[libc-commits] [PATCH] D157247: [test][libc] Fix aligned_alloc argument

[Vitaly Buka via Phabricator via libc-commits]

vitalybuka created this revision.
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Size must be multiple of Alignment.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D157247

Files:
  libc/benchmarks/LibcMemoryBenchmark.h


Index: libc/benchmarks/LibcMemoryBenchmark.h
===================================================================
--- libc/benchmarks/LibcMemoryBenchmark.h
+++ libc/benchmarks/LibcMemoryBenchmark.h
@@ -107,11 +107,11 @@
   size_t Size = 0;
 
 public:
-  // Note: msan / asan can't handle Alignment > 512.
   static constexpr size_t Alignment = 512;
 
   explicit AlignedBuffer(size_t Size)
-      : Buffer(static_cast<char *>(aligned_alloc(Alignment, Size))),
+      : Buffer(static_cast<char *>(aligned_alloc(
+            Alignment, (Size + Alignment - 1) / Alignment * Alignment))),
         Size(Size) {}
   ~AlignedBuffer() { free(Buffer); }
 


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