ae6a3a4c2a
* language.h (language_dfn): Add la_get_string member. (LA_GET_STRING): New macro. (default_get_string): New prototype. * language.c (default_get_string): New function. (unknown_language_defn, auto_language_defn, local_language_defn): Use default_get_string for la_get_string. * c-lang.c (c_get_string): New function. (c_language_defn, cplus_language_defn, asm_language_defn): Use c_get_string for la_get_string. (minimal_language_defn): Likewise * ada-lang.c (ada_language_defn): Likewise. * f-lang.c (f_language_defn): Use default_get_string for la_get_string. * jv-lang.c (java_language_defn): Likewise. * m2-lang.c (m2_language_defn): Likewise. * objc-lang.c (objc_language_defn): Likewise. * p-lang.c (p_language_defn): Likewise. * scm-lang.c (scm_language_defn): Likewise. * typeprint.c (type_to_string): New function. * value.h (type_to_string): New prototype. * valprint.c (val_print_string): Factor out code for reading string from the inferior into its own function. Put 2 spaces after period in comments. (read_string): New function. * valprint.h (read_string): New prototype.
508 lines
17 KiB
C
508 lines
17 KiB
C
/* Source-language-related definitions for GDB.
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Copyright (C) 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2000, 2003, 2004,
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2007, 2008, 2009 Free Software Foundation, Inc.
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Contributed by the Department of Computer Science at the State University
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of New York at Buffalo.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#if !defined (LANGUAGE_H)
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#define LANGUAGE_H 1
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/* Forward decls for prototypes */
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struct value;
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struct objfile;
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struct frame_info;
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struct expression;
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struct ui_file;
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struct value_print_options;
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#define MAX_FORTRAN_DIMS 7 /* Maximum number of F77 array dims */
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/* range_mode ==
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range_mode_auto: range_check set automatically to default of language.
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range_mode_manual: range_check set manually by user. */
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extern enum range_mode
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{
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range_mode_auto, range_mode_manual
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}
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range_mode;
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/* range_check ==
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range_check_on: Ranges are checked in GDB expressions, producing errors.
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range_check_warn: Ranges are checked, producing warnings.
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range_check_off: Ranges are not checked in GDB expressions. */
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extern enum range_check
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{
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range_check_off, range_check_warn, range_check_on
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}
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range_check;
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/* type_mode ==
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type_mode_auto: type_check set automatically to default of language
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type_mode_manual: type_check set manually by user. */
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extern enum type_mode
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{
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type_mode_auto, type_mode_manual
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}
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type_mode;
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/* type_check ==
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type_check_on: Types are checked in GDB expressions, producing errors.
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type_check_warn: Types are checked, producing warnings.
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type_check_off: Types are not checked in GDB expressions. */
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extern enum type_check
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{
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type_check_off, type_check_warn, type_check_on
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}
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type_check;
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/* case_mode ==
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case_mode_auto: case_sensitivity set upon selection of scope
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case_mode_manual: case_sensitivity set only by user. */
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extern enum case_mode
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{
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case_mode_auto, case_mode_manual
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}
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case_mode;
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/* array_ordering ==
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array_row_major: Arrays are in row major order
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array_column_major: Arrays are in column major order.*/
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extern enum array_ordering
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{
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array_row_major, array_column_major
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}
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array_ordering;
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/* case_sensitivity ==
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case_sensitive_on: Case sensitivity in name matching is used
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case_sensitive_off: Case sensitivity in name matching is not used */
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extern enum case_sensitivity
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{
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case_sensitive_on, case_sensitive_off
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}
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case_sensitivity;
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/* macro_expansion ==
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macro_expansion_no: No macro expansion is available
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macro_expansion_c: C-like macro expansion is available */
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enum macro_expansion
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{
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macro_expansion_no, macro_expansion_c
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};
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/* Per architecture (OS/ABI) language information. */
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struct language_arch_info
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{
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/* Its primitive types. This is a vector ended by a NULL pointer.
