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// Copyright (c) 2013 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/memory/discardable_memory.h"
#include <limits>
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
const size_t kSize = 1024;
#if defined(OS_ANDROID)
TEST(DiscardableMemoryTest, TooLargeAllocationFails) {
const size_t kPageSize = 4096;
const size_t max_allowed_allocation_size =
std::numeric_limits<size_t>::max() - kPageSize + 1;
scoped_ptr<DiscardableMemory> memory(
DiscardableMemory::CreateLockedMemory(max_allowed_allocation_size + 1));
// On certain platforms (e.g. Android), page-alignment would have caused an
// overflow resulting in a small allocation if the input size wasn't checked
// correctly.
ASSERT_FALSE(memory);
}
#endif
TEST(DiscardableMemoryTest, SupportedNatively) {
#if defined(DISCARDABLE_MEMORY_ALWAYS_SUPPORTED_NATIVELY)
ASSERT_TRUE(DiscardableMemory::SupportedNatively());
#else
// If we ever have a platform that decides at runtime if it can support
// discardable memory natively, then we'll have to add a 'never supported
// natively' define for this case. At present, if it's not always supported
// natively, it's never supported.
ASSERT_FALSE(DiscardableMemory::SupportedNatively());
#endif
}
// Test Lock() and Unlock() functionalities.
TEST(DiscardableMemoryTest, LockAndUnLock) {
const scoped_ptr<DiscardableMemory> memory(
DiscardableMemory::CreateLockedMemory(kSize));
ASSERT_TRUE(memory);
void* addr = memory->Memory();
ASSERT_NE(static_cast<void*>(NULL), addr);
memory->Unlock();
// The system should have no reason to purge discardable blocks in this brief
// interval, though technically speaking this might flake.
EXPECT_EQ(DISCARDABLE_MEMORY_SUCCESS, memory->Lock());
addr = memory->Memory();
ASSERT_NE(static_cast<void*>(NULL), addr);
memory->Unlock();
}
// Test delete a discardable memory while it is locked.
TEST(DiscardableMemoryTest, DeleteWhileLocked) {
const scoped_ptr<DiscardableMemory> memory(
DiscardableMemory::CreateLockedMemory(kSize));
ASSERT_TRUE(memory);
}
#if !defined(OS_ANDROID)
// Test forced purging.
TEST(DiscardableMemoryTest, Purge) {
ASSERT_TRUE(DiscardableMemory::PurgeForTestingSupported());
const scoped_ptr<DiscardableMemory> memory(
DiscardableMemory::CreateLockedMemory(kSize));
ASSERT_TRUE(memory);
memory->Unlock();
DiscardableMemory::PurgeForTesting();
EXPECT_EQ(DISCARDABLE_MEMORY_PURGED, memory->Lock());
}
#endif // !OS_ANDROID
#if !defined(NDEBUG) && !defined(OS_ANDROID)
// Death tests are not supported with Android APKs.
TEST(DiscardableMemoryTest, UnlockedMemoryAccessCrashesInDebugMode) {
const scoped_ptr<DiscardableMemory> memory(
DiscardableMemory::CreateLockedMemory(kSize));
ASSERT_TRUE(memory);
memory->Unlock();
ASSERT_DEATH_IF_SUPPORTED(
{ *static_cast<int*>(memory->Memory()) = 0xdeadbeef; }, ".*");
}
#endif
}
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