelts (element_type, num_elements);
 722
 723   plugin_context *ctx = static_cast<plugin_context *> (self);
 724   return convert_out (ctx->preserve (result));
 725 }
 726
 727 gcc_type
 728 plugin_build_vla_array_type (cc1_plugin::connection *self,
 729                              gcc_type element_type_in,
 730                              const char *upper_bound_name)
 731 {
 732   tree element_type = convert_in (element_type_in);
 733   tree upper_bound = lookup_name (get_identifier (upper_bound_name));
 734   tree range = build_index_type (upper_bound);
 735
 736   tree result = build_array_type (element_type, range);
 737   C_TYPE_VARIABLE_SIZE (result) = 1;
 738
 739   plugin_context *ctx = static_cast<plugin_context *> (self);
 740   return convert_out (ctx->preserve (result));
 741 }
 742
 743 gcc_type
 744 plugin_build_qualified_type (cc1_plugin::connection *,
 745                              gcc_type unqualified_type_in,
 746                              enum gcc_qualifiers qualifiers)
 747 {
 748   tree unqualified_type = convert_in (unqualified_type_in);
 749   int quals = 0;
 750
 751   if ((qualifiers & GCC_QUALIFIER_CONST) != 0)
 752     quals |= TYPE_QUAL_CONST;
 753   if ((qualifiers & GCC_QUALIFIER_VOLATILE) != 0)
 754     quals |= TYPE_QUAL_VOLATILE;
 755   if ((qualifiers & GCC_QUALIFIER_RESTRICT) != 0)
 756     quals |= TYPE_QUAL_RESTRICT;
 757
 758   return convert_out (build_qualified_type (unqualified_type, quals));
 759 }
 760
 761 gcc_type
 762 plugin_build_complex_type (cc1_plugin::connection *self,
 763                            gcc_type base_type)
 764 {
 765   plugin_context *ctx = static_cast<plugin_context *> (self);
 766   return convert_out (ctx->preserve (build_complex_type (convert_in (base_type))));
 767 }
 768
 769 gcc_type
 770 plugin_build_vector_type (cc1_plugin::connection *self,
 771                           gcc_type base_type, int nunits)
 772 {
 773   plugin_context *ctx = static_cast<plugin_context *> (self);
 774   return convert_out (ctx->preserve (build_vector_type (convert_in (base_type),
 775                                                         nunits)));
 776 }
 777
 778 int
 779 plugin_build_constant (cc1_plugin::connection *self, gcc_type type_in,
 780                        const char *name, unsigned long value,
 781                        const char *filename, unsigned int line_number)
 782 {
 783   plugin_context *ctx = static_cast<plugin_context *> (self);
 784   tree cst, decl;
 785   tree type = convert_in (type_in);
 786
 787   cst = build_int_cst (type, value);
 788   decl = build_decl (ctx->get_source_location (filename, line_number),
 789                      CONST_DECL, get_identifier (name), type);
 790   DECL_INITIAL (decl) = cst;
 791   pushdecl_safe (decl);
 792
 793   return 1;
 794 }
 795
 796 gcc_type
 797 plugin_error (cc1_plugin::connection *,
 798               const char *message)
 799 {
 800   error ("%s", message);
 801   return convert_out (error_mark_node);
 802 }
 803
 804 \f
 805
 806 // Perform GC marking.
 807
 808 static void
 809 gc_mark (void *, void *)
 810 {
 811   if (current_context != NULL)
 812     current_context->mark ();
 813 }
 814
 815 #ifdef __GNUC__
 816 #pragma GCC visibility push(default)
 817 #endif
 818
 819 int
 820 plugin_init (struct plugin_name_args *plugin_info,
 821              struct plugin_gcc_version *)
 822 {
 823   long fd = -1;
 824   for (int i = 0; i < plugin_info->argc; ++i)
 825     {
 826       if (strcmp (plugin_info->argv[i].key, "fd") == 0)
 827         {
 828           char *tail;
 829           errno = 0;
 830           fd = strtol (plugin_info->argv[i].value, &tail, 0);
 831           if (*tail != '\0' || errno != 0)
 832             fatal_error (input_location,
 833                          "%s: invalid file descriptor argument to plugin",
 834                          plugin_info->base_name);
 835           break;
 836         }
 837     }
 838   if (fd == -1)
 839     fatal_error (input_location,
 840                  "%s: required plugin argument %<fd%> is missing",
 841                  plugin_info->base_name);
 842
 843   current_context = new plugin_context (fd);
 844
 845   // Handshake.
