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/*
* 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.
*/
#include "allocator.h"
#include <inttypes.h>
#include <stdlib.h>
#include "atomic.h"
#include "base/logging.h"
namespace art {
class MallocAllocator FINAL : public Allocator {
public:
explicit MallocAllocator() {}
~MallocAllocator() {}
void* Alloc(size_t size) {
return calloc(sizeof(uint8_t), size);
}
void Free(void* p) {
free(p);
}
private:
DISALLOW_COPY_AND_ASSIGN(MallocAllocator);
};
MallocAllocator g_malloc_allocator;
class NoopAllocator FINAL : public Allocator {
public:
explicit NoopAllocator() {}
~NoopAllocator() {}
void* Alloc(size_t size ATTRIBUTE_UNUSED) {
LOG(FATAL) << "NoopAllocator::Alloc should not be called";
UNREACHABLE();
}
void Free(void* p ATTRIBUTE_UNUSED) {
// Noop.
}
private:
DISALLOW_COPY_AND_ASSIGN(NoopAllocator);
};
NoopAllocator g_noop_allocator;
Allocator* Allocator::GetMallocAllocator() {
return &g_malloc_allocator;
}
Allocator* Allocator::GetNoopAllocator() {
return &g_noop_allocator;
}
namespace TrackedAllocators {
// These globals are safe since they don't have any non-trivial destructors.
Atomic<size_t> g_bytes_used[kAllocatorTagCount];
volatile size_t g_max_bytes_used[kAllocatorTagCount];
Atomic<uint64_t> g_total_bytes_used[kAllocatorTagCount];
void Dump(std::ostream& os) {
if (kEnableTrackingAllocator) {
os << "Dumping native memory usage\n";
for (size_t i = 0; i < kAllocatorTagCount; ++i) {
uint64_t bytes_used = g_bytes_used[i].LoadRelaxed();
uint64_t max_bytes_used = g_max_bytes_used[i];
uint64_t total_bytes_used = g_total_bytes_used[i].LoadRelaxed();
if (total_bytes_used != 0) {
os << static_cast<AllocatorTag>(i) << " active=" << bytes_used << " max="
<< max_bytes_used << " total=" << total_bytes_used << "\n";
}
}
}
}
} // namespace TrackedAllocators
} // namespace art