--- /dev/null
+/* YACC parser for C expressions, for GDB.
+ Copyright (C) 1986, 1989, 1990, 1991, 1993, 1994
+ Free Software Foundation, Inc.
+
+This file is part of GDB.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+/* Parse a C expression from text in a string,
+ and return the result as a struct expression pointer.
+ That structure contains arithmetic operations in reverse polish,
+ with constants represented by operations that are followed by special data.
+ See expression.h for the details of the format.
+ What is important here is that it can be built up sequentially
+ during the process of parsing; the lower levels of the tree always
+ come first in the result.
+
+ Note that malloc's and realloc's in this file are transformed to
+ xmalloc and xrealloc respectively by the same sed command in the
+ makefile that remaps any other malloc/realloc inserted by the parser
+ generator. Doing this with #defines and trying to control the interaction
+ with include files (<malloc.h> and <stdlib.h> for example) just became
+ too messy, particularly when such includes can be inserted at random
+ times by the parser generator. */
+
+%{
+
+#include "defs.h"
+#include "gdb_string.h"
+#include <ctype.h>
+#include "expression.h"
+
+#include "objc-lang.h" /* for objc language constructs */
+
+#include "value.h"
+#include "parser-defs.h"
+#include "language.h"
+#include "c-lang.h"
+#include "bfd.h" /* Required by objfiles.h. */
+#include "symfile.h" /* Required by objfiles.h. */
+#include "objfiles.h" /* For have_full_symbols and have_partial_symbols */
+#include "top.h"
+#include "completer.h" /* For skip_quoted(). */
+
+/* Remap normal yacc parser interface names (yyparse, yylex, yyerror, etc),
+ as well as gratuitiously global symbol names, so we can have multiple
+ yacc generated parsers in gdb. Note that these are only the variables
+ produced by yacc. If other parser generators (bison, byacc, etc) produce
+ additional global names that conflict at link time, then those parser
+ generators need to be fixed instead of adding those names to this list. */
+
+#define yymaxdepth objc_maxdepth
+#define yyparse objc_parse
+#define yylex objc_lex
+#define yyerror objc_error
+#define yylval objc_lval
+#define yychar objc_char
+#define yydebug objc_debug
+#define yypact objc_pact
+#define yyr1 objc_r1
+#define yyr2 objc_r2
+#define yydef objc_def
+#define yychk objc_chk
+#define yypgo objc_pgo
+#define yyact objc_act
+#define yyexca objc_exca
+#define yyerrflag objc_errflag
+#define yynerrs objc_nerrs
+#define yyps objc_ps
+#define yypv objc_pv
+#define yys objc_s
+#define yy_yys objc_yys
+#define yystate objc_state
+#define yytmp objc_tmp
+#define yyv objc_v
+#define yy_yyv objc_yyv
+#define yyval objc_val
+#define yylloc objc_lloc
+#define yyreds objc_reds /* With YYDEBUG defined */
+#define yytoks objc_toks /* With YYDEBUG defined */
+#define yyname objc_name /* With YYDEBUG defined */
+#define yyrule objc_rule /* With YYDEBUG defined */
+#define yylhs objc_yylhs
+#define yylen objc_yylen
+#define yydefred objc_yydefred
+#define yydgoto objc_yydgoto
+#define yysindex objc_yysindex
+#define yyrindex objc_yyrindex
+#define yygindex objc_yygindex
+#define yytable objc_yytable
+#define yycheck objc_yycheck
+
+#ifndef YYDEBUG
+#define YYDEBUG 0 /* Default to no yydebug support */
+#endif
+
+int
+yyparse PARAMS ((void));
+
+static int
+yylex PARAMS ((void));
+
+void
+yyerror PARAMS ((char *));
+
+%}
+
+/* Although the yacc "value" of an expression is not used,
+ since the result is stored in the structure being created,
+ other node types do have values. */
+
+%union
+ {
+ LONGEST lval;
+ struct {
+ LONGEST val;
+ struct type *type;
+ } typed_val_int;
+ struct {
+ DOUBLEST dval;
+ struct type *type;
+ } typed_val_float;
+ struct symbol *sym;
+ struct type *tval;
+ struct stoken sval;
+ struct ttype tsym;
+ struct symtoken ssym;
+ int voidval;
+ struct block *bval;
+ enum exp_opcode opcode;
+ struct internalvar *ivar;
+ struct objc_class_str class;
+
+ struct type **tvec;
+ int *ivec;
+ }
+
+%{
+/* YYSTYPE gets defined by %union */
+static int
+parse_number PARAMS ((char *, int, int, YYSTYPE *));
+%}
+
+%type <voidval> exp exp1 type_exp start variable qualified_name lcurly
+%type <lval> rcurly
+%type <tval> type typebase
+%type <tvec> nonempty_typelist
+/* %type <bval> block */
+
+/* Fancy type parsing. */
+%type <voidval> func_mod direct_abs_decl abs_decl
+%type <tval> ptype
+%type <lval> array_mod
+
+%token <typed_val_int> INT
+%token <typed_val_float> FLOAT
+
+/* Both NAME and TYPENAME tokens represent symbols in the input,
+ and both convey their data as strings.
+ But a TYPENAME is a string that happens to be defined as a typedef
+ or builtin type name (such as int or char)
+ and a NAME is any other symbol.
+ Contexts where this distinction is not important can use the
+ nonterminal "name", which matches either NAME or TYPENAME. */
+
+%token <sval> STRING
+%token <sval> NSSTRING /* ObjC Foundation "NSString" literal */
+%token <sval> SELECTOR /* ObjC "@selector" pseudo-operator */
+%token <ssym> NAME /* BLOCKNAME defined below to give it higher precedence. */
+%token <tsym> TYPENAME
+%token <class> CLASSNAME /* ObjC Class name */
+%type <sval> name
+%type <ssym> name_not_typename
+%type <tsym> typename
+
+/* A NAME_OR_INT is a symbol which is not known in the symbol table,
+ but which would parse as a valid number in the current input radix.
+ E.g. "c" when input_radix==16. Depending on the parse, it will be
+ turned into a name or into a number. */
+
+%token <ssym> NAME_OR_INT
+
+%token STRUCT CLASS UNION ENUM SIZEOF UNSIGNED COLONCOLON
+%token TEMPLATE
+%token ERROR
+
+/* Special type cases, put in to allow the parser to distinguish different
+ legal basetypes. */
+%token SIGNED_KEYWORD LONG SHORT INT_KEYWORD CONST_KEYWORD VOLATILE_KEYWORD DOUBLE_KEYWORD
+
+%token <voidval> VARIABLE
+
+%token <opcode> ASSIGN_MODIFY
+
+/* C++ */
+%token THIS
+
+%left ','
+%left ABOVE_COMMA
+%right '=' ASSIGN_MODIFY
+%right '?'
+%left OROR
+%left ANDAND
+%left '|'
+%left '^'
+%left '&'
+%left EQUAL NOTEQUAL
+%left '<' '>' LEQ GEQ
+%left LSH RSH
+%left '@'
+%left '+' '-'
+%left '*' '/' '%'
+%right UNARY INCREMENT DECREMENT
+%right ARROW '.' '[' '('
+%token <ssym> BLOCKNAME
+%type <bval> block
+%left COLONCOLON
+
+\f
+%%
+
+start : exp1
+ | type_exp
+ ;
+
+type_exp: type
+ { write_exp_elt_opcode(OP_TYPE);
+ write_exp_elt_type($1);
+ write_exp_elt_opcode(OP_TYPE);}
+ ;
+
+/* Expressions, including the comma operator. */
+exp1 : exp
+ | exp1 ',' exp
+ { write_exp_elt_opcode (BINOP_COMMA); }
+ ;
+
+/* Expressions, not including the comma operator. */
+exp : '*' exp %prec UNARY
+ { write_exp_elt_opcode (UNOP_IND); }
+
+exp : '&' exp %prec UNARY
+ { write_exp_elt_opcode (UNOP_ADDR); }
+
+exp : '-' exp %prec UNARY
+ { write_exp_elt_opcode (UNOP_NEG); }
+ ;
+
+exp : '!' exp %prec UNARY
+ { write_exp_elt_opcode (UNOP_LOGICAL_NOT); }
+ ;
+
+exp : '~' exp %prec UNARY
+ { write_exp_elt_opcode (UNOP_COMPLEMENT); }
+ ;
+
+exp : INCREMENT exp %prec UNARY
+ { write_exp_elt_opcode (UNOP_PREINCREMENT); }
+ ;
+
+exp : DECREMENT exp %prec UNARY
+ { write_exp_elt_opcode (UNOP_PREDECREMENT); }
+ ;
+
+exp : exp INCREMENT %prec UNARY
+ { write_exp_elt_opcode (UNOP_POSTINCREMENT); }
+ ;
+
+exp : exp DECREMENT %prec UNARY
+ { write_exp_elt_opcode (UNOP_POSTDECREMENT); }
+ ;
+
+exp : SIZEOF exp %prec UNARY
+ { write_exp_elt_opcode (UNOP_SIZEOF); }
+ ;
+
+exp : exp ARROW name
+ { write_exp_elt_opcode (STRUCTOP_PTR);
+ write_exp_string ($3);
+ write_exp_elt_opcode (STRUCTOP_PTR); }
+ ;
+
+exp : exp ARROW qualified_name
+ { /* exp->type::name becomes exp->*(&type::name) */
+ /* Note: this doesn't work if name is a
+ static member! FIXME */
+ write_exp_elt_opcode (UNOP_ADDR);
+ write_exp_elt_opcode (STRUCTOP_MPTR); }
+ ;
+exp : exp ARROW '*' exp
+ { write_exp_elt_opcode (STRUCTOP_MPTR); }
+ ;
+
+exp : exp '.' name
+ { write_exp_elt_opcode (STRUCTOP_STRUCT);
+ write_exp_string ($3);
+ write_exp_elt_opcode (STRUCTOP_STRUCT); }
+ ;
+
+
+exp : exp '.' qualified_name
+ { /* exp.type::name becomes exp.*(&type::name) */
+ /* Note: this doesn't work if name is a
+ static member! FIXME */
+ write_exp_elt_opcode (UNOP_ADDR);
+ write_exp_elt_opcode (STRUCTOP_MEMBER); }
+ ;
+
+exp : exp '.' '*' exp
+ { write_exp_elt_opcode (STRUCTOP_MEMBER); }
+ ;
+
+exp : exp '[' exp1 ']'
+ { write_exp_elt_opcode (BINOP_SUBSCRIPT); }
+ ;
+/*
+ * The rules below parse ObjC message calls of the form:
+ * '[' target selector {':' argument}* ']'
+ */
+
+exp : '[' TYPENAME
+ {
+ CORE_ADDR class;
+
+ class = lookup_objc_class (copy_name ($2.stoken));
+ if (class == 0)
+ error ("%s is not an ObjC Class",
+ copy_name ($2.stoken));
+ write_exp_elt_opcode (OP_LONG);
+ write_exp_elt_type (builtin_type_int);
+ write_exp_elt_longcst ((LONGEST) class);
+ write_exp_elt_opcode (OP_LONG);
+ start_msglist();
+ }
+ msglist ']'
+ { write_exp_elt_opcode (OP_MSGCALL);
+ end_msglist();
+ write_exp_elt_opcode (OP_MSGCALL);
+ }
+ ;
+
+exp : '[' CLASSNAME
+ {
+ write_exp_elt_opcode (OP_LONG);
+ write_exp_elt_type (builtin_type_int);
+ write_exp_elt_longcst ((LONGEST) $2.class);
+ write_exp_elt_opcode (OP_LONG);
+ start_msglist();
+ }
+ msglist ']'
+ { write_exp_elt_opcode (OP_MSGCALL);
+ end_msglist();
+ write_exp_elt_opcode (OP_MSGCALL);
+ }
+ ;
+
+exp : '[' exp
+ { start_msglist(); }
+ msglist ']'
+ { write_exp_elt_opcode (OP_MSGCALL);
+ end_msglist();
+ write_exp_elt_opcode (OP_MSGCALL);
+ }
+ ;
+
+msglist : name
+ { add_msglist(&$1, 0); }
+ | msgarglist
+ ;
+
+msgarglist : msgarg
+ | msgarglist msgarg
+ ;
+
+msgarg : name ':' exp
+ { add_msglist(&$1, 1); }
+ | ':' exp /* unnamed arg */
+ { add_msglist(0, 1); }
+ | ',' exp /* variable number of args */
+ { add_msglist(0, 0); }
+ ;
+
+exp : exp '('
+ /* This is to save the value of arglist_len
+ being accumulated by an outer function call. */
+ { start_arglist (); }
+ arglist ')' %prec ARROW
+ { write_exp_elt_opcode (OP_FUNCALL);
+ write_exp_elt_longcst ((LONGEST) end_arglist ());
+ write_exp_elt_opcode (OP_FUNCALL); }
+ ;
+
+lcurly : '{'
+ { start_arglist (); }
+ ;
+
+arglist :
+ ;
+
+arglist : exp
+ { arglist_len = 1; }
+ ;
+
+arglist : arglist ',' exp %prec ABOVE_COMMA
+ { arglist_len++; }
+ ;
+
+rcurly : '}'
+ { $$ = end_arglist () - 1; }
+ ;
+exp : lcurly arglist rcurly %prec ARROW
+ { write_exp_elt_opcode (OP_ARRAY);
+ write_exp_elt_longcst ((LONGEST) 0);
+ write_exp_elt_longcst ((LONGEST) $3);
+ write_exp_elt_opcode (OP_ARRAY); }
+ ;
+
+exp : lcurly type rcurly exp %prec UNARY
+ { write_exp_elt_opcode (UNOP_MEMVAL);
+ write_exp_elt_type ($2);
+ write_exp_elt_opcode (UNOP_MEMVAL); }
+ ;
+
+exp : '(' type ')' exp %prec UNARY
+ { write_exp_elt_opcode (UNOP_CAST);
+ write_exp_elt_type ($2);
+ write_exp_elt_opcode (UNOP_CAST); }
+ ;
+
+exp : '(' exp1 ')'
+ { }
+ ;
+
+/* Binary operators in order of decreasing precedence. */
+
+exp : exp '@' exp
+ { write_exp_elt_opcode (BINOP_REPEAT); }
+ ;
+
+exp : exp '*' exp
+ { write_exp_elt_opcode (BINOP_MUL); }
+ ;
+
+exp : exp '/' exp
+ { write_exp_elt_opcode (BINOP_DIV); }
+ ;
+
+exp : exp '%' exp
+ { write_exp_elt_opcode (BINOP_REM); }
+ ;
+
+exp : exp '+' exp
+ { write_exp_elt_opcode (BINOP_ADD); }
+ ;
+
+exp : exp '-' exp
+ { write_exp_elt_opcode (BINOP_SUB); }
+ ;
+
+exp : exp LSH exp
+ { write_exp_elt_opcode (BINOP_LSH); }
+ ;
+
+exp : exp RSH exp
+ { write_exp_elt_opcode (BINOP_RSH); }
+ ;
+
+exp : exp EQUAL exp
+ { write_exp_elt_opcode (BINOP_EQUAL); }
+ ;
+
+exp : exp NOTEQUAL exp
+ { write_exp_elt_opcode (BINOP_NOTEQUAL); }
+ ;
+
+exp : exp LEQ exp
+ { write_exp_elt_opcode (BINOP_LEQ); }
+ ;
+
+exp : exp GEQ exp
+ { write_exp_elt_opcode (BINOP_GEQ); }
+ ;
+
+exp : exp '<' exp
+ { write_exp_elt_opcode (BINOP_LESS); }
+ ;
+
+exp : exp '>' exp
+ { write_exp_elt_opcode (BINOP_GTR); }
+ ;
+
+exp : exp '&' exp
+ { write_exp_elt_opcode (BINOP_BITWISE_AND); }
+ ;
+
+exp : exp '^' exp
+ { write_exp_elt_opcode (BINOP_BITWISE_XOR); }
+ ;
+
+exp : exp '|' exp
+ { write_exp_elt_opcode (BINOP_BITWISE_IOR); }
+ ;
+
+exp : exp ANDAND exp
+ { write_exp_elt_opcode (BINOP_LOGICAL_AND); }
+ ;
+
+exp : exp OROR exp
+ { write_exp_elt_opcode (BINOP_LOGICAL_OR); }
+ ;
+
+exp : exp '?' exp ':' exp %prec '?'
