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Do not use ExecutableMemoryAllocator on 64 bit platforms if default base address usage is requested #70563

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Jun 14, 2022
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Do not use ExecutableMemoryAllocator on 64 bit platforms if default base address usage is requested #70563

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8 changes: 7 additions & 1 deletion src/coreclr/pal/src/map/map.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2284,7 +2284,13 @@ void * MAPMapPEFile(HANDLE hFile, off_t offset)
// more efficient code (by avoiding usage of jump stubs). Alignment to a 64 KB granularity should
// not be necessary (alignment to page size should be sufficient), but see
// ExecutableMemoryAllocator::AllocateMemory() for the reason why it is done.
loadedBase = ReserveMemoryFromExecutableAllocator(pThread, ALIGN_UP(reserveSize, VIRTUAL_64KB));

#ifdef FEATURE_ENABLE_NO_ADDRESS_SPACE_RANDOMIZATION
if (!g_useDefaultBaseAddr)
#endif // FEATURE_ENABLE_NO_ADDRESS_SPACE_RANDOMIZATION
{
loadedBase = ReserveMemoryFromExecutableAllocator(pThread, ALIGN_UP(reserveSize, VIRTUAL_64KB));
}
#endif // HOST_64BIT

if (loadedBase == NULL)
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