1 /* YACC parser for Ada expressions, for GDB.
2 Copyright (C) 1986-2015 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, etc),
54 as well as gratuitiously global symbol names, so we can have multiple
55 yacc generated parsers in gdb. These are only the variables
56 produced by yacc. If other parser generators (bison, byacc, etc) produce
57 additional global names that conflict at link time, then those parser
58 generators need to be fixed instead of adding those names to this list. */
60 /* NOTE: This is clumsy, especially since BISON and FLEX provide --prefix
61 options. I presume we are maintaining it to accommodate systems
62 without BISON? (PNH) */
64 #define yymaxdepth ada_maxdepth
65 /* ada_parse calls this after initialization */
66 #define yyparse ada_parse_internal
68 #define yyerror ada_error
69 #define yylval ada_lval
70 #define yychar ada_char
71 #define yydebug ada_debug
72 #define yypact ada_pact
79 #define yyexca ada_exca
80 #define yyerrflag ada_errflag
81 #define yynerrs ada_nerrs
85 #define yy_yys ada_yys
86 #define yystate ada_state
89 #define yy_yyv ada_yyv
91 #define yylloc ada_lloc
92 #define yyreds ada_reds /* With YYDEBUG defined */
93 #define yytoks ada_toks /* With YYDEBUG defined */
94 #define yyname ada_name /* With YYDEBUG defined */
95 #define yyrule ada_rule /* With YYDEBUG defined */
97 #define yysslim ada_yysslim
98 #define yyssp ada_yyssp
99 #define yystacksize ada_yystacksize
100 #define yyvs ada_yyvs
101 #define yyvsp ada_yyvsp
104 #define YYDEBUG 1 /* Default to yydebug support */
107 #define YYFPRINTF parser_fprintf
111 struct minimal_symbol *msym;
112 const struct block *block;
113 struct stoken stoken;
116 /* The state of the parser, used internally when we are parsing the
119 static struct parser_state *pstate = NULL;
121 static struct stoken empty_stoken = { "", 0 };
123 /* If expression is in the context of TYPE'(...), then TYPE, else
125 static struct type *type_qualifier;
129 static int yylex (void);
131 void yyerror (char *);
133 static void write_int (struct parser_state *, LONGEST, struct type *);
135 static void write_object_renaming (struct parser_state *,
136 const struct block *, const char *, int,
139 static struct type* write_var_or_type (struct parser_state *,
140 const struct block *, struct stoken);
142 static void write_name_assoc (struct parser_state *, struct stoken);
144 static void write_exp_op_with_string (struct parser_state *, enum exp_opcode,
147 static const struct block *block_lookup (const struct block *, const char *);
149 static LONGEST convert_char_literal (struct type *, LONGEST);
151 static void write_ambiguous_var (struct parser_state *,
152 const struct block *, char *, int);
154 static struct type *type_int (struct parser_state *);
156 static struct type *type_long (struct parser_state *);
158 static struct type *type_long_long (struct parser_state *);
160 static struct type *type_float (struct parser_state *);
162 static struct type *type_double (struct parser_state *);
164 static struct type *type_long_double (struct parser_state *);
166 static struct type *type_char (struct parser_state *);
168 static struct type *type_boolean (struct parser_state *);
170 static struct type *type_system_address (struct parser_state *);
187 const struct block *bval;
188 struct internalvar *ivar;
191 %type <lval> positional_list component_groups component_associations
192 %type <lval> aggregate_component_list
193 %type <tval> var_or_type
195 %token <typed_val> INT NULL_PTR CHARLIT
196 %token <typed_val_float> FLOAT
197 %token TRUEKEYWORD FALSEKEYWORD
199 %token <sval> STRING NAME DOT_ID
201 %type <lval> arglist tick_arglist
203 %type <tval> save_qualifier
207 /* Special type cases, put in to allow the parser to distinguish different
209 %token <sval> SPECIAL_VARIABLE
212 %left _AND_ OR XOR THEN ELSE
213 %left '=' NOTEQUAL '<' '>' LEQ GEQ IN DOTDOT
217 %left '*' '/' MOD REM
218 %right STARSTAR ABS NOT
220 /* Artificial token to give NAME => ... and NAME | priority over reducing
221 NAME to <primary> and to give <primary>' priority over reducing <primary>
227 %right TICK_ACCESS TICK_ADDRESS TICK_FIRST TICK_LAST TICK_LENGTH
228 %right TICK_MAX TICK_MIN TICK_MODULUS
229 %right TICK_POS TICK_RANGE TICK_SIZE TICK_TAG TICK_VAL
230 /* The following are right-associative only so that reductions at this
231 precedence have lower precedence than '.' and '('. The syntax still
232 forces a.b.c, e.g., to be LEFT-associated. */
233 %right '.' '(' '[' DOT_ID DOT_ALL
243 /* Expressions, including the sequencing operator. */
246 { write_exp_elt_opcode (pstate, BINOP_COMMA); }
247 | primary ASSIGN exp /* Extension for convenience */
248 { write_exp_elt_opcode (pstate, BINOP_ASSIGN); }
251 /* Expressions, not including the sequencing operator. */
252 primary : primary DOT_ALL
253 { write_exp_elt_opcode (pstate, UNOP_IND); }
256 primary : primary DOT_ID
257 { write_exp_op_with_string (pstate, STRUCTOP_STRUCT,
261 primary : primary '(' arglist ')'
263 write_exp_elt_opcode (pstate, OP_FUNCALL);
264 write_exp_elt_longcst (pstate, $3);
265 write_exp_elt_opcode (pstate, OP_FUNCALL);
267 | var_or_type '(' arglist ')'
272 error (_("Invalid conversion"));
273 write_exp_elt_opcode (pstate, UNOP_CAST);
274 write_exp_elt_type (pstate, $1);
275 write_exp_elt_opcode (pstate, UNOP_CAST);
279 write_exp_elt_opcode (pstate, OP_FUNCALL);
280 write_exp_elt_longcst (pstate, $3);
281 write_exp_elt_opcode (pstate, OP_FUNCALL);
286 primary : var_or_type '\'' save_qualifier { type_qualifier = $1; }
290 error (_("Type required for qualification"));
291 write_exp_elt_opcode (pstate, UNOP_QUAL);
292 write_exp_elt_type (pstate, $1);
293 write_exp_elt_opcode (pstate, UNOP_QUAL);
298 save_qualifier : { $$ = type_qualifier; }
302 primary '(' simple_exp DOTDOT simple_exp ')'
303 { write_exp_elt_opcode (pstate, TERNOP_SLICE); }
304 | var_or_type '(' simple_exp DOTDOT simple_exp ')'
306 write_exp_elt_opcode (pstate, TERNOP_SLICE);
308 error (_("Cannot slice a type"));
312 primary : '(' exp1 ')' { }
315 /* The following rule causes a conflict with the type conversion
317 To get around it, we give '(' higher priority and add bridge rules for
318 var_or_type (exp, exp, ...)
