1 /* YACC parser for Ada expressions, for GDB.
2 Copyright (C) 1986-2016 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19 /* Parse an Ada expression from text in a string,
20 and return the result as a struct expression pointer.
21 That structure contains arithmetic operations in reverse polish,
22 with constants represented by operations that are followed by special data.
23 See expression.h for the details of the format.
24 What is important here is that it can be built up sequentially
25 during the process of parsing; the lower levels of the tree always
26 come first in the result.
28 malloc's and realloc's in this file are transformed to
29 xmalloc and xrealloc respectively by the same sed command in the
30 makefile that remaps any other malloc/realloc inserted by the parser
31 generator. Doing this with #defines and trying to control the interaction
32 with include files (<malloc.h> and <stdlib.h> for example) just became
33 too messy, particularly when such includes can be inserted at random
34 times by the parser generator. */
40 #include "expression.h"
42 #include "parser-defs.h"
45 #include "bfd.h" /* Required by objfiles.h. */
46 #include "symfile.h" /* Required by objfiles.h. */
47 #include "objfiles.h" /* For have_full_symbols and have_partial_symbols */
51 #define parse_type(ps) builtin_type (parse_gdbarch (ps))
53 /* Remap normal yacc parser interface names (yyparse, yylex, yyerror,
55 #define GDB_YY_REMAP_PREFIX ada_
60 struct minimal_symbol *msym;
61 const struct block *block;
65 /* The state of the parser, used internally when we are parsing the
68 static struct parser_state *pstate = NULL;
70 static struct stoken empty_stoken = { "", 0 };
72 /* If expression is in the context of TYPE'(...), then TYPE, else
74 static struct type *type_qualifier;
78 static int yylex (void);
80 void yyerror (char *);
82 static void write_int (struct parser_state *, LONGEST, struct type *);
84 static void write_object_renaming (struct parser_state *,
85 const struct block *, const char *, int,
88 static struct type* write_var_or_type (struct parser_state *,
89 const struct block *, struct stoken);
91 static void write_name_assoc (struct parser_state *, struct stoken);
93 static void write_exp_op_with_string (struct parser_state *, enum exp_opcode,
96 static const struct block *block_lookup (const struct block *, const char *);
98 static LONGEST convert_char_literal (struct type *, LONGEST);
100 static void write_ambiguous_var (struct parser_state *,
101 const struct block *, char *, int);
103 static struct type *type_int (struct parser_state *);
105 static struct type *type_long (struct parser_state *);
107 static struct type *type_long_long (struct parser_state *);
109 static struct type *type_float (struct parser_state *);
111 static struct type *type_double (struct parser_state *);
113 static struct type *type_long_double (struct parser_state *);
115 static struct type *type_char (struct parser_state *);
117 static struct type *type_boolean (struct parser_state *);
119 static struct type *type_system_address (struct parser_state *);
136 const struct block *bval;
137 struct internalvar *ivar;
140 %type <lval> positional_list component_groups component_associations
141 %type <lval> aggregate_component_list
142 %type <tval> var_or_type
144 %token <typed_val> INT NULL_PTR CHARLIT
145 %token <typed_val_float> FLOAT
146 %token TRUEKEYWORD FALSEKEYWORD
148 %token <sval> STRING NAME DOT_ID
150 %type <lval> arglist tick_arglist
152 %type <tval> save_qualifier
156 /* Special type cases, put in to allow the parser to distinguish different
158 %token <sval> SPECIAL_VARIABLE
161 %left _AND_ OR XOR THEN ELSE
162 %left '=' NOTEQUAL '<' '>' LEQ GEQ IN DOTDOT
166 %left '*' '/' MOD REM
167 %right STARSTAR ABS NOT
169 /* Artificial token to give NAME => ... and NAME | priority over reducing
170 NAME to <primary> and to give <primary>' priority over reducing <primary>
176 %right TICK_ACCESS TICK_ADDRESS TICK_FIRST TICK_LAST TICK_LENGTH
177 %right TICK_MAX TICK_MIN TICK_MODULUS
178 %right TICK_POS TICK_RANGE TICK_SIZE TICK_TAG TICK_VAL
179 /* The following are right-associative only so that reductions at this
180 precedence have lower precedence than '.' and '('. The syntax still
181 forces a.b.c, e.g., to be LEFT-associated. */
182 %right '.' '(' '[' DOT_ID DOT_ALL
192 /* Expressions, including the sequencing operator. */
195 { write_exp_elt_opcode (pstate, BINOP_COMMA); }
196 | primary ASSIGN exp /* Extension for convenience */
197 { write_exp_elt_opcode (pstate, BINOP_ASSIGN); }
200 /* Expressions, not including the sequencing operator. */
201 primary : primary DOT_ALL
202 { write_exp_elt_opcode (pstate, UNOP_IND); }
205 primary : primary DOT_ID
206 { write_exp_op_with_string (pstate, STRUCTOP_STRUCT,
210 primary : primary '(' arglist ')'
212 write_exp_elt_opcode (pstate, OP_FUNCALL);
213 write_exp_elt_longcst (pstate, $3);
214 write_exp_elt_opcode (pstate, OP_FUNCALL);
216 | var_or_type '(' arglist ')'
221 error (_("Invalid conversion"));
222 write_exp_elt_opcode (pstate, UNOP_CAST);
223 write_exp_elt_type (pstate, $1);
224 write_exp_elt_opcode (pstate, UNOP_CAST);
228 write_exp_elt_opcode (pstate, OP_FUNCALL);
229 write_exp_elt_longcst (pstate, $3);
230 write_exp_elt_opcode (pstate, OP_FUNCALL);
235 primary : var_or_type '\'' save_qualifier { type_qualifier = $1; }
239 error (_("Type required for qualification"));
240 write_exp_elt_opcode (pstate, UNOP_QUAL);
241 write_exp_elt_type (pstate, $1);
242 write_exp_elt_opcode (pstate, UNOP_QUAL);
247 save_qualifier : { $$ = type_qualifier; }
251 primary '(' simple_exp DOTDOT simple_exp ')'
252 { write_exp_elt_opcode (pstate, TERNOP_SLICE); }
253 | var_or_type '(' simple_exp DOTDOT simple_exp ')'
255 write_exp_elt_opcode (pstate, TERNOP_SLICE);
257 error (_("Cannot slice a type"));
261 primary : '(' exp1 ')' { }
264 /* The following rule causes a conflict with the type conversion
266 To get around it, we give '(' higher priority and add bridge rules for
267 var_or_type (exp, exp, ...)
