* dwarf2read.c (stmt_list_hash): New struct.

(type_unit_group): Embed "per_cu" member, remove pointer.
	New union member "t", move member "tus" into it, all uses updated.
	New member "hash", replaces member "line_offset, all uses updated.
	(quick_file_names): Replace member "offset" with "hash", all uses
	updated.
	(hash_stmt_list_entry, eq_stmt_list_entry): New functions.
	(hash_file_name_entry, eq_file_name_entry): Call them.
	(hash_type_unit_group, eq_type_unit_group): Ditto.
	(dw2_get_cu, dw2_get_primary_cu): Replace assert with a better one.
	(dw2_get_file_names_reader): Fix file name table calculation for TUs.
	(dw2_get_file_names): Update.
	(create_type_unit_group): Replace "per_cu" arg with "cu".
	All callers updated.  Fix "quick" (.gdb_index) handling.
	(get_type_unit_group): Replace "per_cu" arg with "cu".
	All callers updated.
	(build_type_unit_groups): Don't reset tu_stats.
This commit is contained in:
Doug Evans 2012-07-16 03:22:40 +00:00
parent 2908cac625
commit 094b34ac0b
2 changed files with 161 additions and 75 deletions

View File

@ -1,5 +1,23 @@
2012-07-15 Doug Evans <dje@google.com>
* dwarf2read.c (stmt_list_hash): New struct.
(type_unit_group): Embed "per_cu" member, remove pointer.
New union member "t", move member "tus" into it, all uses updated.
New member "hash", replaces member "line_offset, all uses updated.
(quick_file_names): Replace member "offset" with "hash", all uses
updated.
(hash_stmt_list_entry, eq_stmt_list_entry): New functions.
(hash_file_name_entry, eq_file_name_entry): Call them.
(hash_type_unit_group, eq_type_unit_group): Ditto.
(dw2_get_cu, dw2_get_primary_cu): Replace assert with a better one.
(dw2_get_file_names_reader): Fix file name table calculation for TUs.
(dw2_get_file_names): Update.
(create_type_unit_group): Replace "per_cu" arg with "cu".
All callers updated. Fix "quick" (.gdb_index) handling.
(get_type_unit_group): Replace "per_cu" arg with "cu".
All callers updated.
(build_type_unit_groups): Don't reset tu_stats.
* symtab.c (filename_seen_cache): Delete members "tab_alloc_size",
"tab_cur_size". Change member "tab" to be a htab_t.
(create_filename_seen_cache): Update.

View File

@ -593,6 +593,18 @@ struct signatured_type
sect_offset type_offset_in_section;
};
/* A struct that can be used as a hash key for tables based on DW_AT_stmt_list.
This includes type_unit_group and quick_file_names. */
struct stmt_list_hash
{
/* The DWO unit this table is from or NULL if there is none. */
struct dwo_unit *dwo_unit;
/* Offset in .debug_line or .debug_line.dwo. */
sect_offset line_offset;
};
/* Each element of dwarf2_per_objfile->type_unit_groups is a pointer to
an object of this type. */
@ -604,20 +616,28 @@ struct type_unit_group
a "per_cu" handle on the symtab.
This PER_CU is recognized by having no section. */
#define IS_TYPE_UNIT_GROUP(per_cu) ((per_cu)->info_or_types_section == NULL)
struct dwarf2_per_cu_data *per_cu;
struct dwarf2_per_cu_data per_cu;
/* The TUs that share this DW_AT_stmt_list entry.
This is added to while parsing type units to build partial symtabs,
and is deleted afterwards and not used again. */
VEC (dwarf2_per_cu_ptr) *tus;
union
{
/* The TUs that share this DW_AT_stmt_list entry.
This is added to while parsing type units to build partial symtabs,
and is deleted afterwards and not used again. */
VEC (dwarf2_per_cu_ptr) *tus;
/* When reading the line table in "quick" functions, we need a real TU.
Any will do, we know they all share the same DW_AT_stmt_list entry.
For simplicity's sake, we pick the first one. */
struct dwarf2_per_cu_data *first_tu;
} t;
/* The primary symtab.