319 var_or_type (exp .. exp)
320 We also have the action for var_or_type(exp) generate a function call
321 when the first symbol does not denote a type. */
323 primary : var_or_type %prec VAR
326 write_exp_elt_opcode (pstate, OP_TYPE);
327 write_exp_elt_type (pstate, $1);
328 write_exp_elt_opcode (pstate, OP_TYPE);
333 primary : SPECIAL_VARIABLE /* Various GDB extensions */
334 { write_dollar_variable (pstate, $1); }
343 simple_exp : '-' simple_exp %prec UNARY
344 { write_exp_elt_opcode (pstate, UNOP_NEG); }
347 simple_exp : '+' simple_exp %prec UNARY
348 { write_exp_elt_opcode (pstate, UNOP_PLUS); }
351 simple_exp : NOT simple_exp %prec UNARY
352 { write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT); }
355 simple_exp : ABS simple_exp %prec UNARY
356 { write_exp_elt_opcode (pstate, UNOP_ABS); }
359 arglist : { $$ = 0; }
368 | arglist ',' NAME ARROW exp
372 primary : '{' var_or_type '}' primary %prec '.'
376 error (_("Type required within braces in coercion"));
377 write_exp_elt_opcode (pstate, UNOP_MEMVAL);
378 write_exp_elt_type (pstate, $2);
379 write_exp_elt_opcode (pstate, UNOP_MEMVAL);
383 /* Binary operators in order of decreasing precedence. */
385 simple_exp : simple_exp STARSTAR simple_exp
386 { write_exp_elt_opcode (pstate, BINOP_EXP); }
389 simple_exp : simple_exp '*' simple_exp
390 { write_exp_elt_opcode (pstate, BINOP_MUL); }
393 simple_exp : simple_exp '/' simple_exp
394 { write_exp_elt_opcode (pstate, BINOP_DIV); }
397 simple_exp : simple_exp REM simple_exp /* May need to be fixed to give correct Ada REM */
398 { write_exp_elt_opcode (pstate, BINOP_REM); }
401 simple_exp : simple_exp MOD simple_exp
402 { write_exp_elt_opcode (pstate, BINOP_MOD); }
405 simple_exp : simple_exp '@' simple_exp /* GDB extension */
406 { write_exp_elt_opcode (pstate, BINOP_REPEAT); }
409 simple_exp : simple_exp '+' simple_exp
410 { write_exp_elt_opcode (pstate, BINOP_ADD); }
413 simple_exp : simple_exp '&' simple_exp
414 { write_exp_elt_opcode (pstate, BINOP_CONCAT); }
417 simple_exp : simple_exp '-' simple_exp
418 { write_exp_elt_opcode (pstate, BINOP_SUB); }
421 relation : simple_exp
424 relation : simple_exp '=' simple_exp
425 { write_exp_elt_opcode (pstate, BINOP_EQUAL); }
428 relation : simple_exp NOTEQUAL simple_exp
429 { write_exp_elt_opcode (pstate, BINOP_NOTEQUAL); }
432 relation : simple_exp LEQ simple_exp
433 { write_exp_elt_opcode (pstate, BINOP_LEQ); }
436 relation : simple_exp IN simple_exp DOTDOT simple_exp
437 { write_exp_elt_opcode (pstate, TERNOP_IN_RANGE); }
438 | simple_exp IN primary TICK_RANGE tick_arglist
439 { write_exp_elt_opcode (pstate, BINOP_IN_BOUNDS);
440 write_exp_elt_longcst (pstate, (LONGEST) $5);
441 write_exp_elt_opcode (pstate, BINOP_IN_BOUNDS);
443 | simple_exp IN var_or_type %prec TICK_ACCESS
446 error (_("Right operand of 'in' must be type"));
447 write_exp_elt_opcode (pstate, UNOP_IN_RANGE);
448 write_exp_elt_type (pstate, $3);
449 write_exp_elt_opcode (pstate, UNOP_IN_RANGE);
451 | simple_exp NOT IN simple_exp DOTDOT simple_exp
452 { write_exp_elt_opcode (pstate, TERNOP_IN_RANGE);
453 write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT);
455 | simple_exp NOT IN primary TICK_RANGE tick_arglist
456 { write_exp_elt_opcode (pstate, BINOP_IN_BOUNDS);
457 write_exp_elt_longcst (pstate, (LONGEST) $6);
458 write_exp_elt_opcode (pstate, BINOP_IN_BOUNDS);
459 write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT);
461 | simple_exp NOT IN var_or_type %prec TICK_ACCESS
