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cp-namespace.c (cp_lookup_nested_symbol_1): New function.

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gdb/ChangeLog:

	* cp-namespace.c (cp_lookup_nested_symbol_1): New function.
	(cp_basic_lookup_symbol): Renamed from lookup_symbol_file.  Delete
	arg "search".  All callers updated.
	(cp_lookup_bare_symbol): New function.
	(cp_search_static_and_baseclasses): New function.
	(cp_lookup_symbol_in_namespace): Rewrite, move more logic here.
	(find_symbol_in_baseclass): Simplify, call cp_lookup_nested_symbol_1.
	(cp_lookup_nested_symbol): Ditto.
This commit is contained in:
Doug Evans 2014-12-22 09:11:44 -08:00
parent d276311738
commit 6f27419a4d
2 changed files with 222 additions and 146 deletions
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11
gdb/ChangeLog
View File

@ -1,3 +1,14 @@
2014-12-22 Doug Evans <xdje42@gmail.com>
* cp-namespace.c (cp_lookup_nested_symbol_1): New function.
(cp_basic_lookup_symbol): Renamed from lookup_symbol_file. Delete
arg "search". All callers updated.
(cp_lookup_bare_symbol): New function.
(cp_search_static_and_baseclasses): New function.
(cp_lookup_symbol_in_namespace): Rewrite, move more logic here.
(find_symbol_in_baseclass): Simplify, call cp_lookup_nested_symbol_1.
(cp_lookup_nested_symbol): Ditto.
2014-12-22 Doug Evans <xdje42@gmail.com>
* cp-namespace.c (cp_lookup_symbol_in_namespace): Simplify.

