runtime/gc/space/space_test.h - LeafOS-Project/android_art - Gitiles

 /*
  * Copyright (C) 2011 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_SPACE_TEST_H_
 #define ART_RUNTIME_GC_SPACE_SPACE_TEST_H_

 #include <stdint.h>
 #include <memory>

 #include "base/globals.h"
 #include "common_runtime_test.h"
 #include "mirror/array-inl.h"
 #include "mirror/class-inl.h"
 #include "mirror/class_loader.h"
 #include "mirror/object-inl.h"
 #include "scoped_thread_state_change-inl.h"
 #include "thread_list.h"
 #include "zygote_space.h"

 namespace art {
 namespace gc {
 namespace space {

 template <class Super>
 class SpaceTest : public Super {
  public:
   jobject byte_array_class_ = nullptr;

   void AddSpace(ContinuousSpace* space, bool revoke = true) {
     Heap* heap = Runtime::Current()->GetHeap();
     if (revoke) {
       heap->RevokeAllThreadLocalBuffers();
     }
     {
       ScopedThreadStateChange sts(Thread::Current(), kSuspended);
       ScopedSuspendAll ssa("Add image space");
       heap->AddSpace(space);
     }
     heap->SetSpaceAsDefault(space);
   }

   mirror::Class* GetByteArrayClass(Thread* self) REQUIRES_SHARED(Locks::mutator_lock_) {
     StackHandleScope<1> hs(self);
     auto null_loader(hs.NewHandle<mirror::ClassLoader>(nullptr));
     if (byte_array_class_ == nullptr) {
       mirror::Class* byte_array_class =
           Runtime::Current()->GetClassLinker()->FindClass(self, "[B", null_loader);
       EXPECT_TRUE(byte_array_class != nullptr);
       byte_array_class_ = self->GetJniEnv()->NewLocalRef(byte_array_class);
       EXPECT_TRUE(byte_array_class_ != nullptr);
     }
     return self->DecodeJObject(byte_array_class_)->AsClass();
   }

   mirror::Object* Alloc(space::MallocSpace* alloc_space,
                         Thread* self,
                         size_t bytes,
                         size_t* bytes_allocated,
                         size_t* usable_size,
                         size_t* bytes_tl_bulk_allocated)
       REQUIRES_SHARED(Locks::mutator_lock_) {
     StackHandleScope<1> hs(self);
     Handle<mirror::Class> byte_array_class(hs.NewHandle(GetByteArrayClass(self)));
     mirror::Object* obj = alloc_space->Alloc(self,
                                              bytes,
                                              bytes_allocated,
                                              usable_size,
                                              bytes_tl_bulk_allocated);
     if (obj != nullptr) {
       InstallClass(obj, byte_array_class.Get(), bytes);
     }
     return obj;
   }

   mirror::Object* AllocWithGrowth(space::MallocSpace* alloc_space,
                                   Thread* self,
                                   size_t bytes,
                                   size_t* bytes_allocated,
                                   size_t* usable_size,
                                   size_t* bytes_tl_bulk_allocated)
       REQUIRES_SHARED(Locks::mutator_lock_) {
     StackHandleScope<1> hs(self);
     Handle<mirror::Class> byte_array_class(hs.NewHandle(GetByteArrayClass(self)));
     mirror::Object* obj = alloc_space->AllocWithGrowth(self, bytes, bytes_allocated, usable_size,
                                                        bytes_tl_bulk_allocated);
     if (obj != nullptr) {
       InstallClass(obj, byte_array_class.Get(), bytes);
     }
     return obj;
   }

   void InstallClass(mirror::Object* o, mirror::Class* byte_array_class, size_t size)
       REQUIRES_SHARED(Locks::mutator_lock_) {
     // Note the minimum size, which is the size of a zero-length byte array.
     EXPECT_GE(size, SizeOfZeroLengthByteArray());
     EXPECT_TRUE(byte_array_class != nullptr);
     o->SetClass(byte_array_class);
     if (kUseBakerReadBarrier) {
       // Like the proper heap object allocation, install and verify
       // the correct read barrier state.
       o->AssertReadBarrierState();
     }
     mirror::Array* arr = o->AsArray<kVerifyNone>();
     size_t header_size = SizeOfZeroLengthByteArray();
     int32_t length = size - header_size;
     arr->SetLength(length);
     EXPECT_EQ(arr->SizeOf<kVerifyNone>(), size);
   }