464 error (_("Right operand of 'in' must be type"));
465 write_exp_elt_opcode (pstate, UNOP_IN_RANGE);
466 write_exp_elt_type (pstate, $4);
467 write_exp_elt_opcode (pstate, UNOP_IN_RANGE);
468 write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT);
472 relation : simple_exp GEQ simple_exp
473 { write_exp_elt_opcode (pstate, BINOP_GEQ); }
476 relation : simple_exp '<' simple_exp
477 { write_exp_elt_opcode (pstate, BINOP_LESS); }
480 relation : simple_exp '>' simple_exp
481 { write_exp_elt_opcode (pstate, BINOP_GTR); }
493 relation _AND_ relation
494 { write_exp_elt_opcode (pstate, BINOP_BITWISE_AND); }
495 | and_exp _AND_ relation
496 { write_exp_elt_opcode (pstate, BINOP_BITWISE_AND); }
500 relation _AND_ THEN relation
501 { write_exp_elt_opcode (pstate, BINOP_LOGICAL_AND); }
502 | and_then_exp _AND_ THEN relation
503 { write_exp_elt_opcode (pstate, BINOP_LOGICAL_AND); }
508 { write_exp_elt_opcode (pstate, BINOP_BITWISE_IOR); }
510 { write_exp_elt_opcode (pstate, BINOP_BITWISE_IOR); }
514 relation OR ELSE relation
515 { write_exp_elt_opcode (pstate, BINOP_LOGICAL_OR); }
516 | or_else_exp OR ELSE relation
517 { write_exp_elt_opcode (pstate, BINOP_LOGICAL_OR); }
520 xor_exp : relation XOR relation
521 { write_exp_elt_opcode (pstate, BINOP_BITWISE_XOR); }
522 | xor_exp XOR relation
523 { write_exp_elt_opcode (pstate, BINOP_BITWISE_XOR); }
526 /* Primaries can denote types (OP_TYPE). In cases such as
527 primary TICK_ADDRESS, where a type would be invalid, it will be
528 caught when evaluate_subexp in ada-lang.c tries to evaluate the
529 primary, expecting a value. Precedence rules resolve the ambiguity
530 in NAME TICK_ACCESS in favor of shifting to form a var_or_type. A
531 construct such as aType'access'access will again cause an error when
532 aType'access evaluates to a type that evaluate_subexp attempts to
534 primary : primary TICK_ACCESS
535 { write_exp_elt_opcode (pstate, UNOP_ADDR); }
536 | primary TICK_ADDRESS
537 { write_exp_elt_opcode (pstate, UNOP_ADDR);
538 write_exp_elt_opcode (pstate, UNOP_CAST);
539 write_exp_elt_type (pstate,
540 type_system_address (pstate));
541 write_exp_elt_opcode (pstate, UNOP_CAST);
543 | primary TICK_FIRST tick_arglist
544 { write_int (pstate, $3, type_int (pstate));
545 write_exp_elt_opcode (pstate, OP_ATR_FIRST); }
546 | primary TICK_LAST tick_arglist
547 { write_int (pstate, $3, type_int (pstate));
548 write_exp_elt_opcode (pstate, OP_ATR_LAST); }
549 | primary TICK_LENGTH tick_arglist
550 { write_int (pstate, $3, type_int (pstate));
551 write_exp_elt_opcode (pstate, OP_ATR_LENGTH); }
553 { write_exp_elt_opcode (pstate, OP_ATR_SIZE); }
555 { write_exp_elt_opcode (pstate, OP_ATR_TAG); }
556 | opt_type_prefix TICK_MIN '(' exp ',' exp ')'
557 { write_exp_elt_opcode (pstate, OP_ATR_MIN); }
558 | opt_type_prefix TICK_MAX '(' exp ',' exp ')'
559 { write_exp_elt_opcode (pstate, OP_ATR_MAX); }
560 | opt_type_prefix TICK_POS '(' exp ')'
561 { write_exp_elt_opcode (pstate, OP_ATR_POS); }
562 | type_prefix TICK_VAL '(' exp ')'
563 { write_exp_elt_opcode (pstate, OP_ATR_VAL); }
564 | type_prefix TICK_MODULUS
565 { write_exp_elt_opcode (pstate, OP_ATR_MODULUS); }
568 tick_arglist : %prec '('
578 error (_("Prefix must be type"));
579 write_exp_elt_opcode (pstate, OP_TYPE);
580 write_exp_elt_type (pstate, $1);
581 write_exp_elt_opcode (pstate, OP_TYPE); }
587 { write_exp_elt_opcode (pstate, OP_TYPE);
588 write_exp_elt_type (pstate,
