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llvm-project/llvm/unittests/DebugInfo/CodeView/RandomAccessVisitorTest.cpp

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//===- llvm/unittest/DebugInfo/CodeView/RandomAccessVisitorTest.cpp -------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/DebugInfo/CodeView/AppendingTypeTableBuilder.h"
#include "llvm/DebugInfo/CodeView/CVTypeVisitor.h"
#include "llvm/DebugInfo/CodeView/LazyRandomTypeCollection.h"
#include "llvm/DebugInfo/CodeView/TypeRecord.h"
#include "llvm/DebugInfo/CodeView/TypeRecordMapping.h"
#include "llvm/DebugInfo/CodeView/TypeVisitorCallbacks.h"
#include "llvm/DebugInfo/PDB/Native/RawTypes.h"
#include "llvm/Support/Allocator.h"
#include "llvm/Support/BinaryByteStream.h"
#include "llvm/Support/BinaryItemStream.h"
#include "llvm/Support/Error.h"
#include "llvm/Testing/Support/Error.h"
#include "gtest/gtest.h"
using namespace llvm;
using namespace llvm::codeview;
using namespace llvm::pdb;
namespace llvm {
namespace codeview {
inline bool operator==(const ArrayRecord &R1, const ArrayRecord &R2) {
if (R1.ElementType != R2.ElementType)
return false;
if (R1.IndexType != R2.IndexType)
return false;
if (R1.Name != R2.Name)
return false;
if (R1.Size != R2.Size)
return false;
return true;
}
inline bool operator!=(const ArrayRecord &R1, const ArrayRecord &R2) {
return !(R1 == R2);
}
inline bool operator==(const CVType &R1, const CVType &R2) {
if (R1.RecordData != R2.RecordData)
return false;
return true;
}
inline bool operator!=(const CVType &R1, const CVType &R2) {
return !(R1 == R2);
}
}
}
namespace llvm {
template <> struct BinaryItemTraits<CVType> {
static size_t length(const CVType &Item) { return Item.length(); }
static ArrayRef<uint8_t> bytes(const CVType &Item) { return Item.data(); }
};
}
namespace {
class MockCallbacks : public TypeVisitorCallbacks {
public:
virtual Error visitTypeBegin(CVType &CVR, TypeIndex Index) {
Indices.push_back(Index);
return Error::success();
}
virtual Error visitKnownRecord(CVType &CVR, ArrayRecord &AR) {
VisitedRecords.push_back(AR);
RawRecords.push_back(CVR);
return Error::success();
}
uint32_t count() const {
assert(Indices.size() == RawRecords.size());
assert(Indices.size() == VisitedRecords.size());
return Indices.size();
}
std::vector<TypeIndex> Indices;
std::vector<CVType> RawRecords;
std::vector<ArrayRecord> VisitedRecords;
};
class RandomAccessVisitorTest : public testing::Test {
public:
RandomAccessVisitorTest() {}
static void SetUpTestCase() {
GlobalState = std::make_unique<GlobalTestState>();
AppendingTypeTableBuilder Builder(GlobalState->Allocator);
uint32_t Offset = 0;
for (int I = 0; I < 11; ++I) {
ArrayRecord AR(TypeRecordKind::Array);
AR.ElementType = TypeIndex::Int32();
AR.IndexType = TypeIndex::UInt32();
AR.Size = I;
std::string Name;
raw_string_ostream Stream(Name);
Stream << "Array [" << I << "]";
AR.Name = GlobalState->Strings.save(Stream.str());
GlobalState->Records.push_back(AR);
GlobalState->Indices.push_back(Builder.writeLeafType(AR));
CVType Type(Builder.records().back());
GlobalState->TypeVector.push_back(Type);
GlobalState->AllOffsets.push_back(
{GlobalState->Indices.back(), ulittle32_t(Offset)});
Offset += Type.length();
}
GlobalState->ItemStream.setItems(GlobalState->TypeVector);
GlobalState->TypeArray = VarStreamArray<CVType>(GlobalState->ItemStream);
}
static void TearDownTestCase() { GlobalState.reset(); }
void SetUp() override {
TestState = std::make_unique<PerTestState>();
}
void TearDown() override { TestState.reset(); }
protected:
bool ValidateDatabaseRecord(LazyRandomTypeCollection &Types, uint32_t Index) {
TypeIndex TI = TypeIndex::fromArrayIndex(Index);
if (!Types.contains(TI))
return false;
if (GlobalState->TypeVector[Index] != Types.getType(TI))
return false;
return true;
}
bool ValidateVisitedRecord(uint32_t VisitationOrder,
uint32_t GlobalArrayIndex) {
TypeIndex TI = TypeIndex::fromArrayIndex(GlobalArrayIndex);
if (TI != TestState->Callbacks.Indices[VisitationOrder])
return false;
if (GlobalState->TypeVector[TI.toArrayIndex()] !=
TestState->Callbacks.RawRecords[VisitationOrder])
return false;
if (GlobalState->Records[TI.toArrayIndex()] !=
TestState->Callbacks.VisitedRecords[VisitationOrder])
return false;
return true;
}
