/* Source-language-related definitions for GDB.
- Copyright (C) 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2000, 2003, 2004,
- 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+ Copyright (C) 1991-2020 Free Software Foundation, Inc.
Contributed by the Department of Computer Science at the State University
of New York at Buffalo.
#if !defined (LANGUAGE_H)
#define LANGUAGE_H 1
-/* Forward decls for prototypes */
+#include "symtab.h"
+#include "gdbsupport/function-view.h"
+#include "expression.h"
+
+/* Forward decls for prototypes. */
struct value;
struct objfile;
struct frame_info;
-struct expression;
struct ui_file;
struct value_print_options;
+struct type_print_options;
+struct lang_varobj_ops;
+struct parser_state;
+class compile_instance;
+struct completion_match_for_lcd;
+class innermost_block_tracker;
-#define MAX_FORTRAN_DIMS 7 /* Maximum number of F77 array dims */
+#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_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_auto: case_sensitivity set upon selection of scope.
case_mode_manual: case_sensitivity set only by user. */
extern enum case_mode
case_mode;
/* array_ordering ==
- array_row_major: Arrays are in row major order
- array_column_major: Arrays are in column major order.*/
+ array_row_major: Arrays are in row major order.
+ array_column_major: Arrays are in column major order. */
extern enum 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 */
+ 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
{
/* macro_expansion ==
- macro_expansion_no: No macro expansion is available
- macro_expansion_c: C-like macro expansion is available */
+ macro_expansion_no: No macro expansion is available.
+ macro_expansion_c: C-like macro expansion is available. */
enum macro_expansion
{
expressions, regardless of whether the program being debugged
actually defines such a type. */
struct type **primitive_type_vector;
- /* Type of elements of strings. */
+
+ /* Symbol wrappers around primitive_type_vector, so that the symbol lookup
+ machinery can return them. */
+ struct symbol **primitive_type_symbols;
+
+ /* Type of elements of strings. */
struct type *string_char_type;
/* Symbol name of type to use as boolean type, if defined. */
struct type *bool_type_default;
};
-/* Structure tying together assorted information about a language. */
+/* In a language (particularly C++) a function argument of an aggregate
+ type (i.e. class/struct/union) may be implicitly passed by reference
+ even though it is declared a call-by-value argument in the source.
+ The struct below puts together necessary information for GDB to be
+ able to detect and carry out pass-by-reference semantics for a
+ particular type. This type is referred as T in the inlined comments
+ below.
+
+ The default values of the fields are chosen to give correct semantics
+ for primitive types and for simple aggregate types, such as
+
+ class T {
+ int x;
+ }; */
+
+struct language_pass_by_ref_info
+{
+ /* True if an argument of type T can be passed to a function by value
+ (i.e. not through an implicit reference). False, otherwise. */
+ bool trivially_copyable = true;
+
+ /* True if a copy of a value of type T can be initialized by
+ memcpy'ing the value bit-by-bit. False, otherwise.
+ E.g. If T has a user-defined copy ctor, this should be false. */
+ bool trivially_copy_constructible = true;
+
+ /* True if a value of type T can be destructed simply by reclaiming
+ the memory area occupied by the value. False, otherwise.
+ E.g. If T has a user-defined destructor, this should be false. */
+ bool trivially_destructible = true;
+
+ /* True if it is allowed to create a copy of a value of type T.
+ False, otherwise.
+ E.g. If T has a deleted copy ctor, this should be false. */
+ bool copy_constructible = true;
+
+ /* True if a value of type T can be destructed. False, otherwise.
+ E.g. If T has a deleted destructor, this should be false. */
+ bool destructible = true;
+};
+
+/* Structure tying together assorted information about a language.
-struct language_defn
+ As we move over from the old structure based languages to a class
+ hierarchy of languages this structure will continue to contain a
+ mixture of both data and function pointers.
+
+ Once the class hierarchy of languages in place the first task is to
+ remove the function pointers from this structure and convert them into
+ member functions on the different language classes.
