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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif
#include "third_party/blink/renderer/platform/wtf/atomic_operations.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace WTF {
class AtomicOperationsTest : public ::testing::Test {};
template <size_t buffer_size, size_t alignment, typename CopyMethod>
void TestCopyImpl(CopyMethod copy) {
alignas(alignment) unsigned char src[buffer_size];
for (size_t i = 0; i < buffer_size; ++i)
src[i] = static_cast<char>(i + 1);
// Allocating extra memory before and after the buffer to make sure the
// atomic memcpy doesn't exceed the buffer in any direction.
alignas(alignment) unsigned char tgt[buffer_size + (2 * sizeof(size_t))];
memset(tgt, 0, buffer_size + (2 * sizeof(size_t)));
copy(tgt + sizeof(size_t), src);
// Check nothing before the buffer was changed
size_t v;
memcpy(&v, tgt, sizeof(size_t));
EXPECT_EQ(0u, v);
// Check buffer was copied correctly
EXPECT_TRUE(!memcmp(src, tgt + sizeof(size_t), buffer_size));
// Check nothing after the buffer was changed
memcpy(&v, tgt + sizeof(size_t) + buffer_size, sizeof(size_t));
EXPECT_EQ(0u, v);
}
// Tests for AtomicReadMemcpy
template <size_t buffer_size, size_t alignment>
void TestAtomicReadMemcpy() {
TestCopyImpl<buffer_size, alignment>(
AtomicReadMemcpy<buffer_size, alignment>);
}
TEST_F(AtomicOperationsTest, AtomicReadMemcpy_UINT8T) {
TestAtomicReadMemcpy<sizeof(uint8_t), sizeof(uint32_t)>();
TestAtomicReadMemcpy<sizeof(uint8_t), sizeof(uintptr_t)>();
}
TEST_F(AtomicOperationsTest, AtomicReadMemcpy_UINT16T) {
TestAtomicReadMemcpy<sizeof(uint16_t), sizeof(uint32_t)>();
TestAtomicReadMemcpy<sizeof(uint16_t), sizeof(uintptr_t)>();
}
TEST_F(AtomicOperationsTest, AtomicReadMemcpy_UINT32T) {
TestAtomicReadMemcpy<sizeof(uint32_t), sizeof(uint32_t)>();
TestAtomicReadMemcpy<sizeof(uint32_t), sizeof(uintptr_t)>();
}
TEST_F(AtomicOperationsTest, AtomicReadMemcpy_UINT64T) {
TestAtomicReadMemcpy<sizeof(uint64_t), sizeof(uint32_t)>();
TestAtomicReadMemcpy<sizeof(uint64_t), sizeof(uintptr_t)>();
}
TEST_F(AtomicOperationsTest, AtomicReadMemcpy_17Bytes) {
TestAtomicReadMemcpy<17, sizeof(uint32_t)>();
TestAtomicReadMemcpy<17, sizeof(uintptr_t)>();
}
TEST_F(AtomicOperationsTest, AtomicReadMemcpy_34Bytes) {
TestAtomicReadMemcpy<34, sizeof(uint32_t)>();
TestAtomicReadMemcpy<34, sizeof(uintptr_t)>();
}
TEST_F(AtomicOperationsTest, AtomicReadMemcpy_68Bytes) {
TestAtomicReadMemcpy<68, sizeof(uint32_t)>();
TestAtomicReadMemcpy<68, sizeof(uintptr_t)>();
}
TEST_F(AtomicOperationsTest, AtomicReadMemcpy_127Bytes) {
TestAtomicReadMemcpy<127, sizeof(uint32_t)>();
TestAtomicReadMemcpy<127, sizeof(uintptr_t)>();
}
// Tests for AtomicWriteMemcpy
template <size_t buffer_size, size_t alignment>
void TestAtomicWriteMemcpy() {
TestCopyImpl<buffer_size, alignment>(
AtomicWriteMemcpy<buffer_size, alignment>);
}
TEST_F(AtomicOperationsTest, AtomicWriteMemcpy_UINT8T) {
TestAtomicWriteMemcpy<sizeof(uint8_t), sizeof(uint32_t)>();
TestAtomicWriteMemcpy<sizeof(uint8_t), sizeof(uintptr_t)>();
}
TEST_F(AtomicOperationsTest, AtomicWriteMemcpy_UINT16T) {
TestAtomicWriteMemcpy<sizeof(uint16_t), sizeof(uint32_t)>();
TestAtomicWriteMemcpy<sizeof(uint16_t), sizeof(uintptr_t)>();