struct GlobalTestState {
GlobalTestState() : Strings(Allocator), ItemStream(llvm::support::little) {}
BumpPtrAllocator Allocator;
StringSaver Strings;
std::vector<ArrayRecord> Records;
std::vector<TypeIndex> Indices;
std::vector<TypeIndexOffset> AllOffsets;
std::vector<CVType> TypeVector;
BinaryItemStream<CVType> ItemStream;
VarStreamArray<CVType> TypeArray;
MutableBinaryByteStream Stream;
};
struct PerTestState {
FixedStreamArray<TypeIndexOffset> Offsets;
MockCallbacks Callbacks;
};
FixedStreamArray<TypeIndexOffset>
createPartialOffsets(MutableBinaryByteStream &Storage,
std::initializer_list<uint32_t> Indices) {
uint32_t Count = Indices.size();
uint32_t Size = Count * sizeof(TypeIndexOffset);
uint8_t *Buffer = GlobalState->Allocator.Allocate<uint8_t>(Size);
MutableArrayRef<uint8_t> Bytes(Buffer, Size);
Storage = MutableBinaryByteStream(Bytes, support::little);
BinaryStreamWriter Writer(Storage);
for (const auto I : Indices)
consumeError(Writer.writeObject(GlobalState->AllOffsets[I]));
BinaryStreamReader Reader(Storage);
FixedStreamArray<TypeIndexOffset> Result;
consumeError(Reader.readArray(Result, Count));
return Result;
}
static std::unique_ptr<GlobalTestState> GlobalState;
std::unique_ptr<PerTestState> TestState;
};
std::unique_ptr<RandomAccessVisitorTest::GlobalTestState>
RandomAccessVisitorTest::GlobalState;
}
TEST_F(RandomAccessVisitorTest, MultipleVisits) {
TestState->Offsets = createPartialOffsets(GlobalState->Stream, {0, 8});
LazyRandomTypeCollection Types(GlobalState->TypeArray,
GlobalState->TypeVector.size(),
TestState->Offsets);
std::vector<uint32_t> IndicesToVisit = {5, 5, 5};
for (uint32_t I : IndicesToVisit) {
TypeIndex TI = TypeIndex::fromArrayIndex(I);
CVType T = Types.getType(TI);
EXPECT_THAT_ERROR(codeview::visitTypeRecord(T, TI, TestState->Callbacks),
Succeeded());
}
// [0,8) should be present
EXPECT_EQ(8u, Types.size());
for (uint32_t I = 0; I < 8; ++I)
EXPECT_TRUE(ValidateDatabaseRecord(Types, I));
// 5, 5, 5
EXPECT_EQ(3u, TestState->Callbacks.count());
for (auto I : enumerate(IndicesToVisit))
EXPECT_TRUE(ValidateVisitedRecord(I.index(), I.value()));
}
TEST_F(RandomAccessVisitorTest, DescendingWithinChunk) {
// Visit multiple items from the same "chunk" in reverse order. In this
// example, it's 7 then 4 then 2. At the end, all records from 0 to 7 should
// be known by the database, but only 2, 4, and 7 should have been visited.
TestState->Offsets = createPartialOffsets(GlobalState->Stream, {0, 8});
std::vector<uint32_t> IndicesToVisit = {7, 4, 2};
LazyRandomTypeCollection Types(GlobalState->TypeArray,
GlobalState->TypeVector.size(),
TestState->Offsets);
for (uint32_t I : IndicesToVisit) {
TypeIndex TI = TypeIndex::fromArrayIndex(I);
CVType T = Types.getType(TI);
EXPECT_THAT_ERROR(codeview::visitTypeRecord(T, TI, TestState->Callbacks),
Succeeded());
}
// [0, 7]
EXPECT_EQ(8u, Types.size());
for (uint32_t I = 0; I < 8; ++I)
EXPECT_TRUE(ValidateDatabaseRecord(Types, I));
// 2, 4, 7
EXPECT_EQ(3u, TestState->Callbacks.count());
for (auto I : enumerate(IndicesToVisit))
EXPECT_TRUE(ValidateVisitedRecord(I.index(), I.value()));
}
TEST_F(RandomAccessVisitorTest, AscendingWithinChunk) {
// * Visit multiple items from the same chunk in ascending order, ensuring
// that intermediate items are not visited. In the below example, it's
// 5 -> 6 -> 7 which come from the [4,8) chunk.
TestState->Offsets = createPartialOffsets(GlobalState->Stream, {0, 8});
std::vector<uint32_t> IndicesToVisit = {2, 4, 7};
LazyRandomTypeCollection Types(GlobalState->TypeArray,
GlobalState->TypeVector.size(),
TestState->Offsets);
for (uint32_t I : IndicesToVisit) {
TypeIndex TI = TypeIndex::fromArrayIndex(I);
CVType T = Types.getType(TI);
EXPECT_THAT_ERROR(codeview::visitTypeRecord(T, TI, TestState->Callbacks),
Succeeded());
}
// [0, 7]
EXPECT_EQ(8u, Types.size());
for (uint32_t I = 0; I < 8; ++I)
EXPECT_TRUE(ValidateDatabaseRecord(Types, I));
// 2, 4, 7
EXPECT_EQ(3u, TestState->Callbacks.count());
for (auto &I : enumerate(IndicesToVisit))
EXPECT_TRUE(ValidateVisitedRecord(I.index(), I.value()));
}
TEST_F(RandomAccessVisitorTest, StopPrematurelyInChunk) {
// * Don't visit the last item in one chunk, ensuring that visitation stops
// at the record you specify, and the chunk is only partially visited.