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These types can be specified by name in parsing types in
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expressions, regardless of whether the program being debugged
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actually defines such a type. */
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struct type **primitive_type_vector;
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/* Type of elements of strings. */
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struct type *string_char_type;
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/* Symbol name of type to use as boolean type, if defined. */
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const char *bool_type_symbol;
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/* Otherwise, this is the default boolean builtin type. */
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struct type *bool_type_default;
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};
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/* Structure tying together assorted information about a language. */
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struct language_defn
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{
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/* Name of the language */
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char *la_name;
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/* its symtab language-enum (defs.h) */
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enum language la_language;
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/* Default range checking */
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enum range_check la_range_check;
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/* Default type checking */
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enum type_check la_type_check;
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/* Default case sensitivity */
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enum case_sensitivity la_case_sensitivity;
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/* Multi-dimensional array ordering */
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enum array_ordering la_array_ordering;
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/* Style of macro expansion, if any, supported by this language. */
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enum macro_expansion la_macro_expansion;
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/* Definitions related to expression printing, prefixifying, and
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dumping */
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const struct exp_descriptor *la_exp_desc;
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/* Parser function. */
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int (*la_parser) (void);
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/* Parser error function */
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void (*la_error) (char *);
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/* Given an expression *EXPP created by prefixifying the result of
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la_parser, perform any remaining processing necessary to complete
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its translation. *EXPP may change; la_post_parser is responsible
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for releasing its previous contents, if necessary. If
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VOID_CONTEXT_P, then no value is expected from the expression. */
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void (*la_post_parser) (struct expression ** expp, int void_context_p);
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void (*la_printchar) (int ch, struct ui_file * stream);
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void (*la_printstr) (struct ui_file * stream, const gdb_byte *string,
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unsigned int length, int width,
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int force_ellipses,
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const struct value_print_options *);
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void (*la_emitchar) (int ch, struct ui_file * stream, int quoter);
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/* Print a type using syntax appropriate for this language. */
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void (*la_print_type) (struct type *, char *, struct ui_file *, int,
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int);
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/* Print a typedef using syntax appropriate for this language.
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TYPE is the underlying type. NEW_SYMBOL is the symbol naming
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the type. STREAM is the output stream on which to print. */
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void (*la_print_typedef) (struct type *type, struct symbol *new_symbol,
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struct ui_file *stream);
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/* Print a value using syntax appropriate for this language. */
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int (*la_val_print) (struct type *, const gdb_byte *, int, CORE_ADDR,
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struct ui_file *, int,
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const struct value_print_options *);
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/* Print a top-level value using syntax appropriate for this language. */
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int (*la_value_print) (struct value *, struct ui_file *,
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const struct value_print_options *);
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/* PC is possibly an unknown languages trampoline.
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If that PC falls in a trampoline belonging to this language,
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return the address of the first pc in the real function, or 0
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if it isn't a language tramp for this language. */
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CORE_ADDR (*skip_trampoline) (struct frame_info *, CORE_ADDR);
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/* Now come some hooks for lookup_symbol. */
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/* If this is non-NULL, specifies the name that of the implicit
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local variable that refers to the current object instance. */
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char *la_name_of_this;
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/* This is a function that lookup_symbol will call when it gets to
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the part of symbol lookup where C looks up static and global
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variables. */
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struct symbol *(*la_lookup_symbol_nonlocal) (const char *,
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const char *,
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const struct block *,
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const domain_enum);
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/* Find the definition of the type with the given name. */
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struct type *(*la_lookup_transparent_type) (const char *);
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/* Return demangled language symbol, or NULL. */
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char *(*la_demangle) (const char *mangled, int options);
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/* Return class name of a mangled method name or NULL. */
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char *(*la_class_name_from_physname) (const char *physname);
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/* Table for printing expressions */
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const struct op_print *la_op_print_tab;
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/* Zero if the language has first-class arrays. True if there are no
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array values, and array objects decay to pointers, as in C. */
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char c_style_arrays;
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/* Index to use for extracting the first element of a string. */
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char string_lower_bound;
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/* The list of characters forming word boundaries. */
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char *(*la_word_break_characters) (void);
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/* Should return a NULL terminated array of all symbols which
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are possible completions for TEXT. WORD is the entire command
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on which the completion is being made. */
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char **(*la_make_symbol_completion_list) (char *text, char *word);
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/* The per-architecture (OS/ABI) language information. */
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void (*la_language_arch_info) (struct gdbarch *,
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struct language_arch_info *);
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/* Print the index of an element of an array. */
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void (*la_print_array_index) (struct value *index_value,
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struct ui_file *stream,