}
TEST_F(AtomicOperationsTest, AtomicWriteMemcpy_UINT32T) {
TestAtomicWriteMemcpy<sizeof(uint32_t), sizeof(uint32_t)>();
TestAtomicWriteMemcpy<sizeof(uint32_t), sizeof(uintptr_t)>();
}
TEST_F(AtomicOperationsTest, AtomicWriteMemcpy_UINT64T) {
TestAtomicWriteMemcpy<sizeof(uint64_t), sizeof(uint32_t)>();
TestAtomicWriteMemcpy<sizeof(uint64_t), sizeof(uintptr_t)>();
}
TEST_F(AtomicOperationsTest, AtomicWriteMemcpy_17Bytes) {
TestAtomicWriteMemcpy<17, sizeof(uint32_t)>();
TestAtomicWriteMemcpy<17, sizeof(uintptr_t)>();
}
TEST_F(AtomicOperationsTest, AtomicWriteMemcpy_34Bytes) {
TestAtomicWriteMemcpy<34, sizeof(uint32_t)>();
TestAtomicWriteMemcpy<34, sizeof(uintptr_t)>();
}
TEST_F(AtomicOperationsTest, AtomicWriteMemcpy_68Bytes) {
TestAtomicWriteMemcpy<68, sizeof(uint32_t)>();
TestAtomicWriteMemcpy<68, sizeof(uintptr_t)>();
}
TEST_F(AtomicOperationsTest, AtomicWriteMemcpy_127Bytes) {
TestAtomicWriteMemcpy<127, sizeof(uint32_t)>();
TestAtomicWriteMemcpy<127, sizeof(uintptr_t)>();
}
// Tests for AtomicMemzero
template <size_t buffer_size, size_t alignment>
void TestAtomicMemzero() {
// Allocating extra memory before and after the buffer to make sure the
// AtomicMemzero doesn't exceed the buffer in any direction.
alignas(alignment) unsigned char buf[buffer_size + (2 * sizeof(size_t))];
memset(buf, ~uint8_t{0}, buffer_size + (2 * sizeof(size_t)));
AtomicMemzero<buffer_size, alignment>(buf + sizeof(size_t));
// Check nothing before the buffer was changed
size_t v;
memcpy(&v, buf, sizeof(size_t));
EXPECT_EQ(~size_t{0}, v);
// Check buffer was copied correctly
static const unsigned char for_comparison[buffer_size] = {};
EXPECT_TRUE(!memcmp(buf + sizeof(size_t), for_comparison, buffer_size));
// Check nothing after the buffer was changed
memcpy(&v, buf + sizeof(size_t) + buffer_size, sizeof(size_t));
EXPECT_EQ(~size_t{0}, v);
}
TEST_F(AtomicOperationsTest, AtomicMemzero_UINT8T) {
TestAtomicMemzero<sizeof(uint8_t), sizeof(uint32_t)>();
TestAtomicMemzero<sizeof(uint8_t), sizeof(uintptr_t)>();
}
TEST_F(AtomicOperationsTest, AtomicMemzero_UINT16T) {
TestAtomicMemzero<sizeof(uint16_t), sizeof(uint32_t)>();
TestAtomicMemzero<sizeof(uint16_t), sizeof(uintptr_t)>();
}
TEST_F(AtomicOperationsTest, AtomicMemzero_UINT32T) {
TestAtomicMemzero<sizeof(uint32_t), sizeof(uint32_t)>();
TestAtomicMemzero<sizeof(uint32_t), sizeof(uintptr_t)>();
}
TEST_F(AtomicOperationsTest, AtomicMemzero_UINT64T) {
TestAtomicMemzero<sizeof(uint64_t), sizeof(uint32_t)>();
TestAtomicMemzero<sizeof(uint64_t), sizeof(uintptr_t)>();
}
TEST_F(AtomicOperationsTest, AtomicMemzero_17Bytes) {
TestAtomicMemzero<17, sizeof(uint32_t)>();
TestAtomicMemzero<17, sizeof(uintptr_t)>();
}
TEST_F(AtomicOperationsTest, AtomicMemzero_34Bytes) {
TestAtomicMemzero<34, sizeof(uint32_t)>();
TestAtomicMemzero<34, sizeof(uintptr_t)>();
}
TEST_F(AtomicOperationsTest, AtomicMemzero_68Bytes) {
TestAtomicMemzero<68, sizeof(uint32_t)>();
TestAtomicMemzero<68, sizeof(uintptr_t)>();
}
TEST_F(AtomicOperationsTest, AtomicMemzero_127Bytes) {
TestAtomicMemzero<127, sizeof(uint32_t)>();
TestAtomicMemzero<127, sizeof(uintptr_t)>();
}
} // namespace WTF
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