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llvm-mirror/tools/llvm-pdbutil/Diff.cpp
Zachary Turner 705723b1f5 [llvm-pdbutil] Allow diff to force module equivalencies. 
Sometimes the normal module equivalence detection algorithm doesn't
quite work.  For example, you might build the same program with
MSVC and clang-cl, outputting to different object files, exes, and
PDBs, then compare them.  If the object files have different names
though, then they won't be treated as equivalent.  This way we
can force specific module indices to be treated as equivalent.

llvm-svn: 309983
2017-08-03 20:30:09 +00:00

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//===- Diff.cpp - PDB diff utility ------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "Diff.h"
#include "DiffPrinter.h"
#include "FormatUtil.h"
#include "StreamUtil.h"
#include "llvm-pdbutil.h"
#include "llvm/ADT/StringSet.h"
#include "llvm/DebugInfo/PDB/Native/DbiStream.h"
#include "llvm/DebugInfo/PDB/Native/Formatters.h"
#include "llvm/DebugInfo/PDB/Native/InfoStream.h"
#include "llvm/DebugInfo/PDB/Native/PDBFile.h"
#include "llvm/DebugInfo/PDB/Native/PDBStringTable.h"
#include "llvm/DebugInfo/PDB/Native/RawConstants.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/FormatAdapters.h"
#include "llvm/Support/FormatProviders.h"
#include "llvm/Support/FormatVariadic.h"
#include "llvm/Support/Path.h"
using namespace llvm;
using namespace llvm::pdb;
namespace {
// Compare and format two stream numbers. Stream numbers are considered
// identical if they contain the same value, equivalent if they are both
// the invalid stream or neither is the invalid stream, and different if
// one is the invalid stream and another isn't.
struct StreamNumberProvider {
static DiffResult compare(uint16_t L, uint16_t R) {
if (L == R)
return DiffResult::IDENTICAL;
bool LP = L != kInvalidStreamIndex;
bool RP = R != kInvalidStreamIndex;
if (LP != RP)
return DiffResult::DIFFERENT;
return DiffResult::EQUIVALENT;
}
static std::string format(uint16_t SN, bool Right) {
if (SN == kInvalidStreamIndex)
return "(not present)";
return formatv("{0}", SN).str();
}
};
// Compares and formats two module indices. Modis are considered identical
// if they are identical, equivalent if they either both contain a value or
// both don't contain a value, and different if one contains a value and the
// other doesn't.
struct ModiProvider {
DiffResult compare(Optional<uint32_t> L, Optional<uint32_t> R) {
if (L == R)
return DiffResult::IDENTICAL;
if (L.hasValue() != R.hasValue())
return DiffResult::DIFFERENT;
return DiffResult::EQUIVALENT;
}
std::string format(Optional<uint32_t> Modi, bool Right) {
if (!Modi.hasValue())
return "(not present)";
return formatv("{0}", *Modi).str();
}
};
// Compares and formats two paths embedded in the PDB, ignoring the beginning
// of the path if the user specified it as a "root path" on the command line.
struct BinaryPathProvider {
explicit BinaryPathProvider(uint32_t MaxLen) : MaxLen(MaxLen) {}
DiffResult compare(StringRef L, StringRef R) {
if (L == R)
return DiffResult::IDENTICAL;
SmallString<64> LN = removeRoot(L, false);
SmallString<64> RN = removeRoot(R, true);
return (LN.equals_lower(RN)) ? DiffResult::EQUIVALENT
: DiffResult::DIFFERENT;
}
std::string format(StringRef S, bool Right) {
if (S.empty())
return "(empty)";
SmallString<64> Native = removeRoot(S, Right);
return truncateStringFront(Native.str(), MaxLen);
}
SmallString<64> removeRoot(StringRef Path, bool IsRight) const {
SmallString<64> Native(Path);
auto &RootOpt = IsRight ? opts::diff::RightRoot : opts::diff::LeftRoot;
SmallString<64> Root(static_cast<std::string>(RootOpt));
// pdb paths always use windows syntax, convert slashes to backslashes.
sys::path::native(Root, sys::path::Style::windows);
if (sys::path::has_stem(Root, sys::path::Style::windows))
sys::path::append(Root, sys::path::Style::windows,
sys::path::get_separator(sys::path::Style::windows));
sys::path::replace_path_prefix(Native, Root, "", sys::path::Style::windows);
return Native;
}
uint32_t MaxLen;
};
// Compare and format two stream purposes. For general streams, this just
// compares the description. For module streams it uses the path comparison
// algorithm taking into consideration the binary root, described above.
