/* Set during partial symbol reading, to prevent queueing of full
symbols. */
int reading_partial_symbols;
+
+ /* Table mapping type .debug_info DIE offsets to types.
+ This is NULL if not allocated yet.
+ It (currently) makes sense to allocate debug_types_type_hash lazily.
+ To keep things simple we allocate both lazily. */
+ htab_t debug_info_type_hash;
+
+ /* Table mapping type .debug_types DIE offsets to types.
+ This is NULL if not allocated yet. */
+ htab_t debug_types_type_hash;
};
static struct dwarf2_per_objfile *dwarf2_per_objfile;
/* Backchain to our per_cu entry if the tree has been built. */
struct dwarf2_per_cu_data *per_cu;
- /* Pointer to the die -> type map. Although it is stored
- permanently in per_cu, we copy it here to avoid double
- indirection. */
- htab_t type_hash;
-
/* How many compilation units ago was this CU last referenced? */
int last_used;
of the CU cache it gets reset to NULL again. */
struct dwarf2_cu *cu;
- /* If full symbols for this CU have been read in, then this field
- holds a map of DIE offsets to types. It isn't always possible
- to reconstruct this information later, so we have to preserve
- it. */
- htab_t type_hash;
-
/* The corresponding objfile. */
struct objfile *objfile;
static struct type *die_containing_type (struct die_info *,
struct dwarf2_cu *);
-static struct type *tag_type_to_type (struct die_info *, struct dwarf2_cu *);
+static struct type *lookup_die_type (struct die_info *, struct attribute *,
+ struct dwarf2_cu *);
static struct type *read_type_die (struct die_info *, struct dwarf2_cu *);
+static struct type *read_type_die_1 (struct die_info *, struct dwarf2_cu *);
+
static char *determine_prefix (struct die_info *die, struct dwarf2_cu *);
static char *typename_concat (struct obstack *obs, const char *prefix,
static void dwarf2_clear_marks (struct dwarf2_per_cu_data *);
+static struct type *get_die_type_at_offset (unsigned int,
+ struct dwarf2_per_cu_data *per_cu);
+
static struct type *get_die_type (struct die_info *die, struct dwarf2_cu *cu);
static void dwarf2_release_queue (void *dummy);
static void init_cu_die_reader (struct die_reader_specs *reader,
struct dwarf2_cu *cu);
-static htab_t allocate_signatured_type_hash_table (struct objfile *objfile);
+static htab_t allocate_signatured_type_table (struct objfile *objfile);
#if WORDS_BIGENDIAN
}
/* Create the signatured type hash table from the index. */
+
static int
-create_signatured_type_hash_from_index (struct objfile *objfile,
- const gdb_byte *bytes,
- offset_type elements)
+create_signatured_type_table_from_index (struct objfile *objfile,
+ const gdb_byte *bytes,
+ offset_type elements)
{
offset_type i;
- htab_t type_hash;
+ htab_t sig_types_hash;
dwarf2_per_objfile->n_type_comp_units = elements / 3;
dwarf2_per_objfile->type_comp_units
dwarf2_per_objfile->n_type_comp_units
* sizeof (struct dwarf2_per_cu_data *));
- type_hash = allocate_signatured_type_hash_table (objfile);
+ sig_types_hash = allocate_signatured_type_table (objfile);
for (i = 0; i < elements; i += 3)
{
= OBSTACK_ZALLOC (&objfile->objfile_obstack,
struct dwarf2_per_cu_quick_data);
- slot = htab_find_slot (type_hash, type_sig, INSERT);
+ slot = htab_find_slot (sig_types_hash, type_sig, INSERT);
*slot = type_sig;
dwarf2_per_objfile->type_comp_units[i / 3] = &type_sig->per_cu;
}
- dwarf2_per_objfile->signatured_types = type_hash;
+ dwarf2_per_objfile->signatured_types = sig_types_hash;
return 1;
}
if (version == 2
&& types_list_elements
- && !create_signatured_type_hash_from_index (objfile, types_list,
- types_list_elements))
+ && !create_signatured_type_table_from_index (objfile, types_list,
+ types_list_elements))
return 0;
create_addrmap_from_index (objfile, map);
/* Allocate a hash table for signatured types. */
static htab_t
-allocate_signatured_type_hash_table (struct objfile *objfile)
+allocate_signatured_type_table (struct objfile *objfile)
{
return htab_create_alloc_ex (41,
hash_type_signature,
return 0;
}
- types_htab = allocate_signatured_type_hash_table (objfile);
+ types_htab = allocate_signatured_type_table (objfile);
if (dwarf2_die_debug)
fprintf_unfiltered (gdb_stdlog, "Signatured types:\n");
/* Link this compilation unit into the compilation unit tree. */
this_cu->cu = cu;
cu->per_cu = this_cu;
- cu->type_hash = this_cu->type_hash;
/* Link this CU into read_in_chain. */
this_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
/* Link this compilation unit into the compilation unit tree. */
per_cu->cu = cu;
cu->per_cu = per_cu;
- cu->type_hash = per_cu->type_hash;
/* Link this CU into read_in_chain. */
per_cu->cu->read_in_chain = dwarf2_per_objfile->read_in_chain;
attr = dwarf2_attr (child_origin_die, DW_AT_abstract_origin, cu);
if (attr == NULL)
break;
+ /* FIXME: cu becomes CU of child_origin_die.