+
+ The current plan it to keep the constant data that describes a language
+ in this structure, and have each language pass in an instance of this
+ structure at construction time. */
+
+struct language_data
{
- /* Name of the language */
+ /* Name of the language. */
- char *la_name;
+ const char *la_name;
- /* its symtab language-enum (defs.h) */
+ /* Natural or official name of the language. */
- enum language la_language;
+ const char *la_natural_name;
- /* Default range checking */
+ /* its symtab language-enum (defs.h). */
- enum range_check la_range_check;
+ enum language la_language;
- /* Default type checking */
+ /* Default range checking. */
- enum type_check la_type_check;
+ enum range_check la_range_check;
- /* Default case sensitivity */
+ /* Default case sensitivity. */
enum case_sensitivity la_case_sensitivity;
- /* Multi-dimensional array ordering */
+ /* 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 */
+ /* A NULL-terminated array of file extensions for this language.
+ The extension must include the ".", like ".c". If this
+ language doesn't need to provide any filename extensions, this
+ may be NULL. */
- const struct exp_descriptor *la_exp_desc;
+ const char *const *la_filename_extensions;
- /* Parser function. */
+ /* Definitions related to expression printing, prefixifying, and
+ dumping. */
- int (*la_parser) (void);
+ const struct exp_descriptor *la_exp_desc;
- /* Parser error function */
+ /* Parser function. */
- void (*la_error) (char *);
+ int (*la_parser) (struct parser_state *);
/* 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_CONTEXT_P, then no value is expected from the expression.
+ If COMPLETING is non-zero, then the expression has been parsed
+ for completion, not evaluation. */
- void (*la_post_parser) (struct expression ** expp, int void_context_p);
+ void (*la_post_parser) (expression_up *expp, int void_context_p,
+ int completing, innermost_block_tracker *tracker);
- void (*la_printchar) (int ch, struct type *chtype, struct ui_file * stream);
+ 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,
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 *, 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. */
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.
+ RECURSE is the recursion depth. It is zero-based. */
- STREAM is the stream on which the value is to be printed.
+ void (*la_value_print_inner) (struct value *, struct ui_file *,
+ int recurse,
+ const struct value_print_options *);
- RECURSE is the recursion depth. It is zero-based.
+ /* Print a top-level value using syntax appropriate for this language. */
- 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 *);
+ void (*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,
/* 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;
+ const char *la_name_of_this;
+
+ /* True if the symbols names should be stored in GDB's data structures
+ for minimal/partial/full symbols using their linkage (aka mangled)
+ form; false if the symbol names should be demangled first.
+
+ Most languages implement symbol lookup by comparing the demangled
+ names, in which case it is advantageous to store that information
+ already demangled, and so would set this field to false.
+
+ On the other hand, some languages have opted for doing symbol
+ lookups by comparing mangled names instead, for reasons usually
+ specific to the language. Those languages should set this field
+ to true.
+
+ And finally, other languages such as C or Asm do not have
+ the concept of mangled vs demangled name, so those languages
+ should set this field to true as well, to prevent any accidental
+ demangling through an unrelated language's demangler. */
+
+ const bool la_store_sym_names_in_linkage_form_p;
/* 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 *);
+ struct block_symbol (*la_lookup_symbol_nonlocal)
+ (const struct language_defn *,
+ const char *,
+ const struct block *,
+ const domain_enum);
/* 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 */
+ /* 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. */
+ 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. */
+ /* 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);
-
- /* Add fields above this point, so the magic number is always last. */
- /* Magic number for compat checking */
-
- long la_magic;
+ const char *(*la_word_break_characters) (void);
+
+ /* Add to the completion tracker all symbols which are possible
+ completions for TEXT. WORD is the entire command on which the
+ completion is being made. If CODE is TYPE_CODE_UNDEF, then all
+ symbols should be examined; otherwise, only STRUCT_DOMAIN
+ symbols whose type has a code of CODE should be matched. */
+ void (*la_collect_symbol_completion_matches)
+ (completion_tracker &tracker,
+ complete_symbol_mode mode,
+ symbol_name_match_type match_type,
+ const char *text,
+ const char *word,
+ enum type_code code);
+
+ /* Return an expression that can be used for a location
+ watchpoint. TYPE is a pointer type that points to the memory
+ to watch, and ADDR is the address of the watched memory. */
+ gdb::unique_xmalloc_ptr<char> (*la_watch_location_expression)
+ (struct type *type, CORE_ADDR addr);
+
+ /* Return a pointer to the function that should be used to match a
+ symbol name against LOOKUP_NAME, according to this language's
+ rules. The matching algorithm depends on LOOKUP_NAME. For
+ example, on Ada, the matching algorithm depends on the symbol
+ name (wild/full/verbatim matching), and on whether we're doing
+ a normal lookup or a completion match lookup.