Type units don't have DW_AT_name so we create an essentially
anonymous symtab as the primary symtab. */
Type units in a group needn't all be defined in the same source file,
so we create an essentially anonymous symtab as the primary symtab. */
struct symtab *primary_symtab;
/* Offset in .debug_line. This is the hash key. */
sect_offset line_offset;
/* The data used to construct the hash key. */
struct stmt_list_hash hash;
/* The number of symtabs from the line header.
The value here must match line_header.num_file_names. */
@ -1466,7 +1486,7 @@ static void load_full_type_unit (struct dwarf2_per_cu_data *per_cu);
static void read_signatured_type (struct signatured_type *);
static struct type_unit_group *get_type_unit_group
(struct dwarf2_per_cu_data *, struct attribute *);
(struct dwarf2_cu *, struct attribute *);
static void build_type_unit_groups (die_reader_func_ftype *, void *);
@ -1999,8 +2019,8 @@ dwarf2_get_section_info (struct objfile *objfile,
line_header when we're done and don't need to record it here. */
struct quick_file_names
{
/* The offset in .debug_line of the line table. We hash on this. */
unsigned int offset;
/* The data used to construct the hash key. */
struct stmt_list_hash hash;
/* The number of entries in file_names, real_names. */
unsigned int num_file_names;
@ -2037,6 +2057,34 @@ struct dwarf2_per_cu_quick_data
unsigned int no_file_data : 1;
};
/* Utility hash function for a stmt_list_hash. */
static hashval_t
hash_stmt_list_entry (const struct stmt_list_hash *stmt_list_hash)
{
hashval_t v = 0;
if (stmt_list_hash->dwo_unit != NULL)
v += (uintptr_t) stmt_list_hash->dwo_unit->dwo_file;
v += stmt_list_hash->line_offset.sect_off;
return v;
}
/* Utility equality function for a stmt_list_hash. */
static int
eq_stmt_list_entry (const struct stmt_list_hash *lhs,
const struct stmt_list_hash *rhs)
{
if ((lhs->dwo_unit != NULL) != (rhs->dwo_unit != NULL))
return 0;
if (lhs->dwo_unit != NULL
&& lhs->dwo_unit->dwo_file != rhs->dwo_unit->dwo_file)
return 0;
return lhs->line_offset.sect_off == rhs->line_offset.sect_off;
}
/* Hash function for a quick_file_names. */
static hashval_t
@ -2044,7 +2092,7 @@ hash_file_name_entry (const void *e)
{
const struct quick_file_names *file_data = e;
return file_data->offset;
return hash_stmt_list_entry (&file_data->hash);
}
/* Equality function for a quick_file_names. */
@ -2055,7 +2103,7 @@ eq_file_name_entry (const void *a, const void *b)
const struct quick_file_names *ea = a;
const struct quick_file_names *eb = b;
return ea->offset == eb->offset;
return eq_stmt_list_entry (&ea->hash, &eb->hash);
}
/* Delete function for a quick_file_names. */
@ -2172,12 +2220,9 @@ dw2_get_cu (int index)
{
if (index >= dwarf2_per_objfile->n_comp_units)
{
struct dwarf2_per_cu_data *per_cu;
index -= dwarf2_per_objfile->n_comp_units;
per_cu = &dwarf2_per_objfile->all_type_units[index]->per_cu;
gdb_assert (! IS_TYPE_UNIT_GROUP (per_cu));
return per_cu;
gdb_assert (index < dwarf2_per_objfile->n_type_units);
return &dwarf2_per_objfile->all_type_units[index]->per_cu;
}
return dwarf2_per_objfile->all_comp_units[index];
@ -2203,12 +2248,9 @@ dw2_get_primary_cu (int index)
{
if (index >= dwarf2_per_objfile->n_comp_units)
{
struct dwarf2_per_cu_data *per_cu;
index -= dwarf2_per_objfile->n_comp_units;
per_cu = dwarf2_per_objfile->all_type_unit_groups[index]->per_cu;
gdb_assert (IS_TYPE_UNIT_GROUP (per_cu));
return per_cu;
gdb_assert (index < dwarf2_per_objfile->n_type_unit_groups);
return &dwarf2_per_objfile->all_type_unit_groups[index]->per_cu;
}
return dwarf2_per_objfile->all_comp_units[index];
@ -2621,7 +2663,6 @@ dw2_build_type_unit_groups_reader (const struct die_reader_specs *reader,
void *data)
{
struct dwarf2_cu *cu = reader->cu;
struct dwarf2_per_cu_data *per_cu = cu->per_cu;
struct attribute *attr;
struct type_unit_group *tu_group;
@ -2633,7 +2674,7 @@ dw2_build_type_unit_groups_reader (const struct die_reader_specs *reader,
attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list);
/* Call this for its side-effect of creating the associated
struct type_unit_group if it doesn't already exist. */
tu_group = get_type_unit_group (per_cu, attr);
tu_group = get_type_unit_group (cu, attr);
}
/* Build dwarf2_per_objfile->type_unit_groups.