 846   cc1_plugin::protocol_int version;
 847   if (!current_context->require ('H')
 848       || ! ::cc1_plugin::unmarshall (current_context, &version))
 849     fatal_error (input_location,
 850                  "%s: handshake failed", plugin_info->base_name);
 851   if (version != GCC_C_FE_VERSION_0)
 852     fatal_error (input_location,
 853                  "%s: unknown version in handshake", plugin_info->base_name);
 854
 855   register_callback (plugin_info->base_name, PLUGIN_PRAGMAS,
 856                      plugin_init_extra_pragmas, NULL);
 857   register_callback (plugin_info->base_name, PLUGIN_PRE_GENERICIZE,
 858                      rewrite_decls_to_addresses, NULL);
 859   register_callback (plugin_info->base_name, PLUGIN_GGC_MARKING,
 860                      gc_mark, NULL);
 861
 862   lang_hooks.print_error_function = plugin_print_error_function;
 863
 864 #define GCC_METHOD0(R, N)                       \
 865   {                                             \
 866     cc1_plugin::callback_ftype *fun             \
 867       = cc1_plugin::callback<R, plugin_ ## N>;  \
 868     current_context->add_callback (# N, fun);   \
 869   }
 870 #define GCC_METHOD1(R, N, A)                            \
 871   {                                                     \
 872     cc1_plugin::callback_ftype *fun                     \
 873       = cc1_plugin::callback<R, A, plugin_ ## N>;       \
 874     current_context->add_callback (# N, fun);           \
 875   }
 876 #define GCC_METHOD2(R, N, A, B)                         \
 877   {                                                     \
 878     cc1_plugin::callback_ftype *fun                     \
 879       = cc1_plugin::callback<R, A, B, plugin_ ## N>;    \
 880     current_context->add_callback (# N, fun);           \
 881   }
 882 #define GCC_METHOD3(R, N, A, B, C)                      \
 883   {                                                     \
 884     cc1_plugin::callback_ftype *fun                     \
 885       = cc1_plugin::callback<R, A, B, C, plugin_ ## N>; \
 886     current_context->add_callback (# N, fun);           \
 887   }
 888 #define GCC_METHOD4(R, N, A, B, C, D)           \
 889   {                                             \
 890     cc1_plugin::callback_ftype *fun             \
 891       = cc1_plugin::callback<R, A, B, C, D,     \
 892                              plugin_ ## N>;     \
 893     current_context->add_callback (# N, fun);   \
 894   }
 895 #define GCC_METHOD5(R, N, A, B, C, D, E)        \
 896   {                                             \
 897     cc1_plugin::callback_ftype *fun             \
 898       = cc1_plugin::callback<R, A, B, C, D, E,  \
 899                              plugin_ ## N>;     \
 900     current_context->add_callback (# N, fun);   \
 901   }
 902 #define GCC_METHOD7(R, N, A, B, C, D, E, F, G)          \
 903   {                                                     \
 904     cc1_plugin::callback_ftype *fun                     \
 905       = cc1_plugin::callback<R, A, B, C, D, E, F, G,    \
 906                              plugin_ ## N>;             \
 907     current_context->add_callback (# N, fun);           \
 908   }
 909
 910 #include "gcc-c-fe.def"
 911
 912 #undef GCC_METHOD0
 913 #undef GCC_METHOD1
 914 #undef GCC_METHOD2
 915 #undef GCC_METHOD3
 916 #undef GCC_METHOD4
 917 #undef GCC_METHOD5
 918 #undef GCC_METHOD7
 919
 920   return 0;
 921 }