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LibDebug: Add DwarfInfo::get_cached_die_at_offset

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This function returns a DIE object from the cache with the given offset
in the debug_info section.
This commit is contained in:
Itamar 2021-06-19 12:03:14 +03:00 • committed by Andreas Kling
parent fb31aae20d
commit 835efa1b6a
2 changed files with 18 additions and 0 deletions
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11
Userland/Libraries/LibDebug/Dwarf/DwarfInfo.cpp
View file

@ -308,4 +308,15 @@ Optional<DIE> DwarfInfo::get_die_at_address(FlatPtr address) const
return iter->die; return iter->die;
} }
Optional<DIE> DwarfInfo::get_cached_die_at_offset(FlatPtr offset) const
{
if (!m_built_cached_dies)
build_cached_dies();
auto* die = m_cached_dies_by_offset.find(offset);
if (!die)
return {};
return *die;
}
} }

7
Userland/Libraries/LibDebug/Dwarf/DwarfInfo.h
View file

@ -39,6 +39,13 @@ public:
Optional<DIE> get_die_at_address(FlatPtr) const; Optional<DIE> get_die_at_address(FlatPtr) const;
// Note that even if there is a DIE at the given offset,
// but it does not exist in the DIE cache (because for example
// it does not contain an address range), then this function will not return it.
// To get any DIE object at a given offset in a compilation unit,
// use CompilationUnit::get_die_at_offset.
Optional<DIE> get_cached_die_at_offset(FlatPtr) const;
private: private:
void populate_compilation_units(); void populate_compilation_units();
void build_cached_dies() const; void build_cached_dies() const;