/* 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 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., 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 "gdbtypes.h"
#include "dictionary.h"
#include "command.h"
-
-/* When set, the file that we're processing seems to have debugging
- info for C++ namespaces, so cp-namespace.c shouldn't try to guess
- namespace info itself. */
-
-unsigned char processing_has_namespace_info;
-
-/* If processing_has_namespace_info is nonzero, this string should
- contain the name of the current namespace. The string is
- temporary; copy it if you need it. */
-
-/* FIXME: carlton/2003-06-12: This isn't entirely reliable: currently,
- we get mislead by DW_AT_specification. */
-
-const char *processing_current_namespace;
-
-/* List of using directives that are active in the current file. */
-
-static struct using_direct *using_list;
-
-static struct using_direct *cp_add_using (const char *name,
- unsigned int inner_len,
- unsigned int outer_len,
- struct using_direct *next);
+#include "frame.h"
+#include "buildsym.h"
static struct using_direct *cp_copy_usings (struct using_direct *using,
struct obstack *obstack);
const char *linkage_name,
const struct block *block,
const domain_enum domain,
- struct symtab **symtab,
const char *scope,
int scope_len);
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,
+ const char *scope,
+ int scope_len);
+
static void initialize_namespace_symtab (struct objfile *objfile);
static struct block *get_possible_namespace_block (struct objfile *objfile);
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;
"(anonymous namespace)",
ANONYMOUS_NAMESPACE_LEN) == 0)
{
+ int outer_len = (previous_component == 0 ? 0 : previous_component - 2);
+ int inner_len = next_component;
+
+ char *outer = alloca (outer_len + 1);
+ char *inner = alloca (inner_len + 1);
+
+ memcpy (outer, name, outer_len);
+ memcpy (inner, name, inner_len);
+
+ outer[outer_len] = '\0';
+ inner[inner_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 (outer, inner);
}
/* 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 *outer, const char *inner)
{
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->inner, inner) == 0
+ && strcmp (current->outer, outer) == 0)
return;
}
- using_list = cp_add_using (name, inner_length, outer_length,
- using_list);
+ using_directives = cp_add_using (outer, inner, 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 0
- /* FIXME: carlton/2003-06-12: As mentioned above,
- 'processing_has_namespace_info' currently isn't entirely
- reliable, so let's always use demangled names to get this
- information for now. */
-
- if (processing_has_namespace_info)
- {
- block_set_scope
- (block, obsavestring (processing_current_namespace,
- strlen (processing_current_namespace),
- obstack),
- obstack);
- }
- else
-#endif
- {
- /* 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 whose inner namespace is INNER
+ and whose outer namespace is OUTER.
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 *outer,
+ const char *inner,
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->inner = savestring (inner, strlen(inner));
+ retval->outer = savestring (outer, strlen(outer));
retval->next = next;
return retval;
cp_lookup_symbol_nonlocal (const char *name,
const char *linkage_name,
const struct block *block,
- const domain_enum domain,
- struct symtab **symtab)
+ const domain_enum domain)
{
return lookup_namespace_scope (name, linkage_name, block, domain,
- symtab, block_scope (block), 0);
+ block_scope (block), 0);
}
/* Lookup NAME at namespace scope (or, in C terms, in static and
const char *linkage_name,
const struct block *block,
const domain_enum domain,
- struct symtab **symtab,
const char *scope,
int scope_len)
{
}
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);
+ domain, scope, new_scope_len);
if (sym != NULL)
return sym;
}
strncpy (namespace, scope, scope_len);
namespace[scope_len] = '\0';
return cp_lookup_symbol_namespace (namespace, name, linkage_name,
- block, domain, symtab);
+ block, domain);
}
