/* Helper routines for C++ support in GDB.
- Copyright 2003 Free Software Foundation, Inc.
+ Copyright (C) 2003-2014 Free Software Foundation, Inc.
- Contributed by David Carlton.
+ Contributed by David Carlton and by Kealia, Inc.
This file is part of GDB.
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., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "cp-support.h"
#include "symfile.h"
#include "gdb_assert.h"
#include "block.h"
-
-/* When set, the file that we're processing seems to have debugging
- info for C++ namespaces, so cp-namespace.c shouldn't try to guess
- namespace info itself. */
-
-unsigned char processing_has_namespace_info;
-
-/* If processing_has_namespace_info is nonzero, this string should
- contain the name of the current namespace. The string is
- temporary; copy it if you need it. */
-
-const char *processing_current_namespace;
-
-/* List of using directives that are active in the current file. */
-
-static struct using_direct *using_list;
-
-static struct using_direct *cp_add_using (const char *name,
- unsigned int inner_len,
- unsigned int outer_len,
- struct using_direct *next);
-
-static struct using_direct *cp_copy_usings (struct using_direct *using,
- struct obstack *obstack);
-
-/* Set up support for dealing with C++ namespace info in the current
- symtab. */
-
-void cp_initialize_namespace ()
-{
- processing_has_namespace_info = 0;
- using_list = NULL;
-}
-
-/* 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. */
-
-void
-cp_finalize_namespace (struct block *static_block,
- struct obstack *obstack)
-{
- if (using_list != NULL)
- {
- block_set_using (static_block,
- cp_copy_usings (using_list, obstack),
- obstack);
- using_list = NULL;
- }
-}
+#include "objfiles.h"
+#include "gdbtypes.h"
+#include "dictionary.h"
+#include "command.h"
+#include "frame.h"
+#include "buildsym.h"
+#include "language.h"
+
+static struct symbol *lookup_namespace_scope (const char *name,
+ const struct block *block,
+ const domain_enum domain,
+ const char *scope,
+ int scope_len);
+
+static struct symbol *lookup_symbol_file (const char *name,
+ const struct block *block,
+ const domain_enum domain,
+ int anonymous_namespace,
+ int search);
+
+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. */
-/* Optimize away strlen ("(anonymous namespace)"). */
-
-#define ANONYMOUS_NAMESPACE_LEN 21
-
void
-cp_scan_for_anonymous_namespaces (const struct symbol *symbol)
+cp_scan_for_anonymous_namespaces (const struct symbol *const symbol,
+ struct objfile *const objfile)
{
- if (!processing_has_namespace_info
- && SYMBOL_CPLUS_DEMANGLED_NAME (symbol) != NULL)
+ if (SYMBOL_DEMANGLED_NAME (symbol) != NULL)
{
- const char *name = SYMBOL_CPLUS_DEMANGLED_NAME (symbol);
+ const char *name = SYMBOL_DEMANGLED_NAME (symbol);
unsigned int previous_component;
unsigned int next_component;
- const char *len;
/* Start with a quick-and-dirty check for mention of "(anonymous
namespace)". */
while (name[next_component] == ':')
{
- if ((next_component - previous_component) == ANONYMOUS_NAMESPACE_LEN
+ if (((next_component - previous_component)
+ == CP_ANONYMOUS_NAMESPACE_LEN)
&& strncmp (name + previous_component,
- "(anonymous namespace)",
- ANONYMOUS_NAMESPACE_LEN) == 0)
+ 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 = alloca (dest_len + 1);
+ char *src = 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. */
- cp_add_using_directive (name,
- previous_component == 0
- ? 0 : previous_component - 2,
- next_component);
+ cp_add_using_directive (dest, src, NULL, NULL, NULL, 1,
+ &objfile->objfile_obstack);
}
/* The "+ 2" is for the "::". */
previous_component = next_component + 2;
}
}
-/* 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. */
+
+/* Add a using directive to using_directives. If the using directive
+ in question has already been added, don't add it twice.
