#include "sanitizer_allocator.h"
-#if SANITIZER_WORDSIZE != 64
-# error "sanitizer_allocator64.h can only be used on 64-bit platforms"
-#endif
-
namespace __sanitizer {
+// SizeClassAllocator64 -- allocator for 64-bit address space.
+//
// Space: a portion of address space of kSpaceSize bytes starting at
// a fixed address (kSpaceBeg). Both constants are powers of two and
// kSpaceBeg is kSpaceSize-aligned.
static const uptr kNumClasses = SizeClassMap::kNumClasses; // 2^k <= 256
private:
+ static const uptr kRegionSize = kSpaceSize / kNumClasses;
COMPILER_CHECK(kSpaceBeg % kSpaceSize == 0);
COMPILER_CHECK(kNumClasses <= SizeClassMap::kNumClasses);
- static const uptr kRegionSize = kSpaceSize / kNumClasses;
- COMPILER_CHECK((kRegionSize >> 32) > 0); // kRegionSize must be >= 2^32.
+ // kRegionSize must be >= 2^32.
+ COMPILER_CHECK((kRegionSize) >= (1ULL << (SANITIZER_WORDSIZE / 2)));
// Populate the free list with at most this number of bytes at once
// or with one element if its size is greater.
static const uptr kPopulateSize = 1 << 18;