1 /* Rust language support definitions for GDB, the GNU debugger.
3 Copyright (C) 2016-2022 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
31 /* Return true if TYPE is a tuple type; otherwise false. */
32 extern bool rust_tuple_type_p (struct type *type);
34 /* Return true if TYPE is a tuple struct type; otherwise false. */
35 extern bool rust_tuple_struct_type_p (struct type *type);
37 /* Given a block, find the name of the block's crate. Returns an empty
38 stringif no crate name can be found. */
39 extern std::string rust_crate_for_block (const struct block *block);
41 /* Returns the last segment of a Rust path like foo::bar::baz. Will
42 not handle cases where the last segment contains generics. */
44 extern const char *rust_last_path_segment (const char *path);
46 /* Create a new slice type. NAME is the name of the type. ELT_TYPE
47 is the type of the elements of the slice. USIZE_TYPE is the Rust
48 "usize" type to use. The new type is allocated whereever ELT_TYPE
50 extern struct type *rust_slice_type (const char *name, struct type *elt_type,
51 struct type *usize_type);
53 /* Class representing the Rust language. */
55 class rust_language : public language_defn
59 : language_defn (language_rust)
64 const char *name () const override
69 const char *natural_name () const override
74 const char *get_digit_separator () const override
79 const std::vector<const char *> &filename_extensions () const override
81 static const std::vector<const char *> extensions = { ".rs" };
87 void language_arch_info (struct gdbarch *gdbarch,
88 struct language_arch_info *lai) const override;
92 bool sniff_from_mangled_name
93 (const char *mangled, gdb::unique_xmalloc_ptr<char> *demangled)
96 *demangled = gdb_demangle (mangled, DMGL_PARAMS | DMGL_ANSI);
97 return *demangled != NULL;
100 /* See language.h. */
102 gdb::unique_xmalloc_ptr<char> demangle_symbol (const char *mangled,
103 int options) const override
105 return gdb_demangle (mangled, options);
108 /* See language.h. */
110 bool can_print_type_offsets () const override
115 /* See language.h. */
117 void print_type (struct type *type, const char *varstring,
118 struct ui_file *stream, int show, int level,
119 const struct type_print_options *flags) const override;
121 /* See language.h. */
123 gdb::unique_xmalloc_ptr<char> watch_location_expression
124 (struct type *type, CORE_ADDR addr) const override
126 type = check_typedef (check_typedef (type)->target_type ());
127 std::string name = type_to_string (type);
128 return xstrprintf ("*(%s as *mut %s)", core_addr_to_string (addr),
132 /* See language.h. */
134 void value_print_inner
135 (struct value *val, struct ui_file *stream, int recurse,
136 const struct value_print_options *options) const override;
138 /* See language.h. */
140 void value_print (struct value *val, struct ui_file *stream,
141 const struct value_print_options *options) const override;
143 /* See language.h. */
145 struct block_symbol lookup_symbol_nonlocal
146 (const char *name, const struct block *block,
147 const domain_enum domain) const override
149 struct block_symbol result = {};
151 if (symbol_lookup_debug)
153 gdb_printf (gdb_stdlog,
154 "rust_lookup_symbol_non_local"
155 " (%s, %s (scope %s), %s)\n",
156 name, host_address_to_string (block),
157 block_scope (block), domain_name (domain));
160 /* Look up bare names in the block's scope. */
161 std::string scopedname;
162 if (name[cp_find_first_component (name)] == '\0')
164 const char *scope = block_scope (block);
166 if (scope[0] != '\0')
168 scopedname = std::string (scope) + "::" + name;
169 name = scopedname.c_str ();
177 result = lookup_symbol_in_static_block (name, block, domain);
178 if (result.symbol == NULL)
179 result = lookup_global_symbol (name, block, domain);
184 /* See language.h. */
186 int parser (struct parser_state *ps) const override;
188 /* See language.h. */
190 void emitchar (int ch, struct type *chtype,
191 struct ui_file *stream, int quoter) const override;
193 /* See language.h. */
195 void printchar (int ch, struct type *chtype,
196 struct ui_file *stream) const override
198 gdb_puts ("'", stream);
199 emitchar (ch, chtype, stream, '\'');
200 gdb_puts ("'", stream);
203 /* See language.h. */
205 void printstr (struct ui_file *stream, struct type *elttype,
206 const gdb_byte *string, unsigned int length,
207 const char *encoding, int force_ellipses,
208 const struct value_print_options *options) const override;
210 /* See language.h. */
212 void print_typedef (struct type *type, struct symbol *new_symbol,
213 struct ui_file *stream) const override
215 type = check_typedef (type);
216 gdb_printf (stream, "type %s = ", new_symbol->print_name ());
217 type_print (type, "", stream, 0);
218 gdb_printf (stream, ";");
221 /* See language.h. */
223 bool is_string_type_p (struct type *type) const override;
225 /* See language.h. */
227 bool range_checking_on_by_default () const override
232 /* Helper for value_print_inner, arguments are as for that function.
233 Prints structs and untagged unions. */
235 void val_print_struct (struct value *val, struct ui_file *stream,
237 const struct value_print_options *options) const;
239 /* Helper for value_print_inner, arguments are as for that function.
240 Prints discriminated unions (Rust enums). */
242 void print_enum (struct value *val, struct ui_file *stream, int recurse,
243 const struct value_print_options *options) const;
246 #endif /* RUST_LANG_H */