/* Look up NAME in the C++ namespace NAMESPACE, applying the using
const char *name,
const char *linkage_name,
const struct block *block,
- const domain_enum domain,
- struct symtab **symtab)
+ const domain_enum domain)
{
const struct using_direct *current;
struct symbol *sym;
name,
linkage_name,
block,
- domain,
- symtab);
+ domain);
if (sym != NULL)
return sym;
}
if (namespace[0] == '\0')
{
return lookup_symbol_file (name, linkage_name, block,
- domain, symtab, 0);
+ domain, 0);
}
else
{
strcat (concatenated_name, "::");
strcat (concatenated_name, name);
sym = lookup_symbol_file (concatenated_name, linkage_name,
- block, domain, symtab,
+ block, domain,
cp_is_anonymous (namespace));
return sym;
}
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, linkage_name, block, domain);
if (sym != NULL)
return sym;
if (global_block != NULL)
sym = lookup_symbol_aux_block (name, linkage_name, global_block,
- domain, symtab);
+ domain);
}
else
{
- sym = lookup_symbol_global (name, linkage_name, domain, symtab);
+ sym = lookup_symbol_global (name, linkage_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;
}
class or namespace given by PARENT_TYPE, from within the context
given by BLOCK. Return NULL if there is no such nested type. */
-/* FIXME: carlton/2003-09-24: For now, this only works for nested
- namespaces; the patch to make this work on other sorts of nested
- types is next on my TODO list. */
-
struct type *
cp_lookup_nested_type (struct type *parent_type,
const char *nested_name,
{
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,
- NULL);
+ VAR_DOMAIN);
if (sym == NULL || SYMBOL_CLASS (sym) != LOC_TYPEDEF)
return NULL;
else
}
default:
internal_error (__FILE__, __LINE__,
- "cp_lookup_nested_type called on a non-namespace.");
+ _("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
namespace_symtab->free_code = free_nothing;
namespace_symtab->dirname = NULL;
- bv = obstack_alloc (&objfile->symbol_obstack,
+ bv = obstack_alloc (&objfile->objfile_obstack,
sizeof (struct blockvector)
+ FIRST_LOCAL_BLOCK * sizeof (struct block *));
BLOCKVECTOR_NBLOCKS (bv) = FIRST_LOCAL_BLOCK + 1;
/* Allocate empty GLOBAL_BLOCK and STATIC_BLOCK. */
- bl = allocate_block (&objfile->symbol_obstack);
- BLOCK_DICT (bl) = dict_create_linear (&objfile->symbol_obstack,
+ 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->symbol_obstack);
- BLOCK_DICT (bl) = dict_create_linear (&objfile->symbol_obstack,
+ bl = allocate_block (&objfile->objfile_obstack);
+ BLOCK_DICT (bl) = dict_create_linear (&objfile->objfile_obstack,
NULL);
BLOCKVECTOR_BLOCK (bv, STATIC_BLOCK) = bl;
having a symtab/block for this purpose seems like the best
solution for now. */
- bl = allocate_block (&objfile->symbol_obstack);
+ bl = allocate_block (&objfile->objfile_obstack);
BLOCK_DICT (bl) = dict_create_hashed_expandable ();
BLOCKVECTOR_BLOCK (bv, FIRST_LOCAL_BLOCK) = bl;
struct objfile *objfile)
{
struct block *block = get_possible_namespace_block (objfile);
- char *name_copy = obsavestring (name, len, &objfile->symbol_obstack);
- struct symbol *sym = lookup_block_symbol (block, name_copy, NULL,
- VAR_DOMAIN);
+ 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 = init_type (TYPE_CODE_NAMESPACE, 0, 0,
- name_copy, objfile);
+ struct type *type;
+ name_copy = obsavestring (name, len, &objfile->objfile_obstack);
+
+ type = init_type (TYPE_CODE_NAMESPACE, 0, 0, name_copy, objfile);
+
TYPE_TAG_NAME (type) = TYPE_NAME (type);
- sym = obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol));
+ 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);
return 0;
}
else
- {
- obstack_free (&objfile->symbol_obstack, name_copy);
-
- return 1;
- }
+ return 1;
}
/* 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;
name, NULL, 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");
+ printf_unfiltered (_("Possible namespaces:\n"));
ALL_OBJFILES (objfile)
{
struct dict_iterator iter;
}
}
+/* 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.",
+ _("Print the list of possible C++ namespaces."),
&maint_cplus_cmd_list);
}
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