Zequan Wu fdede92d43 [lldb][DWARF] Sort ranges list in dwarf 5. (#91343) ...

Dwarf 5 says "There is no requirement that the entries be ordered in any
particular way" in 2.17.3 Non-Contiguous Address Ranges for rnglist.
Some places assume the ranges are already sorted but it's not.

For example, when [parsing function
info](bc8a427620/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp (L922-L927)),
it validates low and hi address of the function: GetMinRangeBase returns
the first range entry base and GetMaxRangeEnd returns the last range
end. If low >= hi, it stops parsing this function. This causes missing
inline stack frames for those functions.

This change fixes it and updates the test
`lldb/test/Shell/SymbolFile/DWARF/x86/debug_rnglists.s` so that two
ranges in `.debug_rnglists` are out of order and `image lookup -v -s
lookup_rnglists` is still able to produce sorted ranges for the inner
block.

2024-05-09 10:42:53 -04:00

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