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Simplify debug_names index writing

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This changes the .debug_names writer to find the TU indices in the
main loop over all CUs and TUs.  (An earlier patch applied this same
treatment to the .gdb_index writer.)
This commit is contained in:
Tom Tromey 2021-05-29 07:25:57 -06:00
parent 844a72efbc
commit 09e2fb720b
1 changed files with 10 additions and 83 deletions
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91
gdb/dwarf2/index-write.c
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@ -586,21 +586,6 @@ write_psymbols (struct mapped_symtab *symtab,
}
}
/* A helper struct used when iterating over debug_types. */
struct signatured_type_index_data
{
signatured_type_index_data (data_buf &types_list_,
std::unordered_set<partial_symbol *> &psyms_seen_)
: types_list (types_list_), psyms_seen (psyms_seen_)
{}
struct objfile *objfile;
struct mapped_symtab *symtab;
data_buf &types_list;
std::unordered_set<partial_symbol *> &psyms_seen;
int cu_index;
};
/* Recurse into all "included" dependencies and count their symbols as
if they appeared in this psymtab. */
@ -903,32 +888,6 @@ public:
m_debugstrlookup.file_write (file_str);
}
/* A helper user data for write_one_signatured_type. */
class write_one_signatured_type_data
{
public:
write_one_signatured_type_data (debug_names &nametable_,
signatured_type_index_data &&info_)
: nametable (nametable_), info (std::move (info_))
{}
debug_names &nametable;
struct signatured_type_index_data info;
};
/* A helper function to pass write_one_signatured_type to
htab_traverse_noresize. */
static int
write_one_signatured_type (void **slot, void *d)
{
write_one_signatured_type_data *data = (write_one_signatured_type_data *) d;
struct signatured_type_index_data *info = &data->info;
struct signatured_type *entry = (struct signatured_type *) *slot;
data->nametable.write_one_signatured_type (entry, info);
return 1;
}
private:
/* Storage for symbol names mapping them to their .debug_str section
@ -1211,25 +1170,6 @@ private:
}
}
/* A helper function that writes a single signatured_type
to a debug_names. */
void
write_one_signatured_type (struct signatured_type *entry,
struct signatured_type_index_data *info)
{
partial_symtab *psymtab = entry->v.psymtab;
write_psymbols (info->psyms_seen, psymtab->global_psymbols,
info->cu_index, false, unit_kind::tu);
write_psymbols (info->psyms_seen, psymtab->static_psymbols,
info->cu_index, true, unit_kind::tu);
info->types_list.append_uint (dwarf5_offset_size (), m_dwarf5_byte_order,
to_underlying (entry->sect_off));
++info->cu_index;
}
/* Store value of each symbol. */
std::unordered_map<c_str_view, std::set<symbol_value>, c_str_view_hasher>
m_name_to_value_set;
@ -1476,17 +1416,16 @@ write_debug_names (dwarf2_per_objfile *per_objfile,
work here. Also, the debug_types entries do not appear in
all_comp_units, but only in their own hash table. */
data_buf cu_list;
data_buf types_cu_list;
debug_names nametable (per_objfile, dwarf5_is_dwarf64, dwarf5_byte_order);
std::unordered_set<partial_symbol *>
psyms_seen (psyms_seen_size (per_objfile));
int counter = 0;
int types_counter = 0;
for (int i = 0; i < per_objfile->per_bfd->all_comp_units.size (); ++i)
{
const dwarf2_per_cu_data *per_cu
= per_objfile->per_bfd->all_comp_units[i].get ();
if (per_cu->is_debug_types)
continue;
partial_symtab *psymtab = per_cu->v.psymtab;
/* CU of a shared file from 'dwz -m' may be unused by this main
@ -1495,29 +1434,17 @@ write_debug_names (dwarf2_per_objfile *per_objfile,
if (psymtab == NULL)
continue;
int &this_counter = per_cu->is_debug_types ? types_counter : counter;
data_buf &this_list = per_cu->is_debug_types ? types_cu_list : cu_list;
if (psymtab->user == NULL)
nametable.recursively_write_psymbols (objfile, psymtab, psyms_seen,
counter);
this_counter);
cu_list.append_uint (nametable.dwarf5_offset_size (), dwarf5_byte_order,
this_list.append_uint (nametable.dwarf5_offset_size (),
dwarf5_byte_order,
to_underlying (per_cu->sect_off));
++counter;
}
/* Write out the .debug_type entries, if any. */
data_buf types_cu_list;
if (per_objfile->per_bfd->signatured_types)
{
debug_names::write_one_signatured_type_data sig_data (nametable,
signatured_type_index_data (types_cu_list, psyms_seen));
sig_data.info.objfile = objfile;
/* It is used only for gdb_index. */
sig_data.info.symtab = nullptr;
sig_data.info.cu_index = 0;
htab_traverse_noresize (per_objfile->per_bfd->signatured_types.get (),
debug_names::write_one_signatured_type,
&sig_data);
++this_counter;
}
nametable.build ();