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llvm-project/llvm/tools/llvm-readobj/llvm-readobj.cpp
Reid Kleckner 89b57061f7 Move TargetRegistry.(h|cpp) from Support to MC 
This moves the registry higher in the LLVM library dependency stack.
Every client of the target registry needs to link against MC anyway to
actually use the target, so we might as well move this out of Support.

This allows us to ensure that Support doesn't have includes from MC/*.

Differential Revision: https://reviews.llvm.org/D111454
2021-10-08 14:51:48 -07:00

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//===- llvm-readobj.cpp - Dump contents of an Object File -----------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// This is a tool similar to readelf, except it works on multiple object file
// formats. The main purpose of this tool is to provide detailed output suitable
// for FileCheck.
//
// Flags should be similar to readelf where supported, but the output format
// does not need to be identical. The point is to not make users learn yet
// another set of flags.
//
// Output should be specialized for each format where appropriate.
//
//===----------------------------------------------------------------------===//
#include "llvm-readobj.h"
#include "ObjDumper.h"
#include "WindowsResourceDumper.h"
#include "llvm/DebugInfo/CodeView/GlobalTypeTableBuilder.h"
#include "llvm/DebugInfo/CodeView/MergingTypeTableBuilder.h"
#include "llvm/MC/TargetRegistry.h"
#include "llvm/Object/Archive.h"
#include "llvm/Object/COFFImportFile.h"
#include "llvm/Object/ELFObjectFile.h"
#include "llvm/Object/MachOUniversal.h"
#include "llvm/Object/ObjectFile.h"
#include "llvm/Object/Wasm.h"
#include "llvm/Object/WindowsResource.h"
#include "llvm/Object/XCOFFObjectFile.h"
#include "llvm/Option/Arg.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Option/Option.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/DataTypes.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/Errc.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/FormatVariadic.h"
#include "llvm/Support/InitLLVM.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/ScopedPrinter.h"
#include "llvm/Support/WithColor.h"
using namespace llvm;
using namespace llvm::object;
namespace {
using namespace llvm::opt; // for HelpHidden in Opts.inc
enum ID {
OPT_INVALID = 0, // This is not an option ID.
#define OPTION(PREFIX, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM, \
HELPTEXT, METAVAR, VALUES) \
OPT_##ID,
#include "Opts.inc"
#undef OPTION
};
#define PREFIX(NAME, VALUE) const char *const NAME[] = VALUE;
#include "Opts.inc"
#undef PREFIX
static const opt::OptTable::Info InfoTable[] = {
#define OPTION(PREFIX, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM, \
HELPTEXT, METAVAR, VALUES) \
{ \
PREFIX, NAME, HELPTEXT, \
METAVAR, OPT_##ID, opt::Option::KIND##Class, \
PARAM, FLAGS, OPT_##GROUP, \
OPT_##ALIAS, ALIASARGS, VALUES},
#include "Opts.inc"
#undef OPTION
};
class ReadobjOptTable : public opt::OptTable {
public:
ReadobjOptTable() : OptTable(InfoTable) { setGroupedShortOptions(true); }
};
enum OutputFormatTy { bsd, sysv, posix, darwin, just_symbols };
} // namespace
namespace opts {
static bool Addrsig;
static bool All;
static bool ArchSpecificInfo;
static bool BBAddrMap;
bool ExpandRelocs;
static bool CGProfile;
bool Demangle;
static bool DependentLibraries;
static bool DynRelocs;
static bool DynamicSymbols;
static bool FileHeaders;
static bool Headers;
static std::vector<std::string> HexDump;
static bool PrintStackMap;
static bool PrintStackSizes;
static bool Relocations;
bool SectionData;
static bool SectionDetails;
static bool SectionHeaders;
bool SectionRelocations;
bool SectionSymbols;
static std::vector<std::string> StringDump;
static bool StringTable;
static bool Symbols;
static bool UnwindInfo;
static cl::boolOrDefault SectionMapping;
// ELF specific options.