268 var_or_type (exp .. exp)
269 We also have the action for var_or_type(exp) generate a function call
270 when the first symbol does not denote a type. */
272 primary : var_or_type %prec VAR
275 write_exp_elt_opcode (pstate, OP_TYPE);
276 write_exp_elt_type (pstate, $1);
277 write_exp_elt_opcode (pstate, OP_TYPE);
282 primary : SPECIAL_VARIABLE /* Various GDB extensions */
283 { write_dollar_variable (pstate, $1); }
292 simple_exp : '-' simple_exp %prec UNARY
293 { write_exp_elt_opcode (pstate, UNOP_NEG); }
296 simple_exp : '+' simple_exp %prec UNARY
297 { write_exp_elt_opcode (pstate, UNOP_PLUS); }
300 simple_exp : NOT simple_exp %prec UNARY
301 { write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT); }
304 simple_exp : ABS simple_exp %prec UNARY
305 { write_exp_elt_opcode (pstate, UNOP_ABS); }
308 arglist : { $$ = 0; }
317 | arglist ',' NAME ARROW exp
321 primary : '{' var_or_type '}' primary %prec '.'
325 error (_("Type required within braces in coercion"));
326 write_exp_elt_opcode (pstate, UNOP_MEMVAL);
327 write_exp_elt_type (pstate, $2);
328 write_exp_elt_opcode (pstate, UNOP_MEMVAL);
332 /* Binary operators in order of decreasing precedence. */
334 simple_exp : simple_exp STARSTAR simple_exp
335 { write_exp_elt_opcode (pstate, BINOP_EXP); }
338 simple_exp : simple_exp '*' simple_exp
339 { write_exp_elt_opcode (pstate, BINOP_MUL); }
342 simple_exp : simple_exp '/' simple_exp
343 { write_exp_elt_opcode (pstate, BINOP_DIV); }
346 simple_exp : simple_exp REM simple_exp /* May need to be fixed to give correct Ada REM */
347 { write_exp_elt_opcode (pstate, BINOP_REM); }
350 simple_exp : simple_exp MOD simple_exp
351 { write_exp_elt_opcode (pstate, BINOP_MOD); }
354 simple_exp : simple_exp '@' simple_exp /* GDB extension */
355 { write_exp_elt_opcode (pstate, BINOP_REPEAT); }
358 simple_exp : simple_exp '+' simple_exp
359 { write_exp_elt_opcode (pstate, BINOP_ADD); }
362 simple_exp : simple_exp '&' simple_exp
363 { write_exp_elt_opcode (pstate, BINOP_CONCAT); }
366 simple_exp : simple_exp '-' simple_exp
367 { write_exp_elt_opcode (pstate, BINOP_SUB); }
370 relation : simple_exp
373 relation : simple_exp '=' simple_exp
374 { write_exp_elt_opcode (pstate, BINOP_EQUAL); }
377 relation : simple_exp NOTEQUAL simple_exp
378 { write_exp_elt_opcode (pstate, BINOP_NOTEQUAL); }
381 relation : simple_exp LEQ simple_exp
382 { write_exp_elt_opcode (pstate, BINOP_LEQ); }
385 relation : simple_exp IN simple_exp DOTDOT simple_exp
386 { write_exp_elt_opcode (pstate, TERNOP_IN_RANGE); }
387 | simple_exp IN primary TICK_RANGE tick_arglist
388 { write_exp_elt_opcode (pstate, BINOP_IN_BOUNDS);
389 write_exp_elt_longcst (pstate, (LONGEST) $5);
390 write_exp_elt_opcode (pstate, BINOP_IN_BOUNDS);
392 | simple_exp IN var_or_type %prec TICK_ACCESS
395 error (_("Right operand of 'in' must be type"));
396 write_exp_elt_opcode (pstate, UNOP_IN_RANGE);
397 write_exp_elt_type (pstate, $3);
398 write_exp_elt_opcode (pstate, UNOP_IN_RANGE);
400 | simple_exp NOT IN simple_exp DOTDOT simple_exp
401 { write_exp_elt_opcode (pstate, TERNOP_IN_RANGE);
402 write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT);
404 | simple_exp NOT IN primary TICK_RANGE tick_arglist
405 { write_exp_elt_opcode (pstate, BINOP_IN_BOUNDS);
406 write_exp_elt_longcst (pstate, (LONGEST) $6);
407 write_exp_elt_opcode (pstate, BINOP_IN_BOUNDS);
408 write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT);
410 | simple_exp NOT IN var_or_type %prec TICK_ACCESS
413 error (_("Right operand of 'in' must be type"));
414 write_exp_elt_opcode (pstate, UNOP_IN_RANGE);
415 write_exp_elt_type (pstate, $4);
416 write_exp_elt_opcode (pstate, UNOP_IN_RANGE);
417 write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT);
421 relation : simple_exp GEQ simple_exp
422 { write_exp_elt_opcode (pstate, BINOP_GEQ); }
425 relation : simple_exp '<' simple_exp
426 { write_exp_elt_opcode (pstate, BINOP_LESS); }
429 relation : simple_exp '>' simple_exp
430 { write_exp_elt_opcode (pstate, BINOP_GTR); }
442 relation _AND_ relation
443 { write_exp_elt_opcode (pstate, BINOP_BITWISE_AND); }
444 | and_exp _AND_ relation
445 { write_exp_elt_opcode (pstate, BINOP_BITWISE_AND); }
449 relation _AND_ THEN relation
450 { write_exp_elt_opcode (pstate, BINOP_LOGICAL_AND); }
451 | and_then_exp _AND_ THEN relation
