1 /* Rust language support definitions for GDB, the GNU debugger.
3 Copyright (C) 2016-2021 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 std::vector<const char *> &filename_extensions () const override
76 static const std::vector<const char *> extensions = { ".rs" };
82 void language_arch_info (struct gdbarch *gdbarch,
83 struct language_arch_info *lai) const override;
87 bool sniff_from_mangled_name
88 (const char *mangled, gdb::unique_xmalloc_ptr<char> *demangled)
91 *demangled = gdb_demangle (mangled, DMGL_PARAMS | DMGL_ANSI);
92 return *demangled != NULL;
97 gdb::unique_xmalloc_ptr<char> demangle_symbol (const char *mangled,
98 int options) const override
100 return gdb_demangle (mangled, options);
103 /* See language.h. */
105 void print_type (struct type *type, const char *varstring,
106 struct ui_file *stream, int show, int level,
107 const struct type_print_options *flags) const override;
109 /* See language.h. */
111 gdb::unique_xmalloc_ptr<char> watch_location_expression
112 (struct type *type, CORE_ADDR addr) const override
114 type = check_typedef (TYPE_TARGET_TYPE (check_typedef (type)));
115 std::string name = type_to_string (type);
116 return gdb::unique_xmalloc_ptr<char>
117 (xstrprintf ("*(%s as *mut %s)", core_addr_to_string (addr),
121 /* See language.h. */
123 void value_print_inner
124 (struct value *val, struct ui_file *stream, int recurse,
125 const struct value_print_options *options) const override;
127 /* See language.h. */
129 struct block_symbol lookup_symbol_nonlocal
130 (const char *name, const struct block *block,
131 const domain_enum domain) const override
133 struct block_symbol result = {};
135 if (symbol_lookup_debug)
137 fprintf_unfiltered (gdb_stdlog,
138 "rust_lookup_symbol_non_local"
139 " (%s, %s (scope %s), %s)\n",
140 name, host_address_to_string (block),
141 block_scope (block), domain_name (domain));
144 /* Look up bare names in the block's scope. */
145 std::string scopedname;
146 if (name[cp_find_first_component (name)] == '\0')
148 const char *scope = block_scope (block);
150 if (scope[0] != '\0')
152 scopedname = std::string (scope) + "::" + name;
153 name = scopedname.c_str ();
161 result = lookup_symbol_in_static_block (name, block, domain);
162 if (result.symbol == NULL)
163 result = lookup_global_symbol (name, block, domain);
168 /* See language.h. */
170 int parser (struct parser_state *ps) const override;
172 /* See language.h. */
174 void emitchar (int ch, struct type *chtype,
175 struct ui_file *stream, int quoter) const override;
177 /* See language.h. */
179 void printchar (int ch, struct type *chtype,
180 struct ui_file *stream) const override
182 fputs_filtered ("'", stream);
183 emitchar (ch, chtype, stream, '\'');
184 fputs_filtered ("'", stream);
187 /* See language.h. */
189 void printstr (struct ui_file *stream, struct type *elttype,
190 const gdb_byte *string, unsigned int length,
191 const char *encoding, int force_ellipses,
192 const struct value_print_options *options) const override;
194 /* See language.h. */
196 void print_typedef (struct type *type, struct symbol *new_symbol,
197 struct ui_file *stream) const override
199 type = check_typedef (type);
200 fprintf_filtered (stream, "type %s = ", new_symbol->print_name ());
201 type_print (type, "", stream, 0);
202 fprintf_filtered (stream, ";");
205 /* See language.h. */
207 bool is_string_type_p (struct type *type) const override;
209 /* See language.h. */
211 bool range_checking_on_by_default () const override
216 /* Helper for value_print_inner, arguments are as for that function.
217 Prints structs and untagged unions. */
219 void val_print_struct (struct value *val, struct ui_file *stream,
221 const struct value_print_options *options) const;
223 /* Helper for value_print_inner, arguments are as for that function.
224 Prints discriminated unions (Rust enums). */
226 void print_enum (struct value *val, struct ui_file *stream, int recurse,
227 const struct value_print_options *options) const;
230 #endif /* RUST_LANG_H */