1 /* YACC parser for Ada expressions, for GDB.
2 Copyright (C) 1986-2019 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 static void yyerror (const 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_long_double (struct parser_state *);
111 static struct type *type_char (struct parser_state *);
113 static struct type *type_boolean (struct parser_state *);
115 static struct type *type_system_address (struct parser_state *);
132 const struct block *bval;
133 struct internalvar *ivar;
136 %type <lval> positional_list component_groups component_associations
137 %type <lval> aggregate_component_list
138 %type <tval> var_or_type
140 %token <typed_val> INT NULL_PTR CHARLIT
141 %token <typed_val_float> FLOAT
142 %token TRUEKEYWORD FALSEKEYWORD
144 %token <sval> STRING NAME DOT_ID
146 %type <lval> arglist tick_arglist
148 %type <tval> save_qualifier
152 /* Special type cases, put in to allow the parser to distinguish different
154 %token <sval> DOLLAR_VARIABLE
157 %left _AND_ OR XOR THEN ELSE
158 %left '=' NOTEQUAL '<' '>' LEQ GEQ IN DOTDOT
162 %left '*' '/' MOD REM
163 %right STARSTAR ABS NOT
165 /* Artificial token to give NAME => ... and NAME | priority over reducing
166 NAME to <primary> and to give <primary>' priority over reducing <primary>
172 %right TICK_ACCESS TICK_ADDRESS TICK_FIRST TICK_LAST TICK_LENGTH
173 %right TICK_MAX TICK_MIN TICK_MODULUS
174 %right TICK_POS TICK_RANGE TICK_SIZE TICK_TAG TICK_VAL
175 /* The following are right-associative only so that reductions at this
176 precedence have lower precedence than '.' and '('. The syntax still
177 forces a.b.c, e.g., to be LEFT-associated. */
178 %right '.' '(' '[' DOT_ID DOT_ALL
188 /* Expressions, including the sequencing operator. */
191 { write_exp_elt_opcode (pstate, BINOP_COMMA); }
192 | primary ASSIGN exp /* Extension for convenience */
193 { write_exp_elt_opcode (pstate, BINOP_ASSIGN); }
196 /* Expressions, not including the sequencing operator. */
197 primary : primary DOT_ALL
198 { write_exp_elt_opcode (pstate, UNOP_IND); }
201 primary : primary DOT_ID
202 { write_exp_op_with_string (pstate, STRUCTOP_STRUCT,
206 primary : primary '(' arglist ')'
208 write_exp_elt_opcode (pstate, OP_FUNCALL);
209 write_exp_elt_longcst (pstate, $3);
210 write_exp_elt_opcode (pstate, OP_FUNCALL);
212 | var_or_type '(' arglist ')'
217 error (_("Invalid conversion"));
218 write_exp_elt_opcode (pstate, UNOP_CAST);
219 write_exp_elt_type (pstate, $1);
220 write_exp_elt_opcode (pstate, UNOP_CAST);
224 write_exp_elt_opcode (pstate, OP_FUNCALL);
225 write_exp_elt_longcst (pstate, $3);
226 write_exp_elt_opcode (pstate, OP_FUNCALL);
231 primary : var_or_type '\'' save_qualifier { type_qualifier = $1; }
235 error (_("Type required for qualification"));
236 write_exp_elt_opcode (pstate, UNOP_QUAL);
237 write_exp_elt_type (pstate, $1);
238 write_exp_elt_opcode (pstate, UNOP_QUAL);
243 save_qualifier : { $$ = type_qualifier; }
247 primary '(' simple_exp DOTDOT simple_exp ')'
248 { write_exp_elt_opcode (pstate, TERNOP_SLICE); }
249 | var_or_type '(' simple_exp DOTDOT simple_exp ')'
251 write_exp_elt_opcode (pstate, TERNOP_SLICE);
253 error (_("Cannot slice a type"));
257 primary : '(' exp1 ')' { }
260 /* The following rule causes a conflict with the type conversion
262 To get around it, we give '(' higher priority and add bridge rules for
263 var_or_type (exp, exp, ...)
264 var_or_type (exp .. exp)
265 We also have the action for var_or_type(exp) generate a function call
266 when the first symbol does not denote a type. */
268 primary : var_or_type %prec VAR
271 write_exp_elt_opcode (pstate, OP_TYPE);
272 write_exp_elt_type (pstate, $1);
273 write_exp_elt_opcode (pstate, OP_TYPE);
278 primary : DOLLAR_VARIABLE /* Various GDB extensions */
279 { write_dollar_variable (pstate, $1); }
288 simple_exp : '-' simple_exp %prec UNARY
289 { write_exp_elt_opcode (pstate, UNOP_NEG); }
292 simple_exp : '+' simple_exp %prec UNARY
293 { write_exp_elt_opcode (pstate, UNOP_PLUS); }
296 simple_exp : NOT simple_exp %prec UNARY
297 { write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT); }
300 simple_exp : ABS simple_exp %prec UNARY
301 { write_exp_elt_opcode (pstate, UNOP_ABS); }
304 arglist : { $$ = 0; }
313 | arglist ',' NAME ARROW exp
317 primary : '{' var_or_type '}' primary %prec '.'
