/* Helper routines for C++ support in GDB.
- Copyright (C) 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 2003-2020 Free Software Foundation, Inc.
Contributed by David Carlton and by Kealia, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "cp-support.h"
#include "gdb_obstack.h"
#include "symtab.h"
#include "symfile.h"
-#include "gdb_assert.h"
#include "block.h"
#include "objfiles.h"
#include "gdbtypes.h"
#include "dictionary.h"
#include "command.h"
#include "frame.h"
+#include "buildsym.h"
+#include "language.h"
+#include "namespace.h"
+#include <string>
+
+static struct block_symbol
+ cp_lookup_nested_symbol_1 (struct type *container_type,
+ const char *nested_name,
+ const char *concatenated_name,
+ const struct block *block,
+ const domain_enum domain,
+ int basic_lookup, int is_in_anonymous);
-/* When set, the file that we're processing is known to have debugging
- info for C++ namespaces. */
+static struct type *cp_lookup_transparent_type_loop (const char *name,
+ const char *scope,
+ int scope_len);
+
+/* Check to see if SYMBOL refers to an object contained within an
+ anonymous namespace; if so, add an appropriate using directive. */
+
+void
+cp_scan_for_anonymous_namespaces (struct buildsym_compunit *compunit,
+ const struct symbol *const symbol,
+ struct objfile *const objfile)
+{
+ if (symbol->demangled_name () != NULL)
+ {
+ const char *name = symbol->demangled_name ();
+ unsigned int previous_component;
+ unsigned int next_component;
-/* NOTE: carlton/2004-01-13: No currently released version of GCC (the
- latest of which is 3.3.x at the time of this writing) produces this
- debug info. GCC 3.4 should, however. */
+ /* Start with a quick-and-dirty check for mention of "(anonymous
+ namespace)". */
-unsigned char processing_has_namespace_info;
+ if (!cp_is_in_anonymous (name))
+ return;
-/* This contains our best guess as to the name of the current
- enclosing namespace(s)/class(es), if any. For example, if we're
- within the method foo() in the following code:
+ previous_component = 0;
+ next_component = cp_find_first_component (name + previous_component);
- namespace N {
- class C {
- void foo () {
+ while (name[next_component] == ':')
+ {
+ if (((next_component - previous_component)
+ == CP_ANONYMOUS_NAMESPACE_LEN)
+ && strncmp (name + previous_component,
+ CP_ANONYMOUS_NAMESPACE_STR,
+ CP_ANONYMOUS_NAMESPACE_LEN) == 0)
+ {
+ int dest_len = (previous_component == 0
+ ? 0 : previous_component - 2);
+ int src_len = next_component;
+
+ char *dest = (char *) alloca (dest_len + 1);
+ char *src = (char *) alloca (src_len + 1);
+
+ memcpy (dest, name, dest_len);
+ memcpy (src, name, src_len);
+
+ dest[dest_len] = '\0';
+ src[src_len] = '\0';
+
+ /* We've found a component of the name that's an
+ anonymous namespace. So add symbols in it to the
+ namespace given by the previous component if there is
+ one, or to the global namespace if there isn't. */
+ std::vector<const char *> excludes;
+ add_using_directive (compunit->get_local_using_directives (),
+ dest, src, NULL, NULL, excludes,
+ 1, &objfile->objfile_obstack);
+ }
+ /* The "+ 2" is for the "::". */
+ previous_component = next_component + 2;
+ next_component = (previous_component
+ + cp_find_first_component (name
+ + previous_component));
}
- };
}
+}
- then processing_current_prefix should be set to "N::C". If
- processing_has_namespace_info is false, then this variable might
- not be reliable. */
+/* Test whether or not NAMESPACE looks like it mentions an anonymous
+ namespace; return nonzero if so. */
-const char *processing_current_prefix;
+int
+cp_is_in_anonymous (const char *symbol_name)
+{
+ return (strstr (symbol_name, CP_ANONYMOUS_NAMESPACE_STR)
+ != NULL);
+}
-/* List of using directives that are active in the current file. */
+/* Look up NAME in DOMAIN in BLOCK's static block and in global blocks.
+ If IS_IN_ANONYMOUS is nonzero, the symbol in question is located
+ within an anonymous namespace. */
-static struct using_direct *using_list;
+static struct block_symbol
+cp_basic_lookup_symbol (const char *name, const struct block *block,
+ const domain_enum domain, int is_in_anonymous)
+{
+ struct block_symbol sym;
-static struct using_direct *cp_add_using (const char *name,
- unsigned int inner_len,
- unsigned int outer_len,
- struct using_direct *next);
+ sym = lookup_symbol_in_static_block (name, block, domain);
+ if (sym.symbol != NULL)
+ return sym;
-static struct using_direct *cp_copy_usings (struct using_direct *using,
- struct obstack *obstack);
+ if (is_in_anonymous)
+ {
+ /* Symbols defined in anonymous namespaces have external linkage
+ but should be treated as local to a single file nonetheless.
+ So we only search the current file's global block. */
-static struct symbol *lookup_namespace_scope (const char *name,
- const char *linkage_name,
- const struct block *block,
- const domain_enum domain,
- struct symtab **symtab,
- const char *scope,
- int scope_len);
+ const struct block *global_block = block_global_block (block);
-static struct symbol *lookup_symbol_file (const char *name,
- const char *linkage_name,
- const struct block *block,
- const domain_enum domain,
- struct symtab **symtab,
- int anonymous_namespace);
+ if (global_block != NULL)
+ {
+ sym.symbol = lookup_symbol_in_block (name,
+ symbol_name_match_type::FULL,
+ global_block, domain);
+ sym.block = global_block;
+ }
+ }
+ else
+ sym = lookup_global_symbol (name, block, domain);
-static struct type *cp_lookup_transparent_type_loop (const char *name,
- const char *scope,
- int scope_len);
+ return sym;
+}
-static void initialize_namespace_symtab (struct objfile *objfile);
+/* Search bare symbol NAME in DOMAIN in BLOCK.
+ NAME is guaranteed to not have any scope (no "::") in its name, though
+ if for example NAME is a template spec then "::" may appear in the
+ argument list.
+ If LANGDEF is non-NULL then try to lookup NAME as a primitive type in
+ that language. Normally we wouldn't need LANGDEF but fortran also uses
+ this code.