   static size_t SizeOfZeroLengthByteArray() {
     return mirror::Array::DataOffset(Primitive::ComponentSize(Primitive::kPrimByte)).Uint32Value();
   }

   typedef MallocSpace* (*CreateSpaceFn)(const std::string& name, size_t initial_size, size_t growth_limit,
                                         size_t capacity, uint8_t* requested_begin);

   void SizeFootPrintGrowthLimitAndTrimBody(MallocSpace* space, intptr_t object_size,
                                            int round, size_t growth_limit);
   void SizeFootPrintGrowthLimitAndTrimDriver(size_t object_size, CreateSpaceFn create_space);
 };

 static inline size_t test_rand(size_t* seed) {
   *seed = *seed * 1103515245 + 12345;
   return *seed;
 }

 template <class Super>
 void SpaceTest<Super>::SizeFootPrintGrowthLimitAndTrimBody(MallocSpace* space,
                                                            intptr_t object_size,
                                                            int round,
                                                            size_t growth_limit) {
   if (((object_size > 0 && object_size >= static_cast<intptr_t>(growth_limit))) ||
       ((object_size < 0 && -object_size >= static_cast<intptr_t>(growth_limit)))) {
     // No allocation can succeed
     return;
   }

   // The space's footprint equals amount of resources requested from system
   size_t footprint = space->GetFootprint();

   // The space must at least have its book keeping allocated
   EXPECT_GT(footprint, 0u);

   // But it shouldn't exceed the initial size
   EXPECT_LE(footprint, growth_limit);

   // space's size shouldn't exceed the initial size
   EXPECT_LE(space->Size(), growth_limit);

   // this invariant should always hold or else the space has grown to be larger than what the
   // space believes its size is (which will break invariants)
   EXPECT_GE(space->Size(), footprint);

   // Fill the space with lots of small objects up to the growth limit
   size_t max_objects = (growth_limit / (object_size > 0 ? object_size : 8)) + 1;
   std::unique_ptr<mirror::Object*[]> lots_of_objects(new mirror::Object*[max_objects]);
   size_t last_object = 0;  // last object for which allocation succeeded
   size_t amount_allocated = 0;  // amount of space allocated
   Thread* self = Thread::Current();
   ScopedObjectAccess soa(self);
   size_t rand_seed = 123456789;
   for (size_t i = 0; i < max_objects; i++) {
     size_t alloc_fails = 0;  // number of failed allocations
     size_t max_fails = 30;  // number of times we fail allocation before giving up
     for (; alloc_fails < max_fails; alloc_fails++) {
       size_t alloc_size;
       if (object_size > 0) {
         alloc_size = object_size;
       } else {
         alloc_size = test_rand(&rand_seed) % static_cast<size_t>(-object_size);
         // Note the minimum size, which is the size of a zero-length byte array.
         size_t size_of_zero_length_byte_array = SizeOfZeroLengthByteArray();
         if (alloc_size < size_of_zero_length_byte_array) {
           alloc_size = size_of_zero_length_byte_array;
         }
       }
       StackHandleScope<1> hs(soa.Self());
       auto object(hs.NewHandle<mirror::Object>(nullptr));
       size_t bytes_allocated = 0;
       size_t bytes_tl_bulk_allocated;
       if (round <= 1) {
         object.Assign(Alloc(space, self, alloc_size, &bytes_allocated, nullptr,
                             &bytes_tl_bulk_allocated));
       } else {
         object.Assign(AllocWithGrowth(space, self, alloc_size, &bytes_allocated, nullptr,
                                       &bytes_tl_bulk_allocated));
       }
       footprint = space->GetFootprint();
       EXPECT_GE(space->Size(), footprint);  // invariant
       if (object != nullptr) {  // allocation succeeded
         lots_of_objects[i] = object.Get();
         size_t allocation_size = space->AllocationSize(object.Get(), nullptr);
         EXPECT_EQ(bytes_allocated, allocation_size);
         if (object_size > 0) {
           EXPECT_GE(allocation_size, static_cast<size_t>(object_size));
         } else {
           EXPECT_GE(allocation_size, 8u);
         }
         EXPECT_TRUE(bytes_tl_bulk_allocated == 0 ||
                     bytes_tl_bulk_allocated >= allocation_size);
         amount_allocated += allocation_size;
         break;
       }
     }
     if (alloc_fails == max_fails) {
       last_object = i;
       break;
     }
   }
   CHECK_NE(last_object, 0u);  // we should have filled the space
   EXPECT_GT(amount_allocated, 0u);

