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32bit armv7l valgrind error #847

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rustyrussell opened this issue Nov 17, 2020 · 3 comments
Closed

32bit armv7l valgrind error #847

rustyrussell opened this issue Nov 17, 2020 · 3 comments

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@rustyrussell
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ElementsProject/lightning#4203

Seems like gcc is turning the "*r = *a" into memcpy, and various (all?) callers have r == a. Technically disallowed, but gcc may be allowed to make this assumption?
@real-or-random
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Ah, that's the same as #776, just not in a -Os build... Sad that it happens here too.

@elichai
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elichai commented Nov 18, 2020

Now gcc too? :(

@real-or-random
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Oh indeed, so far we've seen this only with clang... Let's track this in #776.

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@rustyrussell @real-or-random @elichai