+
+ This field may be NULL, in which case
+ default_symbol_name_matcher is used to perform the
+ matching. */
+ symbol_name_matcher_ftype *(*la_get_symbol_name_matcher)
+ (const lookup_name_info &);
+
+ /* Various operations on varobj. */
+ const struct lang_varobj_ops *la_varobj_ops;
+
+ /* This method must be defined if 'la_get_gcc_context' is defined.
+ If 'la_get_gcc_context' is not defined, then this method is
+ ignored.
+
+ This takes the user-supplied text and returns a new bit of code
+ to compile.
+
+ INST is the compiler instance being used.
+ INPUT is the user's input text.
+ GDBARCH is the architecture to use.
+ EXPR_BLOCK is the block in which the expression is being
+ parsed.
+ EXPR_PC is the PC at which the expression is being parsed. */
+
+ std::string (*la_compute_program) (compile_instance *inst,
+ const char *input,
+ struct gdbarch *gdbarch,
+ const struct block *expr_block,
+ CORE_ADDR expr_pc);
+
+ /* Return true if TYPE is a string type. */
+ bool (*la_is_string_type_p) (struct type *type);
+
+ /* This string is used by the 'set print max-depth' setting. When GDB
+ replaces a struct or union (during value printing) that is "too
+ deep" this string is displayed instead. */
+ const char *la_struct_too_deep_ellipsis;
};
-#define LANG_MAGIC 910823L
+/* Base class from which all other language classes derive. */
+
+struct language_defn : language_data
+{
+ language_defn (enum language lang, const language_data &init_data)
+ : language_data (init_data)
+ {
+ /* We should only ever create one instance of each language. */
+ gdb_assert (languages[lang] == nullptr);
+ languages[lang] = this;
+ }
+
+ /* Print the index of an element of an array. This default
+ implementation prints using C99 syntax. */
+
+ virtual void print_array_index (struct type *index_type,
+ LONGEST index_value,
+ struct ui_file *stream,
+ const value_print_options *options) const;
+
+ /* Given a symbol VAR, the corresponding block VAR_BLOCK (if any) and a
+ stack frame id FRAME, read the value of the variable and return (pointer
+ to a) struct value containing the value.
+
+ VAR_BLOCK is needed if there's a possibility for VAR to be outside
+ FRAME. This is what happens if FRAME correspond to a nested function
+ and VAR is defined in the outer function. If callers know that VAR is
+ located in FRAME or is global/static, NULL can be passed as VAR_BLOCK.
+
+ Throw an error if the variable cannot be found. */
+
+ virtual struct value *read_var_value (struct symbol *var,
+ const struct block *var_block,
+ struct frame_info *frame) const;
+
+ /* Return information about whether TYPE should be passed
+ (and returned) by reference at the language level. The default
+ implementation returns a LANGUAGE_PASS_BY_REF_INFO initialised in its
+ default state. */
+
+ virtual struct language_pass_by_ref_info pass_by_reference_info
+ (struct type *type) const
+ {
+ return {};
+ }
+
+ /* The per-architecture (OS/ABI) language information. */
+
+ virtual void language_arch_info (struct gdbarch *,
+ struct language_arch_info *) const = 0;
+
+ /* Find the definition of the type with the given name. */
+
+ virtual struct type *lookup_transparent_type (const char *name) const
+ {
+ return basic_lookup_transparent_type (name);
+ }
+
+ /* Find all symbols in the current program space matching NAME in
+ DOMAIN, according to this language's rules.