321 error (_("Type required within braces in coercion"));
322 write_exp_elt_opcode (pstate, UNOP_MEMVAL);
323 write_exp_elt_type (pstate, $2);
324 write_exp_elt_opcode (pstate, UNOP_MEMVAL);
328 /* Binary operators in order of decreasing precedence. */
330 simple_exp : simple_exp STARSTAR simple_exp
331 { write_exp_elt_opcode (pstate, BINOP_EXP); }
334 simple_exp : simple_exp '*' simple_exp
335 { write_exp_elt_opcode (pstate, BINOP_MUL); }
338 simple_exp : simple_exp '/' simple_exp
339 { write_exp_elt_opcode (pstate, BINOP_DIV); }
342 simple_exp : simple_exp REM simple_exp /* May need to be fixed to give correct Ada REM */
343 { write_exp_elt_opcode (pstate, BINOP_REM); }
346 simple_exp : simple_exp MOD simple_exp
347 { write_exp_elt_opcode (pstate, BINOP_MOD); }
350 simple_exp : simple_exp '@' simple_exp /* GDB extension */
351 { write_exp_elt_opcode (pstate, BINOP_REPEAT); }
354 simple_exp : simple_exp '+' simple_exp
355 { write_exp_elt_opcode (pstate, BINOP_ADD); }
358 simple_exp : simple_exp '&' simple_exp
359 { write_exp_elt_opcode (pstate, BINOP_CONCAT); }
362 simple_exp : simple_exp '-' simple_exp
363 { write_exp_elt_opcode (pstate, BINOP_SUB); }
366 relation : simple_exp
369 relation : simple_exp '=' simple_exp
370 { write_exp_elt_opcode (pstate, BINOP_EQUAL); }
373 relation : simple_exp NOTEQUAL simple_exp
374 { write_exp_elt_opcode (pstate, BINOP_NOTEQUAL); }
377 relation : simple_exp LEQ simple_exp
378 { write_exp_elt_opcode (pstate, BINOP_LEQ); }
381 relation : simple_exp IN simple_exp DOTDOT simple_exp
382 { write_exp_elt_opcode (pstate, TERNOP_IN_RANGE); }
383 | simple_exp IN primary TICK_RANGE tick_arglist
384 { write_exp_elt_opcode (pstate, BINOP_IN_BOUNDS);
385 write_exp_elt_longcst (pstate, (LONGEST) $5);
386 write_exp_elt_opcode (pstate, BINOP_IN_BOUNDS);
388 | simple_exp IN var_or_type %prec TICK_ACCESS
391 error (_("Right operand of 'in' must be type"));
392 write_exp_elt_opcode (pstate, UNOP_IN_RANGE);
393 write_exp_elt_type (pstate, $3);
394 write_exp_elt_opcode (pstate, UNOP_IN_RANGE);
396 | simple_exp NOT IN simple_exp DOTDOT simple_exp
397 { write_exp_elt_opcode (pstate, TERNOP_IN_RANGE);
398 write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT);
400 | simple_exp NOT IN primary TICK_RANGE tick_arglist
401 { write_exp_elt_opcode (pstate, BINOP_IN_BOUNDS);
402 write_exp_elt_longcst (pstate, (LONGEST) $6);
403 write_exp_elt_opcode (pstate, BINOP_IN_BOUNDS);
404 write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT);
406 | simple_exp NOT IN var_or_type %prec TICK_ACCESS
409 error (_("Right operand of 'in' must be type"));
410 write_exp_elt_opcode (pstate, UNOP_IN_RANGE);
411 write_exp_elt_type (pstate, $4);
412 write_exp_elt_opcode (pstate, UNOP_IN_RANGE);
413 write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT);
417 relation : simple_exp GEQ simple_exp
418 { write_exp_elt_opcode (pstate, BINOP_GEQ); }
421 relation : simple_exp '<' simple_exp
422 { write_exp_elt_opcode (pstate, BINOP_LESS); }
425 relation : simple_exp '>' simple_exp
426 { write_exp_elt_opcode (pstate, BINOP_GTR); }
438 relation _AND_ relation
439 { write_exp_elt_opcode (pstate, BINOP_BITWISE_AND); }
440 | and_exp _AND_ relation
441 { write_exp_elt_opcode (pstate, BINOP_BITWISE_AND); }
445 relation _AND_ THEN relation
446 { write_exp_elt_opcode (pstate, BINOP_LOGICAL_AND); }
447 | and_then_exp _AND_ THEN relation
448 { write_exp_elt_opcode (pstate, BINOP_LOGICAL_AND); }
453 { write_exp_elt_opcode (pstate, BINOP_BITWISE_IOR); }
455 { write_exp_elt_opcode (pstate, BINOP_BITWISE_IOR); }
459 relation OR ELSE relation
460 { write_exp_elt_opcode (pstate, BINOP_LOGICAL_OR); }
461 | or_else_exp OR ELSE relation
462 { write_exp_elt_opcode (pstate, BINOP_LOGICAL_OR); }
465 xor_exp : relation XOR relation
466 { write_exp_elt_opcode (pstate, BINOP_BITWISE_XOR); }
467 | xor_exp XOR relation
468 { write_exp_elt_opcode (pstate, BINOP_BITWISE_XOR); }
471 /* Primaries can denote types (OP_TYPE). In cases such as
472 primary TICK_ADDRESS, where a type would be invalid, it will be
473 caught when evaluate_subexp in ada-lang.c tries to evaluate the
