mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-25 02:53:48 +08:00
5953832c5a
* language.c (binop_result_type): Delete. (simple_type, ordered_type, same_type, integral_type): Delete. (numeric_type, character_type, string_type, boolean_type): Delete. (float_type, structured_type): Delete. * language.h: Update.
548 lines
19 KiB
C
548 lines
19 KiB
C
/* Source-language-related definitions for GDB.
|
||
|
||
Copyright (C) 1991-1995, 1998-2000, 2003-2004, 2007-2012 Free
|
||
Software Foundation, Inc.
|
||
|
||
Contributed by the Department of Computer Science at the State University
|
||
of New York at Buffalo.
|
||
|
||
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 3 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, see <http://www.gnu.org/licenses/>. */
|
||
|
||
#if !defined (LANGUAGE_H)
|
||
#define LANGUAGE_H 1
|
||
|
||
/* Forward decls for prototypes. */
|
||
struct value;
|
||
struct objfile;
|
||
struct frame_info;
|
||
struct expression;
|
||
struct ui_file;
|
||
struct value_print_options;
|
||
|
||
#define MAX_FORTRAN_DIMS 7 /* Maximum number of F77 array dims. */
|
||
|
||
/* range_mode ==
|
||
range_mode_auto: range_check set automatically to default of language.
|
||
range_mode_manual: range_check set manually by user. */
|
||
|
||
extern enum range_mode
|
||
{
|
||
range_mode_auto, range_mode_manual
|
||
}
|
||
range_mode;
|
||
|
||
/* range_check ==
|
||
range_check_on: Ranges are checked in GDB expressions, producing errors.
|
||
range_check_warn: Ranges are checked, producing warnings.
|
||
range_check_off: Ranges are not checked in GDB expressions. */
|
||
|
||
extern enum range_check
|
||
{
|
||
range_check_off, range_check_warn, range_check_on
|
||
}
|
||
range_check;
|
||
|
||
/* type_mode ==
|
||
type_mode_auto: type_check set automatically to default of language.
|
||
type_mode_manual: type_check set manually by user. */
|
||
|
||
extern enum type_mode
|
||
{
|
||
type_mode_auto, type_mode_manual
|
||
}
|
||
type_mode;
|
||
|
||
/* type_check ==
|
||
type_check_on: Types are checked in GDB expressions, producing errors.
|
||
type_check_warn: Types are checked, producing warnings.
|
||
type_check_off: Types are not checked in GDB expressions. */
|
||
|
||
extern enum type_check
|
||
{
|
||
type_check_off, type_check_warn, type_check_on
|
||
}
|
||
type_check;
|
||
|
||
/* case_mode ==
|
||
case_mode_auto: case_sensitivity set upon selection of scope.
|
||
case_mode_manual: case_sensitivity set only by user. */
|
||
|
||
extern enum case_mode
|
||
{
|
||
case_mode_auto, case_mode_manual
|
||
}
|
||
case_mode;
|
||
|
||
/* array_ordering ==
|
||
array_row_major: Arrays are in row major order.
|
||
array_column_major: Arrays are in column major order. */
|
||
|
||
extern enum array_ordering
|
||
{
|
||
array_row_major, array_column_major
|
||
}
|
||
array_ordering;
|
||
|
||
|
||
/* case_sensitivity ==
|
||
case_sensitive_on: Case sensitivity in name matching is used.
|
||
case_sensitive_off: Case sensitivity in name matching is not used. */
|
||
|
||
extern enum case_sensitivity
|
||
{
|
||
case_sensitive_on, case_sensitive_off
|
||
}
|
||
case_sensitivity;
|
||
|
||
|
||
/* macro_expansion ==
|
||
macro_expansion_no: No macro expansion is available.
|
||
macro_expansion_c: C-like macro expansion is available. */
|
||
|
||
enum macro_expansion
|
||
{
|
||
macro_expansion_no, macro_expansion_c
|
||
};
|
||
|
||
|
||
/* Per architecture (OS/ABI) language information. */
|
||
|
||
struct language_arch_info
|
||
{
|
||
/* Its primitive types. This is a vector ended by a NULL pointer.