452 { write_exp_elt_opcode (pstate, BINOP_LOGICAL_AND); }
457 { write_exp_elt_opcode (pstate, BINOP_BITWISE_IOR); }
459 { write_exp_elt_opcode (pstate, BINOP_BITWISE_IOR); }
463 relation OR ELSE relation
464 { write_exp_elt_opcode (pstate, BINOP_LOGICAL_OR); }
465 | or_else_exp OR ELSE relation
466 { write_exp_elt_opcode (pstate, BINOP_LOGICAL_OR); }
469 xor_exp : relation XOR relation
470 { write_exp_elt_opcode (pstate, BINOP_BITWISE_XOR); }
471 | xor_exp XOR relation
472 { write_exp_elt_opcode (pstate, BINOP_BITWISE_XOR); }
475 /* Primaries can denote types (OP_TYPE). In cases such as
476 primary TICK_ADDRESS, where a type would be invalid, it will be
477 caught when evaluate_subexp in ada-lang.c tries to evaluate the
478 primary, expecting a value. Precedence rules resolve the ambiguity
479 in NAME TICK_ACCESS in favor of shifting to form a var_or_type. A
480 construct such as aType'access'access will again cause an error when
481 aType'access evaluates to a type that evaluate_subexp attempts to
483 primary : primary TICK_ACCESS
484 { write_exp_elt_opcode (pstate, UNOP_ADDR); }
485 | primary TICK_ADDRESS
486 { write_exp_elt_opcode (pstate, UNOP_ADDR);
487 write_exp_elt_opcode (pstate, UNOP_CAST);
488 write_exp_elt_type (pstate,
489 type_system_address (pstate));
490 write_exp_elt_opcode (pstate, UNOP_CAST);
492 | primary TICK_FIRST tick_arglist
493 { write_int (pstate, $3, type_int (pstate));
494 write_exp_elt_opcode (pstate, OP_ATR_FIRST); }
495 | primary TICK_LAST tick_arglist
496 { write_int (pstate, $3, type_int (pstate));
497 write_exp_elt_opcode (pstate, OP_ATR_LAST); }
498 | primary TICK_LENGTH tick_arglist
499 { write_int (pstate, $3, type_int (pstate));
500 write_exp_elt_opcode (pstate, OP_ATR_LENGTH); }
502 { write_exp_elt_opcode (pstate, OP_ATR_SIZE); }
504 { write_exp_elt_opcode (pstate, OP_ATR_TAG); }
505 | opt_type_prefix TICK_MIN '(' exp ',' exp ')'
506 { write_exp_elt_opcode (pstate, OP_ATR_MIN); }
507 | opt_type_prefix TICK_MAX '(' exp ',' exp ')'
508 { write_exp_elt_opcode (pstate, OP_ATR_MAX); }
509 | opt_type_prefix TICK_POS '(' exp ')'
510 { write_exp_elt_opcode (pstate, OP_ATR_POS); }
511 | type_prefix TICK_VAL '(' exp ')'
512 { write_exp_elt_opcode (pstate, OP_ATR_VAL); }
513 | type_prefix TICK_MODULUS
514 { write_exp_elt_opcode (pstate, OP_ATR_MODULUS); }
517 tick_arglist : %prec '('
527 error (_("Prefix must be type"));
528 write_exp_elt_opcode (pstate, OP_TYPE);
529 write_exp_elt_type (pstate, $1);
530 write_exp_elt_opcode (pstate, OP_TYPE); }
536 { write_exp_elt_opcode (pstate, OP_TYPE);
537 write_exp_elt_type (pstate,
538 parse_type (pstate)->builtin_void);
539 write_exp_elt_opcode (pstate, OP_TYPE); }
544 { write_int (pstate, (LONGEST) $1.val, $1.type); }
549 convert_char_literal (type_qualifier, $1.val),
550 (type_qualifier == NULL)
551 ? $1.type : type_qualifier);
556 { write_exp_elt_opcode (pstate, OP_DOUBLE);
557 write_exp_elt_type (pstate, $1.type);
558 write_exp_elt_dblcst (pstate, $1.dval);
559 write_exp_elt_opcode (pstate, OP_DOUBLE);
564 { write_int (pstate, 0, type_int (pstate)); }
569 write_exp_op_with_string (pstate, OP_STRING, $1);
573 primary : TRUEKEYWORD
574 { write_int (pstate, 1, type_boolean (pstate)); }
576 { write_int (pstate, 0, type_boolean (pstate)); }
580 { error (_("NEW not implemented.")); }
583 var_or_type: NAME %prec VAR
584 { $$ = write_var_or_type (pstate, NULL, $1); }
585 | block NAME %prec VAR
586 { $$ = write_var_or_type (pstate, $1, $2); }
589 $$ = write_var_or_type (pstate, NULL, $1);
591 write_exp_elt_opcode (pstate, UNOP_ADDR);
593 $$ = lookup_pointer_type ($$);
595 | block NAME TICK_ACCESS
597 $$ = write_var_or_type (pstate, $1, $2);
599 write_exp_elt_opcode (pstate, UNOP_ADDR);
601 $$ = lookup_pointer_type ($$);
606 block : NAME COLONCOLON
607 { $$ = block_lookup (NULL, $1.ptr); }
608 | block NAME COLONCOLON
609 { $$ = block_lookup ($1, $2.ptr); }
613 '(' aggregate_component_list ')'
615 write_exp_elt_opcode (pstate, OP_AGGREGATE);
616 write_exp_elt_longcst (pstate, $2);
617 write_exp_elt_opcode (pstate, OP_AGGREGATE);
621 aggregate_component_list :
622 component_groups { $$ = $1; }
623 | positional_list exp
624 { write_exp_elt_opcode (pstate, OP_POSITIONAL);
625 write_exp_elt_longcst (pstate, $1);
626 write_exp_elt_opcode (pstate, OP_POSITIONAL);
629 | positional_list component_groups
635 { write_exp_elt_opcode (pstate, OP_POSITIONAL);