+
+ Create a new struct using_direct which imports the namespace SRC
+ into the scope DEST. ALIAS is the name of the imported namespace
+ in the current scope. If ALIAS is NULL then the namespace is known
+ by its original name. DECLARATION is the name if the imported
+ varable if this is a declaration import (Eg. using A::x), otherwise
+ it is NULL. EXCLUDES is a list of names not to import from an
+ imported module or NULL. If COPY_NAMES is non-zero, then the
+ arguments are copied into newly allocated memory so they can be
+ temporaries. For EXCLUDES the VEC pointers are copied but the
+ pointed to characters are not copied. */
void
-cp_add_using_directive (const char *name, unsigned int outer_length,
- unsigned int inner_length)
+cp_add_using_directive (const char *dest,
+ const char *src,
+ const char *alias,
+ const char *declaration,
+ VEC (const_char_ptr) *excludes,
+ int copy_names,
+ struct obstack *obstack)
{
struct using_direct *current;
struct using_direct *new;
-
+
/* Has it already been added? */
- for (current = using_list; current != NULL; current = current->next)
+ for (current = using_directives; current != NULL; current = current->next)
{
- if ((strncmp (current->inner, name, inner_length) == 0)
- && (strlen (current->inner) == inner_length)
- && (strlen (current->outer) == outer_length))
- return;
+ int ix;
+ const char *param;
+
+ if (strcmp (current->import_src, src) != 0)
+ continue;
+ if (strcmp (current->import_dest, dest) != 0)
+ continue;
+ if ((alias == NULL && current->alias != NULL)
+ || (alias != NULL && current->alias == NULL)
+ || (alias != NULL && current->alias != NULL
+ && strcmp (alias, current->alias) != 0))
+ continue;
+ if ((declaration == NULL && current->declaration != NULL)
+ || (declaration != NULL && current->declaration == NULL)
+ || (declaration != NULL && current->declaration != NULL
+ && strcmp (declaration, current->declaration) != 0))
+ continue;
+
+ /* Compare the contents of EXCLUDES. */
+ for (ix = 0; VEC_iterate (const_char_ptr, excludes, ix, param); ix++)
+ if (current->excludes[ix] == NULL
+ || strcmp (param, current->excludes[ix]) != 0)
+ break;
+ if (ix < VEC_length (const_char_ptr, excludes)
+ || current->excludes[ix] != NULL)
+ continue;
+
+ /* Parameters exactly match CURRENT. */
+ return;
+ }
+
+ new = obstack_alloc (obstack, (sizeof (*new)
+ + (VEC_length (const_char_ptr, excludes)
+ * sizeof (*new->excludes))));
+ memset (new, 0, sizeof (*new));
+
+ if (copy_names)
+ {
+ new->import_src = obstack_copy0 (obstack, src, strlen (src));
+ new->import_dest = obstack_copy0 (obstack, dest, strlen (dest));
}
+ else
+ {
+ new->import_src = src;
+ new->import_dest = dest;
+ }
+
+ if (alias != NULL && copy_names)
+ new->alias = obstack_copy0 (obstack, alias, strlen (alias));
+ else
+ new->alias = alias;
+
+ if (declaration != NULL && copy_names)
+ new->declaration = obstack_copy0 (obstack,
+ declaration, strlen (declaration));
+ else
+ new->declaration = declaration;
+
+ memcpy (new->excludes, VEC_address (const_char_ptr, excludes),
+ VEC_length (const_char_ptr, excludes) * sizeof (*new->excludes));
+ new->excludes[VEC_length (const_char_ptr, excludes)] = NULL;
- using_list = cp_add_using (name, inner_length, outer_length,
- using_list);
+ new->next = using_directives;
+ using_directives = new;
}
-/* Record the namespace that the function defined by SYMBOL was
- defined in, if necessary. BLOCK is the associated block; use
- OBSTACK for allocation. */
+/* Test whether or not NAMESPACE looks like it mentions an anonymous
+ namespace; return nonzero if so. */
-void
-cp_set_block_scope (const struct symbol *symbol,
- struct block *block,
- struct obstack *obstack)
+int
+cp_is_anonymous (const char *namespace)
+{
+ return (strstr (namespace, CP_ANONYMOUS_NAMESPACE_STR)
+ != 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, 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.
