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* [binutils-gdb] Move mapped_index_base to new header file
@ 2022-04-20 15:11 Tom Tromey
0 siblings, 0 replies; only message in thread
From: Tom Tromey @ 2022-04-20 15:11 UTC (permalink / raw)
To: gdb-cvs
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=20386fa32d589332a1d8e6f93ad97392218607c5
commit 20386fa32d589332a1d8e6f93ad97392218607c5
Author: Tom Tromey <tom@tromey.com>
Date: Mon Mar 29 17:42:36 2021 -0600
Move mapped_index_base to new header file
This moves mapped_index_base and the helper struct name_component to a
new header file in gdb/dwarf2/.
Diff:
---
gdb/dwarf2/mapped-index.h | 97 +++++++++++++++++++++++++++++++++++++++++++++++
gdb/dwarf2/read.c | 72 -----------------------------------
gdb/dwarf2/read.h | 1 +
3 files changed, 98 insertions(+), 72 deletions(-)
diff --git a/gdb/dwarf2/mapped-index.h b/gdb/dwarf2/mapped-index.h
new file mode 100644
index 00000000000..c2ff27ac4f5
--- /dev/null
+++ b/gdb/dwarf2/mapped-index.h
@@ -0,0 +1,97 @@
+/* Base class for mapped indices
+
+ Copyright (C) 2021 Free Software Foundation, Inc.
+
+ This file is part of GDB.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#ifndef GDB_DWARF2_MAPPED_INDEX_H
+#define GDB_DWARF2_MAPPED_INDEX_H
+
+#include "language.h"
+
+/* An index into a (C++) symbol name component in a symbol name as
+ recorded in the mapped_index's symbol table. For each C++ symbol
+ in the symbol table, we record one entry for the start of each
+ component in the symbol in a table of name components, and then
+ sort the table, in order to be able to binary search symbol names,
+ ignoring leading namespaces, both completion and regular look up.
+ For example, for symbol "A::B::C", we'll have an entry that points
+ to "A::B::C", another that points to "B::C", and another for "C".
+ Note that function symbols in GDB index have no parameter
+ information, just the function/method names. You can convert a
+ name_component to a "const char *" using the
+ 'mapped_index::symbol_name_at(offset_type)' method. */
+
+struct name_component
+{
+ /* Offset in the symbol name where the component starts. Stored as
+ a (32-bit) offset instead of a pointer to save memory and improve
+ locality on 64-bit architectures. */
+ offset_type name_offset;
+
+ /* The symbol's index in the symbol and constant pool tables of a
+ mapped_index. */
+ offset_type idx;
+};
+
+/* Base class containing bits shared by both .gdb_index and
+ .debug_name indexes. */
+
+struct mapped_index_base
+{
+ mapped_index_base () = default;
+ DISABLE_COPY_AND_ASSIGN (mapped_index_base);
+
+ /* The name_component table (a sorted vector). See name_component's
+ description above. */
+ std::vector<name_component> name_components;
+
+ /* How NAME_COMPONENTS is sorted. */
+ enum case_sensitivity name_components_casing;
+
+ /* Return the number of names in the symbol table. */
+ virtual size_t symbol_name_count () const = 0;
+
+ /* Get the name of the symbol at IDX in the symbol table. */
+ virtual const char *symbol_name_at
+ (offset_type idx, dwarf2_per_objfile *per_objfile) const = 0;
+
+ /* Return whether the name at IDX in the symbol table should be
+ ignored. */
+ virtual bool symbol_name_slot_invalid (offset_type idx) const
+ {
+ return false;
+ }
+
+ /* Build the symbol name component sorted vector, if we haven't
+ yet. */
+ void build_name_components (dwarf2_per_objfile *per_objfile);
+
+ /* Returns the lower (inclusive) and upper (exclusive) bounds of the
+ possible matches for LN_NO_PARAMS in the name component
+ vector. */
+ std::pair<std::vector<name_component>::const_iterator,
+ std::vector<name_component>::const_iterator>
+ find_name_components_bounds (const lookup_name_info &ln_no_params,
+ enum language lang,
+ dwarf2_per_objfile *per_objfile) const;
+
+ /* Prevent deleting/destroying via a base class pointer. */
+protected:
+ ~mapped_index_base() = default;
+};
+
+#endif /* GDB_DWARF2_MAPPED_INDEX_H */
diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c
index 6dcd446e5f4..3f44c72565b 100644
--- a/gdb/dwarf2/read.c
+++ b/gdb/dwarf2/read.c
@@ -156,78 +156,6 @@ static int dwarf2_loclist_block_index;
/* Size of .debug_rnglists section header for 64-bit DWARF format. */
#define RNGLIST_HEADER_SIZE64 20
-/* An index into a (C++) symbol name component in a symbol name as
- recorded in the mapped_index's symbol table. For each C++ symbol
- in the symbol table, we record one entry for the start of each
- component in the symbol in a table of name components, and then
- sort the table, in order to be able to binary search symbol names,
- ignoring leading namespaces, both completion and regular look up.
