/* Helper routines for C++ support in GDB.
- Copyright (C) 2003, 2004, 2007, 2008, 2009, 2010
- Free Software Foundation, Inc.
+ Copyright (C) 2003-2014 Free Software Foundation, Inc.
Contributed by David Carlton and by Kealia, Inc.
#include "command.h"
#include "frame.h"
#include "buildsym.h"
+#include "language.h"
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);
static struct symbol *lookup_symbol_file (const char *name,
- const char *linkage_name,
const struct block *block,
const domain_enum domain,
- int anonymous_namespace);
+ int anonymous_namespace,
+ int search);
static struct type *cp_lookup_transparent_type_loop (const char *name,
const char *scope,
int scope_len);
-static void initialize_namespace_symtab (struct objfile *objfile);
-
-static struct block *get_possible_namespace_block (struct objfile *objfile);
-
-static void free_namespace_block (struct symtab *symtab);
-
-static int check_possible_namespace_symbols_loop (const char *name,
- int len,
- struct objfile *objfile);
-
-static int check_one_possible_namespace_symbol (const char *name,
- int len,
- struct objfile *objfile);
-
-static struct symbol *lookup_possible_namespace_symbol (const char *name);
-
-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. */
-/* 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 (SYMBOL_DEMANGLED_NAME (symbol) != NULL)
{
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 dest_len = (previous_component == 0
+ ? 0 : previous_component - 2);
int src_len = next_component;
char *dest = alloca (dest_len + 1);
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 (dest, src, NULL);
+ 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. 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 *dest, const char *src, const char *alias)
+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_directives; current != NULL; current = current->next)
{
- if (strcmp (current->import_src, src) == 0
- && strcmp (current->import_dest, dest) == 0)
- 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;
}
- using_directives = cp_add_using (dest, src, alias, using_directives);
+ new = obstack_alloc (obstack, (sizeof (*new)
+ + (VEC_length (const_char_ptr, excludes)
+ * sizeof (*new->excludes))));
+ memset (new, 0, sizeof (*new));
-}
-
-/* Record the namespace that the function defined by SYMBOL was
- defined in, if necessary. BLOCK is the associated block; use
- OBSTACK for allocation. */
-
-void
-cp_set_block_scope (const struct symbol *symbol,
- struct block *block,
- struct obstack *obstack,
- const char *processing_current_prefix,
- int processing_has_namespace_info)
-{
- if (processing_has_namespace_info)
+ if (copy_names)
{
- block_set_scope
- (block, obsavestring (processing_current_prefix,
- strlen (processing_current_prefix),
- obstack),
- obstack);
+ new->import_src = obstack_copy0 (obstack, src, strlen (src));
+ new->import_dest = obstack_copy0 (obstack, dest, strlen (dest));
}
- else if (SYMBOL_DEMANGLED_NAME (symbol) != NULL)
+ else
{
- /* Try to figure out the appropriate namespace from the
- demangled name. */
+ 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;
- /* 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 (declaration != NULL && copy_names)
+ new->declaration = obstack_copy0 (obstack,
+ declaration, strlen (declaration));
+ else
+ new->declaration = declaration;
- const char *name = SYMBOL_DEMANGLED_NAME (symbol);
- unsigned int prefix_len = cp_entire_prefix_len (name);
+ 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;
- block_set_scope (block,
- obsavestring (name, prefix_len, obstack),
- obstack);
- }
+ new->next = using_directives;
+ using_directives = new;
}
/* Test whether or not NAMESPACE looks like it mentions an anonymous
int
cp_is_anonymous (const char *namespace)
{
- return (strstr (namespace, "(anonymous namespace)")
+ return (strstr (namespace, CP_ANONYMOUS_NAMESPACE_STR)
!= NULL);
}
-/* 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.
- 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. */
-
-struct using_direct *
-cp_add_using (const char *dest,
- const char *src,
- const char *alias,
- struct using_direct *next)
-{
- struct using_direct *retval;
-
- retval = xmalloc (sizeof (struct using_direct));
- retval->import_src = savestring (src, strlen(src));
- retval->import_dest = savestring (dest, strlen(dest));
-
- if (alias != NULL)
- retval->alias = savestring (alias, strlen (alias));
- else
- retval->alias = NULL;
-
- retval->next = next;
- retval->searched = 0;
-
- 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. */
+ 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 char *linkage_name,
const struct block *block,
const domain_enum domain)
{
struct symbol *sym;
const char *scope = block_scope (block);
- sym = lookup_namespace_scope (name, linkage_name, block, domain, scope, 0);
+ sym = lookup_namespace_scope (name, block,
+ domain, scope, 0);
if (sym != NULL)
return sym;
- return cp_lookup_symbol_namespace (scope, name, linkage_name, block, domain,
- 1);
+ 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. */
+/* 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 char *linkage_name,
const struct block *block,
- const domain_enum domain)
+ const domain_enum domain, int search)
{
if (namespace[0] == '\0')
{
- return lookup_symbol_file (name, linkage_name, block,
- domain, 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
{
- char *concatenated_name = alloca (strlen (namespace) + 2 +
- strlen (name+ 1));
+ struct symbol *sym;
+ 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, linkage_name,
- block, domain,cp_is_anonymous (namespace));
+ 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;
}
}
direct->searched = 0;
}
-/* Search for NAME by applying all import statements belonging
- to BLOCK which are applicable in SCOPE.
