/*
* 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_RUNTIME_GC_SPACE_ROSALLOC_SPACE_H_
#define ART_RUNTIME_GC_SPACE_ROSALLOC_SPACE_H_
#include "gc/allocator/rosalloc.h"
#include "malloc_space.h"
#include "space.h"
namespace art {
namespace gc {
namespace collector {
class MarkSweep;
} // namespace collector
namespace space {
// An alloc space implemented using a runs-of-slots memory allocator. Not final as may be
// overridden by a MemoryToolMallocSpace.
class RosAllocSpace : public MallocSpace {
public:
// Create a RosAllocSpace with the requested sizes. The requested
// base address is not guaranteed to be granted, if it is required,
// the caller should call Begin on the returned space to confirm the
// request was granted.
static RosAllocSpace* Create(const std::string& name,
size_t initial_size,
size_t growth_limit,
size_t capacity,
bool low_memory_mode,
bool can_move_objects);
static RosAllocSpace* CreateFromMemMap(MemMap&& mem_map,
const std::string& name,
size_t starting_size,
size_t initial_size,
size_t growth_limit,
size_t capacity,
bool low_memory_mode,
bool can_move_objects);
mirror::Object* AllocWithGrowth(Thread* self, size_t num_bytes, size_t* bytes_allocated,
size_t* usable_size, size_t* bytes_tl_bulk_allocated)
override REQUIRES(!lock_);
mirror::Object* Alloc(Thread* self, size_t num_bytes, size_t* bytes_allocated,
size_t* usable_size, size_t* bytes_tl_bulk_allocated) override {
return AllocNonvirtual(self, num_bytes, bytes_allocated, usable_size,
bytes_tl_bulk_allocated);
}
mirror::Object* AllocThreadUnsafe(Thread* self, size_t num_bytes, size_t* bytes_allocated,
size_t* usable_size, size_t* bytes_tl_bulk_allocated)
override REQUIRES(Locks::mutator_lock_) {
return AllocNonvirtualThreadUnsafe(self, num_bytes, bytes_allocated, usable_size,
bytes_tl_bulk_allocated);
}
size_t AllocationSize(mirror::Object* obj, size_t* usable_size) override {
return AllocationSizeNonvirtual<true>(obj, usable_size);
}
size_t Free(Thread* self, mirror::Object* ptr) override
REQUIRES_SHARED(Locks::mutator_lock_);
size_t FreeList(Thread* self, size_t num_ptrs, mirror::Object** ptrs) override
REQUIRES_SHARED(Locks::mutator_lock_);
mirror::Object* AllocNonvirtual(Thread* self, size_t num_bytes, size_t* bytes_allocated,
size_t* usable_size, size_t* bytes_tl_bulk_allocated) {
// RosAlloc zeroes memory internally.
return AllocCommon(self, num_bytes, bytes_allocated, usable_size,
bytes_tl_bulk_allocated);
}
mirror::Object* AllocNonvirtualThreadUnsafe(Thread* self, size_t num_bytes,
size_t* bytes_allocated, size_t* usable_size,
size_t* bytes_tl_bulk_allocated) {
// RosAlloc zeroes memory internally. Pass in false for thread unsafe.
return AllocCommon<false>(self, num_bytes, bytes_allocated, usable_size,
bytes_tl_bulk_allocated);
}
// Returns true if the given allocation request can be allocated in
// an existing thread local run without allocating a new run.
ALWAYS_INLINE bool CanAllocThreadLocal(Thread* self, size_t num_bytes);
// Allocate the given allocation request in an existing thread local
// run without allocating a new run.