474 primary, expecting a value. Precedence rules resolve the ambiguity
475 in NAME TICK_ACCESS in favor of shifting to form a var_or_type. A
476 construct such as aType'access'access will again cause an error when
477 aType'access evaluates to a type that evaluate_subexp attempts to
479 primary : primary TICK_ACCESS
480 { write_exp_elt_opcode (pstate, UNOP_ADDR); }
481 | primary TICK_ADDRESS
482 { write_exp_elt_opcode (pstate, UNOP_ADDR);
483 write_exp_elt_opcode (pstate, UNOP_CAST);
484 write_exp_elt_type (pstate,
485 type_system_address (pstate));
486 write_exp_elt_opcode (pstate, UNOP_CAST);
488 | primary TICK_FIRST tick_arglist
489 { write_int (pstate, $3, type_int (pstate));
490 write_exp_elt_opcode (pstate, OP_ATR_FIRST); }
491 | primary TICK_LAST tick_arglist
492 { write_int (pstate, $3, type_int (pstate));
493 write_exp_elt_opcode (pstate, OP_ATR_LAST); }
494 | primary TICK_LENGTH tick_arglist
495 { write_int (pstate, $3, type_int (pstate));
496 write_exp_elt_opcode (pstate, OP_ATR_LENGTH); }
498 { write_exp_elt_opcode (pstate, OP_ATR_SIZE); }
500 { write_exp_elt_opcode (pstate, OP_ATR_TAG); }
501 | opt_type_prefix TICK_MIN '(' exp ',' exp ')'
502 { write_exp_elt_opcode (pstate, OP_ATR_MIN); }
503 | opt_type_prefix TICK_MAX '(' exp ',' exp ')'
504 { write_exp_elt_opcode (pstate, OP_ATR_MAX); }
505 | opt_type_prefix TICK_POS '(' exp ')'
506 { write_exp_elt_opcode (pstate, OP_ATR_POS); }
507 | type_prefix TICK_VAL '(' exp ')'
508 { write_exp_elt_opcode (pstate, OP_ATR_VAL); }
509 | type_prefix TICK_MODULUS
510 { write_exp_elt_opcode (pstate, OP_ATR_MODULUS); }
513 tick_arglist : %prec '('
523 error (_("Prefix must be type"));
524 write_exp_elt_opcode (pstate, OP_TYPE);
525 write_exp_elt_type (pstate, $1);
526 write_exp_elt_opcode (pstate, OP_TYPE); }
532 { write_exp_elt_opcode (pstate, OP_TYPE);
533 write_exp_elt_type (pstate,
534 parse_type (pstate)->builtin_void);
535 write_exp_elt_opcode (pstate, OP_TYPE); }
540 { write_int (pstate, (LONGEST) $1.val, $1.type); }
545 convert_char_literal (type_qualifier, $1.val),
546 (type_qualifier == NULL)
547 ? $1.type : type_qualifier);
552 { write_exp_elt_opcode (pstate, OP_FLOAT);
553 write_exp_elt_type (pstate, $1.type);
554 write_exp_elt_floatcst (pstate, $1.val);
555 write_exp_elt_opcode (pstate, OP_FLOAT);
560 { write_int (pstate, 0, type_int (pstate)); }
565 write_exp_op_with_string (pstate, OP_STRING, $1);
569 primary : TRUEKEYWORD
570 { write_int (pstate, 1, type_boolean (pstate)); }
572 { write_int (pstate, 0, type_boolean (pstate)); }
576 { error (_("NEW not implemented.")); }
579 var_or_type: NAME %prec VAR
580 { $$ = write_var_or_type (pstate, NULL, $1); }
581 | block NAME %prec VAR
582 { $$ = write_var_or_type (pstate, $1, $2); }
585 $$ = write_var_or_type (pstate, NULL, $1);
587 write_exp_elt_opcode (pstate, UNOP_ADDR);
589 $$ = lookup_pointer_type ($$);
591 | block NAME TICK_ACCESS
593 $$ = write_var_or_type (pstate, $1, $2);
595 write_exp_elt_opcode (pstate, UNOP_ADDR);
597 $$ = lookup_pointer_type ($$);
602 block : NAME COLONCOLON
603 { $$ = block_lookup (NULL, $1.ptr); }
604 | block NAME COLONCOLON
605 { $$ = block_lookup ($1, $2.ptr); }
609 '(' aggregate_component_list ')'
611 write_exp_elt_opcode (pstate, OP_AGGREGATE);
612 write_exp_elt_longcst (pstate, $2);
613 write_exp_elt_opcode (pstate, OP_AGGREGATE);
617 aggregate_component_list :
618 component_groups { $$ = $1; }
619 | positional_list exp
620 { write_exp_elt_opcode (pstate, OP_POSITIONAL);
621 write_exp_elt_longcst (pstate, $1);
622 write_exp_elt_opcode (pstate, OP_POSITIONAL);
625 | positional_list component_groups
631 { write_exp_elt_opcode (pstate, OP_POSITIONAL);
632 write_exp_elt_longcst (pstate, 0);
633 write_exp_elt_opcode (pstate, OP_POSITIONAL);
636 | positional_list exp ','
637 { write_exp_elt_opcode (pstate, OP_POSITIONAL);
638 write_exp_elt_longcst (pstate, $1);
639 write_exp_elt_opcode (pstate, OP_POSITIONAL);
646 | component_group { $$ = 1; }
647 | component_group ',' component_groups
651 others : OTHERS ARROW exp
652 { write_exp_elt_opcode (pstate, OP_OTHERS); }
656 component_associations
658 write_exp_elt_opcode (pstate, OP_CHOICES);