   // We shouldn't have gone past the growth_limit
   EXPECT_LE(amount_allocated, growth_limit);
   EXPECT_LE(footprint, growth_limit);
   EXPECT_LE(space->Size(), growth_limit);

   // footprint and size should agree with amount allocated
   EXPECT_GE(footprint, amount_allocated);
   EXPECT_GE(space->Size(), amount_allocated);

   // Release storage in a semi-adhoc manner
   size_t free_increment = 96;
   while (true) {
     {
       ScopedThreadStateChange tsc(self, kNative);
       // Give the space a haircut.
       space->Trim();
     }

     // Bounds sanity
     footprint = space->GetFootprint();
     EXPECT_LE(amount_allocated, growth_limit);
     EXPECT_GE(footprint, amount_allocated);
     EXPECT_LE(footprint, growth_limit);
     EXPECT_GE(space->Size(), amount_allocated);
     EXPECT_LE(space->Size(), growth_limit);

     if (free_increment == 0) {
       break;
     }

     // Free some objects
     for (size_t i = 0; i < last_object; i += free_increment) {
       mirror::Object* object = lots_of_objects.get()[i];
       if (object == nullptr) {
         continue;
       }
       size_t allocation_size = space->AllocationSize(object, nullptr);
       if (object_size > 0) {
         EXPECT_GE(allocation_size, static_cast<size_t>(object_size));
       } else {
         EXPECT_GE(allocation_size, 8u);
       }
       space->Free(self, object);
       lots_of_objects.get()[i] = nullptr;
       amount_allocated -= allocation_size;
       footprint = space->GetFootprint();
       EXPECT_GE(space->Size(), footprint);  // invariant
     }

     free_increment >>= 1;
   }

   // The space has become empty here before allocating a large object
   // below. For RosAlloc, revoke thread-local runs, which are kept
   // even when empty for a performance reason, so that they won't
   // cause the following large object allocation to fail due to
   // potential fragmentation. Note they are normally revoked at each
   // GC (but no GC here.)
   space->RevokeAllThreadLocalBuffers();

   // All memory was released, try a large allocation to check freed memory is being coalesced
   StackHandleScope<1> hs(soa.Self());
   auto large_object(hs.NewHandle<mirror::Object>(nullptr));
   size_t three_quarters_space = (growth_limit / 2) + (growth_limit / 4);
   size_t bytes_allocated = 0;
   size_t bytes_tl_bulk_allocated;
   if (round <= 1) {
     large_object.Assign(Alloc(space, self, three_quarters_space, &bytes_allocated, nullptr,
                               &bytes_tl_bulk_allocated));
   } else {
     large_object.Assign(AllocWithGrowth(space, self, three_quarters_space, &bytes_allocated,
                                         nullptr, &bytes_tl_bulk_allocated));
   }
   EXPECT_TRUE(large_object != nullptr);

   // Sanity check footprint
   footprint = space->GetFootprint();
   EXPECT_LE(footprint, growth_limit);
   EXPECT_GE(space->Size(), footprint);
   EXPECT_LE(space->Size(), growth_limit);

   // Clean up
   space->Free(self, large_object.Assign(nullptr));

   // Sanity check footprint
   footprint = space->GetFootprint();
   EXPECT_LE(footprint, growth_limit);
   EXPECT_GE(space->Size(), footprint);
   EXPECT_LE(space->Size(), growth_limit);
 }

 template <class Super>
 void SpaceTest<Super>::SizeFootPrintGrowthLimitAndTrimDriver(size_t object_size,
                                                              CreateSpaceFn create_space) {
   if (object_size < SizeOfZeroLengthByteArray()) {
     // Too small for the object layout/model.
     return;
   }
   size_t initial_size = 4 * MB;
   size_t growth_limit = 8 * MB;
   size_t capacity = 16 * MB;
   MallocSpace* space(create_space("test", initial_size, growth_limit, capacity, nullptr));
   ASSERT_TRUE(space != nullptr);

   // Basic sanity
   EXPECT_EQ(space->Capacity(), growth_limit);
   EXPECT_EQ(space->NonGrowthLimitCapacity(), capacity);

   // Make space findable to the heap, will also delete space when runtime is cleaned up
   AddSpace(space);