+ If SEARCH is non-zero then see if we can determine "this" from BLOCK, and
+ if so then also search for NAME in that class. */
+
+static struct block_symbol
+cp_lookup_bare_symbol (const struct language_defn *langdef,
+ const char *name, const struct block *block,
+ const domain_enum domain, int search)
+{
+ struct block_symbol sym;
-static struct block *get_possible_namespace_block (struct objfile *objfile);
+ /* Note: We can't do a simple assert for ':' not being in NAME because
+ ':' may be in the args of a template spec. This isn't intended to be
+ a complete test, just cheap and documentary. */
+ if (strchr (name, '<') == NULL && strchr (name, '(') == NULL)
+ gdb_assert (strstr (name, "::") == NULL);
-static void free_namespace_block (struct symtab *symtab);
+ sym = lookup_symbol_in_static_block (name, block, domain);
+ if (sym.symbol != NULL)
+ return sym;
-static int check_possible_namespace_symbols_loop (const char *name,
- int len,
- struct objfile *objfile);
+ /* If we didn't find a definition for a builtin type in the static block,
+ search for it now. This is actually the right thing to do and can be
+ a massive performance win. E.g., when debugging a program with lots of
+ shared libraries we could search all of them only to find out the
+ builtin type isn't defined in any of them. This is common for types
+ like "void". */
+ if (langdef != NULL && domain == VAR_DOMAIN)
+ {
+ struct gdbarch *gdbarch;
+
+ if (block == NULL)
+ gdbarch = target_gdbarch ();
+ else
+ gdbarch = block_gdbarch (block);
+ sym.symbol
+ = language_lookup_primitive_type_as_symbol (langdef, gdbarch, name);
+ sym.block = NULL;
+ if (sym.symbol != NULL)
+ return sym;
+ }
-static int check_one_possible_namespace_symbol (const char *name,
- int len,
- struct objfile *objfile);
+ sym = lookup_global_symbol (name, block, domain);
+ if (sym.symbol != NULL)
+ return sym;
-static
-struct symbol *lookup_possible_namespace_symbol (const char *name,
- struct symtab **symtab);
+ if (search)
+ {
+ struct block_symbol lang_this;
+ struct type *type;
-static void maintenance_cplus_namespace (char *args, int from_tty);
+ lang_this.symbol = NULL;
-/* Set up support for dealing with C++ namespace info in the current
- symtab. */
+ if (langdef != NULL)
+ lang_this = lookup_language_this (langdef, block);
-void cp_initialize_namespace ()
+ if (lang_this.symbol == NULL)
+ return {};
+
+
+ type = check_typedef (TYPE_TARGET_TYPE (SYMBOL_TYPE (lang_this.symbol)));
+ /* If TYPE_NAME is NULL, abandon trying to find this symbol.
+ This can happen for lambda functions compiled with clang++,
+ which outputs no name for the container class. */
+ if (TYPE_NAME (type) == NULL)
+ return {};
+
+ /* Look for symbol NAME in this class. */
+ sym = cp_lookup_nested_symbol (type, name, block, domain);
+ }
+
+ return sym;
+}
+
+/* Search NAME in DOMAIN in all static blocks, and then in all baseclasses.
+ BLOCK specifies the context in which to perform the search.
+ NAME is guaranteed to have scope (contain "::") and PREFIX_LEN specifies
+ the length of the entire scope of NAME (up to, but not including, the last
+ "::".
+
+ Note: At least in the case of Fortran, which also uses this code, there
+ may be no text after the last "::". */
+
+static struct block_symbol
+cp_search_static_and_baseclasses (const char *name,
+ const struct block *block,
+ const domain_enum domain,
+ unsigned int prefix_len,
+ int is_in_anonymous)
{
- processing_has_namespace_info = 0;
- using_list = NULL;
+ /* Check for malformed input. */
+ if (prefix_len + 2 > strlen (name) || name[prefix_len + 1] != ':')
+ return {};
+
+ /* The class, namespace or function name is everything up to and
+ including PREFIX_LEN. */
+ std::string scope (name, prefix_len);
+
+ /* The rest of the name is everything else past the initial scope
+ operator. */
+ const char *nested = name + prefix_len + 2;
+
+ /* Lookup the scope symbol. If none is found, there is nothing more
+ that can be done. SCOPE could be a namespace, so always look in
+ VAR_DOMAIN. This works for classes too because of
+ symbol_matches_domain (which should be replaced with something
+ else, but it's what we have today). */
+ block_symbol scope_sym = lookup_symbol_in_static_block (scope.c_str (),
+ block, VAR_DOMAIN);
+ if (scope_sym.symbol == NULL)
+ scope_sym = lookup_global_symbol (scope.c_str (), block, VAR_DOMAIN);
+ if (scope_sym.symbol == NULL)
+ return {};
+
+ struct type *scope_type = SYMBOL_TYPE (scope_sym.symbol);
+
+ /* If the scope is a function/method, then look up NESTED as a local
+ static variable. E.g., "print 'function()::static_var'". */
+ if ((TYPE_CODE (scope_type) == TYPE_CODE_FUNC
+ || TYPE_CODE (scope_type) == TYPE_CODE_METHOD)
+ && domain == VAR_DOMAIN)
+ return lookup_symbol (nested, SYMBOL_BLOCK_VALUE (scope_sym.symbol),
+ VAR_DOMAIN, NULL);
+
+ /* Look for a symbol named NESTED in this class/namespace.
+ The caller is assumed to have already have done a basic lookup of NAME.
+ So we pass zero for BASIC_LOOKUP to cp_lookup_nested_symbol_1 here. */
+ return cp_lookup_nested_symbol_1 (scope_type, nested, name,
+ block, domain, 0, is_in_anonymous);
}
-/* Add all the using directives we've gathered to the current symtab.
- STATIC_BLOCK should be the symtab's static block; OBSTACK is used
- for allocation. */
+/* Look up NAME in the C++ namespace NAMESPACE. Other arguments are
+ as in cp_lookup_symbol_nonlocal. If SEARCH is non-zero, search
+ through base classes for a matching symbol.
-void
-cp_finalize_namespace (struct block *static_block,
- struct obstack *obstack)
+ Note: Part of the complexity is because NAME may itself specify scope.
+ Part of the complexity is also because this handles the case where
+ there is no scoping in which case we also try looking in the class of
+ "this" if we can compute it. */
+
+static struct block_symbol
+cp_lookup_symbol_in_namespace (const char *the_namespace, const char *name,
+ const struct block *block,
+ const domain_enum domain, int search)
{
- if (using_list != NULL)
+ char *concatenated_name = NULL;
+ int is_in_anonymous;
+ unsigned int prefix_len;
+ struct block_symbol sym;
+
+ if (the_namespace[0] != '\0')
{
- block_set_using (static_block,
- cp_copy_usings (using_list, obstack),
- obstack);
- using_list = NULL;
+ concatenated_name
+ = (char *) alloca (strlen (the_namespace) + 2 + strlen (name) + 1);
+ strcpy (concatenated_name, the_namespace);
+ strcat (concatenated_name, "::");
+ strcat (concatenated_name, name);
+ name = concatenated_name;
}
-}
-/* Check to see if SYMBOL refers to an object contained within an
- anonymous namespace; if so, add an appropriate using directive. */
+ prefix_len = cp_entire_prefix_len (name);
+ if (prefix_len == 0)
+ return cp_lookup_bare_symbol (NULL, name, block, domain, search);
-/* Optimize away strlen ("(anonymous namespace)"). */
+ /* This would be simpler if we just called cp_lookup_nested_symbol
+ at this point. But that would require first looking up the containing
+ class/namespace. Since we're only searching static and global blocks
+ there's often no need to first do that lookup. */
-#define ANONYMOUS_NAMESPACE_LEN 21
+ is_in_anonymous
+ = the_namespace[0] != '\0' && cp_is_in_anonymous (the_namespace);
+ sym = cp_basic_lookup_symbol (name, block, domain, is_in_anonymous);
+ if (sym.symbol != NULL)
+ return sym;
-void
-cp_scan_for_anonymous_namespaces (const struct symbol *symbol)
+ if (search)
+ sym = cp_search_static_and_baseclasses (name, block, domain, prefix_len,
+ is_in_anonymous);
+
+ return sym;
+}
+
+/* Search for NAME by applying all import statements belonging to
+ BLOCK which are applicable in SCOPE. If DECLARATION_ONLY the
+ search is restricted to using declarations.