static bool DynamicTable;
static bool ELFLinkerOptions;
static bool GnuHashTable;
static bool HashSymbols;
static bool HashTable;
static bool HashHistogram;
static bool NeededLibraries;
static bool Notes;
static bool ProgramHeaders;
bool RawRelr;
static bool SectionGroups;
static bool VersionInfo;
// Mach-O specific options.
static bool MachODataInCode;
static bool MachODysymtab;
static bool MachOIndirectSymbols;
static bool MachOLinkerOptions;
static bool MachOSegment;
static bool MachOVersionMin;
// PE/COFF specific options.
static bool CodeView;
static bool CodeViewEnableGHash;
static bool CodeViewMergedTypes;
bool CodeViewSubsectionBytes;
static bool COFFBaseRelocs;
static bool COFFDebugDirectory;
static bool COFFDirectives;
static bool COFFExports;
static bool COFFImports;
static bool COFFLoadConfig;
static bool COFFResources;
static bool COFFTLSDirectory;
OutputStyleTy Output = OutputStyleTy::LLVM;
static std::vector<std::string> InputFilenames;
} // namespace opts
static StringRef ToolName;
namespace llvm {
[[noreturn]] static void error(Twine Msg) {
// Flush the standard output to print the error at a
// proper place.
fouts().flush();
WithColor::error(errs(), ToolName) << Msg << "\n";
exit(1);
}
[[noreturn]] void reportError(Error Err, StringRef Input) {
assert(Err);
if (Input == "-")
Input = "<stdin>";
handleAllErrors(createFileError(Input, std::move(Err)),
[&](const ErrorInfoBase &EI) { error(EI.message()); });
llvm_unreachable("error() call should never return");
}
void reportWarning(Error Err, StringRef Input) {
assert(Err);
if (Input == "-")
Input = "<stdin>";
// Flush the standard output to print the warning at a
// proper place.
fouts().flush();
handleAllErrors(
createFileError(Input, std::move(Err)), [&](const ErrorInfoBase &EI) {
WithColor::warning(errs(), ToolName) << EI.message() << "\n";
});
}
} // namespace llvm
static void parseOptions(const opt::InputArgList &Args) {
opts::Addrsig = Args.hasArg(OPT_addrsig);
opts::All = Args.hasArg(OPT_all);
opts::ArchSpecificInfo = Args.hasArg(OPT_arch_specific);
opts::BBAddrMap = Args.hasArg(OPT_bb_addr_map);
opts::CGProfile = Args.hasArg(OPT_cg_profile);
opts::Demangle = Args.hasFlag(OPT_demangle, OPT_no_demangle, false);
opts::DependentLibraries = Args.hasArg(OPT_dependent_libraries);
opts::DynRelocs = Args.hasArg(OPT_dyn_relocations);
opts::DynamicSymbols = Args.hasArg(OPT_dyn_syms);
opts::ExpandRelocs = Args.hasArg(OPT_expand_relocs);
opts::FileHeaders = Args.hasArg(OPT_file_header);
opts::Headers = Args.hasArg(OPT_headers);
opts::HexDump = Args.getAllArgValues(OPT_hex_dump_EQ);
opts::Relocations = Args.hasArg(OPT_relocs);
opts::SectionData = Args.hasArg(OPT_section_data);
opts::SectionDetails = Args.hasArg(OPT_section_details);
opts::SectionHeaders = Args.hasArg(OPT_section_headers);
opts::SectionRelocations = Args.hasArg(OPT_section_relocations);
opts::SectionSymbols = Args.hasArg(OPT_section_symbols);
if (Args.hasArg(OPT_section_mapping))
opts::SectionMapping = cl::BOU_TRUE;
else if (Args.hasArg(OPT_section_mapping_EQ_false))
opts::SectionMapping = cl::BOU_FALSE;
else
opts::SectionMapping = cl::BOU_UNSET;
opts::PrintStackSizes = Args.hasArg(OPT_stack_sizes);
opts::PrintStackMap = Args.hasArg(OPT_stackmap);
opts::StringDump = Args.getAllArgValues(OPT_string_dump_EQ);
opts::StringTable = Args.hasArg(OPT_string_table);
opts::Symbols = Args.hasArg(OPT_symbols);
opts::UnwindInfo = Args.hasArg(OPT_unwind);
// ELF specific options.