// Formatting stream purposes just prints the stream purpose, except for
// module streams and named streams, where it prefixes the name / module
// with an identifier. Example:
//
// Named Stream "\names"
// Module Stream "foo.obj"
//
// If a named stream is too long to fit in a column, it is truncated at the
// end, and if a module is too long to fit in a column, it is truncated at the
// beginning. Example:
//
// Named Stream "\Really Long Str..."
// Module Stream "...puts\foo.obj"
//
struct StreamPurposeProvider {
explicit StreamPurposeProvider(uint32_t MaxLen) : MaxLen(MaxLen) {}
DiffResult compare(const std::pair<StreamPurpose, std::string> &L,
const std::pair<StreamPurpose, std::string> &R) {
if (L.first != R.first)
return DiffResult::DIFFERENT;
if (L.first == StreamPurpose::ModuleStream) {
BinaryPathProvider PathProvider(MaxLen);
return PathProvider.compare(L.second, R.second);
}
return (L.second == R.second) ? DiffResult::IDENTICAL
: DiffResult::DIFFERENT;
}
std::string format(const std::pair<StreamPurpose, std::string> &P,
bool Right) {
if (P.first == StreamPurpose::Other)
return truncateStringBack(P.second, MaxLen);
if (P.first == StreamPurpose::NamedStream)
return truncateQuotedNameBack("Named Stream", P.second, MaxLen);
assert(P.first == StreamPurpose::ModuleStream);
uint32_t ExtraChars = strlen("Module \"\"");
BinaryPathProvider PathProvider(MaxLen - ExtraChars);
std::string Result = PathProvider.format(P.second, Right);
return formatv("Module \"{0}\"", Result);
}
uint32_t MaxLen;
};
} // namespace
namespace llvm {
template <> struct format_provider<PdbRaw_FeatureSig> {
static void format(const PdbRaw_FeatureSig &Sig, raw_ostream &Stream,
StringRef Style) {
switch (Sig) {
case PdbRaw_FeatureSig::MinimalDebugInfo:
Stream << "MinimalDebugInfo";
break;
case PdbRaw_FeatureSig::NoTypeMerge:
Stream << "NoTypeMerge";
break;
case PdbRaw_FeatureSig::VC110:
Stream << "VC110";
break;
case PdbRaw_FeatureSig::VC140:
Stream << "VC140";
break;
}
}
};
}
template <typename R> using ValueOfRange = llvm::detail::ValueOfRange<R>;
DiffStyle::DiffStyle(PDBFile &File1, PDBFile &File2)
: File1(File1), File2(File2) {}
Error DiffStyle::dump() {
if (auto EC = diffSuperBlock())
return EC;
if (auto EC = diffFreePageMap())
return EC;
if (auto EC = diffStreamDirectory())
return EC;
if (auto EC = diffStringTable())
return EC;
if (auto EC = diffInfoStream())
return EC;
if (auto EC = diffDbiStream())
return EC;
if (auto EC = diffSectionContribs())
return EC;
if (auto EC = diffSectionMap())
return EC;
if (auto EC = diffFpoStream())
return EC;
if (auto EC = diffTpiStream(StreamTPI))
return EC;
if (auto EC = diffTpiStream(StreamIPI))
return EC;
if (auto EC = diffPublics())
return EC;
if (auto EC = diffGlobals())
return EC;
return Error::success();
}
Error DiffStyle::diffSuperBlock() {
DiffPrinter D(2, "MSF Super Block", 16, 20, opts::diff::PrintResultColumn,
opts::diff::PrintValueColumns, outs());
D.printExplicit("File", DiffResult::UNSPECIFIED,
truncateStringFront(File1.getFilePath(), 18),
truncateStringFront(File2.getFilePath(), 18));
D.print("Block Size", File1.getBlockSize(), File2.getBlockSize());
D.print("Block Count", File1.getBlockCount(), File2.getBlockCount());
D.print("Unknown 1", File1.getUnknown1(), File2.getUnknown1());
D.print("Directory Size", File1.getNumDirectoryBytes(),
File2.getNumDirectoryBytes());
return Error::success();
}
Error DiffStyle::diffStreamDirectory() {
DiffPrinter D(2, "Stream Directory", 30, 20, opts::diff::PrintResultColumn,
opts::diff::PrintValueColumns, outs());
D.printExplicit("File", DiffResult::UNSPECIFIED,
truncateStringFront(File1.getFilePath(), 18),
truncateStringFront(File2.getFilePath(), 18));
SmallVector<std::pair<StreamPurpose, std::string>, 32> P;
SmallVector<std::pair<StreamPurpose, std::string>, 32> Q;
discoverStreamPurposes(File1, P);
discoverStreamPurposes(File2, Q);
D.print("Stream Count", File1.getNumStreams(), File2.getNumStreams());
auto PI = to_vector<32>(enumerate(P));
auto QI = to_vector<32>(enumerate(Q));
// Scan all streams in the left hand side, looking for ones that are also
// in the right. Each time we find one, remove it. When we're done, Q
// should contain all the streams that are in the right but not in the left.