+ Example:
+
+ namespace A {
+ int x;
+ }
+ using A::x;
+
+ If SEARCH_PARENTS the search will include imports which are
+ applicable in parents of SCOPE.
+ Example:
+
+ namespace A {
+ using namespace X;
+ namespace B {
+ using namespace Y;
+ }
+ }
+
+ If SCOPE is "A::B" and SEARCH_PARENTS is true the imports of
+ namespaces X and Y will be considered. If SEARCH_PARENTS is false
+ only the import of Y is considered.
+
+ SEARCH_SCOPE_FIRST is an internal implementation detail: Callers must
+ pass 0 for it. Internally we pass 1 when recursing. */
+
+static struct block_symbol
+cp_lookup_symbol_via_imports (const char *scope,
+ const char *name,
+ const struct block *block,
+ const domain_enum domain,
+ const int search_scope_first,
+ const int declaration_only,
+ const int search_parents)
{
- if (!processing_has_namespace_info
- && SYMBOL_CPLUS_DEMANGLED_NAME (symbol) != NULL)
- {
- const char *name = SYMBOL_CPLUS_DEMANGLED_NAME (symbol);
- unsigned int previous_component;
- unsigned int next_component;
- const char *len;
+ struct using_direct *current;
+ struct block_symbol sym = {};
+ int len;
+ int directive_match;
- /* Start with a quick-and-dirty check for mention of "(anonymous
- namespace)". */
+ /* First, try to find the symbol in the given namespace if requested. */
+ if (search_scope_first)
+ sym = cp_lookup_symbol_in_namespace (scope, name,
+ block, domain, 1);
- if (!cp_is_anonymous (name))
- return;
+ if (sym.symbol != NULL)
+ return sym;
- previous_component = 0;
- next_component = cp_find_first_component (name + previous_component);
+ /* Go through the using directives. If any of them add new names to
+ the namespace we're searching in, see if we can find a match by
+ applying them. */
- while (name[next_component] == ':')
+ for (current = block_using (block);
+ current != NULL;
+ current = current->next)
+ {
+ const char **excludep;
+
+ len = strlen (current->import_dest);
+ directive_match = (search_parents
+ ? (startswith (scope, current->import_dest)
+ && (len == 0
+ || scope[len] == ':'
+ || scope[len] == '\0'))
+ : strcmp (scope, current->import_dest) == 0);
+
+ /* If the import destination is the current scope or one of its
+ ancestors then it is applicable. */
+ if (directive_match && !current->searched)
{
- if ((next_component - previous_component) == ANONYMOUS_NAMESPACE_LEN
- && strncmp (name + previous_component,
- "(anonymous namespace)",
- ANONYMOUS_NAMESPACE_LEN) == 0)
+ /* Mark this import as searched so that the recursive call
+ does not search it again. */
+ scoped_restore reset_directive_searched
+ = make_scoped_restore (¤t->searched, 1);
+
+ /* If there is an import of a single declaration, compare the
+ imported declaration (after optional renaming by its alias)
+ with the sought out name. If there is a match pass
+ current->import_src as NAMESPACE to direct the search
+ towards the imported namespace. */
+ if (current->declaration
+ && strcmp (name, current->alias
+ ? current->alias : current->declaration) == 0)
+ sym = cp_lookup_symbol_in_namespace (current->import_src,
+ current->declaration,
+ block, domain, 1);
+
+ /* If this is a DECLARATION_ONLY search or a symbol was found
+ or this import statement was an import declaration, the
+ search of this import is complete. */
+ if (declaration_only || sym.symbol != NULL || current->declaration)
{
- /* We've found a component of the name that's an
- anonymous namespace. So add symbols in it to the
- namespace given by the previous component if there is
- one, or to the global namespace if there isn't. */
- cp_add_using_directive (name,
- previous_component == 0
- ? 0 : previous_component - 2,
- next_component);
+ if (sym.symbol != NULL)
+ return sym;
+
+ continue;
}
- /* The "+ 2" is for the "::". */
- previous_component = next_component + 2;
- next_component = (previous_component
- + cp_find_first_component (name
- + previous_component));
+
+ /* Do not follow CURRENT if NAME matches its EXCLUDES. */
+ for (excludep = current->excludes; *excludep; excludep++)
+ if (strcmp (name, *excludep) == 0)
+ break;
+ if (*excludep)
+ continue;
+
+ if (current->alias != NULL
+ && strcmp (name, current->alias) == 0)
+ /* If the import is creating an alias and the alias matches
+ the sought name. Pass current->import_src as the NAME to
+ direct the search towards the aliased namespace. */
+ {
+ sym = cp_lookup_symbol_in_namespace (scope,
+ current->import_src,
+ block, domain, 1);
+ }
+ else if (current->alias == NULL)
+ {
+ /* If this import statement creates no alias, pass
+ current->inner as NAMESPACE to direct the search
+ towards the imported namespace. */
+ sym = cp_lookup_symbol_via_imports (current->import_src,
+ name, block,
+ domain, 1, 0, 0);
+ }
+
+ if (sym.symbol != NULL)
+ return sym;
}
}
+
+ return {};
}
-/* Add a using directive to using_list. NAME is the start of a string
- that should contain the namespaces we want to add as initial
- substrings, OUTER_LENGTH is the end of the outer namespace, and
- INNER_LENGTH is the end of the inner namespace. If the using
- directive in question has already been added, don't add it
- twice. */
+/* Helper function that searches an array of symbols for one named NAME. */
-void
-cp_add_using_directive (const char *name, unsigned int outer_length,
- unsigned int inner_length)
+static struct symbol *
+search_symbol_list (const char *name, int num,
+ struct symbol **syms)
{
- struct using_direct *current;
- struct using_direct *new;
+ int i;
- /* Has it already been added? */
-
- for (current = using_list; current != NULL; current = current->next)
+ /* Maybe we should store a dictionary in here instead. */
+ for (i = 0; i < num; ++i)
{
- if ((strncmp (current->inner, name, inner_length) == 0)