659 write_exp_elt_longcst (pstate, $1);
660 write_exp_elt_opcode (pstate, OP_CHOICES);
664 /* We use this somewhat obscure definition in order to handle NAME => and
665 NAME | differently from exp => and exp |. ARROW and '|' have a precedence
666 above that of the reduction of NAME to var_or_type. By delaying
667 decisions until after the => or '|', we convert the ambiguity to a
668 resolved shift/reduce conflict. */
669 component_associations :
671 { write_name_assoc (pstate, $1); }
673 | simple_exp ARROW exp
675 | simple_exp DOTDOT simple_exp ARROW
676 { write_exp_elt_opcode (pstate, OP_DISCRETE_RANGE);
677 write_exp_op_with_string (pstate, OP_NAME,
682 { write_name_assoc (pstate, $1); }
683 component_associations { $$ = $4 + 1; }
685 component_associations { $$ = $3 + 1; }
686 | simple_exp DOTDOT simple_exp '|'
687 { write_exp_elt_opcode (pstate, OP_DISCRETE_RANGE); }
688 component_associations { $$ = $6 + 1; }
691 /* Some extensions borrowed from C, for the benefit of those who find they
692 can't get used to Ada notation in GDB. */
694 primary : '*' primary %prec '.'
695 { write_exp_elt_opcode (pstate, UNOP_IND); }
696 | '&' primary %prec '.'
697 { write_exp_elt_opcode (pstate, UNOP_ADDR); }
698 | primary '[' exp ']'
699 { write_exp_elt_opcode (pstate, BINOP_SUBSCRIPT); }
704 /* yylex defined in ada-lex.c: Reads one token, getting characters */
705 /* through lexptr. */
707 /* Remap normal flex interface names (yylex) as well as gratuitiously */
708 /* global symbol names, so we can have multiple flex-generated parsers */
711 /* (See note above on previous definitions for YACC.) */
713 #define yy_create_buffer ada_yy_create_buffer
714 #define yy_delete_buffer ada_yy_delete_buffer
715 #define yy_init_buffer ada_yy_init_buffer
716 #define yy_load_buffer_state ada_yy_load_buffer_state
717 #define yy_switch_to_buffer ada_yy_switch_to_buffer
718 #define yyrestart ada_yyrestart
719 #define yytext ada_yytext
720 #define yywrap ada_yywrap
722 static struct obstack temp_parse_space;
724 /* The following kludge was found necessary to prevent conflicts between */
725 /* defs.h and non-standard stdlib.h files. */
726 #define qsort __qsort__dummy
730 ada_parse (struct parser_state *par_state)
732 /* Setting up the parser state. */
733 scoped_restore pstate_restore = make_scoped_restore (&pstate);
734 gdb_assert (par_state != NULL);
737 lexer_init (yyin); /* (Re-)initialize lexer. */
738 type_qualifier = NULL;
739 obstack_free (&temp_parse_space, NULL);
740 obstack_init (&temp_parse_space);
746 yyerror (const char *msg)
748 error (_("Error in expression, near `%s'."), lexptr);
751 /* Emit expression to access an instance of SYM, in block BLOCK (if
755 write_var_from_sym (struct parser_state *par_state,
756 const struct block *block,
759 if (symbol_read_needs_frame (sym))
760 innermost_block.update (block, INNERMOST_BLOCK_FOR_SYMBOLS);
762 write_exp_elt_opcode (par_state, OP_VAR_VALUE);
763 write_exp_elt_block (par_state, block);
764 write_exp_elt_sym (par_state, sym);
765 write_exp_elt_opcode (par_state, OP_VAR_VALUE);
768 /* Write integer or boolean constant ARG of type TYPE. */
771 write_int (struct parser_state *par_state, LONGEST arg, struct type *type)
773 write_exp_elt_opcode (par_state, OP_LONG);
774 write_exp_elt_type (par_state, type);
775 write_exp_elt_longcst (par_state, arg);
776 write_exp_elt_opcode (par_state, OP_LONG);
779 /* Write an OPCODE, string, OPCODE sequence to the current expression. */
781 write_exp_op_with_string (struct parser_state *par_state,
782 enum exp_opcode opcode, struct stoken token)
784 write_exp_elt_opcode (par_state, opcode);
785 write_exp_string (par_state, token);
786 write_exp_elt_opcode (par_state, opcode);
789 /* Emit expression corresponding to the renamed object named
790 * designated by RENAMED_ENTITY[0 .. RENAMED_ENTITY_LEN-1] in the
791 * context of ORIG_LEFT_CONTEXT, to which is applied the operations
792 * encoded by RENAMING_EXPR. MAX_DEPTH is the maximum number of
793 * cascaded renamings to allow. If ORIG_LEFT_CONTEXT is null, it
794 * defaults to the currently selected block. ORIG_SYMBOL is the
