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1495 lines
42 KiB
Plaintext
1495 lines
42 KiB
Plaintext
/* YACC parser for Ada expressions, for GDB.
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Copyright (C) 1986-2017 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* Parse an Ada expression from text in a string,
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and return the result as a struct expression pointer.
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That structure contains arithmetic operations in reverse polish,
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with constants represented by operations that are followed by special data.
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See expression.h for the details of the format.
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What is important here is that it can be built up sequentially
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during the process of parsing; the lower levels of the tree always
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come first in the result.
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malloc's and realloc's in this file are transformed to
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xmalloc and xrealloc respectively by the same sed command in the
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makefile that remaps any other malloc/realloc inserted by the parser
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generator. Doing this with #defines and trying to control the interaction
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with include files (<malloc.h> and <stdlib.h> for example) just became
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too messy, particularly when such includes can be inserted at random
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times by the parser generator. */
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%{
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#include "defs.h"
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#include <ctype.h>
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#include "expression.h"
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#include "value.h"
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#include "parser-defs.h"
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#include "language.h"
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#include "ada-lang.h"
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#include "bfd.h" /* Required by objfiles.h. */
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#include "symfile.h" /* Required by objfiles.h. */
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#include "objfiles.h" /* For have_full_symbols and have_partial_symbols */
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#include "frame.h"
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#include "block.h"
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#define parse_type(ps) builtin_type (parse_gdbarch (ps))
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/* Remap normal yacc parser interface names (yyparse, yylex, yyerror,
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etc). */
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#define GDB_YY_REMAP_PREFIX ada_
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#include "yy-remap.h"
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struct name_info {
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struct symbol *sym;
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struct minimal_symbol *msym;
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const struct block *block;
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struct stoken stoken;
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};
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/* The state of the parser, used internally when we are parsing the
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expression. */
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static struct parser_state *pstate = NULL;
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static struct stoken empty_stoken = { "", 0 };
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/* If expression is in the context of TYPE'(...), then TYPE, else
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* NULL. */
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static struct type *type_qualifier;
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int yyparse (void);
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static int yylex (void);
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void yyerror (char *);
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static void write_int (struct parser_state *, LONGEST, struct type *);
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static void write_object_renaming (struct parser_state *,
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const struct block *, const char *, int,
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const char *, int);
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static struct type* write_var_or_type (struct parser_state *,
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const struct block *, struct stoken);
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static void write_name_assoc (struct parser_state *, struct stoken);
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static void write_exp_op_with_string (struct parser_state *, enum exp_opcode,
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struct stoken);
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static const struct block *block_lookup (const struct block *, const char *);
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static LONGEST convert_char_literal (struct type *, LONGEST);
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static void write_ambiguous_var (struct parser_state *,
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const struct block *, char *, int);
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static struct type *type_int (struct parser_state *);
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static struct type *type_long (struct parser_state *);
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static struct type *type_long_long (struct parser_state *);
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static struct type *type_float (struct parser_state *);
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static struct type *type_double (struct parser_state *);
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static struct type *type_long_double (struct parser_state *);
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static struct type *type_char (struct parser_state *);
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static struct type *type_boolean (struct parser_state *);
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static struct type *type_system_address (struct parser_state *);
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%}
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%union
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{
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LONGEST lval;
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struct {
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LONGEST val;
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struct type *type;
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} typed_val;
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struct {
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DOUBLEST dval;
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struct type *type;
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} typed_val_float;
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struct type *tval;
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struct stoken sval;
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const struct block *bval;
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struct internalvar *ivar;
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}
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%type <lval> positional_list component_groups component_associations
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%type <lval> aggregate_component_list
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%type <tval> var_or_type
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%token <typed_val> INT NULL_PTR CHARLIT
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%token <typed_val_float> FLOAT
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%token TRUEKEYWORD FALSEKEYWORD
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%token COLONCOLON
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%token <sval> STRING NAME DOT_ID
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%type <bval> block
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%type <lval> arglist tick_arglist
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%type <tval> save_qualifier
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%token DOT_ALL
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/* Special type cases, put in to allow the parser to distinguish different
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legal basetypes. */
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%token <sval> SPECIAL_VARIABLE
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%nonassoc ASSIGN
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%left _AND_ OR XOR THEN ELSE
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%left '=' NOTEQUAL '<' '>' LEQ GEQ IN DOTDOT
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%left '@'
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%left '+' '-' '&'
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%left UNARY
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%left '*' '/' MOD REM
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%right STARSTAR ABS NOT
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/* Artificial token to give NAME => ... and NAME | priority over reducing
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NAME to <primary> and to give <primary>' priority over reducing <primary>
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to <simple_exp>. */
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%nonassoc VAR
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%nonassoc ARROW '|'
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%right TICK_ACCESS TICK_ADDRESS TICK_FIRST TICK_LAST TICK_LENGTH
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%right TICK_MAX TICK_MIN TICK_MODULUS
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%right TICK_POS TICK_RANGE TICK_SIZE TICK_TAG TICK_VAL
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/* The following are right-associative only so that reductions at this
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precedence have lower precedence than '.' and '('. The syntax still
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forces a.b.c, e.g., to be LEFT-associated. */
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%right '.' '(' '[' DOT_ID DOT_ALL
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%token NEW OTHERS
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%%
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start : exp1
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;
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/* Expressions, including the sequencing operator. */
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exp1 : exp
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| exp1 ';' exp
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{ write_exp_elt_opcode (pstate, BINOP_COMMA); }
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| primary ASSIGN exp /* Extension for convenience */
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{ write_exp_elt_opcode (pstate, BINOP_ASSIGN); }
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;
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/* Expressions, not including the sequencing operator. */
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primary : primary DOT_ALL
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{ write_exp_elt_opcode (pstate, UNOP_IND); }
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;
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primary : primary DOT_ID
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{ write_exp_op_with_string (pstate, STRUCTOP_STRUCT,
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$2); }
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;
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primary : primary '(' arglist ')'
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{
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write_exp_elt_opcode (pstate, OP_FUNCALL);
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write_exp_elt_longcst (pstate, $3);
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write_exp_elt_opcode (pstate, OP_FUNCALL);
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}
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| var_or_type '(' arglist ')'
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{
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if ($1 != NULL)
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{
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if ($3 != 1)
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error (_("Invalid conversion"));
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write_exp_elt_opcode (pstate, UNOP_CAST);
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write_exp_elt_type (pstate, $1);
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write_exp_elt_opcode (pstate, UNOP_CAST);
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}
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else
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{
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write_exp_elt_opcode (pstate, OP_FUNCALL);
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write_exp_elt_longcst (pstate, $3);
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write_exp_elt_opcode (pstate, OP_FUNCALL);
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}
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}
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;
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primary : var_or_type '\'' save_qualifier { type_qualifier = $1; }
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'(' exp ')'
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{
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if ($1 == NULL)
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error (_("Type required for qualification"));
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write_exp_elt_opcode (pstate, UNOP_QUAL);
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write_exp_elt_type (pstate, $1);
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write_exp_elt_opcode (pstate, UNOP_QUAL);
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type_qualifier = $3;
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}
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;
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save_qualifier : { $$ = type_qualifier; }
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;
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primary :
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primary '(' simple_exp DOTDOT simple_exp ')'
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{ write_exp_elt_opcode (pstate, TERNOP_SLICE); }
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| var_or_type '(' simple_exp DOTDOT simple_exp ')'
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{ if ($1 == NULL)
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write_exp_elt_opcode (pstate, TERNOP_SLICE);
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else
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error (_("Cannot slice a type"));
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}
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;
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primary : '(' exp1 ')' { }
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;
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/* The following rule causes a conflict with the type conversion
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var_or_type (exp)
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To get around it, we give '(' higher priority and add bridge rules for
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var_or_type (exp, exp, ...)