StreamPurposeProvider StreamProvider(28);
for (const auto &P : PI) {
typedef decltype(PI) ContainerType;
typedef typename ContainerType::value_type value_type;
auto Iter = llvm::find_if(QI, [P, &StreamProvider](const value_type &V) {
DiffResult Result = StreamProvider.compare(P.value(), V.value());
return Result == DiffResult::EQUIVALENT ||
Result == DiffResult::IDENTICAL;
});
if (Iter == QI.end()) {
D.printExplicit(StreamProvider.format(P.value(), false),
DiffResult::DIFFERENT, P.index(), "(not present)");
continue;
}
D.print<EquivalentDiffProvider>(StreamProvider.format(P.value(), false),
P.index(), Iter->index());
QI.erase(Iter);
}
for (const auto &Q : QI) {
D.printExplicit(StreamProvider.format(Q.value(), true),
DiffResult::DIFFERENT, "(not present)", Q.index());
}
return Error::success();
}
Error DiffStyle::diffStringTable() {
DiffPrinter D(2, "String Table", 30, 20, opts::diff::PrintResultColumn,
opts::diff::PrintValueColumns, outs());
D.printExplicit("File", DiffResult::UNSPECIFIED,
truncateStringFront(File1.getFilePath(), 18),
truncateStringFront(File2.getFilePath(), 18));
auto ExpectedST1 = File1.getStringTable();
auto ExpectedST2 = File2.getStringTable();
bool Has1 = !!ExpectedST1;
bool Has2 = !!ExpectedST2;
std::string Count1 = Has1 ? llvm::utostr(ExpectedST1->getNameCount())
: "(string table not present)";
std::string Count2 = Has2 ? llvm::utostr(ExpectedST2->getNameCount())
: "(string table not present)";
D.print("Number of Strings", Count1, Count2);
if (!Has1 || !Has2) {
consumeError(ExpectedST1.takeError());
consumeError(ExpectedST2.takeError());
return Error::success();
}
auto &ST1 = *ExpectedST1;
auto &ST2 = *ExpectedST2;
D.print("Hash Version", ST1.getHashVersion(), ST2.getHashVersion());
D.print("Byte Size", ST1.getByteSize(), ST2.getByteSize());
D.print("Signature", ST1.getSignature(), ST2.getSignature());
// Both have a valid string table, dive in and compare individual strings.
