/* Helper routines for C++ support in GDB.
- Copyright (C) 2003, 2004, 2007, 2008, 2009, 2010, 2011
- Free Software Foundation, Inc.
+ Copyright (C) 2003-2004, 2007-2012 Free Software Foundation, Inc.
Contributed by David Carlton and by Kealia, Inc.
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)
{
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);
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, NULL,
- &SYMBOL_SYMTAB (symbol)->objfile->objfile_obstack);
+ cp_add_using_directive (dest, src, NULL, NULL, NULL,
+ &objfile->objfile_obstack);
}
/* The "+ 2" is for the "::". */
previous_component = next_component + 2;
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. */
+ it is NULL. EXCLUDES is a list of names not to import from an imported
+ module or NULL. 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,
const char *declaration,
+ VEC (const_char_ptr) *excludes,
struct obstack *obstack)
{
struct using_direct *current;
for (current = using_directives; current != NULL; current = current->next)
{
- 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;
+ 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_ZALLOC (obstack, struct using_direct);
+ new = obstack_alloc (obstack, (sizeof (*new)
+ + (VEC_length (const_char_ptr, excludes)
+ * sizeof (*new->excludes))));
+ memset (new, 0, sizeof (*new));
new->import_src = obsavestring (src, strlen (src), obstack);
new->import_dest = obsavestring (dest, strlen (dest), obstack);
new->declaration = obsavestring (declaration, strlen (declaration),
obstack);
+ 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;
+
new->next = using_directives;
using_directives = new;
}
int
cp_is_anonymous (const char *namespace)
{
- return (strstr (namespace, "(anonymous namespace)")
+ return (strstr (namespace, CP_ANONYMOUS_NAMESPACE_STR)
!= NULL);
}
current != NULL;
current = current->next)
{
+ const char **excludep;
+
len = strlen (current->import_dest);
directive_match = (search_parents
? (strncmp (scope, current->import_dest,
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,
+ /* 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);
- }
- 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;
+
+ /* 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);
+ }
+ 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;
}
}
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. */
-
- /* 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;
+ return sym;
}
/* Look up a type named NESTED_NAME that is nested inside the C++
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:
just like members of namespaces; in particular,
lookup_symbol_namespace works when looking them up. */
- const char *parent_name = TYPE_TAG_NAME (parent_type);
+ 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);
}
default:
internal_error (__FILE__, __LINE__,
- _("cp_lookup_nested_type called on a non-aggregate type."));
+ _("cp_lookup_nested_type 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,
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, 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_SET_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, 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);
}
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