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/*
* Copyright (C) 2017 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 "index_bss_mapping_encoder.h"
#include "base/enums.h"
#include "gtest/gtest.h"
namespace art {
namespace linker {
TEST(IndexBssMappingEncoder, TryMerge16BitIndex) {
for (PointerSize pointer_size : {PointerSize::k32, PointerSize::k64}) {
size_t raw_pointer_size = static_cast<size_t>(pointer_size);
IndexBssMappingEncoder encoder(/* number_of_indexes */ 0x10000, raw_pointer_size);
encoder.Reset(1u, 0u);
ASSERT_FALSE(encoder.TryMerge(5u, raw_pointer_size + 1)); // Wrong bss_offset difference.
ASSERT_FALSE(encoder.TryMerge(18u, raw_pointer_size)); // Index out of range.
ASSERT_TRUE(encoder.TryMerge(5u, raw_pointer_size));
ASSERT_EQ(0u, encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 1u, raw_pointer_size));
ASSERT_EQ(raw_pointer_size,
encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 5u, raw_pointer_size));
ASSERT_EQ(IndexBssMappingLookup::npos,
encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 17u, raw_pointer_size));
ASSERT_FALSE(encoder.TryMerge(17u, 2 * raw_pointer_size + 1)); // Wrong bss_offset difference.
ASSERT_FALSE(encoder.TryMerge(18u, 2 * raw_pointer_size)); // Index out of range.
ASSERT_TRUE(encoder.TryMerge(17u, 2 * raw_pointer_size));
ASSERT_EQ(0u, encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 1u, raw_pointer_size));
ASSERT_EQ(raw_pointer_size,
encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 5u, raw_pointer_size));
ASSERT_EQ(2 * raw_pointer_size,
encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 17u, raw_pointer_size));
ASSERT_EQ(0x00110000u | 17u, encoder.GetEntry().index_and_mask);
ASSERT_FALSE(encoder.TryMerge(18u, 3 * raw_pointer_size)); // Index out of range.
}
}
TEST(IndexBssMappingEncoder, TryMerge8BitIndex) {
for (PointerSize pointer_size : {PointerSize::k32, PointerSize::k64}) {
size_t raw_pointer_size = static_cast<size_t>(pointer_size);
IndexBssMappingEncoder encoder(/* number_of_indexes */ 0x100, raw_pointer_size);
encoder.Reset(1u, 0u);
ASSERT_FALSE(encoder.TryMerge(5u, raw_pointer_size + 1)); // Wrong bss_offset difference.
ASSERT_FALSE(encoder.TryMerge(26u, raw_pointer_size)); // Index out of range.
ASSERT_TRUE(encoder.TryMerge(5u, raw_pointer_size));
ASSERT_EQ(0u, encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 1u, raw_pointer_size));
ASSERT_EQ(raw_pointer_size,
encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 5u, raw_pointer_size));
ASSERT_EQ(IndexBssMappingLookup::npos,
encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 17u, raw_pointer_size));
ASSERT_FALSE(encoder.TryMerge(25u, 2 * raw_pointer_size + 1)); // Wrong bss_offset difference.
ASSERT_FALSE(encoder.TryMerge(26u, 2 * raw_pointer_size)); // Index out of range.
ASSERT_TRUE(encoder.TryMerge(25u, 2 * raw_pointer_size));
ASSERT_EQ(0u, encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 1u, raw_pointer_size));
ASSERT_EQ(raw_pointer_size,
encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 5u, raw_pointer_size));
ASSERT_EQ(2 * raw_pointer_size,
encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 25u, raw_pointer_size));
ASSERT_EQ(0x00001100u | 25u, encoder.GetEntry().index_and_mask);
ASSERT_FALSE(encoder.TryMerge(26u, 3 * raw_pointer_size)); // Index out of range.
}
}
TEST(IndexBssMappingEncoder, TryMerge20BitIndex) {
for (PointerSize pointer_size : {PointerSize::k32, PointerSize::k64}) {
size_t raw_pointer_size = static_cast<size_t>(pointer_size);
IndexBssMappingEncoder encoder(/* number_of_indexes */ 0x100000, raw_pointer_size);
encoder.Reset(1u, 0u);
ASSERT_FALSE(encoder.TryMerge(5u, raw_pointer_size + 1)); // Wrong bss_offset difference.
ASSERT_FALSE(encoder.TryMerge(14u, raw_pointer_size)); // Index out of range.
ASSERT_TRUE(encoder.TryMerge(5u, raw_pointer_size));
ASSERT_EQ(0u, encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 1u, raw_pointer_size));
ASSERT_EQ(raw_pointer_size,
encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 5u, raw_pointer_size));
ASSERT_EQ(IndexBssMappingLookup::npos,
encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 17u, raw_pointer_size));
ASSERT_FALSE(encoder.TryMerge(13u, 2 * raw_pointer_size + 1)); // Wrong bss_offset difference.
ASSERT_FALSE(encoder.TryMerge(14u, 2 * raw_pointer_size)); // Index out of range.
ASSERT_TRUE(encoder.TryMerge(13u, 2 * raw_pointer_size));
ASSERT_EQ(0u, encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 1u, raw_pointer_size));
ASSERT_EQ(raw_pointer_size,
encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 5u, raw_pointer_size));
ASSERT_EQ(2 * raw_pointer_size,
encoder.GetEntry().GetBssOffset(encoder.GetIndexBits(), 13u, raw_pointer_size));
ASSERT_EQ(0x01100000u | 13u, encoder.GetEntry().index_and_mask);
ASSERT_FALSE(encoder.TryMerge(14u, 3 * raw_pointer_size)); // Index out of range.
}
}
} // namespace linker
} // namespace art
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