+
+ Class, union, and enum tag names may be used in C++ without specifying
+ class-key or enum. If searching for a VAR_DOMAIN symbol fails,
+ this function will search STRUCT_DOMAIN. [This is actually done in
+ cp_lookup_symbol_in_namespace.] */
+
+struct symbol *
+cp_lookup_symbol_nonlocal (const char *name,
+ const struct block *block,
+ const domain_enum domain)
+{
+ struct symbol *sym;
+ const char *scope = block_scope (block);
+
+ sym = lookup_namespace_scope (name, block,
+ domain, scope, 0);
+ if (sym != NULL)
+ return sym;
+
+ return cp_lookup_symbol_namespace (scope, name,
+ block, domain);
+}
+
+/* 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.
+
+ If DOMAIN is VAR_DOMAIN and no matching symbol exists in that domain,
+ this function will search STRUCT_DOMAIN for a match. */
+
+static struct symbol *
+cp_lookup_symbol_in_namespace (const char *namespace,
+ const char *name,
+ const struct block *block,
+ const domain_enum domain, int search)
+{
+ if (namespace[0] == '\0')
+ {
+ struct symbol *sym = lookup_symbol_file (name, block, domain, 0, search);
+
+ if (sym == NULL && domain == VAR_DOMAIN)
+ sym = lookup_symbol_file (name, block, STRUCT_DOMAIN, 0, search);
+
+ return sym;
+ }
+ else
+ {
+ struct symbol *sym;
+ 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, block, domain,
+ cp_is_anonymous (namespace), search);
+
+ if (sym == NULL && domain == VAR_DOMAIN)
+ sym = lookup_symbol_file (concatenated_name, block, STRUCT_DOMAIN,
+ cp_is_anonymous (namespace), search);
+
+ return sym;
+ }
+}
+
+/* Used for cleanups to reset the "searched" flag incase
+ of an error. */
+
+static void
+reset_directive_searched (void *data)
{
- /* Make sure that the name was originally mangled: if not, there
- certainly isn't any namespace information to worry about! */
+ struct using_direct *direct = data;
+ direct->searched = 0;
+}
- if (SYMBOL_CPLUS_DEMANGLED_NAME (symbol) != NULL)
+/* 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. */
+
+struct symbol *
+cp_lookup_symbol_imports (const char *scope,
+ const char *name,
+ const struct block *block,
+ const domain_enum domain,
+ const int declaration_only,
+ const int search_parents)
+{
+ struct using_direct *current;
+ struct symbol *sym = NULL;
+ int len;
+ int directive_match;
+ struct cleanup *searched_cleanup;
+
+ /* First, try to find the symbol in the given namespace. */
+ if (!declaration_only)
+ sym = cp_lookup_symbol_in_namespace (scope, name,
+ block, domain, 1);
+
+ if (sym != NULL)
+ return sym;
+
+ /* 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. */
+
+ for (current = block_using (block);
+ current != NULL;
+ current = current->next)
{
- if (processing_has_namespace_info)
+ const char **excludep;
+
+ len = strlen (current->import_dest);
+ directive_match = (search_parents
+ ? (strncmp (scope, current->import_dest,
+ strlen (current->import_dest)) == 0
+ && (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)
{
- block_set_scope
- (block, obsavestring (processing_current_namespace,
- strlen (processing_current_namespace),
- obstack),
- obstack);
+ /* Mark this import as searched so that the recursive call
+ does not search it again. */
+ current->searched = 1;
+ searched_cleanup = make_cleanup (reset_directive_searched,
+ current);
+
+ /* 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 != NULL || current->declaration)