- && (strlen (current->inner) == inner_length)
- && (strlen (current->outer) == outer_length))
- return;
+ if (strcmp (name, syms[i]->natural_name ()) == 0)
+ return syms[i];
}
-
- using_list = cp_add_using (name, inner_length, outer_length,
- using_list);
+ return NULL;
}
-/* Record the namespace that the function defined by SYMBOL was
- defined in, if necessary. BLOCK is the associated block; use
- OBSTACK for allocation. */
+/* Like cp_lookup_symbol_via_imports, but if BLOCK is a function, it
+ searches through the template parameters of the function and the
+ function's type. */
-void
-cp_set_block_scope (const struct symbol *symbol,
- struct block *block,
- struct obstack *obstack)
+struct block_symbol
+cp_lookup_symbol_imports_or_template (const char *scope,
+ const char *name,
+ const struct block *block,
+ const domain_enum domain)
{
- /* Make sure that the name was originally mangled: if not, there
- certainly isn't any namespace information to worry about! */
+ struct symbol *function = BLOCK_FUNCTION (block);
+ struct block_symbol result;
- if (SYMBOL_CPLUS_DEMANGLED_NAME (symbol) != NULL)
+ if (symbol_lookup_debug)
{
- if (processing_has_namespace_info)
- {
- block_set_scope
- (block, obsavestring (processing_current_prefix,
- strlen (processing_current_prefix),
- obstack),
- obstack);
- }
- else
+ fprintf_unfiltered (gdb_stdlog,
+ "cp_lookup_symbol_imports_or_template"
+ " (%s, %s, %s, %s)\n",
+ scope, name, host_address_to_string (block),
+ domain_name (domain));
+ }
+
+ if (function != NULL && function->language () == language_cplus)
+ {
+ /* Search the function's template parameters. */
+ if (SYMBOL_IS_CPLUS_TEMPLATE_FUNCTION (function))
{
- /* Try to figure out the appropriate namespace from the
- demangled name. */
+ struct template_symbol *templ
+ = (struct template_symbol *) function;
+ struct symbol *sym = search_symbol_list (name,
+ templ->n_template_arguments,
+ templ->template_arguments);
- /* FIXME: carlton/2003-04-15: If the function in question is
- a method of a class, the name will actually include the
- name of the class as well. This should be harmless, but
- is a little unfortunate. */
+ if (sym != NULL)
+ {
+ if (symbol_lookup_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "cp_lookup_symbol_imports_or_template"
+ " (...) = %s\n",
+ host_address_to_string (sym));
+ }
+ return (struct block_symbol) {sym, block};
+ }
+ }
- const char *name = SYMBOL_CPLUS_DEMANGLED_NAME (symbol);
- unsigned int prefix_len = cp_entire_prefix_len (name);
+ /* Search the template parameters of the function's defining
+ context. */
+ if (function->natural_name ())
+ {
+ struct type *context;
+ std::string name_copy (function->natural_name ());
+ const struct language_defn *lang = language_def (language_cplus);
+ const struct block *parent = BLOCK_SUPERBLOCK (block);
+ struct symbol *sym;
- block_set_scope (block,
- obsavestring (name, prefix_len, obstack),
- obstack);
+ while (1)
+ {
+ unsigned int prefix_len
+ = cp_entire_prefix_len (name_copy.c_str ());
+
+ if (prefix_len == 0)
+ context = NULL;
+ else
+ {
+ name_copy.erase (prefix_len);
+ context = lookup_typename (lang,
+ name_copy.c_str (),
+ parent, 1);
+ }
+
+ if (context == NULL)
+ break;
+
+ sym
+ = search_symbol_list (name,
+ TYPE_N_TEMPLATE_ARGUMENTS (context),
+ TYPE_TEMPLATE_ARGUMENTS (context));
+ if (sym != NULL)
+ {
+ if (symbol_lookup_debug)
+ {
+ fprintf_unfiltered
+ (gdb_stdlog,
+ "cp_lookup_symbol_imports_or_template (...) = %s\n",
+ host_address_to_string (sym));
+ }
+ return (struct block_symbol) {sym, parent};
+ }
+ }
}
}
-}
-/* Test whether or not NAMESPACE looks like it mentions an anonymous
- namespace; return nonzero if so. */
-
-int
-cp_is_anonymous (const char *namespace)
-{
- return (strstr (namespace, "(anonymous namespace)")
- != NULL);
+ result = cp_lookup_symbol_via_imports (scope, name, block, domain, 0, 1, 1);
+ if (symbol_lookup_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "cp_lookup_symbol_imports_or_template (...) = %s\n",
+ result.symbol != NULL
+ ? host_address_to_string (result.symbol) : "NULL");
+ }
+ return result;
}
-/* Create a new struct using direct whose inner namespace is the
- initial substring of NAME of leng INNER_LEN and whose outer
- namespace is the initial substring of NAME of length OUTER_LENGTH.
- Set its next member in the linked list to NEXT; allocate all memory
- using xmalloc. It copies the strings, so NAME can be a temporary
- string. */
-
-static struct using_direct *
-cp_add_using (const char *name,
- unsigned int inner_len,
- unsigned int outer_len,
- struct using_direct *next)
+/* Search for NAME by applying relevant import statements belonging to BLOCK
+ and its parents. SCOPE is the namespace scope of the context in which the
+ search is being evaluated. */
+
+static struct block_symbol
+cp_lookup_symbol_via_all_imports (const char *scope, const char *name,
+ const struct block *block,
+ const domain_enum domain)
{
- struct using_direct *retval;
+ struct block_symbol sym;
- gdb_assert (outer_len < inner_len);
+ while (block != NULL)
+ {
+ sym = cp_lookup_symbol_via_imports (scope, name, block, domain, 0, 0, 1);
+ if (sym.symbol)
+ return sym;
- retval = xmalloc (sizeof (struct using_direct));
- retval->inner = savestring (name, inner_len);
- retval->outer = savestring (name, outer_len);
- retval->next = next;
+ block = BLOCK_SUPERBLOCK (block);
+ }
- return retval;
+ return {};
}
-/* Make a copy of the using directives in the list pointed to by
- USING, using OBSTACK to allocate memory. Free all memory pointed
- to by USING via xfree. */
+/* Searches for NAME in the current namespace, and by applying
+ relevant import statements belonging to BLOCK and its parents.