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var_or_type (exp .. exp)
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We also have the action for var_or_type(exp) generate a function call
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when the first symbol does not denote a type. */
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primary : var_or_type %prec VAR
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{ if ($1 != NULL)
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{
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write_exp_elt_opcode (pstate, OP_TYPE);
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write_exp_elt_type (pstate, $1);
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write_exp_elt_opcode (pstate, OP_TYPE);
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}
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}
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;
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primary : SPECIAL_VARIABLE /* Various GDB extensions */
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{ write_dollar_variable (pstate, $1); }
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;
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primary : aggregate
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;
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simple_exp : primary
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;
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simple_exp : '-' simple_exp %prec UNARY
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{ write_exp_elt_opcode (pstate, UNOP_NEG); }
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;
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simple_exp : '+' simple_exp %prec UNARY
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{ write_exp_elt_opcode (pstate, UNOP_PLUS); }
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;
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simple_exp : NOT simple_exp %prec UNARY
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{ write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT); }
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;
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simple_exp : ABS simple_exp %prec UNARY
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{ write_exp_elt_opcode (pstate, UNOP_ABS); }
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;
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arglist : { $$ = 0; }
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;
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arglist : exp
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{ $$ = 1; }
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| NAME ARROW exp
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{ $$ = 1; }
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| arglist ',' exp
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{ $$ = $1 + 1; }
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| arglist ',' NAME ARROW exp
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{ $$ = $1 + 1; }
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;
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primary : '{' var_or_type '}' primary %prec '.'
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/* GDB extension */
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{
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if ($2 == NULL)
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error (_("Type required within braces in coercion"));
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write_exp_elt_opcode (pstate, UNOP_MEMVAL);
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write_exp_elt_type (pstate, $2);
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write_exp_elt_opcode (pstate, UNOP_MEMVAL);
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}
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;
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/* Binary operators in order of decreasing precedence. */
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simple_exp : simple_exp STARSTAR simple_exp
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{ write_exp_elt_opcode (pstate, BINOP_EXP); }
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;
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simple_exp : simple_exp '*' simple_exp
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{ write_exp_elt_opcode (pstate, BINOP_MUL); }
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;
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simple_exp : simple_exp '/' simple_exp
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{ write_exp_elt_opcode (pstate, BINOP_DIV); }
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;
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simple_exp : simple_exp REM simple_exp /* May need to be fixed to give correct Ada REM */
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{ write_exp_elt_opcode (pstate, BINOP_REM); }
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;
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simple_exp : simple_exp MOD simple_exp
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{ write_exp_elt_opcode (pstate, BINOP_MOD); }
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;
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simple_exp : simple_exp '@' simple_exp /* GDB extension */
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{ write_exp_elt_opcode (pstate, BINOP_REPEAT); }
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;
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simple_exp : simple_exp '+' simple_exp
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{ write_exp_elt_opcode (pstate, BINOP_ADD); }
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;
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simple_exp : simple_exp '&' simple_exp
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{ write_exp_elt_opcode (pstate, BINOP_CONCAT); }
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;
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simple_exp : simple_exp '-' simple_exp
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{ write_exp_elt_opcode (pstate, BINOP_SUB); }
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;
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relation : simple_exp
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;
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relation : simple_exp '=' simple_exp
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{ write_exp_elt_opcode (pstate, BINOP_EQUAL); }
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;
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relation : simple_exp NOTEQUAL simple_exp