589 parse_type (pstate)->builtin_void);
590 write_exp_elt_opcode (pstate, OP_TYPE); }
595 { write_int (pstate, (LONGEST) $1.val, $1.type); }
600 convert_char_literal (type_qualifier, $1.val),
601 (type_qualifier == NULL)
602 ? $1.type : type_qualifier);
607 { write_exp_elt_opcode (pstate, OP_DOUBLE);
608 write_exp_elt_type (pstate, $1.type);
609 write_exp_elt_dblcst (pstate, $1.dval);
610 write_exp_elt_opcode (pstate, OP_DOUBLE);
615 { write_int (pstate, 0, type_int (pstate)); }
620 write_exp_op_with_string (pstate, OP_STRING, $1);
624 primary : TRUEKEYWORD
625 { write_int (pstate, 1, type_boolean (pstate)); }
627 { write_int (pstate, 0, type_boolean (pstate)); }
631 { error (_("NEW not implemented.")); }
634 var_or_type: NAME %prec VAR
635 { $$ = write_var_or_type (pstate, NULL, $1); }
636 | block NAME %prec VAR
637 { $$ = write_var_or_type (pstate, $1, $2); }
640 $$ = write_var_or_type (pstate, NULL, $1);
642 write_exp_elt_opcode (pstate, UNOP_ADDR);
644 $$ = lookup_pointer_type ($$);
646 | block NAME TICK_ACCESS
648 $$ = write_var_or_type (pstate, $1, $2);
650 write_exp_elt_opcode (pstate, UNOP_ADDR);
652 $$ = lookup_pointer_type ($$);
657 block : NAME COLONCOLON
658 { $$ = block_lookup (NULL, $1.ptr); }
659 | block NAME COLONCOLON
660 { $$ = block_lookup ($1, $2.ptr); }
664 '(' aggregate_component_list ')'
666 write_exp_elt_opcode (pstate, OP_AGGREGATE);
667 write_exp_elt_longcst (pstate, $2);
668 write_exp_elt_opcode (pstate, OP_AGGREGATE);
672 aggregate_component_list :
673 component_groups { $$ = $1; }
674 | positional_list exp
675 { write_exp_elt_opcode (pstate, OP_POSITIONAL);
676 write_exp_elt_longcst (pstate, $1);
677 write_exp_elt_opcode (pstate, OP_POSITIONAL);
680 | positional_list component_groups
686 { write_exp_elt_opcode (pstate, OP_POSITIONAL);
687 write_exp_elt_longcst (pstate, 0);
688 write_exp_elt_opcode (pstate, OP_POSITIONAL);
691 | positional_list exp ','
692 { write_exp_elt_opcode (pstate, OP_POSITIONAL);
693 write_exp_elt_longcst (pstate, $1);
694 write_exp_elt_opcode (pstate, OP_POSITIONAL);
701 | component_group { $$ = 1; }
702 | component_group ',' component_groups
706 others : OTHERS ARROW exp
707 { write_exp_elt_opcode (pstate, OP_OTHERS); }
711 component_associations
713 write_exp_elt_opcode (pstate, OP_CHOICES);
714 write_exp_elt_longcst (pstate, $1);
715 write_exp_elt_opcode (pstate, OP_CHOICES);
719 /* We use this somewhat obscure definition in order to handle NAME => and
720 NAME | differently from exp => and exp |. ARROW and '|' have a precedence
721 above that of the reduction of NAME to var_or_type. By delaying
722 decisions until after the => or '|', we convert the ambiguity to a
723 resolved shift/reduce conflict. */
724 component_associations :
726 { write_name_assoc (pstate, $1); }
728 | simple_exp ARROW exp
730 | simple_exp DOTDOT simple_exp ARROW
731 { write_exp_elt_opcode (pstate, OP_DISCRETE_RANGE);
732 write_exp_op_with_string (pstate, OP_NAME,
737 { write_name_assoc (pstate, $1); }
738 component_associations { $$ = $4 + 1; }
740 component_associations { $$ = $3 + 1; }
741 | simple_exp DOTDOT simple_exp '|'
742 { write_exp_elt_opcode (pstate, OP_DISCRETE_RANGE); }
743 component_associations { $$ = $6 + 1; }
746 /* Some extensions borrowed from C, for the benefit of those who find they
747 can't get used to Ada notation in GDB. */
749 primary : '*' primary %prec '.'
750 { write_exp_elt_opcode (pstate, UNOP_IND); }
751 | '&' primary %prec '.'
