69fc87c263
* cp-namespace.c (find_symbol_in_baseclass): Call cp_lookup_symbol_in_namespace instead of cp_lookup_symbol_namespace. Check result of call to lookup_symbol_static. Call lookup_static_symbol_aux unconditionally. Call check_typedef on base types before accessing them. (cp_lookup_nested_symbol): Fix comment. testsuite/ * gdb.cp/derivation2.cc: New file. * gdb.cp/derivation.cc (main): Call foo2. * gdb.cp/derivation.exp: Add tests for typedefs in another file, and when there's an active block.
927 lines
28 KiB
C
927 lines
28 KiB
C
/* Helper routines for C++ support in GDB.
|
|
Copyright (C) 2003-2013 Free Software Foundation, Inc.
|
|
|
|
Contributed by David Carlton and by Kealia, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
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, see <http://www.gnu.org/licenses/>. */
|
|
|
|
#include "defs.h"
|
|
#include "cp-support.h"
|
|
#include "gdb_obstack.h"
|
|
#include "symtab.h"
|
|
#include "symfile.h"
|
|
#include "gdb_assert.h"
|
|
#include "block.h"
|
|
#include "objfiles.h"
|
|
#include "gdbtypes.h"
|
|
#include "dictionary.h"
|
|
#include "command.h"
|
|
#include "frame.h"
|
|
#include "buildsym.h"
|
|
#include "language.h"
|
|
|
|
static struct symbol *lookup_namespace_scope (const char *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 struct block *block,
|
|
const domain_enum domain,
|
|
int anonymous_namespace,
|
|
int search);
|
|
|
|
static struct type *cp_lookup_transparent_type_loop (const char *name,
|
|
const char *scope,
|
|
int scope_len);
|
|
|
|
/* 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 *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;
|
|
|
|
/* Start with a quick-and-dirty check for mention of "(anonymous
|
|
namespace)". */
|
|
|
|
if (!cp_is_anonymous (name))
|
|
return;
|
|
|
|
previous_component = 0;
|
|
next_component = cp_find_first_component (name + previous_component);
|
|
|
|
while (name[next_component] == ':')
|
|
{
|
|
if (((next_component - previous_component)
|
|
== CP_ANONYMOUS_NAMESPACE_LEN)
|
|
&& strncmp (name + previous_component,
|
|
CP_ANONYMOUS_NAMESPACE_STR,
|
|
CP_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 (dest, src, NULL, NULL, NULL, 1,
|
|
&objfile->objfile_obstack);
|
|
}
|
|
/* The "+ 2" is for the "::". */
|
|
previous_component = next_component + 2;
|
|
next_component = (previous_component
|
|
+ cp_find_first_component (name
|
|
+ previous_component));
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* 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,
|
|
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)
|
|
{
|
|
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_alloc (obstack, (sizeof (*new)
|
|
+ (VEC_length (const_char_ptr, excludes)
|
|
* sizeof (*new->excludes))));
|
|
memset (new, 0, sizeof (*new));
|
|
|
|
if (copy_names)
|
|
{
|
|
new->import_src = obstack_copy0 (obstack, src, strlen (src));
|
|
new->import_dest = obstack_copy0 (obstack, dest, strlen (dest));
|
|
}
|
|
else
|
|
{
|
|
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;
|
|
|
|
if (declaration != NULL && copy_names)
|
|
new->declaration = obstack_copy0 (obstack,
|
|
declaration, strlen (declaration));
|
|
else
|
|
new->declaration = declaration;
|
|
|
|
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;
|
|
}
|
|
|
|
/* Test whether or not NAMESPACE looks like it mentions an anonymous
|
|
namespace; return nonzero if so. */
|
|
|
|
int
|
|
cp_is_anonymous (const char *namespace)
|
|
{
|
|
return (strstr (namespace, CP_ANONYMOUS_NAMESPACE_STR)
|
|
!= NULL);
|
|
}
|
|
|
|
/* 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. */
|
|
|
|
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);
|
|
|
|
sym = lookup_namespace_scope (name, block,
|
|
domain, scope, 0);
|
|
if (sym != NULL)
|
|
return sym;
|
|
|
|
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. If SEARCH is non-zero, search
|
|
through base classes for a matching symbol. */
|
|
|
|
static struct symbol *
|
|
cp_lookup_symbol_in_namespace (const char *namespace,
|
|
const char *name,
|
|
const struct block *block,
|
|
const domain_enum domain, int search)
|
|
{
|
|
if (namespace[0] == '\0')
|
|
{
|
|
return lookup_symbol_file (name, block, domain, 0, search);
|
|
}
|
|
else
|
|
{
|
|
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), search);
|
|
}
|
|
}
|
|
|
|
/* 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_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, 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. */
|
|
|
|
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'))
|
|
: 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, 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;
|
|
|
|
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;
|
|
}
|
|
|
|
/* 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 = SYMBOL_SYMTAB (function)->objfile->gdbarch;
|
|
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. */
|
|
|
|
struct symbol*
|
|
cp_lookup_symbol_namespace (const char *scope,
|
|
const char *name,
|
|
const struct block *block,
|
|
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. */
|
|
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
|
|
global variables). SCOPE is the namespace that the current
|
|
function is defined within; only consider namespaces whose length
|
|
is at least SCOPE_LEN. Other arguments are as in
|
|
cp_lookup_symbol_nonlocal.
