/* Source-language-related definitions for GDB.
- Copyright (C) 1991-2020 Free Software Foundation, Inc.
+ Copyright (C) 1991-2021 Free Software Foundation, Inc.
Contributed by the Department of Computer Science at the State University
of New York at Buffalo.
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;
+ /* A default constructor. */
+ language_arch_info () = default;
- /* Symbol wrappers around primitive_type_vector, so that the symbol lookup
- machinery can return them. */
- struct symbol **primitive_type_symbols;
+ DISABLE_COPY_AND_ASSIGN (language_arch_info);
+
+ /* Set the default boolean type to be TYPE. If NAME is not nullptr then
+ before using TYPE a symbol called NAME will be looked up, and the type
+ of this symbol will be used instead. Should only be called once when
+ performing setup for a particular language in combination with a
+ particular gdbarch. */
+ void set_bool_type (struct type *type, const char *name = nullptr)
+ {
+ gdb_assert (m_bool_type_default == nullptr);
+ gdb_assert (m_bool_type_name == nullptr);
+ gdb_assert (type != nullptr);
+ m_bool_type_default = type;
+ m_bool_type_name = name;
+ }
+
+ /* Set the type to be used for characters within a string. Should only
+ be called once when performing setup for a particular language in
+ combination with a particular gdbarch. */
+ void set_string_char_type (struct type *type)
+ {
+ gdb_assert (m_string_char_type == nullptr);
+ gdb_assert (type != nullptr);
+ m_string_char_type = type;
+ }
+
+ /* Return the type for characters within a string. */
+ struct type *string_char_type () const
+ { return m_string_char_type; }
+
+ /* Return the type to be used for booleans. */
+ struct type *bool_type () const;
+
+ /* Add TYPE to the list of primitive types for this particular language,
+ with this OS/ABI combination. */
+ void add_primitive_type (struct type *type)
+ {
+ gdb_assert (type != nullptr);
+ primitive_types_and_symbols.push_back (type_and_symbol (type));
+ }
+
+ /* Lookup a primitive type called NAME. Will return nullptr if no
+ matching type is found. */
+ struct type *lookup_primitive_type (const char *name);
+
+ /* Lookup a primitive type for which FILTER returns true. Will return
+ nullptr if no matching type is found. */
+ struct type *lookup_primitive_type
+ (gdb::function_view<bool (struct type *)> filter);
+
+ /* Lookup a primitive type called NAME and return the type as a symbol.
+ LANG is the language for which type is being looked up. */
+ struct symbol *lookup_primitive_type_as_symbol (const char *name,
+ enum language lang);
+private:
+
+ /* A structure storing a type and a corresponding symbol. The type is
+ defined at construction time, while the symbol is lazily created only
+ when asked for, but is then cached for future use. */
+ struct type_and_symbol
+ {
+ /* Constructor. */
+ explicit type_and_symbol (struct type *type)
+ : m_type (type)
+ { /* Nothing. */ }
+
+ /* Default move constructor. */
+ type_and_symbol (type_and_symbol&&) = default;
+
+ DISABLE_COPY_AND_ASSIGN (type_and_symbol);
+
+ /* Return the type from this object. */
+ struct type *type () const
+ { return m_type; }
+
+ /* Create and return a symbol wrapping M_TYPE from this object. */
+ struct symbol *symbol (enum language lang)
+ {
+ if (m_symbol == nullptr)
+ m_symbol = alloc_type_symbol (lang, m_type);
+ return m_symbol;
+ }
+
+ private:
+ /* The type primitive type. */
+ struct type *m_type = nullptr;
+
+ /* A symbol wrapping M_TYPE, only created when first asked for. */
+ struct symbol *m_symbol = nullptr;
+
+ /* Helper function for type lookup as a symbol. Create the symbol
+ corresponding to type TYPE in language LANG. */
+ static struct symbol *alloc_type_symbol (enum language lang,
+ struct type *type);
+ };
+
+ /* Lookup a type_and_symbol entry from the primitive_types_and_symbols
+ vector for a type matching NAME. Return a pointer to the
+ type_and_symbol object from the vector. This will return nullptr if
+ there is no type matching NAME found. */
+ type_and_symbol *lookup_primitive_type_and_symbol (const char *name);
+
+ /* Vector of the primitive types added through add_primitive_type. These
+ types can be specified by name in parsing types in expressions,
+ regardless of whether the program being debugged actually defines such
+ a type.
