/* Helper routines for C++ support in GDB.
- Copyright (C) 2003, 2004, 2007 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2004, 2007, 2008, 2009, 2010
+ 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 "dictionary.h"
#include "command.h"
#include "frame.h"
-
-/* When set, the file that we're processing is known to have debugging
- info for C++ namespaces. */
-
-/* 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. */
-
-unsigned char processing_has_namespace_info;
-
-/* 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:
-
- namespace N {
- class C {
- void foo () {
- }
- };
- }
-
- then processing_current_prefix should be set to "N::C". If
- processing_has_namespace_info is false, then this variable might
- not be reliable. */
-
-const char *processing_current_prefix;
-
-/* 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);
+#include "buildsym.h"
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);
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 type *cp_lookup_transparent_type_loop (const char *name,
int len,
struct objfile *objfile);
-static
-struct symbol *lookup_possible_namespace_symbol (const char *name,
- struct symtab **symtab);
+static struct symbol *lookup_possible_namespace_symbol (const char *name);
static void maintenance_cplus_namespace (char *args, int from_tty);
-/* 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;
- }
-}
-
/* 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;
/* Start with a quick-and-dirty check for mention of "(anonymous
namespace)". */
"(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, NULL, NULL,
+ &SYMBOL_SYMTAB (symbol)->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. The arguments are copied
+ into newly allocated memory so they can be temporaries. */
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,
+ 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))
+ if (strcmp (current->import_src, src) == 0
+ && strcmp (current->import_dest, dest) == 0
+ && ((alias == NULL && current->alias == NULL)
+ || (alias != NULL && current->alias != NULL
+ && strcmp (alias, current->alias) == 0))
+ && ((declaration == NULL && current->declaration == NULL)
+ || (declaration != NULL && current->declaration != NULL
+ && strcmp (declaration, current->declaration) == 0)))
return;
}
- using_list = cp_add_using (name, inner_length, outer_length,
- using_list);
+ new = OBSTACK_ZALLOC (obstack, struct using_direct);
+
+ new->import_src = obsavestring (src, strlen (src), obstack);
+ new->import_dest = obsavestring (dest, strlen (dest), obstack);
+
+ if (alias != NULL)
+ new->alias = obsavestring (alias, strlen (alias), obstack);
+
+ if (declaration != NULL)
+ new->declaration = obsavestring (declaration, strlen (declaration),
+ obstack);
+
+ new->next = using_directives;
+ using_directives = new;
}
/* 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_prefix,
- strlen (processing_current_prefix),
- 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.
- 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)
-{
- struct using_direct *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, 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. */
- gdb_assert (outer_len < inner_len);
+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);
- retval = xmalloc (sizeof (struct using_direct));
- retval->inner = savestring (name, inner_len);
- retval->outer = savestring (name, outer_len);
- retval->next = next;
+ sym = lookup_namespace_scope (name, block, domain, scope, 0);
+ if (sym != NULL)
+ return sym;
- return retval;
+ return cp_lookup_symbol_namespace (scope, name, block, domain);
}
-/* 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. */
+/* Look up NAME in the C++ namespace NAMESPACE. Other arguments are as in
+ cp_lookup_symbol_nonlocal. */
-static struct using_direct *
-cp_copy_usings (struct using_direct *using,
- struct obstack *obstack)
+static struct symbol *
+cp_lookup_symbol_in_namespace (const char *namespace,
+ const char *name,
+ const struct block *block,
+ const domain_enum domain)
{
- if (using == NULL)
+ if (namespace[0] == '\0')
{
- return NULL;
+ return lookup_symbol_file (name, block, domain, 0);
}
else
{
- 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;
+ char *concatenated_name = alloca (strlen (namespace) + 2 +
+ strlen (name) + 1);
+
+ strcpy (concatenated_name, namespace);
+ strcat (concatenated_name, "::");
+ strcat (concatenated_name, name);
+ return lookup_symbol_file (concatenated_name, block,
+ domain, cp_is_anonymous (namespace));
}
}
-/* 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. */
+/* Used for cleanups to reset the "searched" flag incase
+ of an error. */
+
+static void
+reset_directive_searched (void *data)
+{
