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symbolizer: add support for looking up CUs using the .gdb_index if present #2112

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@oremanj oremanj commented Dec 20, 2023

This provides similar information as .debug_aranges but is better supported on DWARFv4 and with clang. Since it is generated at link time, it has the additional benefit that it is complete, meaning it can return negative results (for symbols such as _start that may be implemented in assembly and thus have no associated debug info) without walking the full debuginfo list.

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This provides similar information as `.debug_aranges` but is better supported on DWARFv4 and with clang. Since it is generated at link time, it has the additional benefit that it is complete, meaning it can return negative results (for symbols such as `_start` that may be implemented in assembly and thus have no associated debug info) without walking the full debuginfo list.
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@Orvid has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

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Orvid commented Jan 23, 2024

How was this tested? Would it be possible to add to the existing test suite?

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