|
||
These types can be specified by name in parsing types in
|
||
expressions, regardless of whether the program being debugged
|
||
actually defines such a type. */
|
||
struct type **primitive_type_vector;
|
||
/* Type of elements of strings. */
|
||
struct type *string_char_type;
|
||
|
||
/* Symbol name of type to use as boolean type, if defined. */
|
||
const char *bool_type_symbol;
|
||
/* Otherwise, this is the default boolean builtin type. */
|
||
struct type *bool_type_default;
|
||
};
|
||
|
||
/* Structure tying together assorted information about a language. */
|
||
|
||
struct language_defn
|
||
{
|
||
/* Name of the language. */
|
||
|
||
char *la_name;
|
||
|
||
/* its symtab language-enum (defs.h). */
|
||
|
||
enum language la_language;
|
||
|
||
/* Default range checking. */
|
||
|
||
enum range_check la_range_check;
|
||
|
||
/* Default type checking. */
|
||
|
||
enum type_check la_type_check;
|
||
|
||
/* Default case sensitivity. */
|
||
enum case_sensitivity la_case_sensitivity;
|
||
|
||
/* Multi-dimensional array ordering. */
|
||
enum array_ordering la_array_ordering;
|
||
|
||
/* Style of macro expansion, if any, supported by this language. */
|
||
enum macro_expansion la_macro_expansion;
|
||
|
||
/* Definitions related to expression printing, prefixifying, and
|
||
dumping. */
|
||
|
||
const struct exp_descriptor *la_exp_desc;
|
||
|
||
/* Parser function. */
|
||
|
||
int (*la_parser) (void);
|
||
|
||
/* Parser error function. */
|
||
|
||
void (*la_error) (char *);
|
||
|
||
/* Given an expression *EXPP created by prefixifying the result of
|
||
la_parser, perform any remaining processing necessary to complete
|
||
its translation. *EXPP may change; la_post_parser is responsible
|
||
for releasing its previous contents, if necessary. If
|
||
VOID_CONTEXT_P, then no value is expected from the expression. */
|
||
|
||
void (*la_post_parser) (struct expression ** expp, int void_context_p);
|
||
|
||
void (*la_printchar) (int ch, struct type *chtype,
|
||
struct ui_file * stream);
|
||
|
||
void (*la_printstr) (struct ui_file * stream, struct type *elttype,
|
||
const gdb_byte *string, unsigned int length,
|
||
const char *encoding, int force_ellipses,
|
||
const struct value_print_options *);
|
||
|
||
void (*la_emitchar) (int ch, struct type *chtype,
|
||
struct ui_file * stream, int quoter);
|
||
|
||
/* Print a type using syntax appropriate for this language. */
|
||
|
||
void (*la_print_type) (struct type *, const char *, struct ui_file *, int,
|
||
int);
|
||
|
||
/* Print a typedef using syntax appropriate for this language.
|
||
TYPE is the underlying type. NEW_SYMBOL is the symbol naming
|
||
the type. STREAM is the output stream on which to print. */
|
||
|
||
void (*la_print_typedef) (struct type *type, struct symbol *new_symbol,
|
||
struct ui_file *stream);
|
||
|
||
/* Print a value using syntax appropriate for this language.
|
||
|
||
TYPE is the type of the sub-object to be printed.
|
||
|
||
CONTENTS holds the bits of the value. This holds the entire
|
||
enclosing object.
|
||
|
||
EMBEDDED_OFFSET is the offset into the outermost object of the
|
||
sub-object represented by TYPE. This is the object which this
|
||
call should print. Note that the enclosing type is not
|
||
available.
|
||
|
||
ADDRESS is the address in the inferior of the enclosing object.
|
||
|
||
STREAM is the stream on which the value is to be printed.
|
||
|
||
RECURSE is the recursion depth. It is zero-based.