+ { write_exp_elt_opcode (TERNOP_COND); }
+ ;
+
+exp : exp '=' exp
+ { write_exp_elt_opcode (BINOP_ASSIGN); }
+ ;
+
+exp : exp ASSIGN_MODIFY exp
+ { write_exp_elt_opcode (BINOP_ASSIGN_MODIFY);
+ write_exp_elt_opcode ($2);
+ write_exp_elt_opcode (BINOP_ASSIGN_MODIFY); }
+ ;
+
+exp : INT
+ { write_exp_elt_opcode (OP_LONG);
+ write_exp_elt_type ($1.type);
+ write_exp_elt_longcst ((LONGEST)($1.val));
+ write_exp_elt_opcode (OP_LONG); }
+ ;
+
+exp : NAME_OR_INT
+ { YYSTYPE val;
+ parse_number ($1.stoken.ptr, $1.stoken.length, 0, &val);
+ write_exp_elt_opcode (OP_LONG);
+ write_exp_elt_type (val.typed_val_int.type);
+ write_exp_elt_longcst ((LONGEST)val.typed_val_int.val);
+ write_exp_elt_opcode (OP_LONG);
+ }
+ ;
+
+
+exp : FLOAT
+ { write_exp_elt_opcode (OP_DOUBLE);
+ write_exp_elt_type ($1.type);
+ write_exp_elt_dblcst ($1.dval);
+ write_exp_elt_opcode (OP_DOUBLE); }
+ ;
+
+exp : variable
+ ;
+
+exp : VARIABLE
+ /* Already written by write_dollar_variable. */
+ ;
+
+exp : SELECTOR
+ {
+ write_exp_elt_opcode (OP_SELECTOR);
+ write_exp_string ($1);
+ write_exp_elt_opcode (OP_SELECTOR); }
+
+exp : SIZEOF '(' type ')' %prec UNARY
+ { write_exp_elt_opcode (OP_LONG);
+ write_exp_elt_type (builtin_type_int);
+ CHECK_TYPEDEF ($3);
+ write_exp_elt_longcst ((LONGEST) TYPE_LENGTH ($3));
+ write_exp_elt_opcode (OP_LONG); }
+ ;
+
+exp : STRING
+ { /* C strings are converted into array constants with
+ an explicit null byte added at the end. Thus
+ the array upper bound is the string length.
+ There is no such thing in C as a completely empty
+ string. */
+ char *sp = $1.ptr; int count = $1.length;
+ while (count-- > 0)
+ {
+ write_exp_elt_opcode (OP_LONG);
+ write_exp_elt_type (builtin_type_char);
+ write_exp_elt_longcst ((LONGEST)(*sp++));
+ write_exp_elt_opcode (OP_LONG);
+ }
+ write_exp_elt_opcode (OP_LONG);
+ write_exp_elt_type (builtin_type_char);
+ write_exp_elt_longcst ((LONGEST)'\0');
+ write_exp_elt_opcode (OP_LONG);
+ write_exp_elt_opcode (OP_ARRAY);
+ write_exp_elt_longcst ((LONGEST) 0);
+ write_exp_elt_longcst ((LONGEST) ($1.length));
+ write_exp_elt_opcode (OP_ARRAY); }
+ ;
+
+exp : NSSTRING /* ObjC NextStep NSString constant
+ * of the form '@' '"' string '"'
+ */
+ { write_exp_elt_opcode (OP_NSSTRING);
+ write_exp_string ($1);
+ write_exp_elt_opcode (OP_NSSTRING); }
+ ;
+
+/* C++. */
+exp : THIS
+ { write_exp_elt_opcode (OP_THIS);
+ write_exp_elt_opcode (OP_THIS); }
+ ;
+
+/* end of C++. */
+
+block : BLOCKNAME
+ {
+ if ($1.sym != 0)
+ $$ = SYMBOL_BLOCK_VALUE ($1.sym);
+ else
+ {
+ struct symtab *tem =
+ lookup_symtab (copy_name ($1.stoken));
+ if (tem)
+ $$ = BLOCKVECTOR_BLOCK (BLOCKVECTOR (tem), STATIC_BLOCK);
+ else
+ error ("No file or function \"%s\".",
+ copy_name ($1.stoken));
+ }
+ }
+ ;
+
+block : block COLONCOLON name
+ { struct symbol *tem
+ = lookup_symbol (copy_name ($3), $1,
+ VAR_NAMESPACE, (int *) NULL,
+ (struct symtab **) NULL);
+ if (!tem || SYMBOL_CLASS (tem) != LOC_BLOCK)
+ error ("No function \"%s\" in specified context.",
+ copy_name ($3));
+ $$ = SYMBOL_BLOCK_VALUE (tem); }
+ ;
+
+variable: block COLONCOLON name
+ { struct symbol *sym;
+ sym = lookup_symbol (copy_name ($3), $1,
+ VAR_NAMESPACE, (int *) NULL,
+ (struct symtab **) NULL);
+ if (sym == 0)
+ error ("No symbol \"%s\" in specified context.",
+ copy_name ($3));
+
+ write_exp_elt_opcode (OP_VAR_VALUE);
+ /* block_found is set by lookup_symbol. */
+ write_exp_elt_block (block_found);
+ write_exp_elt_sym (sym);
+ write_exp_elt_opcode (OP_VAR_VALUE); }
+ ;
+
+qualified_name: typebase COLONCOLON name
+ {
+ struct type *type = $1;
+ if (TYPE_CODE (type) != TYPE_CODE_STRUCT
+ && TYPE_CODE (type) != TYPE_CODE_UNION)
+ error ("`%s' is not defined as an aggregate type.",
+ TYPE_NAME (type));
+
+ write_exp_elt_opcode (OP_SCOPE);
+ write_exp_elt_type (type);
+ write_exp_string ($3);
+ write_exp_elt_opcode (OP_SCOPE);
+ }
+ | typebase COLONCOLON '~' name
+ {
+ struct type *type = $1;
+ struct stoken tmp_token;
+ if (TYPE_CODE (type) != TYPE_CODE_STRUCT
+ && TYPE_CODE (type) != TYPE_CODE_UNION)
+ error ("`%s' is not defined as an aggregate type.",
+ TYPE_NAME (type));
+
+ if (!STREQ (type_name_no_tag (type), $4.ptr))
+ error ("invalid destructor `%s::~%s'",
+ type_name_no_tag (type), $4.ptr);
+
+ tmp_token.ptr = (char*) alloca ($4.length + 2);
+ tmp_token.length = $4.length + 1;
+ tmp_token.ptr[0] = '~';
+ memcpy (tmp_token.ptr+1, $4.ptr, $4.length);
+ tmp_token.ptr[tmp_token.length] = 0;
+ write_exp_elt_opcode (OP_SCOPE);
+ write_exp_elt_type (type);
+ write_exp_string (tmp_token);
+ write_exp_elt_opcode (OP_SCOPE);
+ }
+ ;
+
+variable: qualified_name
+ | COLONCOLON name
+ {
+ char *name = copy_name ($2);
+ struct symbol *sym;
+ struct minimal_symbol *msymbol;
+
+ sym =
+ lookup_symbol (name, (const struct block *) NULL,
+ VAR_NAMESPACE, (int *) NULL,
+ (struct symtab **) NULL);
+ if (sym)
+ {
+ write_exp_elt_opcode (OP_VAR_VALUE);
+ write_exp_elt_block (NULL);
+ write_exp_elt_sym (sym);
+ write_exp_elt_opcode (OP_VAR_VALUE);
+ break;
+ }
+
+ msymbol = lookup_minimal_symbol (name, NULL, NULL);
+ if (msymbol != NULL)
+ {
+ write_exp_msymbol (msymbol,
+ lookup_function_type (builtin_type_int),
+ builtin_type_int);
+ }
+ else
+ if (!have_full_symbols () && !have_partial_symbols ())
+ error ("No symbol table is loaded. Use the \"file\" command.");
+ else
+ error ("No symbol \"%s\" in current context.", name);
+ }
+ ;
+
+variable: name_not_typename
+ { struct symbol *sym = $1.sym;
+
+ if (sym)
+ {
+ if (symbol_read_needs_frame (sym))
+ {
+ if (innermost_block == 0 ||
+ contained_in (block_found,
+ innermost_block))
+ innermost_block = block_found;
+ }
+
+ write_exp_elt_opcode (OP_VAR_VALUE);
+ /* We want to use the selected frame, not
+ another more inner frame which happens to
+ be in the same block. */
+ write_exp_elt_block (NULL);
+ write_exp_elt_sym (sym);
+ write_exp_elt_opcode (OP_VAR_VALUE);
+ }
+ else if ($1.is_a_field_of_this)
+ {
+ /* C++/ObjC: it hangs off of `this'/'self'.
+ Must not inadvertently convert from a
+ method call to data ref. */
+ if (innermost_block == 0 ||
+ contained_in (block_found, innermost_block))
+ innermost_block = block_found;
+ write_exp_elt_opcode (OP_SELF);
+ write_exp_elt_opcode (OP_SELF);
+ write_exp_elt_opcode (STRUCTOP_PTR);
+ write_exp_string ($1.stoken);
+ write_exp_elt_opcode (STRUCTOP_PTR);
+ }
+ else
+ {
+ struct minimal_symbol *msymbol;
+ register char *arg = copy_name ($1.stoken);
+
+ msymbol =
+ lookup_minimal_symbol (arg, NULL, NULL);
+ if (msymbol != NULL)
+ {
+ write_exp_msymbol (msymbol,
+ lookup_function_type (builtin_type_int),
+ builtin_type_int);
+ }
+ else if (!have_full_symbols () &&
+ !have_partial_symbols ())
+ error ("No symbol table is loaded. Use the \"file\" command.");
+ else
+ error ("No symbol \"%s\" in current context.",
+ copy_name ($1.stoken));
+ }
+ }
+ ;
+
+
+ptype : typebase
+ /* "const" and "volatile" are curently ignored. A type qualifier
+ before the type is currently handled in the typebase rule.
+ The reason for recognizing these here (shift/reduce conflicts)
+ might be obsolete now that some pointer to member rules have
+ been deleted. */
+ | typebase CONST_KEYWORD
+ | typebase VOLATILE_KEYWORD
+ | typebase abs_decl
+ { $$ = follow_types ($1); }
+ | typebase CONST_KEYWORD abs_decl
+ { $$ = follow_types ($1); }
+ | typebase VOLATILE_KEYWORD abs_decl
+ { $$ = follow_types ($1); }
+ ;
+
+abs_decl: '*'
+ { push_type (tp_pointer); $$ = 0; }
+ | '*' abs_decl
+ { push_type (tp_pointer); $$ = $2; }
+ | '&'
+ { push_type (tp_reference); $$ = 0; }
+ | '&' abs_decl
+ { push_type (tp_reference); $$ = $2; }
+ | direct_abs_decl
+ ;
+
+direct_abs_decl: '(' abs_decl ')'
+ { $$ = $2; }
+ | direct_abs_decl array_mod
+ {
+ push_type_int ($2);
+ push_type (tp_array);
+ }
+ | array_mod
+ {
+ push_type_int ($1);
+ push_type (tp_array);
+ $$ = 0;
+ }
+
+ | direct_abs_decl func_mod
+ { push_type (tp_function); }
+ | func_mod
+ { push_type (tp_function); }
+ ;
+
+array_mod: '[' ']'
+ { $$ = -1; }
+ | '[' INT ']'
+ { $$ = $2.val; }
+ ;
+
+func_mod: '(' ')'
+ { $$ = 0; }
+ | '(' nonempty_typelist ')'
+ { free ((PTR)$2); $$ = 0; }
+ ;
+
+/* We used to try to recognize more pointer to member types here, but
+ that didn't work (shift/reduce conflicts meant that these rules never
+ got executed). The problem is that
+ int (foo::bar::baz::bizzle)
+ is a function type but
+ int (foo::bar::baz::bizzle::*)
+ is a pointer to member type. Stroustrup loses again! */
+
+type : ptype
+ | typebase COLONCOLON '*'
+ { $$ = lookup_member_type (builtin_type_int, $1); }
+ ;
+
+typebase /* Implements (approximately): (type-qualifier)* type-specifier */
+ : TYPENAME
+ { $$ = $1.type; }
+ | CLASSNAME
+ {
+ if ($1.type == NULL)
+ error ("No symbol \"%s\" in current context.",
+ copy_name($1.stoken));
+ else
+ $$ = $1.type;
+ }
+ | INT_KEYWORD
+ { $$ = builtin_type_int; }
+ | LONG
+ { $$ = builtin_type_long; }
+ | SHORT
+ { $$ = builtin_type_short; }
+ | LONG INT_KEYWORD
+ { $$ = builtin_type_long; }
+ | UNSIGNED LONG INT_KEYWORD
+ { $$ = builtin_type_unsigned_long; }
+ | LONG LONG
+ { $$ = builtin_type_long_long; }
+ | LONG LONG INT_KEYWORD
+ { $$ = builtin_type_long_long; }
+ | UNSIGNED LONG LONG
+ { $$ = builtin_type_unsigned_long_long; }
+ | UNSIGNED LONG LONG INT_KEYWORD
+ { $$ = builtin_type_unsigned_long_long; }
+ | SHORT INT_KEYWORD
+ { $$ = builtin_type_short; }
+ | UNSIGNED SHORT INT_KEYWORD
+ { $$ = builtin_type_unsigned_short; }
+ | DOUBLE_KEYWORD
+ { $$ = builtin_type_double; }
+ | LONG DOUBLE_KEYWORD
+ { $$ = builtin_type_long_double; }
+ | STRUCT name
+ { $$ = lookup_struct (copy_name ($2),
+ expression_context_block); }
+ | CLASS name
+ { $$ = lookup_struct (copy_name ($2),
+ expression_context_block); }
+ | UNION name
+ { $$ = lookup_union (copy_name ($2),
+ expression_context_block); }
+ | ENUM name
+ { $$ = lookup_enum (copy_name ($2),
+ expression_context_block); }
+ | UNSIGNED typename
+ { $$ = lookup_unsigned_typename (TYPE_NAME($2.type)); }
+ | UNSIGNED
+ { $$ = builtin_type_unsigned_int; }
+ | SIGNED_KEYWORD typename
+ { $$ = lookup_signed_typename (TYPE_NAME($2.type)); }
+ | SIGNED_KEYWORD
+ { $$ = builtin_type_int; }
+ | TEMPLATE name '<' type '>'
+ { $$ = lookup_template_type(copy_name($2), $4,
+ expression_context_block);
+ }
+ /* "const" and "volatile" are curently ignored. A type qualifier
+ after the type is handled in the ptype rule. I think these could
+ be too. */
+ | CONST_KEYWORD typebase { $$ = $2; }
+ | VOLATILE_KEYWORD typebase { $$ = $2; }
+ ;
+
+typename: TYPENAME
+ | INT_KEYWORD
+ {
+ $$.stoken.ptr = "int";
+ $$.stoken.length = 3;
+ $$.type = builtin_type_int;
+ }
+ | LONG
+ {
+ $$.stoken.ptr = "long";
+ $$.stoken.length = 4;
+ $$.type = builtin_type_long;
+ }
+ | SHORT
+ {
+ $$.stoken.ptr = "short";
+ $$.stoken.length = 5;
+ $$.type = builtin_type_short;
+ }
+ ;
+
+nonempty_typelist
+ : type
+ { $$ = (struct type **) malloc (sizeof (struct type *) * 2);
+ $<ivec>$[0] = 1; /* Number of types in vector */
+ $$[1] = $1;
+ }
+ | nonempty_typelist ',' type
+ { int len = sizeof (struct type *) * (++($<ivec>1[0]) + 1);
+ $$ = (struct type **) realloc ((char *) $1, len);
+ $$[$<ivec>$[0]] = $3;
+ }
+ ;
+
+name : NAME { $$ = $1.stoken; }
+ | BLOCKNAME { $$ = $1.stoken; }
+ | TYPENAME { $$ = $1.stoken; }
+ | CLASSNAME { $$ = $1.stoken; }
+ | NAME_OR_INT { $$ = $1.stoken; }
+ ;
+
+name_not_typename : NAME
+ | BLOCKNAME
+/* These would be useful if name_not_typename was useful, but it is just
+ a fake for "variable", so these cause reduce/reduce conflicts because
+ the parser can't tell whether NAME_OR_INT is a name_not_typename (=variable,
+ =exp) or just an exp. If name_not_typename was ever used in an lvalue
+ context where only a name could occur, this might be useful.
