/* Source-language-related definitions for GDB.
- Copyright (C) 1991, 1992, 1993, 1994, 1995, 1998, 1999, 2000, 2003, 2004,
- 2007, 2008 Free Software Foundation, Inc.
+ Copyright (C) 1991-2016 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"
+
+/* 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;
-/* This used to be included to configure GDB for one or more specific
- languages. Now it is left out to configure for all of them. FIXME. */
-/* #include "lang_def.h" */
-#define _LANG_c
-#define _LANG_m2
-#define _LANG_fortran
-#define _LANG_pascal
-
-#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
{
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
+ };
+
\f
/* Per architecture (OS/ABI) language information. */
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. */
+ const char *bool_type_symbol;
+ /* Otherwise, this is the default boolean builtin type. */
+ 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
{
- /* 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;
+
+ /* 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 */
+ dumping. */
const struct exp_descriptor *la_exp_desc;
- /* Parser function. */
+ /* Parser function. */
- int (*la_parser) (void);
+ int (*la_parser) (struct parser_state *);
- /* Parser error function */
+ /* Parser error function. */
void (*la_error) (char *);
void (*la_post_parser) (struct expression ** expp, int void_context_p);
- void (*la_printchar) (int ch, 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,
+ 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, const struct type_print_options *);
+
+ /* 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.
- void (*la_printstr) (struct ui_file * stream, const gdb_byte *string,
- unsigned int length, int width,
- int force_ellipses);
+ 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.
- void (*la_emitchar) (int ch, struct ui_file * stream, int quoter);
+ ADDRESS is the address in the inferior of the enclosing object.
- /* Print a type using syntax appropriate for this language. */
+ STREAM is the stream on which the value is to be printed.
- void (*la_print_type) (struct type *, char *, struct ui_file *, int,
- int);
+ RECURSE is the recursion depth. It is zero-based.
- /* Print a value using syntax appropriate for this language. */
+ OPTIONS are the formatting options to be used when
+ printing. */
- int (*la_val_print) (struct type *, const gdb_byte *, int, CORE_ADDR,
- struct ui_file *, int, int, int,
- enum val_prettyprint);
+ 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,
+ const struct value_print_options *options);
- /* Print a top-level value using syntax appropriate for this language. */
+ /* Print a top-level value using syntax appropriate for this language. */
- int (*la_value_print) (struct value *, struct ui_file *,
- int, enum val_prettyprint);
+ void (*la_value_print) (struct value *, struct ui_file *,
+ const struct value_print_options *);
+
+ /* 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. */
+
+ struct value *(*la_read_var_value) (struct symbol *var,
+ const struct block *var_block,
+ struct frame_info *frame);
/* PC is possibly an unknown languages trampoline.
If that PC falls in a trampoline belonging to this language,
the part of symbol lookup where C looks up static and global
variables. */
- struct symbol *(*la_lookup_symbol_nonlocal) (const char *,
- const char *,
- const struct block *,
- const domain_enum);
+ struct block_symbol (*la_lookup_symbol_nonlocal)
+ (const struct language_defn *,
+ 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);
+ /* 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);
- /* 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);
+ /* Should return a vector of 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);
/* The per-architecture (OS/ABI) language information. */
void (*la_language_arch_info) (struct gdbarch *,
/* Print the index of an element of an array. */
void (*la_print_array_index) (struct value *index_value,
struct ui_file *stream,
- int format,
- enum val_prettyprint pretty);
+ 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);
- /* Add fields above this point, so the magic number is always last. */
- /* Magic number for compat checking */
+ /* 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);
+
+ /* 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 and the DATA
+ argument. If CALLBACK returns zero, 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);
+
+ /* Various operations on varobj. */
+ const struct lang_varobj_ops *la_varobj_ops;
+
+ /* If this language allows compilation from the gdb command line,
+ this method should be non-NULL. When called it should return
+ an instance of struct gcc_context appropriate to the language.
+ When defined this method must never return NULL; instead it
+ should throw an exception on failure. The returned compiler
+ instance is owned by its caller and must be deallocated by
+ calling its 'destroy' method. */
+
+ struct 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.
+
+ 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. */
+
+ char *(*la_compute_program) (struct 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. */
long la_magic;
}
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);
+/* 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 */
-#define CAST_IS_CONVERSION (current_language->la_language == language_c || \
- current_language->la_language == language_cplus || \
- current_language->la_language == language_objc)
+/* "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);
/* 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,flags) \
+ (current_language->la_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_PRINT_TYPE(type,varstring,stream,show,level) \
- (current_language->la_print_type(type,varstring,stream,show,level))
+#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_VAL_PRINT(type,valaddr,offset,addr,stream,fmt,deref,recurse,pretty) \
- (current_language->la_val_print(type,valaddr,offset,addr,stream,fmt,deref, \
- recurse,pretty))
-#define LA_VALUE_PRINT(val,stream,fmt,pretty) \
- (current_language->la_value_print(val,stream,fmt,pretty))
+#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_CHAR(ch, stream) \
- (current_language->la_printchar(ch, stream))
-#define LA_PRINT_STRING(stream, string, length, width, force_ellipses) \
- (current_language->la_printstr(stream, string, length, width, force_ellipses))
-#define LA_EMIT_CHAR(ch, stream, quoter) \
- (current_language->la_emitchar(ch, stream, quoter))
+#define LA_PRINT_ARRAY_INDEX(index_value, stream, options) \
+ (current_language->la_print_array_index(index_value, stream, options))
-#define LA_PRINT_ARRAY_INDEX(index_value, stream, format, pretty) \
- (current_language->la_print_array_index(index_value, stream, format, pretty))
+#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. */
+ is program language dependent. */
#define PRINT_LITERAL_FORM(c) \
((c) >= 0x20 \
&& ((c) < 0x7F || (c) >= 0xA0) \
&& (!sevenbit_strings || (c) < 0x80))
-#if 0
-/* FIXME: cagney/2000-03-04: This function does not appear to be used.
- It can be deleted once 5.0 has been released. */
-/* Return a string that contains the hex digits of the number. No preceeding
- "0x" */
-
-extern char *longest_raw_hex_string (LONGEST);
-#endif
-
/* 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);
-
/* Error messages */
-extern void type_error (const char *, ...) ATTR_FORMAT (printf, 1, 2);
-
-extern void range_error (const char *, ...) ATTR_FORMAT (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 *);
-extern struct type *lang_bool_type (void);
-
-/* The type used for Boolean values in the current language. */
-#define LA_BOOL_TYPE lang_bool_type ()
-
/* 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);
+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);
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);
/* 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,
- int format,
- enum val_prettyprint pretty);
+ const struct value_print_options *options);
/* Return non-zero if TYPE should be passed (and returned) by
reference at the language level. */
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) */
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