- For example, for symbol "A::B::C", we'll have an entry that points
- to "A::B::C", another that points to "B::C", and another for "C".
- Note that function symbols in GDB index have no parameter
- information, just the function/method names. You can convert a
- name_component to a "const char *" using the
- 'mapped_index::symbol_name_at(offset_type)' method. */
-
-struct name_component
-{
- /* Offset in the symbol name where the component starts. Stored as
- a (32-bit) offset instead of a pointer to save memory and improve
- locality on 64-bit architectures. */
- offset_type name_offset;
-
- /* The symbol's index in the symbol and constant pool tables of a
- mapped_index. */
- offset_type idx;
-};
-
-/* Base class containing bits shared by both .gdb_index and
- .debug_name indexes. */
-
-struct mapped_index_base
-{
- mapped_index_base () = default;
- DISABLE_COPY_AND_ASSIGN (mapped_index_base);
-
- /* The name_component table (a sorted vector). See name_component's
- description above. */
- std::vector<name_component> name_components;
-
- /* How NAME_COMPONENTS is sorted. */
- enum case_sensitivity name_components_casing;
-
- /* Return the number of names in the symbol table. */
- virtual size_t symbol_name_count () const = 0;
-
- /* Get the name of the symbol at IDX in the symbol table. */
- virtual const char *symbol_name_at
- (offset_type idx, dwarf2_per_objfile *per_objfile) const = 0;
-
- /* Return whether the name at IDX in the symbol table should be
- ignored. */
- virtual bool symbol_name_slot_invalid (offset_type idx) const
- {
- return false;
- }
-
- /* Build the symbol name component sorted vector, if we haven't
- yet. */
- void build_name_components (dwarf2_per_objfile *per_objfile);
-
- /* Returns the lower (inclusive) and upper (exclusive) bounds of the
- possible matches for LN_NO_PARAMS in the name component
- vector. */
- std::pair<std::vector<name_component>::const_iterator,
- std::vector<name_component>::const_iterator>
- find_name_components_bounds (const lookup_name_info &ln_no_params,
- enum language lang,
- dwarf2_per_objfile *per_objfile) const;
-
- /* Prevent deleting/destroying via a base class pointer. */
-protected:
- ~mapped_index_base() = default;
-};
-
/* This is a view into the index that converts from bytes to an
offset_type, and allows indexing. Unaligned bytes are specifically
allowed here, and handled via unpacking. */
diff --git a/gdb/dwarf2/read.h b/gdb/dwarf2/read.h
index be3b9d19601..f3b09c63b64 100644
--- a/gdb/dwarf2/read.h
+++ b/gdb/dwarf2/read.h
@@ -26,6 +26,7 @@
#include "dwarf2/cooked-index.h"
#include "dwarf2/file-and-dir.h"
#include "dwarf2/index-cache.h"
+#include "dwarf2/mapped-index.h"
#include "dwarf2/section.h"
#include "filename-seen-cache.h"
#include "gdbsupport/gdb_obstack.h"
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