752 { write_exp_elt_opcode (pstate, UNOP_ADDR); }
753 | primary '[' exp ']'
754 { write_exp_elt_opcode (pstate, BINOP_SUBSCRIPT); }
759 /* yylex defined in ada-lex.c: Reads one token, getting characters */
760 /* through lexptr. */
762 /* Remap normal flex interface names (yylex) as well as gratuitiously */
763 /* global symbol names, so we can have multiple flex-generated parsers */
766 /* (See note above on previous definitions for YACC.) */
768 #define yy_create_buffer ada_yy_create_buffer
769 #define yy_delete_buffer ada_yy_delete_buffer
770 #define yy_init_buffer ada_yy_init_buffer
771 #define yy_load_buffer_state ada_yy_load_buffer_state
772 #define yy_switch_to_buffer ada_yy_switch_to_buffer
773 #define yyrestart ada_yyrestart
774 #define yytext ada_yytext
775 #define yywrap ada_yywrap
777 static struct obstack temp_parse_space;
779 /* The following kludge was found necessary to prevent conflicts between */
780 /* defs.h and non-standard stdlib.h files. */
781 #define qsort __qsort__dummy
785 ada_parse (struct parser_state *par_state)
788 struct cleanup *c = make_cleanup_clear_parser_state (&pstate);
790 /* Setting up the parser state. */
791 gdb_assert (par_state != NULL);
794 lexer_init (yyin); /* (Re-)initialize lexer. */
795 type_qualifier = NULL;
796 obstack_free (&temp_parse_space, NULL);
797 obstack_init (&temp_parse_space);
807 error (_("Error in expression, near `%s'."), lexptr);
810 /* Emit expression to access an instance of SYM, in block BLOCK (if
811 * non-NULL), and with :: qualification ORIG_LEFT_CONTEXT. */
813 write_var_from_sym (struct parser_state *par_state,
814 const struct block *orig_left_context,
815 const struct block *block,
818 if (orig_left_context == NULL && symbol_read_needs_frame (sym))
820 if (innermost_block == 0
821 || contained_in (block, innermost_block))
822 innermost_block = block;
825 write_exp_elt_opcode (par_state, OP_VAR_VALUE);
826 write_exp_elt_block (par_state, block);
827 write_exp_elt_sym (par_state, sym);
828 write_exp_elt_opcode (par_state, OP_VAR_VALUE);
831 /* Write integer or boolean constant ARG of type TYPE. */
834 write_int (struct parser_state *par_state, LONGEST arg, struct type *type)
836 write_exp_elt_opcode (par_state, OP_LONG);
837 write_exp_elt_type (par_state, type);
838 write_exp_elt_longcst (par_state, arg);
839 write_exp_elt_opcode (par_state, OP_LONG);
842 /* Write an OPCODE, string, OPCODE sequence to the current expression. */
844 write_exp_op_with_string (struct parser_state *par_state,
845 enum exp_opcode opcode, struct stoken token)
847 write_exp_elt_opcode (par_state, opcode);
848 write_exp_string (par_state, token);
849 write_exp_elt_opcode (par_state, opcode);
852 /* Emit expression corresponding to the renamed object named
853 * designated by RENAMED_ENTITY[0 .. RENAMED_ENTITY_LEN-1] in the
854 * context of ORIG_LEFT_CONTEXT, to which is applied the operations
855 * encoded by RENAMING_EXPR. MAX_DEPTH is the maximum number of
856 * cascaded renamings to allow. If ORIG_LEFT_CONTEXT is null, it
857 * defaults to the currently selected block. ORIG_SYMBOL is the
858 * symbol that originally encoded the renaming. It is needed only
859 * because its prefix also qualifies any index variables used to index
860 * or slice an array. It should not be necessary once we go to the
861 * new encoding entirely (FIXME pnh 7/20/2007). */
864 write_object_renaming (struct parser_state *par_state,
865 const struct block *orig_left_context,
866 const char *renamed_entity, int renamed_entity_len,
867 const char *renaming_expr, int max_depth)
870 enum { SIMPLE_INDEX, LOWER_BOUND, UPPER_BOUND } slice_state;
871 struct block_symbol sym_info;
874 error (_("Could not find renamed symbol"));
876 if (orig_left_context == NULL)
877 orig_left_context = get_selected_block (NULL);
879 name = obstack_copy0 (&temp_parse_space, renamed_entity, renamed_entity_len);
880 ada_lookup_encoded_symbol (name, orig_left_context, VAR_DOMAIN, &sym_info);
881 if (sym_info.symbol == NULL)
882 error (_("Could not find renamed variable: %s"), ada_decode (name));
883 else if (SYMBOL_CLASS (sym_info.symbol) == LOC_TYPEDEF)
884 /* We have a renaming of an old-style renaming symbol. Don't
885 trust the block information. */
886 sym_info.block = orig_left_context;
889 const char *inner_renamed_entity;
890 int inner_renamed_entity_len;
891 const char *inner_renaming_expr;
893 switch (ada_parse_renaming (sym_info.symbol, &inner_renamed_entity,
894 &inner_renamed_entity_len,
895 &inner_renaming_expr))
897 case ADA_NOT_RENAMING:
898 write_var_from_sym (par_state, orig_left_context, sym_info.block,
901 case ADA_OBJECT_RENAMING:
902 write_object_renaming (par_state, sym_info.block,
903 inner_renamed_entity, inner_renamed_entity_len,
904 inner_renaming_expr, max_depth - 1);
911 slice_state = SIMPLE_INDEX;
912 while (*renaming_expr == 'X')
916 switch (*renaming_expr) {
919 write_exp_elt_opcode (par_state, UNOP_IND);
922 slice_state = LOWER_BOUND;
926 if (isdigit (*renaming_expr))
929 long val = strtol (renaming_expr, &next, 10);
930 if (next == renaming_expr)
932 renaming_expr = next;
933 write_exp_elt_opcode (par_state, OP_LONG);
934 write_exp_elt_type (par_state, type_int (par_state));
935 write_exp_elt_longcst (par_state, (LONGEST) val);
936 write_exp_elt_opcode (par_state, OP_LONG);
942 struct block_symbol index_sym_info;
944 end = strchr (renaming_expr, 'X');
946 end = renaming_expr + strlen (renaming_expr);
949 obstack_copy0 (&temp_parse_space, renaming_expr,
950 end - renaming_expr);
953 ada_lookup_encoded_symbol (index_name, NULL, VAR_DOMAIN,
955 if (index_sym_info.symbol == NULL)
956 error (_("Could not find %s"), index_name);