|
|
|
|
For example, if we're within a function A::B::f and looking for a
|
|
symbol x, this will get called with NAME = "x", SCOPE = "A::B", and
|
|
SCOPE_LEN = 0. It then calls itself with NAME and SCOPE the same,
|
|
but with SCOPE_LEN = 1. And then it calls itself with NAME and
|
|
SCOPE the same, but with SCOPE_LEN = 4. This third call looks for
|
|
"A::B::x"; if it doesn't find it, then the second call looks for
|
|
"A::x", and if that call fails, then the first call looks for
|
|
"x". */
|
|
|
|
static struct symbol *
|
|
lookup_namespace_scope (const char *name,
|
|
const struct block *block,
|
|
const domain_enum domain,
|
|
const char *scope,
|
|
int scope_len)
|
|
{
|
|
char *namespace;
|
|
|
|
if (scope[scope_len] != '\0')
|
|
{
|
|
/* Recursively search for names in child namespaces first. */
|
|
|
|
struct symbol *sym;
|
|
int new_scope_len = scope_len;
|
|
|
|
/* If the current scope is followed by "::", skip past that. */
|
|
if (new_scope_len != 0)
|
|
{
|
|
gdb_assert (scope[new_scope_len] == ':');
|
|
new_scope_len += 2;
|
|
}
|
|
new_scope_len += cp_find_first_component (scope + new_scope_len);
|
|
sym = lookup_namespace_scope (name, block, domain,
|
|
scope, new_scope_len);
|
|
if (sym != NULL)
|
|
return sym;
|
|
}
|
|
|
|
/* Okay, we didn't find a match in our children, so look for the
|
|
name in the current namespace. */
|
|
|
|
namespace = alloca (scope_len + 1);
|
|
strncpy (namespace, scope, scope_len);
|
|
namespace[scope_len] = '\0';
|
|
return cp_lookup_symbol_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. 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 struct block *block,
|
|
const domain_enum domain,
|
|
int anonymous_namespace, int search)
|
|
{
|
|
struct symbol *sym = NULL;
|
|
|
|
sym = lookup_symbol_static (name, block, domain);
|
|
if (sym != NULL)
|
|
return sym;
|
|
|
|
if (anonymous_namespace)
|
|
{
|
|
/* Symbols defined in anonymous namespaces have external linkage
|
|
but should be treated as local to a single file nonetheless.
|
|
So we only search the current file's global block. */
|
|
|
|
const struct block *global_block = block_global_block (block);
|
|
|
|
if (global_block != NULL)
|
|
sym = lookup_symbol_aux_block (name, global_block, domain);
|
|
}
|
|
else
|
|
{
|
|
sym = lookup_symbol_global (name, block, domain);
|
|
}
|
|
|
|
if (sym != NULL)
|
|
return sym;
|
|
|
|
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);
|
|
|
|
/* 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, domain);
|
|
if (klass_sym == NULL)
|
|
{
|
|
do_cleanups (cleanup);
|
|
return NULL;
|
|
}
|
|
|
|
/* 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 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 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:
|
|
{
|
|
/* 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. */
|
|
|
|
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_symbol 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 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 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);
|
|
}
|
|
|
|
/* This used to do something but was removed when it became
|
|
obsolete. */
|
|
|
|
static void
|
|
maintenance_cplus_namespace (char *args, int from_tty)
|
|
{
|
|
printf_unfiltered (_("The `maint namespace' command was removed.\n"));
|
|
}
|
|
|
|
/* Provide a prototype to silence -Wmissing-prototypes. */
|
|
extern initialize_file_ftype _initialize_cp_namespace;
|
|
|
|
void
|
|
_initialize_cp_namespace (void)
|
|
{
|
|
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);
|
|
}
|