636 write_exp_elt_longcst (pstate, 0);
637 write_exp_elt_opcode (pstate, OP_POSITIONAL);
640 | positional_list exp ','
641 { write_exp_elt_opcode (pstate, OP_POSITIONAL);
642 write_exp_elt_longcst (pstate, $1);
643 write_exp_elt_opcode (pstate, OP_POSITIONAL);
650 | component_group { $$ = 1; }
651 | component_group ',' component_groups
655 others : OTHERS ARROW exp
656 { write_exp_elt_opcode (pstate, OP_OTHERS); }
660 component_associations
662 write_exp_elt_opcode (pstate, OP_CHOICES);
663 write_exp_elt_longcst (pstate, $1);
664 write_exp_elt_opcode (pstate, OP_CHOICES);
668 /* We use this somewhat obscure definition in order to handle NAME => and
669 NAME | differently from exp => and exp |. ARROW and '|' have a precedence
670 above that of the reduction of NAME to var_or_type. By delaying
671 decisions until after the => or '|', we convert the ambiguity to a
672 resolved shift/reduce conflict. */
673 component_associations :
675 { write_name_assoc (pstate, $1); }
677 | simple_exp ARROW exp
679 | simple_exp DOTDOT simple_exp ARROW
680 { write_exp_elt_opcode (pstate, OP_DISCRETE_RANGE);
681 write_exp_op_with_string (pstate, OP_NAME,
686 { write_name_assoc (pstate, $1); }
687 component_associations { $$ = $4 + 1; }
689 component_associations { $$ = $3 + 1; }
690 | simple_exp DOTDOT simple_exp '|'
691 { write_exp_elt_opcode (pstate, OP_DISCRETE_RANGE); }
692 component_associations { $$ = $6 + 1; }
695 /* Some extensions borrowed from C, for the benefit of those who find they
696 can't get used to Ada notation in GDB. */
698 primary : '*' primary %prec '.'
699 { write_exp_elt_opcode (pstate, UNOP_IND); }
700 | '&' primary %prec '.'
701 { write_exp_elt_opcode (pstate, UNOP_ADDR); }
702 | primary '[' exp ']'
703 { write_exp_elt_opcode (pstate, BINOP_SUBSCRIPT); }
708 /* yylex defined in ada-lex.c: Reads one token, getting characters */
709 /* through lexptr. */
711 /* Remap normal flex interface names (yylex) as well as gratuitiously */
712 /* global symbol names, so we can have multiple flex-generated parsers */
715 /* (See note above on previous definitions for YACC.) */
717 #define yy_create_buffer ada_yy_create_buffer
718 #define yy_delete_buffer ada_yy_delete_buffer
719 #define yy_init_buffer ada_yy_init_buffer
720 #define yy_load_buffer_state ada_yy_load_buffer_state
721 #define yy_switch_to_buffer ada_yy_switch_to_buffer
722 #define yyrestart ada_yyrestart
723 #define yytext ada_yytext
724 #define yywrap ada_yywrap
726 static struct obstack temp_parse_space;
728 /* The following kludge was found necessary to prevent conflicts between */
729 /* defs.h and non-standard stdlib.h files. */
730 #define qsort __qsort__dummy
734 ada_parse (struct parser_state *par_state)
737 struct cleanup *c = make_cleanup_clear_parser_state (&pstate);
739 /* Setting up the parser state. */
740 gdb_assert (par_state != NULL);
743 lexer_init (yyin); /* (Re-)initialize lexer. */
744 type_qualifier = NULL;
745 obstack_free (&temp_parse_space, NULL);
746 obstack_init (&temp_parse_space);
756 error (_("Error in expression, near `%s'."), lexptr);
759 /* Emit expression to access an instance of SYM, in block BLOCK (if
760 * non-NULL), and with :: qualification ORIG_LEFT_CONTEXT. */
762 write_var_from_sym (struct parser_state *par_state,
763 const struct block *orig_left_context,
764 const struct block *block,
767 if (orig_left_context == NULL && symbol_read_needs_frame (sym))
769 if (innermost_block == 0
770 || contained_in (block, innermost_block))
771 innermost_block = block;
774 write_exp_elt_opcode (par_state, OP_VAR_VALUE);
775 write_exp_elt_block (par_state, block);
776 write_exp_elt_sym (par_state, sym);
777 write_exp_elt_opcode (par_state, OP_VAR_VALUE);
780 /* Write integer or boolean constant ARG of type TYPE. */
783 write_int (struct parser_state *par_state, LONGEST arg, struct type *type)
785 write_exp_elt_opcode (par_state, OP_LONG);
786 write_exp_elt_type (par_state, type);
787 write_exp_elt_longcst (par_state, arg);
788 write_exp_elt_opcode (par_state, OP_LONG);
791 /* Write an OPCODE, string, OPCODE sequence to the current expression. */
793 write_exp_op_with_string (struct parser_state *par_state,
794 enum exp_opcode opcode, struct stoken token)
796 write_exp_elt_opcode (par_state, opcode);
797 write_exp_string (par_state, token);