+ SCOPE is the namespace scope of the context in which the search is
+ being evaluated. */
-static struct using_direct *
-cp_copy_usings (struct using_direct *using,
- struct obstack *obstack)
+struct block_symbol
+cp_lookup_symbol_namespace (const char *scope,
+ const char *name,
+ const struct block *block,
+ const domain_enum domain)
{
- if (using == NULL)
+ struct block_symbol sym;
+
+ if (symbol_lookup_debug)
{
- return NULL;
+ fprintf_unfiltered (gdb_stdlog,
+ "cp_lookup_symbol_namespace (%s, %s, %s, %s)\n",
+ scope, name, host_address_to_string (block),
+ domain_name (domain));
}
- else
+
+ /* First, try to find the symbol in the given namespace. */
+ sym = cp_lookup_symbol_in_namespace (scope, name, block, domain, 1);
+
+ /* Search for name in namespaces imported to this and parent blocks. */
+ if (sym.symbol == NULL)
+ sym = cp_lookup_symbol_via_all_imports (scope, name, block, domain);
+
+ if (symbol_lookup_debug)
{
- struct using_direct *retval
- = obstack_alloc (obstack, sizeof (struct using_direct));
- retval->inner = obsavestring (using->inner, strlen (using->inner),
- obstack);
- retval->outer = obsavestring (using->outer, strlen (using->outer),
- obstack);
- retval->next = cp_copy_usings (using->next, obstack);
-
- xfree (using->inner);
- xfree (using->outer);
- xfree (using);
-
- return retval;
+ fprintf_unfiltered (gdb_stdlog,
+ "cp_lookup_symbol_namespace (...) = %s\n",
+ sym.symbol != NULL
+ ? host_address_to_string (sym.symbol) : "NULL");
}
-}
-
-/* The C++-specific version of name lookup for static and global
- names. This makes sure that names get looked for in all namespaces
- that are in scope. NAME is the natural name of the symbol that
- we're looking for, LINKAGE_NAME (which is optional) is its linkage
- name, BLOCK is the block that we're searching within, DOMAIN says
- what kind of symbols we're looking for, and if SYMTAB is non-NULL,
- we should store the symtab where we found the symbol in it. */
-
-struct symbol *
-cp_lookup_symbol_nonlocal (const char *name,
- const char *linkage_name,
- const struct block *block,
- const domain_enum domain,
- struct symtab **symtab)
-{
- return lookup_namespace_scope (name, linkage_name, block, domain,
- symtab, block_scope (block), 0);
+ return sym;
}
/* Lookup NAME at namespace scope (or, in C terms, in static and
"A::x", and if that call fails, then the first call looks for
"x". */
-static struct symbol *
-lookup_namespace_scope (const char *name,
- const char *linkage_name,
+static struct block_symbol
+lookup_namespace_scope (const struct language_defn *langdef,
+ const char *name,
const struct block *block,
const domain_enum domain,
- struct symtab **symtab,
const char *scope,
int scope_len)
{
- char *namespace;
+ char *the_namespace;
if (scope[scope_len] != '\0')
{
/* Recursively search for names in child namespaces first. */
- struct symbol *sym;
+ struct block_symbol sym;
int new_scope_len = scope_len;
/* If the current scope is followed by "::", skip past that. */
new_scope_len += 2;
}
new_scope_len += cp_find_first_component (scope + new_scope_len);
- sym = lookup_namespace_scope (name, linkage_name, block,
- domain, symtab,
+ sym = lookup_namespace_scope (langdef, name, block, domain,
scope, new_scope_len);
- if (sym != NULL)
+ if (sym.symbol != NULL)
return sym;
}
/* Okay, we didn't find a match in our children, so look for the
- name in the current namespace. */
-
- namespace = alloca (scope_len + 1);
- strncpy (namespace, scope, scope_len);
- namespace[scope_len] = '\0';
- return cp_lookup_symbol_namespace (namespace, name, linkage_name,
- block, domain, symtab);
+ name in the current namespace.
+
+ If we there is no scope and we know we have a bare symbol, then short
+ circuit everything and call cp_lookup_bare_symbol directly.
+ This isn't an optimization, rather it allows us to pass LANGDEF which
+ is needed for primitive type lookup. The test doesn't have to be
+ perfect: if NAME is a bare symbol that our test doesn't catch (e.g., a
+ template symbol with "::" in the argument list) then
+ cp_lookup_symbol_in_namespace will catch it. */
+
+ if (scope_len == 0 && strchr (name, ':') == NULL)
+ return cp_lookup_bare_symbol (langdef, name, block, domain, 1);
+
+ the_namespace = (char *) alloca (scope_len + 1);
+ strncpy (the_namespace, scope, scope_len);
+ the_namespace[scope_len] = '\0';
+ return cp_lookup_symbol_in_namespace (the_namespace, name,
+ block, domain, 1);
}
-/* Look up NAME in the C++ namespace NAMESPACE, applying the using
- directives that are active in BLOCK. Other arguments are as in
- cp_lookup_symbol_nonlocal. */
-
-struct symbol *
-cp_lookup_symbol_namespace (const char *namespace,
- const char *name,
- const char *linkage_name,
- const struct block *block,
- const domain_enum domain,
- struct symtab **symtab)
-{
- const struct using_direct *current;
- struct symbol *sym;
+/* The C++-specific version of name lookup for static and global
+ names. This makes sure that names get looked for in all namespaces
+ that are in scope. NAME is the natural name of the symbol that
+ we're looking for, BLOCK is the block that we're searching within,
+ DOMAIN says what kind of symbols we're looking for. */
- /* First, go through the using directives. If any of them add new
- names to the namespace we're searching in, see if we can find a
- match by applying them. */
+struct block_symbol
+cp_lookup_symbol_nonlocal (const struct language_defn *langdef,
+ const char *name,
+ const struct block *block,
+ const domain_enum domain)
+{
+ struct block_symbol sym;
+ const char *scope = block_scope (block);
- for (current = block_using (block);
- current != NULL;
- current = current->next)
+ if (symbol_lookup_debug)
{
- if (strcmp (namespace, current->outer) == 0)
- {
- sym = cp_lookup_symbol_namespace (current->inner,
- name,
- linkage_name,
- block,
- domain,
- symtab);
- if (sym != NULL)
- return sym;
- }
+ fprintf_unfiltered (gdb_stdlog,
+ "cp_lookup_symbol_non_local"
+ " (%s, %s (scope %s), %s)\n",
+ name, host_address_to_string (block), scope,
+ domain_name (domain));
}
- /* We didn't find anything by applying any of the using directives
- that are still applicable; so let's see if we've got a match
- using the current namespace. */
-
- if (namespace[0] == '\0')
+ /* First, try to find the symbol in the given namespace, and all
+ containing namespaces. */
+ sym = lookup_namespace_scope (langdef, name, block, domain, scope, 0);
+
+ /* Search for name in namespaces imported to this and parent blocks. */
+ if (sym.symbol == NULL)
+ sym = cp_lookup_symbol_via_all_imports (scope, name, block, domain);
+
+ if (symbol_lookup_debug)
{
- return lookup_symbol_file (name, linkage_name, block,
- domain, symtab, 0);
+ fprintf_unfiltered (gdb_stdlog,
+ "cp_lookup_symbol_nonlocal (...) = %s\n",
+ (sym.symbol != NULL
+ ? host_address_to_string (sym.symbol)
+ : "NULL"));
}
- else
+ return sym;
+}
+
+/* Search through the base classes of PARENT_TYPE for a base class
+ named NAME and return its type. If not found, return NULL. */
+
+struct type *
+cp_find_type_baseclass_by_name (struct type *parent_type, const char *name)
+{
+ int i;
+
+ parent_type = check_typedef (parent_type);
+ for (i = 0; i < TYPE_N_BASECLASSES (parent_type); ++i)
{
- char *concatenated_name
- = alloca (strlen (namespace) + 2 + strlen (name) + 1);
- strcpy (concatenated_name, namespace);
- strcat (concatenated_name, "::");
- strcat (concatenated_name, name);
- sym = lookup_symbol_file (concatenated_name, linkage_name,
- block, domain, symtab,
- cp_is_anonymous (namespace));
- return sym;
+ struct type *type = check_typedef (TYPE_BASECLASS (parent_type, i));
+ const char *base_name = TYPE_BASECLASS_NAME (parent_type, i);
+
+ if (base_name == NULL)
+ continue;
+
+ if (streq (base_name, name))
+ return type;
+
+ type = cp_find_type_baseclass_by_name (type, name);
+ if (type != NULL)
+ return type;
}
+
+ return NULL;
}
-/* Look up NAME in BLOCK's static block and in global blocks. If
- ANONYMOUS_NAMESPACE is nonzero, the symbol in question is located
- within an anonymous namespace. Other arguments are as in
- cp_lookup_symbol_nonlocal. */
+/* Search through the base classes of PARENT_TYPE for a symbol named
+ NAME in block BLOCK. */
-static struct symbol *
-lookup_symbol_file (const char *name,
- const char *linkage_name,
- const struct block *block,
- const domain_enum domain,
- struct symtab **symtab,
- int anonymous_namespace)
+static struct block_symbol
+find_symbol_in_baseclass (struct type *parent_type, const char *name,
+ const struct block *block, const domain_enum domain,
+ int is_in_anonymous)
{
- struct symbol *sym = NULL;
+ int i;
+ struct block_symbol sym = {};
- sym = lookup_symbol_static (name, linkage_name, block, domain, symtab);
- if (sym != NULL)
- return sym;
-
- if (anonymous_namespace)
+ for (i = 0; i < TYPE_N_BASECLASSES (parent_type); ++i)
{
- /* Symbols defined in anonymous namespaces have external linkage
- but should be treated as local to a single file nonetheless.
