mirror of
https://github.com/Ed94/raddebugger.git
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Nikita Smith
b27b783e6f
Copied the parser from internal repo and integrated with the base layer (not tested) Parser uses based/range pattern for which we have an alternative in string layer (str8_deserial_*)
43 lines
2.2 KiB
Plaintext
43 lines
2.2 KiB
Plaintext
--- DWARF NOTES ---------------------------------------------------------------
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DWARF V4 Spec: http://www.dwarfstd.org/doc/DWARF4.pdf
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DWARF V5 Spec: http://www.dwarfstd.org/doc/DWARF5.pdf
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-------------------------------------------------------------------------------
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$ (2021/04/30) On .debug_pubtypes, .debug_pubnames, and .debug_names:
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.debug_pubtypes and .debug_pubnames are tables that map from a string (the name
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of a type or function respectively) to an offset into .debug_info, which is the
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offset of the Debug Information Entry (DIE, in DWARF terminology) of the info
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associated with the string. THESE TWO SECTIONS ARE OPTIONAL. They don't show up
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in every DWARF-holding file, and so they cannot be relied upon as acceleration
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structures. But we're going to support parsing them, to make things a bit nicer
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in cases where they are present. DWARF doesn't have much in the way of acceler-
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ation structures built in, so our rationale is that we should take anything we
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can get to make the format a bit more in some subset of the possible cases.
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.debug_names is a DWARF V5 section that is intended to replace .debug_pubtypes
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and .debug_pubnames. However, even in cases when DWARF V5 is produced at the
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time of writing this, we have not found .debug_names sections being produced.
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We did not exhaustively test all compilers and configurations, but it seems
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that it is not well-supported at all by major compilers, and there's a very low
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probability that a user will have that section, so our current thinking is
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that there's no point in supporting it right now.
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-------------------------------------------------------------------------------
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$ (2021/04/30) On producing DWARF V5 with Clang:
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https://lists.llvm.org/pipermail/llvm-dev/2018-August/125068.html
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By default it looks like (at the time of writing this) that Clang, by default,
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will produce DWARF V4. To produce DWARF V5, however, you can use the -gdwarf-5
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option. Even when that option is used, it seems that some features of V5 are
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not used (for example, .debug_names).
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The above link also says that this will produce .debug_names, but it doesn't as
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of Clang 10.
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-------------------------------------------------------------------------------
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