357
gdb/cp-namespace.c
View File

@ -32,6 +32,13 @@
#include "buildsym.h"
#include "language.h"
static struct symbol *
cp_lookup_nested_symbol_1 (struct type *container_type,
const char *nested_name,
const char *concatenated_name,
const struct block *block,
int basic_lookup);
static struct type *cp_lookup_transparent_type_loop (const char *name,
const char *scope,
int scope_len);
@ -201,19 +208,15 @@ cp_is_in_anonymous (const char *symbol_name)
!= NULL);
}
/* 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. */
/* Look up NAME in DOMAIN in BLOCK's static block and in global blocks.
If ANONYMOUS_NAMESPACE is nonzero, the symbol in question is located
within an anonymous namespace. */
static struct symbol *
lookup_symbol_file (const char *name,
const struct block *block,
const domain_enum domain,
int anonymous_namespace, int search)
cp_basic_lookup_symbol (const char *name, const struct block *block,
const domain_enum domain, int anonymous_namespace)
{
struct symbol *sym = NULL;
struct symbol *sym;
sym = lookup_symbol_in_static_block (name, block, domain);
if (sym != NULL)
@ -235,90 +238,133 @@ lookup_symbol_file (const char *name,
sym = lookup_global_symbol (name, block, domain);
}
return sym;
}
/* Search bare symbol NAME in DOMAIN in BLOCK.
NAME is guaranteed to not have any scope (no "::").
If SEARCH is non-zero then see if we can determine "this" from BLOCK, and
if so then also search for NAME in that class. */
static struct symbol *
cp_lookup_bare_symbol (const char *name, const struct block *block,
const domain_enum domain, int search)
{
struct symbol *sym;
/* Note: We can't do a simple assert for ':' not being in NAME because
':' may be in the args of a template spec. This isn't intended to be
a complete test, just cheap and documentary. */
if (strchr (name, '<') == NULL && strchr (name, '(') == NULL)
gdb_assert (strchr (name, ':') == NULL);
sym = lookup_symbol_in_static_block (name, block, domain);
if (sym != NULL)
return sym;
sym = lookup_global_symbol (name, block, domain);
if (sym != NULL)
return sym;
if (search)
{
char *klass, *nested;
unsigned int prefix_len;
struct cleanup *cleanup;
struct symbol *klass_sym;
struct symbol *this;
struct type *type;
/* A simple lookup failed. Check if the symbol was defined in
a base class. */
this = lookup_language_this (language_def (language_cplus), block);
if (this == NULL)
return NULL;
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)));
/* If TYPE_NAME is NULL, abandon trying to find this symbol.
This can happen for lambda functions compiled with clang++,
which outputs no name for the container class. */
if (TYPE_NAME (type) == NULL)
return NULL;
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_global_symbol (klass, block, domain);
if (klass_sym == NULL)
{
do_cleanups (cleanup);
return NULL;
}
type = check_typedef (TYPE_TARGET_TYPE (SYMBOL_TYPE (this)));
/* If TYPE_NAME is NULL, abandon trying to find this symbol.
This can happen for lambda functions compiled with clang++,
which outputs no name for the container class. */
if (TYPE_NAME (type) == NULL)
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);
sym = cp_lookup_nested_symbol (type, name, block);
}
return sym;
}
/* 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. */
/* Search NAME in DOMAIN in all static blocks, and then in all baseclasses.
BLOCK specifies the context in which to perform the search.
NAME is guaranteed to have scope (contain "::") and PREFIX_LEN specifies
then length the entire scope of NAME (up to, but not including, the last
"::".
Note: At least in the case of Fortran, which also uses this code, there
may be no text after the last "::". */
static struct symbol *
cp_lookup_symbol_in_namespace (const char *namespace,
const char *name,
const struct block *block,
const domain_enum domain, int search)
cp_search_static_and_baseclasses (const char *name,
const struct block *block,
const domain_enum domain,
unsigned int prefix_len)
{
struct symbol *sym;
char *klass, *nested;
struct cleanup *cleanup;
struct symbol *klass_sym;
struct type *klass_type;
/* The test here uses <= instead of < because Fortran also uses this,
and the module.exp testcase will pass "modmany::" for NAME here. */
gdb_assert (prefix_len + 2 <= strlen (name));
gdb_assert (name[prefix_len + 1] == ':');
/* Find the name of the class and the name of the method, variable, etc. */
/* 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. */
cleanup = 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_global_symbol (klass, block, domain);
if (klass_sym == NULL)
{
do_cleanups (cleanup);
return NULL;
}
klass_type = SYMBOL_TYPE (klass_sym);
/* Look for a symbol named NESTED in this class.
The caller is assumed to have already have done a basic lookup of NAME.
So we pass zero for BASIC_LOOKUP to cp_lookup_nested_symbol_1 here. */
sym = cp_lookup_nested_symbol_1 (klass_type, nested, name, block, 0);
do_cleanups (cleanup);
return sym;
}
/* 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.
Note: Part of the complexity is because NAME may itself specify scope.
Part of the complexity is also because this handles the case where
there is no scoping in which case we also try looking in the class of
"this" if we can compute it. */
static struct symbol *
cp_lookup_symbol_in_namespace (const char *namespace, const char *name,
const struct block *block,
const domain_enum domain, int search)
{
char *concatenated_name = NULL;
int is_anonymous = namespace[0] != '\0' && cp_is_in_anonymous (namespace);
int is_in_anonymous;
unsigned int prefix_len;
struct symbol *sym;
if (namespace[0] != '\0')
{
@ -330,7 +376,24 @@ cp_lookup_symbol_in_namespace (const char *namespace,
name = concatenated_name;
}
return lookup_symbol_file (name, block, domain, is_anonymous, search);
prefix_len = cp_entire_prefix_len (name);
if (prefix_len == 0)
return cp_lookup_bare_symbol (name, block, domain, search);
/* This would be simpler if we just called cp_lookup_nested_symbol
at this point. But that would require first looking up the containing
class/namespace. Since we're only searching static and global blocks
there's often no need to first do that lookup. */
is_in_anonymous = namespace[0] != '\0' && cp_is_in_anonymous (namespace);
sym = cp_basic_lookup_symbol (name, block, domain, is_in_anonymous);
if (sym != NULL)
return sym;
if (search)
sym = cp_search_static_and_baseclasses (name, block, domain, prefix_len);
return sym;
}
/* Used for cleanups to reset the "searched" flag incase
@ -827,44 +890,83 @@ find_symbol_in_baseclass (struct type *parent_type, const char *name,
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_in_static_block (concatenated_name, block,
VAR_DOMAIN);
sym = cp_lookup_nested_symbol_1 (base_type, name, concatenated_name,
block, 1);
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 (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;
}
/* Helper function to look up NESTED_NAME in CONTAINER_TYPE within the
context of BLOCK.
CONTAINER_TYPE needn't have been "check_typedef'd" yet.
CONCATENATED_NAME is the fully scoped spelling of NESTED_NAME, it is
passed as an argument so that callers can control how space for it is
allocated.
If BASIC_LOOKUP is non-zero then perform a basic lookup of
CONCATENATED_NAME. See cp_basic_lookup_symbol for details. */
static struct symbol *
cp_lookup_nested_symbol_1 (struct type *container_type,
const char *nested_name,
const char *concatenated_name,
const struct block *block,
int basic_lookup)
{
int is_in_anonymous = cp_is_in_anonymous (concatenated_name);
struct symbol *sym;
/* 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,
cp_basic_lookup_symbol works when looking them up. */
if (basic_lookup)
{
sym = cp_basic_lookup_symbol (concatenated_name, block, VAR_DOMAIN,
is_in_anonymous);
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. */
/* First search in this symtab, what we want is possibly there. */
sym = lookup_symbol_in_static_block (concatenated_name, block, VAR_DOMAIN);
if (sym != NULL)
return sym;
/* 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 (concatenated_name, VAR_DOMAIN);
if (sym != NULL)
return sym;
/* If this is a class with baseclasses, search them next. */
CHECK_TYPEDEF (container_type);
if (TYPE_N_BASECLASSES (container_type) > 0)
{
sym = find_symbol_in_baseclass (container_type, nested_name, block);
if (sym != NULL)
return sym;
}
return NULL;
}
/* 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 symbol. */
@ -901,56 +1003,19 @@ cp_lookup_nested_symbol (struct type *parent_type,
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,
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);
struct symbol *sym;
char *concatenated_name;
if (sym != NULL)
{
if (symbol_lookup_debug)
{
fprintf_unfiltered (gdb_stdlog,
"cp_lookup_nested_symbol (...) = %s\n",
host_address_to_string (sym));
}
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 (concatenated_name, VAR_DOMAIN);
if (sym != NULL)
{
if (symbol_lookup_debug)
{
fprintf_unfiltered (gdb_stdlog,
"cp_lookup_nested_symbol (...) = %s\n",
host_address_to_string (sym));
}
return sym;
}
parent_name, nested_name);
sym = cp_lookup_nested_symbol_1 (parent_type, nested_name,
concatenated_name, block, 1);
/* If no matching symbols were found, try searching any
base classes. */
sym = find_symbol_in_baseclass (parent_type, nested_name, block);
if (symbol_lookup_debug)
{
fprintf_unfiltered (gdb_stdlog,