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W^X support #54954
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Merged
W^X support #54954
Commits on Jun 30, 2021
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This change is the last part of enabling the W^X support. It adds the actual executable allocator that handles all double mapped memory allocations and creating the writeable mappings. The platform specific functionality is placed in a new minipal that is going to be a basis for future removal of Windows APIs usage from the native runtime. The last state of the change was tested on all the platforms that we support using coreclr pri 1 tests with both the W^X enabled and disabled using the COMPlus_EnableWXORX variable. The debugger changes were tested using the managed debugger testing suite on Windows x64, x86 and on Apple Silicon so far. Further testing on other platforms is in progress.
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The memfd_create was introduced in 13.0 and it is equivalent to the shm_open(SHM_ANON, ...)
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Commits on Jul 8, 2021
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Commits on Jul 9, 2021
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Replace LeafLock in UMEntryThunkFreeList by a new lock
Also update the ordering list of the ExecutableAllocatorLock
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Commits on Jul 10, 2021
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Fix ARM write barrier icache flushing
Also allocate LoaderHeapFreeBlock from regular heap.
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Commits on Jul 11, 2021
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