opts::DynamicTable = Args.hasArg(OPT_dynamic_table);
opts::ELFLinkerOptions = Args.hasArg(OPT_elf_linker_options);
if (Arg *A = Args.getLastArg(OPT_elf_output_style_EQ)) {
StringRef V(A->getValue());
if (V == "LLVM")
opts::Output = opts::OutputStyleTy::LLVM;
else if (V == "GNU")
opts::Output = opts::OutputStyleTy::GNU;
else
error("--elf-output-style value should be either 'LLVM' or 'GNU'");
}
opts::GnuHashTable = Args.hasArg(OPT_gnu_hash_table);
opts::HashSymbols = Args.hasArg(OPT_hash_symbols);
opts::HashTable = Args.hasArg(OPT_hash_table);
opts::HashHistogram = Args.hasArg(OPT_histogram);
opts::NeededLibraries = Args.hasArg(OPT_needed_libs);
opts::Notes = Args.hasArg(OPT_notes);
opts::ProgramHeaders = Args.hasArg(OPT_program_headers);
opts::RawRelr = Args.hasArg(OPT_raw_relr);
opts::SectionGroups = Args.hasArg(OPT_section_groups);
opts::VersionInfo = Args.hasArg(OPT_version_info);
// Mach-O specific options.
opts::MachODataInCode = Args.hasArg(OPT_macho_data_in_code);
opts::MachODysymtab = Args.hasArg(OPT_macho_dysymtab);
opts::MachOIndirectSymbols = Args.hasArg(OPT_macho_indirect_symbols);
opts::MachOLinkerOptions = Args.hasArg(OPT_macho_linker_options);
opts::MachOSegment = Args.hasArg(OPT_macho_segment);
opts::MachOVersionMin = Args.hasArg(OPT_macho_version_min);
// PE/COFF specific options.
opts::CodeView = Args.hasArg(OPT_codeview);
opts::CodeViewEnableGHash = Args.hasArg(OPT_codeview_ghash);
opts::CodeViewMergedTypes = Args.hasArg(OPT_codeview_merged_types);
opts::CodeViewSubsectionBytes = Args.hasArg(OPT_codeview_subsection_bytes);
opts::COFFBaseRelocs = Args.hasArg(OPT_coff_basereloc);
opts::COFFDebugDirectory = Args.hasArg(OPT_coff_debug_directory);
opts::COFFDirectives = Args.hasArg(OPT_coff_directives);
opts::COFFExports = Args.hasArg(OPT_coff_exports);
opts::COFFImports = Args.hasArg(OPT_coff_imports);
opts::COFFLoadConfig = Args.hasArg(OPT_coff_load_config);
opts::COFFResources = Args.hasArg(OPT_coff_resources);
opts::COFFTLSDirectory = Args.hasArg(OPT_coff_tls_directory);
opts::InputFilenames = Args.getAllArgValues(OPT_INPUT);
}
namespace {
struct ReadObjTypeTableBuilder {
ReadObjTypeTableBuilder()
: Allocator(), IDTable(Allocator), TypeTable(Allocator),
GlobalIDTable(Allocator), GlobalTypeTable(Allocator) {}
llvm::BumpPtrAllocator Allocator;
llvm::codeview::MergingTypeTableBuilder IDTable;
llvm::codeview::MergingTypeTableBuilder TypeTable;
llvm::codeview::GlobalTypeTableBuilder GlobalIDTable;
llvm::codeview::GlobalTypeTableBuilder GlobalTypeTable;
std::vector<OwningBinary<Binary>> Binaries;
};
} // namespace
static ReadObjTypeTableBuilder CVTypes;
/// Creates an format-specific object file dumper.
