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Commit 2ce42e0a authored by Kostya Serebryany's avatar Kostya Serebryany
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[sanitizer] change the way SizeClassAllocator64 allocated memory from the... 

[sanitizer] change the way SizeClassAllocator64 allocated memory from the system: instead of one huge mmap(NORESERVE) it does one huge mprotect and then does small on-demand mmaps. This allows us to call OnMap callbacks which are required to poison newly allocated memory in asan

llvm-svn: 170097
parent 0f207eda
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