+
+ The search is done in BLOCK only.
+ The caller is responsible for iterating up through superblocks
+ if desired.
+
+ For each one, call CALLBACK with the symbol. If CALLBACK
+ returns false, the iteration ends at that point.
+
+ This field may not be NULL. If the language does not need any
+ special processing here, 'iterate_over_symbols' should be
+ used as the definition. */
+ virtual bool iterate_over_symbols
+ (const struct block *block, const lookup_name_info &name,
+ domain_enum domain,
+ gdb::function_view<symbol_found_callback_ftype> callback) const
+ {
+ return ::iterate_over_symbols (block, name, domain, callback);
+ }
+
+ /* If this language allows compilation from the gdb command line, then
+ this method will return an instance of struct gcc_context appropriate
+ to the language. If compilation for this language is generally
+ supported, but something goes wrong then an exception is thrown. The
+ returned compiler instance is owned by its caller and must be
+ deallocated by the caller. If compilation is not supported for this
+ language then this method returns NULL. */
+
+ virtual compile_instance *get_compile_instance () const
+ {
+ return nullptr;
+ }
+
+ /* Hash the given symbol search name. */
+ virtual unsigned int search_name_hash (const char *name) const;
+
+ /* Demangle a symbol according to this language's rules. Unlike
+ la_demangle, this does not take any options.
+
+ *DEMANGLED will be set by this function.
+
+ If this function returns false, then *DEMANGLED must always be set
+ to NULL.
+
+ If this function returns true, the implementation may set this to
+ a xmalloc'd string holding the demangled form. However, it is
+ not required to. The string, if any, is owned by the caller.
+
+ The resulting string should be of the form that will be
+ installed into a symbol. */
+ virtual bool sniff_from_mangled_name (const char *mangled,
+ char **demangled) const
+ {
+ *demangled = nullptr;
+ return false;
+ }
+
+ /* Print a type using syntax appropriate for this language. */
+
+ virtual void print_type (struct type *, const char *, struct ui_file *, int,
+ int, const struct type_print_options *) const = 0;
+
+ /* List of all known languages. */
+ static const struct language_defn *languages[nr_languages];
+};
/* Pointer to the language_defn for our current language. This pointer
always points to *some* valid struct; it can be used without checking
extern const struct language_defn *expected_language;
+/* Warning issued when current_language and the language of the current
+ frame do not match. */
+
+extern const char lang_frame_mismatch_warn[];
+
/* language_mode ==
language_mode_auto: current_language automatically set upon selection
of scope (e.g. stack frame)
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);
+/* Look up type NAME in language L, and return its definition for architecture
+ GDBARCH. Returns NULL if not found. */
+
+struct type *language_lookup_primitive_type (const struct language_defn *l,
+ struct gdbarch *gdbarch,
+ const char *name);
+
+/* Wrapper around language_lookup_primitive_type to return the
+ corresponding symbol. */
+
+struct symbol *
+ language_lookup_primitive_type_as_symbol (const struct language_defn *l,
+ struct gdbarch *gdbarch,
+ const char *name);
\f
/* 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? */
+/* 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 */
+/* "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)
/* 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. */
+ 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_TYPE(type,varstring,stream,show,level,flags) \
+ (current_language->print_type(type,varstring,stream,show,level,flags))
#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) \
+#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, optins) \
- (current_language->la_print_array_index(index_value, stream, options))
+#define LA_PRINT_ARRAY_INDEX(index_type, index_value, stream, options) \
+ (current_language->print_array_index(index_type, index_value, stream, \
+ options))
+
+#define LA_ITERATE_OVER_SYMBOLS(BLOCK, NAME, DOMAIN, CALLBACK) \
+ (current_language->iterate_over_symbols (BLOCK, NAME, DOMAIN, CALLBACK))