+ {
+ current->searched = 0;
+ discard_cleanups (searched_cleanup);
+
+ if (sym != NULL)
+ return sym;
+
+ continue;
+ }
+
+ /* Do not follow CURRENT if NAME matches its EXCLUDES. */
+ for (excludep = current->excludes; *excludep; excludep++)
+ if (strcmp (name, *excludep) == 0)
+ break;
+ if (*excludep)
+ {
+ discard_cleanups (searched_cleanup);
+ 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_imports (current->import_src,
+ name, block,
+ domain, 0, 0);
+ }
+ current->searched = 0;
+ discard_cleanups (searched_cleanup);
+
+ if (sym != NULL)
+ return sym;
}
- else
- {
- /* Try to figure out the appropriate namespace from the
- demangled name. */
+ }
+
+ return NULL;
+}
+
+/* Helper function that searches an array of symbols for one named
+ NAME. */
+
+static struct symbol *
+search_symbol_list (const char *name, int num,
+ struct symbol **syms)
+{
+ int i;
- /* 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. */
+ /* Maybe we should store a dictionary in here instead. */
+ for (i = 0; i < num; ++i)
+ {
+ if (strcmp (name, SYMBOL_NATURAL_NAME (syms[i])) == 0)
+ return syms[i];
+ }
+ return NULL;
+}
- const char *name = SYMBOL_CPLUS_DEMANGLED_NAME (symbol);
- unsigned int prefix_len = cp_entire_prefix_len (name);
+/* Like cp_lookup_symbol_imports, but if BLOCK is a function, it
+ searches through the template parameters of the function and the
+ function's type. */
- block_set_scope (block,
- obsavestring (name, prefix_len, obstack),
- obstack);
+struct symbol *
+cp_lookup_symbol_imports_or_template (const char *scope,
+ const char *name,
+ const struct block *block,
+ const domain_enum domain)
+{
+ struct symbol *function = BLOCK_FUNCTION (block);
+
+ if (function != NULL && SYMBOL_LANGUAGE (function) == language_cplus)
+ {
+ /* Search the function's template parameters. */
+ if (SYMBOL_IS_CPLUS_TEMPLATE_FUNCTION (function))
+ {
+ struct template_symbol *templ
+ = (struct template_symbol *) function;
+ struct symbol *result;
+
+ result = search_symbol_list (name,
+ templ->n_template_arguments,
+ templ->template_arguments);
+ if (result != NULL)
+ return result;
+ }
+
+ /* Search the template parameters of the function's defining
+ context. */
+ if (SYMBOL_NATURAL_NAME (function))
+ {
+ struct type *context;
+ char *name_copy = xstrdup (SYMBOL_NATURAL_NAME (function));
+ struct cleanup *cleanups = make_cleanup (xfree, name_copy);
+ const struct language_defn *lang = language_def (language_cplus);
+ struct gdbarch *arch
+ = get_objfile_arch (SYMBOL_SYMTAB (function)->objfile);
+ const struct block *parent = BLOCK_SUPERBLOCK (block);
+
+ while (1)
+ {
+ struct symbol *result;
+ unsigned int prefix_len = cp_entire_prefix_len (name_copy);
+
+ if (prefix_len == 0)
+ context = NULL;
+ else
+ {
+ name_copy[prefix_len] = '\0';
+ context = lookup_typename (lang, arch,
+ name_copy,
+ parent, 1);
+ }
+
+ if (context == NULL)
+ break;
+
+ result
+ = search_symbol_list (name,
+ TYPE_N_TEMPLATE_ARGUMENTS (context),
+ TYPE_TEMPLATE_ARGUMENTS (context));
+ if (result != NULL)
+ {
+ do_cleanups (cleanups);
+ return result;
+ }
+ }
+
+ do_cleanups (cleanups);
}
}
+
+ return cp_lookup_symbol_imports (scope, name, block, domain, 1, 1);
}
-/* Test whether or not NAMESPACE looks like it mentions an anonymous
- namespace; return nonzero if so. */
+ /* 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.