- So we only search the current file's global block. */
+ struct type *base_type = TYPE_BASECLASS (parent_type, i);
+ const char *base_name = TYPE_BASECLASS_NAME (parent_type, i);
- const struct block *global_block = block_global_block (block);
-
- if (global_block != NULL)
- sym = lookup_symbol_aux_block (name, linkage_name, global_block,
- domain, symtab);
+ if (base_name == NULL)
+ continue;
+
+ std::string concatenated_name = std::string (base_name) + "::" + name;
+
+ sym = cp_lookup_nested_symbol_1 (base_type, name,
+ concatenated_name.c_str (),
+ block, domain, 1, is_in_anonymous);
+ if (sym.symbol != NULL)
+ break;
}
- else
+
+ return sym;
+}
+
+/* Helper function to look up NESTED_NAME in CONTAINER_TYPE and in DOMAIN
+ and within the context of BLOCK.
+ NESTED_NAME may have scope ("::").
+ CONTAINER_TYPE needn't have been "check_typedef'd" yet.
+ CONCATENATED_NAME is the fully scoped spelling of NESTED_NAME, it is
+ passed as an argument so that callers can control how space for it is
+ allocated.
+ If BASIC_LOOKUP is non-zero then perform a basic lookup of
+ CONCATENATED_NAME. See cp_basic_lookup_symbol for details.
+ If IS_IN_ANONYMOUS is non-zero then CONCATENATED_NAME is in an anonymous
+ namespace. */
+
+static struct block_symbol
+cp_lookup_nested_symbol_1 (struct type *container_type,
+ const char *nested_name,
+ const char *concatenated_name,
+ const struct block *block,
+ const domain_enum domain,
+ int basic_lookup, int is_in_anonymous)
+{
+ struct block_symbol sym;
+
+ /* NOTE: carlton/2003-11-10: We don't treat C++ class members
+ of classes like, say, data or function members. Instead,
+ they're just represented by symbols whose names are
+ qualified by the name of the surrounding class. This is
+ just like members of namespaces; in particular,
+ cp_basic_lookup_symbol works when looking them up. */
+
+ if (basic_lookup)
{
- sym = lookup_symbol_global (name, linkage_name, domain, symtab);
+ sym = cp_basic_lookup_symbol (concatenated_name, block, domain,
+ is_in_anonymous);
+ if (sym.symbol != NULL)
+ return sym;
}
- if (sym != NULL)
- return sym;
+ /* Now search all static file-level symbols. We have to do this for things
+ like typedefs in the class. We do not try to guess any imported
+ namespace as even the fully specified namespace search is already not
+ C++ compliant and more assumptions could make it too magic. */
- /* Now call "lookup_possible_namespace_symbol". Symbols in here
- claim to be associated to namespaces, but this claim might be
- incorrect: the names in question might actually correspond to
- classes instead of namespaces. But if they correspond to
- classes, then we should have found a match for them above. So if
- we find them now, they should be genuine. */
+ /* First search in this symtab, what we want is possibly there. */
+ sym = lookup_symbol_in_static_block (concatenated_name, block, domain);
+ if (sym.symbol != NULL)
+ return sym;
- /* FIXME: carlton/2003-06-12: This is a hack and should eventually
- be deleted: see comments below. */
+ /* Nope. We now have to search all static blocks in all objfiles,
+ even if block != NULL, because there's no guarantees as to which
+ symtab the symbol we want is in. Except for symbols defined in
+ anonymous namespaces should be treated as local to a single file,
+ which we just searched. */
+ if (!is_in_anonymous)
+ {
+ sym = lookup_static_symbol (concatenated_name, domain);
+ if (sym.symbol != NULL)
+ return sym;
+ }
- if (domain == VAR_DOMAIN)
+ /* If this is a class with baseclasses, search them next. */
+ container_type = check_typedef (container_type);
+ if (TYPE_N_BASECLASSES (container_type) > 0)
{
- sym = lookup_possible_namespace_symbol (name, symtab);
- if (sym != NULL)
+ sym = find_symbol_in_baseclass (container_type, nested_name, block,
+ domain, is_in_anonymous);
+ if (sym.symbol != NULL)
return sym;
}
- return NULL;
+ return {};
}
-/* Look up a type named NESTED_NAME that is nested inside the C++
+/* Look up a symbol named NESTED_NAME that is nested inside the C++
class or namespace given by PARENT_TYPE, from within the context
- given by BLOCK. Return NULL if there is no such nested type. */
-
-struct type *
-cp_lookup_nested_type (struct type *parent_type,
- const char *nested_name,
- const struct block *block)
+ given by BLOCK, and in DOMAIN.
