[PATCH] D73750: [scudo][standalone] Change default Android config

[Kostya Kortchinsky via Phabricator via llvm-commits]

cryptoad created this revision.
Herald added projects: Sanitizers, LLVM.
Herald added subscribers: llvm-commits, Sanitizers.

This changes a couple of parameters in the default Android config to
address some performance and memory footprint issues (well to be closer
to the default Bionic allocator numbers).


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D73750

Files:
  compiler-rt/lib/scudo/standalone/allocator_config.h


Index: compiler-rt/lib/scudo/standalone/allocator_config.h
===================================================================
--- compiler-rt/lib/scudo/standalone/allocator_config.h
+++ compiler-rt/lib/scudo/standalone/allocator_config.h
@@ -44,10 +44,10 @@
                                /*MaySupportMemoryTagging=*/true>
       Primary;
 #else
-  // 512KB regions
-  typedef SizeClassAllocator32<SizeClassMap, 19U> Primary;
+  // 256KB regions
+  typedef SizeClassAllocator32<SizeClassMap, 18U> Primary;
 #endif
-  typedef MapAllocator<MapAllocatorCache<>> Secondary;
+  typedef MapAllocator<MapAllocatorCache<32U, 1UL << 21>> Secondary;
   template <class A>
   using TSDRegistryT = TSDRegistrySharedT<A, 2U>; // Shared, max 2 TSDs.
 };


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