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const struct value_print_options *options);
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/* Return non-zero if TYPE should be passed (and returned) by
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reference at the language level. */
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int (*la_pass_by_reference) (struct type *type);
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/* Obtain a string from the inferior, storing it in a newly allocated
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buffer in BUFFER, which should be freed by the caller. LENGTH will
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hold the size in bytes of the string (only actual characters, excluding
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an eventual terminating null character). CHARSET will hold the encoding
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used in the string. */
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void (*la_get_string) (struct value *value, gdb_byte **buffer, int *length,
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const char **charset);
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/* Add fields above this point, so the magic number is always last. */
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/* Magic number for compat checking */
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long la_magic;
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};
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#define LANG_MAGIC 910823L
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/* Pointer to the language_defn for our current language. This pointer
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always points to *some* valid struct; it can be used without checking
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it for validity.
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The current language affects expression parsing and evaluation
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(FIXME: it might be cleaner to make the evaluation-related stuff
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separate exp_opcodes for each different set of semantics. We
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should at least think this through more clearly with respect to
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what happens if the language is changed between parsing and
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evaluation) and printing of things like types and arrays. It does
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*not* affect symbol-reading-- each source file in a symbol-file has
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its own language and we should keep track of that regardless of the
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language when symbols are read. If we want some manual setting for
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the language of symbol files (e.g. detecting when ".c" files are
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C++), it should be a separate setting from the current_language. */
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extern const struct language_defn *current_language;
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/* Pointer to the language_defn expected by the user, e.g. the language
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of main(), or the language we last mentioned in a message, or C. */
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extern const struct language_defn *expected_language;
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/* language_mode ==
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language_mode_auto: current_language automatically set upon selection
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of scope (e.g. stack frame)
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language_mode_manual: current_language set only by user. */
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extern enum language_mode
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{
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language_mode_auto, language_mode_manual
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}
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language_mode;
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struct type *language_bool_type (const struct language_defn *l,
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struct gdbarch *gdbarch);
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struct type *language_string_char_type (const struct language_defn *l,
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struct gdbarch *gdbarch);
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struct type *language_lookup_primitive_type_by_name (const struct language_defn *l,
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struct gdbarch *gdbarch,
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const char *name);
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/* These macros define the behaviour of the expression
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evaluator. */
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/* Should we strictly type check expressions? */
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#define STRICT_TYPE (type_check != type_check_off)
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/* Should we range check values against the domain of their type? */
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#define RANGE_CHECK (range_check != range_check_off)
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/* "cast" really means conversion */
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/* FIXME -- should be a setting in language_defn */
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#define CAST_IS_CONVERSION (current_language->la_language == language_c || \
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current_language->la_language == language_cplus || \
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current_language->la_language == language_objc)
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extern void language_info (int);
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extern enum language set_language (enum language);
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/* This page contains functions that return things that are
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specific to languages. Each of these functions is based on
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the current setting of working_lang, which the user sets
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with the "set language" command. */
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#define LA_PRINT_TYPE(type,varstring,stream,show,level) \
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(current_language->la_print_type(type,varstring,stream,show,level))
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#define LA_PRINT_TYPEDEF(type,new_symbol,stream) \
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(current_language->la_print_typedef(type,new_symbol,stream))
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#define LA_VAL_PRINT(type,valaddr,offset,addr,stream,recurse,options) \
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(current_language->la_val_print(type,valaddr,offset,addr,stream, \
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recurse,options))
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#define LA_VALUE_PRINT(val,stream,options) \
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(current_language->la_value_print(val,stream,options))
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#define LA_PRINT_CHAR(ch, stream) \
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(current_language->la_printchar(ch, stream))
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#define LA_PRINT_STRING(stream, string, length, width, force_ellipses,options) \
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(current_language->la_printstr(stream, string, length, width, \
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force_ellipses,options))
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#define LA_EMIT_CHAR(ch, stream, quoter) \
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(current_language->la_emitchar(ch, stream, quoter))
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#define LA_GET_STRING(value, buffer, length, encoding) \
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(current_language->la_get_string(value, buffer, length, encoding))
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#define LA_PRINT_ARRAY_INDEX(index_value, stream, optins) \
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(current_language->la_print_array_index(index_value, stream, options))
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/* Test a character to decide whether it can be printed in literal form
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or needs to be printed in another representation. For example,
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in C the literal form of the character with octal value 141 is 'a'
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and the "other representation" is '\141'. The "other representation"
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is program language dependent. */
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#define PRINT_LITERAL_FORM(c) \
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((c) >= 0x20 \
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&& ((c) < 0x7F || (c) >= 0xA0) \
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&& (!sevenbit_strings || (c) < 0x80))
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#if 0
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/* FIXME: cagney/2000-03-04: This function does not appear to be used.