+ struct using_direct *direct = data;
+ direct->searched = 0;
+}
+
+/* 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_nonlocal (const char *name,
- const char *linkage_name,
- const struct block *block,
- const domain_enum domain,
- struct symtab **symtab)
+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);
+
+ 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)
+ {
+ 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)
+ {
+ /* 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);
+
+ /* 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;
+ }
+
+ 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);
+ }
+ 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;
+ }
+ }
+
+ return NULL;
+}
+
+ /* 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. */
+
+struct symbol*
+cp_lookup_symbol_namespace (const char *scope,
+ const char *name,
+ const struct block *block,
+ const domain_enum domain)
{
- return lookup_namespace_scope (name, linkage_name, block, domain,
- symtab, block_scope (block), 0);
+ struct symbol *sym;
+
+ /* First, try to find the symbol in the given namespace. */
+ sym = cp_lookup_symbol_in_namespace (scope, name, block, domain);
+ 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);
+
+ if (sym)
+ return sym;
+
+ block = BLOCK_SUPERBLOCK (block);
+ }
+
+ return NULL;
}
/* Lookup NAME at namespace scope (or, in C terms, in static and
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)
{
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,
- scope, new_scope_len);
+ sym = lookup_namespace_scope (name, block, domain, scope, new_scope_len);
if (sym != NULL)
return sym;
}
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);
-}
-
-/* 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;
-
- /* 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->outer) == 0)
- {
- sym = cp_lookup_symbol_namespace (current->inner,
- name,
- linkage_name,
- block,
- domain,
- symtab);
- 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, symtab, 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, symtab,
- cp_is_anonymous (namespace));
- return sym;
- }
+ return cp_lookup_symbol_in_namespace (namespace, name, block, domain);
}
/* Look up NAME in BLOCK's static block and in global blocks. If
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)
{
struct symbol *sym = NULL;
- sym = lookup_symbol_static (name, linkage_name, block, domain, symtab);
+ sym = lookup_symbol_static (name, block, domain);
if (sym != NULL)
return sym;
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);
+ sym = lookup_symbol_aux_block (name, global_block, domain);
}
else
{
- sym = lookup_symbol_global (name, linkage_name, block, domain, symtab);
+ sym = lookup_symbol_global (name, block, domain);
}
if (sym != NULL)
if (domain == VAR_DOMAIN)
{
- sym = lookup_possible_namespace_symbol (name, symtab);
+ sym = lookup_possible_namespace_symbol (name);
if (sym != NULL)
return sym;
}
{
case TYPE_CODE_STRUCT:
case TYPE_CODE_NAMESPACE:
+ case TYPE_CODE_UNION:
{
/* NOTE: carlton/2003-11-10: We don't treat C++ class members
of classes like, say, data or function members. Instead,
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);
+ struct symbol *sym = cp_lookup_symbol_in_namespace (parent_name,
+ nested_name,
+ block,
+ VAR_DOMAIN);
+
if (sym == NULL || SYMBOL_CLASS (sym) != LOC_TYPEDEF)
return NULL;
else
{
struct type *retval
= cp_lookup_transparent_type_loop (name, scope, scope_length + 2);
+
if (retval != NULL)
return retval;
}
memcpy (name_copy, name, len);
name_copy[len] = '\0';
- sym = lookup_block_symbol (block, name_copy, NULL, VAR_DOMAIN);
+ sym = lookup_block_symbol (block, name_copy, 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);
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);
+ /* 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;
}
/* 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. */
+ If one is found, return it. */
static struct symbol *
-lookup_possible_namespace_symbol (const char *name, struct symtab **symtab)
+lookup_possible_namespace_symbol (const char *name)
{
struct objfile *objfile;
struct symbol *sym;
sym = lookup_block_symbol (get_possible_namespace_block (objfile),
- name, NULL, VAR_DOMAIN);
+ name, VAR_DOMAIN);
if (sym != NULL)
- {
- if (symtab != NULL)
- *symtab = objfile->cp_namespace_symtab;
-
- return sym;
- }
+ return sym;
}
return NULL;
maintenance_cplus_namespace (char *args, int from_tty)
{
struct objfile *objfile;
+
printf_unfiltered (_("Possible namespaces:\n"));
ALL_OBJFILES (objfile)
{
}
}
+/* Provide a prototype to silence -Wmissing-prototypes. */
+extern initialize_file_ftype _initialize_cp_namespace;
+
void
_initialize_cp_namespace (void)
{
projects / deliverable / binutils-gdb.git / blobdiff