795 * symbol that originally encoded the renaming. It is needed only
796 * because its prefix also qualifies any index variables used to index
797 * or slice an array. It should not be necessary once we go to the
798 * new encoding entirely (FIXME pnh 7/20/2007). */
801 write_object_renaming (struct parser_state *par_state,
802 const struct block *orig_left_context,
803 const char *renamed_entity, int renamed_entity_len,
804 const char *renaming_expr, int max_depth)
807 enum { SIMPLE_INDEX, LOWER_BOUND, UPPER_BOUND } slice_state;
808 struct block_symbol sym_info;
811 error (_("Could not find renamed symbol"));
813 if (orig_left_context == NULL)
814 orig_left_context = get_selected_block (NULL);
816 name = (char *) obstack_copy0 (&temp_parse_space, renamed_entity,
818 ada_lookup_encoded_symbol (name, orig_left_context, VAR_DOMAIN, &sym_info);
819 if (sym_info.symbol == NULL)
820 error (_("Could not find renamed variable: %s"), ada_decode (name));
821 else if (SYMBOL_CLASS (sym_info.symbol) == LOC_TYPEDEF)
822 /* We have a renaming of an old-style renaming symbol. Don't
823 trust the block information. */
824 sym_info.block = orig_left_context;
827 const char *inner_renamed_entity;
828 int inner_renamed_entity_len;
829 const char *inner_renaming_expr;
831 switch (ada_parse_renaming (sym_info.symbol, &inner_renamed_entity,
832 &inner_renamed_entity_len,
833 &inner_renaming_expr))
835 case ADA_NOT_RENAMING:
836 write_var_from_sym (par_state, sym_info.block, sym_info.symbol);
838 case ADA_OBJECT_RENAMING:
839 write_object_renaming (par_state, sym_info.block,
840 inner_renamed_entity, inner_renamed_entity_len,
841 inner_renaming_expr, max_depth - 1);
848 slice_state = SIMPLE_INDEX;
849 while (*renaming_expr == 'X')
853 switch (*renaming_expr) {
856 write_exp_elt_opcode (par_state, UNOP_IND);
859 slice_state = LOWER_BOUND;
863 if (isdigit (*renaming_expr))
866 long val = strtol (renaming_expr, &next, 10);
867 if (next == renaming_expr)
869 renaming_expr = next;
870 write_exp_elt_opcode (par_state, OP_LONG);
871 write_exp_elt_type (par_state, type_int (par_state));
872 write_exp_elt_longcst (par_state, (LONGEST) val);
873 write_exp_elt_opcode (par_state, OP_LONG);
879 struct block_symbol index_sym_info;
881 end = strchr (renaming_expr, 'X');
883 end = renaming_expr + strlen (renaming_expr);
886 = (char *) obstack_copy0 (&temp_parse_space, renaming_expr,
887 end - renaming_expr);
890 ada_lookup_encoded_symbol (index_name, orig_left_context,
891 VAR_DOMAIN, &index_sym_info);
892 if (index_sym_info.symbol == NULL)
893 error (_("Could not find %s"), index_name);
894 else if (SYMBOL_CLASS (index_sym_info.symbol) == LOC_TYPEDEF)
895 /* Index is an old-style renaming symbol. */
896 index_sym_info.block = orig_left_context;
897 write_var_from_sym (par_state, index_sym_info.block,
898 index_sym_info.symbol);
900 if (slice_state == SIMPLE_INDEX)
902 write_exp_elt_opcode (par_state, OP_FUNCALL);
903 write_exp_elt_longcst (par_state, (LONGEST) 1);
904 write_exp_elt_opcode (par_state, OP_FUNCALL);
906 else if (slice_state == LOWER_BOUND)
907 slice_state = UPPER_BOUND;
908 else if (slice_state == UPPER_BOUND)
910 write_exp_elt_opcode (par_state, TERNOP_SLICE);
911 slice_state = SIMPLE_INDEX;
917 struct stoken field_name;
923 if (slice_state != SIMPLE_INDEX)
925 end = strchr (renaming_expr, 'X');
927 end = renaming_expr + strlen (renaming_expr);
928 field_name.length = end - renaming_expr;
929 buf = (char *) malloc (end - renaming_expr + 1);
930 field_name.ptr = buf;
931 strncpy (buf, renaming_expr, end - renaming_expr);
932 buf[end - renaming_expr] = '\000';
934 write_exp_op_with_string (par_state, STRUCTOP_STRUCT, field_name);
942 if (slice_state == SIMPLE_INDEX)
946 error (_("Internal error in encoding of renaming declaration"));
949 static const struct block*
950 block_lookup (const struct block *context, const char *raw_name)
953 std::vector<struct block_symbol> syms;
955 struct symtab *symtab;
956 const struct block *result = NULL;
958 if (raw_name[0] == '\'')
964 name = ada_encode (raw_name);
966 nsyms = ada_lookup_symbol_list (name, context, VAR_DOMAIN, &syms);
969 && (nsyms == 0 || SYMBOL_CLASS (syms[0].symbol) != LOC_BLOCK))