|
||
|
||
OPTIONS are the formatting options to be used when
|
||
printing. */
|
||
|
||
int (*la_val_print) (struct type *type,
|
||
const gdb_byte *contents,
|
||
int embedded_offset, CORE_ADDR address,
|
||
struct ui_file *stream, int recurse,
|
||
const struct value *val,
|
||
const struct value_print_options *options);
|
||
|
||
/* Print a top-level value using syntax appropriate for this language. */
|
||
|
||
int (*la_value_print) (struct value *, struct ui_file *,
|
||
const struct value_print_options *);
|
||
|
||
/* PC is possibly an unknown languages trampoline.
|
||
If that PC falls in a trampoline belonging to this language,
|
||
return the address of the first pc in the real function, or 0
|
||
if it isn't a language tramp for this language. */
|
||
CORE_ADDR (*skip_trampoline) (struct frame_info *, CORE_ADDR);
|
||
|
||
/* Now come some hooks for lookup_symbol. */
|
||
|
||
/* If this is non-NULL, specifies the name that of the implicit
|
||
local variable that refers to the current object instance. */
|
||
|
||
char *la_name_of_this;
|
||
|
||
/* This is a function that lookup_symbol will call when it gets to
|
||
the part of symbol lookup where C looks up static and global
|
||
variables. */
|
||
|
||
struct symbol *(*la_lookup_symbol_nonlocal) (const char *,
|
||
const struct block *,
|
||
const domain_enum);
|
||
|
||
/* Find the definition of the type with the given name. */
|
||
struct type *(*la_lookup_transparent_type) (const char *);
|
||
|
||
/* Return demangled language symbol, or NULL. */
|
||
char *(*la_demangle) (const char *mangled, int options);
|
||
|
||
/* Return class name of a mangled method name or NULL. */
|
||
char *(*la_class_name_from_physname) (const char *physname);
|
||
|
||
/* Table for printing expressions. */
|
||
|
||
const struct op_print *la_op_print_tab;
|
||
|
||
/* Zero if the language has first-class arrays. True if there are no
|
||
array values, and array objects decay to pointers, as in C. */
|
||
|
||
char c_style_arrays;
|
||
|
||
/* Index to use for extracting the first element of a string. */
|
||
char string_lower_bound;
|
||
|
||
/* The list of characters forming word boundaries. */
|
||
char *(*la_word_break_characters) (void);
|
||
|
||
/* Should return a NULL terminated array of all symbols which
|
||
are possible completions for TEXT. WORD is the entire command
|
||
on which the completion is being made. */
|
||
char **(*la_make_symbol_completion_list) (char *text, char *word);
|
||
|
||
/* The per-architecture (OS/ABI) language information. */
|
||
void (*la_language_arch_info) (struct gdbarch *,
|
||
struct language_arch_info *);
|
||
|
||
/* Print the index of an element of an array. */
|
||
void (*la_print_array_index) (struct value *index_value,
|
||
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 (*la_pass_by_reference) (struct type *type);
|
||
|
||
/* Obtain a string from the inferior, storing it in a newly allocated
|
||
buffer in BUFFER, which should be freed by the caller. If the
|
||
in- and out-parameter *LENGTH is specified at -1, the string is
|
||
read until a null character of the appropriate width is found -
|
||
otherwise the string is read to the length of characters specified.
|
||
On completion, *LENGTH will hold the size of the string in characters.
|
||
If a *LENGTH of -1 was specified it will count only actual
|
||
characters, excluding any eventual terminating null character.
|
||
Otherwise *LENGTH will include all characters - including any nulls.
|
||
CHARSET will hold the encoding used in the string. */
|
||
void (*la_get_string) (struct value *value, gdb_byte **buffer, int *length,
|
||
struct type **chartype, const char **charset);
|
||
|
||
/* Compare two symbol names according to language rules. For
|
||
instance, in C++, we might want to ignore whitespaces in
|
||
the symbol name. Or some case-insensitive language might
|
||
want to ignore casing during the match.
|
||
|
||
Both STR1 and STR2 are expected to be demangled name, except
|
||
for Ada, where STR1 and STR2 are expected to be encoded names.
|
||
The latter is because searches are performed using the encoded
|
||
name in Ada.