@ -2658,6 +2699,7 @@ dw2_get_file_names_reader (const struct die_reader_specs *reader,
struct dwarf2_cu *cu = reader->cu;
struct dwarf2_per_cu_data *this_cu = cu->per_cu;
struct objfile *objfile = dwarf2_per_objfile->objfile;
struct dwarf2_per_cu_data *lh_cu;
struct line_header *lh;
struct attribute *attr;
int i;
@ -2674,6 +2716,18 @@ dw2_get_file_names_reader (const struct die_reader_specs *reader,
return;
}
/* If we're reading the line header for TUs, store it in the "per_cu"
for tu_group. */
if (this_cu->is_debug_types)
{
struct type_unit_group *tu_group = data;
gdb_assert (tu_group != NULL);
lh_cu = &tu_group->per_cu;
}
else
lh_cu = this_cu;
lh = NULL;
slot = NULL;
line_offset = 0;
@ -2687,12 +2741,13 @@ dw2_get_file_names_reader (const struct die_reader_specs *reader,
/* We may have already read in this line header (TU line header sharing).
If we have we're done. */
find_entry.offset = line_offset;
find_entry.hash.dwo_unit = cu->dwo_unit;
find_entry.hash.line_offset.sect_off = line_offset;
slot = htab_find_slot (dwarf2_per_objfile->quick_file_names_table,
&find_entry, INSERT);
if (*slot != NULL)
{
this_cu->v.quick->file_names = *slot;
lh_cu->v.quick->file_names = *slot;
return;
}
@ -2700,12 +2755,13 @@ dw2_get_file_names_reader (const struct die_reader_specs *reader,
}
if (lh == NULL)
{
this_cu->v.quick->no_file_data = 1;
lh_cu->v.quick->no_file_data = 1;
return;
}
qfn = obstack_alloc (&objfile->objfile_obstack, sizeof (*qfn));
qfn->offset = line_offset;
qfn->hash.dwo_unit = cu->dwo_unit;
qfn->hash.line_offset.sect_off = line_offset;
gdb_assert (slot != NULL);
*slot = qfn;
@ -2720,7 +2776,7 @@ dw2_get_file_names_reader (const struct die_reader_specs *reader,
free_line_header (lh);
this_cu->v.quick->file_names = qfn;
lh_cu->v.quick->file_names = qfn;
}
/* A helper for the "quick" functions which attempts to read the line
@ -2745,8 +2801,12 @@ dw2_get_file_names (struct objfile *objfile,
However, that's not the case for TUs where DW_AT_stmt_list lives in the
DWO file. */
if (this_cu->is_debug_types)
init_cutu_and_read_dies (this_cu, NULL, 0, 0,
dw2_get_file_names_reader, NULL);
{
struct type_unit_group *tu_group = this_cu->s.type_unit_group;
init_cutu_and_read_dies (tu_group->t.first_tu, NULL, 0, 0,
dw2_get_file_names_reader, tu_group);
}
else
init_cutu_and_read_dies_simple (this_cu, dw2_get_file_names_reader, NULL);
@ -4707,9 +4767,9 @@ process_psymtab_comp_unit (struct dwarf2_per_cu_data *this_cu,
static hashval_t
hash_type_unit_group (const void *item)
{
const struct type_unit_group *symtab = item;
const struct type_unit_group *tu_group = item;
return symtab->line_offset.sect_off;
return hash_stmt_list_entry (&tu_group->hash);
}
static int
@ -4718,7 +4778,7 @@ eq_type_unit_group (const void *item_lhs, const void *item_rhs)
const struct type_unit_group *lhs = item_lhs;
const struct type_unit_group *rhs = item_rhs;
return lhs->line_offset.sect_off == rhs->line_offset.sect_off;
return eq_stmt_list_entry (&lhs->hash, &rhs->hash);
}
/* Allocate a hash table for type unit groups. */
@ -4741,54 +4801,59 @@ allocate_type_unit_groups_table (void)
#define NO_STMT_LIST_TYPE_UNIT_PSYMTAB (1 << 31)
#define NO_STMT_LIST_TYPE_UNIT_PSYMTAB_SIZE 10
/* Helper routine for build_type_psymtabs_reader.
