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Fixing compressed singlefile scenario on osx-arm64 #79894

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Merged
merged 5 commits into from
Dec 23, 2022
Merged

Fixing compressed singlefile scenario on osx-arm64 #79894

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30e47bf
force 6.0 instead of 3.0 on osx-arm64
VSadov Dec 13, 2022
2c3840f
disable legacy test on osx-arm64
VSadov Dec 14, 2022
8fa04e5
fix osx-arm64 case
VSadov Dec 21, 2022
8939561
undo unnecessary change
VSadov Dec 21, 2022
3910401
use MEM_RESERVE_EXECUTABLE on HOST_UNIX
VSadov Dec 22, 2022
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use MEM_RESERVE_EXECUTABLE on HOST_UNIX
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@VSadov
VSadov committed Dec 22, 2022
commit 3910401baec3a692f44f400be28be4c045f8f24e
5 changes: 4 additions & 1 deletion src/coreclr/vm/peimagelayout.cpp
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Expand Up @@ -776,7 +776,10 @@ void* FlatImageLayout::LoadImageByCopyingParts(SIZE_T* m_imageParts) const
#endif // FEATURE_ENABLE_NO_ADDRESS_SPACE_RANDOMIZATION

DWORD allocationType = MEM_RESERVE | MEM_COMMIT;
#if defined(__APPLE__) && defined(HOST_ARM64)
#ifdef HOST_UNIX
// Tell PAL to use the executable memory allocator to satisfy this request for virtual memory.
// This is required on MacOS and otherwise will allow us to place native R2R code close to the
// coreclr library and thus improve performance by avoiding jump stubs in managed code.
allocationType |= MEM_RESERVE_EXECUTABLE;
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I would do this for HOST_UNIX in general like we do in the ExecutableAllocator::Reserve.

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That would cause that memory to be taken from the pre-reserved block in PAL that is close to the libcoreclr.so.

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Will it help R2R code in the same way as JITed code (making it closer to coreclr and avoiding stubs) ?

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Did not see you've answered this already.

#endif

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