/* 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. */
+ is program language dependent. */
#define PRINT_LITERAL_FORM(c) \
((c) >= 0x20 \
/* Type predicates */
-extern int simple_type (struct type *);
-
-extern int ordered_type (struct type *);
-
-extern int same_type (struct type *, struct type *);
-
-extern int integral_type (struct type *);
-
-extern int numeric_type (struct type *);
-
-extern int character_type (struct type *);
-
-extern int boolean_type (struct type *);
-
-extern int float_type (struct type *);
-
extern int pointer_type (struct type *);
-extern int structured_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);
+/* Return true if TYPE is a string type, otherwise return false. This
+ default implementation only detects TYPE_CODE_STRING. */
+extern bool default_is_string_type_p (struct type *type);
/* 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? */
/* Misc: The string representing a particular enum language. */
-extern enum language language_enum (char *str);
+extern enum language language_enum (const char *str);
extern const struct language_defn *language_def (enum language);
-extern char *language_str (enum language);
+extern const 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. */
+/* Check for a language-specific trampoline. */
extern CORE_ADDR skip_language_trampoline (struct frame_info *, CORE_ADDR pc);
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);
+extern const char *default_word_break_characters (void);
-/* 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);
+/* Return information about whether TYPE should be passed
+ (and returned) by reference at the language level. */
+struct language_pass_by_ref_info language_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::unique_xmalloc_ptr<gdb_byte> *buffer,
+ int *length, struct type **char_type,
+ const char **charset);
+
+/* The default implementation of la_symbol_name_matcher. Matches with
+ strncmp_iw. */
+extern bool default_symbol_name_matcher
+ (const char *symbol_search_name,
+ const lookup_name_info &lookup_name,
+ completion_match_result *comp_match_res);
+
+/* Get LANG's symbol_name_matcher method for LOOKUP_NAME. Returns
+ default_symbol_name_matcher if not set. LANG is used as a hint;
+ the function may ignore it depending on the current language and
+ LOOKUP_NAME. Specifically, if the current language is Ada, this
+ may return an Ada matcher regardless of LANG. */
+symbol_name_matcher_ftype *get_symbol_name_matcher
+ (const language_defn *lang, const lookup_name_info &lookup_name);
+
+/* Save the current language and restore it upon destruction. */
+
+class scoped_restore_current_language
+{
+public:
+
+ explicit scoped_restore_current_language ()
+ : m_lang (current_language->la_language)
+ {
+ }
+
+ ~scoped_restore_current_language ()
+ {
+ set_language (m_lang);
+ }
+
+ scoped_restore_current_language (const scoped_restore_current_language &)
+ = delete;
+ scoped_restore_current_language &operator=
+ (const scoped_restore_current_language &) = delete;
+
+private:
+
+ enum language m_lang;
+};
+
+/* If language_mode is language_mode_auto,
+ then switch current language to the language of SYM
+ and restore current language upon destruction.
+
+ Else do nothing. */
+
+class scoped_switch_to_sym_language_if_auto
+{
+public:
+
+ explicit scoped_switch_to_sym_language_if_auto (const struct symbol *sym)
+ {
+ if (language_mode == language_mode_auto)
+ {
+ m_lang = current_language->la_language;
+ m_switched = true;
+ set_language (sym->language ());
+ }
+ else
+ {
+ m_switched = false;
+ /* Assign to m_lang to silence a GCC warning. See
+ https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80635. */
+ m_lang = language_unknown;
+ }
+ }
+
+ ~scoped_switch_to_sym_language_if_auto ()
+ {
+ if (m_switched)
+ set_language (m_lang);
+ }
-void c_get_string (struct value *value, gdb_byte **buffer, int *length,
- struct type **char_type, const char **charset);
+ DISABLE_COPY_AND_ASSIGN (scoped_switch_to_sym_language_if_auto);
+
+private:
+ bool m_switched;
+ enum language m_lang;
+};
#endif /* defined (LANGUAGE_H) */
projects / thirdparty / binutils-gdb.git / blobdiff