static Expected<std::unique_ptr<ObjDumper>>
createDumper(const ObjectFile &Obj, ScopedPrinter &Writer) {
if (const COFFObjectFile *COFFObj = dyn_cast<COFFObjectFile>(&Obj))
return createCOFFDumper(*COFFObj, Writer);
if (const ELFObjectFileBase *ELFObj = dyn_cast<ELFObjectFileBase>(&Obj))
return createELFDumper(*ELFObj, Writer);
if (const MachOObjectFile *MachOObj = dyn_cast<MachOObjectFile>(&Obj))
return createMachODumper(*MachOObj, Writer);
if (const WasmObjectFile *WasmObj = dyn_cast<WasmObjectFile>(&Obj))
return createWasmDumper(*WasmObj, Writer);
if (const XCOFFObjectFile *XObj = dyn_cast<XCOFFObjectFile>(&Obj))
return createXCOFFDumper(*XObj, Writer);
return createStringError(errc::invalid_argument,
"unsupported object file format");
}
/// Dumps the specified object file.
static void dumpObject(ObjectFile &Obj, ScopedPrinter &Writer,
const Archive *A = nullptr) {
std::string FileStr =
A ? Twine(A->getFileName() + "(" + Obj.getFileName() + ")").str()
: Obj.getFileName().str();
std::string ContentErrString;
if (Error ContentErr = Obj.initContent())
ContentErrString = "unable to continue dumping, the file is corrupt: " +
toString(std::move(ContentErr));
ObjDumper *Dumper;
Expected<std::unique_ptr<ObjDumper>> DumperOrErr = createDumper(Obj, Writer);
if (!DumperOrErr)
reportError(DumperOrErr.takeError(), FileStr);
Dumper = (*DumperOrErr).get();
if (opts::Output == opts::LLVM || opts::InputFilenames.size() > 1 || A) {
Writer.startLine() << "\n";
Writer.printString("File", FileStr);
}
if (opts::Output == opts::LLVM) {
Writer.printString("Format", Obj.getFileFormatName());
Writer.printString("Arch", Triple::getArchTypeName(Obj.getArch()));
Writer.printString(
"AddressSize",
std::string(formatv("{0}bit", 8 * Obj.getBytesInAddress())));
Dumper->printLoadName();
}
if (opts::FileHeaders)
Dumper->printFileHeaders();
// This is only used for ELF currently. In some cases, when an object is
// corrupt (e.g. truncated), we can't dump anything except the file header.
if (!ContentErrString.empty())
reportError(createError(ContentErrString), FileStr);
if (opts::SectionDetails || opts::SectionHeaders) {
if (opts::Output == opts::GNU && opts::SectionDetails)
Dumper->printSectionDetails();
else
Dumper->printSectionHeaders();
}
if (opts::HashSymbols)
Dumper->printHashSymbols();
if (opts::ProgramHeaders || opts::SectionMapping == cl::BOU_TRUE)
Dumper->printProgramHeaders(opts::ProgramHeaders, opts::SectionMapping);
if (opts::DynamicTable)
Dumper->printDynamicTable();
if (opts::NeededLibraries)
Dumper->printNeededLibraries();
if (opts::Relocations)
Dumper->printRelocations();
if (opts::DynRelocs)
Dumper->printDynamicRelocations();
if (opts::UnwindInfo)
Dumper->printUnwindInfo();
if (opts::Symbols || opts::DynamicSymbols)
Dumper->printSymbols(opts::Symbols, opts::DynamicSymbols);
if (!opts::StringDump.empty())
Dumper->printSectionsAsString(Obj, opts::StringDump);
if (!opts::HexDump.empty())
Dumper->printSectionsAsHex(Obj, opts::HexDump);
if (opts::HashTable)
Dumper->printHashTable();
if (opts::GnuHashTable)
Dumper->printGnuHashTable();
if (opts::VersionInfo)
Dumper->printVersionInfo();
if (opts::StringTable)
Dumper->printStringTable();
if (Obj.isELF()) {
if (opts::DependentLibraries)
Dumper->printDependentLibs();
if (opts::ELFLinkerOptions)
Dumper->printELFLinkerOptions();