auto IdList1 = ST1.name_ids();
auto IdList2 = ST2.name_ids();
StringSet<> LS;
StringSet<> RS;
uint32_t Empty1 = 0;
uint32_t Empty2 = 0;
for (auto ID : IdList1) {
auto S = ST1.getStringForID(ID);
if (!S)
return S.takeError();
if (S->empty())
++Empty1;
else
LS.insert(*S);
}
for (auto ID : IdList2) {
auto S = ST2.getStringForID(ID);
if (!S)
return S.takeError();
if (S->empty())
++Empty2;
else
RS.insert(*S);
}
D.print("Empty Strings", Empty1, Empty2);
for (const auto &S : LS) {
auto R = RS.find(S.getKey());
std::string Truncated = truncateStringMiddle(S.getKey(), 28);
uint32_t I = cantFail(ST1.getIDForString(S.getKey()));
if (R == RS.end()) {
D.printExplicit(Truncated, DiffResult::DIFFERENT, I, "(not present)");
continue;
}
uint32_t J = cantFail(ST2.getIDForString(R->getKey()));
D.print<EquivalentDiffProvider>(Truncated, I, J);
RS.erase(R);
}
for (const auto &S : RS) {
auto L = LS.find(S.getKey());
std::string Truncated = truncateStringMiddle(S.getKey(), 28);
uint32_t J = cantFail(ST2.getIDForString(S.getKey()));
if (L == LS.end()) {
D.printExplicit(Truncated, DiffResult::DIFFERENT, "(not present)", J);
continue;
}
uint32_t I = cantFail(ST1.getIDForString(L->getKey()));
D.print<EquivalentDiffProvider>(Truncated, I, J);
}
return Error::success();
}
Error DiffStyle::diffFreePageMap() { return Error::success(); }
Error DiffStyle::diffInfoStream() {
DiffPrinter D(2, "PDB Stream", 22, 40, opts::diff::PrintResultColumn,
opts::diff::PrintValueColumns, outs());
D.printExplicit("File", DiffResult::UNSPECIFIED,
truncateStringFront(File1.getFilePath(), 38),
truncateStringFront(File2.getFilePath(), 38));
auto ExpectedInfo1 = File1.getPDBInfoStream();
auto ExpectedInfo2 = File2.getPDBInfoStream();
bool Has1 = !!ExpectedInfo1;
bool Has2 = !!ExpectedInfo2;
if (!(Has1 && Has2)) {
std::string L = Has1 ? "(present)" : "(not present)";
std::string R = Has2 ? "(present)" : "(not present)";
D.print("Stream", L, R);
consumeError(ExpectedInfo1.takeError());
consumeError(ExpectedInfo2.takeError());
return Error::success();
}
auto &IS1 = *ExpectedInfo1;
auto &IS2 = *ExpectedInfo2;
D.print("Stream Size", IS1.getStreamSize(), IS2.getStreamSize());
D.print("Age", IS1.getAge(), IS2.getAge());
D.print("Guid", IS1.getGuid(), IS2.getGuid());
D.print("Signature", IS1.getSignature(), IS2.getSignature());
D.print("Version", IS1.getVersion(), IS2.getVersion());
D.diffUnorderedArray("Feature", IS1.getFeatureSignatures(),
IS2.getFeatureSignatures());
D.print("Named Stream Size", IS1.getNamedStreamMapByteSize(),
IS2.getNamedStreamMapByteSize());
StringMap<uint32_t> NSL = IS1.getNamedStreams().getStringMap();
StringMap<uint32_t> NSR = IS2.getNamedStreams().getStringMap();
D.diffUnorderedMap<EquivalentDiffProvider>("Named Stream", NSL, NSR);
return Error::success();
}
typedef std::pair<uint32_t, DbiModuleDescriptor> IndexedModuleDescriptor;
typedef std::vector<IndexedModuleDescriptor> IndexedModuleDescriptorList;
static IndexedModuleDescriptorList
getModuleDescriptors(const DbiModuleList &ML) {
IndexedModuleDescriptorList List;
List.reserve(ML.getModuleCount());
for (uint32_t I = 0; I < ML.getModuleCount(); ++I)
List.emplace_back(I, ML.getModuleDescriptor(I));
return List;
}
static IndexedModuleDescriptorList::iterator
findOverrideEquivalentModule(uint32_t Modi,
IndexedModuleDescriptorList &OtherList) {
auto &EqMap = opts::diff::Equivalences;
auto Iter = EqMap.find(Modi);
if (Iter == EqMap.end())
return OtherList.end();
uint32_t EqValue = Iter->second;
return llvm::find_if(OtherList,
[EqValue](const IndexedModuleDescriptor &Desc) {
return Desc.first == EqValue;
});
}
static IndexedModuleDescriptorList::iterator
findEquivalentModule(const IndexedModuleDescriptor &Item,
IndexedModuleDescriptorList &OtherList, bool ItemIsRight) {
if (!ItemIsRight) {
uint32_t Modi = Item.first;
auto OverrideIter = findOverrideEquivalentModule(Modi, OtherList);
if (OverrideIter != OtherList.end())
return OverrideIter;
}
BinaryPathProvider PathProvider(28);
auto Iter = OtherList.begin();
auto End = OtherList.end();
for (; Iter != End; ++Iter) {
const IndexedModuleDescriptor *Left = &Item;
const IndexedModuleDescriptor *Right = &*Iter;
if (ItemIsRight)
std::swap(Left, Right);
DiffResult Result = PathProvider.compare(Left->second.getModuleName(),
Right->second.getModuleName());
if (Result == DiffResult::EQUIVALENT || Result == DiffResult::IDENTICAL)
return Iter;
}
return OtherList.end();
}
static void diffOneModule(DiffPrinter &D, const IndexedModuleDescriptor &Item,
IndexedModuleDescriptorList &Other,
bool ItemIsRight) {
StreamPurposeProvider HeaderProvider(70);
std::pair<StreamPurpose, std::string> Header;
Header.first = StreamPurpose::ModuleStream;
Header.second = Item.second.getModuleName();
D.printFullRow(HeaderProvider.format(Header, ItemIsRight));
const auto *L = &Item;
auto Iter = findEquivalentModule(Item, Other, ItemIsRight);
if (Iter == Other.end()) {
// We didn't find this module at all on the other side. Just print one row
// and continue.