/* Helper routine for get_type_unit_group.
Create the type_unit_group object used to hold one or more TUs. */
static struct type_unit_group *
create_type_unit_group (struct dwarf2_per_cu_data *per_cu,
sect_offset line_offset_struct)
create_type_unit_group (struct dwarf2_cu *cu, sect_offset line_offset_struct)
{
struct objfile *objfile = dwarf2_per_objfile->objfile;
struct dwarf2_per_cu_data *per_cu;
struct type_unit_group *tu_group;
struct partial_symtab *pst;
unsigned int line_offset;
char *name;
line_offset = line_offset_struct.sect_off;
/* Give the symtab a useful name for debug purposes. */
if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0)
name = xstrprintf ("<type_units_%d>",
(line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB));
else
name = xstrprintf ("<type_units_at_0x%x>", line_offset);
tu_group = OBSTACK_ZALLOC (&objfile->objfile_obstack,
struct type_unit_group);
per_cu = OBSTACK_ZALLOC (&objfile->objfile_obstack,
struct dwarf2_per_cu_data);
per_cu = &tu_group->per_cu;
per_cu->objfile = objfile;
per_cu->is_debug_types = 1;
per_cu->s.type_unit_group = tu_group;
pst = create_partial_symtab (per_cu, name);
pst->anonymous = 1;
if (dwarf2_per_objfile->using_index)
{
per_cu->v.quick = OBSTACK_ZALLOC (&objfile->objfile_obstack,
struct dwarf2_per_cu_quick_data);
tu_group->t.first_tu = cu->per_cu;
}
else
{
unsigned int line_offset = line_offset_struct.sect_off;
struct partial_symtab *pst;
char *name;
xfree (name);
/* Give the symtab a useful name for debug purposes. */
if ((line_offset & NO_STMT_LIST_TYPE_UNIT_PSYMTAB) != 0)
name = xstrprintf ("<type_units_%d>",
(line_offset & ~NO_STMT_LIST_TYPE_UNIT_PSYMTAB));
else
name = xstrprintf ("<type_units_at_0x%x>", line_offset);
tu_group->per_cu = per_cu;
tu_group->line_offset.sect_off = line_offset;
pst = create_partial_symtab (per_cu, name);
pst->anonymous = 1;
xfree (name);
}
tu_group->hash.dwo_unit = cu->dwo_unit;
tu_group->hash.line_offset = line_offset_struct;
return tu_group;
}
/* Look up the type_unit_group for PER_CU, and create it if necessary.
STMT_LIST is an DW_AT_stmt_list attribute. */
/* Look up the type_unit_group for type unit CU, and create it if necessary.
