548 lines
19 KiB
C
548 lines
19 KiB
C
/* Source-language-related definitions for GDB.
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Copyright (C) 1991-1995, 1998-2000, 2003-2004, 2007-2012 Free
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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 type *chtype,
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struct ui_file * stream);
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void (*la_printstr) (struct ui_file * stream, struct type *elttype,
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const gdb_byte *string, unsigned int length,
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const char *encoding, int force_ellipses,
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const struct value_print_options *);
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void (*la_emitchar) (int ch, struct type *chtype,
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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 *, const 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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TYPE is the type of the sub-object to be printed.
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CONTENTS holds the bits of the value. This holds the entire
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enclosing object.
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EMBEDDED_OFFSET is the offset into the outermost object of the
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sub-object represented by TYPE. This is the object which this
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call should print. Note that the enclosing type is not
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available.
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ADDRESS is the address in the inferior of the enclosing object.
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STREAM is the stream on which the value is to be printed.
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RECURSE is the recursion depth. It is zero-based.
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OPTIONS are the formatting options to be used when
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printing. */
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int (*la_val_print) (struct type *type,
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const gdb_byte *contents,
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int embedded_offset, CORE_ADDR address,
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struct ui_file *stream, int recurse,
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const struct value *val,
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const struct value_print_options *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 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. If the
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in- and out-parameter *LENGTH is specified at -1, the string is
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read until a null character of the appropriate width is found -
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otherwise the string is read to the length of characters specified.
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On completion, *LENGTH will hold the size of the string in characters.
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If a *LENGTH of -1 was specified it will count only actual
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characters, excluding any eventual terminating null character.
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Otherwise *LENGTH will include all characters - including any nulls.
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CHARSET will hold the encoding used in the string. */
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void (*la_get_string) (struct value *value, gdb_byte **buffer, int *length,
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struct type **chartype, const char **charset);
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/* Compare two symbol names according to language rules. For
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instance, in C++, we might want to ignore whitespaces in
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the symbol name. Or some case-insensitive language might
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want to ignore casing during the match.
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Both STR1 and STR2 are expected to be demangled name, except
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for Ada, where STR1 and STR2 are expected to be encoded names.
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The latter is because searches are performed using the encoded
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name in Ada.
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The return value follows the same spirit as strcmp. */
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int (*la_symbol_name_compare) (const char *str1, const char *str2);
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/* Find all symbols in the current program space matching NAME in
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DOMAIN, according to this language's rules.
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The search starts with BLOCK. This function iterates upward
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through blocks. When the outermost block has been finished,
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the function returns.
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For each one, call CALLBACK with the symbol and the DATA
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argument. If CALLBACK returns zero, the iteration ends at that
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point.
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This field can be NULL, meaning that this language doesn't need
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any special code aside from ordinary searches of the symbol
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table. */
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void (*la_iterate_over_symbols) (const struct block *block,
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const char *name,
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domain_enum domain,
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int (*callback) (struct symbol *, void *),
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void *data);
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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(LANG) ((LANG)->la_language == language_c || \
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(LANG)->la_language == language_cplus || \
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(LANG)->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,val,recurse,options) \
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(current_language->la_val_print(type,valaddr,offset,addr,stream, \
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val,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, type, stream) \
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(current_language->la_printchar(ch, type, stream))
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#define LA_PRINT_STRING(stream, elttype, string, length, encoding, force_ellipses, options) \
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(current_language->la_printstr(stream, elttype, string, length, \
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encoding, force_ellipses,options))
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#define LA_EMIT_CHAR(ch, type, stream, quoter) \
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(current_language->la_emitchar(ch, type, stream, quoter))
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#define LA_GET_STRING(value, buffer, length, chartype, encoding) \
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(current_language->la_get_string(value, buffer, length, chartype, encoding))
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#define LA_PRINT_ARRAY_INDEX(index_value, stream, options) \
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(current_language->la_print_array_index(index_value, stream, options))
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#define LA_ITERATE_OVER_SYMBOLS(BLOCK, NAME, DOMAIN, CALLBACK, DATA) \
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(current_language->la_iterate_over_symbols (BLOCK, NAME, DOMAIN, CALLBACK, \
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DATA))
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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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/* Type predicates */
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extern int pointer_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 *, ...) ATTRIBUTE_PRINTF (1, 2);
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extern void range_error (const char *, ...) ATTRIBUTE_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,
|
||
const struct value_print_options *options);
|
||
|
||
/* Return non-zero if TYPE should be passed (and returned) by
|
||
reference at the language level. */
|
||
int language_pass_by_reference (struct type *type);
|
||
|
||
/* Return zero; by default, types are passed by value at the language
|
||
level. The target ABI may pass or return some structs by reference
|
||
independent of this. */
|
||
int default_pass_by_reference (struct type *type);
|
||
|
||
/* The default implementation of la_print_typedef. */
|
||
void default_print_typedef (struct type *type, struct symbol *new_symbol,
|
||
struct ui_file *stream);
|
||
|
||
void default_get_string (struct value *value, gdb_byte **buffer, int *length,
|
||
struct type **char_type, const char **charset);
|
||
|
||
void c_get_string (struct value *value, gdb_byte **buffer, int *length,
|
||
struct type **char_type, const char **charset);
|
||
|
||
#endif /* defined (LANGUAGE_H) */
|