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{ write_exp_elt_opcode (pstate, BINOP_NOTEQUAL); }
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;
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relation : simple_exp LEQ simple_exp
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{ write_exp_elt_opcode (pstate, BINOP_LEQ); }
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;
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relation : simple_exp IN simple_exp DOTDOT simple_exp
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{ write_exp_elt_opcode (pstate, TERNOP_IN_RANGE); }
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| simple_exp IN primary TICK_RANGE tick_arglist
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{ write_exp_elt_opcode (pstate, BINOP_IN_BOUNDS);
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write_exp_elt_longcst (pstate, (LONGEST) $5);
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write_exp_elt_opcode (pstate, BINOP_IN_BOUNDS);
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}
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| simple_exp IN var_or_type %prec TICK_ACCESS
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{
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if ($3 == NULL)
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error (_("Right operand of 'in' must be type"));
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write_exp_elt_opcode (pstate, UNOP_IN_RANGE);
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write_exp_elt_type (pstate, $3);
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write_exp_elt_opcode (pstate, UNOP_IN_RANGE);
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}
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| simple_exp NOT IN simple_exp DOTDOT simple_exp
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{ write_exp_elt_opcode (pstate, TERNOP_IN_RANGE);
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write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT);
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}
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| simple_exp NOT IN primary TICK_RANGE tick_arglist
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{ write_exp_elt_opcode (pstate, BINOP_IN_BOUNDS);
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write_exp_elt_longcst (pstate, (LONGEST) $6);
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write_exp_elt_opcode (pstate, BINOP_IN_BOUNDS);
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write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT);
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}
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| simple_exp NOT IN var_or_type %prec TICK_ACCESS
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{
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if ($4 == NULL)
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error (_("Right operand of 'in' must be type"));
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write_exp_elt_opcode (pstate, UNOP_IN_RANGE);
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write_exp_elt_type (pstate, $4);
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write_exp_elt_opcode (pstate, UNOP_IN_RANGE);
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write_exp_elt_opcode (pstate, UNOP_LOGICAL_NOT);
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}
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;
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relation : simple_exp GEQ simple_exp
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{ write_exp_elt_opcode (pstate, BINOP_GEQ); }
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;
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relation : simple_exp '<' simple_exp
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{ write_exp_elt_opcode (pstate, BINOP_LESS); }
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;
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relation : simple_exp '>' simple_exp
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{ write_exp_elt_opcode (pstate, BINOP_GTR); }
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;
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exp : relation
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| and_exp
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| and_then_exp
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| or_exp
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| or_else_exp
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| xor_exp
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||
;
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and_exp :
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relation _AND_ relation
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{ write_exp_elt_opcode (pstate, BINOP_BITWISE_AND); }
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| and_exp _AND_ relation
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{ write_exp_elt_opcode (pstate, BINOP_BITWISE_AND); }
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||
;
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||
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and_then_exp :
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relation _AND_ THEN relation
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{ write_exp_elt_opcode (pstate, BINOP_LOGICAL_AND); }
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||
| and_then_exp _AND_ THEN relation
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{ write_exp_elt_opcode (pstate, BINOP_LOGICAL_AND); }
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;
|
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or_exp :
|
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relation OR relation
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{ write_exp_elt_opcode (pstate, BINOP_BITWISE_IOR); }
|
||
| or_exp OR relation
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{ write_exp_elt_opcode (pstate, BINOP_BITWISE_IOR); }
|
||
;
|
||
|
||
or_else_exp :
|
||
relation OR ELSE relation
|
||
{ write_exp_elt_opcode (pstate, BINOP_LOGICAL_OR); }
|
||
| or_else_exp OR ELSE relation
|
||
{ write_exp_elt_opcode (pstate, BINOP_LOGICAL_OR); }
|
||
;
|
||
|
||
xor_exp : relation XOR relation
|
||
{ write_exp_elt_opcode (pstate, BINOP_BITWISE_XOR); }
|
||
| xor_exp XOR relation
|
||
{ write_exp_elt_opcode (pstate, BINOP_BITWISE_XOR); }
|
||
;
|
||
|
||
/* Primaries can denote types (OP_TYPE). In cases such as
|
||
primary TICK_ADDRESS, where a type would be invalid, it will be
|
||
caught when evaluate_subexp in ada-lang.c tries to evaluate the
|
||
primary, expecting a value. Precedence rules resolve the ambiguity
|
||
in NAME TICK_ACCESS in favor of shifting to form a var_or_type. A
