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LibDebug: Support addrx*, strx* and rnglistx forms

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These forms were introduced in DWARF5, and have a fair deal of
advantages over the more traditional encodings: they reduce the size of
the binary and the number of relocations.

GCC does not emit these with `-g1` by default, but Clang does at all
debug levels.
This commit is contained in:
Daniel Bertalan 2021-10-09 17:38:26 +02:00 • committed by Linus Groh
parent 8e5b70a0ba
commit ac53569bd1
7 changed files with 213 additions and 3 deletions
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18
Userland/Libraries/LibDebug/Dwarf/CompilationUnit.h
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@ -31,19 +31,35 @@ public:
DIE root_die() const;
DIE get_die_at_offset(u32 offset) const;
FlatPtr get_address(size_t index) const;
char const* get_string(size_t index) const;
DwarfInfo const& dwarf_info() const { return m_dwarf_info; }
AbbreviationsMap const& abbreviations_map() const { return m_abbreviations; }
LineProgram const& line_program() const { return *m_line_program; }
Optional<FlatPtr> base_address() const;
// DW_AT_addr_base
u64 address_table_base() const;
// DW_AT_str_offsets_base
u64 string_offsets_base() const;
// DW_AT_rnglists_base
u64 range_lists_base() const;
private:
DwarfInfo const& m_dwarf_info;
u32 m_offset { 0 };
CompilationUnitHeader m_header;
AbbreviationsMap m_abbreviations;
NonnullOwnPtr<LineProgram> m_line_program;
mutable bool m_has_cached_base_address { false };
mutable bool m_has_cached_base_address : 1 { false };
mutable bool m_has_cached_address_table_base : 1 { false };
mutable bool m_has_cached_string_offsets_base : 1 { false };
mutable bool m_has_cached_range_lists_base : 1 { false };
mutable Optional<FlatPtr> m_cached_base_address;
mutable u64 m_cached_address_table_base { 0 };
mutable u64 m_cached_string_offsets_base { 0 };
mutable u64 m_cached_range_lists_base { 0 };
};
}