798 write_exp_elt_opcode (par_state, opcode);
801 /* Emit expression corresponding to the renamed object named
802 * designated by RENAMED_ENTITY[0 .. RENAMED_ENTITY_LEN-1] in the
803 * context of ORIG_LEFT_CONTEXT, to which is applied the operations
804 * encoded by RENAMING_EXPR. MAX_DEPTH is the maximum number of
805 * cascaded renamings to allow. If ORIG_LEFT_CONTEXT is null, it
806 * defaults to the currently selected block. ORIG_SYMBOL is the
807 * symbol that originally encoded the renaming. It is needed only
808 * because its prefix also qualifies any index variables used to index
809 * or slice an array. It should not be necessary once we go to the
810 * new encoding entirely (FIXME pnh 7/20/2007). */
813 write_object_renaming (struct parser_state *par_state,
814 const struct block *orig_left_context,
815 const char *renamed_entity, int renamed_entity_len,
816 const char *renaming_expr, int max_depth)
819 enum { SIMPLE_INDEX, LOWER_BOUND, UPPER_BOUND } slice_state;
820 struct block_symbol sym_info;
823 error (_("Could not find renamed symbol"));
825 if (orig_left_context == NULL)
826 orig_left_context = get_selected_block (NULL);
828 name = (char *) obstack_copy0 (&temp_parse_space, renamed_entity,
830 ada_lookup_encoded_symbol (name, orig_left_context, VAR_DOMAIN, &sym_info);
831 if (sym_info.symbol == NULL)
832 error (_("Could not find renamed variable: %s"), ada_decode (name));
833 else if (SYMBOL_CLASS (sym_info.symbol) == LOC_TYPEDEF)
834 /* We have a renaming of an old-style renaming symbol. Don't
835 trust the block information. */
836 sym_info.block = orig_left_context;
839 const char *inner_renamed_entity;
840 int inner_renamed_entity_len;
841 const char *inner_renaming_expr;
843 switch (ada_parse_renaming (sym_info.symbol, &inner_renamed_entity,
844 &inner_renamed_entity_len,
845 &inner_renaming_expr))
847 case ADA_NOT_RENAMING:
848 write_var_from_sym (par_state, orig_left_context, sym_info.block,
851 case ADA_OBJECT_RENAMING:
852 write_object_renaming (par_state, sym_info.block,
853 inner_renamed_entity, inner_renamed_entity_len,
854 inner_renaming_expr, max_depth - 1);
861 slice_state = SIMPLE_INDEX;
862 while (*renaming_expr == 'X')
866 switch (*renaming_expr) {
869 write_exp_elt_opcode (par_state, UNOP_IND);
872 slice_state = LOWER_BOUND;
876 if (isdigit (*renaming_expr))
879 long val = strtol (renaming_expr, &next, 10);
880 if (next == renaming_expr)
882 renaming_expr = next;
883 write_exp_elt_opcode (par_state, OP_LONG);
884 write_exp_elt_type (par_state, type_int (par_state));
885 write_exp_elt_longcst (par_state, (LONGEST) val);
886 write_exp_elt_opcode (par_state, OP_LONG);
892 struct block_symbol index_sym_info;
894 end = strchr (renaming_expr, 'X');
896 end = renaming_expr + strlen (renaming_expr);
899 = (char *) obstack_copy0 (&temp_parse_space, renaming_expr,
900 end - renaming_expr);
903 ada_lookup_encoded_symbol (index_name, NULL, VAR_DOMAIN,
905 if (index_sym_info.symbol == NULL)
906 error (_("Could not find %s"), index_name);
907 else if (SYMBOL_CLASS (index_sym_info.symbol) == LOC_TYPEDEF)
908 /* Index is an old-style renaming symbol. */
909 index_sym_info.block = orig_left_context;
910 write_var_from_sym (par_state, NULL, index_sym_info.block,
911 index_sym_info.symbol);
913 if (slice_state == SIMPLE_INDEX)
915 write_exp_elt_opcode (par_state, OP_FUNCALL);
916 write_exp_elt_longcst (par_state, (LONGEST) 1);
917 write_exp_elt_opcode (par_state, OP_FUNCALL);
919 else if (slice_state == LOWER_BOUND)
920 slice_state = UPPER_BOUND;
921 else if (slice_state == UPPER_BOUND)
923 write_exp_elt_opcode (par_state, TERNOP_SLICE);
924 slice_state = SIMPLE_INDEX;
930 struct stoken field_name;
936 if (slice_state != SIMPLE_INDEX)
938 end = strchr (renaming_expr, 'X');
940 end = renaming_expr + strlen (renaming_expr);
941 field_name.length = end - renaming_expr;
942 buf = (char *) malloc (end - renaming_expr + 1);
943 field_name.ptr = buf;
944 strncpy (buf, renaming_expr, end - renaming_expr);
945 buf[end - renaming_expr] = '\000';
947 write_exp_op_with_string (par_state, STRUCTOP_STRUCT, field_name);
955 if (slice_state == SIMPLE_INDEX)
959 error (_("Internal error in encoding of renaming declaration"));
962 static const struct block*
963 block_lookup (const struct block *context, const char *raw_name)
966 struct block_symbol *syms;
