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// Copyright 2021 The libgav1 Authors
//
// 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.
#include "src/utils/memory.h"
#include <cstddef>
#include <cstdint>
#include <memory>
#include <new>
#include "absl/base/config.h"
#include "gtest/gtest.h"
#ifdef ABSL_HAVE_EXCEPTIONS
#include <exception>
#endif
namespace libgav1 {
namespace {
constexpr size_t kMaxAllocableSize = 0x40000000;
struct Small : public Allocable {
uint8_t x;
};
struct Huge : public Allocable {
uint8_t x[kMaxAllocableSize + 1];
};
struct SmallMaxAligned : public MaxAlignedAllocable {
alignas(kMaxAlignment) uint8_t x;
};
struct HugeMaxAligned : public MaxAlignedAllocable {
alignas(kMaxAlignment) uint8_t x[kMaxAllocableSize + 1];
};
#ifdef ABSL_HAVE_EXCEPTIONS
struct ThrowingConstructor : public Allocable {
ThrowingConstructor() { throw std::exception(); }
uint8_t x;
};
struct MaxAlignedThrowingConstructor : public MaxAlignedAllocable {
MaxAlignedThrowingConstructor() { throw std::exception(); }
uint8_t x;
};
#endif
TEST(MemoryTest, TestAlignedAllocFree) {
for (size_t alignment = 1; alignment <= 1 << 20; alignment <<= 1) {
void* p = AlignedAlloc(alignment, 1);
// Note this additional check is to avoid an incorrect static-analysis
// warning for leaked memory with a plain ASSERT_NE().
if (p == nullptr) {
FAIL() << "AlignedAlloc(" << alignment << ", 1)";
}
const auto p_value = reinterpret_cast<uintptr_t>(p);
EXPECT_EQ(p_value % alignment, 0)
<< "AlignedAlloc(" << alignment << ", 1) = " << p;
AlignedFree(p);
}
}
TEST(MemoryTest, TestAlignedUniquePtrAlloc) {
for (size_t alignment = 1; alignment <= 1 << 20; alignment <<= 1) {
auto p = MakeAlignedUniquePtr<uint8_t>(alignment, 1);
ASSERT_NE(p, nullptr) << "MakeAlignedUniquePtr(" << alignment << ", 1)";
const auto p_value = reinterpret_cast<uintptr_t>(p.get());
EXPECT_EQ(p_value % alignment, 0)
<< "MakeAlignedUniquePtr(" << alignment << ", 1) = " << p.get();
}
}
TEST(MemoryTest, TestAllocable) {
// Allocable::operator new (std::nothrow) is called.
std::unique_ptr<Small> small(new (std::nothrow) Small);
EXPECT_NE(small, nullptr);
// Allocable::operator delete is called.
small = nullptr;
// Allocable::operator new[] (std::nothrow) is called.
std::unique_ptr<Small[]> small_array_of_smalls(new (std::nothrow) Small[10]);
EXPECT_NE(small_array_of_smalls, nullptr);
// Allocable::operator delete[] is called.
small_array_of_smalls = nullptr;
// Allocable::operator new (std::nothrow) is called.
std::unique_ptr<Huge> huge(new (std::nothrow) Huge);
EXPECT_EQ(huge, nullptr);
// Allocable::operator new[] (std::nothrow) is called.
std::unique_ptr<Small[]> huge_array_of_smalls(
new (std::nothrow) Small[kMaxAllocableSize / sizeof(Small) + 1]);
EXPECT_EQ(huge_array_of_smalls, nullptr);
#ifdef ABSL_HAVE_EXCEPTIONS
try {
// Allocable::operator new (std::nothrow) is called.
// The constructor throws an exception.
// Allocable::operator delete (std::nothrow) is called.
ThrowingConstructor* always = new (std::nothrow) ThrowingConstructor;
static_cast<void>(always);
} catch (...) {
}
try {
// Allocable::operator new[] (std::nothrow) is called.
// The constructor throws an exception.
// Allocable::operator delete[] (std::nothrow) is called.
ThrowingConstructor* always = new (std::nothrow) ThrowingConstructor[2];
static_cast<void>(always);
} catch (...) {
}
#endif // ABSL_HAVE_EXCEPTIONS
}
TEST(MemoryTest, TestMaxAlignedAllocable) {
// MaxAlignedAllocable::operator new (std::nothrow) is called.
std::unique_ptr<SmallMaxAligned> small(new (std::nothrow) SmallMaxAligned);
EXPECT_NE(small, nullptr);
// Note this check doesn't guarantee conformance as a suitably aligned
// address may be returned from any allocator.
EXPECT_EQ(reinterpret_cast<uintptr_t>(small.get()) & (kMaxAlignment - 1), 0);
// MaxAlignedAllocable::operator delete is called.
small = nullptr;
// MaxAlignedAllocable::operator new[] (std::nothrow) is called.
std::unique_ptr<SmallMaxAligned[]> small_array_of_smalls(
new (std::nothrow) SmallMaxAligned[10]);
EXPECT_NE(small_array_of_smalls, nullptr);
EXPECT_EQ(reinterpret_cast<uintptr_t>(small_array_of_smalls.get()) &
(kMaxAlignment - 1),
0);
// MaxAlignedAllocable::operator delete[] is called.
small_array_of_smalls = nullptr;
// MaxAlignedAllocable::operator new (std::nothrow) is called.
std::unique_ptr<HugeMaxAligned> huge(new (std::nothrow) HugeMaxAligned);
EXPECT_EQ(huge, nullptr);
// MaxAlignedAllocable::operator new[] (std::nothrow) is called.
std::unique_ptr<SmallMaxAligned[]> huge_array_of_smalls(
new (std::nothrow)
SmallMaxAligned[kMaxAllocableSize / sizeof(SmallMaxAligned) + 1]);
EXPECT_EQ(huge_array_of_smalls, nullptr);
#ifdef ABSL_HAVE_EXCEPTIONS
try {
// MaxAlignedAllocable::operator new (std::nothrow) is called.
// The constructor throws an exception.
// MaxAlignedAllocable::operator delete (std::nothrow) is called.
auto* always = new (std::nothrow) MaxAlignedThrowingConstructor;
static_cast<void>(always);
} catch (...) {
}
try {
// MaxAlignedAllocable::operator new[] (std::nothrow) is called.
// The constructor throws an exception.
// MaxAlignedAllocable::operator delete[] (std::nothrow) is called.
auto* always = new (std::nothrow) MaxAlignedThrowingConstructor[2];
static_cast<void>(always);
} catch (...) {
}
#endif // ABSL_HAVE_EXCEPTIONS
}
} // namespace
} // namespace libgav1
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