Diffusion FreeBSD src repository 133180557479

Avoid emitting popcnt in libclang_rt.fuzzer*.a if unsupported
133180557479
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Description

Avoid emitting popcnt in libclang_rt.fuzzer*.a if unsupported

Since popcnt is only supported by CPUTYPE=nehalem and later, ensure that
this instruction is only emitted when appropriate. Otherwise, programs
using the library can abort with SIGILL.

PR: 258156
Reported by: Eric Rucker <bhtooefr@bhtooefr.org>
MFC after: 3 days

Details

Provenance

dim	Authored on Dec 30 2021, 9:53 AM

Parents

rG841e0a87576b: uma: with KTR trace allocs/frees from SMR zones

Branches

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Tags

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Event Timeline

dim committed rG133180557479: Avoid emitting popcnt in libclang_rt.fuzzer*.a if unsupported (authored by dim).Dec 30 2021, 9:55 AM

dim mentioned this in rG802ff7fcee24: Avoid emitting popcnt in libclang_rt.fuzzer*.a if unsupported.Jan 2 2022, 12:02 PM

dim mentioned this in rG50b0f99010bc: Avoid emitting popcnt in libclang_rt.fuzzer*.a if unsupported.

Changes (1)

Path

Size

contrib/

llvm-project/

compiler-rt/

lib/

fuzzer/

FuzzerPlatform.h

rG133180557479

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contrib/llvm-project/compiler-rt/lib/fuzzer/FuzzerPlatform.h