+ Return NULL if there is no such nested symbol. */
+
+struct block_symbol
+cp_lookup_nested_symbol (struct type *parent_type,
+ const char *nested_name,
+ const struct block *block,
+ const domain_enum domain)
{
+ /* type_name_or_error provides better error reporting using the
+ original type. */
+ struct type *saved_parent_type = parent_type;
+
+ parent_type = check_typedef (parent_type);
+
+ if (symbol_lookup_debug)
+ {
+ const char *type_name = TYPE_NAME (saved_parent_type);
+
+ fprintf_unfiltered (gdb_stdlog,
+ "cp_lookup_nested_symbol (%s, %s, %s, %s)\n",
+ type_name != NULL ? type_name : "unnamed",
+ nested_name, host_address_to_string (block),
+ domain_name (domain));
+ }
+
switch (TYPE_CODE (parent_type))
{
case TYPE_CODE_STRUCT:
case TYPE_CODE_NAMESPACE:
+ case TYPE_CODE_UNION:
+ case TYPE_CODE_ENUM:
+ /* NOTE: Handle modules here as well, because Fortran is re-using the C++
+ specific code to lookup nested symbols in modules, by calling the
+ function pointer la_lookup_symbol_nonlocal, which ends up here. */
+ case TYPE_CODE_MODULE:
{
- /* NOTE: carlton/2003-11-10: We don't treat C++ class members
- of classes like, say, data or function members. Instead,
- they're just represented by symbols whose names are
- qualified by the name of the surrounding class. This is
- just like members of namespaces; in particular,
- lookup_symbol_namespace works when looking them up. */
-
- const char *parent_name = TYPE_TAG_NAME (parent_type);
- struct symbol *sym = cp_lookup_symbol_namespace (parent_name,
- nested_name,
- NULL,
- block,
- VAR_DOMAIN,
- NULL);
- if (sym == NULL || SYMBOL_CLASS (sym) != LOC_TYPEDEF)
- return NULL;
- else
- return SYMBOL_TYPE (sym);
+ int size;
+ const char *parent_name = type_name_or_error (saved_parent_type);
+ struct block_symbol sym;
+ char *concatenated_name;
+ int is_in_anonymous;
+
+ size = strlen (parent_name) + 2 + strlen (nested_name) + 1;
+ concatenated_name = (char *) alloca (size);
+ xsnprintf (concatenated_name, size, "%s::%s",
+ parent_name, nested_name);
+ is_in_anonymous = cp_is_in_anonymous (concatenated_name);
+
+ sym = cp_lookup_nested_symbol_1 (parent_type, nested_name,
+ concatenated_name, block, domain,
+ 1, is_in_anonymous);
+
+ if (symbol_lookup_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "cp_lookup_nested_symbol (...) = %s\n",
+ (sym.symbol != NULL
+ ? host_address_to_string (sym.symbol)
+ : "NULL"));
+ }
+ return sym;
}
+
+ case TYPE_CODE_FUNC:
+ case TYPE_CODE_METHOD:
+ if (symbol_lookup_debug)
+ {
+ fprintf_unfiltered (gdb_stdlog,
+ "cp_lookup_nested_symbol (...) = NULL"
+ " (func/method)\n");
+ }
+ return {};
+
default:
internal_error (__FILE__, __LINE__,
- _("cp_lookup_nested_type called on a non-aggregate type."));
+ _("cp_lookup_nested_symbol called "
+ "on a non-aggregate type."));
}
}
/* FIXME: carlton/2004-01-16: The problem that this is trying to
address is that, unfortunately, sometimes NAME is wrong: it may not
include the name of namespaces enclosing the type in question.
- lookup_transparent_type gets called when the the type in question
+ lookup_transparent_type gets called when the type in question
is a declaration, and we're trying to find its definition; but, for
declarations, our type name deduction mechanism doesn't work.
There's nothing we can do to fix this in general, I think, in the
return cp_lookup_transparent_type_loop (name, scope, 0);
}
-/* Lookup the the type definition associated to NAME in
- namespaces/classes containing SCOPE whose name is strictly longer
- than LENGTH. LENGTH must be the index of the start of a
- component of SCOPE. */
+/* Lookup the type definition associated to NAME in namespaces/classes
+ containing SCOPE whose name is strictly longer than LENGTH. LENGTH
+ must be the index of the start of a component of SCOPE. */
static struct type *
-cp_lookup_transparent_type_loop (const char *name, const char *scope,
+cp_lookup_transparent_type_loop (const char *name,
+ const char *scope,
int length)
{
int scope_length = length + cp_find_first_component (scope + length);
if (scope[scope_length] == ':')
{
struct type *retval
- = cp_lookup_transparent_type_loop (name, scope, scope_length + 2);
+ = cp_lookup_transparent_type_loop (name, scope,
+ scope_length + 2);
+
if (retval != NULL)
return retval;
}
- full_name = alloca (scope_length + 2 + strlen (name) + 1);
+ full_name = (char *) alloca (scope_length + 2 + strlen (name) + 1);
strncpy (full_name, scope, scope_length);
- strncpy (full_name + scope_length, "::", 2);
+ memcpy (full_name + scope_length, "::", 2);
strcpy (full_name + scope_length + 2, name);
return basic_lookup_transparent_type (full_name);
}
-/* Now come functions for dealing with symbols associated to
- namespaces. (They're used to store the namespaces themselves, not
- objects that live in the namespaces.) These symbols come in two
- varieties: if we run into a DW_TAG_namespace DIE, then we know that
- we have a namespace, so dwarf2read.c creates a symbol for it just
- like normal. But, unfortunately, versions of GCC through at least
- 3.3 don't generate those DIE's. Our solution is to try to guess
- their existence by looking at demangled names. This might cause us
- to misidentify classes as namespaces, however. So we put those
- symbols in a special block (one per objfile), and we only search
- that block as a last resort. */
-
-/* FIXME: carlton/2003-06-12: Once versions of GCC that generate
- DW_TAG_namespace have been out for a year or two, we should get rid
- of all of this "possible namespace" nonsense. */
-
-/* Allocate everything necessary for the possible namespace block
- associated to OBJFILE. */
-
-static void
-initialize_namespace_symtab (struct objfile *objfile)
-{
- struct symtab *namespace_symtab;
- struct blockvector *bv;
- struct block *bl;
-
- namespace_symtab = allocate_symtab ("<<C++-namespaces>>", objfile);
- namespace_symtab->language = language_cplus;
- namespace_symtab->free_code = free_nothing;
- namespace_symtab->dirname = NULL;
-
- bv = obstack_alloc (&objfile->objfile_obstack,
- sizeof (struct blockvector)
- + FIRST_LOCAL_BLOCK * sizeof (struct block *));
- BLOCKVECTOR_NBLOCKS (bv) = FIRST_LOCAL_BLOCK + 1;
- BLOCKVECTOR (namespace_symtab) = bv;
-
- /* Allocate empty GLOBAL_BLOCK and STATIC_BLOCK. */
-
- bl = allocate_block (&objfile->objfile_obstack);
- BLOCK_DICT (bl) = dict_create_linear (&objfile->objfile_obstack,
- NULL);
- BLOCKVECTOR_BLOCK (bv, GLOBAL_BLOCK) = bl;
- bl = allocate_block (&objfile->objfile_obstack);
- BLOCK_DICT (bl) = dict_create_linear (&objfile->objfile_obstack,
