| /* |
| * Copyright (C) 2015 The Android Open Source Project |
| * |
| * 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 "luni/src/main/native/libcore_io_Memory.cpp" |
| |
| #include <stdlib.h> |
| |
| #include <functional> |
| |
| #include <gtest/gtest.h> |
| |
| #define ALIGNMENT 8 |
| |
| template<typename T, size_t NUM_ELEMENTS> |
| void swap_align_test(void (*swap_func)(T*, const T*, size_t), |
| std::function<void (T*, T*, uint64_t)> init_func) { |
| uint8_t* dst = nullptr; |
| uint8_t* src = nullptr; |
| ASSERT_EQ(0, posix_memalign(reinterpret_cast<void**>(&dst), ALIGNMENT, |
| sizeof(T) * NUM_ELEMENTS + ALIGNMENT)); |
| ASSERT_EQ(0, posix_memalign(reinterpret_cast<void**>(&src), ALIGNMENT, |
| sizeof(T) * NUM_ELEMENTS + ALIGNMENT)); |
| |
| T src_buf[NUM_ELEMENTS]; |
| T dst_buf[NUM_ELEMENTS]; |
| for (uint64_t i = 0; i < NUM_ELEMENTS; i++) { |
| init_func(&src_buf[i], &dst_buf[i], i); |
| } |
| |
| // Vary a few alignments. |
| for (size_t dst_align = 0; dst_align < ALIGNMENT; dst_align++) { |
| T* dst_aligned = reinterpret_cast<T*>(&dst[dst_align]); |
| for (size_t src_align = 0; src_align < ALIGNMENT; src_align++) { |
| T* src_aligned = reinterpret_cast<T*>(&src[src_align]); |
| memset(dst_aligned, 0, sizeof(T) * NUM_ELEMENTS); |
| memcpy(src_aligned, src_buf, sizeof(T) * NUM_ELEMENTS); |
| swap_func(dst_aligned, src_aligned, NUM_ELEMENTS); |
| ASSERT_EQ(0, memcmp(dst_buf, dst_aligned, sizeof(T) * NUM_ELEMENTS)) |
| << "Failed at dst align " << dst_align << " src align " << src_align; |
| } |
| } |
| free(dst); |
| free(src); |
| } |
| |
| TEST(libcore, swapShorts_align_test) { |
| // Use an odd number to guarantee that the last 16-bit swap code |
| // is executed. |
| swap_align_test<jshort, 9> (swapShorts, [] (jshort* src, jshort* dst, uint64_t i) { |
| *src = ((2*i) << 8) | (2*(i+1)); |
| *dst = (2*i) | ((2*(i+1)) << 8); |
| }); |
| } |
| |
| TEST(libcore, swapInts_align_test) { |
| swap_align_test<jint, 10> (swapInts, [] (jint* src, jint* dst, uint64_t i) { |
| *src = ((4*i) << 24) | ((4*(i+1)) << 16) | ((4*(i+2)) << 8) | (4*(i+3)); |
| *dst = (4*i) | ((4*(i+1)) << 8) | ((4*(i+2)) << 16) | ((4*(i+3)) << 24); |
| }); |
| } |
| |
| TEST(libcore, swapLongs_align_test) { |
| swap_align_test<jlong, 10> (swapLongs, [] (jlong* src, jlong* dst, uint64_t i) { |
| *src = ((8*i) << 56) | ((8*(i+1)) << 48) | ((8*(i+2)) << 40) | ((8*(i+3)) << 32) | |
| ((8*(i+4)) << 24) | ((8*(i+5)) << 16) | ((8*(i+6)) << 8) | (8*(i+7)); |
| *dst = (8*i) | ((8*(i+1)) << 8) | ((8*(i+2)) << 16) | ((8*(i+3)) << 24) | |
| ((8*(i+4)) << 32) | ((8*(i+5)) << 40) | ((8*(i+6)) << 48) | ((8*(i+7)) << 56); |
| }); |
| } |
| |
| template<typename T> |
| void memory_peek_test(T (*peek_func)(JNIEnv*, jclass, jlong), T value) { |
| T* src = nullptr; |
| ASSERT_EQ(0, posix_memalign(reinterpret_cast<void**>(&src), ALIGNMENT, |
| sizeof(T) + ALIGNMENT)); |
| for (size_t i = 0; i < ALIGNMENT; i++) { |
| jlong src_aligned = reinterpret_cast<jlong>(src) + i; |
| memcpy(reinterpret_cast<void*>(src_aligned), &value, sizeof(T)); |
| T result = peek_func(nullptr, nullptr, src_aligned); |
| ASSERT_EQ(value, result); |
| } |
| free(src); |
| } |
| |
| TEST(libcore, Memory_peekShortNative_align_check) { |
| memory_peek_test<jshort>(Memory_peekShortNative, 0x0102); |
| } |
| |
| TEST(libcore, Memory_peekIntNative_align_check) { |
| memory_peek_test<jint>(Memory_peekIntNative, 0x01020304); |
| } |
| |
| TEST(libcore, Memory_peekLongNative_align_check) { |
| memory_peek_test<jlong>(Memory_peekLongNative, 0x01020405060708ULL); |
| } |
| |
| template<typename T> |
| void memory_poke_test(void (*poke_func)(JNIEnv*, jclass, jlong, T), T value) { |
| T* dst = nullptr; |
| ASSERT_EQ(0, posix_memalign(reinterpret_cast<void**>(&dst), ALIGNMENT, |
| sizeof(T) + ALIGNMENT)); |
| for(size_t i = 0; i < ALIGNMENT; i++) { |
| memset(dst, 0, sizeof(T) + ALIGNMENT); |
| jlong dst_aligned = reinterpret_cast<jlong>(dst) + i; |
| poke_func(nullptr, nullptr, dst_aligned, value); |
| ASSERT_EQ(0, memcmp(reinterpret_cast<void*>(dst_aligned), &value, sizeof(T))); |
| } |
| free(dst); |
| } |
| |
| TEST(libcore, Memory_pokeShortNative_align_check) { |
| memory_poke_test<jshort>(Memory_pokeShortNative, 0x0102); |
| } |
| |
| TEST(libcore, Memory_pokeIntNative_align_check) { |
| memory_poke_test<jint>(Memory_pokeIntNative, 0x01020304); |
| } |
| |
| TEST(libcore, Memory_pokeLongNative_align_check) { |
| memory_poke_test<jlong>(Memory_pokeLongNative, 0x0102030405060708ULL); |
| } |