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Pass ConstString by value
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Authored by aprantl on Mar 6 2019, 9:29 AM.

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Summary

My apologies for the large patch. With the exception of ConstString.h itself it was entirely produced by sed.

I technically only need one of these changes to fix a taking-reference-of-local-object bug that Jason discovered on the swift-lldb branch, but while I'm at it I thought I might as well do all at once.

ConstString has exactly one const char * data member, so passing a ConstString by reference is not any more efficient than copying it by value. In both cases a single pointer is passed. But passing it by value makes it harder to accidentally return the address of a local object.

(This fixes rdar://problem/48640859 for the Apple folks)

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rL LLVM

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aprantl created this revision.Mar 6 2019, 9:29 AM
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aprantl edited the summary of this revision. (Show Details)Mar 6 2019, 9:33 AM
jasonmolenda accepted this revision.Mar 6 2019, 1:14 PM

Looks good to me.

lldb/www/architecture/varformats.html
121 ↗(On Diff #189523)

big bug! :)

This revision is now accepted and ready to land.Mar 6 2019, 1:14 PM
Closed by commit rL355553: Pass ConstString by value (NFC) (authored by adrian, committed by ). · Explain WhyMar 6 2019, 1:22 PM
This revision was automatically updated to reflect the committed changes.
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