|
||
construct such as aType'access'access will again cause an error when
|
||
aType'access evaluates to a type that evaluate_subexp attempts to
|
||
evaluate. */
|
||
primary : primary TICK_ACCESS
|
||
{ write_exp_elt_opcode (pstate, UNOP_ADDR); }
|
||
| primary TICK_ADDRESS
|
||
{ write_exp_elt_opcode (pstate, UNOP_ADDR);
|
||
write_exp_elt_opcode (pstate, UNOP_CAST);
|
||
write_exp_elt_type (pstate,
|
||
type_system_address (pstate));
|
||
write_exp_elt_opcode (pstate, UNOP_CAST);
|
||
}
|
||
| primary TICK_FIRST tick_arglist
|
||
{ write_int (pstate, $3, type_int (pstate));
|
||
write_exp_elt_opcode (pstate, OP_ATR_FIRST); }
|
||
| primary TICK_LAST tick_arglist
|
||
{ write_int (pstate, $3, type_int (pstate));
|
||
write_exp_elt_opcode (pstate, OP_ATR_LAST); }
|
||
| primary TICK_LENGTH tick_arglist
|
||
{ write_int (pstate, $3, type_int (pstate));
|
||
write_exp_elt_opcode (pstate, OP_ATR_LENGTH); }
|
||
| primary TICK_SIZE
|
||
{ write_exp_elt_opcode (pstate, OP_ATR_SIZE); }
|
||
| primary TICK_TAG
|
||
{ write_exp_elt_opcode (pstate, OP_ATR_TAG); }
|
||
| opt_type_prefix TICK_MIN '(' exp ',' exp ')'
|
||
{ write_exp_elt_opcode (pstate, OP_ATR_MIN); }
|
||
| opt_type_prefix TICK_MAX '(' exp ',' exp ')'
|
||
{ write_exp_elt_opcode (pstate, OP_ATR_MAX); }
|
||
| opt_type_prefix TICK_POS '(' exp ')'
|
||
{ write_exp_elt_opcode (pstate, OP_ATR_POS); }
|
||
| type_prefix TICK_VAL '(' exp ')'
|
||
{ write_exp_elt_opcode (pstate, OP_ATR_VAL); }
|
||
| type_prefix TICK_MODULUS
|
||
{ write_exp_elt_opcode (pstate, OP_ATR_MODULUS); }
|
||
;
|
||
|
||
tick_arglist : %prec '('
|
||
{ $$ = 1; }
|
||
| '(' INT ')'
|
||
{ $$ = $2.val; }
|
||
;
|
||
|
||
type_prefix :
|
||
var_or_type
|
||
{
|
||
if ($1 == NULL)
|
||
error (_("Prefix must be type"));
|
||
write_exp_elt_opcode (pstate, OP_TYPE);
|
||
write_exp_elt_type (pstate, $1);
|
||
write_exp_elt_opcode (pstate, OP_TYPE); }
|
||
;
|
||
|
||
opt_type_prefix :
|
||
type_prefix
|
||
| /* EMPTY */
|
||
{ write_exp_elt_opcode (pstate, OP_TYPE);
|
||
write_exp_elt_type (pstate,
|
||
parse_type (pstate)->builtin_void);
|
||
write_exp_elt_opcode (pstate, OP_TYPE); }
|
||
;
|
||
|
||
|
||
primary : INT
|
||
{ write_int (pstate, (LONGEST) $1.val, $1.type); }
|
||
;
|
||
|
||
primary : CHARLIT
|
||
{ write_int (pstate,
|
||
convert_char_literal (type_qualifier, $1.val),
|
||
(type_qualifier == NULL)
|
||
? $1.type : type_qualifier);
|
||
}
|
||
;
|
||
|
||
primary : FLOAT
|
||
{ write_exp_elt_opcode (pstate, OP_DOUBLE);
|
||
write_exp_elt_type (pstate, $1.type);
|
||
write_exp_elt_dblcst (pstate, $1.dval);
|
||
write_exp_elt_opcode (pstate, OP_DOUBLE);
|
||
}
|
||
;
|
||
|
||
primary : NULL_PTR
|
||
{ write_int (pstate, 0, type_int (pstate)); }
|
||
;
|
||
|
||
primary : STRING
|
||
{
|
||
write_exp_op_with_string (pstate, OP_STRING, $1);
|
||
}
|
||
;
|
||
|
||
primary : TRUEKEYWORD
|
||
{ write_int (pstate, 1, type_boolean (pstate)); }
|
||
| FALSEKEYWORD
|
||
{ write_int (pstate, 0, type_boolean (pstate)); }
|
||
;
|
||
|
||
primary : NEW NAME
|
||
{ error (_("NEW not implemented.")); }
|
||
;
|
||
|
||
var_or_type: NAME %prec VAR
|
||
{ $$ = write_var_or_type (pstate, NULL, $1); }
|
||
| block NAME %prec VAR
|
||
{ $$ = write_var_or_type (pstate, $1, $2); }
|
||
| NAME TICK_ACCESS
|
||
{
|
||
$$ = write_var_or_type (pstate, NULL, $1);
|
||
if ($$ == NULL)
|
||
write_exp_elt_opcode (pstate, UNOP_ADDR);
|
||
else
|
||
$$ = lookup_pointer_type ($$);
|
||
}
|
||
| block NAME TICK_ACCESS
|
||
{
|
||
$$ = write_var_or_type (pstate, $1, $2);
|
||
if ($$ == NULL)
|
||
write_exp_elt_opcode (pstate, UNOP_ADDR);
|
||
else
|
||
$$ = lookup_pointer_type ($$);
|
||
}
|
||
;
|
||
|
||
/* GDB extension */
|
||
block : NAME COLONCOLON
|
||
{ $$ = block_lookup (NULL, $1.ptr); }
|
||
| block NAME COLONCOLON
|
||
{ $$ = block_lookup ($1, $2.ptr); }
|
||
;
|
||
|
||
aggregate :
|
||
'(' aggregate_component_list ')'
|
||
{
|
||
write_exp_elt_opcode (pstate, OP_AGGREGATE);
|
||
write_exp_elt_longcst (pstate, $2);
|
||
write_exp_elt_opcode (pstate, OP_AGGREGATE);
|
||
}
|
||
;
|
||
|
||
aggregate_component_list :
|
||
component_groups { $$ = $1; }
|
||
| positional_list exp
|
||
{ write_exp_elt_opcode (pstate, OP_POSITIONAL);
|
||
write_exp_elt_longcst (pstate, $1);
|
||
write_exp_elt_opcode (pstate, OP_POSITIONAL);
|
||
$$ = $1 + 1;
|
||
}
|
||
| positional_list component_groups
|
||
{ $$ = $1 + $2; }
|
||
;
|
||
|
||
positional_list :
|
||
exp ','
|
||
{ write_exp_elt_opcode (pstate, OP_POSITIONAL);
|
||
write_exp_elt_longcst (pstate, 0);
|
||
write_exp_elt_opcode (pstate, OP_POSITIONAL);
|
||
$$ = 1;
|
||
}
|
||
| positional_list exp ','
|
||
{ write_exp_elt_opcode (pstate, OP_POSITIONAL);
|
||
write_exp_elt_longcst (pstate, $1);
|
||
write_exp_elt_opcode (pstate, OP_POSITIONAL);
|
||
$$ = $1 + 1;
|
||
}
|
||
;
|
||
|
||
component_groups:
|
||
others { $$ = 1; }
|
||
| component_group { $$ = 1; }
|
||
| component_group ',' component_groups
|
||
{ $$ = $3 + 1; }
|
||
;
|
||
|
||
others : OTHERS ARROW exp
|
||
{ write_exp_elt_opcode (pstate, OP_OTHERS); }
|
||
;
|
||
|
||
component_group :
|
||
component_associations
|
||
{
|
||
write_exp_elt_opcode (pstate, OP_CHOICES);
|
||
write_exp_elt_longcst (pstate, $1);
|
||
write_exp_elt_opcode (pstate, OP_CHOICES);
|
||
}
|
||
;
|
||
|
||
/* We use this somewhat obscure definition in order to handle NAME => and
|
||
NAME | differently from exp => and exp |. ARROW and '|' have a precedence
|
||
above that of the reduction of NAME to var_or_type. By delaying
|
||
decisions until after the => or '|', we convert the ambiguity to a
|
||
resolved shift/reduce conflict. */
|
||
component_associations :
|
||
NAME ARROW
|
||
{ write_name_assoc (pstate, $1); }
|
||
exp { $$ = 1; }
|
||
| simple_exp ARROW exp
|
||
{ $$ = 1; }
|
||
| simple_exp DOTDOT simple_exp ARROW
|
||
{ write_exp_elt_opcode (pstate, OP_DISCRETE_RANGE);
|
||
write_exp_op_with_string (pstate, OP_NAME,
|
||
empty_stoken);
|
||
}
|
||
exp { $$ = 1; }
|
||
| NAME '|'
|
||
{ write_name_assoc (pstate, $1); }
|
||
component_associations { $$ = $4 + 1; }
|
||
| simple_exp '|'
|
||
component_associations { $$ = $3 + 1; }
|
||
| simple_exp DOTDOT simple_exp '|'
|
||
{ write_exp_elt_opcode (pstate, OP_DISCRETE_RANGE); }
|
||
component_associations { $$ = $6 + 1; }
|
||
;
|
||
|
||
/* Some extensions borrowed from C, for the benefit of those who find they
|
||
can't get used to Ada notation in GDB. */
|
||
|
||
primary : '*' primary %prec '.'
|
||
{ write_exp_elt_opcode (pstate, UNOP_IND); }
|
||
| '&' primary %prec '.'
|
||
{ write_exp_elt_opcode (pstate, UNOP_ADDR); }
|
||
| primary '[' exp ']'
|
||
{ write_exp_elt_opcode (pstate, BINOP_SUBSCRIPT); }
|
||
;
|
||
|
||
%%
|
||
|
||
/* yylex defined in ada-lex.c: Reads one token, getting characters */
|
||
/* through lexptr. */
|
||
|
||
/* Remap normal flex interface names (yylex) as well as gratuitiously */