   // In this round we don't allocate with growth and therefore can't grow past the initial size.
   // This effectively makes the growth_limit the initial_size, so assert this.
   SizeFootPrintGrowthLimitAndTrimBody(space, object_size, 1, initial_size);
   SizeFootPrintGrowthLimitAndTrimBody(space, object_size, 2, growth_limit);
   // Remove growth limit
   space->ClearGrowthLimit();
   EXPECT_EQ(space->Capacity(), capacity);
   SizeFootPrintGrowthLimitAndTrimBody(space, object_size, 3, capacity);
 }

 #define TEST_SizeFootPrintGrowthLimitAndTrimStatic(name, spaceName, spaceFn, size) \
   TEST_F(spaceName##StaticTest, SizeFootPrintGrowthLimitAndTrim_AllocationsOf_##name) { \
     SizeFootPrintGrowthLimitAndTrimDriver(size, spaceFn); \
   }

 #define TEST_SizeFootPrintGrowthLimitAndTrimRandom(name, spaceName, spaceFn, size) \
   TEST_F(spaceName##RandomTest, SizeFootPrintGrowthLimitAndTrim_RandomAllocationsWithMax_##name) { \
     SizeFootPrintGrowthLimitAndTrimDriver(-(size), spaceFn); \
   }

 #define TEST_SPACE_CREATE_FN_STATIC(spaceName, spaceFn) \
   class spaceName##StaticTest : public SpaceTest<CommonRuntimeTest> { \
   }; \
   \
   TEST_SizeFootPrintGrowthLimitAndTrimStatic(12B, spaceName, spaceFn, 12) \
   TEST_SizeFootPrintGrowthLimitAndTrimStatic(16B, spaceName, spaceFn, 16) \
   TEST_SizeFootPrintGrowthLimitAndTrimStatic(24B, spaceName, spaceFn, 24) \
   TEST_SizeFootPrintGrowthLimitAndTrimStatic(32B, spaceName, spaceFn, 32) \
   TEST_SizeFootPrintGrowthLimitAndTrimStatic(64B, spaceName, spaceFn, 64) \
   TEST_SizeFootPrintGrowthLimitAndTrimStatic(128B, spaceName, spaceFn, 128) \
   TEST_SizeFootPrintGrowthLimitAndTrimStatic(1KB, spaceName, spaceFn, 1 * KB) \
   TEST_SizeFootPrintGrowthLimitAndTrimStatic(4KB, spaceName, spaceFn, 4 * KB) \
   TEST_SizeFootPrintGrowthLimitAndTrimStatic(1MB, spaceName, spaceFn, 1 * MB) \
   TEST_SizeFootPrintGrowthLimitAndTrimStatic(4MB, spaceName, spaceFn, 4 * MB) \
   TEST_SizeFootPrintGrowthLimitAndTrimStatic(8MB, spaceName, spaceFn, 8 * MB)

 #define TEST_SPACE_CREATE_FN_RANDOM(spaceName, spaceFn) \
   class spaceName##RandomTest : public SpaceTest<CommonRuntimeTest> { \
   }; \
   \
   TEST_SizeFootPrintGrowthLimitAndTrimRandom(16B, spaceName, spaceFn, 16) \
   TEST_SizeFootPrintGrowthLimitAndTrimRandom(24B, spaceName, spaceFn, 24) \
   TEST_SizeFootPrintGrowthLimitAndTrimRandom(32B, spaceName, spaceFn, 32) \
   TEST_SizeFootPrintGrowthLimitAndTrimRandom(64B, spaceName, spaceFn, 64) \
   TEST_SizeFootPrintGrowthLimitAndTrimRandom(128B, spaceName, spaceFn, 128) \
   TEST_SizeFootPrintGrowthLimitAndTrimRandom(1KB, spaceName, spaceFn, 1 * KB) \
   TEST_SizeFootPrintGrowthLimitAndTrimRandom(4KB, spaceName, spaceFn, 4 * KB) \
   TEST_SizeFootPrintGrowthLimitAndTrimRandom(1MB, spaceName, spaceFn, 1 * MB) \
   TEST_SizeFootPrintGrowthLimitAndTrimRandom(4MB, spaceName, spaceFn, 4 * MB) \
   TEST_SizeFootPrintGrowthLimitAndTrimRandom(8MB, spaceName, spaceFn, 8 * MB)