968 struct symtab *symtab;
970 if (raw_name[0] == '\'')
976 name = ada_encode (raw_name);
978 nsyms = ada_lookup_symbol_list (name, context, VAR_DOMAIN, &syms);
980 && (nsyms == 0 || SYMBOL_CLASS (syms[0].symbol) != LOC_BLOCK))
981 symtab = lookup_symtab (name);
986 return BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (symtab), STATIC_BLOCK);
987 else if (nsyms == 0 || SYMBOL_CLASS (syms[0].symbol) != LOC_BLOCK)
990 error (_("No file or function \"%s\"."), raw_name);
992 error (_("No function \"%s\" in specified context."), raw_name);
997 warning (_("Function name \"%s\" ambiguous here"), raw_name);
998 return SYMBOL_BLOCK_VALUE (syms[0].symbol);
1002 static struct symbol*
1003 select_possible_type_sym (struct block_symbol *syms, int nsyms)
1006 int preferred_index;
1007 struct type *preferred_type;
1009 preferred_index = -1; preferred_type = NULL;
1010 for (i = 0; i < nsyms; i += 1)
1011 switch (SYMBOL_CLASS (syms[i].symbol))
1014 if (ada_prefer_type (SYMBOL_TYPE (syms[i].symbol), preferred_type))
1016 preferred_index = i;
1017 preferred_type = SYMBOL_TYPE (syms[i].symbol);
1023 case LOC_REGPARM_ADDR:
1030 if (preferred_type == NULL)
1032 return syms[preferred_index].symbol;
1036 find_primitive_type (struct parser_state *par_state, char *name)
1039 type = language_lookup_primitive_type (parse_language (par_state),
1040 parse_gdbarch (par_state),
1042 if (type == NULL && strcmp ("system__address", name) == 0)
1043 type = type_system_address (par_state);
1047 /* Check to see if we have a regular definition of this
1048 type that just didn't happen to have been read yet. */
1050 char *expanded_name =
1051 (char *) alloca (strlen (name) + sizeof ("standard__"));
1052 strcpy (expanded_name, "standard__");
1053 strcat (expanded_name, name);
1054 sym = ada_lookup_symbol (expanded_name, NULL, VAR_DOMAIN, NULL).symbol;
1055 if (sym != NULL && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
1056 type = SYMBOL_TYPE (sym);
1063 chop_selector (char *name, int end)
1066 for (i = end - 1; i > 0; i -= 1)
1067 if (name[i] == '.' || (name[i] == '_' && name[i+1] == '_'))
1072 /* If NAME is a string beginning with a separator (either '__', or
1073 '.'), chop this separator and return the result; else, return
1077 chop_separator (char *name)
1082 if (name[0] == '_' && name[1] == '_')
1088 /* Given that SELS is a string of the form (<sep><identifier>)*, where
1089 <sep> is '__' or '.', write the indicated sequence of
1090 STRUCTOP_STRUCT expression operators. */
1092 write_selectors (struct parser_state *par_state, char *sels)
1094 while (*sels != '\0')
1096 struct stoken field_name;
1097 char *p = chop_separator (sels);
1099 while (*sels != '\0' && *sels != '.'
1100 && (sels[0] != '_' || sels[1] != '_'))
1102 field_name.length = sels - p;
1104 write_exp_op_with_string (par_state, STRUCTOP_STRUCT, field_name);
1108 /* Write a variable access (OP_VAR_VALUE) to ambiguous encoded name
1109 NAME[0..LEN-1], in block context BLOCK, to be resolved later. Writes
1110 a temporary symbol that is valid until the next call to ada_parse.
1113 write_ambiguous_var (struct parser_state *par_state,
1114 const struct block *block, char *name, int len)
1116 struct symbol *sym = XOBNEW (&temp_parse_space, struct symbol);
1118 memset (sym, 0, sizeof (struct symbol));
1119 SYMBOL_DOMAIN (sym) = UNDEF_DOMAIN;
1120 SYMBOL_LINKAGE_NAME (sym)
1121 = (const char *) obstack_copy0 (&temp_parse_space, name, len);
1122 SYMBOL_LANGUAGE (sym) = language_ada;
1124 write_exp_elt_opcode (par_state, OP_VAR_VALUE);
1125 write_exp_elt_block (par_state, block);
1126 write_exp_elt_sym (par_state, sym);
1127 write_exp_elt_opcode (par_state, OP_VAR_VALUE);
1130 /* A convenient wrapper around ada_get_field_index that takes
1131 a non NUL-terminated FIELD_NAME0 and a FIELD_NAME_LEN instead
1132 of a NUL-terminated field name. */
1135 ada_nget_field_index (const struct type *type, const char *field_name0,
1136 int field_name_len, int maybe_missing)
1138 char *field_name = (char *) alloca ((field_name_len + 1) * sizeof (char));
1140 strncpy (field_name, field_name0, field_name_len);
1141 field_name[field_name_len] = '\0';
1142 return ada_get_field_index (type, field_name, maybe_missing);
1145 /* If encoded_field_name is the name of a field inside symbol SYM,
1146 then return the type of that field. Otherwise, return NULL.