|
||
/* global symbol names, so we can have multiple flex-generated parsers */
|
||
/* in gdb. */
|
||
|
||
/* (See note above on previous definitions for YACC.) */
|
||
|
||
#define yy_create_buffer ada_yy_create_buffer
|
||
#define yy_delete_buffer ada_yy_delete_buffer
|
||
#define yy_init_buffer ada_yy_init_buffer
|
||
#define yy_load_buffer_state ada_yy_load_buffer_state
|
||
#define yy_switch_to_buffer ada_yy_switch_to_buffer
|
||
#define yyrestart ada_yyrestart
|
||
#define yytext ada_yytext
|
||
#define yywrap ada_yywrap
|
||
|
||
static struct obstack temp_parse_space;
|
||
|
||
/* The following kludge was found necessary to prevent conflicts between */
|
||
/* defs.h and non-standard stdlib.h files. */
|
||
#define qsort __qsort__dummy
|
||
#include "ada-lex.c"
|
||
|
||
int
|
||
ada_parse (struct parser_state *par_state)
|
||
{
|
||
int result;
|
||
struct cleanup *c = make_cleanup_clear_parser_state (&pstate);
|
||
|
||
/* Setting up the parser state. */
|
||
gdb_assert (par_state != NULL);
|
||
pstate = par_state;
|
||
|
||
lexer_init (yyin); /* (Re-)initialize lexer. */
|
||
type_qualifier = NULL;
|
||
obstack_free (&temp_parse_space, NULL);
|
||
obstack_init (&temp_parse_space);
|
||
|
||
result = yyparse ();
|
||
do_cleanups (c);
|
||
return result;
|
||
}
|
||
|
||
void
|
||
yyerror (char *msg)
|
||
{
|
||
error (_("Error in expression, near `%s'."), lexptr);
|
||
}
|
||
|
||
/* Emit expression to access an instance of SYM, in block BLOCK (if
|
||
* non-NULL), and with :: qualification ORIG_LEFT_CONTEXT. */
|
||
static void
|
||
write_var_from_sym (struct parser_state *par_state,
|
||
const struct block *orig_left_context,
|
||
const struct block *block,
|
||
struct symbol *sym)
|
||
{
|
||
if (orig_left_context == NULL && symbol_read_needs_frame (sym))
|
||
{
|
||
if (innermost_block == 0
|
||
|| contained_in (block, innermost_block))
|
||
innermost_block = block;
|
||
}
|
||
|
||
write_exp_elt_opcode (par_state, OP_VAR_VALUE);
|
||
write_exp_elt_block (par_state, block);
|
||
write_exp_elt_sym (par_state, sym);
|
||
write_exp_elt_opcode (par_state, OP_VAR_VALUE);
|
||
}
|
||
|
||
/* Write integer or boolean constant ARG of type TYPE. */
|
||
|
||
static void
|
||
write_int (struct parser_state *par_state, LONGEST arg, struct type *type)
|
||
{
|
||
write_exp_elt_opcode (par_state, OP_LONG);
|
||
write_exp_elt_type (par_state, type);
|
||
write_exp_elt_longcst (par_state, arg);
|
||
write_exp_elt_opcode (par_state, OP_LONG);
|
||
}
|
||
|
||
/* Write an OPCODE, string, OPCODE sequence to the current expression. */
|
||
static void
|
||
write_exp_op_with_string (struct parser_state *par_state,
|
||
enum exp_opcode opcode, struct stoken token)
|
||
{
|
||
write_exp_elt_opcode (par_state, opcode);
|
||
write_exp_string (par_state, token);
|
||
write_exp_elt_opcode (par_state, opcode);
|
||
}
|
||
|
||
/* Emit expression corresponding to the renamed object named
|
||
* designated by RENAMED_ENTITY[0 .. RENAMED_ENTITY_LEN-1] in the
|
||
* context of ORIG_LEFT_CONTEXT, to which is applied the operations
|
||
* encoded by RENAMING_EXPR. MAX_DEPTH is the maximum number of
|
||
* cascaded renamings to allow. If ORIG_LEFT_CONTEXT is null, it
|
||
* defaults to the currently selected block. ORIG_SYMBOL is the
|
||
* symbol that originally encoded the renaming. It is needed only
|
||
* because its prefix also qualifies any index variables used to index
|
||
* or slice an array. It should not be necessary once we go to the
|
||
* new encoding entirely (FIXME pnh 7/20/2007). */
|
||
|
||
static void
|
||
write_object_renaming (struct parser_state *par_state,
|
||
const struct block *orig_left_context,
|
||
const char *renamed_entity, int renamed_entity_len,
|
||
const char *renaming_expr, int max_depth)
|
||
{
|
||
char *name;
|
||
enum { SIMPLE_INDEX, LOWER_BOUND, UPPER_BOUND } slice_state;
|
||
struct block_symbol sym_info;
|
||
|
||
if (max_depth <= 0)
|
||
error (_("Could not find renamed symbol"));
|
||
|
||
if (orig_left_context == NULL)
|
||
orig_left_context = get_selected_block (NULL);
|
||
|
||
name = (char *) obstack_copy0 (&temp_parse_space, renamed_entity,
|
||
renamed_entity_len);
|
||
ada_lookup_encoded_symbol (name, orig_left_context, VAR_DOMAIN, &sym_info);
|
||
if (sym_info.symbol == NULL)
|
||
error (_("Could not find renamed variable: %s"), ada_decode (name));
|
||
else if (SYMBOL_CLASS (sym_info.symbol) == LOC_TYPEDEF)
|
||
/* We have a renaming of an old-style renaming symbol. Don't
|
||
trust the block information. */
|
||
sym_info.block = orig_left_context;
|
||
|
||
{
|
||
const char *inner_renamed_entity;
|
||
int inner_renamed_entity_len;
|
||
const char *inner_renaming_expr;
|
||
|
||
switch (ada_parse_renaming (sym_info.symbol, &inner_renamed_entity,
|
||
&inner_renamed_entity_len,
|
||
&inner_renaming_expr))
|
||
{
|
||
case ADA_NOT_RENAMING:
|
||
write_var_from_sym (par_state, orig_left_context, sym_info.block,
|
||
sym_info.symbol);
|
||
break;
|
||
case ADA_OBJECT_RENAMING:
|
||
write_object_renaming (par_state, sym_info.block,
|
||
inner_renamed_entity, inner_renamed_entity_len,
|
||
inner_renaming_expr, max_depth - 1);
|
||
break;
|
||
default:
|
||
goto BadEncoding;
|
||
}
|
||
}
|
||
|
||
slice_state = SIMPLE_INDEX;
|
||
while (*renaming_expr == 'X')
|
||
{
|
||
renaming_expr += 1;
|
||
|
||
switch (*renaming_expr) {
|
||
case 'A':
|
||
renaming_expr += 1;
|
||
write_exp_elt_opcode (par_state, UNOP_IND);
|
||
break;
|
||
case 'L':
|
||
slice_state = LOWER_BOUND;
|
||
/* FALLTHROUGH */
|
||
case 'S':
|
||
renaming_expr += 1;
|
||
if (isdigit (*renaming_expr))
|
||
{
|
||
char *next;
|
||
long val = strtol (renaming_expr, &next, 10);
|
||
if (next == renaming_expr)
|
||
goto BadEncoding;
|
||
renaming_expr = next;
|
||
write_exp_elt_opcode (par_state, OP_LONG);
|
||
write_exp_elt_type (par_state, type_int (par_state));
|
||
write_exp_elt_longcst (par_state, (LONGEST) val);
|
||
write_exp_elt_opcode (par_state, OP_LONG);
|
||
}
|
||
else
|
||
{
|
||
const char *end;
|
||
char *index_name;
|
||
struct block_symbol index_sym_info;
|
||
|
||
end = strchr (renaming_expr, 'X');
|
||
if (end == NULL)
|
||
end = renaming_expr + strlen (renaming_expr);
|
||
|
||
index_name
|
||
= (char *) obstack_copy0 (&temp_parse_space, renaming_expr,
|
||
end - renaming_expr);
|
||
renaming_expr = end;
|
||
|
||
ada_lookup_encoded_symbol (index_name, NULL, VAR_DOMAIN,
|
||
&index_sym_info);
|
||
if (index_sym_info.symbol == NULL)
|
||
error (_("Could not find %s"), index_name);
|
||
else if (SYMBOL_CLASS (index_sym_info.symbol) == LOC_TYPEDEF)
|
||
/* Index is an old-style renaming symbol. */
|
||
index_sym_info.block = orig_left_context;
|
||
write_var_from_sym (par_state, NULL, index_sym_info.block,
|
||
index_sym_info.symbol);
|
||
}
|
||
if (slice_state == SIMPLE_INDEX)
|
||
{
|
||
write_exp_elt_opcode (par_state, OP_FUNCALL);