 }  // namespace space
 }  // namespace gc
 }  // namespace art

 #endif  // ART_RUNTIME_GC_SPACE_SPACE_TEST_H_
	/*
	* Copyright (C) 2011 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_SPACE_TEST_H_
	#define ART_RUNTIME_GC_SPACE_SPACE_TEST_H_

	#include <stdint.h>
	#include <memory>

	#include "base/globals.h"
	#include "common_runtime_test.h"
	#include "mirror/array-inl.h"
	#include "mirror/class-inl.h"
	#include "mirror/class_loader.h"
	#include "mirror/object-inl.h"
	#include "scoped_thread_state_change-inl.h"
	#include "thread_list.h"
	#include "zygote_space.h"

	namespace art {
	namespace gc {
	namespace space {

	template <class Super>
	class SpaceTest : public Super {
	public:
	jobject byte_array_class_ = nullptr;

	void AddSpace(ContinuousSpace* space, bool revoke = true) {
	Heap* heap = Runtime::Current()->GetHeap();
	if (revoke) {
	heap->RevokeAllThreadLocalBuffers();
	}
	{
	ScopedThreadStateChange sts(Thread::Current(), kSuspended);
	ScopedSuspendAll ssa("Add image space");
	heap->AddSpace(space);
	}
	heap->SetSpaceAsDefault(space);
	}

	mirror::Class* GetByteArrayClass(Thread* self) REQUIRES_SHARED(Locks::mutator_lock_) {
	StackHandleScope<1> hs(self);
	auto null_loader(hs.NewHandle<mirror::ClassLoader>(nullptr));
	if (byte_array_class_ == nullptr) {
	mirror::Class* byte_array_class =
	Runtime::Current()->GetClassLinker()->FindClass(self, "[B", null_loader);
	EXPECT_TRUE(byte_array_class != nullptr);
	byte_array_class_ = self->GetJniEnv()->NewLocalRef(byte_array_class);
	EXPECT_TRUE(byte_array_class_ != nullptr);
	}
	return self->DecodeJObject(byte_array_class_)->AsClass();
	}

	mirror::Object* Alloc(space::MallocSpace* alloc_space,
	Thread* self,
	size_t bytes,
	size_t* bytes_allocated,
	size_t* usable_size,
	size_t* bytes_tl_bulk_allocated)
	REQUIRES_SHARED(Locks::mutator_lock_) {
	StackHandleScope<1> hs(self);
	Handle<mirror::Class> byte_array_class(hs.NewHandle(GetByteArrayClass(self)));
	mirror::Object* obj = alloc_space->Alloc(self,
	bytes,
	bytes_allocated,
	usable_size,
	bytes_tl_bulk_allocated);
	if (obj != nullptr) {
	InstallClass(obj, byte_array_class.Get(), bytes);
	}
	return obj;
	}

	mirror::Object* AllocWithGrowth(space::MallocSpace* alloc_space,
	Thread* self,
	size_t bytes,
	size_t* bytes_allocated,
	size_t* usable_size,
	size_t* bytes_tl_bulk_allocated)
	REQUIRES_SHARED(Locks::mutator_lock_) {
	StackHandleScope<1> hs(self);
	Handle<mirror::Class> byte_array_class(hs.NewHandle(GetByteArrayClass(self)));
	mirror::Object* obj = alloc_space->AllocWithGrowth(self, bytes, bytes_allocated, usable_size,
	bytes_tl_bulk_allocated);
	if (obj != nullptr) {
	InstallClass(obj, byte_array_class.Get(), bytes);
	}
	return obj;
	}

	void InstallClass(mirror::Object* o, mirror::Class* byte_array_class, size_t size)
	REQUIRES_SHARED(Locks::mutator_lock_) {
	// Note the minimum size, which is the size of a zero-length byte array.
	EXPECT_GE(size, SizeOfZeroLengthByteArray());
	EXPECT_TRUE(byte_array_class != nullptr);
	o->SetClass(byte_array_class);
	if (kUseBakerReadBarrier) {
	// Like the proper heap object allocation, install and verify
	// the correct read barrier state.
	o->AssertReadBarrierState();
	}
	mirror::Array* arr = o->AsArray<kVerifyNone>();
	size_t header_size = SizeOfZeroLengthByteArray();
	int32_t length = size - header_size;
	arr->SetLength(length);
	EXPECT_EQ(arr->SizeOf<kVerifyNone>(), size);
	}