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It can be deleted once 5.0 has been released. */
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/* Return a string that contains the hex digits of the number. No preceeding
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"0x" */
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extern char *longest_raw_hex_string (LONGEST);
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#endif
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/* Type predicates */
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extern int simple_type (struct type *);
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extern int ordered_type (struct type *);
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extern int same_type (struct type *, struct type *);
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extern int integral_type (struct type *);
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extern int numeric_type (struct type *);
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extern int character_type (struct type *);
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extern int boolean_type (struct type *);
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extern int float_type (struct type *);
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extern int pointer_type (struct type *);
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extern int structured_type (struct type *);
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/* Checks Binary and Unary operations for semantic type correctness */
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/* FIXME: Does not appear to be used */
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#define unop_type_check(v,o) binop_type_check((v),NULL,(o))
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extern void binop_type_check (struct value *, struct value *, int);
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/* Error messages */
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extern void type_error (const char *, ...) ATTR_FORMAT (printf, 1, 2);
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extern void range_error (const char *, ...) ATTR_FORMAT (printf, 1, 2);
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/* Data: Does this value represent "truth" to the current language? */
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extern int value_true (struct value *);
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/* Misc: The string representing a particular enum language. */
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extern enum language language_enum (char *str);
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extern const struct language_defn *language_def (enum language);
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extern char *language_str (enum language);
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/* Add a language to the set known by GDB (at initialization time). */
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extern void add_language (const struct language_defn *);
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extern enum language get_frame_language (void); /* In stack.c */
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/* Check for a language-specific trampoline. */
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extern CORE_ADDR skip_language_trampoline (struct frame_info *, CORE_ADDR pc);
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/* Return demangled language symbol, or NULL. */
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extern char *language_demangle (const struct language_defn *current_language,
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const char *mangled, int options);
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/* Return class name from physname, or NULL. */
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extern char *language_class_name_from_physname (const struct language_defn *,
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const char *physname);
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/* Splitting strings into words. */
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extern char *default_word_break_characters (void);
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/* Print the index of an array element using the C99 syntax. */
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extern void default_print_array_index (struct value *index_value,
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struct ui_file *stream,
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const struct value_print_options *options);
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/* Return non-zero if TYPE should be passed (and returned) by
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reference at the language level. */
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int language_pass_by_reference (struct type *type);
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/* Return zero; by default, types are passed by value at the language
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level. The target ABI may pass or return some structs by reference
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independent of this. */
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int default_pass_by_reference (struct type *type);
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/* The default implementation of la_print_typedef. */
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void default_print_typedef (struct type *type, struct symbol *new_symbol,
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struct ui_file *stream);
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void default_get_string (struct value *value, gdb_byte **buffer, int *length,
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const char **charset);
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void c_get_string (struct value *value, gdb_byte **buffer, int *length,
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const char **charset);
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#endif /* defined (LANGUAGE_H) */
|