if (ItemIsRight)
D.print<ModiProvider>("- Modi", None, Item.first);
else
D.print<ModiProvider>("- Modi", Item.first, None);
return;
}
// We did find this module. Go through and compare each field.
const auto *R = &*Iter;
if (ItemIsRight)
std::swap(L, R);
BinaryPathProvider PathProvider(28);
D.print<ModiProvider>("- Modi", L->first, R->first);
D.print<BinaryPathProvider>("- Obj File Name", L->second.getObjFileName(),
R->second.getObjFileName(), PathProvider);
D.print<StreamNumberProvider>("- Debug Stream",
L->second.getModuleStreamIndex(),
R->second.getModuleStreamIndex());
D.print("- C11 Byte Size", L->second.getC11LineInfoByteSize(),
R->second.getC11LineInfoByteSize());
D.print("- C13 Byte Size", L->second.getC13LineInfoByteSize(),
R->second.getC13LineInfoByteSize());
D.print("- # of files", L->second.getNumberOfFiles(),
R->second.getNumberOfFiles());
D.print("- Pdb File Path Index", L->second.getPdbFilePathNameIndex(),
R->second.getPdbFilePathNameIndex());
D.print("- Source File Name Index", L->second.getSourceFileNameIndex(),
R->second.getSourceFileNameIndex());
D.print("- Symbol Byte Size", L->second.getSymbolDebugInfoByteSize(),
R->second.getSymbolDebugInfoByteSize());
Other.erase(Iter);
}
Error DiffStyle::diffDbiStream() {
DiffPrinter D(2, "DBI Stream", 40, 30, opts::diff::PrintResultColumn,
opts::diff::PrintValueColumns, outs());
D.printExplicit("File", DiffResult::UNSPECIFIED,
truncateStringFront(File1.getFilePath(), 28),
truncateStringFront(File2.getFilePath(), 28));
auto ExpectedDbi1 = File1.getPDBDbiStream();
auto ExpectedDbi2 = File2.getPDBDbiStream();
bool Has1 = !!ExpectedDbi1;
bool Has2 = !!ExpectedDbi2;
if (!(Has1 && Has2)) {
std::string L = Has1 ? "(present)" : "(not present)";
std::string R = Has2 ? "(present)" : "(not present)";
D.print("Stream", L, R);
consumeError(ExpectedDbi1.takeError());
consumeError(ExpectedDbi2.takeError());
return Error::success();
}
auto &DL = *ExpectedDbi1;
auto &DR = *ExpectedDbi2;
D.print("Dbi Version", (uint32_t)DL.getDbiVersion(),
(uint32_t)DR.getDbiVersion());
D.print("Age", DL.getAge(), DR.getAge());
D.print("Machine", (uint16_t)DL.getMachineType(),
(uint16_t)DR.getMachineType());
D.print("Flags", DL.getFlags(), DR.getFlags());
D.print("Build Major", DL.getBuildMajorVersion(), DR.getBuildMajorVersion());
D.print("Build Minor", DL.getBuildMinorVersion(), DR.getBuildMinorVersion());
D.print("Build Number", DL.getBuildNumber(), DR.getBuildNumber());
D.print("PDB DLL Version", DL.getPdbDllVersion(), DR.getPdbDllVersion());
D.print("PDB DLL RBLD", DL.getPdbDllRbld(), DR.getPdbDllRbld());
D.print<StreamNumberProvider>("DBG (FPO)",
DL.getDebugStreamIndex(DbgHeaderType::FPO),
DR.getDebugStreamIndex(DbgHeaderType::FPO));
D.print<StreamNumberProvider>(
"DBG (Exception)", DL.getDebugStreamIndex(DbgHeaderType::Exception),
DR.getDebugStreamIndex(DbgHeaderType::Exception));
D.print<StreamNumberProvider>("DBG (Fixup)",