957 else if (SYMBOL_CLASS (index_sym_info.symbol) == LOC_TYPEDEF)
958 /* Index is an old-style renaming symbol. */
959 index_sym_info.block = orig_left_context;
960 write_var_from_sym (par_state, NULL, index_sym_info.block,
961 index_sym_info.symbol);
963 if (slice_state == SIMPLE_INDEX)
965 write_exp_elt_opcode (par_state, OP_FUNCALL);
966 write_exp_elt_longcst (par_state, (LONGEST) 1);
967 write_exp_elt_opcode (par_state, OP_FUNCALL);
969 else if (slice_state == LOWER_BOUND)
970 slice_state = UPPER_BOUND;
971 else if (slice_state == UPPER_BOUND)
973 write_exp_elt_opcode (par_state, TERNOP_SLICE);
974 slice_state = SIMPLE_INDEX;
980 struct stoken field_name;
986 if (slice_state != SIMPLE_INDEX)
988 end = strchr (renaming_expr, 'X');
990 end = renaming_expr + strlen (renaming_expr);
991 field_name.length = end - renaming_expr;
992 buf = malloc (end - renaming_expr + 1);
993 field_name.ptr = buf;
994 strncpy (buf, renaming_expr, end - renaming_expr);
995 buf[end - renaming_expr] = '\000';
997 write_exp_op_with_string (par_state, STRUCTOP_STRUCT, field_name);
1005 if (slice_state == SIMPLE_INDEX)
1009 error (_("Internal error in encoding of renaming declaration"));
1012 static const struct block*
1013 block_lookup (const struct block *context, const char *raw_name)
1016 struct block_symbol *syms;
1018 struct symtab *symtab;
1020 if (raw_name[0] == '\'')
1026 name = ada_encode (raw_name);
1028 nsyms = ada_lookup_symbol_list (name, context, VAR_DOMAIN, &syms);
1030 && (nsyms == 0 || SYMBOL_CLASS (syms[0].symbol) != LOC_BLOCK))
1031 symtab = lookup_symtab (name);
1036 return BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (symtab), STATIC_BLOCK);
1037 else if (nsyms == 0 || SYMBOL_CLASS (syms[0].symbol) != LOC_BLOCK)
1039 if (context == NULL)
1040 error (_("No file or function \"%s\"."), raw_name);
1042 error (_("No function \"%s\" in specified context."), raw_name);
1047 warning (_("Function name \"%s\" ambiguous here"), raw_name);
1048 return SYMBOL_BLOCK_VALUE (syms[0].symbol);
1052 static struct symbol*
1053 select_possible_type_sym (struct block_symbol *syms, int nsyms)
1056 int preferred_index;
1057 struct type *preferred_type;
1059 preferred_index = -1; preferred_type = NULL;
1060 for (i = 0; i < nsyms; i += 1)
1061 switch (SYMBOL_CLASS (syms[i].symbol))
1064 if (ada_prefer_type (SYMBOL_TYPE (syms[i].symbol), preferred_type))
1066 preferred_index = i;
1067 preferred_type = SYMBOL_TYPE (syms[i].symbol);
1073 case LOC_REGPARM_ADDR:
1080 if (preferred_type == NULL)
1082 return syms[preferred_index].symbol;
1086 find_primitive_type (struct parser_state *par_state, char *name)
1089 type = language_lookup_primitive_type (parse_language (par_state),
1090 parse_gdbarch (par_state),
1092 if (type == NULL && strcmp ("system__address", name) == 0)
1093 type = type_system_address (par_state);
1097 /* Check to see if we have a regular definition of this
1098 type that just didn't happen to have been read yet. */
1100 char *expanded_name =
1101 (char *) alloca (strlen (name) + sizeof ("standard__"));
1102 strcpy (expanded_name, "standard__");
1103 strcat (expanded_name, name);
1104 sym = ada_lookup_symbol (expanded_name, NULL, VAR_DOMAIN, NULL).symbol;
1105 if (sym != NULL && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
1106 type = SYMBOL_TYPE (sym);
1113 chop_selector (char *name, int end)
1116 for (i = end - 1; i > 0; i -= 1)
1117 if (name[i] == '.' || (name[i] == '_' && name[i+1] == '_'))
1122 /* If NAME is a string beginning with a separator (either '__', or
1123 '.'), chop this separator and return the result; else, return
1127 chop_separator (char *name)
1132 if (name[0] == '_' && name[1] == '_')
1138 /* Given that SELS is a string of the form (<sep><identifier>)*, where
1139 <sep> is '__' or '.', write the indicated sequence of
1140 STRUCTOP_STRUCT expression operators. */
1142 write_selectors (struct parser_state *par_state, char *sels)
1144 while (*sels != '\0')
1146 struct stoken field_name;
1147 char *p = chop_separator (sels);
1149 while (*sels != '\0' && *sels != '.'
1150 && (sels[0] != '_' || sels[1] != '_'))
1152 field_name.length = sels - p;
1154 write_exp_op_with_string (par_state, STRUCTOP_STRUCT, field_name);
1158 /* Write a variable access (OP_VAR_VALUE) to ambiguous encoded name
1159 NAME[0..LEN-1], in block context BLOCK, to be resolved later. Writes
1160 a temporary symbol that is valid until the next call to ada_parse.
1163 write_ambiguous_var (struct parser_state *par_state,
1164 const struct block *block, char *name, int len)
1166 struct symbol *sym = XOBNEW (&temp_parse_space, struct symbol);
1168 memset (sym, 0, sizeof (struct symbol));
1169 SYMBOL_DOMAIN (sym) = UNDEF_DOMAIN;
1170 SYMBOL_LINKAGE_NAME (sym) = obstack_copy0 (&temp_parse_space, name, len);
1171 SYMBOL_LANGUAGE (sym) = language_ada;
1173 write_exp_elt_opcode (par_state, OP_VAR_VALUE);
1174 write_exp_elt_block (par_state, block);
1175 write_exp_elt_sym (par_state, sym);
1176 write_exp_elt_opcode (par_state, OP_VAR_VALUE);
1179 /* A convenient wrapper around ada_get_field_index that takes
1180 a non NUL-terminated FIELD_NAME0 and a FIELD_NAME_LEN instead
1181 of a NUL-terminated field name. */
1184 ada_nget_field_index (const struct type *type, const char *field_name0,
1185 int field_name_len, int maybe_missing)
1187 char *field_name = alloca ((field_name_len + 1) * sizeof (char));
1189 strncpy (field_name, field_name0, field_name_len);
1190 field_name[field_name_len] = '\0';
1191 return ada_get_field_index (type, field_name, maybe_missing);
1194 /* If encoded_field_name is the name of a field inside symbol SYM,
1195 then return the type of that field. Otherwise, return NULL.
