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