- If SEARCH_PARENTS the search will include imports which are applicable in
- parents of SCOPE.
+/* 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{
+ 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{
+ 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. */
+ 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. */
-static struct symbol *
+struct symbol *
cp_lookup_symbol_imports (const char *scope,
const char *name,
- const char *linkage_name,
const struct block *block,
const domain_enum domain,
+ const int declaration_only,
const int search_parents)
{
struct using_direct *current;
- struct symbol *sym;
+ struct symbol *sym = NULL;
int len;
int directive_match;
struct cleanup *searched_cleanup;
/* First, try to find the symbol in the given namespace. */
- sym = cp_lookup_symbol_in_namespace (scope, name, linkage_name, block,
- domain);
+ 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. */
+ /* 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)
{
+ 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'))
+ || 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 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 (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,
- linkage_name,
- 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,
- linkage_name,
- block,
- domain,
- 0);
- }
- current->searched = 0;
- discard_cleanups (searched_cleanup);
+ /* 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;
+ 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;
}
}
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. */
+/* 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;
+
+ /* 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;
+}
+
+/* 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. */
+
+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);
+}
+
+ /* 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 char *linkage_name,
const struct block *block,
- const domain_enum domain,
- const int search_parents)
+ 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. */
+ /* Search for name in namespaces imported to this and parent
+ blocks. */
while (block != NULL)
{
- sym = cp_lookup_symbol_imports (scope, name, linkage_name, block, domain,
- search_parents);
+ sym = cp_lookup_symbol_imports (scope, name, block,
+ domain, 0, 1);
if (sym)
return sym;
static struct symbol *
lookup_namespace_scope (const char *name,
- const char *linkage_name,
const struct block *block,
const domain_enum domain,
const char *scope,
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);
+ 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_in_namespace (namespace, name, linkage_name,
- block, domain);
+ return cp_lookup_symbol_in_namespace (namespace, name,
+ block, domain, 1);
}
/* 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
+ 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 char *linkage_name,
const struct block *block,
const domain_enum domain,
- int anonymous_namespace)
+ int anonymous_namespace, int search)
{
struct symbol *sym = NULL;
- sym = lookup_symbol_static (name, linkage_name, block, domain);
+ 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);
+ sym = lookup_symbol_aux_block (name, global_block, domain);
}
else
{
- sym = lookup_symbol_global (name, linkage_name, block, domain);
+ sym = lookup_symbol_global (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. */
+ 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);
- /* FIXME: carlton/2003-06-12: This is a hack and should eventually
- be deleted: see comments below. */
+ /* 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;
+ }
- if (domain == VAR_DOMAIN)
+ /* 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)
{
- sym = lookup_possible_namespace_symbol (name);
- if (sym != NULL)
- 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 = find_type_baseclass_by_name (type, name);
+ if (type != NULL)
+ return type;
}
return NULL;
}
-/* Look up a type named NESTED_NAME that is nested inside the C++
+/* Search through the base classes of PARENT_TYPE for a symbol named
+ NAME in block BLOCK. */
+
+static struct symbol *
+find_symbol_in_baseclass (struct type *parent_type, const char *name,
+ const struct block *block)
+{
+ 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 type *
-cp_lookup_nested_type (struct type *parent_type,
- const char *nested_name,
- const struct block *block)
+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,
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_in_namespace (parent_name,
- nested_name,
- NULL,
- block,
- VAR_DOMAIN);
- if (sym == NULL || SYMBOL_CLASS (sym) != LOC_TYPEDEF)
- return NULL;
- else
- return SYMBOL_TYPE (sym);
+ 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_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;
}
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. */
+/* This used to do something but was removed when it became
+ obsolete. */
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));
- }
- }
+ printf_unfiltered (_("The `maint namespace' command was removed.\n"));
}
/* Provide a prototype to silence -Wmissing-prototypes. */
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