1 /*
2  * Copyright (C) 2013 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include "allocator.h"
18 
19 #include <inttypes.h>
20 #include <stdlib.h>
21 
22 #include "atomic.h"
23 #include "base/logging.h"
24 #include "thread-inl.h"
25 
26 namespace art {
27 
28 Atomic<uint64_t> TrackedAllocators::bytes_used_[kAllocatorTagCount];
29 Atomic<uint64_t> TrackedAllocators::max_bytes_used_[kAllocatorTagCount];
30 Atomic<uint64_t> TrackedAllocators::total_bytes_used_[kAllocatorTagCount];
31 
32 class MallocAllocator : public Allocator {
33  public:
MallocAllocator()34   explicit MallocAllocator() {}
~MallocAllocator()35   ~MallocAllocator() {}
36 
Alloc(size_t size)37   virtual void* Alloc(size_t size) {
38     return calloc(sizeof(uint8_t), size);
39   }
40 
Free(void * p)41   virtual void Free(void* p) {
42     free(p);
43   }
44 
45  private:
46   DISALLOW_COPY_AND_ASSIGN(MallocAllocator);
47 };
48 
49 MallocAllocator g_malloc_allocator;
50 
51 class NoopAllocator : public Allocator {
52  public:
NoopAllocator()53   explicit NoopAllocator() {}
~NoopAllocator()54   ~NoopAllocator() {}
55 
Alloc(size_t size)56   virtual void* Alloc(size_t size) {
57     LOG(FATAL) << "NoopAllocator::Alloc should not be called";
58     return NULL;
59   }
60 
Free(void * p)61   virtual void Free(void* p) {
62     // Noop.
63   }
64 
65  private:
66   DISALLOW_COPY_AND_ASSIGN(NoopAllocator);
67 };
68 
69 NoopAllocator g_noop_allocator;
70 
GetMallocAllocator()71 Allocator* Allocator::GetMallocAllocator() {
72   return &g_malloc_allocator;
73 }
74 
GetNoopAllocator()75 Allocator* Allocator::GetNoopAllocator() {
76   return &g_noop_allocator;
77 }
78 
Dump(std::ostream & os)79 void TrackedAllocators::Dump(std::ostream& os) {
80   if (kEnableTrackingAllocator) {
81     os << "Dumping native memory usage\n";
82     for (size_t i = 0; i < kAllocatorTagCount; ++i) {
83       uint64_t bytes_used = bytes_used_[i].LoadRelaxed();
84       uint64_t max_bytes_used = max_bytes_used_[i].LoadRelaxed();
85       uint64_t total_bytes_used = total_bytes_used_[i].LoadRelaxed();
86       if (total_bytes_used != 0) {
87         os << static_cast<AllocatorTag>(i) << " active=" << bytes_used << " max="
88            << max_bytes_used << " total=" << total_bytes_used << "\n";
89       }
90     }
91   }
92 }
93 
94 }  // namespace art
95