tree 2216c9a35949ec1bec7ac8a537114e602c8233ac
parent 50ce28fbd1c468aa51833033825e288415fac2bc
author Vitaly Buka <vitalybuka@google.com> 1620171299 -0700
committer Copybara-Service <copybara-worker@google.com> 1620612600 -0700

[scudo] Align objects with alignas

Operator new must align allocations for types with large alignment.

Before c++17 behavior was implementation defined and both clang and gc++
before 11 ignored alignment. Miss-aligned objects mysteriously crashed
tests on Ubuntu 14.

Alternatives are compile with -std=c++17 or -faligned-new, but they were
discarded as less portable.

Reviewed By: hctim

Differential Revision: https://reviews.llvm.org/D101874

GitOrigin-RevId: 1d767b13bfad806bf584e0b054eb7d00a494591d