|
||
|
||
The return value follows the same spirit as strcmp. */
|
||
|
||
int (*la_symbol_name_compare) (const char *str1, const char *str2);
|
||
|
||
/* Find all symbols in the current program space matching NAME in
|
||
DOMAIN, according to this language's rules.
|
||
|
||
The search starts with BLOCK. This function iterates upward
|
||
through blocks. When the outermost block has been finished,
|
||
the function returns.
|
||
|
||
For each one, call CALLBACK with the symbol and the DATA
|
||
argument. If CALLBACK returns zero, the iteration ends at that
|
||
point.
|
||
|
||
This field can be NULL, meaning that this language doesn't need
|
||
any special code aside from ordinary searches of the symbol
|
||
table. */
|
||
void (*la_iterate_over_symbols) (const struct block *block,
|
||
const char *name,
|
||
domain_enum domain,
|
||
int (*callback) (struct symbol *, void *),
|
||
void *data);
|
||
|
||
/* Add fields above this point, so the magic number is always last. */
|
||
/* Magic number for compat checking. */
|
||
|
||
long la_magic;
|
||
|
||
};
|
||
|
||
#define LANG_MAGIC 910823L
|
||
|
||
/* Pointer to the language_defn for our current language. This pointer
|
||
always points to *some* valid struct; it can be used without checking
|
||
it for validity.
|
||
|
||
The current language affects expression parsing and evaluation
|
||
(FIXME: it might be cleaner to make the evaluation-related stuff
|
||
separate exp_opcodes for each different set of semantics. We
|
||
should at least think this through more clearly with respect to
|
||
what happens if the language is changed between parsing and
|
||
evaluation) and printing of things like types and arrays. It does
|
||
*not* affect symbol-reading-- each source file in a symbol-file has
|
||
its own language and we should keep track of that regardless of the
|
||
language when symbols are read. If we want some manual setting for
|
||
the language of symbol files (e.g. detecting when ".c" files are
|
||
C++), it should be a separate setting from the current_language. */
|
||
|
||
extern const struct language_defn *current_language;
|
||
|
||
/* Pointer to the language_defn expected by the user, e.g. the language
|
||
of main(), or the language we last mentioned in a message, or C. */
|
||
|
||
extern const struct language_defn *expected_language;
|
||
|
||
/* language_mode ==
|
||
language_mode_auto: current_language automatically set upon selection
|
||
of scope (e.g. stack frame)
|
||
language_mode_manual: current_language set only by user. */
|
||
|
||
extern enum language_mode
|
||
{
|
||
language_mode_auto, language_mode_manual
|
||
}
|
||
language_mode;
|
||
|
||
struct type *language_bool_type (const struct language_defn *l,
|
||
struct gdbarch *gdbarch);
|
||
|
||
struct type *language_string_char_type (const struct language_defn *l,
|
||
struct gdbarch *gdbarch);
|
||
|
||
struct type *language_lookup_primitive_type_by_name (const struct language_defn *l,
|
||
struct gdbarch *gdbarch,
|
||
const char *name);
|
||
|
||
|
||
/* These macros define the behaviour of the expression
|
||
evaluator. */
|
||
|
||
/* Should we strictly type check expressions? */
|
||
#define STRICT_TYPE (type_check != type_check_off)
|
||
|
||
/* Should we range check values against the domain of their type? */
|
||
#define RANGE_CHECK (range_check != range_check_off)
|
||
|
||
/* "cast" really means conversion. */
|
||
/* FIXME -- should be a setting in language_defn. */
|
||
#define CAST_IS_CONVERSION(LANG) ((LANG)->la_language == language_c || \
|
||
(LANG)->la_language == language_cplus || \
|
||
(LANG)->la_language == language_objc)
|
||
|
||
extern void language_info (int);
|
||
|
||
extern enum language set_language (enum language);
|
||
|
||
|
||
/* This page contains functions that return things that are
|
||
specific to languages. Each of these functions is based on
|
||
the current setting of working_lang, which the user sets
|
||
