| /* Source-language-related definitions for GDB. |
| |
| Copyright (C) 1991-2020 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 |
| |
| #include "symtab.h" |
| #include "gdbsupport/function-view.h" |
| #include "expression.h" |
| |
| /* Forward decls for prototypes. */ |
| struct value; |
| struct objfile; |
| struct frame_info; |
| 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. */ |
| |
| /* 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; |
| |
| /* 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; |
| |
| /* 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. */ |
| const char *bool_type_symbol; |
| /* Otherwise, this is the default boolean builtin type. */ |
| struct type *bool_type_default; |
| }; |
| |
| /* 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; |
| }; |
| |
| /* Splitting strings into words. */ |
| extern const char *default_word_break_characters (void); |
| |
| /* Structure tying together assorted information about a language. |
| |
| 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. */ |
| |
| const char *la_name; |
| |
| /* Natural or official name of the language. */ |
| |
| const char *la_natural_name; |
| |
| /* its symtab language-enum (defs.h). */ |
| |
| enum language la_language; |
| |
| /* Default range checking. */ |
| |
| enum range_check la_range_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; |
| |
| /* 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 char *const *la_filename_extensions; |
| |
| /* Definitions related to expression printing, prefixifying, and |
| dumping. */ |
| |
| const struct exp_descriptor *la_exp_desc; |
| |
| /* 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. */ |
| |
| 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; |
| |
| /* 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; |
| |
| /* Various operations on varobj. */ |
| const struct lang_varobj_ops *la_varobj_ops; |
| |
| /* 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; |
| |
| }; |
| |
| /* 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); |
| } |
| |
| /* 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. |
| |
| As Ada wants to capture symbol matching for all languages in some |
| cases, then this method is a non-overridable interface. Languages |
| should override GET_SYMBOL_NAME_MATCHER_INNER if they need to. */ |
| |
| symbol_name_matcher_ftype *get_symbol_name_matcher |
| (const lookup_name_info &lookup_name) const; |
| |
| /* 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; |
| } |
| |
| /* This method must be overridden if 'get_compile_instance' is |
| overridden. |
| |
| 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. */ |
| |
| virtual std::string compute_program (compile_instance *inst, |
| const char *input, |
| struct gdbarch *gdbarch, |
| const struct block *expr_block, |
| CORE_ADDR expr_pc) const |
| { |
| gdb_assert_not_reached ("language_defn::compute_program"); |
| } |
| |
| /* 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; |
| } |
| |
| /* Return demangled language symbol version of MANGLED, or NULL. */ |
| virtual char *demangle (const char *mangled, int options) const |
| { |
| return nullptr; |
| } |
| |
| /* 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; |
| |
| /* 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. */ |
| virtual CORE_ADDR skip_trampoline (struct frame_info *fi, CORE_ADDR pc) const |
| { |
| return (CORE_ADDR) 0; |
| } |
| |
| /* Return class name of a mangled method name or NULL. */ |
| virtual char *class_name_from_physname (const char *physname) const |
| { |
| return nullptr; |
| } |
| |
| /* The list of characters forming word boundaries. */ |
| virtual const char *word_break_characters (void) const |
| { |
| return default_word_break_characters (); |
| } |
| |
| /* 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. */ |
| |
| virtual void collect_symbol_completion_matches |
| (completion_tracker &tracker, |
| complete_symbol_mode mode, |
| symbol_name_match_type name_match_type, |
| const char *text, |
| const char *word, |
| enum type_code code) const |
| { |
| return default_collect_symbol_completion_matches_break_on |
| (tracker, mode, name_match_type, text, word, "", code); |
| } |
| |
| /* 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. This default implements the basic C lookup rules. */ |
| |
| virtual struct block_symbol lookup_symbol_nonlocal |
| (const char *name, |
| const struct block *block, |
| const domain_enum domain) const; |
| |
| /* 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. */ |
| virtual gdb::unique_xmalloc_ptr<char> watch_location_expression |