+ What about the next iteration of the outer loop?
+ cu might then be bogus (won't be CU for child_die). */
child_origin_die = follow_die_ref (child_origin_die, attr, &cu);
}
}
}
-
/* Return the type of the die in question using its DW_AT_type attribute. */
static struct type *
die_type (struct die_info *die, struct dwarf2_cu *cu)
{
struct attribute *type_attr;
- struct die_info *type_die;
type_attr = dwarf2_attr (die, DW_AT_type, cu);
if (!type_attr)
return objfile_type (cu->objfile)->builtin_void;
}
- type_die = follow_die_ref_or_sig (die, type_attr, &cu);
-
- return tag_type_to_type (type_die, cu);
+ return lookup_die_type (die, type_attr, cu);
}
/* True iff CU's producer generates GNAT Ada auxiliary information
return 0;
}
-
/* Return the auxiliary type of the die in question using its
DW_AT_GNAT_descriptive_type attribute. Returns NULL if the
attribute is not present. */
die_descriptive_type (struct die_info *die, struct dwarf2_cu *cu)
{
struct attribute *type_attr;
- struct die_info *type_die;
type_attr = dwarf2_attr (die, DW_AT_GNAT_descriptive_type, cu);
if (!type_attr)
return NULL;
- type_die = follow_die_ref (die, type_attr, &cu);
- return tag_type_to_type (type_die, cu);
+ return lookup_die_type (die, type_attr, cu);
}
/* If DIE has a descriptive_type attribute, then set the TYPE's
die_containing_type (struct die_info *die, struct dwarf2_cu *cu)
{
struct attribute *type_attr;
- struct die_info *type_die;
type_attr = dwarf2_attr (die, DW_AT_containing_type, cu);
if (!type_attr)
error (_("Dwarf Error: Problem turning containing type into gdb type "
"[in module %s]"), cu->objfile->name);
- type_die = follow_die_ref_or_sig (die, type_attr, &cu);
- return tag_type_to_type (type_die, cu);
+ return lookup_die_type (die, type_attr, cu);
}
+/* Look up the type of DIE in CU using its type attribute ATTR.
+ If there is no type substitute an error marker. */
+
static struct type *
-tag_type_to_type (struct die_info *die, struct dwarf2_cu *cu)
+lookup_die_type (struct die_info *die, struct attribute *attr,
+ struct dwarf2_cu *cu)
{
struct type *this_type;
- this_type = read_type_die (die, cu);
- if (!this_type)
+ /* First see if we have it cached. */
+
+ if (is_ref_attr (attr))
+ {
+ unsigned int offset = dwarf2_get_ref_die_offset (attr);
+
+ this_type = get_die_type_at_offset (offset, cu->per_cu);
+ }
+ else if (attr->form == DW_FORM_sig8)
+ {
+ struct signatured_type *sig_type = DW_SIGNATURED_TYPE (attr);
+ struct dwarf2_cu *sig_cu;
+ unsigned int offset;
+
+ /* sig_type will be NULL if the signatured type is missing from
+ the debug info. */
+ if (sig_type == NULL)
+ error (_("Dwarf Error: Cannot find signatured DIE referenced from DIE "
+ "at 0x%x [in module %s]"),
+ die->offset, cu->objfile->name);
+
+ gdb_assert (sig_type->per_cu.from_debug_types);
+ offset = sig_type->offset + sig_type->type_offset;
+ this_type = get_die_type_at_offset (offset, &sig_type->per_cu);
+ }
+ else
+ {
+ dump_die_for_error (die);
+ error (_("Dwarf Error: Bad type attribute %s [in module %s]"),
+ dwarf_attr_name (attr->name), cu->objfile->name);
+ }
+
+ /* If not cached we need to read it in. */
+
+ if (this_type == NULL)
+ {
+ struct die_info *type_die;
+ struct dwarf2_cu *type_cu = cu;
+
+ type_die = follow_die_ref_or_sig (die, attr, &type_cu);
+ /* If the type is cached, we should have found it above. */
+ gdb_assert (get_die_type (type_die, type_cu) == NULL);
+ this_type = read_type_die_1 (type_die, type_cu);
+ }
+
+ /* If we still don't have a type use an error marker. */
+
+ if (this_type == NULL)
{
char *message, *saved;
this_type = init_type (TYPE_CODE_ERROR, 0, 0, saved, cu->objfile);
}
+
return this_type;
}
+/* Return the type in DIE, CU.
