95 lines
3.5 KiB
C++
95 lines
3.5 KiB
C++
//===- StringTableBuilderTest.cpp -----------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/DebugInfo/PDB/Native/PDBStringTable.h"
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#include "llvm/DebugInfo/PDB/Native/PDBStringTableBuilder.h"
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#include "llvm/Support/BinaryByteStream.h"
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#include "llvm/Support/BinaryStreamReader.h"
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#include "llvm/Support/BinaryStreamWriter.h"
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#include "llvm/Testing/Support/Error.h"
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#include "gtest/gtest.h"
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using namespace llvm;
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using namespace llvm::pdb;
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using namespace llvm::support;
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TEST(StringTableBuilderTest, Simple) {
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// Create /names table contents.
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PDBStringTableBuilder Builder;
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// This test case is carefully constructed to ensure that at least one
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// string gets bucketed into slot 0, *and* to ensure that at least one
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// has a hash collision at the end of the bucket list so it has to
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// wrap around.
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uint32_t FooID = Builder.insert("foo");
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uint32_t BarID = Builder.insert("bar");
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uint32_t BazID = Builder.insert("baz");
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uint32_t BuzzID = Builder.insert("buzz");
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uint32_t BazzID = Builder.insert("bazz");
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uint32_t BarrID = Builder.insert("barr");
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// Re-inserting the same item should return the same id.
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EXPECT_EQ(FooID, Builder.insert("foo"));
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EXPECT_EQ(BarID, Builder.insert("bar"));
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EXPECT_EQ(BazID, Builder.insert("baz"));
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EXPECT_EQ(BuzzID, Builder.insert("buzz"));
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EXPECT_EQ(BazzID, Builder.insert("bazz"));
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EXPECT_EQ(BarrID, Builder.insert("barr"));
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// Each ID should be distinct.
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std::set<uint32_t> Distinct{FooID, BarID, BazID, BuzzID, BazzID, BarrID};
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EXPECT_EQ(6U, Distinct.size());
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std::vector<uint8_t> Buffer(Builder.calculateSerializedSize());
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MutableBinaryByteStream OutStream(Buffer, little);
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BinaryStreamWriter Writer(OutStream);
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EXPECT_THAT_ERROR(Builder.commit(Writer), Succeeded());
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// Reads the contents back.
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BinaryByteStream InStream(Buffer, little);
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BinaryStreamReader Reader(InStream);
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PDBStringTable Table;
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EXPECT_THAT_ERROR(Table.reload(Reader), Succeeded());
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EXPECT_EQ(6U, Table.getNameCount());
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EXPECT_EQ(1U, Table.getHashVersion());
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EXPECT_THAT_EXPECTED(Table.getStringForID(FooID), HasValue("foo"));
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EXPECT_THAT_EXPECTED(Table.getStringForID(BarID), HasValue("bar"));
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EXPECT_THAT_EXPECTED(Table.getStringForID(BazID), HasValue("baz"));
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EXPECT_THAT_EXPECTED(Table.getStringForID(BuzzID), HasValue("buzz"));
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EXPECT_THAT_EXPECTED(Table.getStringForID(BazzID), HasValue("bazz"));
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EXPECT_THAT_EXPECTED(Table.getStringForID(BarrID), HasValue("barr"));
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EXPECT_THAT_EXPECTED(Table.getIDForString("foo"), HasValue(FooID));
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EXPECT_THAT_EXPECTED(Table.getIDForString("bar"), HasValue(BarID));
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EXPECT_THAT_EXPECTED(Table.getIDForString("baz"), HasValue(BazID));
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EXPECT_THAT_EXPECTED(Table.getIDForString("buzz"), HasValue(BuzzID));
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EXPECT_THAT_EXPECTED(Table.getIDForString("bazz"), HasValue(BazzID));
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EXPECT_THAT_EXPECTED(Table.getIDForString("barr"), HasValue(BarrID));
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}
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TEST(StringTableHashTraitsTest, Simple) {
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PDBStringTableBuilder Builder;
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// Create more than 64kiB of dummy entries.
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for (int i = 0; i < 320; ++i) {
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std::string aaaaa = std::string(220, 'a') + std::to_string(i);
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Builder.insert(aaaaa);
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}
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std::string S = "foo.natvis";
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uint32_t Pos = Builder.insert(S);
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EXPECT_GT(Pos, 0xFFFFu);
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StringTableHashTraits Traits(Builder);
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EXPECT_LE(Traits.hashLookupKey(S), 0xFFFFu);
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}
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