1197 This function is actually recursive, so if ENCODED_FIELD_NAME
1198 doesn't match one of the fields of our symbol, then try to see
1199 if ENCODED_FIELD_NAME could not be a succession of field names
1200 (in other words, the user entered an expression of the form
1201 TYPE_NAME.FIELD1.FIELD2.FIELD3), in which case we evaluate
1202 each field name sequentially to obtain the desired field type.
1203 In case of failure, we return NULL. */
1205 static struct type *
1206 get_symbol_field_type (struct symbol *sym, char *encoded_field_name)
1208 char *field_name = encoded_field_name;
1209 char *subfield_name;
1210 struct type *type = SYMBOL_TYPE (sym);
1213 if (type == NULL || field_name == NULL)
1215 type = check_typedef (type);
1217 while (field_name[0] != '\0')
1219 field_name = chop_separator (field_name);
1221 fieldno = ada_get_field_index (type, field_name, 1);
1223 return TYPE_FIELD_TYPE (type, fieldno);
1225 subfield_name = field_name;
1226 while (*subfield_name != '\0' && *subfield_name != '.'
1227 && (subfield_name[0] != '_' || subfield_name[1] != '_'))
1230 if (subfield_name[0] == '\0')
1233 fieldno = ada_nget_field_index (type, field_name,
1234 subfield_name - field_name, 1);
1238 type = TYPE_FIELD_TYPE (type, fieldno);
1239 field_name = subfield_name;
1245 /* Look up NAME0 (an unencoded identifier or dotted name) in BLOCK (or
1246 expression_block_context if NULL). If it denotes a type, return
1247 that type. Otherwise, write expression code to evaluate it as an
1248 object and return NULL. In this second case, NAME0 will, in general,
1249 have the form <name>(.<selector_name>)*, where <name> is an object
1250 or renaming encoded in the debugging data. Calls error if no
1251 prefix <name> matches a name in the debugging data (i.e., matches
1252 either a complete name or, as a wild-card match, the final
1256 write_var_or_type (struct parser_state *par_state,
1257 const struct block *block, struct stoken name0)
1264 block = expression_context_block;
1266 encoded_name = ada_encode (name0.ptr);
1267 name_len = strlen (encoded_name);
1268 encoded_name = obstack_copy0 (&temp_parse_space, encoded_name, name_len);
1269 for (depth = 0; depth < MAX_RENAMING_CHAIN_LENGTH; depth += 1)
1273 tail_index = name_len;
1274 while (tail_index > 0)
1277 struct block_symbol *syms;
1278 struct symbol *type_sym;
1279 struct symbol *renaming_sym;
1280 const char* renaming;
1282 const char* renaming_expr;
1283 int terminator = encoded_name[tail_index];
1285 encoded_name[tail_index] = '\0';
1286 nsyms = ada_lookup_symbol_list (encoded_name, block,
1288 encoded_name[tail_index] = terminator;
1290 /* A single symbol may rename a package or object. */
1292 /* This should go away when we move entirely to new version.
1293 FIXME pnh 7/20/2007. */
1296 struct symbol *ren_sym =
1297 ada_find_renaming_symbol (syms[0].symbol, syms[0].block);
1299 if (ren_sym != NULL)
1300 syms[0].symbol = ren_sym;
1303 type_sym = select_possible_type_sym (syms, nsyms);
1305 if (type_sym != NULL)
1306 renaming_sym = type_sym;
1307 else if (nsyms == 1)
1308 renaming_sym = syms[0].symbol;
1310 renaming_sym = NULL;
1312 switch (ada_parse_renaming (renaming_sym, &renaming,
1313 &renaming_len, &renaming_expr))
1315 case ADA_NOT_RENAMING:
1317 case ADA_PACKAGE_RENAMING:
1318 case ADA_EXCEPTION_RENAMING:
1319 case ADA_SUBPROGRAM_RENAMING:
1322 = obstack_alloc (&temp_parse_space,
1323 renaming_len + name_len - tail_index + 1);
1324 strncpy (new_name, renaming, renaming_len);
1325 strcpy (new_name + renaming_len, encoded_name + tail_index);
1326 encoded_name = new_name;
1327 name_len = renaming_len + name_len - tail_index;
1328 goto TryAfterRenaming;
1330 case ADA_OBJECT_RENAMING:
1331 write_object_renaming (par_state, block, renaming, renaming_len,
1332 renaming_expr, MAX_RENAMING_CHAIN_LENGTH);
1333 write_selectors (par_state, encoded_name + tail_index);
1336 internal_error (__FILE__, __LINE__,
1337 _("impossible value from ada_parse_renaming"));
1340 if (type_sym != NULL)
1342 struct type *field_type;
1344 if (tail_index == name_len)
1345 return SYMBOL_TYPE (type_sym);
1347 /* We have some extraneous characters after the type name.