1148 This function is actually recursive, so if ENCODED_FIELD_NAME
1149 doesn't match one of the fields of our symbol, then try to see
1150 if ENCODED_FIELD_NAME could not be a succession of field names
1151 (in other words, the user entered an expression of the form
1152 TYPE_NAME.FIELD1.FIELD2.FIELD3), in which case we evaluate
1153 each field name sequentially to obtain the desired field type.
1154 In case of failure, we return NULL. */
1156 static struct type *
1157 get_symbol_field_type (struct symbol *sym, char *encoded_field_name)
1159 char *field_name = encoded_field_name;
1160 char *subfield_name;
1161 struct type *type = SYMBOL_TYPE (sym);
1164 if (type == NULL || field_name == NULL)
1166 type = check_typedef (type);
1168 while (field_name[0] != '\0')
1170 field_name = chop_separator (field_name);
1172 fieldno = ada_get_field_index (type, field_name, 1);
1174 return TYPE_FIELD_TYPE (type, fieldno);
1176 subfield_name = field_name;
1177 while (*subfield_name != '\0' && *subfield_name != '.'
1178 && (subfield_name[0] != '_' || subfield_name[1] != '_'))
1181 if (subfield_name[0] == '\0')
1184 fieldno = ada_nget_field_index (type, field_name,
1185 subfield_name - field_name, 1);
1189 type = TYPE_FIELD_TYPE (type, fieldno);
1190 field_name = subfield_name;
1196 /* Look up NAME0 (an unencoded identifier or dotted name) in BLOCK (or
1197 expression_block_context if NULL). If it denotes a type, return
1198 that type. Otherwise, write expression code to evaluate it as an
1199 object and return NULL. In this second case, NAME0 will, in general,
1200 have the form <name>(.<selector_name>)*, where <name> is an object
1201 or renaming encoded in the debugging data. Calls error if no
1202 prefix <name> matches a name in the debugging data (i.e., matches
1203 either a complete name or, as a wild-card match, the final
1207 write_var_or_type (struct parser_state *par_state,
1208 const struct block *block, struct stoken name0)
1215 block = expression_context_block;
1217 encoded_name = ada_encode (name0.ptr);
1218 name_len = strlen (encoded_name);
1220 = (char *) obstack_copy0 (&temp_parse_space, encoded_name, name_len);
1221 for (depth = 0; depth < MAX_RENAMING_CHAIN_LENGTH; depth += 1)
1225 tail_index = name_len;
1226 while (tail_index > 0)
1229 struct block_symbol *syms;
1230 struct symbol *type_sym;
1231 struct symbol *renaming_sym;
1232 const char* renaming;
1234 const char* renaming_expr;
1235 int terminator = encoded_name[tail_index];
1237 encoded_name[tail_index] = '\0';
1238 nsyms = ada_lookup_symbol_list (encoded_name, block,
1240 encoded_name[tail_index] = terminator;
1242 /* A single symbol may rename a package or object. */
1244 /* This should go away when we move entirely to new version.
1245 FIXME pnh 7/20/2007. */
1248 struct symbol *ren_sym =
1249 ada_find_renaming_symbol (syms[0].symbol, syms[0].block);
1251 if (ren_sym != NULL)
1252 syms[0].symbol = ren_sym;
1255 type_sym = select_possible_type_sym (syms, nsyms);
1257 if (type_sym != NULL)
1258 renaming_sym = type_sym;
1259 else if (nsyms == 1)
1260 renaming_sym = syms[0].symbol;
1262 renaming_sym = NULL;
1264 switch (ada_parse_renaming (renaming_sym, &renaming,
1265 &renaming_len, &renaming_expr))
1267 case ADA_NOT_RENAMING:
1269 case ADA_PACKAGE_RENAMING:
1270 case ADA_EXCEPTION_RENAMING:
1271 case ADA_SUBPROGRAM_RENAMING:
1273 int alloc_len = renaming_len + name_len - tail_index + 1;
1275 = (char *) obstack_alloc (&temp_parse_space, alloc_len);
1276 strncpy (new_name, renaming, renaming_len);
1277 strcpy (new_name + renaming_len, encoded_name + tail_index);
1278 encoded_name = new_name;
1279 name_len = renaming_len + name_len - tail_index;
1280 goto TryAfterRenaming;
1282 case ADA_OBJECT_RENAMING:
1283 write_object_renaming (par_state, block, renaming, renaming_len,
1284 renaming_expr, MAX_RENAMING_CHAIN_LENGTH);
1285 write_selectors (par_state, encoded_name + tail_index);
1288 internal_error (__FILE__, __LINE__,
1289 _("impossible value from ada_parse_renaming"));
1292 if (type_sym != NULL)
1294 struct type *field_type;
1296 if (tail_index == name_len)
1297 return SYMBOL_TYPE (type_sym);
1299 /* We have some extraneous characters after the type name.
