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//===- llvm/unittest/DebugInfo/CodeView/TypeHashingTest.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/TypeHashing.h"
#include "llvm/DebugInfo/CodeView/AppendingTypeTableBuilder.h"
#include "llvm/DebugInfo/CodeView/TypeRecord.h"
#include "gtest/gtest.h"
using namespace llvm;
using namespace llvm::codeview;
static TypeIndex createPointerRecord(AppendingTypeTableBuilder &Builder,
TypeIndex TI) {
PointerRecord PR(TypeRecordKind::Pointer);
PR.setAttrs(PointerKind::Near32, PointerMode::Pointer, PointerOptions::None,
4);
PR.ReferentType = TI;
return Builder.writeLeafType(PR);
}
static TypeIndex createArgListRecord(AppendingTypeTableBuilder &Builder,
TypeIndex Q, TypeIndex R) {
ArgListRecord AR(TypeRecordKind::ArgList);
AR.ArgIndices.push_back(Q);
AR.ArgIndices.push_back(R);
return Builder.writeLeafType(AR);
}
static TypeIndex createProcedureRecord(AppendingTypeTableBuilder &Builder,
uint32_t ParamCount, TypeIndex Return,
TypeIndex ArgList) {
ProcedureRecord PR(TypeRecordKind::Procedure);
PR.ArgumentList = ArgList;
PR.CallConv = CallingConvention::NearC;
PR.Options = FunctionOptions::None;
PR.ParameterCount = ParamCount;
PR.ReturnType = Return;
return Builder.writeLeafType(PR);
}
static ArrayRef<uint8_t> hash_of(ArrayRef<GloballyHashedType> Hashes,
TypeIndex TI) {
return Hashes[TI.toArrayIndex()].Hash;
}
static void verifyHashUniqueness(ArrayRef<GloballyHashedType> Hashes) {
assert(!Hashes.empty());
for (size_t I = 0; I < Hashes.size() - 1; ++I) {
for (size_t J = I + 1; J < Hashes.size(); ++J) {
EXPECT_NE(Hashes[I].Hash, Hashes[J].Hash);
}
}
}
TEST(TypeHashingTest, ContentHash) {
SimpleTypeSerializer Serializer;
TypeIndex CharStar(SimpleTypeKind::SignedCharacter,
SimpleTypeMode::NearPointer32);
BumpPtrAllocator Alloc;
AppendingTypeTableBuilder Ordering1(Alloc);
AppendingTypeTableBuilder Ordering2(Alloc);
TypeIndex CharP(SimpleTypeKind::SignedCharacter, SimpleTypeMode::NearPointer);
TypeIndex IntP(SimpleTypeKind::Int32, SimpleTypeMode::NearPointer);
TypeIndex DoubleP(SimpleTypeKind::Float64, SimpleTypeMode::NearPointer);
// We're going to the same type sequence with two different orderings, and
// then confirm all records are hashed the same.
TypeIndex CharPP[2];
TypeIndex IntPP[2];
TypeIndex IntPPP[2];
TypeIndex DoublePP[2];
TypeIndex Args[2];
TypeIndex Proc[2];
// Ordering 1
// ----------------------------------------
// LF_POINTER 0x1000 {char**}
// Referent = char*
// LF_POINTER 0x1001 {int**}
// Referent = int*
// LF_POINTER 0x1002 {int***}
// Referent = 0x1001
// LF_ARGLIST 0x1003 {(char**, int***)}
// Arg[0] = 0x1000
// Arg[1] = 0x1002
// LF_PROCEDURE 0x1004 {int** func(char**, int***)}
// ArgList = 0x1003
// ReturnType = 0x1001
std::vector<GloballyHashedType> Ordering1Hashes;
CharPP[0] = createPointerRecord(Ordering1, CharP);
IntPP[0] = createPointerRecord(Ordering1, IntP);
IntPPP[0] = createPointerRecord(Ordering1, IntPP[0]);
Args[0] = createArgListRecord(Ordering1, CharPP[0], IntPPP[0]);
Proc[0] = createProcedureRecord(Ordering1, 2, IntPP[0], Args[0]);
ASSERT_EQ(0x1000U, CharPP[0].getIndex());
ASSERT_EQ(0x1001U, IntPP[0].getIndex());
ASSERT_EQ(0x1002U, IntPPP[0].getIndex());
ASSERT_EQ(0x1003U, Args[0].getIndex());
ASSERT_EQ(0x1004U, Proc[0].getIndex());
auto Hashes1 = GloballyHashedType::hashTypes(Ordering1.records());
// Ordering 2
// ----------------------------------------
// LF_POINTER 0x1000 {int**}
// Referent = int*
// LF_POINTER 0x1001 {int***}
// Referent = 0x1000
// LF_POINTER 0x1002 {char**}
// Referent = char*
// LF_POINTER 0x1003 {double**}
// Referent = double*
// LF_ARGLIST 0x1004 {(char**, int***)}
// Arg[0] = 0x1002
// Arg[1] = 0x1001
// LF_PROCEDURE 0x1005 {int** func(char**, int***)}
// ArgList = 0x1004
// ReturnType = 0x1000
IntPP[1] = createPointerRecord(Ordering2, IntP);
IntPPP[1] = createPointerRecord(Ordering2, IntPP[1]);
CharPP[1] = createPointerRecord(Ordering2, CharP);
DoublePP[1] = createPointerRecord(Ordering2, DoubleP);
Args[1] = createArgListRecord(Ordering2, CharPP[1], IntPPP[1]);
Proc[1] = createProcedureRecord(Ordering2, 2, IntPP[1], Args[1]);
auto Hashes2 = GloballyHashedType::hashTypes(Ordering2.records());
ASSERT_EQ(0x1000U, IntPP[1].getIndex());
ASSERT_EQ(0x1001U, IntPPP[1].getIndex());
ASSERT_EQ(0x1002U, CharPP[1].getIndex());
ASSERT_EQ(0x1003U, DoublePP[1].getIndex());
ASSERT_EQ(0x1004U, Args[1].getIndex());
ASSERT_EQ(0x1005U, Proc[1].getIndex());
// Sanity check to make sure all same-ordering hashes are different
// from each other.
verifyHashUniqueness(Hashes1);
verifyHashUniqueness(Hashes2);
EXPECT_EQ(hash_of(Hashes1, IntPP[0]), hash_of(Hashes2, IntPP[1]));
EXPECT_EQ(hash_of(Hashes1, IntPPP[0]), hash_of(Hashes2, IntPPP[1]));
EXPECT_EQ(hash_of(Hashes1, CharPP[0]), hash_of(Hashes2, CharPP[1]));
EXPECT_EQ(hash_of(Hashes1, Args[0]), hash_of(Hashes2, Args[1]));
EXPECT_EQ(hash_of(Hashes1, Proc[0]), hash_of(Hashes2, Proc[1]));
}
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