+ | NAME_OR_INT
+ */
+ ;
+
+%%
+
+/* Take care of parsing a number (anything that starts with a digit).
+ Set yylval and return the token type; update lexptr.
+ LEN is the number of characters in it. */
+
+/*** Needs some error checking for the float case ***/
+
+static int
+parse_number (p, len, parsed_float, putithere)
+ register char *p;
+ register int len;
+ int parsed_float;
+ YYSTYPE *putithere;
+{
+ /* FIXME: Shouldn't these be unsigned? We don't deal with negative values
+ here, and we do kind of silly things like cast to unsigned. */
+ register LONGEST n = 0;
+ register LONGEST prevn = 0;
+ unsigned LONGEST un;
+
+ register int i = 0;
+ register int c;
+ register int base = input_radix;
+ int unsigned_p = 0;
+
+ /* Number of "L" suffixes encountered. */
+ int long_p = 0;
+
+ /* We have found a "L" or "U" suffix. */
+ int found_suffix = 0;
+
+ unsigned LONGEST high_bit;
+ struct type *signed_type;
+ struct type *unsigned_type;
+
+ if (parsed_float)
+ {
+ char c;
+
+ /* It's a float since it contains a point or an exponent. */
+
+ if (sizeof (putithere->typed_val_float.dval) <= sizeof (float))
+ sscanf (p, "%g", &putithere->typed_val_float.dval);
+ else if (sizeof (putithere->typed_val_float.dval) <= sizeof (double))
+ sscanf (p, "%lg", &putithere->typed_val_float.dval);
+ else
+ {
+#ifdef PRINTF_HAS_LONG_DOUBLE
+ sscanf (p, "%Lg", &putithere->typed_val_float.dval);
+#else
+ /* Scan it into a double, then assign it to the long double.
+ This at least wins with values representable in the range
+ of doubles. */
+ double temp;
+ sscanf (p, "%lg", &temp);
+ putithere->typed_val_float.dval = temp;
+#endif
+ }
+
+ /* See if it has `f' or `l' suffix (float or long double). */
+
+ c = tolower (p[len - 1]);
+
+ if (c == 'f')
+ putithere->typed_val_float.type = builtin_type_float;
+ else if (c == 'l')
+ putithere->typed_val_float.type = builtin_type_long_double;
+ else if (isdigit (c) || c == '.')
+ putithere->typed_val_float.type = builtin_type_double;
+ else
+ return ERROR;
+
+ return FLOAT;
+ }
+
+ /* Handle base-switching prefixes 0x, 0t, 0d, 0 */
+ if (p[0] == '0')
+ switch (p[1])
+ {
+ case 'x':
+ case 'X':
+ if (len >= 3)
+ {
+ p += 2;
+ base = 16;
+ len -= 2;
+ }
+ break;
+
+ case 't':
+ case 'T':
+ case 'd':
+ case 'D':
+ if (len >= 3)
+ {
+ p += 2;
+ base = 10;
+ len -= 2;
+ }
+ break;
+
+ default:
+ base = 8;
+ break;
+ }
+
+ while (len-- > 0)
+ {
+ c = *p++;
+ if (c >= 'A' && c <= 'Z')
+ c += 'a' - 'A';
+ if (c != 'l' && c != 'u')
+ n *= base;
+ if (c >= '0' && c <= '9')
+ {
+ if (found_suffix)
+ return ERROR;
+ n += i = c - '0';
+ }
+ else
+ {
+ if (base > 10 && c >= 'a' && c <= 'f')
+ {
+ if (found_suffix)
+ return ERROR;
+ n += i = c - 'a' + 10;
+ }
+ else if (c == 'l')
+ {
+ ++long_p;
+ found_suffix = 1;
+ }
+ else if (c == 'u')
+ {
+ unsigned_p = 1;
+ found_suffix = 1;
+ }
+ else
+ return ERROR; /* Char not a digit */
+ }
+ if (i >= base)
+ return ERROR; /* Invalid digit in this base */
+
+ /* Portably test for overflow (only works for nonzero values, so make
+ a second check for zero). FIXME: Can't we just make n and prevn
+ unsigned and avoid this? */
+ if (c != 'l' && c != 'u' && (prevn >= n) && n != 0)
+ unsigned_p = 1; /* Try something unsigned */
+
+ /* Portably test for unsigned overflow.
+ FIXME: This check is wrong; for example it doesn't find overflow
+ on 0x123456789 when LONGEST is 32 bits. */
+ if (c != 'l' && c != 'u' && n != 0)
+ {
+ if ((unsigned_p && (unsigned LONGEST) prevn >= (unsigned LONGEST) n))
+ error ("Numeric constant too large.");
+ }
+ prevn = n;
+ }
+
+ /* An integer constant is an int, a long, or a long long. An L
+ suffix forces it to be long; an LL suffix forces it to be long
+ long. If not forced to a larger size, it gets the first type of
+ the above that it fits in. To figure out whether it fits, we
+ shift it right and see whether anything remains. Note that we
+ can't shift sizeof (LONGEST) * HOST_CHAR_BIT bits or more in one
+ operation, because many compilers will warn about such a shift
+ (which always produces a zero result). Sometimes TARGET_INT_BIT
+ or TARGET_LONG_BIT will be that big, sometimes not. To deal with
+ the case where it is we just always shift the value more than
+ once, with fewer bits each time. */
+
+ un = (unsigned LONGEST)n >> 2;
+ if (long_p == 0
+ && (un >> (TARGET_INT_BIT - 2)) == 0)
+ {
+ high_bit = ((unsigned LONGEST)1) << (TARGET_INT_BIT-1);
+
+ /* A large decimal (not hex or octal) constant (between INT_MAX
+ and UINT_MAX) is a long or unsigned long, according to ANSI,
+ never an unsigned int, but this code treats it as unsigned
+ int. This probably should be fixed. GCC gives a warning on
+ such constants. */
+
+ unsigned_type = builtin_type_unsigned_int;
+ signed_type = builtin_type_int;
+ }
+ else if (long_p <= 1
+ && (un >> (TARGET_LONG_BIT - 2)) == 0)
+ {
+ high_bit = ((unsigned LONGEST)1) << (TARGET_LONG_BIT-1);
+ unsigned_type = builtin_type_unsigned_long;
+ signed_type = builtin_type_long;
+ }
+ else
+ {
+ high_bit = (((unsigned LONGEST)1)
+ << (TARGET_LONG_LONG_BIT - 32 - 1)
+ << 16
+ << 16);
+ if (high_bit == 0)
+ /* A long long does not fit in a LONGEST. */
+ high_bit =
+ (unsigned LONGEST)1 << (sizeof (LONGEST) * HOST_CHAR_BIT - 1);
+ unsigned_type = builtin_type_unsigned_long_long;
+ signed_type = builtin_type_long_long;
+ }
+
+ putithere->typed_val_int.val = n;
+
+ /* If the high bit of the worked out type is set then this number
+ has to be unsigned. */
+
+ if (unsigned_p || (n & high_bit))
+ {
+ putithere->typed_val_int.type = unsigned_type;
+ }
+ else
+ {
+ putithere->typed_val_int.type = signed_type;
+ }
+
+ return INT;
+}
+
+struct token
+{
+ char *operator;
+ int token;
+ enum exp_opcode opcode;
+};
+
+static const struct token tokentab3[] =
+ {
+ {">>=", ASSIGN_MODIFY, BINOP_RSH},
+ {"<<=", ASSIGN_MODIFY, BINOP_LSH}
+ };
+
+static const struct token tokentab2[] =
+ {
+ {"+=", ASSIGN_MODIFY, BINOP_ADD},
+ {"-=", ASSIGN_MODIFY, BINOP_SUB},
+ {"*=", ASSIGN_MODIFY, BINOP_MUL},
+ {"/=", ASSIGN_MODIFY, BINOP_DIV},
+ {"%=", ASSIGN_MODIFY, BINOP_REM},
+ {"|=", ASSIGN_MODIFY, BINOP_BITWISE_IOR},
+ {"&=", ASSIGN_MODIFY, BINOP_BITWISE_AND},
+ {"^=", ASSIGN_MODIFY, BINOP_BITWISE_XOR},
+ {"++", INCREMENT, BINOP_END},
+ {"--", DECREMENT, BINOP_END},
+ {"->", ARROW, BINOP_END},
+ {"&&", ANDAND, BINOP_END},
+ {"||", OROR, BINOP_END},
+ {"::", COLONCOLON, BINOP_END},
+ {"<<", LSH, BINOP_END},
+ {">>", RSH, BINOP_END},
+ {"==", EQUAL, BINOP_END},
+ {"!=", NOTEQUAL, BINOP_END},
+ {"<=", LEQ, BINOP_END},
+ {">=", GEQ, BINOP_END}
+ };
+
+/* Read one token, getting characters through lexptr. */
+
+static int
+yylex ()
+{
+ int c, tokchr;
+ int namelen;
+ unsigned int i;
+ char *tokstart;
+ char *tokptr;
+ int tempbufindex;
+ static char *tempbuf;
+ static int tempbufsize;
+
+ retry:
+
+ tokstart = lexptr;
+ /* See if it is a special token of length 3. */
+ for (i = 0; i < sizeof tokentab3 / sizeof tokentab3[0]; i++)
+ if (STREQN (tokstart, tokentab3[i].operator, 3))
+ {
+ lexptr += 3;
+ yylval.opcode = tokentab3[i].opcode;
+ return tokentab3[i].token;
+ }
+
+ /* See if it is a special token of length 2. */
+ for (i = 0; i < sizeof tokentab2 / sizeof tokentab2[0]; i++)
+ if (STREQN (tokstart, tokentab2[i].operator, 2))
+ {
+ lexptr += 2;
+ yylval.opcode = tokentab2[i].opcode;
+ return tokentab2[i].token;
+ }
+
+ switch (tokchr = *tokstart)
+ {
+ case 0:
+ return 0;
+
+ case ' ':
+ case '\t':
+ case '\n':
+ lexptr++;
+ goto retry;
+
+ case '\'':
+ /* We either have a character constant ('0' or '\177' for example)
+ or we have a quoted symbol reference ('foo(int,int)' in C++
+ for example). */
+ lexptr++;
+ c = *lexptr++;
+ if (c == '\\')
+ c = parse_escape (&lexptr);
+ else if (c == '\'')
+ error ("Empty character constant.");
+
+ yylval.typed_val_int.val = c;
+ yylval.typed_val_int.type = builtin_type_char;
+
+ c = *lexptr++;
+ if (c != '\'')
+ {
+ namelen = skip_quoted (tokstart,
+ get_gdb_completer_word_break_characters())
+ - tokstart;
+ if (namelen > 2)
+ {
+ lexptr = tokstart + namelen;
+ if (lexptr[-1] != '\'')
+ error ("Unmatched single quote.");
+ namelen -= 2;
+ tokstart++;
+ goto tryname;
+ }
+ error ("Invalid character constant.");
+ }
+ return INT;
+
+ case '(':
+ paren_depth++;
+ lexptr++;
+ return '(';
+
+ case ')':
+ if (paren_depth == 0)
+ return 0;
+ paren_depth--;
+ lexptr++;
+ return ')';
+
+ case ',':
+ if (comma_terminates && paren_depth == 0)
+ return 0;
+ lexptr++;
+ return ',';
+
+ case '.':
+ /* Might be a floating point number. */
+ if (lexptr[1] < '0' || lexptr[1] > '9')
+ goto symbol; /* Nope, must be a symbol. */
+ /* FALL THRU into number case. */
+
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ {
+ /* It's a number. */
+ int got_dot = 0, got_e = 0, toktype = FLOAT;
+ /* initialize toktype to anything other than ERROR. */
+ register char *p = tokstart;
+ int hex = input_radix > 10;
+ int local_radix = input_radix;
+ if (tokchr == '0' && (p[1] == 'x' || p[1] == 'X'))
+ {
+ p += 2;
+ hex = 1;
+ local_radix = 16;
+ }
+ else if (tokchr == '0' && (p[1]=='t' || p[1]=='T' || p[1]=='d' || p[1]=='D'))
+ {
+ p += 2;
+ hex = 0;
+ local_radix = 10;
+ }
+
+ for (;; ++p)
+ {
+ /* This test includes !hex because 'e' is a valid hex digit
+ and thus does not indicate a floating point number when
+ the radix is hex. */
+
+ if (!hex && (*p == 'e' || *p == 'E'))
+ if (got_e)
+ toktype = ERROR; /* only one 'e' in a float */
+ else
+ got_e = 1;
+ /* This test does not include !hex, because a '.' always indicates
+ a decimal floating point number regardless of the radix. */
+ else if (*p == '.')
