239 lines
6.6 KiB
C++
239 lines
6.6 KiB
C++
/* Rust language support definitions for GDB, the GNU debugger.
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Copyright (C) 2016-2022 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef RUST_LANG_H
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#define RUST_LANG_H
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#include "demangle.h"
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#include "language.h"
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#include "value.h"
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#include "c-lang.h"
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struct parser_state;
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struct type;
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/* Return true if TYPE is a tuple type; otherwise false. */
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extern bool rust_tuple_type_p (struct type *type);
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/* Return true if TYPE is a tuple struct type; otherwise false. */
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extern bool rust_tuple_struct_type_p (struct type *type);
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/* Given a block, find the name of the block's crate. Returns an empty
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stringif no crate name can be found. */
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extern std::string rust_crate_for_block (const struct block *block);
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/* Returns the last segment of a Rust path like foo::bar::baz. Will
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not handle cases where the last segment contains generics. */
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extern const char *rust_last_path_segment (const char *path);
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/* Create a new slice type. NAME is the name of the type. ELT_TYPE
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is the type of the elements of the slice. USIZE_TYPE is the Rust
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"usize" type to use. The new type is allocated whereever ELT_TYPE
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is allocated. */
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extern struct type *rust_slice_type (const char *name, struct type *elt_type,
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struct type *usize_type);
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/* Class representing the Rust language. */
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class rust_language : public language_defn
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{
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public:
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rust_language ()
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: language_defn (language_rust)
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{ /* Nothing. */ }
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/* See language.h. */
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const char *name () const override
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{ return "rust"; }
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/* See language.h. */
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const char *natural_name () const override
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{ return "Rust"; }
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/* See language.h. */
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const char *get_digit_separator () const override
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{ return "_"; }
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/* See language.h. */
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const std::vector<const char *> &filename_extensions () const override
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{
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static const std::vector<const char *> extensions = { ".rs" };
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return extensions;
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}
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/* See language.h. */
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void language_arch_info (struct gdbarch *gdbarch,
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struct language_arch_info *lai) const override;
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/* See language.h. */
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bool sniff_from_mangled_name
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(const char *mangled, gdb::unique_xmalloc_ptr<char> *demangled)
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const override
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{
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*demangled = gdb_demangle (mangled, DMGL_PARAMS | DMGL_ANSI);
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return *demangled != NULL;
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}
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/* See language.h. */
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gdb::unique_xmalloc_ptr<char> demangle_symbol (const char *mangled,
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int options) const override
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{
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return gdb_demangle (mangled, options);
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}
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/* See language.h. */
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void print_type (struct type *type, const char *varstring,
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struct ui_file *stream, int show, int level,
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const struct type_print_options *flags) const override;
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/* See language.h. */
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gdb::unique_xmalloc_ptr<char> watch_location_expression
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(struct type *type, CORE_ADDR addr) const override
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{
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type = check_typedef (TYPE_TARGET_TYPE (check_typedef (type)));
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std::string name = type_to_string (type);
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return xstrprintf ("*(%s as *mut %s)", core_addr_to_string (addr),
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name.c_str ());
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}
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/* See language.h. */
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void value_print_inner
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(struct value *val, struct ui_file *stream, int recurse,
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const struct value_print_options *options) const override;
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/* See language.h. */
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void value_print (struct value *val, struct ui_file *stream,
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const struct value_print_options *options) const override;
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/* See language.h. */
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struct block_symbol lookup_symbol_nonlocal
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(const char *name, const struct block *block,
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const domain_enum domain) const override
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{
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struct block_symbol result = {};
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if (symbol_lookup_debug)
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{
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gdb_printf (gdb_stdlog,
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"rust_lookup_symbol_non_local"
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" (%s, %s (scope %s), %s)\n",
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name, host_address_to_string (block),
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block_scope (block), domain_name (domain));
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}
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/* Look up bare names in the block's scope. */
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std::string scopedname;
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if (name[cp_find_first_component (name)] == '\0')
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{
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const char *scope = block_scope (block);
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if (scope[0] != '\0')
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{
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scopedname = std::string (scope) + "::" + name;
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name = scopedname.c_str ();
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}
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else
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name = NULL;
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}
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if (name != NULL)
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{
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result = lookup_symbol_in_static_block (name, block, domain);
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if (result.symbol == NULL)
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result = lookup_global_symbol (name, block, domain);
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}
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return result;
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}
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/* See language.h. */
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int parser (struct parser_state *ps) const override;
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/* See language.h. */
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void emitchar (int ch, struct type *chtype,
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struct ui_file *stream, int quoter) const override;
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/* See language.h. */
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void printchar (int ch, struct type *chtype,
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struct ui_file *stream) const override
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{
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gdb_puts ("'", stream);
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emitchar (ch, chtype, stream, '\'');
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gdb_puts ("'", stream);
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}
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/* See language.h. */
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void printstr (struct ui_file *stream, struct type *elttype,
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const gdb_byte *string, unsigned int length,
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const char *encoding, int force_ellipses,
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const struct value_print_options *options) const override;
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/* See language.h. */
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void print_typedef (struct type *type, struct symbol *new_symbol,
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struct ui_file *stream) const override
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{
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type = check_typedef (type);
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gdb_printf (stream, "type %s = ", new_symbol->print_name ());
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type_print (type, "", stream, 0);
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gdb_printf (stream, ";");
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}
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/* See language.h. */
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bool is_string_type_p (struct type *type) const override;
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/* See language.h. */
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bool range_checking_on_by_default () const override
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{ return true; }
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private:
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/* Helper for value_print_inner, arguments are as for that function.
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Prints structs and untagged unions. */
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void val_print_struct (struct value *val, struct ui_file *stream,
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int recurse,
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const struct value_print_options *options) const;
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/* Helper for value_print_inner, arguments are as for that function.
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Prints discriminated unions (Rust enums). */
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void print_enum (struct value *val, struct ui_file *stream, int recurse,
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const struct value_print_options *options) const;
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};
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#endif /* RUST_LANG_H */
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