- NULL);
- BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK) = bl;
-
- /* Allocate the possible namespace block; we put it where the first
- local block will live, though I don't think there's any need to
- pretend that it's actually a local block (e.g. by setting
- BLOCK_SUPERBLOCK appropriately). We don't use the global or
- static block because we don't want it searched during the normal
- search of all global/static blocks in lookup_symbol: we only want
- it used as a last resort. */
-
- /* NOTE: carlton/2003-09-11: I considered not associating the fake
- symbols to a block/symtab at all. But that would cause problems
- with lookup_symbol's SYMTAB argument and with block_found, so
- having a symtab/block for this purpose seems like the best
- solution for now. */
-
- bl = allocate_block (&objfile->objfile_obstack);
- BLOCK_DICT (bl) = dict_create_hashed_expandable ();
- BLOCKVECTOR_BLOCK (bv, FIRST_LOCAL_BLOCK) = bl;
-
- namespace_symtab->free_func = free_namespace_block;
-
- objfile->cp_namespace_symtab = namespace_symtab;
-}
-
-/* Locate the possible namespace block associated to OBJFILE,
- allocating it if necessary. */
-
-static struct block *
-get_possible_namespace_block (struct objfile *objfile)
-{
- if (objfile->cp_namespace_symtab == NULL)
- initialize_namespace_symtab (objfile);
-
- return BLOCKVECTOR_BLOCK (BLOCKVECTOR (objfile->cp_namespace_symtab),
- FIRST_LOCAL_BLOCK);
-}
-
-/* Free the dictionary associated to the possible namespace block. */
-
-static void
-free_namespace_block (struct symtab *symtab)
-{
- struct block *possible_namespace_block;
-
- possible_namespace_block = BLOCKVECTOR_BLOCK (BLOCKVECTOR (symtab),
- FIRST_LOCAL_BLOCK);
- gdb_assert (possible_namespace_block != NULL);
- dict_free (BLOCK_DICT (possible_namespace_block));
-}
-
-/* Ensure that there are symbols in the possible namespace block
- associated to OBJFILE for all initial substrings of NAME that look
- like namespaces or classes. NAME should end in a member variable:
- it shouldn't consist solely of namespaces. */
-
-void
-cp_check_possible_namespace_symbols (const char *name, struct objfile *objfile)
-{
- check_possible_namespace_symbols_loop (name,
- cp_find_first_component (name),
- objfile);
-}
-
-/* This is a helper loop for cp_check_possible_namespace_symbols; it
- ensures that there are symbols in the possible namespace block
- associated to OBJFILE for all namespaces that are initial
- substrings of NAME of length at least LEN. It returns 1 if a
- previous loop had already created the shortest such symbol and 0
- otherwise.
-
- This function assumes that if there is already a symbol associated
- to a substring of NAME of a given length, then there are already
- symbols associated to all substrings of NAME whose length is less
- than that length. So if cp_check_possible_namespace_symbols has
- been called once with argument "A::B::C::member", then that will
- create symbols "A", "A::B", and "A::B::C". If it is then later
- called with argument "A::B::D::member", then the new call will
- generate a new symbol for "A::B::D", but once it sees that "A::B"
- has already been created, it doesn't bother checking to see if "A"
- has also been created. */
-
-static int
-check_possible_namespace_symbols_loop (const char *name, int len,
- struct objfile *objfile)
-{
- if (name[len] == ':')
- {
- int done;
- int next_len = len + 2;
-
- next_len += cp_find_first_component (name + next_len);
- done = check_possible_namespace_symbols_loop (name, next_len,
- objfile);
-
- if (!done)
- done = check_one_possible_namespace_symbol (name, len, objfile);
-
- return done;
- }
- else
- return 0;
-}
-
-/* Check to see if there's already a possible namespace symbol in
- OBJFILE whose name is the initial substring of NAME of length LEN.
- If not, create one and return 0; otherwise, return 1. */
-
-static int
-check_one_possible_namespace_symbol (const char *name, int len,
- struct objfile *objfile)
-{
- struct block *block = get_possible_namespace_block (objfile);
- char *name_copy = alloca (len + 1);
- struct symbol *sym;
-
- memcpy (name_copy, name, len);
- name_copy[len] = '\0';
- sym = lookup_block_symbol (block, name_copy, NULL, VAR_DOMAIN);
-
- if (sym == NULL)
- {
- struct type *type;
- name_copy = obsavestring (name, len, &objfile->objfile_obstack);
-
- type = init_type (TYPE_CODE_NAMESPACE, 0, 0, name_copy, objfile);
-
- TYPE_TAG_NAME (type) = TYPE_NAME (type);
-
- sym = obstack_alloc (&objfile->objfile_obstack, sizeof (struct symbol));
- memset (sym, 0, sizeof (struct symbol));
- SYMBOL_LANGUAGE (sym) = language_cplus;
- SYMBOL_SET_NAMES (sym, name_copy, len, objfile);
- SYMBOL_CLASS (sym) = LOC_TYPEDEF;
- SYMBOL_TYPE (sym) = type;
- SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
-
- dict_add_symbol (BLOCK_DICT (block), sym);
-
- return 0;
- }
- else
- return 1;
-}
-
-/* Look for a symbol named NAME in all the possible namespace blocks.
- If one is found, return it; if SYMTAB is non-NULL, set *SYMTAB to
- equal the symtab where it was found. */
-
-static struct symbol *
-lookup_possible_namespace_symbol (const char *name, struct symtab **symtab)
-{
- struct objfile *objfile;
-
- ALL_OBJFILES (objfile)
- {
- struct symbol *sym;
-
- sym = lookup_block_symbol (get_possible_namespace_block (objfile),
- name, NULL, VAR_DOMAIN);
-
- if (sym != NULL)
- {
- if (symtab != NULL)
- *symtab = objfile->cp_namespace_symtab;
-
- return sym;
- }
- }
-
- return NULL;
-}
-
-/* Print out all the possible namespace symbols. */
+/* This used to do something but was removed when it became
+ obsolete. */
static void
-maintenance_cplus_namespace (char *args, int from_tty)
+maintenance_cplus_namespace (const char *args, int from_tty)
{
- struct objfile *objfile;
- printf_unfiltered (_("Possible namespaces:\n"));
- ALL_OBJFILES (objfile)
- {
- struct dict_iterator iter;
- struct symbol *sym;
-
- ALL_BLOCK_SYMBOLS (get_possible_namespace_block (objfile), iter, sym)
- {
- printf_unfiltered ("%s\n", SYMBOL_PRINT_NAME (sym));
- }
- }
+ printf_unfiltered (_("The `maint namespace' command was removed.\n"));
}
void
_initialize_cp_namespace (void)
{
- add_cmd ("namespace", class_maintenance, maintenance_cplus_namespace,
- _("Print the list of possible C++ namespaces."),
- &maint_cplus_cmd_list);
+ struct cmd_list_element *cmd;
+
+ cmd = add_cmd ("namespace", class_maintenance,
+ maintenance_cplus_namespace,
+ _("Deprecated placeholder for removed functionality."),
+ &maint_cplus_cmd_list);
+ deprecate_cmd (cmd, NULL);
}
projects / deliverable / binutils-gdb.git / blobdiff