STMT_LIST is a DW_AT_stmt_list attribute. */
static struct type_unit_group *
get_type_unit_group (struct dwarf2_per_cu_data *per_cu,
struct attribute *stmt_list)
get_type_unit_group (struct dwarf2_cu *cu, struct attribute *stmt_list)
{
struct tu_stats *tu_stats = &dwarf2_per_objfile->tu_stats;
struct type_unit_group *tu_group;
@ -4822,7 +4887,8 @@ get_type_unit_group (struct dwarf2_per_cu_data *per_cu,
++tu_stats->nr_stmt_less_type_units;
}
type_unit_group_for_lookup.line_offset.sect_off = line_offset;
type_unit_group_for_lookup.hash.dwo_unit = cu->dwo_unit;
type_unit_group_for_lookup.hash.line_offset.sect_off = line_offset;
slot = htab_find_slot (dwarf2_per_objfile->type_unit_groups,
&type_unit_group_for_lookup, INSERT);
if (*slot != NULL)
@ -4835,7 +4901,7 @@ get_type_unit_group (struct dwarf2_per_cu_data *per_cu,
sect_offset line_offset_struct;
line_offset_struct.sect_off = line_offset;
tu_group = create_type_unit_group (per_cu, line_offset_struct);
tu_group = create_type_unit_group (cu, line_offset_struct);
*slot = tu_group;
++tu_stats->nr_symtabs;
}
@ -4953,7 +5019,9 @@ build_type_unit_groups (die_reader_func_ftype *func, void *data)
qsort (sorted_by_abbrev, dwarf2_per_objfile->n_type_units,
sizeof (struct tu_abbrev_offset), sort_tu_by_abbrev_offset);
memset (tu_stats, 0, sizeof (*tu_stats));
/* Note: In the .gdb_index case, get_type_unit_group may have already been
called any number of times, so we don't reset tu_stats here. */
abbrev_offset.sect_off = ~(unsigned) 0;
abbrev_table = NULL;
make_cleanup (abbrev_table_free_cleanup, &abbrev_table);
@ -5040,9 +5108,9 @@ build_type_psymtabs_reader (const struct die_reader_specs *reader,
return;
attr = dwarf2_attr_no_follow (type_unit_die, DW_AT_stmt_list);
tu_group = get_type_unit_group (per_cu, attr);
tu_group = get_type_unit_group (cu, attr);
VEC_safe_push (dwarf2_per_cu_ptr, tu_group->tus, per_cu);
VEC_safe_push (dwarf2_per_cu_ptr, tu_group->t.tus, per_cu);
prepare_one_comp_unit (cu, type_unit_die, language_minimal);
cu->list_in_scope = &file_symbols;
@ -5069,9 +5137,9 @@ build_type_psymtab_dependencies (void **slot, void *info)
{
struct objfile *objfile = dwarf2_per_objfile->objfile;
struct type_unit_group *tu_group = (struct type_unit_group *) *slot;
struct dwarf2_per_cu_data *per_cu = tu_group->per_cu;
struct dwarf2_per_cu_data *per_cu = &tu_group->per_cu;
struct partial_symtab *pst = per_cu->v.psymtab;
int len = VEC_length (dwarf2_per_cu_ptr, tu_group->tus);
int len = VEC_length (dwarf2_per_cu_ptr, tu_group->t.tus);
struct dwarf2_per_cu_data *iter;
int i;
@ -5081,14 +5149,14 @@ build_type_psymtab_dependencies (void **slot, void *info)
pst->dependencies = obstack_alloc (&objfile->objfile_obstack,
len * sizeof (struct psymtab *));
for (i = 0;
VEC_iterate (dwarf2_per_cu_ptr, tu_group->tus, i, iter);
VEC_iterate (dwarf2_per_cu_ptr, tu_group->t.tus, i, iter);
++i)
{
pst->dependencies[i] = iter->v.psymtab;
iter->s.type_unit_group = tu_group;
}
VEC_free (dwarf2_per_cu_ptr, tu_group->tus);
VEC_free (dwarf2_per_cu_ptr, tu_group->t.tus);
return 1;
}
@ -6718,8 +6786,8 @@ process_full_type_unit (struct dwarf2_per_cu_data *per_cu,
/* TUs share symbol tables.
If this is the first TU to use this symtab, complete the construction
of it with end_symtab. Otherwise, complete the addition of this TU's
symbols to the existing symtab. */
of it with end_expandable_symtab. Otherwise, complete the addition of
this TU's symbols to the existing symtab. */
if (per_cu->s.type_unit_group->primary_symtab == NULL)
{
symtab = end_expandable_symtab (0, objfile, SECT_OFF_TEXT (objfile));
@ -7658,7 +7726,7 @@ setup_type_unit_groups (struct die_info *die, struct dwarf2_cu *cu)
/* If we're using .gdb_index (includes -readnow) then
per_cu->s.type_unit_group may not have been set up yet. */
if (per_cu->s.type_unit_group == NULL)
per_cu->s.type_unit_group = get_type_unit_group (per_cu, attr);
per_cu->s.type_unit_group = get_type_unit_group (cu, attr);
tu_group = per_cu->s.type_unit_group;
/* If we've already processed this stmt_list there's no real need to