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// Copyright 2020 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 "tests/utils.h"
#include <cstddef>
#include <cstdint>
#include <memory>
#include <new>
#include "absl/base/config.h"
#include "gtest/gtest.h"
#include "src/utils/memory.h"
#ifdef ABSL_HAVE_EXCEPTIONS
#include <exception>
#endif
namespace libgav1 {
namespace test_utils {
namespace {
constexpr size_t kMaxAllocableSize = 0x40000000;
// Has a trivial default constructor that performs no action.
struct SmallMaxAligned : public MaxAlignedAllocable {
alignas(kMaxAlignment) uint8_t x;
};
// Has a nontrivial default constructor that initializes the data member.
struct SmallMaxAlignedNontrivialConstructor : public MaxAlignedAllocable {
alignas(kMaxAlignment) uint8_t x = 0;
};
// Has a trivial default constructor that performs no action.
struct HugeMaxAligned : public MaxAlignedAllocable {
alignas(kMaxAlignment) uint8_t x[kMaxAllocableSize + 1];
};
// Has a nontrivial default constructor that initializes the data member.
struct HugeMaxAlignedNontrivialConstructor : public MaxAlignedAllocable {
alignas(kMaxAlignment) uint8_t x[kMaxAllocableSize + 1] = {};
};
#ifdef ABSL_HAVE_EXCEPTIONS
struct MaxAlignedThrowingConstructor : public MaxAlignedAllocable {
MaxAlignedThrowingConstructor() { throw std::exception(); }
uint8_t x;
};
#endif
TEST(TestUtilsTest, 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.
}
{
// MaxAlignedAllocable::operator new is called.
std::unique_ptr<SmallMaxAligned> small(new 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.
}
{
// 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.
}
{
// MaxAlignedAllocable::operator new[] is called.
std::unique_ptr<SmallMaxAligned[]> small_array_of_smalls(
new 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.
}
{
// 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 is called.
// The constructor throws an exception.
// MaxAlignedAllocable::operator delete is called.
auto* always = new 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 (...) {
}
try {
// MaxAlignedAllocable::operator new[] is called.
// The constructor throws an exception.
// MaxAlignedAllocable::operator delete[] is called.
auto* always = new MaxAlignedThrowingConstructor[2];
static_cast<void>(always);
} catch (...) {
}
// Note these calls are only safe with exceptions enabled as if the throwing
// operator new returns the object is expected to be valid. In this case an
// attempt to invoke the object's constructor on a nullptr may be made which
// is undefined behavior.
try {
// MaxAlignedAllocable::operator new is called.
std::unique_ptr<HugeMaxAlignedNontrivialConstructor> huge(
new HugeMaxAlignedNontrivialConstructor);
ADD_FAILURE() << "huge allocation should fail.";
} catch (...) {
SUCCEED();
}
try {
// MaxAlignedAllocable::operator new[] is called.
std::unique_ptr<SmallMaxAlignedNontrivialConstructor[]>
huge_array_of_smalls(
new SmallMaxAlignedNontrivialConstructor
[kMaxAllocableSize /
sizeof(SmallMaxAlignedNontrivialConstructor) +
1]);
ADD_FAILURE() << "huge_array_of_smalls allocation should fail.";
} catch (...) {
SUCCEED();
}
#endif // ABSL_HAVE_EXCEPTIONS
}
} // namespace
} // namespace test_utils
} // namespace libgav1
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