/* Helper routines for C++ support in GDB.
- Copyright 2003 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2004, 2007, 2008, 2009 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"
+#include "objfiles.h"
+#include "gdbtypes.h"
+#include "dictionary.h"
+#include "command.h"
+#include "frame.h"
+#include "buildsym.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. */
+static struct using_direct *cp_copy_usings (struct using_direct *using,
+ struct obstack *obstack);
-unsigned char processing_has_namespace_info;
+static struct symbol *lookup_namespace_scope (const char *name,
+ const char *linkage_name,
+ const struct block *block,
+ const domain_enum domain,
+ const char *scope,
+ int scope_len);
-/* 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. */
+static struct symbol *lookup_symbol_file (const char *name,
+ const char *linkage_name,
+ const struct block *block,
+ const domain_enum domain,
+ int anonymous_namespace);
-const char *processing_current_namespace;
+static struct type *cp_lookup_transparent_type_loop (const char *name,
+ const char *scope,
+ int scope_len);
-/* List of using directives that are active in the current file. */
+static void initialize_namespace_symtab (struct objfile *objfile);
-static struct using_direct *using_list;
+static struct block *get_possible_namespace_block (struct objfile *objfile);
-static struct using_direct *cp_add_using (const char *name,
- unsigned int inner_len,
- unsigned int outer_len,
- struct using_direct *next);
+static void free_namespace_block (struct symtab *symtab);
-static struct using_direct *cp_copy_usings (struct using_direct *using,
- struct obstack *obstack);
+static int check_possible_namespace_symbols_loop (const char *name,
+ int len,
+ struct objfile *objfile);
-/* Set up support for dealing with C++ namespace info in the current
- symtab. */
+static int check_one_possible_namespace_symbol (const char *name,
+ int len,
+ struct objfile *objfile);
-void cp_initialize_namespace ()
-{
- processing_has_namespace_info = 0;
- using_list = NULL;
-}
+static struct symbol *lookup_possible_namespace_symbol (const char *name);
-/* 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;
- }
-}
+static void maintenance_cplus_namespace (char *args, int from_tty);
/* 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 (const struct symbol *symbol)
{
- 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;
"(anonymous namespace)",
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);
}
/* 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_list. If the using directive in question
+ has already been added, don't add it twice. */
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)
{
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))
+ if (strcmp (current->import_src, src) == 0
+ && strcmp (current->import_dest, dest) == 0)
return;
}
- using_list = cp_add_using (name, inner_length, outer_length,
- using_list);
+ using_directives = cp_add_using (dest, src, using_directives);
+
}
/* Record the namespace that the function defined by SYMBOL was
void
cp_set_block_scope (const struct symbol *symbol,
struct block *block,
- struct obstack *obstack)
+ struct obstack *obstack,
+ const char *processing_current_prefix,
+ int processing_has_namespace_info)
{
- /* Make sure that the name was originally mangled: if not, there
- certainly isn't any namespace information to worry about! */
-
- if (SYMBOL_CPLUS_DEMANGLED_NAME (symbol) != NULL)
+ if (processing_has_namespace_info)
{
- if (processing_has_namespace_info)
- {
- block_set_scope
- (block, obsavestring (processing_current_namespace,
- strlen (processing_current_namespace),
- obstack),
- obstack);
- }
- else
- {
- /* Try to figure out the appropriate namespace from the
- demangled name. */
+ block_set_scope
+ (block, obsavestring (processing_current_prefix,
+ strlen (processing_current_prefix),
+ obstack),
+ obstack);
+ }
+ else if (SYMBOL_DEMANGLED_NAME (symbol) != NULL)
+ {
+ /* Try to figure out the appropriate namespace from the
+ demangled name. */
- /* 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. */
+ /* 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. */
- const char *name = SYMBOL_CPLUS_DEMANGLED_NAME (symbol);
- unsigned int prefix_len = cp_entire_prefix_len (name);
+ const char *name = SYMBOL_DEMANGLED_NAME (symbol);
+ unsigned int prefix_len = cp_entire_prefix_len (name);
- block_set_scope (block,
- obsavestring (name, prefix_len, obstack),
- obstack);
- }
+ block_set_scope (block,
+ obsavestring (name, prefix_len, obstack),
+ obstack);
}
}
!= NULL);
}
-/* 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.
+/* Create a new struct using direct which imports the namespace SRC
+ into the scope DEST.