970 symtab = lookup_symtab (name);
975 result = BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (symtab), STATIC_BLOCK);
976 else if (nsyms == 0 || SYMBOL_CLASS (syms[0].symbol) != LOC_BLOCK)
979 error (_("No file or function \"%s\"."), raw_name);
981 error (_("No function \"%s\" in specified context."), raw_name);
986 warning (_("Function name \"%s\" ambiguous here"), raw_name);
987 result = SYMBOL_BLOCK_VALUE (syms[0].symbol);
993 static struct symbol*
994 select_possible_type_sym (const std::vector<struct block_symbol> &syms)
998 struct type *preferred_type;
1000 preferred_index = -1; preferred_type = NULL;
1001 for (i = 0; i < syms.size (); i += 1)
1002 switch (SYMBOL_CLASS (syms[i].symbol))
1005 if (ada_prefer_type (SYMBOL_TYPE (syms[i].symbol), preferred_type))
1007 preferred_index = i;
1008 preferred_type = SYMBOL_TYPE (syms[i].symbol);
1014 case LOC_REGPARM_ADDR:
1021 if (preferred_type == NULL)
1023 return syms[preferred_index].symbol;
1027 find_primitive_type (struct parser_state *par_state, char *name)
1030 type = language_lookup_primitive_type (parse_language (par_state),
1031 parse_gdbarch (par_state),
1033 if (type == NULL && strcmp ("system__address", name) == 0)
1034 type = type_system_address (par_state);
1038 /* Check to see if we have a regular definition of this
1039 type that just didn't happen to have been read yet. */
1041 char *expanded_name =
1042 (char *) alloca (strlen (name) + sizeof ("standard__"));
1043 strcpy (expanded_name, "standard__");
1044 strcat (expanded_name, name);
1045 sym = ada_lookup_symbol (expanded_name, NULL, VAR_DOMAIN, NULL).symbol;
1046 if (sym != NULL && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
1047 type = SYMBOL_TYPE (sym);
1054 chop_selector (char *name, int end)
1057 for (i = end - 1; i > 0; i -= 1)
1058 if (name[i] == '.' || (name[i] == '_' && name[i+1] == '_'))
1063 /* If NAME is a string beginning with a separator (either '__', or
1064 '.'), chop this separator and return the result; else, return
1068 chop_separator (char *name)
1073 if (name[0] == '_' && name[1] == '_')
1079 /* Given that SELS is a string of the form (<sep><identifier>)*, where
1080 <sep> is '__' or '.', write the indicated sequence of
1081 STRUCTOP_STRUCT expression operators. */
1083 write_selectors (struct parser_state *par_state, char *sels)
1085 while (*sels != '\0')
1087 struct stoken field_name;
1088 char *p = chop_separator (sels);
1090 while (*sels != '\0' && *sels != '.'
1091 && (sels[0] != '_' || sels[1] != '_'))
1093 field_name.length = sels - p;
1095 write_exp_op_with_string (par_state, STRUCTOP_STRUCT, field_name);
1099 /* Write a variable access (OP_VAR_VALUE) to ambiguous encoded name
1100 NAME[0..LEN-1], in block context BLOCK, to be resolved later. Writes
1101 a temporary symbol that is valid until the next call to ada_parse.
1104 write_ambiguous_var (struct parser_state *par_state,
1105 const struct block *block, char *name, int len)
1107 struct symbol *sym = XOBNEW (&temp_parse_space, struct symbol);
1109 memset (sym, 0, sizeof (struct symbol));
1110 SYMBOL_DOMAIN (sym) = UNDEF_DOMAIN;
1111 SYMBOL_LINKAGE_NAME (sym)
1112 = (const char *) obstack_copy0 (&temp_parse_space, name, len);
1113 SYMBOL_LANGUAGE (sym) = language_ada;
1115 write_exp_elt_opcode (par_state, OP_VAR_VALUE);
1116 write_exp_elt_block (par_state, block);
1117 write_exp_elt_sym (par_state, sym);
1118 write_exp_elt_opcode (par_state, OP_VAR_VALUE);
1121 /* A convenient wrapper around ada_get_field_index that takes
1122 a non NUL-terminated FIELD_NAME0 and a FIELD_NAME_LEN instead
1123 of a NUL-terminated field name. */
1126 ada_nget_field_index (const struct type *type, const char *field_name0,
1127 int field_name_len, int maybe_missing)
1129 char *field_name = (char *) alloca ((field_name_len + 1) * sizeof (char));
1131 strncpy (field_name, field_name0, field_name_len);
1132 field_name[field_name_len] = '\0';
1133 return ada_get_field_index (type, field_name, maybe_missing);
1136 /* If encoded_field_name is the name of a field inside symbol SYM,
1137 then return the type of that field. Otherwise, return NULL.