| (struct type *type, CORE_ADDR addr) const; |
| |
| /* List of all known languages. */ |
| static const struct language_defn *languages[nr_languages]; |
| |
| /* Print a top-level value using syntax appropriate for this language. */ |
| virtual void value_print (struct value *val, struct ui_file *stream, |
| const struct value_print_options *options) const; |
| |
| /* Print a value using syntax appropriate for this language. RECURSE is |
| the recursion depth. It is zero-based. */ |
| virtual void value_print_inner |
| (struct value *val, struct ui_file *stream, int recurse, |
| const struct value_print_options *options) const; |
| |
| /* Parser function. */ |
| |
| virtual int parser (struct parser_state *ps) const; |
| |
| /* 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. If COMPLETING is |
| non-zero, then the expression has been parsed for completion, not |
| evaluation. */ |
| |
| virtual void post_parser (expression_up *expp, int void_context_p, |
| int completing, |
| innermost_block_tracker *tracker) const |
| { |
| /* By default the post-parser does nothing. */ |
| } |
| |
| /* Print the character CH (of type CHTYPE) on STREAM as part of the |
| contents of a literal string whose delimiter is QUOTER. */ |
| |
| virtual void emitchar (int ch, struct type *chtype, |
| struct ui_file *stream, int quoter) const; |
| |
| virtual void printchar (int ch, struct type *chtype, |
| struct ui_file * stream) const; |
| |
| /* Print the character string STRING, printing at most LENGTH characters. |
| Printing stops early if the number hits print_max; repeat counts |
| are printed as appropriate. Print ellipses at the end if we |
| had to stop before printing LENGTH characters, or if FORCE_ELLIPSES. */ |
| |
| virtual void 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 *options) const; |
| |
| |
| /* 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. */ |
| |
| virtual void print_typedef (struct type *type, struct symbol *new_symbol, |
| struct ui_file *stream) const; |
| |
| /* Return true if TYPE is a string type. */ |
| virtual bool is_string_type_p (struct type *type) const; |
| |
| protected: |
| |
| /* This is the overridable part of the GET_SYMBOL_NAME_MATCHER method. |
| See that method for a description of the arguments. */ |
| |
| virtual symbol_name_matcher_ftype *get_symbol_name_matcher_inner |
| (const lookup_name_info &lookup_name) const; |
| }; |
| |
| /* 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; |
| |
| /* 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) |
| 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); |
| |
| /* 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); |
| |
| |
| /* These macros define the behaviour of the expression |
| evaluator. */ |
| |
| /* 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,flags) \ |
| (current_language->print_type(type,varstring,stream,show,level,flags)) |
| |
| #define LA_PRINT_TYPEDEF(type,new_symbol,stream) \ |
| (current_language->print_typedef (type,new_symbol,stream)) |
| |
| #define LA_VALUE_PRINT(val,stream,options) \ |
| (current_language->value_print (val,stream,options)) |
| |
| #define LA_PRINT_CHAR(ch, type, stream) \ |
| (current_language->printchar (ch, type, stream)) |
| #define LA_PRINT_STRING(stream, elttype, string, length, encoding, force_ellipses, options) \ |
| (current_language->printstr (stream, elttype, string, length, \ |
| encoding, force_ellipses,options)) |
| #define LA_EMIT_CHAR(ch, type, stream, quoter) \ |
| (current_language->emitchar (ch, type, stream, quoter)) |
| |
| #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. */ |
| |
| #define PRINT_LITERAL_FORM(c) \ |
| ((c) >= 0x20 \ |
| && ((c) < 0x7F || (c) >= 0xA0) \ |
| && (!sevenbit_strings || (c) < 0x80)) |
| |
| /* Type predicates */ |
| |
| extern int pointer_type (struct type *); |
| |
| /* Error messages */ |
| |
| 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 (const char *str); |
| |
| extern const struct language_defn *language_def (enum language); |
| |
| extern const char *language_str (enum language); |
| |
| /* 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 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); |
| |
| void c_get_string (struct value *value, |
| gdb::unique_xmalloc_ptr<gdb_byte> *buffer, |
| int *length, struct type **char_type, |
| const char **charset); |
| |
| /* 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); |
| } |
| |
| DISABLE_COPY_AND_ASSIGN (scoped_switch_to_sym_language_if_auto); |
| |
| private: |
| bool m_switched; |
| enum language m_lang; |
| }; |
| |
| #endif /* defined (LANGUAGE_H) */ |