+
+ Class, union, and enum tag names may be used in C++ without specifying
+ class-key or enum. If searching for a VAR_DOMAIN symbol fails,
+ this function will search STRUCT_DOMAIN. [This is done in
+ cp_lookup_symbol_in_namespace.] */
+
+struct symbol*
+cp_lookup_symbol_namespace (const char *scope,
+ const char *name,
+ const struct block *block,
+ const domain_enum domain)
+{
+ struct symbol *sym;
+
+ /* First, try to find the symbol in the given namespace. */
+ sym = cp_lookup_symbol_in_namespace (scope, name,
+ block, domain, 1);
+ if (sym != NULL)
+ return sym;
+
+ /* Search for name in namespaces imported to this and parent
+ blocks. */
+ while (block != NULL)
+ {
+ sym = cp_lookup_symbol_imports (scope, name, block,
+ domain, 0, 1);
-int
-cp_is_anonymous (const char *namespace)
+ if (sym)
+ return sym;
+
+ block = BLOCK_SUPERBLOCK (block);
+ }
+
+ return NULL;
+}
+
+/* Lookup NAME at namespace scope (or, in C terms, in static and
+ global variables). SCOPE is the namespace that the current
+ function is defined within; only consider namespaces whose length
+ is at least SCOPE_LEN. Other arguments are as in
+ cp_lookup_symbol_nonlocal.
+
+ For example, if we're within a function A::B::f and looking for a
+ symbol x, this will get called with NAME = "x", SCOPE = "A::B", and
+ SCOPE_LEN = 0. It then calls itself with NAME and SCOPE the same,
+ but with SCOPE_LEN = 1. And then it calls itself with NAME and
+ SCOPE the same, but with SCOPE_LEN = 4. This third call looks for
+ "A::B::x"; if it doesn't find it, then the second call looks for
+ "A::x", and if that call fails, then the first call looks for
+ "x". */
+
+static struct symbol *
+lookup_namespace_scope (const char *name,
+ const struct block *block,
+ const domain_enum domain,
+ const char *scope,
+ int scope_len)
{
- return (strstr (namespace, "(anonymous namespace)")
- != NULL);
+ char *namespace;
+
+ if (scope[scope_len] != '\0')
+ {
+ /* Recursively search for names in child namespaces first. */
+
+ struct symbol *sym;
+ int new_scope_len = scope_len;
+
+ /* If the current scope is followed by "::", skip past that. */
+ if (new_scope_len != 0)
+ {
+ gdb_assert (scope[new_scope_len] == ':');
+ new_scope_len += 2;
+ }
+ new_scope_len += cp_find_first_component (scope + new_scope_len);
+ sym = lookup_namespace_scope (name, block, domain,
+ scope, new_scope_len);
+ if (sym != 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_in_namespace (namespace, name,
+ block, domain, 1);
}
-/* 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)
+/* 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. If SEARCH is non-zero, search through
+ base classes for a matching symbol. Other arguments are as in
+ cp_lookup_symbol_nonlocal. */
+
+static struct symbol *
+lookup_symbol_file (const char *name,
+ const struct block *block,
+ const domain_enum domain,
+ int anonymous_namespace, int search)
{
- struct using_direct *retval;
+ struct symbol *sym = NULL;
- gdb_assert (outer_len < inner_len);
+ sym = lookup_symbol_static (name, block, domain);
+ if (sym != NULL)
+ return sym;
- retval = xmalloc (sizeof (struct using_direct));
- retval->inner = savestring (name, inner_len);
- retval->outer = savestring (name, outer_len);
- retval->next = next;
+ if (anonymous_namespace)
+ {
+ /* 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. */
+
+ const struct block *global_block = block_global_block (block);
+
+ if (global_block != NULL)
+ sym = lookup_symbol_aux_block (name, global_block, domain);
+ }
+ else
+ {
+ sym = lookup_symbol_global (name, block, domain);
+ }
+
+ if (sym != NULL)
+ return sym;
+
+ if (search)
+ {
+ char *klass, *nested;
+ unsigned int prefix_len;