+
+ Within the vector each type is paired with a lazily created symbol,
+ which can be fetched by the symbol lookup machinery, should they be
+ needed. */
+ std::vector<type_and_symbol> primitive_types_and_symbols;
/* Type of elements of strings. */
- struct type *string_char_type;
+ struct type *m_string_char_type = nullptr;
/* Symbol name of type to use as boolean type, if defined. */
- const char *bool_type_symbol;
+ const char *m_bool_type_name = nullptr;
+
/* Otherwise, this is the default boolean builtin type. */
- struct type *bool_type_default;
+ struct type *m_bool_type_default = nullptr;
};
/* In a language (particularly C++) a function argument of an aggregate
return {};
}
+ /* Return true if SYMBOL represents an entity that is not
+ supposed to be seen by the user. To be used to filter symbols
+ during printing. */
+ virtual bool symbol_printing_suppressed (struct symbol *symbol) const
+ {
+ return false;
+ }
+
/* The per-architecture (OS/ABI) language information. */
virtual void language_arch_info (struct gdbarch *,
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. */
+ /* 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. If compilation is not supported for this language
+ then this method returns NULL. */
- virtual compile_instance *get_compile_instance () const
- {
- return nullptr;
- }
+ virtual std::unique_ptr<compile_instance> get_compile_instance () const;
/* This method must be overridden if 'get_compile_instance' is
overridden.
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
+ virtual bool sniff_from_mangled_name
+ (const char *mangled, gdb::unique_xmalloc_ptr<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
+ virtual gdb::unique_xmalloc_ptr<char> demangle_symbol (const char *mangled,
+ int options) const
{
return nullptr;
}
- /* Print a type using syntax appropriate for this language. */
+ /* Print TYPE to STREAM using syntax appropriate for this language.
+ LEVEL is the depth to indent lines by. VARSTRING, if not NULL or the
+ empty string, is the name of a variable and TYPE should be printed in
+ the form of a declaration of a variable named VARSTRING. */
- virtual void print_type (struct type *, const char *, struct ui_file *, int,
- int, const struct type_print_options *) const = 0;
+ virtual void print_type (struct type *type, const char *varstring,
+ struct ui_file *stream, int show, int level,
+ const struct type_print_options *flags) const = 0;
/* PC is possibly an unknown languages trampoline.
If that PC falls in a trampoline belonging to this language, return
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. */
/* Return false if the language has first-class arrays. Return true if
there are no array values, and array objects decay to pointers, as in
C. The default is true as currently most supported languages behave
- in this manor. */
+ in this manner. */
virtual bool c_style_arrays_p () const
{ return true; }
virtual const struct lang_varobj_ops *varobj_ops () const;
- /* Definitions related to expression printing, prefixifying, and
- dumping. */
-
- virtual const struct exp_descriptor *expression_ops () const;
-
- /* Table for printing expressions. */
-
- virtual const struct op_print *opcode_print_table () const = 0;
-
protected:
/* This is the overridable part of the GET_SYMBOL_NAME_MATCHER method.
}
language_mode;
+/* Return the type that should be used for booleans for language L in
+ GDBARCH. */
+
struct type *language_bool_type (const struct language_defn *l,
struct gdbarch *gdbarch);
+/* Return the type that should be used for characters within a string for
+ language L in 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. */
+/* Look up a type from the set of OS/ABI specific types defined in
+ GDBARCH for language L. NAME is used for selecting the matching
+ type, and is passed through to the corresponding
+ lookup_primitive_type member function inside the language_arch_info
+ class. */
struct type *language_lookup_primitive_type (const struct language_defn *l,
struct gdbarch *gdbarch,
const char *name);
+/* Look up a type from the set of OS/ABI specific types defined in
+ GDBARCH for language L. FILTER is used for selecting the matching
+ type, and is passed through to the corresponding
+ lookup_primitive_type member function inside the language_arch_info
+ class. */
+
+struct type *language_lookup_primitive_type
+ (const struct language_defn *la,
+ struct gdbarch *gdbarch,
+ gdb::function_view<bool (struct type *)> filter);
+
/* Wrapper around language_lookup_primitive_type to return the
corresponding symbol. */
(LANG)->la_language == language_cplus || \
(LANG)->la_language == language_objc)
-extern void language_info (int);
+/* Print out the current language settings: language, range and
+ type checking. */
+
+extern void language_info ();
extern enum language set_language (enum language);
\f
#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))
/* Test a character to decide whether it can be printed in literal form
or needs to be printed in another representation. For example,
&& ((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 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);
+extern gdb::unique_xmalloc_ptr<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. */
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