|
||
write_exp_elt_longcst (par_state, (LONGEST) 1);
|
||
write_exp_elt_opcode (par_state, OP_FUNCALL);
|
||
}
|
||
else if (slice_state == LOWER_BOUND)
|
||
slice_state = UPPER_BOUND;
|
||
else if (slice_state == UPPER_BOUND)
|
||
{
|
||
write_exp_elt_opcode (par_state, TERNOP_SLICE);
|
||
slice_state = SIMPLE_INDEX;
|
||
}
|
||
break;
|
||
|
||
case 'R':
|
||
{
|
||
struct stoken field_name;
|
||
const char *end;
|
||
char *buf;
|
||
|
||
renaming_expr += 1;
|
||
|
||
if (slice_state != SIMPLE_INDEX)
|
||
goto BadEncoding;
|
||
end = strchr (renaming_expr, 'X');
|
||
if (end == NULL)
|
||
end = renaming_expr + strlen (renaming_expr);
|
||
field_name.length = end - renaming_expr;
|
||
buf = (char *) malloc (end - renaming_expr + 1);
|
||
field_name.ptr = buf;
|
||
strncpy (buf, renaming_expr, end - renaming_expr);
|
||
buf[end - renaming_expr] = '\000';
|
||
renaming_expr = end;
|
||
write_exp_op_with_string (par_state, STRUCTOP_STRUCT, field_name);
|
||
break;
|
||
}
|
||
|
||
default:
|
||
goto BadEncoding;
|
||
}
|
||
}
|
||
if (slice_state == SIMPLE_INDEX)
|
||
return;
|
||
|
||
BadEncoding:
|
||
error (_("Internal error in encoding of renaming declaration"));
|
||
}
|
||
|
||
static const struct block*
|
||
block_lookup (const struct block *context, const char *raw_name)
|
||
{
|
||
const char *name;
|
||
struct block_symbol *syms;
|
||
int nsyms;
|
||
struct symtab *symtab;
|
||
|
||
if (raw_name[0] == '\'')
|
||
{
|
||
raw_name += 1;
|
||
name = raw_name;
|
||
}
|
||
else
|
||
name = ada_encode (raw_name);
|
||
|
||
nsyms = ada_lookup_symbol_list (name, context, VAR_DOMAIN, &syms);
|
||
if (context == NULL
|
||
&& (nsyms == 0 || SYMBOL_CLASS (syms[0].symbol) != LOC_BLOCK))
|
||
symtab = lookup_symtab (name);
|
||
else
|
||
symtab = NULL;
|
||
|
||
if (symtab != NULL)
|
||
return BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (symtab), STATIC_BLOCK);
|
||
else if (nsyms == 0 || SYMBOL_CLASS (syms[0].symbol) != LOC_BLOCK)
|
||
{
|
||
if (context == NULL)
|
||
error (_("No file or function \"%s\"."), raw_name);
|
||
else
|
||
error (_("No function \"%s\" in specified context."), raw_name);
|
||
}
|
||
else
|
||
{
|
||
if (nsyms > 1)
|
||
warning (_("Function name \"%s\" ambiguous here"), raw_name);
|
||
return SYMBOL_BLOCK_VALUE (syms[0].symbol);
|
||
}
|
||
}
|
||
|
||
static struct symbol*
|
||
select_possible_type_sym (struct block_symbol *syms, int nsyms)
|
||
{
|
||
int i;
|
||
int preferred_index;
|
||
struct type *preferred_type;
|
||
|
||
preferred_index = -1; preferred_type = NULL;
|
||
for (i = 0; i < nsyms; i += 1)
|
||
switch (SYMBOL_CLASS (syms[i].symbol))
|
||
{
|
||
case LOC_TYPEDEF:
|
||
if (ada_prefer_type (SYMBOL_TYPE (syms[i].symbol), preferred_type))
|
||
{
|
||
preferred_index = i;
|
||
preferred_type = SYMBOL_TYPE (syms[i].symbol);
|
||
}
|
||
break;
|
||
case LOC_REGISTER:
|
||
case LOC_ARG:
|
||
case LOC_REF_ARG:
|
||
case LOC_REGPARM_ADDR:
|
||
case LOC_LOCAL:
|
||
case LOC_COMPUTED:
|
||
return NULL;
|
||
default:
|
||
break;
|
||
}
|
||
if (preferred_type == NULL)
|
||
return NULL;
|
||
return syms[preferred_index].symbol;
|
||
}
|
||
|
||
static struct type*
|
||
find_primitive_type (struct parser_state *par_state, char *name)
|
||
{
|
||
struct type *type;
|
||
type = language_lookup_primitive_type (parse_language (par_state),
|
||
parse_gdbarch (par_state),
|
||
name);
|
||
if (type == NULL && strcmp ("system__address", name) == 0)
|
||
type = type_system_address (par_state);
|
||
|
||
if (type != NULL)
|
||
{
|
||
/* Check to see if we have a regular definition of this
|
||
type that just didn't happen to have been read yet. */
|
||
struct symbol *sym;
|
||
char *expanded_name =
|
||
(char *) alloca (strlen (name) + sizeof ("standard__"));
|
||
strcpy (expanded_name, "standard__");
|
||
strcat (expanded_name, name);
|
||
sym = ada_lookup_symbol (expanded_name, NULL, VAR_DOMAIN, NULL).symbol;
|
||
if (sym != NULL && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
|
||
type = SYMBOL_TYPE (sym);
|
||
}
|
||
|
||
return type;
|
||
}
|
||
|
||
static int
|
||
chop_selector (char *name, int end)
|
||
{
|
||
int i;
|
||
for (i = end - 1; i > 0; i -= 1)
|
||
if (name[i] == '.' || (name[i] == '_' && name[i+1] == '_'))
|
||
return i;
|
||
return -1;
|
||
}
|
||
|
||
/* If NAME is a string beginning with a separator (either '__', or
|
||
'.'), chop this separator and return the result; else, return
|
||
NAME. */
|
||
|
||
static char *
|
||
chop_separator (char *name)
|
||
{
|
||
if (*name == '.')
|
||
return name + 1;
|
||
|
||
if (name[0] == '_' && name[1] == '_')
|
||
return name + 2;
|
||
|
||
return name;
|
||
}
|
||
|
||
/* Given that SELS is a string of the form (<sep><identifier>)*, where
|
||
<sep> is '__' or '.', write the indicated sequence of
|
||
STRUCTOP_STRUCT expression operators. */
|
||
static void
|
||
write_selectors (struct parser_state *par_state, char *sels)
|
||
{
|
||
while (*sels != '\0')
|
||
{
|
||
struct stoken field_name;
|
||
char *p = chop_separator (sels);
|
||
sels = p;
|
||
while (*sels != '\0' && *sels != '.'
|
||
&& (sels[0] != '_' || sels[1] != '_'))
|
||
sels += 1;
|
||
field_name.length = sels - p;
|
||
field_name.ptr = p;
|
||
write_exp_op_with_string (par_state, STRUCTOP_STRUCT, field_name);
|
||
}
|
||
}
|
||
|
||
/* Write a variable access (OP_VAR_VALUE) to ambiguous encoded name
|
||
NAME[0..LEN-1], in block context BLOCK, to be resolved later. Writes
|
||
a temporary symbol that is valid until the next call to ada_parse.
|
||
*/
|
||
static void
|
||
write_ambiguous_var (struct parser_state *par_state,
|
||
const struct block *block, char *name, int len)
|
||
{
|
||
struct symbol *sym = XOBNEW (&temp_parse_space, struct symbol);
|
||
|
||
memset (sym, 0, sizeof (struct symbol));
|
||
SYMBOL_DOMAIN (sym) = UNDEF_DOMAIN;
|
||
SYMBOL_LINKAGE_NAME (sym)
|
||
= (const char *) obstack_copy0 (&temp_parse_space, name, len);
|
||
SYMBOL_LANGUAGE (sym) = language_ada;
|
||
|
||
write_exp_elt_opcode (par_state, OP_VAR_VALUE);
|
||
write_exp_elt_block (par_state, block);
|
||
write_exp_elt_sym (par_state, sym);
|
||
write_exp_elt_opcode (par_state, OP_VAR_VALUE);
|
||
}
|
||
|
||
/* A convenient wrapper around ada_get_field_index that takes
|
||
a non NUL-terminated FIELD_NAME0 and a FIELD_NAME_LEN instead
|
||
of a NUL-terminated field name. */
|
||
|
||
static int
|
||
ada_nget_field_index (const struct type *type, const char *field_name0,
|
||
int field_name_len, int maybe_missing)
|
||
{
|
||
char *field_name = (char *) alloca ((field_name_len + 1) * sizeof (char));
|
||
|
||
strncpy (field_name, field_name0, field_name_len);
|
||
field_name[field_name_len] = '\0';
|
||
return ada_get_field_index (type, field_name, maybe_missing);
|
||
}
|
||
|
||
/* If encoded_field_name is the name of a field inside symbol SYM,
|
||
then return the type of that field. Otherwise, return NULL.