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 *
+cp_add_using (const char *dest,
+ const char *src,
struct using_direct *next)
{
struct using_direct *retval;
- gdb_assert (outer_len < inner_len);
-
retval = xmalloc (sizeof (struct using_direct));
- retval->inner = savestring (name, inner_len);
- retval->outer = savestring (name, outer_len);
+ retval->import_src = savestring (src, strlen(src));
+ retval->import_dest = savestring (dest, strlen(dest));
retval->next = next;
return retval;
{
struct using_direct *retval
= obstack_alloc (obstack, sizeof (struct using_direct));
- retval->inner = obsavestring (using->inner, strlen (using->inner),
+ retval->import_src = obsavestring (using->import_src, strlen (using->import_src),
obstack);
- retval->outer = obsavestring (using->outer, strlen (using->outer),
+ retval->import_dest = obsavestring (using->import_dest, strlen (using->import_dest),
obstack);
retval->next = cp_copy_usings (using->next, obstack);
- xfree (using->inner);
- xfree (using->outer);
+ xfree (using->import_src);
+ xfree (using->import_dest);
xfree (using);
return retval;
}
}
+
+/* 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)
+{
+ return lookup_namespace_scope (name, linkage_name, block, domain,
+ block_scope (block), 0);
+}
+
+/* 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 char *linkage_name,
+ const struct block *block,
+ const domain_enum domain,
+ const char *scope,
+ int scope_len)
+{
+ 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, linkage_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_namespace (namespace, name, linkage_name,
+ block, domain);
+}
+
+/* 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)
+{
+ const struct using_direct *current;
+ struct symbol *sym;
+
+ /* 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. */
+
+ for (current = block_using (block);
+ current != NULL;
+ current = current->next)
+ {
+ if (strcmp (namespace, current->import_dest) == 0)
+ {
+ sym = cp_lookup_symbol_namespace (current->import_src,
+ name,
+ linkage_name,
+ block,
+ domain);
+ if (sym != NULL)
+ return sym;
+ }
+ }
+
+ /* 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')
+ {
+ return lookup_symbol_file (name, linkage_name, block,
+ domain, 0);
+ }
+ else
+ {
+ 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,
+ cp_is_anonymous (namespace));
+ return sym;
+ }
+}
+
+/* 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. */
+
+static struct symbol *
+lookup_symbol_file (const char *name,
+ const char *linkage_name,
+ const struct block *block,
+ const domain_enum domain,
+ int anonymous_namespace)
+{
+ struct symbol *sym = NULL;
+
+ sym = lookup_symbol_static (name, linkage_name, block, domain);
+ if (sym != NULL)
+ return sym;
+
+ 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, linkage_name, global_block,
+ domain);
+ }
+ else
+ {
+ sym = lookup_symbol_global (name, linkage_name, block, domain);
+ }
+
+ if (sym != NULL)
+ return sym;
+
+ /* 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. */
+
+ /* FIXME: carlton/2003-06-12: This is a hack and should eventually
+ be deleted: see comments below. */
+
+ if (domain == VAR_DOMAIN)
+ {
+ sym = lookup_possible_namespace_symbol (name);
+ if (sym != NULL)
+ return sym;
+ }
+
+ return NULL;
+}
+
+/* Look up a type 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)
+{
+ switch (TYPE_CODE (parent_type))
+ {
+ case TYPE_CODE_STRUCT:
+ case TYPE_CODE_NAMESPACE:
+ {
+ /* 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);
+ if (sym == NULL || SYMBOL_CLASS (sym) != LOC_TYPEDEF)
+ return NULL;
+ else
+ return SYMBOL_TYPE (sym);
+ }
+ default:
+ internal_error (__FILE__, __LINE__,
+ _("cp_lookup_nested_type called on a non-aggregate type."));
+ }
+}
+
+/* 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 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 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 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);
+}
+
+/* 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;
+
+ 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;
+ /* Note that init_type copied the name to the objfile's
+ obstack. */
+ SYMBOL_SET_NAMES (sym, TYPE_NAME (type), len, 0, 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. */
+
+static struct symbol *
+lookup_possible_namespace_symbol (const char *name)
+{
+ 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)
+ return sym;
+ }
+
+ return NULL;
+}
+
+/* Print out all the possible namespace symbols. */
+
+static void
+maintenance_cplus_namespace (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));
+ }
+ }
+}
+
+/* Provide a prototype to silence -Wmissing-prototypes. */
+extern initialize_file_ftype _initialize_cp_namespace;
+
+void
+_initialize_cp_namespace (void)
+{
+ add_cmd ("namespace", class_maintenance, maintenance_cplus_namespace,
+ _("Print the list of possible C++ namespaces."),
+ &maint_cplus_cmd_list);
+}
projects / deliverable / binutils-gdb.git / blobdiff