+ struct cleanup *cleanup;
+ struct symbol *klass_sym;
+
+ /* A simple lookup failed. Check if the symbol was defined in
+ a base class. */
+
+ cleanup = make_cleanup (null_cleanup, NULL);
+
+ /* Find the name of the class and the name of the method,
+ variable, etc. */
+ prefix_len = cp_entire_prefix_len (name);
+
+ /* If no prefix was found, search "this". */
+ if (prefix_len == 0)
+ {
+ struct type *type;
+ struct symbol *this;
+
+ this = lookup_language_this (language_def (language_cplus), block);
+ if (this == NULL)
+ {
+ do_cleanups (cleanup);
+ return NULL;
+ }
+
+ type = check_typedef (TYPE_TARGET_TYPE (SYMBOL_TYPE (this)));
+ klass = xstrdup (TYPE_NAME (type));
+ nested = xstrdup (name);
+ }
+ else
+ {
+ /* The class name is everything up to and including PREFIX_LEN. */
+ klass = savestring (name, prefix_len);
+
+ /* The rest of the name is everything else past the initial scope
+ operator. */
+ nested = xstrdup (name + prefix_len + 2);
+ }
+
+ /* Add cleanups to free memory for these strings. */
+ make_cleanup (xfree, klass);
+ make_cleanup (xfree, nested);
+
+ /* Lookup a class named KLASS. If none is found, there is nothing
+ more that can be done. */
+ klass_sym = lookup_symbol_global (klass, block, STRUCT_DOMAIN);
+ if (klass_sym == NULL)
+ {
+ do_cleanups (cleanup);
+ return NULL;
+ }
- return retval;
+ /* Look for a symbol named NESTED in this class. */
+ sym = cp_lookup_nested_symbol (SYMBOL_TYPE (klass_sym), nested, block);
+ do_cleanups (cleanup);
+ }
+
+ 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 *
+find_type_baseclass_by_name (struct type *parent_type, const char *name)
+{
+ int i;
+
+ CHECK_TYPEDEF (parent_type);
+ for (i = 0; i < TYPE_N_BASECLASSES (parent_type); ++i)
+ {
+ 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 = find_type_baseclass_by_name (type, name);
+ if (type != NULL)
+ return type;
+ }
+
+ return NULL;
}
-/* 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. */
+/* Search through the base classes of PARENT_TYPE for a symbol named
+ NAME in block BLOCK. */
-static struct using_direct *
-cp_copy_usings (struct using_direct *using,
- struct obstack *obstack)
+static struct symbol *
+find_symbol_in_baseclass (struct type *parent_type, const char *name,
+ const struct block *block)
{
- if (using == NULL)
+ int i;
+ struct symbol *sym;
+ struct cleanup *cleanup;
+ char *concatenated_name;
+
+ sym = NULL;
+ concatenated_name = NULL;
+ cleanup = make_cleanup (free_current_contents, &concatenated_name);
+ for (i = 0; i < TYPE_N_BASECLASSES (parent_type); ++i)
{
+ size_t len;
+ struct type *base_type = TYPE_BASECLASS (parent_type, i);
+ const char *base_name = TYPE_BASECLASS_NAME (parent_type, i);
+
+ if (base_name == NULL)
+ continue;
+
+ /* Search this particular base class. */
+ sym = cp_lookup_symbol_in_namespace (base_name, name, block,
+ VAR_DOMAIN, 0);
+ if (sym != NULL)
+ break;
+
+ /* Now search all static file-level symbols. We have to do this for
+ things like typedefs in the class. First search in this symtab,
+ what we want is possibly there. */
+ len = strlen (base_name) + 2 + strlen (name) + 1;
+ concatenated_name = xrealloc (concatenated_name, len);
+ xsnprintf (concatenated_name, len, "%s::%s", base_name, name);
+ sym = lookup_symbol_static (concatenated_name, block, VAR_DOMAIN);
+ if (sym != NULL)
+ break;
+
+ /* 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. */
+ sym = lookup_static_symbol_aux (concatenated_name, VAR_DOMAIN);
+ if (sym != NULL)
+ break;
+
+ /* If this class has base classes, search them next. */
+ CHECK_TYPEDEF (base_type);
+ if (TYPE_N_BASECLASSES (base_type) > 0)
+ {
+ sym = find_symbol_in_baseclass (base_type, name, block);
