base/memory/discardable_memory_unittest.cc

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/memory/discardable_memory.h"
   6
   7 #include <algorithm>
   8
   9 #include "testing/gtest/include/gtest/gtest.h"
  10
  11 #if defined(OS_ANDROID)
  12 #include <limits>
  13 #endif
  14
  15 namespace base {
  16 namespace {
  17
  18 class DiscardableMemoryTest
  19     : public testing::TestWithParam<DiscardableMemoryType> {
  20  public:
  21   DiscardableMemoryTest() {}
  22   virtual ~DiscardableMemoryTest() {
  23   }
  24
  25  protected:
  26   scoped_ptr<DiscardableMemory> CreateLockedMemory(size_t size) {
  27     return DiscardableMemory::CreateLockedMemoryWithType(
  28         GetParam(), size).Pass();
  29   }
  30 };
  31
  32 const size_t kSize = 1024;
  33
  34 TEST_P(DiscardableMemoryTest, IsNamed) {
  35   std::string type_name(DiscardableMemory::GetTypeName(GetParam()));
  36   EXPECT_NE("unknown", type_name);
  37   EXPECT_EQ(GetParam(), DiscardableMemory::GetNamedType(type_name));
  38 }
  39
  40 bool IsNativeType(DiscardableMemoryType type) {
  41   return type == DISCARDABLE_MEMORY_TYPE_ASHMEM ||
  42          type == DISCARDABLE_MEMORY_TYPE_MACH;
  43 }
  44
  45 TEST_P(DiscardableMemoryTest, SupportedNatively) {
  46   std::vector<DiscardableMemoryType> supported_types;
  47   DiscardableMemory::GetSupportedTypes(&supported_types);
  48 #if defined(DISCARDABLE_MEMORY_ALWAYS_SUPPORTED_NATIVELY)
  49   EXPECT_NE(0, std::count_if(supported_types.begin(),
  50                              supported_types.end(),
  51                              IsNativeType));
  52 #else
  53   // If we ever have a platform that decides at runtime if it can support
  54   // discardable memory natively, then we'll have to add a 'never supported
  55   // natively' define for this case. At present, if it's not always supported
  56   // natively, it's never supported.
  57   EXPECT_EQ(0, std::count_if(supported_types.begin(),
  58                              supported_types.end(),
  59                              IsNativeType));
  60 #endif
  61 }
  62
  63 // Test Lock() and Unlock() functionalities.
  64 TEST_P(DiscardableMemoryTest, LockAndUnLock) {
  65   const scoped_ptr<DiscardableMemory> memory(CreateLockedMemory(kSize));
  66   ASSERT_TRUE(memory);
  67   void* addr = memory->Memory();
  68   ASSERT_NE(nullptr, addr);
  69
  70   memory->Unlock();
  71
  72   EXPECT_NE(DISCARDABLE_MEMORY_LOCK_STATUS_FAILED, memory->Lock());
  73   addr = memory->Memory();
  74   ASSERT_NE(nullptr, addr);
  75
  76   memory->Unlock();
  77 }
  78
  79 // Test delete a discardable memory while it is locked.
  80 TEST_P(DiscardableMemoryTest, DeleteWhileLocked) {
  81   const scoped_ptr<DiscardableMemory> memory(CreateLockedMemory(kSize));
  82   ASSERT_TRUE(memory);
  83 }
  84
  85 // Test forced purging.
  86 TEST_P(DiscardableMemoryTest, Purge) {
  87   const scoped_ptr<DiscardableMemory> memory(CreateLockedMemory(kSize));
  88   ASSERT_TRUE(memory);
  89   memory->Unlock();
  90
  91   DiscardableMemory::PurgeForTesting();
  92   EXPECT_EQ(DISCARDABLE_MEMORY_LOCK_STATUS_PURGED, memory->Lock());
  93 }
  94
  95 #if !defined(NDEBUG) && !defined(OS_ANDROID)
  96 // Death tests are not supported with Android APKs.
  97 TEST_P(DiscardableMemoryTest, UnlockedMemoryAccessCrashesInDebugMode) {
  98   const scoped_ptr<DiscardableMemory> memory(CreateLockedMemory(kSize));
  99   ASSERT_TRUE(memory);
 100   memory->Unlock();
 101   ASSERT_DEATH_IF_SUPPORTED(
 102       { *static_cast<int*>(memory->Memory()) = 0xdeadbeef; }, ".*");
 103 }
 104 #endif
 105
 106 // Test behavior when creating enough instances that could use up a 32-bit
 107 // address space.
 108 TEST_P(DiscardableMemoryTest, AddressSpace) {
 109   const size_t kLargeSize = 4 * 1024 * 1024;  // 4MiB.
 110   const size_t kNumberOfInstances = 1024 + 1;  // >4GiB total.
 111
 112   scoped_ptr<DiscardableMemory> instances[kNumberOfInstances];
 113   for (auto& memory : instances) {
 114     memory = CreateLockedMemory(kLargeSize);
 115     ASSERT_TRUE(memory);
 116     void* addr = memory->Memory();
 117     ASSERT_NE(nullptr, addr);
 118     memory->Unlock();
 119   }
 120 }
 121
 122 std::vector<DiscardableMemoryType> GetSupportedDiscardableMemoryTypes() {
 123   std::vector<DiscardableMemoryType> supported_types;
 124   DiscardableMemory::GetSupportedTypes(&supported_types);
 125   return supported_types;
 126 }
 127
 128 INSTANTIATE_TEST_CASE_P(
 129     DiscardableMemoryTests,
 130     DiscardableMemoryTest,
 131     ::testing::ValuesIn(GetSupportedDiscardableMemoryTypes()));
 132
 133 }  // namespace
 134 }  // namespace base