1139 This function is actually recursive, so if ENCODED_FIELD_NAME
1140 doesn't match one of the fields of our symbol, then try to see
1141 if ENCODED_FIELD_NAME could not be a succession of field names
1142 (in other words, the user entered an expression of the form
1143 TYPE_NAME.FIELD1.FIELD2.FIELD3), in which case we evaluate
1144 each field name sequentially to obtain the desired field type.
1145 In case of failure, we return NULL. */
1147 static struct type *
1148 get_symbol_field_type (struct symbol *sym, char *encoded_field_name)
1150 char *field_name = encoded_field_name;
1151 char *subfield_name;
1152 struct type *type = SYMBOL_TYPE (sym);
1155 if (type == NULL || field_name == NULL)
1157 type = check_typedef (type);
1159 while (field_name[0] != '\0')
1161 field_name = chop_separator (field_name);
1163 fieldno = ada_get_field_index (type, field_name, 1);
1165 return TYPE_FIELD_TYPE (type, fieldno);
1167 subfield_name = field_name;
1168 while (*subfield_name != '\0' && *subfield_name != '.'
1169 && (subfield_name[0] != '_' || subfield_name[1] != '_'))
1172 if (subfield_name[0] == '\0')
1175 fieldno = ada_nget_field_index (type, field_name,
1176 subfield_name - field_name, 1);
1180 type = TYPE_FIELD_TYPE (type, fieldno);
1181 field_name = subfield_name;
1187 /* Look up NAME0 (an unencoded identifier or dotted name) in BLOCK (or
1188 expression_block_context if NULL). If it denotes a type, return
1189 that type. Otherwise, write expression code to evaluate it as an
1190 object and return NULL. In this second case, NAME0 will, in general,
1191 have the form <name>(.<selector_name>)*, where <name> is an object
1192 or renaming encoded in the debugging data. Calls error if no
1193 prefix <name> matches a name in the debugging data (i.e., matches
1194 either a complete name or, as a wild-card match, the final
1198 write_var_or_type (struct parser_state *par_state,
1199 const struct block *block, struct stoken name0)
1206 block = expression_context_block;
1208 encoded_name = ada_encode (name0.ptr);
1209 name_len = strlen (encoded_name);
1211 = (char *) obstack_copy0 (&temp_parse_space, encoded_name, name_len);
1212 for (depth = 0; depth < MAX_RENAMING_CHAIN_LENGTH; depth += 1)
1216 tail_index = name_len;
1217 while (tail_index > 0)
1220 std::vector<struct block_symbol> syms;
1221 struct symbol *type_sym;
1222 struct symbol *renaming_sym;
1223 const char* renaming;
1225 const char* renaming_expr;
1226 int terminator = encoded_name[tail_index];
1228 encoded_name[tail_index] = '\0';
1229 nsyms = ada_lookup_symbol_list (encoded_name, block,
1231 encoded_name[tail_index] = terminator;
1233 /* A single symbol may rename a package or object. */
1235 /* This should go away when we move entirely to new version.
1236 FIXME pnh 7/20/2007. */
1239 struct symbol *ren_sym =
1240 ada_find_renaming_symbol (syms[0].symbol, syms[0].block);
1242 if (ren_sym != NULL)
1243 syms[0].symbol = ren_sym;
1246 type_sym = select_possible_type_sym (syms);
1248 if (type_sym != NULL)
1249 renaming_sym = type_sym;
1250 else if (nsyms == 1)
1251 renaming_sym = syms[0].symbol;
1253 renaming_sym = NULL;
1255 switch (ada_parse_renaming (renaming_sym, &renaming,
1256 &renaming_len, &renaming_expr))
1258 case ADA_NOT_RENAMING:
1260 case ADA_PACKAGE_RENAMING:
1261 case ADA_EXCEPTION_RENAMING:
1262 case ADA_SUBPROGRAM_RENAMING:
1264 int alloc_len = renaming_len + name_len - tail_index + 1;
1266 = (char *) obstack_alloc (&temp_parse_space, alloc_len);
1267 strncpy (new_name, renaming, renaming_len);
1268 strcpy (new_name + renaming_len, encoded_name + tail_index);
1269 encoded_name = new_name;
1270 name_len = renaming_len + name_len - tail_index;
1271 goto TryAfterRenaming;
1273 case ADA_OBJECT_RENAMING:
1274 write_object_renaming (par_state, block, renaming, renaming_len,
1275 renaming_expr, MAX_RENAMING_CHAIN_LENGTH);
1276 write_selectors (par_state, encoded_name + tail_index);
1279 internal_error (__FILE__, __LINE__,
1280 _("impossible value from ada_parse_renaming"));
1283 if (type_sym != NULL)
1285 struct type *field_type;
1287 if (tail_index == name_len)
1288 return SYMBOL_TYPE (type_sym);
1290 /* We have some extraneous characters after the type name.