+ Returns NULL for invalid types.
+
+ This first does a lookup in the appropriate type_hash table,
+ and only reads the die in if necessary.
+
+ NOTE: This can be called when reading in partial or full symbols. */
+
static struct type *
read_type_die (struct die_info *die, struct dwarf2_cu *cu)
{
if (this_type)
return this_type;
+ return read_type_die_1 (die, cu);
+}
+
+/* Read the type in DIE, CU.
+ Returns NULL for invalid types. */
+
+static struct type *
+read_type_die_1 (struct die_info *die, struct dwarf2_cu *cu)
+{
+ struct type *this_type = NULL;
+
switch (die->tag)
{
case DW_TAG_class_type:
}
/* Follow reference OFFSET.
- On entry *REF_CU is the CU of source DIE referencing OFFSET.
- On exit *REF_CU is the CU of the result. */
+ On entry *REF_CU is the CU of the source die referencing OFFSET.
+ On exit *REF_CU is the CU of the result.
+ Returns NULL if OFFSET is invalid. */
static struct die_info *
follow_die_offset (unsigned int offset, struct dwarf2_cu **ref_cu)
set_die_type (struct die_info *die, struct type *type, struct dwarf2_cu *cu)
{
struct dwarf2_offset_and_type **slot, ofs;
+ struct objfile *objfile = cu->objfile;
+ htab_t *type_hash_ptr;
/* For Ada types, make sure that the gnat-specific data is always
initialized (if not already set). There are a few types where
&& !HAVE_GNAT_AUX_INFO (type))
INIT_GNAT_SPECIFIC (type);
- if (cu->type_hash == NULL)
+ if (cu->per_cu->from_debug_types)
+ type_hash_ptr = &dwarf2_per_objfile->debug_types_type_hash;
+ else
+ type_hash_ptr = &dwarf2_per_objfile->debug_info_type_hash;
+
+ if (*type_hash_ptr == NULL)
{
- gdb_assert (cu->per_cu != NULL);
- cu->per_cu->type_hash
- = htab_create_alloc_ex (cu->header.length / 24,
+ *type_hash_ptr
+ = htab_create_alloc_ex (127,
offset_and_type_hash,
offset_and_type_eq,
NULL,
- &cu->objfile->objfile_obstack,
+ &objfile->objfile_obstack,
hashtab_obstack_allocate,
dummy_obstack_deallocate);
- cu->type_hash = cu->per_cu->type_hash;
}
ofs.offset = die->offset;
ofs.type = type;
slot = (struct dwarf2_offset_and_type **)
- htab_find_slot_with_hash (cu->type_hash, &ofs, ofs.offset, INSERT);
+ htab_find_slot_with_hash (*type_hash_ptr, &ofs, ofs.offset, INSERT);
if (*slot)
complaint (&symfile_complaints,
_("A problem internal to GDB: DIE 0x%x has type already set"),
die->offset);
- *slot = obstack_alloc (&cu->objfile->objfile_obstack, sizeof (**slot));
+ *slot = obstack_alloc (&objfile->objfile_obstack, sizeof (**slot));
**slot = ofs;
return type;
}
-/* Find the type for DIE in CU's type_hash, or return NULL if DIE does
- not have a saved type. */
+/* Look up the type for the die at DIE_OFFSET in the appropriate type_hash
+ table, or return NULL if the die does not have a saved type. */
static struct type *
-get_die_type (struct die_info *die, struct dwarf2_cu *cu)
+get_die_type_at_offset (unsigned int offset,
+ struct dwarf2_per_cu_data *per_cu)
{
struct dwarf2_offset_and_type *slot, ofs;
- htab_t type_hash = cu->type_hash;
+ htab_t type_hash;
+ if (per_cu->from_debug_types)
+ type_hash = dwarf2_per_objfile->debug_types_type_hash;
+ else
+ type_hash = dwarf2_per_objfile->debug_info_type_hash;
if (type_hash == NULL)
return NULL;
- ofs.offset = die->offset;
+ ofs.offset = offset;
slot = htab_find_with_hash (type_hash, &ofs, ofs.offset);
if (slot)
return slot->type;
return NULL;
}
+/* Look up the type for DIE in the appropriate type_hash table,
+ or return NULL if DIE does not have a saved type. */
+
+static struct type *
+get_die_type (struct die_info *die, struct dwarf2_cu *cu)
+{
+ return get_die_type_at_offset (die->offset, cu->per_cu);
+}
+
/* Add a dependence relationship from CU to REF_PER_CU. */
static void
projects / external / binutils.git / commitdiff