1300 If this is an expression "TYPE_NAME.FIELD0.[...].FIELDN",
1301 then try to get the type of FIELDN. */
1303 = get_symbol_field_type (type_sym, encoded_name + tail_index);
1304 if (field_type != NULL)
1307 error (_("Invalid attempt to select from type: \"%s\"."),
1310 else if (tail_index == name_len && nsyms == 0)
1312 struct type *type = find_primitive_type (par_state,
1321 write_var_from_sym (par_state, block, syms[0].block,
1323 write_selectors (par_state, encoded_name + tail_index);
1326 else if (nsyms == 0)
1328 struct bound_minimal_symbol msym
1329 = ada_lookup_simple_minsym (encoded_name);
1330 if (msym.minsym != NULL)
1332 write_exp_msymbol (par_state, msym);
1333 /* Maybe cause error here rather than later? FIXME? */
1334 write_selectors (par_state, encoded_name + tail_index);
1338 if (tail_index == name_len
1339 && strncmp (encoded_name, "standard__",
1340 sizeof ("standard__") - 1) == 0)
1341 error (_("No definition of \"%s\" found."), name0.ptr);
1343 tail_index = chop_selector (encoded_name, tail_index);
1347 write_ambiguous_var (par_state, block, encoded_name,
1349 write_selectors (par_state, encoded_name + tail_index);
1354 if (!have_full_symbols () && !have_partial_symbols () && block == NULL)
1355 error (_("No symbol table is loaded. Use the \"file\" command."));
1356 if (block == expression_context_block)
1357 error (_("No definition of \"%s\" in current context."), name0.ptr);
1359 error (_("No definition of \"%s\" in specified context."), name0.ptr);
1364 error (_("Could not find renamed symbol \"%s\""), name0.ptr);
1368 /* Write a left side of a component association (e.g., NAME in NAME =>
1369 exp). If NAME has the form of a selected component, write it as an
1370 ordinary expression. If it is a simple variable that unambiguously
1371 corresponds to exactly one symbol that does not denote a type or an
1372 object renaming, also write it normally as an OP_VAR_VALUE.
1373 Otherwise, write it as an OP_NAME.
1375 Unfortunately, we don't know at this point whether NAME is supposed
1376 to denote a record component name or the value of an array index.
1377 Therefore, it is not appropriate to disambiguate an ambiguous name
1378 as we normally would, nor to replace a renaming with its referent.
1379 As a result, in the (one hopes) rare case that one writes an
1380 aggregate such as (R => 42) where R renames an object or is an
1381 ambiguous name, one must write instead ((R) => 42). */
1384 write_name_assoc (struct parser_state *par_state, struct stoken name)
1386 if (strchr (name.ptr, '.') == NULL)
1388 struct block_symbol *syms;
1389 int nsyms = ada_lookup_symbol_list (name.ptr, expression_context_block,
1392 if (nsyms != 1 || SYMBOL_CLASS (syms[0].symbol) == LOC_TYPEDEF)
1393 write_exp_op_with_string (par_state, OP_NAME, name);
1395 write_var_from_sym (par_state, NULL, syms[0].block, syms[0].symbol);
1398 if (write_var_or_type (par_state, NULL, name) != NULL)
1399 error (_("Invalid use of type."));
1402 /* Convert the character literal whose ASCII value would be VAL to the
1403 appropriate value of type TYPE, if there is a translation.
1404 Otherwise return VAL. Hence, in an enumeration type ('A', 'B'),
1405 the literal 'A' (VAL == 65), returns 0. */
1408 convert_char_literal (struct type *type, LONGEST val)
1415 type = check_typedef (type);
1416 if (TYPE_CODE (type) != TYPE_CODE_ENUM)
1419 xsnprintf (name, sizeof (name), "QU%02x", (int) val);
1420 for (f = 0; f < TYPE_NFIELDS (type); f += 1)
1422 if (strcmp (name, TYPE_FIELD_NAME (type, f)) == 0)
1423 return TYPE_FIELD_ENUMVAL (type, f);
1428 static struct type *
1429 type_int (struct parser_state *par_state)
1431 return parse_type (par_state)->builtin_int;
1434 static struct type *
1435 type_long (struct parser_state *par_state)
1437 return parse_type (par_state)->builtin_long;
1440 static struct type *
1441 type_long_long (struct parser_state *par_state)
1443 return parse_type (par_state)->builtin_long_long;
1446 static struct type *
1447 type_float (struct parser_state *par_state)
1449 return parse_type (par_state)->builtin_float;
1452 static struct type *
1453 type_double (struct parser_state *par_state)
1455 return parse_type (par_state)->builtin_double;
1458 static struct type *
1459 type_long_double (struct parser_state *par_state)
1461 return parse_type (par_state)->builtin_long_double;
1464 static struct type *
1465 type_char (struct parser_state *par_state)
1467 return language_string_char_type (parse_language (par_state),
1468 parse_gdbarch (par_state));
1471 static struct type *
1472 type_boolean (struct parser_state *par_state)
1474 return parse_type (par_state)->builtin_bool;
1477 static struct type *
1478 type_system_address (struct parser_state *par_state)
1481 = language_lookup_primitive_type (parse_language (par_state),
1482 parse_gdbarch (par_state),
1484 return type != NULL ? type : parse_type (par_state)->builtin_data_ptr;
1487 /* Provide a prototype to silence -Wmissing-prototypes. */
1488 extern initialize_file_ftype _initialize_ada_exp;
1491 _initialize_ada_exp (void)
1493 obstack_init (&temp_parse_space);