if (opts::ArchSpecificInfo)
Dumper->printArchSpecificInfo();
if (opts::SectionGroups)
Dumper->printGroupSections();
if (opts::HashHistogram)
Dumper->printHashHistograms();
if (opts::CGProfile)
Dumper->printCGProfile();
if (opts::BBAddrMap)
Dumper->printBBAddrMaps();
if (opts::Addrsig)
Dumper->printAddrsig();
if (opts::Notes)
Dumper->printNotes();
}
if (Obj.isCOFF()) {
if (opts::COFFImports)
Dumper->printCOFFImports();
if (opts::COFFExports)
Dumper->printCOFFExports();
if (opts::COFFDirectives)
Dumper->printCOFFDirectives();
if (opts::COFFBaseRelocs)
Dumper->printCOFFBaseReloc();
if (opts::COFFDebugDirectory)
Dumper->printCOFFDebugDirectory();
if (opts::COFFTLSDirectory)
Dumper->printCOFFTLSDirectory();
if (opts::COFFResources)
Dumper->printCOFFResources();
if (opts::COFFLoadConfig)
Dumper->printCOFFLoadConfig();
if (opts::CGProfile)
Dumper->printCGProfile();
if (opts::Addrsig)
Dumper->printAddrsig();
if (opts::CodeView)
Dumper->printCodeViewDebugInfo();
if (opts::CodeViewMergedTypes)
Dumper->mergeCodeViewTypes(CVTypes.IDTable, CVTypes.TypeTable,
CVTypes.GlobalIDTable, CVTypes.GlobalTypeTable,
opts::CodeViewEnableGHash);
}
if (Obj.isMachO()) {
if (opts::MachODataInCode)
Dumper->printMachODataInCode();
if (opts::MachOIndirectSymbols)
Dumper->printMachOIndirectSymbols();
if (opts::MachOLinkerOptions)
Dumper->printMachOLinkerOptions();
if (opts::MachOSegment)
Dumper->printMachOSegment();
if (opts::MachOVersionMin)
Dumper->printMachOVersionMin();
if (opts::MachODysymtab)
Dumper->printMachODysymtab();
}
if (opts::PrintStackMap)
Dumper->printStackMap();
if (opts::PrintStackSizes)
Dumper->printStackSizes();
}
/// Dumps each object file in \a Arc;
static void dumpArchive(const Archive *Arc, ScopedPrinter &Writer) {
Error Err = Error::success();
for (auto &Child : Arc->children(Err)) {
Expected<std::unique_ptr<Binary>> ChildOrErr = Child.getAsBinary();
if (!ChildOrErr) {
if (auto E = isNotObjectErrorInvalidFileType(ChildOrErr.takeError()))
reportError(std::move(E), Arc->getFileName());
continue;
}
Binary *Bin = ChildOrErr->get();
if (ObjectFile *Obj = dyn_cast<ObjectFile>(Bin))
dumpObject(*Obj, Writer, Arc);
else if (COFFImportFile *Imp = dyn_cast<COFFImportFile>(Bin))
dumpCOFFImportFile(Imp, Writer);
else
reportWarning(createStringError(errc::invalid_argument,
Bin->getFileName() +
" has an unsupported file type"),
Arc->getFileName());
}
if (Err)
reportError(std::move(Err), Arc->getFileName());
}
/// Dumps each object file in \a MachO Universal Binary;
static void dumpMachOUniversalBinary(const MachOUniversalBinary *UBinary,
ScopedPrinter &Writer) {
for (const MachOUniversalBinary::ObjectForArch &Obj : UBinary->objects()) {
Expected<std::unique_ptr<MachOObjectFile>> ObjOrErr = Obj.getAsObjectFile();
if (ObjOrErr)
dumpObject(*ObjOrErr.get(), Writer);
else if (auto E = isNotObjectErrorInvalidFileType(ObjOrErr.takeError()))
reportError(ObjOrErr.takeError(), UBinary->getFileName());
else if (Expected<std::unique_ptr<Archive>> AOrErr = Obj.getAsArchive())
dumpArchive(&*AOrErr.get(), Writer);
}
}
/// Dumps \a WinRes, Windows Resource (.res) file;
static void dumpWindowsResourceFile(WindowsResource *WinRes,
ScopedPrinter &Printer) {
WindowsRes::Dumper Dumper(WinRes, Printer);
if (auto Err = Dumper.printData())
reportError(std::move(Err), WinRes->getFileName());
}
/// Opens \a File and dumps it.
