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//===-- sanitizer_allocator_internal.h -------------------------- C++ -----===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This allocator is used inside run-times.
//
//===----------------------------------------------------------------------===//
#ifndef SANITIZER_ALLOCATOR_INTERNAL_H
#define SANITIZER_ALLOCATOR_INTERNAL_H
#include "sanitizer_allocator.h"
#include "sanitizer_internal_defs.h"
namespace __sanitizer {
// FIXME: Check if we may use even more compact size class map for internal
// purposes.
typedef CompactSizeClassMap InternalSizeClassMap;
static const uptr kInternalAllocatorSpace = 0;
static const u64 kInternalAllocatorSize = SANITIZER_MMAP_RANGE_SIZE;
#if SANITIZER_WORDSIZE == 32
static const uptr kInternalAllocatorRegionSizeLog = 20;
static const uptr kInternalAllocatorNumRegions =
kInternalAllocatorSize >> kInternalAllocatorRegionSizeLog;
typedef FlatByteMap<kInternalAllocatorNumRegions> ByteMap;
#else
static const uptr kInternalAllocatorRegionSizeLog = 24;
static const uptr kInternalAllocatorNumRegions =
kInternalAllocatorSize >> kInternalAllocatorRegionSizeLog;
typedef TwoLevelByteMap<(kInternalAllocatorNumRegions >> 12), 1 << 12> ByteMap;
#endif
typedef SizeClassAllocator32<
kInternalAllocatorSpace, kInternalAllocatorSize, 16, InternalSizeClassMap,
kInternalAllocatorRegionSizeLog, ByteMap> PrimaryInternalAllocator;
typedef SizeClassAllocatorLocalCache<PrimaryInternalAllocator>
InternalAllocatorCache;
// We don't want our internal allocator to do any map/unmap operations from
// LargeMmapAllocator.
struct CrashOnMapUnmap {
void OnMap(uptr p, uptr size) const {
RAW_CHECK_MSG(0, "Unexpected mmap in InternalAllocator!\n");
}
void OnUnmap(uptr p, uptr size) const {
RAW_CHECK_MSG(0, "Unexpected munmap in InternalAllocator!\n");
}
};
typedef CombinedAllocator<PrimaryInternalAllocator, InternalAllocatorCache,
LargeMmapAllocator<CrashOnMapUnmap> >
InternalAllocator;
void *InternalAlloc(uptr size, InternalAllocatorCache *cache = 0);
void InternalFree(void *p, InternalAllocatorCache *cache = 0);
InternalAllocator *internal_allocator();
} // namespace __sanitizer
#endif // SANITIZER_ALLOCATOR_INTERNAL_H
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