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      1 /*
      2  * Copyright (C) 2011 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 "class_linker-inl.h"
     18 #include "common_runtime_test.h"
     19 #include "gc/accounting/card_table-inl.h"
     20 #include "gc/accounting/space_bitmap-inl.h"
     21 #include "handle_scope-inl.h"
     22 #include "mirror/class-inl.h"
     23 #include "mirror/object-inl.h"
     24 #include "mirror/object_array-inl.h"
     25 #include "scoped_thread_state_change-inl.h"
     26 
     27 namespace art {
     28 namespace gc {
     29 
     30 class HeapTest : public CommonRuntimeTest {
     31  public:
     32   void SetUp() OVERRIDE {
     33     MemMap::Init();
     34     std::string error_msg;
     35     // Reserve the preferred address to force the heap to use another one for testing.
     36     reserved_.reset(MemMap::MapAnonymous("ReserveMap",
     37                                          gc::Heap::kPreferredAllocSpaceBegin,
     38                                          16 * KB,
     39                                          PROT_READ,
     40                                          /*low_4gb*/ true,
     41                                          /*reuse*/ false,
     42                                          &error_msg));
     43     ASSERT_TRUE(reserved_ != nullptr) << error_msg;
     44     CommonRuntimeTest::SetUp();
     45   }
     46 
     47  private:
     48   std::unique_ptr<MemMap> reserved_;
     49 };
     50 
     51 TEST_F(HeapTest, ClearGrowthLimit) {
     52   Heap* heap = Runtime::Current()->GetHeap();
     53   int64_t max_memory_before = heap->GetMaxMemory();
     54   int64_t total_memory_before = heap->GetTotalMemory();
     55   heap->ClearGrowthLimit();
     56   int64_t max_memory_after = heap->GetMaxMemory();
     57   int64_t total_memory_after = heap->GetTotalMemory();
     58   EXPECT_GE(max_memory_after, max_memory_before);
     59   EXPECT_GE(total_memory_after, total_memory_before);
     60 }
     61 
     62 TEST_F(HeapTest, GarbageCollectClassLinkerInit) {
     63   {
     64     ScopedObjectAccess soa(Thread::Current());
     65     // garbage is created during ClassLinker::Init
     66 
     67     StackHandleScope<1> hs(soa.Self());
     68     Handle<mirror::Class> c(
     69         hs.NewHandle(class_linker_->FindSystemClass(soa.Self(), "[Ljava/lang/Object;")));
     70     for (size_t i = 0; i < 1024; ++i) {
     71       StackHandleScope<1> hs2(soa.Self());
     72       Handle<mirror::ObjectArray<mirror::Object>> array(hs2.NewHandle(
     73           mirror::ObjectArray<mirror::Object>::Alloc(soa.Self(), c.Get(), 2048)));
     74       for (size_t j = 0; j < 2048; ++j) {
     75         mirror::String* string = mirror::String::AllocFromModifiedUtf8(soa.Self(), "hello, world!");
     76         // handle scope operator -> deferences the handle scope before running the method.
     77         array->Set<false>(j, string);
     78       }
     79     }
     80   }
     81   Runtime::Current()->GetHeap()->CollectGarbage(/* clear_soft_references */ false);
     82 }
     83 
     84 TEST_F(HeapTest, HeapBitmapCapacityTest) {
     85   uint8_t* heap_begin = reinterpret_cast<uint8_t*>(0x1000);
     86   const size_t heap_capacity = kObjectAlignment * (sizeof(intptr_t) * 8 + 1);
     87   std::unique_ptr<accounting::ContinuousSpaceBitmap> bitmap(
     88       accounting::ContinuousSpaceBitmap::Create("test bitmap", heap_begin, heap_capacity));
     89   mirror::Object* fake_end_of_heap_object =
     90       reinterpret_cast<mirror::Object*>(&heap_begin[heap_capacity - kObjectAlignment]);
     91   bitmap->Set(fake_end_of_heap_object);
     92 }
     93 
     94 TEST_F(HeapTest, DumpGCPerformanceOnShutdown) {
     95   Runtime::Current()->GetHeap()->CollectGarbage(/* clear_soft_references */ false);
     96   Runtime::Current()->SetDumpGCPerformanceOnShutdown(true);
     97 }
     98 
     99 class ZygoteHeapTest : public CommonRuntimeTest {
    100   void SetUpRuntimeOptions(RuntimeOptions* options) {
    101     CommonRuntimeTest::SetUpRuntimeOptions(options);
    102     options->push_back(std::make_pair("-Xzygote", nullptr));
    103   }
    104 };
    105 
    106 TEST_F(ZygoteHeapTest, PreZygoteFork) {
    107   // Exercise Heap::PreZygoteFork() to check it does not crash.
    108   Runtime::Current()->GetHeap()->PreZygoteFork();
    109 }
    110 
    111 }  // namespace gc
    112 }  // namespace art
    113