|
||
|
||
This function is actually recursive, so if ENCODED_FIELD_NAME
|
||
doesn't match one of the fields of our symbol, then try to see
|
||
if ENCODED_FIELD_NAME could not be a succession of field names
|
||
(in other words, the user entered an expression of the form
|
||
TYPE_NAME.FIELD1.FIELD2.FIELD3), in which case we evaluate
|
||
each field name sequentially to obtain the desired field type.
|
||
In case of failure, we return NULL. */
|
||
|
||
static struct type *
|
||
get_symbol_field_type (struct symbol *sym, char *encoded_field_name)
|
||
{
|
||
char *field_name = encoded_field_name;
|
||
char *subfield_name;
|
||
struct type *type = SYMBOL_TYPE (sym);
|
||
int fieldno;
|
||
|
||
if (type == NULL || field_name == NULL)
|
||
return NULL;
|
||
type = check_typedef (type);
|
||
|
||
while (field_name[0] != '\0')
|
||
{
|
||
field_name = chop_separator (field_name);
|
||
|
||
fieldno = ada_get_field_index (type, field_name, 1);
|
||
if (fieldno >= 0)
|
||
return TYPE_FIELD_TYPE (type, fieldno);
|
||
|
||
subfield_name = field_name;
|
||
while (*subfield_name != '\0' && *subfield_name != '.'
|
||
&& (subfield_name[0] != '_' || subfield_name[1] != '_'))
|
||
subfield_name += 1;
|
||
|
||
if (subfield_name[0] == '\0')
|
||
return NULL;
|
||
|
||
fieldno = ada_nget_field_index (type, field_name,
|
||
subfield_name - field_name, 1);
|
||
if (fieldno < 0)
|
||
return NULL;
|
||
|
||
type = TYPE_FIELD_TYPE (type, fieldno);
|
||
field_name = subfield_name;
|
||
}
|
||
|
||
return NULL;
|
||
}
|
||
|
||
/* Look up NAME0 (an unencoded identifier or dotted name) in BLOCK (or
|
||
expression_block_context if NULL). If it denotes a type, return
|
||
that type. Otherwise, write expression code to evaluate it as an
|
||
object and return NULL. In this second case, NAME0 will, in general,
|
||
have the form <name>(.<selector_name>)*, where <name> is an object
|
||
or renaming encoded in the debugging data. Calls error if no
|
||
prefix <name> matches a name in the debugging data (i.e., matches
|
||
either a complete name or, as a wild-card match, the final
|
||
identifier). */
|
||
|
||
static struct type*
|
||
write_var_or_type (struct parser_state *par_state,
|
||
const struct block *block, struct stoken name0)
|
||
{
|
||
int depth;
|
||
char *encoded_name;
|
||
int name_len;
|
||
|
||
if (block == NULL)
|
||
block = expression_context_block;
|
||
|
||
encoded_name = ada_encode (name0.ptr);
|
||
name_len = strlen (encoded_name);
|
||
encoded_name
|
||
= (char *) obstack_copy0 (&temp_parse_space, encoded_name, name_len);
|
||
for (depth = 0; depth < MAX_RENAMING_CHAIN_LENGTH; depth += 1)
|
||
{
|
||
int tail_index;
|
||
|
||
tail_index = name_len;
|
||
while (tail_index > 0)
|
||
{
|
||
int nsyms;
|
||
struct block_symbol *syms;
|
||
struct symbol *type_sym;
|
||
struct symbol *renaming_sym;
|
||
const char* renaming;
|
||
int renaming_len;
|
||
const char* renaming_expr;
|
||
int terminator = encoded_name[tail_index];
|
||
|
||
encoded_name[tail_index] = '\0';
|
||
nsyms = ada_lookup_symbol_list (encoded_name, block,
|
||
VAR_DOMAIN, &syms);
|
||
encoded_name[tail_index] = terminator;
|
||
|
||
/* A single symbol may rename a package or object. */
|
||
|
||
/* This should go away when we move entirely to new version.
|
||
FIXME pnh 7/20/2007. */
|
||
if (nsyms == 1)
|
||
{
|
||
struct symbol *ren_sym =
|
||
ada_find_renaming_symbol (syms[0].symbol, syms[0].block);
|
||
|
||
if (ren_sym != NULL)
|
||
syms[0].symbol = ren_sym;
|
||
}
|
||
|
||
type_sym = select_possible_type_sym (syms, nsyms);
|
||
|
||
if (type_sym != NULL)
|
||
renaming_sym = type_sym;
|
||
else if (nsyms == 1)
|
||
renaming_sym = syms[0].symbol;
|
||
else
|
||
renaming_sym = NULL;
|
||
|
||
switch (ada_parse_renaming (renaming_sym, &renaming,
|
||
&renaming_len, &renaming_expr))
|
||
{
|
||
case ADA_NOT_RENAMING:
|
||
break;
|
||
case ADA_PACKAGE_RENAMING:
|
||
case ADA_EXCEPTION_RENAMING:
|
||
case ADA_SUBPROGRAM_RENAMING:
|
||
{
|
||
int alloc_len = renaming_len + name_len - tail_index + 1;
|
||
char *new_name
|
||
= (char *) obstack_alloc (&temp_parse_space, alloc_len);
|
||
strncpy (new_name, renaming, renaming_len);
|
||
strcpy (new_name + renaming_len, encoded_name + tail_index);
|
||
encoded_name = new_name;
|
||
name_len = renaming_len + name_len - tail_index;
|
||
goto TryAfterRenaming;
|
||
}
|
||
case ADA_OBJECT_RENAMING:
|
||
write_object_renaming (par_state, block, renaming, renaming_len,
|
||
renaming_expr, MAX_RENAMING_CHAIN_LENGTH);
|
||
write_selectors (par_state, encoded_name + tail_index);
|
||
return NULL;
|
||
default:
|
||
internal_error (__FILE__, __LINE__,
|
||
_("impossible value from ada_parse_renaming"));
|
||
}
|
||
|
||
if (type_sym != NULL)
|
||
{
|
||
struct type *field_type;
|
||
|
||
if (tail_index == name_len)
|
||
return SYMBOL_TYPE (type_sym);
|
||
|
||
/* We have some extraneous characters after the type name.