1348 If this is an expression "TYPE_NAME.FIELD0.[...].FIELDN",
1349 then try to get the type of FIELDN. */
1351 = get_symbol_field_type (type_sym, encoded_name + tail_index);
1352 if (field_type != NULL)
1355 error (_("Invalid attempt to select from type: \"%s\"."),
1358 else if (tail_index == name_len && nsyms == 0)
1360 struct type *type = find_primitive_type (par_state,
1369 write_var_from_sym (par_state, block, syms[0].block,
1371 write_selectors (par_state, encoded_name + tail_index);
1374 else if (nsyms == 0)
1376 struct bound_minimal_symbol msym
1377 = ada_lookup_simple_minsym (encoded_name);
1378 if (msym.minsym != NULL)
1380 write_exp_msymbol (par_state, msym);
1381 /* Maybe cause error here rather than later? FIXME? */
1382 write_selectors (par_state, encoded_name + tail_index);
1386 if (tail_index == name_len
1387 && strncmp (encoded_name, "standard__",
1388 sizeof ("standard__") - 1) == 0)
1389 error (_("No definition of \"%s\" found."), name0.ptr);
1391 tail_index = chop_selector (encoded_name, tail_index);
1395 write_ambiguous_var (par_state, block, encoded_name,
1397 write_selectors (par_state, encoded_name + tail_index);
1402 if (!have_full_symbols () && !have_partial_symbols () && block == NULL)
1403 error (_("No symbol table is loaded. Use the \"file\" command."));
1404 if (block == expression_context_block)
1405 error (_("No definition of \"%s\" in current context."), name0.ptr);
1407 error (_("No definition of \"%s\" in specified context."), name0.ptr);
1412 error (_("Could not find renamed symbol \"%s\""), name0.ptr);
1416 /* Write a left side of a component association (e.g., NAME in NAME =>
1417 exp). If NAME has the form of a selected component, write it as an
1418 ordinary expression. If it is a simple variable that unambiguously
1419 corresponds to exactly one symbol that does not denote a type or an
1420 object renaming, also write it normally as an OP_VAR_VALUE.
1421 Otherwise, write it as an OP_NAME.
1423 Unfortunately, we don't know at this point whether NAME is supposed
1424 to denote a record component name or the value of an array index.
1425 Therefore, it is not appropriate to disambiguate an ambiguous name
1426 as we normally would, nor to replace a renaming with its referent.
1427 As a result, in the (one hopes) rare case that one writes an
1428 aggregate such as (R => 42) where R renames an object or is an
1429 ambiguous name, one must write instead ((R) => 42). */
1432 write_name_assoc (struct parser_state *par_state, struct stoken name)
1434 if (strchr (name.ptr, '.') == NULL)
1436 struct block_symbol *syms;
1437 int nsyms = ada_lookup_symbol_list (name.ptr, expression_context_block,
1440 if (nsyms != 1 || SYMBOL_CLASS (syms[0].symbol) == LOC_TYPEDEF)
1441 write_exp_op_with_string (par_state, OP_NAME, name);
1443 write_var_from_sym (par_state, NULL, syms[0].block, syms[0].symbol);
1446 if (write_var_or_type (par_state, NULL, name) != NULL)
1447 error (_("Invalid use of type."));
1450 /* Convert the character literal whose ASCII value would be VAL to the
1451 appropriate value of type TYPE, if there is a translation.
1452 Otherwise return VAL. Hence, in an enumeration type ('A', 'B'),
1453 the literal 'A' (VAL == 65), returns 0. */
1456 convert_char_literal (struct type *type, LONGEST val)
1463 type = check_typedef (type);
1464 if (TYPE_CODE (type) != TYPE_CODE_ENUM)
1467 xsnprintf (name, sizeof (name), "QU%02x", (int) val);
1468 for (f = 0; f < TYPE_NFIELDS (type); f += 1)
1470 if (strcmp (name, TYPE_FIELD_NAME (type, f)) == 0)
1471 return TYPE_FIELD_ENUMVAL (type, f);
1476 static struct type *
1477 type_int (struct parser_state *par_state)
1479 return parse_type (par_state)->builtin_int;
1482 static struct type *
1483 type_long (struct parser_state *par_state)
1485 return parse_type (par_state)->builtin_long;
1488 static struct type *
1489 type_long_long (struct parser_state *par_state)
1491 return parse_type (par_state)->builtin_long_long;
1494 static struct type *
1495 type_float (struct parser_state *par_state)
1497 return parse_type (par_state)->builtin_float;
1500 static struct type *
1501 type_double (struct parser_state *par_state)
1503 return parse_type (par_state)->builtin_double;
1506 static struct type *
1507 type_long_double (struct parser_state *par_state)
1509 return parse_type (par_state)->builtin_long_double;
1512 static struct type *
1513 type_char (struct parser_state *par_state)
1515 return language_string_char_type (parse_language (par_state),
1516 parse_gdbarch (par_state));
1519 static struct type *
1520 type_boolean (struct parser_state *par_state)
1522 return parse_type (par_state)->builtin_bool;
1525 static struct type *
1526 type_system_address (struct parser_state *par_state)
1529 = language_lookup_primitive_type (parse_language (par_state),
1530 parse_gdbarch (par_state),
1532 return type != NULL ? type : parse_type (par_state)->builtin_data_ptr;
1535 /* Provide a prototype to silence -Wmissing-prototypes. */
1536 extern initialize_file_ftype _initialize_ada_exp;
1539 _initialize_ada_exp (void)
1541 obstack_init (&temp_parse_space);