+ if (got_dot)
+ toktype = ERROR; /* only one '.' in a float */
+ else
+ got_dot = 1;
+ else if (got_e && (p[-1] == 'e' || p[-1] == 'E') &&
+ (*p == '-' || *p == '+'))
+ /* This is the sign of the exponent, not the end of the
+ number. */
+ continue;
+ /* Always take decimal digits; parse_number handles radix error */
+ else if (*p >= '0' && *p <= '9')
+ continue;
+ /* We will take letters only if hex is true, and only
+ up to what the input radix would permit. FSF was content
+ to rely on parse_number to validate; but it leaks. */
+ else if (*p >= 'a' && *p <= 'z') {
+ if (!hex || *p >= ('a' + local_radix - 10))
+ toktype = ERROR;
+ }
+ else if (*p >= 'A' && *p <= 'Z') {
+ if (!hex || *p >= ('A' + local_radix - 10))
+ toktype = ERROR;
+ }
+ else break;
+ }
+ if (toktype != ERROR)
+ toktype = parse_number (tokstart, p - tokstart, got_dot|got_e, &yylval);
+ if (toktype == ERROR)
+ {
+ char *err_copy = (char *) alloca (p - tokstart + 1);
+
+ memcpy (err_copy, tokstart, p - tokstart);
+ err_copy[p - tokstart] = 0;
+ error ("Invalid number \"%s\".", err_copy);
+ }
+ lexptr = p;
+ return toktype;
+ }
+
+ case '+':
+ case '-':
+ case '*':
+ case '/':
+ case '%':
+ case '|':
+ case '&':
+ case '^':
+ case '~':
+ case '!':
+#if 0
+ case '@': /* moved out below */
+#endif
+ case '<':
+ case '>':
+ case '[':
+ case ']':
+ case '?':
+ case ':':
+ case '=':
+ case '{':
+ case '}':
+ symbol:
+ lexptr++;
+ return tokchr;
+
+ case '@':
+ if (strncmp(tokstart, "@selector", 9) == 0)
+ {
+ tokptr = strchr(tokstart, '(');
+ if (tokptr == NULL)
+ {
+ error ("Missing '(' in @selector(...)");
+ }
+ tempbufindex = 0;
+ tokptr++; /* skip the '(' */
+ do {
+ /* Grow the static temp buffer if necessary, including allocating
+ the first one on demand. */
+ if (tempbufindex + 1 >= tempbufsize)
+ {
+ tempbuf = (char *) realloc (tempbuf, tempbufsize += 64);
+ }
+ tempbuf[tempbufindex++] = *tokptr++;
+ } while ((*tokptr != ')') && (*tokptr != '\0'));
+ if (*tokptr++ != ')')
+ {
+ error ("Missing ')' in @selector(...)");
+ }
+ tempbuf[tempbufindex] = '\0';
+ yylval.sval.ptr = tempbuf;
+ yylval.sval.length = tempbufindex;
+ lexptr = tokptr;
+ return SELECTOR;
+ }
+ if (tokstart[1] != '"')
+ {
+ lexptr++;
+ return tokchr;
+ }
+ /* ObjC NextStep NSString constant: fall thru and parse like STRING */
+ tokstart++;
+
+ case '"':
+
+ /* Build the gdb internal form of the input string in tempbuf,
+ translating any standard C escape forms seen. Note that the
+ buffer is null byte terminated *only* for the convenience of
+ debugging gdb itself and printing the buffer contents when
+ the buffer contains no embedded nulls. Gdb does not depend
+ upon the buffer being null byte terminated, it uses the length
+ string instead. This allows gdb to handle C strings (as well
+ as strings in other languages) with embedded null bytes */
+
+ tokptr = ++tokstart;
+ tempbufindex = 0;
+
+ do {
+ /* Grow the static temp buffer if necessary, including allocating
+ the first one on demand. */
+ if (tempbufindex + 1 >= tempbufsize)
+ {
+ tempbuf = (char *) realloc (tempbuf, tempbufsize += 64);
+ }
+ switch (*tokptr)
+ {
+ case '\0':
+ case '"':
+ /* Do nothing, loop will terminate. */
+ break;
+ case '\\':
+ tokptr++;
+ c = parse_escape (&tokptr);
+ if (c == -1)
+ {
+ continue;
+ }
+ tempbuf[tempbufindex++] = c;
+ break;
+ default:
+ tempbuf[tempbufindex++] = *tokptr++;
+ break;
+ }
+ } while ((*tokptr != '"') && (*tokptr != '\0'));
+ if (*tokptr++ != '"')
+ {
+ error ("Unterminated string in expression.");
+ }
+ tempbuf[tempbufindex] = '\0'; /* See note above */
+ yylval.sval.ptr = tempbuf;
+ yylval.sval.length = tempbufindex;
+ lexptr = tokptr;
+ return (tokchr == '@' ? NSSTRING : STRING);
+ }
+
+ if (!(tokchr == '_' || tokchr == '$' ||
+ (tokchr >= 'a' && tokchr <= 'z') || (tokchr >= 'A' && tokchr <= 'Z')))
+ /* We must have come across a bad character (e.g. ';'). */
+ error ("Invalid character '%c' in expression.", c);
+
+ /* It's a name. See how long it is. */
+ namelen = 0;
+ for (c = tokstart[namelen];
+ (c == '_' || c == '$' || (c >= '0' && c <= '9')
+ || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || c == '<');)
+ {
+ if (c == '<')
+ {
+ int i = namelen;
+ while (tokstart[++i] && tokstart[i] != '>');
+ if (tokstart[i] == '>')
+ namelen = i;
+ }
+ c = tokstart[++namelen];
+ }
+
+ /* The token "if" terminates the expression and is NOT
+ removed from the input stream. */
+ if (namelen == 2 && tokstart[0] == 'i' && tokstart[1] == 'f')
+ {
+ return 0;
+ }
+
+ lexptr += namelen;
+
+ tryname:
+
+ /* Catch specific keywords. Should be done with a data structure. */
+ switch (namelen)
+ {
+ case 8:
+ if (STREQN (tokstart, "unsigned", 8))
+ return UNSIGNED;
+ if (current_language->la_language == language_cplus
+ && STREQN (tokstart, "template", 8))
+ return TEMPLATE;
+ if (STREQN (tokstart, "volatile", 8))
+ return VOLATILE_KEYWORD;
+ break;
+ case 6:
+ if (STREQN (tokstart, "struct", 6))
+ return STRUCT;
+ if (STREQN (tokstart, "signed", 6))
+ return SIGNED_KEYWORD;
+ if (STREQN (tokstart, "sizeof", 6))
+ return SIZEOF;
+ if (STREQN (tokstart, "double", 6))
+ return DOUBLE_KEYWORD;
+ break;
+ case 5:
+ if ((current_language->la_language == language_cplus)
+ && STREQN (tokstart, "class", 5))
+ return CLASS;
+ if (STREQN (tokstart, "union", 5))
+ return UNION;
+ if (STREQN (tokstart, "short", 5))
+ return SHORT;
+ if (STREQN (tokstart, "const", 5))
+ return CONST_KEYWORD;
+ break;
+ case 4:
+ if (STREQN (tokstart, "enum", 4))
+ return ENUM;
+ if (STREQN (tokstart, "long", 4))
+ return LONG;
+ if (current_language->la_language == language_cplus
+ && STREQN (tokstart, "this", 4))
+ {
+ static const char this_name[] =
+ { CPLUS_MARKER, 't', 'h', 'i', 's', '\0' };
+
+ if (lookup_symbol (this_name, expression_context_block,
+ VAR_NAMESPACE, (int *) NULL,
+ (struct symtab **) NULL))
+ return THIS;
+ }
+ break;
+ case 3:
+ if (STREQN (tokstart, "int", 3))
+ return INT_KEYWORD;
+ break;
+ default:
+ break;
+ }
+
+ yylval.sval.ptr = tokstart;
+ yylval.sval.length = namelen;
+
+ if (*tokstart == '$')
+ {
+ write_dollar_variable (yylval.sval);
+ return VARIABLE;
+ }
+
+ /* Use token-type BLOCKNAME for symbols that happen to be defined as
+ functions or symtabs. If this is not so, then ...
+ Use token-type TYPENAME for symbols that happen to be defined
+ currently as names of types; NAME for other symbols.
+ The caller is not constrained to care about the distinction. */
+ {
+ char *tmp = copy_name (yylval.sval);
+ struct symbol *sym;
+ int is_a_field_of_this = 0, *need_this;
+ int hextype;
+
+ if (current_language->la_language == language_cplus ||
+ current_language->la_language == language_objc)
+ need_this = &is_a_field_of_this;
+ else
+ need_this = (int *) NULL;
+
+ sym = lookup_symbol (tmp, expression_context_block,
+ VAR_NAMESPACE,
+ need_this,
+ (struct symtab **) NULL);
+ /* Call lookup_symtab, not lookup_partial_symtab, in case there are
+ no psymtabs (coff, xcoff, or some future change to blow away the
+ psymtabs once symbols are read). */
+ if ((sym && SYMBOL_CLASS (sym) == LOC_BLOCK) ||
+ lookup_symtab (tmp))
+ {
+ yylval.ssym.sym = sym;
+ yylval.ssym.is_a_field_of_this = is_a_field_of_this;
+ return BLOCKNAME;
+ }
+ if (sym && SYMBOL_CLASS (sym) == LOC_TYPEDEF)
+ {
+#if 1
+ /* Despite the following flaw, we need to keep this code enabled.
+ Because we can get called from check_stub_method, if we don't
+ handle nested types then it screws many operations in any
+ program which uses nested types. */
+ /* In "A::x", if x is a member function of A and there happens
+ to be a type (nested or not, since the stabs don't make that
+ distinction) named x, then this code incorrectly thinks we
+ are dealing with nested types rather than a member function. */
+
+ char *p;
+ char *namestart;
+ struct symbol *best_sym;
+
+ /* Look ahead to detect nested types. This probably should be
+ done in the grammar, but trying seemed to introduce a lot
+ of shift/reduce and reduce/reduce conflicts. It's possible
+ that it could be done, though. Or perhaps a non-grammar, but
+ less ad hoc, approach would work well. */
+
+ /* Since we do not currently have any way of distinguishing
+ a nested type from a non-nested one (the stabs don't tell
+ us whether a type is nested), we just ignore the
+ containing type. */
+
+ p = lexptr;
+ best_sym = sym;
+ while (1)
+ {
+ /* Skip whitespace. */
+ while (*p == ' ' || *p == '\t' || *p == '\n')
+ ++p;
+ if (*p == ':' && p[1] == ':')
+ {
+ /* Skip the `::'. */
+ p += 2;
+ /* Skip whitespace. */
+ while (*p == ' ' || *p == '\t' || *p == '\n')
+ ++p;
+ namestart = p;
+ while (*p == '_' || *p == '$' || (*p >= '0' && *p <= '9')
+ || (*p >= 'a' && *p <= 'z')
+ || (*p >= 'A' && *p <= 'Z'))
+ ++p;
+ if (p != namestart)
+ {
+ struct symbol *cur_sym;
+ /* As big as the whole rest of the expression, which is
+ at least big enough. */
+ char *ncopy = alloca (strlen (tmp)+strlen (namestart)+3);
+ char *tmp1;
+
+ tmp1 = ncopy;
+ memcpy (tmp1, tmp, strlen (tmp));
+ tmp1 += strlen (tmp);
+ memcpy (tmp1, "::", 2);
+ tmp1 += 2;
+ memcpy (tmp1, namestart, p - namestart);
+ tmp1[p - namestart] = '\0';
+ cur_sym = lookup_symbol (ncopy, expression_context_block,
+ VAR_NAMESPACE, (int *) NULL,
+ (struct symtab **) NULL);
+ if (cur_sym)
+ {
+ if (SYMBOL_CLASS (cur_sym) == LOC_TYPEDEF)
+ {
+ best_sym = cur_sym;
+ lexptr = p;
+ }
+ else
+ break;
+ }
+ else
+ break;
+ }
+ else
+ break;
+ }
+ else
+ break;
+ }
+
+ yylval.tsym.type = SYMBOL_TYPE (best_sym);
+#else /* not 0 */
+ yylval.tsym.type = SYMBOL_TYPE (sym);
+#endif /* not 0 */
+ return TYPENAME;
+ }
+ if ((yylval.tsym.type = lookup_primitive_typename (tmp)) != 0)
+ return TYPENAME;
+
+ if (!sym) /* see if it's an ObjC classname */
+ {
+ CORE_ADDR Class = lookup_objc_class(tmp);
+ if (Class)
+ {
+ extern struct symbol *lookup_struct_typedef();
+ yylval.class.class = Class;
+ if ((sym = lookup_struct_typedef (tmp, expression_context_block, 1)))
+ yylval.class.type = SYMBOL_TYPE (sym);
+ return CLASSNAME;
+ }
+ }
+
+ /* Input names that aren't symbols but ARE valid hex numbers,
+ when the input radix permits them, can be names or numbers
+ depending on the parse. Note we support radixes > 16 here. */
+ if (!sym &&
+ ((tokstart[0] >= 'a' && tokstart[0] < 'a' + input_radix - 10) ||
+ (tokstart[0] >= 'A' && tokstart[0] < 'A' + input_radix - 10)))
+ {
+ YYSTYPE newlval; /* Its value is ignored. */
+ hextype = parse_number (tokstart, namelen, 0, &newlval);
+ if (hextype == INT)
+ {
+ yylval.ssym.sym = sym;
+ yylval.ssym.is_a_field_of_this = is_a_field_of_this;
+ return NAME_OR_INT;
+ }
+ }
+
+ /* Any other kind of symbol */
+ yylval.ssym.sym = sym;
+ yylval.ssym.is_a_field_of_this = is_a_field_of_this;
+ return NAME;
+ }
+}
+
+void
+yyerror (msg)
+ char *msg;
+{
+ if (*lexptr == '\0')
+ error("A %s near end of expression.", (msg ? msg : "error"));
+ else
+ error ("A %s in expression, near `%s'.", (msg ? msg : "error"), lexptr);
+}
--- /dev/null
+/* Objective C language support routines for GDB, the GNU debugger.
+ Copyright 1996 NeXT Software, Inc.