	static size_t SizeOfZeroLengthByteArray() {
	return mirror::Array::DataOffset(Primitive::ComponentSize(Primitive::kPrimByte)).Uint32Value();
	}

	typedef MallocSpace* (*CreateSpaceFn)(const std::string& name, size_t initial_size, size_t growth_limit,
	size_t capacity, uint8_t* requested_begin);

	void SizeFootPrintGrowthLimitAndTrimBody(MallocSpace* space, intptr_t object_size,
	int round, size_t growth_limit);
	void SizeFootPrintGrowthLimitAndTrimDriver(size_t object_size, CreateSpaceFn create_space);
	};

	static inline size_t test_rand(size_t* seed) {
	seed = seed * 1103515245 + 12345;
	return *seed;
	}

	template <class Super>
	void SpaceTest<Super>::SizeFootPrintGrowthLimitAndTrimBody(MallocSpace* space,
	intptr_t object_size,
	int round,
	size_t growth_limit) {
	if (((object_size > 0 && object_size >= static_cast<intptr_t>(growth_limit))) \|\|
	((object_size < 0 && -object_size >= static_cast<intptr_t>(growth_limit)))) {
	// No allocation can succeed
	return;
	}

	// The space's footprint equals amount of resources requested from system
	size_t footprint = space->GetFootprint();

	// The space must at least have its book keeping allocated
	EXPECT_GT(footprint, 0u);

	// But it shouldn't exceed the initial size
	EXPECT_LE(footprint, growth_limit);

	// space's size shouldn't exceed the initial size
	EXPECT_LE(space->Size(), growth_limit);

	// this invariant should always hold or else the space has grown to be larger than what the
	// space believes its size is (which will break invariants)
	EXPECT_GE(space->Size(), footprint);

	// Fill the space with lots of small objects up to the growth limit
	size_t max_objects = (growth_limit / (object_size > 0 ? object_size : 8)) + 1;
	std::unique_ptr<mirror::Object[]> lots_of_objects(new mirror::Object[max_objects]);
	size_t last_object = 0; // last object for which allocation succeeded
	size_t amount_allocated = 0; // amount of space allocated
	Thread* self = Thread::Current();
	ScopedObjectAccess soa(self);
	size_t rand_seed = 123456789;
	for (size_t i = 0; i < max_objects; i++) {
	size_t alloc_fails = 0; // number of failed allocations
	size_t max_fails = 30; // number of times we fail allocation before giving up
	for (; alloc_fails < max_fails; alloc_fails++) {
	size_t alloc_size;
	if (object_size > 0) {
	alloc_size = object_size;
	} else {
	alloc_size = test_rand(&rand_seed) % static_cast<size_t>(-object_size);
	// Note the minimum size, which is the size of a zero-length byte array.
	size_t size_of_zero_length_byte_array = SizeOfZeroLengthByteArray();
	if (alloc_size < size_of_zero_length_byte_array) {
	alloc_size = size_of_zero_length_byte_array;
	}
	}
	StackHandleScope<1> hs(soa.Self());
	auto object(hs.NewHandle<mirror::Object>(nullptr));
	size_t bytes_allocated = 0;
	size_t bytes_tl_bulk_allocated;
	if (round <= 1) {
	object.Assign(Alloc(space, self, alloc_size, &bytes_allocated, nullptr,
	&bytes_tl_bulk_allocated));
	} else {
	object.Assign(AllocWithGrowth(space, self, alloc_size, &bytes_allocated, nullptr,
	&bytes_tl_bulk_allocated));
	}
	footprint = space->GetFootprint();
	EXPECT_GE(space->Size(), footprint); // invariant
	if (object != nullptr) { // allocation succeeded
	lots_of_objects[i] = object.Get();
	size_t allocation_size = space->AllocationSize(object.Get(), nullptr);
	EXPECT_EQ(bytes_allocated, allocation_size);
	if (object_size > 0) {
	EXPECT_GE(allocation_size, static_cast<size_t>(object_size));
	} else {
	EXPECT_GE(allocation_size, 8u);
	}
	EXPECT_TRUE(bytes_tl_bulk_allocated == 0 \|\|
	bytes_tl_bulk_allocated >= allocation_size);
	amount_allocated += allocation_size;
	break;
	}
	}
	if (alloc_fails == max_fails) {
	last_object = i;
	break;
	}
	}
	CHECK_NE(last_object, 0u); // we should have filled the space
	EXPECT_GT(amount_allocated, 0u);

