/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "index_bss_mapping_encoder.h"
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#include "base/enums.h"
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#include "gtest/gtest.h"
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namespace art {
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namespace linker {
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TEST(IndexBssMappingEncoder, TryMerge16BitIndex) {
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for (PointerSize pointer_size : {PointerSize::k32, PointerSize::k64}) {
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size_t raw_pointer_size = static_cast<size_t>(pointer_size);
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IndexBssMappingEncoder encoder(/* number_of_indexes */ 0x10000, raw_pointer_size);
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encoder.Reset(1u, 0u);
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ASSERT_FALSE(encoder.TryMerge(5u, raw_pointer_size + 1)); // Wrong bss_offset difference.
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ASSERT_FALSE(encoder.TryMerge(18u, raw_pointer_size)); // Index out of range.
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ASSERT_TRUE(encoder.TryMerge(5u, raw_pointer_size));
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ASSERT_EQ(0u, encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 1u, raw_pointer_size));
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ASSERT_EQ(raw_pointer_size,
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encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 5u, raw_pointer_size));
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ASSERT_EQ(IndexBssMappingLookup::npos,
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encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 17u, raw_pointer_size));
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ASSERT_FALSE(encoder.TryMerge(17u, 2 * raw_pointer_size + 1)); // Wrong bss_offset difference.
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ASSERT_FALSE(encoder.TryMerge(18u, 2 * raw_pointer_size)); // Index out of range.
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ASSERT_TRUE(encoder.TryMerge(17u, 2 * raw_pointer_size));
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ASSERT_EQ(0u, encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 1u, raw_pointer_size));
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ASSERT_EQ(raw_pointer_size,
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encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 5u, raw_pointer_size));
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ASSERT_EQ(2 * raw_pointer_size,
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encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 17u, raw_pointer_size));
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ASSERT_EQ(0x00110000u | 17u, encoder.GetEntry().index_and_mask);
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ASSERT_FALSE(encoder.TryMerge(18u, 3 * raw_pointer_size)); // Index out of range.
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}
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}
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TEST(IndexBssMappingEncoder, TryMerge8BitIndex) {
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for (PointerSize pointer_size : {PointerSize::k32, PointerSize::k64}) {
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size_t raw_pointer_size = static_cast<size_t>(pointer_size);
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IndexBssMappingEncoder encoder(/* number_of_indexes */ 0x100, raw_pointer_size);
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encoder.Reset(1u, 0u);
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ASSERT_FALSE(encoder.TryMerge(5u, raw_pointer_size + 1)); // Wrong bss_offset difference.
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ASSERT_FALSE(encoder.TryMerge(26u, raw_pointer_size)); // Index out of range.
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ASSERT_TRUE(encoder.TryMerge(5u, raw_pointer_size));
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ASSERT_EQ(0u, encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 1u, raw_pointer_size));
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ASSERT_EQ(raw_pointer_size,
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encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 5u, raw_pointer_size));
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ASSERT_EQ(IndexBssMappingLookup::npos,
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encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 17u, raw_pointer_size));
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ASSERT_FALSE(encoder.TryMerge(25u, 2 * raw_pointer_size + 1)); // Wrong bss_offset difference.
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ASSERT_FALSE(encoder.TryMerge(26u, 2 * raw_pointer_size)); // Index out of range.
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ASSERT_TRUE(encoder.TryMerge(25u, 2 * raw_pointer_size));
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ASSERT_EQ(0u, encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 1u, raw_pointer_size));
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ASSERT_EQ(raw_pointer_size,
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encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 5u, raw_pointer_size));
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ASSERT_EQ(2 * raw_pointer_size,
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encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 25u, raw_pointer_size));
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ASSERT_EQ(0x00001100u | 25u, encoder.GetEntry().index_and_mask);
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ASSERT_FALSE(encoder.TryMerge(26u, 3 * raw_pointer_size)); // Index out of range.
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}
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}
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TEST(IndexBssMappingEncoder, TryMerge20BitIndex) {
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for (PointerSize pointer_size : {PointerSize::k32, PointerSize::k64}) {
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size_t raw_pointer_size = static_cast<size_t>(pointer_size);
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IndexBssMappingEncoder encoder(/* number_of_indexes */ 0x100000, raw_pointer_size);
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encoder.Reset(1u, 0u);
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ASSERT_FALSE(encoder.TryMerge(5u, raw_pointer_size + 1)); // Wrong bss_offset difference.
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ASSERT_FALSE(encoder.TryMerge(14u, raw_pointer_size)); // Index out of range.
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ASSERT_TRUE(encoder.TryMerge(5u, raw_pointer_size));
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ASSERT_EQ(0u, encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 1u, raw_pointer_size));
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ASSERT_EQ(raw_pointer_size,
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encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 5u, raw_pointer_size));
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ASSERT_EQ(IndexBssMappingLookup::npos,
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encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 17u, raw_pointer_size));
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ASSERT_FALSE(encoder.TryMerge(13u, 2 * raw_pointer_size + 1)); // Wrong bss_offset difference.
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ASSERT_FALSE(encoder.TryMerge(14u, 2 * raw_pointer_size)); // Index out of range.
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ASSERT_TRUE(encoder.TryMerge(13u, 2 * raw_pointer_size));
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ASSERT_EQ(0u, encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 1u, raw_pointer_size));
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ASSERT_EQ(raw_pointer_size,
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encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 5u, raw_pointer_size));
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ASSERT_EQ(2 * raw_pointer_size,
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encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 13u, raw_pointer_size));
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ASSERT_EQ(0x01100000u | 13u, encoder.GetEntry().index_and_mask);
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ASSERT_FALSE(encoder.TryMerge(14u, 3 * raw_pointer_size)); // Index out of range.
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}
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}
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} // namespace linker
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} // namespace art
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