+
+This file is part of GDB.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#include "defs.h"
+#include "symtab.h"
+#include "gdbtypes.h"
+#include "expression.h"
+#include "parser-defs.h"
+#include "language.h"
+#include "objc-lang.h"
+#include "complaints.h"
+#include "value.h"
+#include "symfile.h"
+#include "objfiles.h"
+#include "string.h" /* for strchr */
+#include "target.h" /* for target_has_execution */
+#include "gdbcore.h"
+#include "gdbcmd.h"
+#include "frame.h"
+#include "gdb_regex.h"
+#include "regcache.h"
+
+#include <ctype.h>
+
+struct objc_object {
+ CORE_ADDR isa;
+};
+
+struct objc_class {
+ CORE_ADDR isa;
+ CORE_ADDR super_class;
+ CORE_ADDR name;
+ long version;
+ long info;
+ long instance_size;
+ CORE_ADDR ivars;
+ CORE_ADDR methods;
+ CORE_ADDR cache;
+ CORE_ADDR protocols;
+};
+
+struct objc_super {
+ CORE_ADDR receiver;
+ CORE_ADDR class;
+};
+
+struct objc_method {
+ CORE_ADDR name;
+ CORE_ADDR types;
+ CORE_ADDR imp;
+};
+
+/* Complaints about ObjC classes, selectors, etc. */
+
+static struct complaint noclass_lookup_complaint =
+ {"no way to lookup Objective-C classes", 0, 0};
+
+static struct complaint nosel_lookup_complaint =
+ {"no way to lookup Objective-C selectors", 0, 0};
+
+
+#if (!defined __GNUC__ || __GNUC__ < 2 || __GNUC_MINOR__ < (defined __cplusplus ? 6 : 4))
+#define __CHECK_FUNCTION ((__const char *) 0)
+#else
+#define __CHECK_FUNCTION __PRETTY_FUNCTION__
+#endif
+
+#define CHECK(expression) \
+ ((void) ((expression) ? 0 : gdb_check (#expression, __FILE__, __LINE__, \
+ __CHECK_FUNCTION)))
+
+#define CHECK_FATAL(expression) \
+ ((void) ((expression) ? 0 : gdb_check_fatal (#expression, __FILE__, \
+ __LINE__, __CHECK_FUNCTION)))
+
+void
+gdb_check (const char *str, const char *file, unsigned int line,
+ const char *func)
+{
+ error ("assertion failure on line %u of \"%s\" in function \"%s\": %s\n",
+ line, file, func, str);
+}
+
+void
+gdb_check_fatal (const char *str, const char *file, unsigned int line,
+ const char *func)
+{
+ internal_error (file, line,
+ "assertion failure in function \"%s\": %s\n", func, str);
+}
+
+/* Lookup a structure type named "struct NAME",
+ visible in lexical block BLOCK.
+ If NOERR is nonzero, return zero if NAME is not suitably defined. */
+
+struct symbol *
+lookup_struct_typedef (char *name, struct block *block, int noerr)
+{
+ register struct symbol *sym;
+
+ sym = lookup_symbol (name, block, STRUCT_NAMESPACE, 0, (struct symtab **) NULL);
+
+ if (sym == NULL)
+ {
+ if (noerr)
+ return 0;
+ else
+ error ("No struct type named %s.", name);
+ }
+ if (TYPE_CODE (SYMBOL_TYPE (sym)) != TYPE_CODE_STRUCT)
+ {
+ if (noerr)
+ return 0;
+ else
+ error ("This context has class, union or enum %s, not a struct.", name);
+ }
+ return sym;
+}
+
+CORE_ADDR
+lookup_objc_class (char *classname)
+{
+ struct value * function, *classval;
+
+ if (! target_has_execution)
+ {
+ /* can't call into inferior to lookup class */
+ return 0;
+ }
+
+ if (lookup_minimal_symbol("objc_lookUpClass", 0, 0))
+ function = find_function_in_inferior("objc_lookUpClass");
+ else if (lookup_minimal_symbol ("objc_lookup_class", 0, 0))
+ function = find_function_in_inferior("objc_lookup_class");
+ else
+ {
+ complain (&noclass_lookup_complaint, 0);
+ return 0;
+ }
+
+ classval = value_string (classname, strlen (classname) + 1);
+ classval = value_coerce_array (classval);
+ return (CORE_ADDR) value_as_long (call_function_by_hand (function,
+ 1, &classval));
+}
+
+int
+lookup_child_selector (char *selname)
+{
+ struct value * function, *selstring;
+
+ if (! target_has_execution)
+ {
+ /* can't call into inferior to lookup selector */
+ return 0;
+ }
+
+ if (lookup_minimal_symbol("sel_getUid", 0, 0))
+ function = find_function_in_inferior("sel_getUid");
+ else if (lookup_minimal_symbol ("sel_get_any_uid", 0, 0))
+ function = find_function_in_inferior("sel_get_any_uid");
+ else
+ {
+ complain (&nosel_lookup_complaint, 0);
+ return 0;
+ }
+
+ selstring = value_coerce_array (value_string (selname, strlen (selname) + 1));
+ return value_as_long (call_function_by_hand (function, 1, &selstring));
+}
+
+struct value *
+value_nsstring (char *ptr, int len)
+{
+ struct value *stringValue[3];
+ struct value *function, *nsstringValue;
+ struct symbol *sym;
+ struct type *type;
+
+ if (!target_has_execution)
+ return 0; /* can't call into inferior to create NSString */
+
+ if (!(sym = lookup_struct_typedef("NSString", 0, 1)) &&
+ !(sym = lookup_struct_typedef("NXString", 0, 1)))
+ type = lookup_pointer_type(builtin_type_void);
+ else
+ type = lookup_pointer_type(SYMBOL_TYPE (sym));
+
+ stringValue[2] = value_string(ptr, len);
+ stringValue[2] = value_coerce_array(stringValue[2]);
+ /* _NSNewStringFromCString replaces "istr" after Lantern2A */
+ if (lookup_minimal_symbol("_NSNewStringFromCString", 0, 0))
+ {
+ function = find_function_in_inferior("_NSNewStringFromCString");
+ nsstringValue = call_function_by_hand(function, 1, &stringValue[2]);
+ }
+ else if (lookup_minimal_symbol("istr", 0, 0))
+ {
+ function = find_function_in_inferior("istr");
+ nsstringValue = call_function_by_hand(function, 1, &stringValue[2]);
+ }
+ else if (lookup_minimal_symbol("+[NSString stringWithCString:]", 0, 0))
+ {
+ function = find_function_in_inferior("+[NSString stringWithCString:]");
+ stringValue[0] = value_from_longest
+ (builtin_type_long, lookup_objc_class ("NSString"));
+ stringValue[1] = value_from_longest
+ (builtin_type_long, lookup_child_selector ("stringWithCString:"));
+ nsstringValue = call_function_by_hand(function, 3, &stringValue[0]);
+ }
+ else
+ error ("NSString: internal error -- no way to create new NSString");
+
+ VALUE_TYPE(nsstringValue) = type;
+ return nsstringValue;
+}
+
+/* Objective C name demangling */
+
+char *
+objc_demangle (const char *mangled)
+{
+ char *demangled, *cp;
+
+ if (mangled[0] == '_' &&
+ (mangled[1] == 'i' || mangled[1] == 'c') &&
+ mangled[2] == '_')
+ {
+ cp = demangled = xmalloc(strlen(mangled) + 2);
+
+ if (mangled[1] == 'i')
+ *cp++ = '-'; /* for instance method */
+ else
+ *cp++ = '+'; /* for class method */
+
+ *cp++ = '['; /* opening left brace */
+ strcpy(cp, mangled+3); /* tack on the rest of the mangled name */
+
+ while (*cp && *cp == '_')
+ cp++; /* skip any initial underbars in class name */
+
+ if (!(cp = strchr(cp, '_'))) /* find first non-initial underbar */
+ {
+ free(demangled); /* not mangled name */
+ return NULL;
+ }
+ if (cp[1] == '_') { /* easy case: no category name */
+ *cp++ = ' '; /* replace two '_' with one ' ' */
+ strcpy(cp, mangled + (cp - demangled) + 2);
+ }
+ else {
+ *cp++ = '('; /* less easy case: category name */
+ if (!(cp = strchr(cp, '_')))
+ {
+ free(demangled); /* not mangled name */
+ return NULL;
+ }
+ *cp++ = ')';
+ *cp++ = ' '; /* overwriting 1st char of method name... */
+ strcpy(cp, mangled + (cp - demangled)); /* get it back */
+ }
+
+ while (*cp && *cp == '_')
+ cp++; /* skip any initial underbars in method name */
+
+ for (; *cp; cp++)
+ if (*cp == '_')
+ *cp = ':'; /* replace remaining '_' with ':' */
+
+ *cp++ = ']'; /* closing right brace */
+ *cp++ = 0; /* string terminator */
+ return demangled;
+ }
+ else
+ return NULL; /* not an objc mangled name */
+}
+
+/* Print the character C on STREAM as part of the contents of a literal
+ string whose delimiter is QUOTER. Note that that format for printing
+ characters and strings is language specific. */
+
+static void
+objc_emit_char (register int c, struct ui_file *stream, int quoter)
+{
+
+ c &= 0xFF; /* Avoid sign bit follies */
+
+ if (PRINT_LITERAL_FORM (c))
+ {
+ if (c == '\\' || c == quoter)
+ {
+ fputs_filtered ("\\", stream);
+ }
+ fprintf_filtered (stream, "%c", c);
+ }
+ else
+ {
+ switch (c)
+ {
+ case '\n':
+ fputs_filtered ("\\n", stream);
+ break;
+ case '\b':
+ fputs_filtered ("\\b", stream);
+ break;
+ case '\t':
+ fputs_filtered ("\\t", stream);
+ break;
+ case '\f':
+ fputs_filtered ("\\f", stream);
+ break;
+ case '\r':
+ fputs_filtered ("\\r", stream);
+ break;
+ case '\033':
+ fputs_filtered ("\\e", stream);
+ break;
+ case '\007':
+ fputs_filtered ("\\a", stream);
+ break;
+ default:
+ fprintf_filtered (stream, "\\%.3o", (unsigned int) c);
+ break;
+ }
+ }
+}
+
+static void
+objc_printchar (int c, struct ui_file *stream)
+{
+ fputs_filtered ("'", stream);
+ objc_emit_char (c, stream, '\'');
+ fputs_filtered ("'", stream);
+}
+
+/* Print the character string STRING, printing at most LENGTH characters.
+ Printing stops early if the number hits print_max; repeat counts
+ are printed as appropriate. Print ellipses at the end if we
+ had to stop before printing LENGTH characters, or if FORCE_ELLIPSES. */
+
+static void
+objc_printstr (struct ui_file *stream, char *string, unsigned int length,
+ int force_ellipses)
+{
+ register unsigned int i;
+ unsigned int things_printed = 0;
+ int in_quotes = 0;
+ int need_comma = 0;
+ extern int inspect_it;
+ extern int repeat_count_threshold;
+ extern int print_max;
+
+ /* If the string was not truncated due to `set print elements', and
+ the last byte of it is a null, we don't print that, in traditional C
+ style. */
+ if ((!force_ellipses) && length > 0 && string[length-1] == '\0')
+ length--;
+
+ if (length == 0)
+ {
+ fputs_filtered ("\"\"", stream);
+ return;
+ }
+
+ for (i = 0; i < length && things_printed < print_max; ++i)
+ {
+ /* Position of the character we are examining
+ to see whether it is repeated. */
+ unsigned int rep1;
+ /* Number of repetitions we have detected so far. */
+ unsigned int reps;
+
+ QUIT;
+
+ if (need_comma)
+ {
+ fputs_filtered (", ", stream);
+ need_comma = 0;
+ }
+
+ rep1 = i + 1;
+ reps = 1;
+ while (rep1 < length && string[rep1] == string[i])
+ {
+ ++rep1;
+ ++reps;
+ }
+
+ if (reps > repeat_count_threshold)
+ {
+ if (in_quotes)
+ {
+ if (inspect_it)
+ fputs_filtered ("\\\", ", stream);
+ else
+ fputs_filtered ("\", ", stream);
+ in_quotes = 0;
+ }
+ objc_printchar (string[i], stream);
+ fprintf_filtered (stream, " <repeats %u times>", reps);
+ i = rep1 - 1;
+ things_printed += repeat_count_threshold;
+ need_comma = 1;
+ }
+ else
+ {
+ if (!in_quotes)
+ {
+ if (inspect_it)
+ fputs_filtered ("\\\"", stream);
+ else
+ fputs_filtered ("\"", stream);
+ in_quotes = 1;
+ }
+ objc_emit_char (string[i], stream, '"');
+ ++things_printed;
+ }
+ }
+
+ /* Terminate the quotes if necessary. */
+ if (in_quotes)
+ {
+ if (inspect_it)
+ fputs_filtered ("\\\"", stream);
+ else
+ fputs_filtered ("\"", stream);
+ }
+
+ if (force_ellipses || i < length)
+ fputs_filtered ("...", stream);
+}
+
+/* Create a fundamental C type using default reasonable for the current
+ target machine.
+
+ Some object/debugging file formats (DWARF version 1, COFF, etc) do not
+ define fundamental types such as "int" or "double". Others (stabs or
+ DWARF version 2, etc) do define fundamental types. For the formats which
+ don't provide fundamental types, gdb can create such types using this
+ function.