ALWAYS_INLINE mirror::Object* AllocThreadLocal(Thread* self, size_t num_bytes,
size_t* bytes_allocated);
size_t MaxBytesBulkAllocatedFor(size_t num_bytes) override {
return MaxBytesBulkAllocatedForNonvirtual(num_bytes);
}
ALWAYS_INLINE size_t MaxBytesBulkAllocatedForNonvirtual(size_t num_bytes);
// TODO: NO_THREAD_SAFETY_ANALYSIS because SizeOf() requires that mutator_lock is held.
template<bool kMaybeIsRunningOnMemoryTool>
size_t AllocationSizeNonvirtual(mirror::Object* obj, size_t* usable_size)
NO_THREAD_SAFETY_ANALYSIS;
allocator::RosAlloc* GetRosAlloc() const {
return rosalloc_;
}
size_t Trim() override;
void Walk(WalkCallback callback, void* arg) override REQUIRES(!lock_);
size_t GetFootprint() override;
size_t GetFootprintLimit() override;
void SetFootprintLimit(size_t limit) override;
void Clear() override;
MallocSpace* CreateInstance(MemMap&& mem_map,
const std::string& name,
void* allocator,
uint8_t* begin,
uint8_t* end,
uint8_t* limit,
size_t growth_limit,
bool can_move_objects) override;
uint64_t GetBytesAllocated() override;
uint64_t GetObjectsAllocated() override;
size_t RevokeThreadLocalBuffers(Thread* thread) override;
size_t RevokeAllThreadLocalBuffers() override;
void AssertThreadLocalBuffersAreRevoked(Thread* thread);
void AssertAllThreadLocalBuffersAreRevoked();
// Returns the class of a recently freed object.
mirror::Class* FindRecentFreedObject(const mirror::Object* obj);
bool IsRosAllocSpace() const override {
return true;
}
RosAllocSpace* AsRosAllocSpace() override {
return this;
}
void Verify() REQUIRES(Locks::mutator_lock_) {
rosalloc_->Verify();
}
virtual ~RosAllocSpace();
void LogFragmentationAllocFailure(std::ostream& os, size_t failed_alloc_bytes) override {
rosalloc_->LogFragmentationAllocFailure(os, failed_alloc_bytes);
}
void DumpStats(std::ostream& os);
protected:
RosAllocSpace(MemMap&& mem_map,
size_t initial_size,
const std::string& name,
allocator::RosAlloc* rosalloc,
uint8_t* begin,
uint8_t* end,
uint8_t* limit,
size_t growth_limit,
bool can_move_objects,
size_t starting_size,
bool low_memory_mode);
private:
template<bool kThreadSafe = true>
mirror::Object* AllocCommon(Thread* self, size_t num_bytes, size_t* bytes_allocated,
size_t* usable_size, size_t* bytes_tl_bulk_allocated);
void* CreateAllocator(void* base, size_t morecore_start, size_t initial_size,
size_t maximum_size, bool low_memory_mode) override {
return CreateRosAlloc(
base, morecore_start, initial_size, maximum_size, low_memory_mode, kRunningOnMemoryTool);
}
static allocator::RosAlloc* CreateRosAlloc(void* base, size_t morecore_start, size_t initial_size,
size_t maximum_size, bool low_memory_mode,
bool running_on_memory_tool);
void InspectAllRosAlloc(void (*callback)(void *start, void *end, size_t num_bytes, void* callback_arg),
void* arg, bool do_null_callback_at_end)
REQUIRES(!Locks::runtime_shutdown_lock_, !Locks::thread_list_lock_);
void InspectAllRosAllocWithSuspendAll(
void (*callback)(void *start, void *end, size_t num_bytes, void* callback_arg),
void* arg, bool do_null_callback_at_end)
REQUIRES(!Locks::runtime_shutdown_lock_, !Locks::thread_list_lock_);
// Underlying rosalloc.
allocator::RosAlloc* rosalloc_;
const bool low_memory_mode_;
friend class collector::MarkSweep;
DISALLOW_COPY_AND_ASSIGN(RosAllocSpace);
};
} // namespace space
} // namespace gc
} // namespace art
#endif // ART_RUNTIME_GC_SPACE_ROSALLOC_SPACE_H_