	// We shouldn't have gone past the growth_limit
	EXPECT_LE(amount_allocated, growth_limit);
	EXPECT_LE(footprint, growth_limit);
	EXPECT_LE(space->Size(), growth_limit);

	// footprint and size should agree with amount allocated
	EXPECT_GE(footprint, amount_allocated);
	EXPECT_GE(space->Size(), amount_allocated);

	// Release storage in a semi-adhoc manner
	size_t free_increment = 96;
	while (true) {
	{
	ScopedThreadStateChange tsc(self, kNative);
	// Give the space a haircut.
	space->Trim();
	}

	// Bounds sanity
	footprint = space->GetFootprint();
	EXPECT_LE(amount_allocated, growth_limit);
	EXPECT_GE(footprint, amount_allocated);
	EXPECT_LE(footprint, growth_limit);
	EXPECT_GE(space->Size(), amount_allocated);
	EXPECT_LE(space->Size(), growth_limit);

	if (free_increment == 0) {
	break;
	}

	// Free some objects
	for (size_t i = 0; i < last_object; i += free_increment) {
	mirror::Object* object = lots_of_objects.get()[i];
	if (object == nullptr) {
	continue;
	}
	size_t allocation_size = space->AllocationSize(object, nullptr);
	if (object_size > 0) {
	EXPECT_GE(allocation_size, static_cast<size_t>(object_size));
	} else {
	EXPECT_GE(allocation_size, 8u);
	}
	space->Free(self, object);
	lots_of_objects.get()[i] = nullptr;
	amount_allocated -= allocation_size;
	footprint = space->GetFootprint();
	EXPECT_GE(space->Size(), footprint); // invariant
	}

	free_increment >>= 1;
	}

	// The space has become empty here before allocating a large object
	// below. For RosAlloc, revoke thread-local runs, which are kept
	// even when empty for a performance reason, so that they won't
	// cause the following large object allocation to fail due to
	// potential fragmentation. Note they are normally revoked at each
	// GC (but no GC here.)
	space->RevokeAllThreadLocalBuffers();

	// All memory was released, try a large allocation to check freed memory is being coalesced
	StackHandleScope<1> hs(soa.Self());
	auto large_object(hs.NewHandle<mirror::Object>(nullptr));
	size_t three_quarters_space = (growth_limit / 2) + (growth_limit / 4);
	size_t bytes_allocated = 0;
	size_t bytes_tl_bulk_allocated;
	if (round <= 1) {
	large_object.Assign(Alloc(space, self, three_quarters_space, &bytes_allocated, nullptr,
	&bytes_tl_bulk_allocated));
	} else {
	large_object.Assign(AllocWithGrowth(space, self, three_quarters_space, &bytes_allocated,
	nullptr, &bytes_tl_bulk_allocated));
	}
	EXPECT_TRUE(large_object != nullptr);

	// Sanity check footprint
	footprint = space->GetFootprint();
	EXPECT_LE(footprint, growth_limit);
	EXPECT_GE(space->Size(), footprint);
	EXPECT_LE(space->Size(), growth_limit);

	// Clean up
	space->Free(self, large_object.Assign(nullptr));

	// Sanity check footprint
	footprint = space->GetFootprint();
	EXPECT_LE(footprint, growth_limit);
	EXPECT_GE(space->Size(), footprint);
	EXPECT_LE(space->Size(), growth_limit);
	}

	template <class Super>
	void SpaceTest<Super>::SizeFootPrintGrowthLimitAndTrimDriver(size_t object_size,
	CreateSpaceFn create_space) {
	if (object_size < SizeOfZeroLengthByteArray()) {
	// Too small for the object layout/model.
	return;
	}
	size_t initial_size = 4 * MB;
	size_t growth_limit = 8 * MB;
	size_t capacity = 16 * MB;
	MallocSpace* space(create_space("test", initial_size, growth_limit, capacity, nullptr));
	ASSERT_TRUE(space != nullptr);

	// Basic sanity
	EXPECT_EQ(space->Capacity(), growth_limit);
	EXPECT_EQ(space->NonGrowthLimitCapacity(), capacity);

	// Make space findable to the heap, will also delete space when runtime is cleaned up
	AddSpace(space);