+
+ FIXME: Some compilers distinguish explicitly signed integral types
+ (signed short, signed int, signed long) from "regular" integral types
+ (short, int, long) in the debugging information. There is some dis-
+ agreement as to how useful this feature is. In particular, gcc does
+ not support this. Also, only some debugging formats allow the
+ distinction to be passed on to a debugger. For now, we always just
+ use "short", "int", or "long" as the type name, for both the implicit
+ and explicitly signed types. This also makes life easier for the
+ gdb test suite since we don't have to account for the differences
+ in output depending upon what the compiler and debugging format
+ support. We will probably have to re-examine the issue when gdb
+ starts taking it's fundamental type information directly from the
+ debugging information supplied by the compiler. fnf@cygnus.com */
+
+static struct type *
+objc_create_fundamental_type (struct objfile *objfile, int typeid)
+{
+ register struct type *type = NULL;
+
+ switch (typeid)
+ {
+ default:
+ /* FIXME: For now, if we are asked to produce a type not in this
+ language, create the equivalent of a C integer type with the
+ name "<?type?>". When all the dust settles from the type
+ reconstruction work, this should probably become an error. */
+ type = init_type (TYPE_CODE_INT,
+ TARGET_INT_BIT / TARGET_CHAR_BIT,
+ 0, "<?type?>", objfile);
+ warning ("internal error: no C/C++ fundamental type %d", typeid);
+ break;
+ case FT_VOID:
+ type = init_type (TYPE_CODE_VOID,
+ TARGET_CHAR_BIT / TARGET_CHAR_BIT,
+ 0, "void", objfile);
+ break;
+ case FT_CHAR:
+ type = init_type (TYPE_CODE_INT,
+ TARGET_CHAR_BIT / TARGET_CHAR_BIT,
+ 0, "char", objfile);
+ break;
+ case FT_SIGNED_CHAR:
+ type = init_type (TYPE_CODE_INT,
+ TARGET_CHAR_BIT / TARGET_CHAR_BIT,
+ 0, "signed char", objfile);
+ break;
+ case FT_UNSIGNED_CHAR:
+ type = init_type (TYPE_CODE_INT,
+ TARGET_CHAR_BIT / TARGET_CHAR_BIT,
+ TYPE_FLAG_UNSIGNED, "unsigned char", objfile);
+ break;
+ case FT_SHORT:
+ type = init_type (TYPE_CODE_INT,
+ TARGET_SHORT_BIT / TARGET_CHAR_BIT,
+ 0, "short", objfile);
+ break;
+ case FT_SIGNED_SHORT:
+ type = init_type (TYPE_CODE_INT,
+ TARGET_SHORT_BIT / TARGET_CHAR_BIT,
+ 0, "short", objfile); /* FIXME-fnf */
+ break;
+ case FT_UNSIGNED_SHORT:
+ type = init_type (TYPE_CODE_INT,
+ TARGET_SHORT_BIT / TARGET_CHAR_BIT,
+ TYPE_FLAG_UNSIGNED, "unsigned short", objfile);
+ break;
+ case FT_INTEGER:
+ type = init_type (TYPE_CODE_INT,
+ TARGET_INT_BIT / TARGET_CHAR_BIT,
+ 0, "int", objfile);
+ break;
+ case FT_SIGNED_INTEGER:
+ type = init_type (TYPE_CODE_INT,
+ TARGET_INT_BIT / TARGET_CHAR_BIT,
+ 0, "int", objfile); /* FIXME -fnf */
+ break;
+ case FT_UNSIGNED_INTEGER:
+ type = init_type (TYPE_CODE_INT,
+ TARGET_INT_BIT / TARGET_CHAR_BIT,
+ TYPE_FLAG_UNSIGNED, "unsigned int", objfile);
+ break;
+ case FT_LONG:
+ type = init_type (TYPE_CODE_INT,
+ TARGET_LONG_BIT / TARGET_CHAR_BIT,
+ 0, "long", objfile);
+ break;
+ case FT_SIGNED_LONG:
+ type = init_type (TYPE_CODE_INT,
+ TARGET_LONG_BIT / TARGET_CHAR_BIT,
+ 0, "long", objfile); /* FIXME -fnf */
+ break;
+ case FT_UNSIGNED_LONG:
+ type = init_type (TYPE_CODE_INT,
+ TARGET_LONG_BIT / TARGET_CHAR_BIT,
+ TYPE_FLAG_UNSIGNED, "unsigned long", objfile);
+ break;
+ case FT_LONG_LONG:
+ type = init_type (TYPE_CODE_INT,
+ TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
+ 0, "long long", objfile);
+ break;
+ case FT_SIGNED_LONG_LONG:
+ type = init_type (TYPE_CODE_INT,
+ TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
+ 0, "signed long long", objfile);
+ break;
+ case FT_UNSIGNED_LONG_LONG:
+ type = init_type (TYPE_CODE_INT,
+ TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
+ TYPE_FLAG_UNSIGNED, "unsigned long long", objfile);
+ break;
+ case FT_FLOAT:
+ type = init_type (TYPE_CODE_FLT,
+ TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
+ 0, "float", objfile);
+ break;
+ case FT_DBL_PREC_FLOAT:
+ type = init_type (TYPE_CODE_FLT,
+ TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
+ 0, "double", objfile);
+ break;
+ case FT_EXT_PREC_FLOAT:
+ type = init_type (TYPE_CODE_FLT,
+ TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
+ 0, "long double", objfile);
+ break;
+ }
+ return (type);
+}
+
+
+/* Table mapping opcodes into strings for printing operators
+ and precedences of the operators. */
+
+static const struct op_print objc_op_print_tab[] =
+ {
+ {",", BINOP_COMMA, PREC_COMMA, 0},
+ {"=", BINOP_ASSIGN, PREC_ASSIGN, 1},
+ {"||", BINOP_LOGICAL_OR, PREC_LOGICAL_OR, 0},
+ {"&&", BINOP_LOGICAL_AND, PREC_LOGICAL_AND, 0},
+ {"|", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
+ {"^", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
+ {"&", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0},
+ {"==", BINOP_EQUAL, PREC_EQUAL, 0},
+ {"!=", BINOP_NOTEQUAL, PREC_EQUAL, 0},
+ {"<=", BINOP_LEQ, PREC_ORDER, 0},
+ {">=", BINOP_GEQ, PREC_ORDER, 0},
+ {">", BINOP_GTR, PREC_ORDER, 0},
+ {"<", BINOP_LESS, PREC_ORDER, 0},
+ {">>", BINOP_RSH, PREC_SHIFT, 0},
+ {"<<", BINOP_LSH, PREC_SHIFT, 0},
+ {"+", BINOP_ADD, PREC_ADD, 0},
+ {"-", BINOP_SUB, PREC_ADD, 0},
+ {"*", BINOP_MUL, PREC_MUL, 0},
+ {"/", BINOP_DIV, PREC_MUL, 0},
+ {"%", BINOP_REM, PREC_MUL, 0},
+ {"@", BINOP_REPEAT, PREC_REPEAT, 0},
+ {"-", UNOP_NEG, PREC_PREFIX, 0},
+ {"!", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
+ {"~", UNOP_COMPLEMENT, PREC_PREFIX, 0},
+ {"*", UNOP_IND, PREC_PREFIX, 0},
+ {"&", UNOP_ADDR, PREC_PREFIX, 0},
+ {"sizeof ", UNOP_SIZEOF, PREC_PREFIX, 0},
+ {"++", UNOP_PREINCREMENT, PREC_PREFIX, 0},
+ {"--", UNOP_PREDECREMENT, PREC_PREFIX, 0},
+ {NULL, 0, 0, 0}
+};
+
+struct type ** const (objc_builtin_types[]) =
+{
+ &builtin_type_int,
+ &builtin_type_long,
+ &builtin_type_short,
+ &builtin_type_char,
+ &builtin_type_float,
+ &builtin_type_double,
+ &builtin_type_void,
+ &builtin_type_long_long,
+ &builtin_type_signed_char,
+ &builtin_type_unsigned_char,
+ &builtin_type_unsigned_short,
+ &builtin_type_unsigned_int,
+ &builtin_type_unsigned_long,
+ &builtin_type_unsigned_long_long,
+ &builtin_type_long_double,
+ &builtin_type_complex,
+ &builtin_type_double_complex,
+ 0
+};
+
+const struct language_defn objc_language_defn = {
+ "objective-c", /* Language name */
+ language_objc,
+ objc_builtin_types,
+ range_check_off,
+ type_check_off,
+ case_sensitive_on,
+ objc_parse,
+ objc_error,
+ evaluate_subexp_standard,
+ objc_printchar, /* Print a character constant */
+ objc_printstr, /* Function to print string constant */
+ objc_emit_char,
+ objc_create_fundamental_type, /* Create fundamental type in this language */
+ c_print_type, /* Print a type using appropriate syntax */
+ c_val_print, /* Print a value using appropriate syntax */
+ c_value_print, /* Print a top-level value */
+ {"", "", "", ""}, /* Binary format info */
+ {"0%lo", "0", "o", ""}, /* Octal format info */
+ {"%ld", "", "d", ""}, /* Decimal format info */
+ {"0x%lx", "0x", "x", ""}, /* Hex format info */
+ objc_op_print_tab, /* expression operators for printing */
+ 1, /* c-style arrays */
+ 0, /* String lower bound */
+ &builtin_type_char, /* Type of string elements */
+ LANG_MAGIC
+};
+
+/*
+ * ObjC:
+ * Following functions help construct Objective C message calls
+ */
+
+struct selname /* for parsing Objective C */
+ {
+ struct selname *next;
+ char *msglist_sel;
+ int msglist_len;
+ };
+
+static int msglist_len;
+static struct selname *selname_chain;
+static char *msglist_sel;
+
+void
+start_msglist(void)
+{
+ register struct selname *new =
+ (struct selname *) xmalloc (sizeof (struct selname));
+
+ new->next = selname_chain;
+ new->msglist_len = msglist_len;
+ new->msglist_sel = msglist_sel;
+ msglist_len = 0;
+ msglist_sel = (char *)xmalloc(1);
+ *msglist_sel = 0;
+ selname_chain = new;
+}
+
+void
+add_msglist(struct stoken *str, int addcolon)
+{
+ char *s, *p;
+ int len, plen;
+
+ if (str == 0) { /* unnamed arg, or... */
+ if (addcolon == 0) { /* variable number of args */
+ msglist_len++;
+ return;
+ }
+ p = "";
+ plen = 0;
+ } else {
+ p = str->ptr;
+ plen = str->length;
+ }
+ len = plen + strlen(msglist_sel) + 2;
+ s = (char *)xmalloc(len);
+ strcpy(s, msglist_sel);
+ strncat(s, p, plen);
+ free(msglist_sel);
+ msglist_sel = s;
+ if (addcolon) {
+ s[len-2] = ':';
+ s[len-1] = 0;
+ msglist_len++;
+ } else
+ s[len-2] = '\0';
+}
+
+int
+end_msglist(void)
+{
+ register int val = msglist_len;
+ register struct selname *sel = selname_chain;
+ register char *p = msglist_sel;
+ int selid;
+
+ selname_chain = sel->next;
+ msglist_len = sel->msglist_len;
+ msglist_sel = sel->msglist_sel;
+ selid = lookup_child_selector(p);
+ if (!selid)
+ error("Can't find selector \"%s\"", p);
+ write_exp_elt_longcst (selid);
+ free(p);
+ write_exp_elt_longcst (val);/* Number of args */
+ free(sel);
+
+ return val;
+}
+
+/*
+ * Function: specialcmp (char *a, char *b)
+ *
+ * Special strcmp: treats ']' and ' ' as end-of-string.
+ * Used for qsorting lists of objc methods (either by class or selector)
+ */
+
+int specialcmp(char *a, char *b)
+{
+ while (*a && *a != ' ' && *a != ']' && *b && *b != ' ' && *b != ']')
+ {
+ if (*a != *b)
+ return *a - *b;
+ a++, b++;
+ }
+ if (*a && *a != ' ' && *a != ']')
+ return 1; /* a is longer therefore greater */
+ if (*b && *b != ' ' && *b != ']')
+ return -1; /* a is shorter therefore lesser */
+ return 0; /* a and b are identical */
+}
+
+/*
+ * Function: compare_selectors (void *, void *)
+ *
+ * Comparison function for use with qsort. Arguments are symbols or msymbols
+ * Compares selector part of objc method name alphabetically.
+ */
+
+static int
+compare_selectors (a, b)
+ void *a;
+ void *b;
+{
+ char *aname, *bname;
+
+ if ((aname = SYMBOL_SOURCE_NAME (*(struct symbol **) a)) == NULL ||
+ (bname = SYMBOL_SOURCE_NAME (*(struct symbol **) b)) == NULL)
+ error ("internal: compare_selectors(1)");
+
+ if ((aname = strchr(aname, ' ')) == NULL ||
+ (bname = strchr(bname, ' ')) == NULL)
+ error ("internal: compare_selectors(2)");
+
+ return specialcmp (aname+1, bname+1);
+}
+
+/*
+ * Function: selectors_info (regexp, from_tty)
+ *
+ * Implements the "Info selectors" command. Takes an optional regexp arg.
+ * Lists all objective c selectors that match the regexp. Works by
+ * grepping thru all symbols for objective c methods. Output list is
+ * sorted and uniqued.
+ */
+
+static void
+selectors_info (char *regexp, int from_tty)
+{
+ struct objfile *objfile;
+ struct minimal_symbol *msymbol;
+ char *name;
+ char *val;
+ int matches = 0;
+ int maxlen = 0;
+ int ix;
+ char myregexp[2048];
+ char asel[256];
+ struct symbol **sym_arr;
+ int plusminus = 0;
+
+ if (regexp == NULL)
+ strcpy(myregexp, ".*]"); /* null input, match all objc methods */
+ else
+ {
+ if (*regexp == '+' || *regexp == '-') /* if regexp starts with +/- */
+ { /* user wants only class methods or only instance methods */
+ plusminus = *regexp++;
+ while (*regexp == ' ' || *regexp == '\t')
+ regexp++;
+ }
+ if (*regexp == '\0')
+ strcpy(myregexp, ".*]");
+ else
+ {
+ strcpy(myregexp, regexp);
+ if (myregexp[strlen(myregexp) - 1] == '$') /* end of selector */
+ myregexp[strlen(myregexp) - 1] = ']'; /* end of method name */
+ else
+ strcat(myregexp, ".*]");
+ }
+ }
+
+ if (regexp != NULL)
+ if (0 != (val = re_comp (myregexp)))
+ error ("Invalid regexp (%s): %s", val, regexp);
+
+ /* first time thru is JUST to get max length and count */
+ ALL_MSYMBOLS (objfile, msymbol)
+ {
+ QUIT;
+ if ((name = SYMBOL_DEMANGLED_NAME (msymbol)) == NULL)
+ name = SYMBOL_NAME (msymbol);
+ if (name &&
+ (name[0] == '-' || name[0] == '+') &&
+ name[1] == '[') /* got a method name */
+ {
+ if (plusminus && name[0] != plusminus)
+ continue; /* filter for class/instance methods */
+ name = (char *) strchr(name+2, ' '); /* find selector part */
+ if (regexp == NULL || re_exec(++name) != 0)
+ {
+ char *mystart = name;
+ char *myend = (char *) strchr(mystart, ']');
+
+ if (myend && (myend - mystart > maxlen))
+ maxlen = myend - mystart; /* get longest selector */
+ matches++;
+ }
+ }
+ }
+ if (matches)
+ {
+ printf_filtered ("Selectors matching \"%s\":\n\n",
+ regexp ? regexp : "*");
+
+ sym_arr = alloca (matches * sizeof (struct symbol *));
+ matches = 0;
+ ALL_MSYMBOLS (objfile, msymbol)
+ {
+ QUIT;
+ if ((name = SYMBOL_DEMANGLED_NAME (msymbol)) == NULL)
+ name = SYMBOL_NAME (msymbol);
+ if (name &&
+ (name[0] == '-' || name[0] == '+') &&
+ name[1] == '[') /* got a method name */
+ {
+ if (plusminus && name[0] != plusminus)
+ continue; /* filter for class/instance methods */
+ name = (char *) strchr(name+2, ' '); /* find selector part */
+ if (regexp == NULL || re_exec(++name) != 0)
+ sym_arr[matches++] = (struct symbol *) msymbol;
+ }
+ }
+
+ qsort (sym_arr, matches, sizeof (struct minimal_symbol *),
+ compare_selectors);
+ asel[0] = 0; /* to prevent compare on first iteration */
+ for (ix = 0; ix < matches; ix++) /* now do the output */
+ {
+ char *p = asel;
+
+ QUIT;
+ if ((name = SYMBOL_DEMANGLED_NAME (sym_arr[ix])) == NULL)
+ name = SYMBOL_NAME (sym_arr[ix]);
+ name = strchr (name, ' ') + 1;
+ if (p[0] && specialcmp(name, p) == 0)
+ continue; /* seen this one already (not unique) */
+
+ while (*name && *name != ']') /* copy selector part */
+ *p++ = *name++;
+ *p++ = '\0';
+ puts_filtered_tabular(asel, maxlen + 1, 0); /* print in columns */
+ }
+ begin_line();
+ }
+ else
+ printf_filtered ("No selectors matching \"%s\"\n", regexp ? regexp : "*");
+}
+
+/*
+ * Function: compare_classes (void *, void *)
+ *
+ * Comparison function for use with qsort. Arguments are symbols or msymbols
+ * Compares class part of objc method name alphabetically.
+ */
+
+static int
+compare_classes (a, b)
+ void *a;
+ void *b;
+{
+ char *aname, *bname;
+
+ if ((aname = SYMBOL_SOURCE_NAME (*(struct symbol **) a)) == NULL ||
+ (bname = SYMBOL_SOURCE_NAME (*(struct symbol **) b)) == NULL)
+ error ("internal: compare_classes(1)");
+
+ return specialcmp (aname+1, bname+1);
+}
+
+/*
+ * Function: classes_info(regexp, from_tty)
+ *
+ * Implements the "info classes" command for objective c classes.
+ * Lists all objective c classes that match the optional regexp.
