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Support for mini-debuginfo in LLDB

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 Kleine, Konrad

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Support for mini-debuginfo in LLDB
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How to read the .gnu_debugdata section.
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490
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CC Attribution 2.0 Belgium:
You are free to use, adapt and copy, distribute and transmit the work or content in adapted or unchanged form for any legal purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
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Abstract
The "official" mini-debuginfo man-page describes the topic best: Some systems ship pre-built executables and libraries that have a special .gnu_debugdata section. This feature is called MiniDebugInfo. This section holds an LZMA-compressed object and is used to supply extra symbols for backtraces. The intent of this section is to provide extra minimal debugging information for use in simple backtraces. It is not intended to be a replacement for full separate debugging information (see Separate Debug Files). In this talk I'll explain what it took to interpret support for mini-debuginfo in LLDB, how we've tested it, and what to think about when implementing this support (e.g. merging .symtab and .gnu_debugdata sections).