	// In this round we don't allocate with growth and therefore can't grow past the initial size.
	// This effectively makes the growth_limit the initial_size, so assert this.
	SizeFootPrintGrowthLimitAndTrimBody(space, object_size, 1, initial_size);
	SizeFootPrintGrowthLimitAndTrimBody(space, object_size, 2, growth_limit);
	// Remove growth limit
	space->ClearGrowthLimit();
	EXPECT_EQ(space->Capacity(), capacity);
	SizeFootPrintGrowthLimitAndTrimBody(space, object_size, 3, capacity);
	}

	#define TEST_SizeFootPrintGrowthLimitAndTrimStatic(name, spaceName, spaceFn, size) \
	TEST_F(spaceName##StaticTest, SizeFootPrintGrowthLimitAndTrim_AllocationsOf_##name) { \
	SizeFootPrintGrowthLimitAndTrimDriver(size, spaceFn); \
	}

	#define TEST_SizeFootPrintGrowthLimitAndTrimRandom(name, spaceName, spaceFn, size) \
	TEST_F(spaceName##RandomTest, SizeFootPrintGrowthLimitAndTrim_RandomAllocationsWithMax_##name) { \
	SizeFootPrintGrowthLimitAndTrimDriver(-(size), spaceFn); \
	}

	#define TEST_SPACE_CREATE_FN_STATIC(spaceName, spaceFn) \
	class spaceName##StaticTest : public SpaceTest<CommonRuntimeTest> { \
	}; \
	\
	TEST_SizeFootPrintGrowthLimitAndTrimStatic(12B, spaceName, spaceFn, 12) \
	TEST_SizeFootPrintGrowthLimitAndTrimStatic(16B, spaceName, spaceFn, 16) \
	TEST_SizeFootPrintGrowthLimitAndTrimStatic(24B, spaceName, spaceFn, 24) \
	TEST_SizeFootPrintGrowthLimitAndTrimStatic(32B, spaceName, spaceFn, 32) \
	TEST_SizeFootPrintGrowthLimitAndTrimStatic(64B, spaceName, spaceFn, 64) \
	TEST_SizeFootPrintGrowthLimitAndTrimStatic(128B, spaceName, spaceFn, 128) \
	TEST_SizeFootPrintGrowthLimitAndTrimStatic(1KB, spaceName, spaceFn, 1 * KB) \
	TEST_SizeFootPrintGrowthLimitAndTrimStatic(4KB, spaceName, spaceFn, 4 * KB) \
	TEST_SizeFootPrintGrowthLimitAndTrimStatic(1MB, spaceName, spaceFn, 1 * MB) \
	TEST_SizeFootPrintGrowthLimitAndTrimStatic(4MB, spaceName, spaceFn, 4 * MB) \
	TEST_SizeFootPrintGrowthLimitAndTrimStatic(8MB, spaceName, spaceFn, 8 * MB)

	#define TEST_SPACE_CREATE_FN_RANDOM(spaceName, spaceFn) \
	class spaceName##RandomTest : public SpaceTest<CommonRuntimeTest> { \
	}; \
	\
	TEST_SizeFootPrintGrowthLimitAndTrimRandom(16B, spaceName, spaceFn, 16) \
	TEST_SizeFootPrintGrowthLimitAndTrimRandom(24B, spaceName, spaceFn, 24) \
	TEST_SizeFootPrintGrowthLimitAndTrimRandom(32B, spaceName, spaceFn, 32) \
	TEST_SizeFootPrintGrowthLimitAndTrimRandom(64B, spaceName, spaceFn, 64) \
	TEST_SizeFootPrintGrowthLimitAndTrimRandom(128B, spaceName, spaceFn, 128) \
	TEST_SizeFootPrintGrowthLimitAndTrimRandom(1KB, spaceName, spaceFn, 1 * KB) \
	TEST_SizeFootPrintGrowthLimitAndTrimRandom(4KB, spaceName, spaceFn, 4 * KB) \
	TEST_SizeFootPrintGrowthLimitAndTrimRandom(1MB, spaceName, spaceFn, 1 * MB) \
	TEST_SizeFootPrintGrowthLimitAndTrimRandom(4MB, spaceName, spaceFn, 4 * MB) \
	TEST_SizeFootPrintGrowthLimitAndTrimRandom(8MB, spaceName, spaceFn, 8 * MB)

	} // namespace space
	} // namespace gc
	} // namespace art

	#endif // ART_RUNTIME_GC_SPACE_SPACE_TEST_H_