1291 If this is an expression "TYPE_NAME.FIELD0.[...].FIELDN",
1292 then try to get the type of FIELDN. */
1294 = get_symbol_field_type (type_sym, encoded_name + tail_index);
1295 if (field_type != NULL)
1298 error (_("Invalid attempt to select from type: \"%s\"."),
1301 else if (tail_index == name_len && nsyms == 0)
1303 struct type *type = find_primitive_type (par_state,
1312 write_var_from_sym (par_state, syms[0].block, syms[0].symbol);
1313 write_selectors (par_state, encoded_name + tail_index);
1316 else if (nsyms == 0)
1318 struct bound_minimal_symbol msym
1319 = ada_lookup_simple_minsym (encoded_name);
1320 if (msym.minsym != NULL)
1322 write_exp_msymbol (par_state, msym);
1323 /* Maybe cause error here rather than later? FIXME? */
1324 write_selectors (par_state, encoded_name + tail_index);
1328 if (tail_index == name_len
1329 && strncmp (encoded_name, "standard__",
1330 sizeof ("standard__") - 1) == 0)
1331 error (_("No definition of \"%s\" found."), name0.ptr);
1333 tail_index = chop_selector (encoded_name, tail_index);
1337 write_ambiguous_var (par_state, block, encoded_name,
1339 write_selectors (par_state, encoded_name + tail_index);
1344 if (!have_full_symbols () && !have_partial_symbols () && block == NULL)
1345 error (_("No symbol table is loaded. Use the \"file\" command."));
1346 if (block == expression_context_block)
1347 error (_("No definition of \"%s\" in current context."), name0.ptr);
1349 error (_("No definition of \"%s\" in specified context."), name0.ptr);
1354 error (_("Could not find renamed symbol \"%s\""), name0.ptr);
1358 /* Write a left side of a component association (e.g., NAME in NAME =>
1359 exp). If NAME has the form of a selected component, write it as an
1360 ordinary expression. If it is a simple variable that unambiguously
1361 corresponds to exactly one symbol that does not denote a type or an
1362 object renaming, also write it normally as an OP_VAR_VALUE.
1363 Otherwise, write it as an OP_NAME.
1365 Unfortunately, we don't know at this point whether NAME is supposed
1366 to denote a record component name or the value of an array index.
1367 Therefore, it is not appropriate to disambiguate an ambiguous name
1368 as we normally would, nor to replace a renaming with its referent.
1369 As a result, in the (one hopes) rare case that one writes an
1370 aggregate such as (R => 42) where R renames an object or is an
1371 ambiguous name, one must write instead ((R) => 42). */
1374 write_name_assoc (struct parser_state *par_state, struct stoken name)
1376 if (strchr (name.ptr, '.') == NULL)
1378 std::vector<struct block_symbol> syms;
1379 int nsyms = ada_lookup_symbol_list (name.ptr, expression_context_block,
1382 if (nsyms != 1 || SYMBOL_CLASS (syms[0].symbol) == LOC_TYPEDEF)
1383 write_exp_op_with_string (par_state, OP_NAME, name);
1385 write_var_from_sym (par_state, syms[0].block, syms[0].symbol);
1388 if (write_var_or_type (par_state, NULL, name) != NULL)
1389 error (_("Invalid use of type."));
1392 /* Convert the character literal whose ASCII value would be VAL to the
1393 appropriate value of type TYPE, if there is a translation.
1394 Otherwise return VAL. Hence, in an enumeration type ('A', 'B'),
1395 the literal 'A' (VAL == 65), returns 0. */
1398 convert_char_literal (struct type *type, LONGEST val)
1405 type = check_typedef (type);
1406 if (TYPE_CODE (type) != TYPE_CODE_ENUM)
1409 xsnprintf (name, sizeof (name), "QU%02x", (int) val);
1410 for (f = 0; f < TYPE_NFIELDS (type); f += 1)
1412 if (strcmp (name, TYPE_FIELD_NAME (type, f)) == 0)
1413 return TYPE_FIELD_ENUMVAL (type, f);
1418 static struct type *
1419 type_int (struct parser_state *par_state)
1421 return parse_type (par_state)->builtin_int;
1424 static struct type *
1425 type_long (struct parser_state *par_state)
1427 return parse_type (par_state)->builtin_long;
1430 static struct type *
1431 type_long_long (struct parser_state *par_state)
1433 return parse_type (par_state)->builtin_long_long;
1436 static struct type *
1437 type_long_double (struct parser_state *par_state)
1439 return parse_type (par_state)->builtin_long_double;
1442 static struct type *
1443 type_char (struct parser_state *par_state)
1445 return language_string_char_type (parse_language (par_state),
1446 parse_gdbarch (par_state));
1449 static struct type *
1450 type_boolean (struct parser_state *par_state)
1452 return parse_type (par_state)->builtin_bool;
1455 static struct type *
1456 type_system_address (struct parser_state *par_state)
1459 = language_lookup_primitive_type (parse_language (par_state),
1460 parse_gdbarch (par_state),
1462 return type != NULL ? type : parse_type (par_state)->builtin_data_ptr;
1466 _initialize_ada_exp (void)
1468 obstack_init (&temp_parse_space);