From: Tom Tromey <tom@tromey.com>
To: gdb-patches@sourceware.org
Cc: Tom Tromey <tom@tromey.com>
Subject: [PATCH v4 17/34] Update skip_one_die for new abbrev properties
Date: Mon, 4 Apr 2022 13:53:18 -0600 [thread overview]
Message-ID: <20220404195335.2111906-18-tom@tromey.com> (raw)
In-Reply-To: <20220404195335.2111906-1-tom@tromey.com>
This updates skip_one_die to speed it up in the cases where either
sibling_offset or size_if_constant are set.
---
gdb/dwarf2/read.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c
index 84b33809384..09cea288422 100644
--- a/gdb/dwarf2/read.c
+++ b/gdb/dwarf2/read.c
@@ -8393,6 +8393,24 @@ skip_one_die (const struct die_reader_specs *reader, const gdb_byte *info_ptr,
const gdb_byte *buffer_end = reader->buffer_end;
unsigned int form, i;
+ if (do_skip_children && abbrev->sibling_offset != (unsigned short) -1)
+ {
+ /* We only handle DW_FORM_ref4 here. */
+ const gdb_byte *sibling_data = info_ptr + abbrev->sibling_offset;
+ unsigned int offset = read_4_bytes (abfd, sibling_data);
+ const gdb_byte *sibling_ptr = buffer + offset;
+ if (sibling_ptr >= info_ptr && sibling_ptr < reader->buffer_end)
+ return sibling_ptr;
+ /* Fall through to the slow way. */
+ }
+ else if (abbrev->size_if_constant != 0)
+ {
+ info_ptr += abbrev->size_if_constant;
+ if (do_skip_children && abbrev->has_children)
+ return skip_children (reader, info_ptr);
+ return info_ptr;
+ }
+
for (i = 0; i < abbrev->num_attrs; i++)
{
/* The only abbrev we care about is DW_AT_sibling. */
--
2.34.1
next prev parent reply other threads:[~2022-04-04 19:53 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-04 19:53 [PATCH v4 00/34] Rewrite the DWARF "partial" reader Tom Tromey
2022-04-04 19:53 ` [PATCH v4 01/34] Allow thread-pool.h to work without threads Tom Tromey
2022-04-08 16:13 ` Pedro Alves
2022-04-04 19:53 ` [PATCH v4 02/34] Split create_addrmap_from_aranges Tom Tromey
2022-04-04 19:53 ` [PATCH v4 03/34] Fix latent bug in read_addrmap_from_aranges Tom Tromey
2022-04-04 19:53 ` [PATCH v4 04/34] Add dwarf2_per_cu_data::addresses_seen Tom Tromey
2022-04-04 19:53 ` [PATCH v4 05/34] Refactor dwarf2_get_pc_bounds Tom Tromey
2022-04-04 19:53 ` [PATCH v4 06/34] Allow ada_decode not to decode operators Tom Tromey
2022-04-04 19:53 ` [PATCH v4 07/34] Let skip_one_die not skip children Tom Tromey
2022-04-04 19:53 ` [PATCH v4 08/34] Add name splitting Tom Tromey
2022-04-04 19:53 ` [PATCH v4 09/34] Add new overload of dwarf5_djb_hash Tom Tromey
2022-04-04 19:53 ` [PATCH v4 10/34] Refactor build_type_psymtabs_reader Tom Tromey
2022-04-04 19:53 ` [PATCH v4 11/34] Add batching parameter to parallel_for_each Tom Tromey
2022-04-04 19:53 ` [PATCH v4 12/34] Return vector of results from parallel_for_each Tom Tromey
2022-04-04 19:53 ` [PATCH v4 13/34] Specialize std::hash for gdb_exception Tom Tromey
2022-04-04 19:53 ` [PATCH v4 14/34] Add "fullname" handling to file_and_directory Tom Tromey
2022-04-04 19:53 ` [PATCH v4 15/34] Introduce DWARF abbrev cache Tom Tromey
2022-04-04 19:53 ` [PATCH v4 16/34] Statically examine abbrev properties Tom Tromey
2022-04-04 19:53 ` Tom Tromey [this message]
2022-04-04 19:53 ` [PATCH v4 18/34] Introduce the new DWARF index class Tom Tromey
2022-04-10 17:38 ` Tom Tromey
2022-04-14 5:32 ` Enze Li
2022-04-14 11:52 ` Simon Marchi
2022-04-04 19:53 ` [PATCH v4 19/34] The new DWARF indexer Tom Tromey
2022-04-04 19:53 ` [PATCH v4 20/34] Implement quick_symbol_functions for cooked DWARF index Tom Tromey
2022-04-04 19:53 ` [PATCH v4 21/34] Wire in the new DWARF indexer Tom Tromey
2022-04-04 19:53 ` [PATCH v4 22/34] Introduce thread-safe handling for complaints Tom Tromey
2022-04-04 19:53 ` [PATCH v4 23/34] Pre-read DWARF section data Tom Tromey
2022-04-04 19:53 ` [PATCH v4 24/34] Parallelize DWARF indexing Tom Tromey
2022-04-04 19:53 ` [PATCH v4 25/34] "Finalize" the DWARF index in the background Tom Tromey
2022-04-04 19:53 ` [PATCH v4 26/34] Rename write_psymtabs_to_index Tom Tromey
2022-04-04 19:53 ` [PATCH v4 27/34] Change the key type in psym_index_map Tom Tromey
2022-04-04 19:53 ` [PATCH v4 28/34] Change parameters to write_address_map Tom Tromey
2022-04-04 19:53 ` [PATCH v4 29/34] Genericize addrmap handling in the DWARF index writer Tom Tromey
2022-04-04 19:53 ` [PATCH v4 30/34] Adapt .gdb_index writer to new DWARF scanner Tom Tromey
2022-04-04 19:53 ` [PATCH v4 31/34] Adapt .debug_names " Tom Tromey
2022-04-04 19:53 ` [PATCH v4 32/34] Enable the new DWARF indexer Tom Tromey
2022-04-04 19:53 ` [PATCH v4 33/34] Delete DWARF psymtab code Tom Tromey
2022-04-04 19:53 ` [PATCH v4 34/34] Remove dwarf2_per_cu_data::v Tom Tromey
2022-04-12 15:30 ` [PATCH v4 00/34] Rewrite the DWARF "partial" reader Tom Tromey
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