/* Source-language-related definitions for GDB.
- Copyright (C) 1991-2016 Free Software Foundation, Inc.
+ Copyright (C) 1991-2019 Free Software Foundation, Inc.
Contributed by the Department of Computer Science at the State University
of New York at Buffalo.
#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 expression;
struct ui_file;
struct value_print_options;
struct type_print_options;
struct lang_varobj_ops;
struct parser_state;
-struct compile_instance;
+class compile_instance;
+struct completion_match_for_lcd;
+class innermost_block_tracker;
#define MAX_FORTRAN_DIMS 7 /* Maximum number of F77 array dims. */
struct type *bool_type_default;
};
-/* A pointer to a function expected to return nonzero if
- SYMBOL_SEARCH_NAME matches the given LOOKUP_NAME.
-
- SYMBOL_SEARCH_NAME should be a symbol's "search" name.
- LOOKUP_NAME should be the name of an entity after it has been
- transformed for lookup. */
-
-typedef int (*symbol_name_cmp_ftype) (const char *symbol_search_name,
- const char *lookup_name);
-
/* Structure tying together assorted information about a language. */
struct language_defn
int (*la_parser) (struct parser_state *);
- /* 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_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);
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
printing. */
void (*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,
+ struct value *val,
const struct value_print_options *options);
/* Print a top-level value using syntax appropriate for 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
/* Return demangled language symbol, or NULL. */
char *(*la_demangle) (const char *mangled, int options);
+ /* 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 0, then *DEMANGLED must always be set
+ to NULL.
+
+ If this function returns 1, 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. */
+ int (*la_sniff_from_mangled_name) (const char *mangled, char **demangled);
+
/* Return class name of a mangled method name or NULL. */
char *(*la_class_name_from_physname) (const char *physname);
char string_lower_bound;
/* The list of characters forming word boundaries. */
- char *(*la_word_break_characters) (void);
+ const char *(*la_word_break_characters) (void);
- /* Should return a vector of all symbols which are possible
+ /* 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. */
- VEC (char_ptr) *(*la_make_symbol_completion_list) (const char *text,
- const char *word,
- enum type_code code);
+ 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);
/* The per-architecture (OS/ABI) language information. */
void (*la_language_arch_info) (struct gdbarch *,
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);
-
- /* Return a pointer to the function that should be used to match
- a symbol name against LOOKUP_NAME. This is mostly for languages
- such as Ada where the matching algorithm depends on LOOKUP_NAME.
-
- This field may be NULL, in which case strcmp_iw will be used
- to perform the matching. */
- symbol_name_cmp_ftype (*la_get_symbol_name_cmp) (const char *lookup_name);
+ /* 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 &);
/* Find all symbols in the current program space matching NAME in
DOMAIN, according to this language's rules.
The caller is responsible for iterating up through superblocks
if desired.
- For each one, call CALLBACK with the symbol and the DATA
- argument. If CALLBACK returns zero, the iteration ends at that
- point.
+ 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. */
- void (*la_iterate_over_symbols) (const struct block *block,
- const char *name,
- domain_enum domain,
- symbol_found_callback_ftype *callback,
- void *data);
+ bool (*la_iterate_over_symbols)
+ (const struct block *block, const lookup_name_info &name,
+ domain_enum domain,
+ gdb::function_view<symbol_found_callback_ftype> callback);
+
+ /* Hash the given symbol search name. Use
+ default_search_name_hash if no special treatment is
+ required. */
+ unsigned int (*la_search_name_hash) (const char *name);
/* Various operations on varobj. */
const struct lang_varobj_ops *la_varobj_ops;
instance is owned by its caller and must be deallocated by
calling its 'destroy' method. */
- struct compile_instance *(*la_get_compile_instance) (void);
+ compile_instance *(*la_get_compile_instance) (void);
/* 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 newly malloc'd
- bit of code to compile. The caller owns the result.
+ 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.
parsed.
EXPR_PC is the PC at which the expression is being parsed. */
- char *(*la_compute_program) (struct compile_instance *inst,
- const char *input,
- struct gdbarch *gdbarch,
- const struct block *expr_block,
- CORE_ADDR expr_pc);
+ std::string (*la_compute_program) (compile_instance *inst,
+ const char *input,
+ struct gdbarch *gdbarch,
+ const struct block *expr_block,
+ CORE_ADDR expr_pc);
- /* Add fields above this point, so the magic number is always last. */
- /* Magic number for compat checking. */
+ /* Return true if TYPE is a string type. */
+ bool (*la_is_string_type_p) (struct type *type);
- long la_magic;
+ /* 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
-
/* 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.
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)
#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))
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))
+#define LA_ITERATE_OVER_SYMBOLS(BLOCK, NAME, DOMAIN, CALLBACK) \
+ (current_language->la_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,
extern int pointer_type (struct type *);
+/* 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 range_error (const char *, ...) ATTRIBUTE_PRINTF (1, 2);
/* 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 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 *);
-
/* Check for a language-specific trampoline. */
extern CORE_ADDR skip_language_trampoline (struct frame_info *, CORE_ADDR pc);
extern char *language_demangle (const struct language_defn *current_language,
const char *mangled, int options);
+/* A wrapper for la_sniff_from_mangled_name. The arguments and result
+ are as for the method. */
+
+extern int language_sniff_from_mangled_name (const struct language_defn *lang,
+ const char *mangled,
+ char **demangled);
+
/* 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);
+extern const 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,
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);
+/* Default name hashing function. */
+
+/* Produce an unsigned hash value from SEARCH_NAME that is consistent
+ with strcmp_iw, strcmp, and, at least on Ada symbols, wild_match.
+ That is, two identifiers equivalent according to any of those three
+ comparison operators hash to the same value. */
+extern unsigned int default_search_name_hash (const char *search_name);
+
+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);
+
+/* The languages supported by GDB. */
+
+extern const struct language_defn auto_language_defn;
+extern const struct language_defn unknown_language_defn;
+extern const struct language_defn minimal_language_defn;
+
+extern const struct language_defn ada_language_defn;
+extern const struct language_defn asm_language_defn;
+extern const struct language_defn c_language_defn;
+extern const struct language_defn cplus_language_defn;
+extern const struct language_defn d_language_defn;
+extern const struct language_defn f_language_defn;
+extern const struct language_defn go_language_defn;
+extern const struct language_defn m2_language_defn;
+extern const struct language_defn objc_language_defn;
+extern const struct language_defn opencl_language_defn;
+extern const struct language_defn pascal_language_defn;
+extern const struct language_defn rust_language_defn;
+
+/* 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);
-void c_get_string (struct value *value, gdb_byte **buffer, int *length,
- struct type **char_type, const char **charset);
+private:
+ bool m_switched;
+ enum language m_lang;
+};
#endif /* defined (LANGUAGE_H) */
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