// In the below example, this is tested by visiting 0 and 1 but not 2,
// all from the [0,3) chunk.
TestState->Offsets = createPartialOffsets(GlobalState->Stream, {0, 8});
std::vector<uint32_t> IndicesToVisit = {0, 1, 2};
LazyRandomTypeCollection Types(GlobalState->TypeArray,
GlobalState->TypeVector.size(),
TestState->Offsets);
for (uint32_t I : IndicesToVisit) {
TypeIndex TI = TypeIndex::fromArrayIndex(I);
CVType T = Types.getType(TI);
EXPECT_THAT_ERROR(codeview::visitTypeRecord(T, TI, TestState->Callbacks),
Succeeded());
}
// [0, 8) should be visited.
EXPECT_EQ(8u, Types.size());
for (uint32_t I = 0; I < 8; ++I)
EXPECT_TRUE(ValidateDatabaseRecord(Types, I));
// [0, 2]
EXPECT_EQ(3u, TestState->Callbacks.count());
for (auto I : enumerate(IndicesToVisit))
EXPECT_TRUE(ValidateVisitedRecord(I.index(), I.value()));
}
TEST_F(RandomAccessVisitorTest, InnerChunk) {
// Test that when a request comes from a chunk in the middle of the partial
// offsets array, that items from surrounding chunks are not visited or
// added to the database.
TestState->Offsets = createPartialOffsets(GlobalState->Stream, {0, 4, 9});
std::vector<uint32_t> IndicesToVisit = {5, 7};
LazyRandomTypeCollection Types(GlobalState->TypeArray,
GlobalState->TypeVector.size(),
TestState->Offsets);
for (uint32_t I : IndicesToVisit) {
TypeIndex TI = TypeIndex::fromArrayIndex(I);
CVType T = Types.getType(TI);
EXPECT_THAT_ERROR(codeview::visitTypeRecord(T, TI, TestState->Callbacks),
Succeeded());
}
// [4, 9)
EXPECT_EQ(5u, Types.size());
for (uint32_t I = 4; I < 9; ++I)
EXPECT_TRUE(ValidateDatabaseRecord(Types, I));
// 5, 7
EXPECT_EQ(2u, TestState->Callbacks.count());
for (auto &I : enumerate(IndicesToVisit))
EXPECT_TRUE(ValidateVisitedRecord(I.index(), I.value()));
}
TEST_F(RandomAccessVisitorTest, CrossChunkName) {
AppendingTypeTableBuilder Builder(GlobalState->Allocator);
// TypeIndex 0
ClassRecord Class(TypeRecordKind::Class);
Class.Name = "FooClass";
Class.Options = ClassOptions::None;
Class.MemberCount = 0;
Class.Size = 4U;
Class.DerivationList = TypeIndex::fromArrayIndex(0);
Class.FieldList = TypeIndex::fromArrayIndex(0);
Class.VTableShape = TypeIndex::fromArrayIndex(0);
TypeIndex IndexZero = Builder.writeLeafType(Class);
// TypeIndex 1 refers to type index 0.
ModifierRecord Modifier(TypeRecordKind::Modifier);
Modifier.ModifiedType = TypeIndex::fromArrayIndex(0);
Modifier.Modifiers = ModifierOptions::Const;
TypeIndex IndexOne = Builder.writeLeafType(Modifier);
// set up a type stream that refers to the above two serialized records.
std::vector<CVType> TypeArray = {
{Builder.records()[0]},
{Builder.records()[1]},
};
BinaryItemStream<CVType> ItemStream(llvm::support::little);
ItemStream.setItems(TypeArray);
VarStreamArray<CVType> TypeStream(ItemStream);
// Figure out the byte offset of the second item.
auto ItemOneIter = TypeStream.begin();
++ItemOneIter;
// Set up a partial offsets buffer that contains the first and second items
// in separate chunks.
std::vector<TypeIndexOffset> TIO;
TIO.push_back({IndexZero, ulittle32_t(0u)});
TIO.push_back({IndexOne, ulittle32_t(ItemOneIter.offset())});
ArrayRef<uint8_t> Buffer(reinterpret_cast<const uint8_t *>(TIO.data()),
TIO.size() * sizeof(TypeIndexOffset));
BinaryStreamReader Reader(Buffer, llvm::support::little);
FixedStreamArray<TypeIndexOffset> PartialOffsets;
ASSERT_THAT_ERROR(Reader.readArray(PartialOffsets, 2), Succeeded());
LazyRandomTypeCollection Types(TypeStream, 2, PartialOffsets);
StringRef Name = Types.getTypeName(IndexOne);
EXPECT_EQ("const FooClass", Name);
}
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