with the "set language" command. */
|
||
|
||
#define LA_PRINT_TYPE(type,varstring,stream,show,level) \
|
||
(current_language->la_print_type(type,varstring,stream,show,level))
|
||
|
||
#define LA_PRINT_TYPEDEF(type,new_symbol,stream) \
|
||
(current_language->la_print_typedef(type,new_symbol,stream))
|
||
|
||
#define LA_VAL_PRINT(type,valaddr,offset,addr,stream,val,recurse,options) \
|
||
(current_language->la_val_print(type,valaddr,offset,addr,stream, \
|
||
val,recurse,options))
|
||
#define LA_VALUE_PRINT(val,stream,options) \
|
||
(current_language->la_value_print(val,stream,options))
|
||
|
||
#define LA_PRINT_CHAR(ch, type, stream) \
|
||
(current_language->la_printchar(ch, type, stream))
|
||
#define LA_PRINT_STRING(stream, elttype, string, length, encoding, force_ellipses, options) \
|
||
(current_language->la_printstr(stream, elttype, string, length, \
|
||
encoding, force_ellipses,options))
|
||
#define LA_EMIT_CHAR(ch, type, stream, quoter) \
|
||
(current_language->la_emitchar(ch, type, stream, quoter))
|
||
#define LA_GET_STRING(value, buffer, length, chartype, encoding) \
|
||
(current_language->la_get_string(value, buffer, length, chartype, encoding))
|
||
|
||
#define LA_PRINT_ARRAY_INDEX(index_value, stream, options) \
|
||
(current_language->la_print_array_index(index_value, stream, options))
|
||
|
||
#define LA_ITERATE_OVER_SYMBOLS(BLOCK, NAME, DOMAIN, CALLBACK, DATA) \
|
||
(current_language->la_iterate_over_symbols (BLOCK, NAME, DOMAIN, CALLBACK, \
|
||
DATA))
|
||
|
||
/* Test a character to decide whether it can be printed in literal form
|
||
or needs to be printed in another representation. For example,
|
||
in C the literal form of the character with octal value 141 is 'a'
|
||
and the "other representation" is '\141'. The "other representation"
|
||
is program language dependent. */
|
||
|
||
#define PRINT_LITERAL_FORM(c) \
|
||
((c) >= 0x20 \
|
||
&& ((c) < 0x7F || (c) >= 0xA0) \
|
||
&& (!sevenbit_strings || (c) < 0x80))
|
||
|
||
/* Type predicates */
|
||
|
||
extern int pointer_type (struct type *);
|
||
|
||
/* Checks Binary and Unary operations for semantic type correctness. */
|
||
/* FIXME: Does not appear to be used. */
|
||
#define unop_type_check(v,o) binop_type_check((v),NULL,(o))
|
||
|
||
extern void binop_type_check (struct value *, struct value *, int);
|
||
|
||
/* Error messages */
|
||
|
||
extern void type_error (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
|
||
|
||
extern void range_error (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
|
||
|
||
/* Data: Does this value represent "truth" to the current language? */
|
||
|
||
extern int value_true (struct value *);
|
||
|
||
/* Misc: The string representing a particular enum language. */
|
||
|
||
extern enum language language_enum (char *str);
|
||
|
||
extern const struct language_defn *language_def (enum language);
|
||
|
||
extern char *language_str (enum language);
|
||
|
||
/* Add a language to the set known by GDB (at initialization time). */
|
||
|
||
extern void add_language (const struct language_defn *);
|
||
|
||
extern enum language get_frame_language (void); /* In stack.c */
|
||
|
||
/* Check for a language-specific trampoline. */
|
||
|
||
extern CORE_ADDR skip_language_trampoline (struct frame_info *, CORE_ADDR pc);
|
||
|
||
/* Return demangled language symbol, or NULL. */
|
||
extern char *language_demangle (const struct language_defn *current_language,
|
||
const char *mangled, int options);
|
||
|
||
/* Return class name from physname, or NULL. */
|
||
extern char *language_class_name_from_physname (const struct language_defn *,
|
||
const char *physname);
|
||
|
||
/* Splitting strings into words. */
|
||
extern char *default_word_break_characters (void);
|
||
|
||
/* Print the index of an array element using the C99 syntax. */
|
||
extern void default_print_array_index (struct value *index_value,
|
||
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) */
|