+ * Works by grepping thru the list of objective c methods.
+ * List will be sorted and uniqued (since one class may have many methods).
+ * BUGS: will not list a class that has no methods.
+ */
+
+static void
+classes_info (char *regexp, int from_tty)
+{
+ struct objfile *objfile;
+ struct minimal_symbol *msymbol;
+ char *name;
+ char *val;
+ int matches = 0;
+ int maxlen = 0;
+ int ix;
+ char myregexp[2048];
+ char aclass[256];
+ struct symbol **sym_arr;
+
+ if (regexp == NULL)
+ strcpy(myregexp, ".* "); /* null input: match all objc classes */
+ else
+ {
+ strcpy(myregexp, regexp);
+ if (myregexp[strlen(myregexp) - 1] == '$')
+ /* in the method name, the end of the class name is marked by ' ' */
+ myregexp[strlen(myregexp) - 1] = ' ';
+ else
+ strcat(myregexp, ".* ");
+ }
+
+ if (regexp != NULL)
+ if (0 != (val = re_comp (myregexp)))
+ error ("Invalid regexp (%s): %s", val, regexp);
+
+ /* first time thru is JUST to get max length and count */
+ ALL_MSYMBOLS (objfile, msymbol)
+ {
+ QUIT;
+ if ((name = SYMBOL_DEMANGLED_NAME (msymbol)) == NULL)
+ name = SYMBOL_NAME (msymbol);
+ if (name &&
+ (name[0] == '-' || name[0] == '+') &&
+ name[1] == '[') /* got a method name */
+ if (regexp == NULL || re_exec(name+2) != 0)
+ {
+ char *mystart = name + 2; /* compute length of classname part */
+ char *myend = (char *) strchr(mystart, ' ');
+
+ if (myend && (myend - mystart > maxlen))
+ maxlen = myend - mystart;
+ matches++;
+ }
+ }
+ if (matches)
+ {
+ printf_filtered ("Classes matching \"%s\":\n\n",
+ regexp ? regexp : "*");
+ sym_arr = alloca (matches * sizeof (struct symbol *));
+ matches = 0;
+ ALL_MSYMBOLS (objfile, msymbol)
+ {
+ QUIT;
+ if ((name = SYMBOL_DEMANGLED_NAME (msymbol)) == NULL)
+ name = SYMBOL_NAME (msymbol);
+ if (name &&
+ (name[0] == '-' || name[0] == '+') &&
+ name[1] == '[') /* got a method name */
+ if (regexp == NULL || re_exec(name+2) != 0)
+ sym_arr[matches++] = (struct symbol *) msymbol;
+ }
+
+ qsort (sym_arr, matches, sizeof (struct minimal_symbol *),
+ compare_classes);
+ aclass[0] = 0; /* to prevent compare on first iteration */
+ for (ix = 0; ix < matches; ix++) /* now do the output */
+ {
+ char *p = aclass;
+
+ QUIT;
+ if ((name = SYMBOL_DEMANGLED_NAME (sym_arr[ix])) == NULL)
+ name = SYMBOL_NAME (sym_arr[ix]);
+ name += 2;
+ if (p[0] && specialcmp(name, p) == 0)
+ continue; /* seen this one already (not unique) */
+
+ while (*name && *name != ' ') /* copy class part of method name */
+ *p++ = *name++;
+ *p++ = '\0';
+ puts_filtered_tabular(aclass, maxlen + 1, 0); /* print in columns */
+ }
+ begin_line();
+ }
+ else
+ printf_filtered ("No classes matching \"%s\"\n", regexp ? regexp : "*");
+}
+
+/*
+ * Function: find_imps (char *selector, struct symbol **sym_arr)
+ *
+ * Input: a string representing a selector
+ * a pointer to an array of symbol pointers
+ * possibly a pointer to a symbol found by the caller.
+ *
+ * Output: number of methods that implement that selector.
+ * Side effects: The array of symbol pointers is filled with matching syms.
+ *
+ * By analogy with function "find_methods" (symtab.c), builds a list of
+ * symbols matching the ambiguous input, so that "decode_line_2" (symtab.c)
+ * can list them and ask the user to choose one or more. In this case the
+ * matches are objective c methods ("implementations") matching an objective
+ * c selector.
+ *
+ * Note that it is possible for a normal (c-style) function to have the
+ * same name as an objective c selector. To prevent the selector from
+ * eclipsing the function, we allow the caller (decode_line_1) to search
+ * for such a function first, and if it finds one, pass it in to us. We
+ * will then integrate it into the list. We also search for one here,
+ * among the minsyms.
+ *
+ * NOTE: if NUM_DEBUGGABLE is non-zero, the sym_arr will be
+ * divided into two parts: debuggable (struct symbol) syms,
+ * and non_debuggable (struct minimal_symbol) syms.
+ * The debuggable ones will come first, before NUM_DEBUGGABLE
+ * (which will thus be the index of the first non-debuggable one).
+ */
+
+/*
+ * Function: total_number_of_imps (char *selector);
+ *
+ * Input: a string representing a selector
+ * Output: number of methods that implement that selector.
+ *
+ * By analogy with function "total_number_of_methods", this allows
+ * decode_line_1 (symtab.c) to detect if there are objective c methods
+ * matching the input, and to allocate an array of pointers to them
+ * which can be manipulated by "decode_line_2" (also in symtab.c)
+ */
+
+char *
+parse_selector (char *method, char **selector)
+{
+ char *s1 = NULL;
+ char *s2 = NULL;
+ int found_quote = 0;
+
+ char *nselector = NULL;
+
+ CHECK (selector != NULL);
+
+ s1 = method;
+
+ while (isspace (*s1))
+ s1++;
+ if (*s1 == '\'')
+ {
+ found_quote = 1;
+ s1++;
+ }
+ while (isspace (*s1))
+ s1++;
+
+ nselector = s1;
+ s2 = s1;
+
+ for (;;) {
+ if (isalnum (*s2) || (*s2 == '_') || (*s2 == ':'))
+ *s1++ = *s2;
+ else if (isspace (*s2))
+ ;
+ else if ((*s2 == '\0') || (*s2 == '\''))
+ break;
+ else
+ return NULL;
+ s2++;
+ }
+ *s1++ = '\0';
+
+ while (isspace (*s2))
+ s2++;
+ if (found_quote)
+ {
+ if (*s2 == '\'')
+ s2++;
+ while (isspace (*s2))
+ s2++;
+ }
+
+ if (selector != NULL)
+ *selector = nselector;
+
+ return s2;
+}
+
+char *
+parse_method (char *method, char *type, char **class, char **category,
+ char **selector)
+{
+ char *s1 = NULL;
+ char *s2 = NULL;
+ int found_quote = 0;
+
+ char ntype = '\0';
+ char *nclass = NULL;
+ char *ncategory = NULL;
+ char *nselector = NULL;
+
+ CHECK (type != NULL);
+ CHECK (class != NULL);
+ CHECK (category != NULL);
+ CHECK (selector != NULL);
+
+ s1 = method;
+
+ while (isspace (*s1))
+ s1++;
+ if (*s1 == '\'')
+ {
+ found_quote = 1;
+ s1++;
+ }
+ while (isspace (*s1))
+ s1++;
+
+ if ((s1[0] == '+') || (s1[0] == '-'))
+ ntype = *s1++;
+
+ while (isspace (*s1))
+ s1++;
+
+ if (*s1 != '[')
+ return NULL;
+ s1++;
+
+ nclass = s1;
+ while (isalnum (*s1) || (*s1 == '_'))
+ s1++;
+
+ s2 = s1;
+ while (isspace (*s2))
+ s2++;
+
+ if (*s2 == '(')
+ {
+ s2++;
+ while (isspace (*s2))
+ s2++;
+ ncategory = s2;
+ while (isalnum (*s2) || (*s2 == '_'))
+ s2++;
+ *s2++ = '\0';
+ }
+
+ /* truncate the class name now that we're not using the open paren */
+ *s1++ = '\0';
+
+ nselector = s2;
+ s1 = s2;
+
+ for (;;) {
+ if (isalnum (*s2) || (*s2 == '_') || (*s2 == ':'))
+ *s1++ = *s2;
+ else if (isspace (*s2))
+ ;
+ else if (*s2 == ']')
+ break;
+ else
+ return NULL;
+ s2++;
+ }
+ *s1++ = '\0';
+ s2++;
+
+ while (isspace (*s2))
+ s2++;
+ if (found_quote)
+ {
+ if (*s2 != '\'')
+ return NULL;
+ s2++;
+ while (isspace (*s2))
+ s2++;
+ }
+
+ if (type != NULL)
+ *type = ntype;
+ if (class != NULL)
+ *class = nclass;
+ if (category != NULL)
+ *category = ncategory;
+ if (selector != NULL)
+ *selector = nselector;
+
+ return s2;
+}
+
+void
+find_methods (struct symtab *symtab,
+ char type, const char *class, const char *category,
+ const char *selector,
+ struct symbol **syms, unsigned int *nsym, unsigned int *ndebug)
+{
+ struct objfile *objfile = NULL;
+ struct minimal_symbol *msymbol = NULL;
+ struct block *block = NULL;
+ struct symbol *sym = NULL;
+
+ char *symname = NULL;
+
+ char ntype = '\0';
+ char *nclass = NULL;
+ char *ncategory = NULL;
+ char *nselector = NULL;
+
+ unsigned int csym = 0;
+ unsigned int cdebug = 0;
+
+ static char *tmp = NULL;
+ static unsigned int tmplen = 0;
+
+ CHECK (nsym != NULL);
+ CHECK (ndebug != NULL);
+
+ if (symtab)
+ block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (symtab), STATIC_BLOCK);
+
+ ALL_MSYMBOLS (objfile, msymbol)
+ {
+ QUIT;
+
+ if ((msymbol->type != mst_text) && (msymbol->type != mst_file_text))
+ /* not a function or method */
+ continue;
+
+ if (symtab)
+ if ((SYMBOL_VALUE_ADDRESS (msymbol) < block->startaddr) ||
+ (SYMBOL_VALUE_ADDRESS (msymbol) >= block->endaddr))
+ /* not in the specified symtab */
+ continue;
+
+ symname = SYMBOL_DEMANGLED_NAME (msymbol);
+ if (symname == NULL)
+ symname = SYMBOL_NAME (msymbol);
+ if (symname == NULL)
+ continue;
+
+ if ((symname[0] != '-' && symname[0] != '+') || (symname[1] != '['))
+ /* not a method name */
+ continue;
+
+ while ((strlen (symname) + 1) >= tmplen)
+ {
+ tmplen = (tmplen == 0) ? 1024 : tmplen * 2;
+ tmp = xrealloc (tmp, tmplen);
+ }
+ strcpy (tmp, symname);
+
+ if (parse_method (tmp, &ntype, &nclass, &ncategory, &nselector) == NULL)
+ continue;
+
+ if ((type != '\0') && (ntype != type))
+ continue;
+
+ if ((class != NULL) && ((nclass == NULL) || (strcmp (class, nclass) != 0)))
+ continue;
+
+ if ((category != NULL) && ((ncategory == NULL) || (strcmp (category, ncategory) != 0)))
+ continue;
+
+ if ((selector != NULL) && ((nselector == NULL) || (strcmp (selector, nselector) != 0)))
+ continue;
+
+ sym = find_pc_function (SYMBOL_VALUE_ADDRESS (msymbol));
+ if (sym != NULL)
+ {
+ const char *newsymname = SYMBOL_DEMANGLED_NAME (sym);
+
+ if (newsymname == NULL)
+ newsymname = SYMBOL_NAME (sym);
+ if (strcmp (symname, newsymname) == 0)
+ {
+ /* found a high-level method sym: swap it into the
+ lower part of sym_arr (below num_debuggable) */
+ if (syms != NULL)
+ {
+ syms[csym] = syms[cdebug];
+ syms[cdebug] = sym;
+ }
+ csym++;
+ cdebug++;
+ }
+ else
+ {
+ warning ("debugging symbol \"%s\" does not match minimal symbol (\"%s\"); ignoring",
+ newsymname, symname);
+ if (syms != NULL)
+ syms[csym] = (struct symbol *) msymbol;
+ csym++;
+ }
+ }
+ else
+ {
+ /* found a non-debuggable method symbol */
+ if (syms != NULL)
+ syms[csym] = (struct symbol *) msymbol;
+ csym++;
+ }
+ }
+
+ if (nsym != NULL)
+ *nsym = csym;
+ if (ndebug != NULL)
+ *ndebug = cdebug;
+}
+
+char *find_imps (struct symtab *symtab, struct block *block,
+ char *method, struct symbol **syms, unsigned int *nsym,
+ unsigned int *ndebug)
+{
+ char type = '\0';
+ char *class = NULL;
+ char *category = NULL;
+ char *selector = NULL;
+
+ unsigned int csym = 0;
+ unsigned int cdebug = 0;
+
+ unsigned int ncsym = 0;
+ unsigned int ncdebug = 0;
+
+ char *buf = NULL;
+ char *tmp = NULL;
+
+ CHECK (nsym != NULL);
+ CHECK (ndebug != NULL);
+
+ if (nsym != NULL)
+ *nsym = 0;
+ if (ndebug != NULL)
+ *ndebug = 0;
+
+ buf = (char *) alloca (strlen (method) + 1);
+ strcpy (buf, method);
+ tmp = parse_method (buf, &type, &class, &category, &selector);
+
+ if (tmp == NULL) {
+
+ struct symtab *sym_symtab = NULL;
+ struct symbol *sym = NULL;
+ struct minimal_symbol *msym = NULL;
+
+ strcpy (buf, method);
+ tmp = parse_selector (buf, &selector);
+
+ if (tmp == NULL)
+ return NULL;
+
+ sym = lookup_symbol (selector, block, VAR_NAMESPACE, 0, &sym_symtab);
+ if (sym != NULL)
+ {
+ if (syms)
+ syms[csym] = sym;
+ csym++;
+ cdebug++;
+ }
+
+ if (sym == NULL)
+ msym = lookup_minimal_symbol (selector, 0, 0);
+
+ if (msym != NULL)
+ {
+ if (syms)
+ syms[csym] = msym;
+ csym++;
+ }
+ }
+
+ if (syms != NULL)
+ find_methods (symtab, type, class, category, selector, syms + csym, &ncsym, &ncdebug);
+ else
+ find_methods (symtab, type, class, category, selector, NULL, &ncsym, &ncdebug);
+
+ /* If we didn't find any methods, just return. */
+ if (ncsym == 0 && ncdebug == 0)
+ return method;
+
+ /* Take debug symbols from the second batch of symbols and swap them
+ * with debug symbols from the first batch. Repeat until either the
+ * second section is out of debug symbols or the first section is
+ * full of debug symbols. Either way we have all debug symbols
+ * packed to the beginning of the buffer. */
+
+ if (syms != NULL)
+ {
+ while ((cdebug < csym) && (ncdebug > 0))
+ {
+ struct symbol *s = NULL;
+
+ unsigned int i = cdebug; /* first non-debugging symbol */
+ unsigned int j = csym + ncdebug -1; /* last of second batch of debug symbols */
+
+ s = syms[j];
+ syms[j] = syms[i];
+ syms[i] = s;
+
+ /* We've moved a symbol from the second debug section to the first one. */
+ cdebug++;
+ ncdebug--;
+ }
+ }
+
+ csym += ncsym;
+ cdebug += ncdebug;
+
+ if (nsym != NULL)
+ *nsym = csym;
+ if (ndebug != NULL)
+ *ndebug = cdebug;
+
+ if (syms == NULL)
+ return method + (tmp - buf);
+
+ if (csym > 1)
+ {
+ /* sort debuggable symbols */
+ if (cdebug > 1)
+ qsort (syms, cdebug, sizeof (struct minimal_symbol *), compare_classes);
+
+ /* sort minimal_symbols */
+ if ((csym - cdebug) > 1)
+ qsort (&syms[cdebug], csym - cdebug, sizeof (struct minimal_symbol *), compare_classes);
+ }
+ syms[csym] = 0; /* terminate the sym_arr list */
+
+ return method + (tmp - buf);
+}
+
+void
+print_object_command (char *args, int from_tty)
+{
+ struct value *object, *function, *description;
+ CORE_ADDR string_addr;
+ int i = 0;
+ char c = -1;
+
+ if (!args || !*args)
+ error ("The 'print-object' command requires an argument (an Objective-C object)");
+
+ {
+ struct expression *expr = parse_expression (args);
+ register struct cleanup *old_chain = make_cleanup (free_current_contents, &expr);
+ int pc = 0;
+
+#if 1
+ object = expr->language_defn->evaluate_exp (builtin_type_void_data_ptr,
+ expr, &pc, EVAL_NORMAL);
+#else
+ object = evaluate_subexp (builtin_type_void_data_ptr, expr, &pc, EVAL_NORMAL);
+#endif
+ do_cleanups (old_chain);
+ }
+
+ if (!(function = find_function_in_inferior ("_NSPrintForDebugger")))
+ error ("Unable to locate _NSPrintForDebugger in child process");
+
+ description = call_function_by_hand (function, 1, &object);
+
+ if ((string_addr = value_as_long (description)) == 0)
+ error ("object returns null description");
+
+ read_memory (string_addr + i++, &c, 1);
+ if (c != '\0')
+ do
+ { /* read and print characters up to EOS */
+ QUIT;
+ printf_filtered ("%c", c);
+ read_memory (string_addr + i++, &c, 1);
+ } while (c != 0);
+ else
+ printf_filtered("<object returns empty description>");
+ printf_filtered ("\n");
+}
+
+/* The data structure 'methcalls' is used to detect method calls
+ * (thru ObjC runtime lib functions objc_msgSend, objc_msgSendSuper, etc.),
+ * and ultimately find the method being called.
