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LibDebug: Add caches of DIE objects to DwarfInfo

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There is one cache that indexes DIE objects by the start address of
their range, and another cache that indexes by their offset in the
debug_info section.

Both caches are implemented with RedBlackTree, and are optional - they
will only be populated if 'build_cached_dies' is invoked.
This commit is contained in:
Itamar 2021-06-19 11:50:24 +03:00 • committed by Andreas Kling
parent a5f69efa5c
commit 92d4962d04
2 changed files with 74 additions and 2 deletions
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19
Userland/Libraries/LibDebug/Dwarf/DwarfInfo.h
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2020, Itamar S. <itamar8910@gmail.com>
* Copyright (c) 2020-2021, Itamar S. <itamar8910@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -39,6 +39,7 @@ public:
private:
void populate_compilation_units();
void build_cached_dies() const;
ReadonlyBytes section_data(const StringView& section_name) const;
@ -50,6 +51,22 @@ private:
ReadonlyBytes m_debug_line_strings_data;
NonnullOwnPtrVector<Dwarf::CompilationUnit> m_compilation_units;
struct DIERange {
FlatPtr start_address { 0 };
FlatPtr end_address { 0 };
};
struct DIEAndRange {
DIE die;
DIERange range;
};
using DIEStartAddress = FlatPtr;
mutable RedBlackTree<DIEStartAddress, DIEAndRange> m_cached_dies_by_range;
mutable RedBlackTree<FlatPtr, DIE> m_cached_dies_by_offset;
mutable bool m_built_cached_dies { false };
};
template<typename Callback>