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//===--- Allocator.cpp - Simple memory allocation abstraction -------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements the BumpPtrAllocator interface.
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/Allocator.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/DataTypes.h"
#include "llvm/Support/Memory.h"
#include "llvm/Support/Recycler.h"
#include "llvm/Support/raw_ostream.h"
#include <cstring>
namespace llvm {
SlabAllocator::~SlabAllocator() { }
MallocSlabAllocator::~MallocSlabAllocator() { }
MemSlab *MallocSlabAllocator::Allocate(size_t Size) {
MemSlab *Slab = (MemSlab*)Allocator.Allocate(Size, 0);
Slab->Size = Size;
Slab->NextPtr = nullptr;
return Slab;
}
void MallocSlabAllocator::Deallocate(MemSlab *Slab) {
Allocator.Deallocate(Slab);
}
void BumpPtrAllocatorBase::PrintStats() const {
unsigned NumSlabs = 0;
size_t TotalMemory = 0;
for (MemSlab *Slab = CurSlab; Slab; Slab = Slab->NextPtr) {
TotalMemory += Slab->Size;
++NumSlabs;
}
errs() << "\nNumber of memory regions: " << NumSlabs << '\n'
<< "Bytes used: " << BytesAllocated << '\n'
<< "Bytes allocated: " << TotalMemory << '\n'
<< "Bytes wasted: " << (TotalMemory - BytesAllocated)
<< " (includes alignment, etc)\n";
}
size_t BumpPtrAllocatorBase::getTotalMemory() const {
size_t TotalMemory = 0;
for (MemSlab *Slab = CurSlab; Slab; Slab = Slab->NextPtr) {
TotalMemory += Slab->Size;
}
return TotalMemory;
}
void PrintRecyclerStats(size_t Size,
size_t Align,
size_t FreeListSize) {
errs() << "Recycler element size: " << Size << '\n'
<< "Recycler element alignment: " << Align << '\n'
<< "Number of elements free for recycling: " << FreeListSize << '\n';
}
}
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