|
||
If this is an expression "TYPE_NAME.FIELD0.[...].FIELDN",
|
||
then try to get the type of FIELDN. */
|
||
field_type
|
||
= get_symbol_field_type (type_sym, encoded_name + tail_index);
|
||
if (field_type != NULL)
|
||
return field_type;
|
||
else
|
||
error (_("Invalid attempt to select from type: \"%s\"."),
|
||
name0.ptr);
|
||
}
|
||
else if (tail_index == name_len && nsyms == 0)
|
||
{
|
||
struct type *type = find_primitive_type (par_state,
|
||
encoded_name);
|
||
|
||
if (type != NULL)
|
||
return type;
|
||
}
|
||
|
||
if (nsyms == 1)
|
||
{
|
||
write_var_from_sym (par_state, block, syms[0].block,
|
||
syms[0].symbol);
|
||
write_selectors (par_state, encoded_name + tail_index);
|
||
return NULL;
|
||
}
|
||
else if (nsyms == 0)
|
||
{
|
||
struct bound_minimal_symbol msym
|
||
= ada_lookup_simple_minsym (encoded_name);
|
||
if (msym.minsym != NULL)
|
||
{
|
||
write_exp_msymbol (par_state, msym);
|
||
/* Maybe cause error here rather than later? FIXME? */
|
||
write_selectors (par_state, encoded_name + tail_index);
|
||
return NULL;
|
||
}
|
||
|
||
if (tail_index == name_len
|
||
&& strncmp (encoded_name, "standard__",
|
||
sizeof ("standard__") - 1) == 0)
|
||
error (_("No definition of \"%s\" found."), name0.ptr);
|
||
|
||
tail_index = chop_selector (encoded_name, tail_index);
|
||
}
|
||
else
|
||
{
|
||
write_ambiguous_var (par_state, block, encoded_name,
|
||
tail_index);
|
||
write_selectors (par_state, encoded_name + tail_index);
|
||
return NULL;
|
||
}
|
||
}
|
||
|
||
if (!have_full_symbols () && !have_partial_symbols () && block == NULL)
|
||
error (_("No symbol table is loaded. Use the \"file\" command."));
|
||
if (block == expression_context_block)
|
||
error (_("No definition of \"%s\" in current context."), name0.ptr);
|
||
else
|
||
error (_("No definition of \"%s\" in specified context."), name0.ptr);
|
||
|
||
TryAfterRenaming: ;
|
||
}
|
||
|
||
error (_("Could not find renamed symbol \"%s\""), name0.ptr);
|
||
|
||
}
|
||
|
||
/* Write a left side of a component association (e.g., NAME in NAME =>
|
||
exp). If NAME has the form of a selected component, write it as an
|
||
ordinary expression. If it is a simple variable that unambiguously
|
||
corresponds to exactly one symbol that does not denote a type or an
|
||
object renaming, also write it normally as an OP_VAR_VALUE.
|
||
Otherwise, write it as an OP_NAME.
|
||
|
||
Unfortunately, we don't know at this point whether NAME is supposed
|
||
to denote a record component name or the value of an array index.
|
||
Therefore, it is not appropriate to disambiguate an ambiguous name
|
||
as we normally would, nor to replace a renaming with its referent.
|
||
As a result, in the (one hopes) rare case that one writes an
|
||
aggregate such as (R => 42) where R renames an object or is an
|
||
ambiguous name, one must write instead ((R) => 42). */
|
||
|
||
static void
|
||
write_name_assoc (struct parser_state *par_state, struct stoken name)
|
||
{
|
||
if (strchr (name.ptr, '.') == NULL)
|
||
{
|
||
struct block_symbol *syms;
|
||
int nsyms = ada_lookup_symbol_list (name.ptr, expression_context_block,
|
||
VAR_DOMAIN, &syms);
|
||
|
||
if (nsyms != 1 || SYMBOL_CLASS (syms[0].symbol) == LOC_TYPEDEF)
|
||
write_exp_op_with_string (par_state, OP_NAME, name);
|
||
else
|
||
write_var_from_sym (par_state, NULL, syms[0].block, syms[0].symbol);
|
||
}
|
||
else
|
||
if (write_var_or_type (par_state, NULL, name) != NULL)
|
||
error (_("Invalid use of type."));
|
||
}
|
||
|
||
/* Convert the character literal whose ASCII value would be VAL to the
|
||
appropriate value of type TYPE, if there is a translation.
|
||
Otherwise return VAL. Hence, in an enumeration type ('A', 'B'),
|
||
the literal 'A' (VAL == 65), returns 0. */
|
||
|
||
static LONGEST
|
||
convert_char_literal (struct type *type, LONGEST val)
|
||
{
|
||
char name[7];
|
||
int f;
|
||
|
||
if (type == NULL)
|
||
return val;
|
||
type = check_typedef (type);
|
||
if (TYPE_CODE (type) != TYPE_CODE_ENUM)
|
||
return val;
|
||
|
||
xsnprintf (name, sizeof (name), "QU%02x", (int) val);
|
||
for (f = 0; f < TYPE_NFIELDS (type); f += 1)
|
||
{
|
||
if (strcmp (name, TYPE_FIELD_NAME (type, f)) == 0)
|
||
return TYPE_FIELD_ENUMVAL (type, f);
|
||
}
|
||
return val;
|
||
}
|
||
|
||
static struct type *
|
||
type_int (struct parser_state *par_state)
|
||
{
|
||
return parse_type (par_state)->builtin_int;
|
||
}
|
||
|
||
static struct type *
|
||
type_long (struct parser_state *par_state)
|
||
{
|
||
return parse_type (par_state)->builtin_long;
|
||
}
|
||
|
||
static struct type *
|
||
type_long_long (struct parser_state *par_state)
|
||
{
|
||
return parse_type (par_state)->builtin_long_long;
|
||
}
|
||
|
||
static struct type *
|
||
type_float (struct parser_state *par_state)
|
||
{
|
||
return parse_type (par_state)->builtin_float;
|
||
}
|
||
|
||
static struct type *
|
||
type_double (struct parser_state *par_state)
|
||
{
|
||
return parse_type (par_state)->builtin_double;
|
||
}
|
||
|
||
static struct type *
|
||
type_long_double (struct parser_state *par_state)
|
||
{
|
||
return parse_type (par_state)->builtin_long_double;
|
||
}
|
||
|
||
static struct type *
|
||
type_char (struct parser_state *par_state)
|
||
{
|
||
return language_string_char_type (parse_language (par_state),
|
||
parse_gdbarch (par_state));
|
||
}
|
||
|
||
static struct type *
|
||
type_boolean (struct parser_state *par_state)
|
||
{
|
||
return parse_type (par_state)->builtin_bool;
|
||
}
|
||
|
||
static struct type *
|
||
type_system_address (struct parser_state *par_state)
|
||
{
|
||
struct type *type
|
||
= language_lookup_primitive_type (parse_language (par_state),
|
||
parse_gdbarch (par_state),
|
||
"system__address");
|
||
return type != NULL ? type : parse_type (par_state)->builtin_data_ptr;
|
||
}
|
||
|
||
/* Provide a prototype to silence -Wmissing-prototypes. */
|
||
extern initialize_file_ftype _initialize_ada_exp;
|
||
|
||
void
|
||
_initialize_ada_exp (void)
|
||
{
|
||
obstack_init (&temp_parse_space);
|
||
}
|