From: Tom Tromey <tom@tromey.com>
To: gdb-patches@sourceware.org
Cc: Tom Tromey <tom@tromey.com>
Subject: [PATCH 14/30] Update skip_one_die for new abbrev properties
Date: Wed, 25 Aug 2021 20:19:21 -0600 [thread overview]
Message-ID: <20210826021937.1490292-15-tom@tromey.com> (raw)
In-Reply-To: <20210826021937.1490292-1-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 464e1452d9b..14df7ea4f4e 100644
--- a/gdb/dwarf2/read.c
+++ b/gdb/dwarf2/read.c
@@ -8326,6 +8326,24 @@ 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. */
--
2.31.1
next prev parent reply other threads:[~2021-08-26 2:19 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-26 2:19 [PATCH 00/30] Rewrite the DWARF "partial" reader Tom Tromey
2021-08-26 2:19 ` [PATCH 01/30] Introduce make_unique_xstrndup Tom Tromey
2021-08-26 2:19 ` [PATCH 02/30] Split create_addrmap_from_aranges Tom Tromey
2021-08-26 2:19 ` [PATCH 03/30] Add dwarf2_per_cu_data::addresses_seen Tom Tromey
2021-08-26 2:19 ` [PATCH 04/30] Refactor dwarf2_get_pc_bounds Tom Tromey
2021-08-26 2:19 ` [PATCH 05/30] Allow ada_decode not to decode operators Tom Tromey
2021-08-26 2:19 ` [PATCH 06/30] Let skip_one_die not skip children Tom Tromey
2021-08-26 2:19 ` [PATCH 07/30] Add name splitting Tom Tromey
2021-08-26 2:19 ` [PATCH 08/30] Add new overload of dwarf5_djb_hash Tom Tromey
2021-08-26 2:19 ` [PATCH 09/30] Refactor build_type_psymtabs_reader Tom Tromey
2021-08-26 2:19 ` [PATCH 10/30] Add batching parameter to parallel_for_each Tom Tromey
2021-08-26 2:19 ` [PATCH 11/30] Return vector of results from parallel_for_each Tom Tromey
2021-08-27 6:20 ` Tom de Vries
2021-08-28 19:20 ` Tom Tromey
2021-08-26 2:19 ` [PATCH 12/30] Introduce DWARF abbrev cache Tom Tromey
2021-08-26 2:19 ` [PATCH 13/30] Statically examine abbrev properties Tom Tromey
2021-09-06 22:31 ` Lancelot SIX
2021-11-04 18:00 ` Tom Tromey
2021-08-26 2:19 ` Tom Tromey [this message]
2021-08-26 2:19 ` [PATCH 15/30] Introduce the new DWARF index class Tom Tromey
2021-09-09 23:32 ` Lancelot SIX
2021-11-04 18:03 ` Tom Tromey
2021-08-26 2:19 ` [PATCH 16/30] The new DWARF indexer Tom Tromey
2021-08-26 2:19 ` [PATCH 17/30] Implement quick_symbol_functions for cooked DWARF index Tom Tromey
2021-08-26 2:19 ` [PATCH 18/30] Wire in the new DWARF indexer Tom Tromey
2021-08-26 2:19 ` [PATCH 19/30] Pre-read DWARF section data Tom Tromey
2021-08-26 2:19 ` [PATCH 20/30] Parallelize DWARF indexing Tom Tromey
2021-08-26 2:19 ` [PATCH 21/30] "Finalize" the DWARF index in the background Tom Tromey
2021-08-26 2:19 ` [PATCH 22/30] Rename write_psymtabs_to_index Tom Tromey
2021-08-26 2:19 ` [PATCH 23/30] Change the key type in psym_index_map Tom Tromey
2021-08-26 2:19 ` [PATCH 24/30] Change parameters to write_address_map Tom Tromey
2021-08-26 2:19 ` [PATCH 25/30] Genericize addrmap handling in the DWARF index writer Tom Tromey
2021-08-26 2:19 ` [PATCH 26/30] Adapt .gdb_index writer to new DWARF scanner Tom Tromey
2021-08-26 2:19 ` [PATCH 27/30] Adapt .debug_names " Tom Tromey
2021-08-26 2:19 ` [PATCH 28/30] Enable the new DWARF indexer Tom Tromey
2021-08-26 2:19 ` [PATCH 29/30] Delete DWARF psymtab code Tom Tromey
2021-08-26 2:19 ` [PATCH 30/30] Remove dwarf2_per_cu_data::v Tom Tromey
2021-08-26 20:32 ` [PATCH 00/30] Rewrite the DWARF "partial" reader Tom de Vries
2021-08-26 21:29 ` Tom Tromey
2021-08-27 7:31 ` Tom de Vries
2021-08-30 15:04 ` Tom Tromey
2021-09-06 19:46 ` Tom Tromey
2021-09-07 10:58 ` Tom de Vries
2021-09-07 12:16 ` Tom de Vries
2021-10-29 23:06 ` Tom Tromey
2021-09-09 19:00 ` Wei-min Pan
2021-09-11 21:08 ` Tom Tromey
2021-09-13 16:50 ` Weimin Pan
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