| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef ART_COMPILER_DEX_ARENA_ALLOCATOR_H_ |
| #define ART_COMPILER_DEX_ARENA_ALLOCATOR_H_ |
| |
| #include <stdint.h> |
| #include <stddef.h> |
| #include "compiler_enums.h" |
| |
| namespace art { |
| |
| #define ARENA_DEFAULT_BLOCK_SIZE (256 * 1024) |
| #define ARENA_HIGH_WATER (16 * 1024) |
| |
| class ArenaAllocator { |
| public: |
| // Type of allocation for memory tuning. |
| enum ArenaAllocKind { |
| kAllocMisc, |
| kAllocBB, |
| kAllocLIR, |
| kAllocMIR, |
| kAllocDFInfo, |
| kAllocGrowableArray, |
| kAllocGrowableBitMap, |
| kAllocDalvikToSSAMap, |
| kAllocDebugInfo, |
| kAllocSuccessor, |
| kAllocRegAlloc, |
| kAllocData, |
| kAllocPredecessors, |
| kNumAllocKinds |
| }; |
| |
| explicit ArenaAllocator(size_t default_size = ARENA_DEFAULT_BLOCK_SIZE); |
| ~ArenaAllocator(); |
| void* NewMem(size_t size, bool zero, ArenaAllocKind kind); |
| size_t BytesAllocated() { |
| return malloc_bytes_; |
| } |
| |
| void DumpMemStats(std::ostream& os) const; |
| |
| private: |
| // Variable-length allocation block. |
| struct ArenaMemBlock { |
| size_t block_size; |
| size_t bytes_allocated; |
| ArenaMemBlock *next; |
| char ptr[0]; |
| }; |
| |
| ArenaMemBlock* EmptyArenaBlock(); |
| |
| size_t default_size_; // Smallest size of new allocation block. |
| size_t block_size_; // Amount of allocatable bytes on a default block. |
| ArenaMemBlock* arena_head_; // Head of linked list of allocation blocks. |
| ArenaMemBlock* current_block_; // NOTE: code assumes there's always at least 1 block. |
| int num_arena_blocks_; |
| uint32_t malloc_bytes_; // Number of actual bytes malloc'd |
| uint32_t alloc_stats_[kNumAllocKinds]; // Bytes used by various allocation kinds. |
| uint32_t lost_bytes_; // Lost memory at end of too-small region |
| uint32_t num_allocations_; |
| }; // ArenaAllocator |
| |
| |
| struct MemStats { |
| public: |
| void Dump(std::ostream& os) const { |
| arena_.DumpMemStats(os); |
| } |
| explicit MemStats(const ArenaAllocator &arena) : arena_(arena) {} |
| private: |
| const ArenaAllocator &arena_; |
| }; // MemStats |
| |
| } // namespace art |
| |
| #endif // ART_COMPILER_DEX_ARENA_ALLOCATOR_H_ |