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Generate DWARF address ranges for faster lookups #66532

Merged
merged 2 commits into from
Nov 20, 2019
Merged

Generate DWARF address ranges for faster lookups #66532

merged 2 commits into from
Nov 20, 2019

Commits on Nov 18, 2019

  1. Generate DWARF address ranges for faster lookups 

    This adds a new option `-Zgenerate-arange-section`, enabled by default,
corresponding to LLVM's `-generate-arange-section`. This creates a
`.debug_aranges` section with DWARF address ranges, which some tools
depend on to optimize address lookups (elfutils [22288], [25173]).

This only has effect when debuginfo is enabled, and the additional data
is small compared to the other debug sections. For example, libstd.so
with full debuginfo is about 11MB, with just 61kB in aranges.

[22288]: https://sourceware.org/bugzilla/show_bug.cgi?id=22288
[25173]: https://sourceware.org/bugzilla/show_bug.cgi?id=25173

Closes rust-lang#45246.
    @cuviper
    cuviper committed Nov 18, 2019
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Commits on Nov 19, 2019

  1. Mark -Zgenerate-arange-section as TRACKED

    @cuviper
    cuviper committed Nov 19, 2019
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