+ if (sym != NULL)
+ break;
+ }
+ }
+
+ do_cleanups (cleanup);
+ return sym;
+}
+
+/* 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 symbol *
+cp_lookup_nested_symbol (struct type *parent_type,
+ const char *nested_name,
+ const struct block *block)
+{
+ /* type_name_no_tag_required provides better error reporting using the
+ original type. */
+ struct type *saved_parent_type = parent_type;
+
+ CHECK_TYPEDEF (parent_type);
+
+ 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. */
+
+ int size;
+ const char *parent_name = type_name_no_tag_or_error (saved_parent_type);
+ struct symbol *sym
+ = cp_lookup_symbol_in_namespace (parent_name, nested_name,
+ block, VAR_DOMAIN, 0);
+ char *concatenated_name;
+
+ 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. */
+
+ size = strlen (parent_name) + 2 + strlen (nested_name) + 1;
+ concatenated_name = alloca (size);
+ xsnprintf (concatenated_name, size, "%s::%s",
+ parent_name, nested_name);
+ sym = lookup_static_symbol_aux (concatenated_name, VAR_DOMAIN);
+ if (sym != NULL)
+ return sym;
+
+ /* If no matching symbols were found, try searching any
+ base classes. */
+ return find_symbol_in_baseclass (parent_type, nested_name, block);
+ }
+
+ case TYPE_CODE_FUNC:
+ case TYPE_CODE_METHOD:
return NULL;
+
+ default:
+ internal_error (__FILE__, __LINE__,
+ _("cp_lookup_nested_symbol called "
+ "on a non-aggregate type."));
}
- else
+}
+
+/* The C++-version of lookup_transparent_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 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
+ absence of debug information about namespaces (I've filed PR
+ gdb/1511 about this); until such debug information becomes more
+ prevalent, one heuristic which sometimes looks is to search for the
+ definition in namespaces containing the current namespace.
+
+ We should delete this functions once the appropriate debug
+ information becomes more widespread. (GCC 3.4 will be the first
+ released version of GCC with such information.) */
+
+struct type *
+cp_lookup_transparent_type (const char *name)
+{
+ /* First, try the honest way of looking up the definition. */
+ struct type *t = basic_lookup_transparent_type (name);
+ const char *scope;
+
+ if (t != NULL)
+ return t;
+
+ /* If that doesn't work and we're within a namespace, look there
+ instead. */
+ scope = block_scope (get_selected_block (0));
+
+ if (scope[0] == '\0')
+ return NULL;
+
+ return cp_lookup_transparent_type_loop (name, scope, 0);
+}
+
+/* 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,
+ int length)
+{
+ int scope_length = length + cp_find_first_component (scope + length);
+ char *full_name;
+
+ /* If the current scope is followed by "::", look in the next
+ component. */
+ if (scope[scope_length] == ':')
{
- 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;
+ struct type *retval
+ = cp_lookup_transparent_type_loop (name, scope,
+ scope_length + 2);
+
+ if (retval != NULL)
+ return retval;
}
+
+ full_name = alloca (scope_length + 2 + strlen (name) + 1);
+ strncpy (full_name, scope, scope_length);
+ strncpy (full_name + scope_length, "::", 2);
+ strcpy (full_name + scope_length + 2, name);
+
+ return basic_lookup_transparent_type (full_name);
+}
+
+/* This used to do something but was removed when it became
+ obsolete. */
+
+static void
+maintenance_cplus_namespace (char *args, int from_tty)
+{
+ printf_unfiltered (_("The `maint namespace' command was removed.\n"));
+}
+
+/* Provide a prototype to silence -Wmissing-prototypes. */
+extern initialize_file_ftype _initialize_cp_namespace;
+
+void
+_initialize_cp_namespace (void)
+{
+ 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