+ */
+
+struct objc_methcall {
+ char *name;
+ CORE_ADDR (*stop_at) (CORE_ADDR); /* should return instance method to be called */
+ CORE_ADDR begin; /* start of pc range corresponding to method invocation */
+ CORE_ADDR end; /* end of pc range corresponding to method invocation */
+};
+
+static int resolve_msgsend PARAMS ((CORE_ADDR pc, CORE_ADDR *new_pc));
+static int resolve_msgsend_stret PARAMS ((CORE_ADDR pc, CORE_ADDR *new_pc));
+static int resolve_msgsend_super PARAMS ((CORE_ADDR pc, CORE_ADDR *new_pc));
+static int resolve_msgsend_super_stret PARAMS ((CORE_ADDR pc, CORE_ADDR *new_pc));
+
+static struct objc_methcall methcalls[] = {
+ { "_objc_msgSend", resolve_msgsend, 0, 0},
+ { "_objc_msgSend_stret", resolve_msgsend_stret, 0, 0},
+ { "_objc_msgSendSuper", resolve_msgsend_super, 0, 0},
+ { "_objc_msgSendSuper_stret", resolve_msgsend_super_stret, 0, 0},
+ { "_objc_getClass", NULL, 0, 0},
+ { "_objc_getMetaClass", NULL, 0, 0}
+};
+
+#define nmethcalls (sizeof (methcalls) / sizeof (methcalls[0]))
+
+/* The following function, "find_objc_msgsend", fills in the data structure
+ * "objc_msgs" by finding the addresses of each of the (currently four)
+ * functions that it holds (of which objc_msgSend is the first). This
+ * must be called each time symbols are loaded, in case the functions
+ * have moved for some reason.
+ */
+
+void
+find_objc_msgsend (void)
+{
+ unsigned int i;
+ for (i = 0; i < nmethcalls; i++) {
+
+ struct minimal_symbol *func;
+
+ /* try both with and without underscore */
+ func = lookup_minimal_symbol (methcalls[i].name, NULL, NULL);
+ if ((func == NULL) && (methcalls[i].name[0] == '_')) {
+ func = lookup_minimal_symbol (methcalls[i].name + 1, NULL, NULL);
+ }
+ if (func == NULL) {
+ methcalls[i].begin = 0;
+ methcalls[i].end = 0;
+ continue;
+ }
+
+ methcalls[i].begin = SYMBOL_VALUE_ADDRESS (func);
+ do {
+ methcalls[i].end = SYMBOL_VALUE_ADDRESS (++func);
+ } while (methcalls[i].begin == methcalls[i].end);
+ }
+}
+
+/* find_objc_msgcall (replaces pc_off_limits)
+ *
+ * ALL that this function now does is to determine whether the input
+ * address ("pc") is the address of one of the Objective C message
+ * dispatch functions (mainly objc_msgSend or objc_msgSendSuper), and
+ * if so, it returns the address of the method that will be called.
+ *
+ * The old function "pc_off_limits" used to do a lot of other things
+ * in addition, such as detecting shared library jump stubs and
+ * returning the address of the shlib function that would be called.
+ * That functionality has been moved into the SKIP_TRAMPOLINE_CODE
+ * and IN_SOLIB_TRAMPOLINE macros, which are resolved in the target-
+ * dependent modules.
+ */
+
+struct objc_submethod_helper_data {
+ CORE_ADDR (*f) (CORE_ADDR, CORE_ADDR *);
+ CORE_ADDR pc;
+ CORE_ADDR *new_pc;
+};
+
+int
+find_objc_msgcall_submethod_helper (PTR arg)
+{
+ struct objc_submethod_helper_data *s = (struct objc_submethod_helper_data *) arg;
+ if (s->f (s->pc, s->new_pc) == 0) {
+ return 1;
+ } else {
+ return 0;
+ }
+}
+
+int
+find_objc_msgcall_submethod (f, pc, new_pc)
+ CORE_ADDR (*f) (CORE_ADDR, CORE_ADDR *);
+ CORE_ADDR pc;
+ CORE_ADDR *new_pc;
+{
+ struct objc_submethod_helper_data s;
+
+ s.f = f;
+ s.pc = pc;
+ s.new_pc = new_pc;
+
+ if (catch_errors (find_objc_msgcall_submethod_helper,
+ (PTR) &s,
+ "Unable to determine target of Objective-C method call (ignoring):\n",
+ RETURN_MASK_ALL) == 0) {
+ return 1;
+ } else {
+ return 0;
+ }
+}
+
+int
+find_objc_msgcall (CORE_ADDR pc, CORE_ADDR *new_pc)
+{
+ unsigned int i;
+
+ find_objc_msgsend ();
+ if (new_pc != NULL) { *new_pc = 0; }
+
+ for (i = 0; i < nmethcalls; i++) {
+ if ((pc >= methcalls[i].begin) && (pc < methcalls[i].end)) {
+ if (methcalls[i].stop_at != NULL) {
+ return find_objc_msgcall_submethod (methcalls[i].stop_at, pc, new_pc);
+ } else {
+ return 0;
+ }
+ }
+ }
+ return 0;
+}
+
+void
+_initialize_objc_language (void)
+{
+ add_language (&objc_language_defn);
+ add_info ("selectors", selectors_info, /* INFO SELECTORS command */
+ "All Objective C selectors, or those matching REGEXP.");
+ add_info ("classes", classes_info, /* INFO CLASSES command */
+ "All Objective C classes, or those matching REGEXP.");
+ add_com ("print-object", class_vars, print_object_command,
+ "Ask an Objective-C object to print itself.\n");
+ add_com_alias ("po", "print-object", class_vars, 1);
+}
+
+#if defined (__powerpc__) || defined (__ppc__)
+static unsigned long FETCH_ARGUMENT (int i)
+{
+ return read_register (3 + i);
+}
+#elif defined (__i386__)
+static unsigned long FETCH_ARGUMENT (int i)
+{
+ CORE_ADDR stack = read_register (SP_REGNUM);
+ return read_memory_unsigned_integer (stack + (4 * (i + 1)), 4);
+}
+#elif defined (__sparc__)
+static unsigned long FETCH_ARGUMENT (int i)
+{
+ return read_register (O0_REGNUM + i);
+}
+#elif defined (__hppa__) || defined (__hppa)
+static unsigned long FETCH_ARGUMENT (int i)
+{
+ return read_register (R0_REGNUM + 26 - i);
+}
+#else
+#error unknown architecture
+#endif
+
+#if defined (__hppa__) || defined (__hppa)
+static CORE_ADDR CONVERT_FUNCPTR (CORE_ADDR pc)
+{
+ if (pc & 0x2) {
+ pc = (CORE_ADDR) read_memory_integer (pc & ~0x3, 4);
+ }
+ return pc;
+}
+#else
+static CORE_ADDR CONVERT_FUNCPTR (CORE_ADDR pc)
+{
+ return pc;
+}
+#endif
+
+static void
+read_objc_method (CORE_ADDR addr, struct objc_method *method)
+{
+ method->name = read_memory_unsigned_integer (addr, 4);
+ method->types = read_memory_unsigned_integer (addr + 4, 4);
+ method->imp = read_memory_unsigned_integer (addr + 8, 4);
+}
+
+static
+unsigned long read_objc_methlist_nmethods (CORE_ADDR addr)
+{
+ return read_memory_unsigned_integer (addr + 4, 4);
+}
+
+static void
+read_objc_methlist_method (CORE_ADDR addr, unsigned long num,
+ struct objc_method *method)
+{
+ CHECK_FATAL (num < read_objc_methlist_nmethods (addr));
+ read_objc_method (addr + 8 + (12 * num), method);
+}
+
+static void
+read_objc_object (CORE_ADDR addr, struct objc_object *object)
+{
+ object->isa = read_memory_unsigned_integer (addr, 4);
+}
+
+static void
+read_objc_super (CORE_ADDR addr, struct objc_super *super)
+{
+ super->receiver = read_memory_unsigned_integer (addr, 4);
+ super->class = read_memory_unsigned_integer (addr + 4, 4);
+};
+
+static void
+read_objc_class (CORE_ADDR addr, struct objc_class *class)
+{
+ class->isa = read_memory_unsigned_integer (addr, 4);
+ class->super_class = read_memory_unsigned_integer (addr + 4, 4);
+ class->name = read_memory_unsigned_integer (addr + 8, 4);
+ class->version = read_memory_unsigned_integer (addr + 12, 4);
+ class->info = read_memory_unsigned_integer (addr + 16, 4);
+ class->instance_size = read_memory_unsigned_integer (addr + 18, 4);
+ class->ivars = read_memory_unsigned_integer (addr + 24, 4);
+ class->methods = read_memory_unsigned_integer (addr + 28, 4);
+ class->cache = read_memory_unsigned_integer (addr + 32, 4);
+ class->protocols = read_memory_unsigned_integer (addr + 36, 4);
+}
+
+CORE_ADDR
+find_implementation_from_class (CORE_ADDR class, CORE_ADDR sel)
+{
+ CORE_ADDR subclass = class;
+
+ while (subclass != 0) {
+
+ struct objc_class class_str;
+ unsigned mlistnum = 0;
+
+ read_objc_class (subclass, &class_str);
+
+ for (;;) {
+ CORE_ADDR mlist;
+ unsigned long nmethods;
+ unsigned long i;
+
+ mlist = read_memory_unsigned_integer (class_str.methods + (4 * mlistnum), 4);
+ if (mlist == 0) { break; }
+
+ nmethods = read_objc_methlist_nmethods (mlist);
+
+ for (i = 0; i < nmethods; i++) {
+ struct objc_method meth_str;
+ read_objc_methlist_method (mlist, i, &meth_str);
+
+#if 0
+ fprintf (stderr, "checking method 0x%lx against selector 0x%lx\n", meth_str.name, sel);
+#endif
+
+ if (meth_str.name == sel) {
+ return CONVERT_FUNCPTR (meth_str.imp);
+ }
+ }
+
+ mlistnum++;
+ }
+
+ subclass = class_str.super_class;
+ }
+
+ return 0;
+}
+
+CORE_ADDR
+find_implementation (CORE_ADDR object, CORE_ADDR sel)
+{
+ struct objc_object ostr;
+
+ if (object == 0) { return 0; }
+ read_objc_object (object, &ostr);
+ if (ostr.isa == 0) { return 0; }
+
+ return find_implementation_from_class (ostr.isa, sel);
+}
+
+static int
+resolve_msgsend (CORE_ADDR pc, CORE_ADDR *new_pc)
+{
+ CORE_ADDR object;
+ CORE_ADDR sel;
+ CORE_ADDR res;
+
+ object = FETCH_ARGUMENT (0);
+ sel = FETCH_ARGUMENT (1);
+
+ res = find_implementation (object, sel);
+ if (new_pc != 0) { *new_pc = res; }
+ if (res == 0) { return 1; }
+ return 0;
+}
+
+static int
+resolve_msgsend_stret (CORE_ADDR pc, CORE_ADDR *new_pc)
+{
+ CORE_ADDR object;
+ CORE_ADDR sel;
+ CORE_ADDR res;
+
+ object = FETCH_ARGUMENT (1);
+ sel = FETCH_ARGUMENT (2);
+
+ res = find_implementation (object, sel);
+ if (new_pc != 0) { *new_pc = res; }
+ if (res == 0) { return 1; }
+ return 0;
+}
+
+static int
+resolve_msgsend_super (CORE_ADDR pc, CORE_ADDR *new_pc)
+{
+ struct objc_super sstr;
+
+ CORE_ADDR super;
+ CORE_ADDR sel;
+ CORE_ADDR res;
+
+ super = FETCH_ARGUMENT (0);
+ sel = FETCH_ARGUMENT (1);
+
+ read_objc_super (super, &sstr);
+ if (sstr.class == 0) { return 0; }
+
+ res = find_implementation_from_class (sstr.class, sel);
+ if (new_pc != 0) { *new_pc = res; }
+ if (res == 0) { return 1; }
+ return 0;
+}
+
+static int
+resolve_msgsend_super_stret (CORE_ADDR pc, CORE_ADDR *new_pc)
+{
+ struct objc_super sstr;
+
+ CORE_ADDR super;
+ CORE_ADDR sel;
+ CORE_ADDR res;
+
+ super = FETCH_ARGUMENT (1);
+ sel = FETCH_ARGUMENT (2);
+
+ read_objc_super (super, &sstr);
+ if (sstr.class == 0) { return 0; }
+
+ res = find_implementation_from_class (sstr.class, sel);
+ if (new_pc != 0) { *new_pc = res; }
+ if (res == 0) { return 1; }
+ return 0;
+}
projects / binutils-gdb.git / commitdiff