DL.getDebugStreamIndex(DbgHeaderType::Fixup),
DR.getDebugStreamIndex(DbgHeaderType::Fixup));
D.print<StreamNumberProvider>(
"DBG (OmapToSrc)", DL.getDebugStreamIndex(DbgHeaderType::OmapToSrc),
DR.getDebugStreamIndex(DbgHeaderType::OmapToSrc));
D.print<StreamNumberProvider>(
"DBG (OmapFromSrc)", DL.getDebugStreamIndex(DbgHeaderType::OmapFromSrc),
DR.getDebugStreamIndex(DbgHeaderType::OmapFromSrc));
D.print<StreamNumberProvider>(
"DBG (SectionHdr)", DL.getDebugStreamIndex(DbgHeaderType::SectionHdr),
DR.getDebugStreamIndex(DbgHeaderType::SectionHdr));
D.print<StreamNumberProvider>(
"DBG (TokenRidMap)", DL.getDebugStreamIndex(DbgHeaderType::TokenRidMap),
DR.getDebugStreamIndex(DbgHeaderType::TokenRidMap));
D.print<StreamNumberProvider>("DBG (Xdata)",
DL.getDebugStreamIndex(DbgHeaderType::Xdata),
DR.getDebugStreamIndex(DbgHeaderType::Xdata));
D.print<StreamNumberProvider>("DBG (Pdata)",
DL.getDebugStreamIndex(DbgHeaderType::Pdata),
DR.getDebugStreamIndex(DbgHeaderType::Pdata));
D.print<StreamNumberProvider>("DBG (NewFPO)",
DL.getDebugStreamIndex(DbgHeaderType::NewFPO),
DR.getDebugStreamIndex(DbgHeaderType::NewFPO));
D.print<StreamNumberProvider>(
"DBG (SectionHdrOrig)",
DL.getDebugStreamIndex(DbgHeaderType::SectionHdrOrig),
DR.getDebugStreamIndex(DbgHeaderType::SectionHdrOrig));
D.print<StreamNumberProvider>("Globals Stream",
DL.getGlobalSymbolStreamIndex(),
DR.getGlobalSymbolStreamIndex());
D.print<StreamNumberProvider>("Publics Stream",
DL.getPublicSymbolStreamIndex(),
DR.getPublicSymbolStreamIndex());
D.print<StreamNumberProvider>("Symbol Records", DL.getSymRecordStreamIndex(),
DR.getSymRecordStreamIndex());
D.print("Has CTypes", DL.hasCTypes(), DR.hasCTypes());
D.print("Is Incrementally Linked", DL.isIncrementallyLinked(),
DR.isIncrementallyLinked());
D.print("Is Stripped", DL.isStripped(), DR.isStripped());
const DbiModuleList &ML = DL.modules();
const DbiModuleList &MR = DR.modules();
D.print("Module Count", ML.getModuleCount(), MR.getModuleCount());
D.print("Source File Count", ML.getSourceFileCount(),
MR.getSourceFileCount());
auto MDL = getModuleDescriptors(ML);
auto MDR = getModuleDescriptors(MR);
// Scan all module descriptors from the left, and look for corresponding
// module descriptors on the right.
for (const auto &L : MDL)
diffOneModule(D, L, MDR, false);
for (const auto &R : MDR)
diffOneModule(D, R, MDL, true);
return Error::success();
}
Error DiffStyle::diffSectionContribs() { return Error::success(); }
Error DiffStyle::diffSectionMap() { return Error::success(); }
Error DiffStyle::diffFpoStream() { return Error::success(); }
Error DiffStyle::diffTpiStream(int Index) { return Error::success(); }
Error DiffStyle::diffModuleInfoStream(int Index) { return Error::success(); }
Error DiffStyle::diffPublics() { return Error::success(); }
Error DiffStyle::diffGlobals() { return Error::success(); }
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