static void dumpInput(StringRef File, ScopedPrinter &Writer) {
ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
MemoryBuffer::getFileOrSTDIN(File, /*IsText=*/false,
/*RequiresNullTerminator=*/false);
if (std::error_code EC = FileOrErr.getError())
return reportError(errorCodeToError(EC), File);
std::unique_ptr<MemoryBuffer> &Buffer = FileOrErr.get();
file_magic Type = identify_magic(Buffer->getBuffer());
if (Type == file_magic::bitcode) {
reportWarning(createStringError(errc::invalid_argument,
"bitcode files are not supported"),
File);
return;
}
Expected<std::unique_ptr<Binary>> BinaryOrErr = createBinary(
Buffer->getMemBufferRef(), /*Context=*/nullptr, /*InitContent=*/false);
if (!BinaryOrErr)
reportError(BinaryOrErr.takeError(), File);
std::unique_ptr<Binary> Bin = std::move(*BinaryOrErr);
if (Archive *Arc = dyn_cast<Archive>(Bin.get()))
dumpArchive(Arc, Writer);
else if (MachOUniversalBinary *UBinary =
dyn_cast<MachOUniversalBinary>(Bin.get()))
dumpMachOUniversalBinary(UBinary, Writer);
else if (ObjectFile *Obj = dyn_cast<ObjectFile>(Bin.get()))
dumpObject(*Obj, Writer);
else if (COFFImportFile *Import = dyn_cast<COFFImportFile>(Bin.get()))
dumpCOFFImportFile(Import, Writer);
else if (WindowsResource *WinRes = dyn_cast<WindowsResource>(Bin.get()))
dumpWindowsResourceFile(WinRes, Writer);
else
llvm_unreachable("unrecognized file type");
CVTypes.Binaries.push_back(
OwningBinary<Binary>(std::move(Bin), std::move(Buffer)));
}
int main(int argc, char *argv[]) {
InitLLVM X(argc, argv);
BumpPtrAllocator A;
StringSaver Saver(A);
ReadobjOptTable Tbl;
ToolName = argv[0];
opt::InputArgList Args =
Tbl.parseArgs(argc, argv, OPT_UNKNOWN, Saver, [&](StringRef Msg) {
error(Msg);
exit(1);
});
if (Args.hasArg(OPT_help)) {
Tbl.printHelp(
outs(),
(Twine(ToolName) + " [options] <input object files>").str().c_str(),
"LLVM Object Reader");
// TODO Replace this with OptTable API once it adds extrahelp support.
outs() << "\nPass @FILE as argument to read options from FILE.\n";
return 0;
}
if (Args.hasArg(OPT_version)) {
cl::PrintVersionMessage();
return 0;
}
if (sys::path::stem(argv[0]).contains("readelf"))
opts::Output = opts::GNU;
parseOptions(Args);
// Default to print error if no filename is specified.
if (opts::InputFilenames.empty()) {
error("no input files specified");
}
if (opts::All) {
opts::FileHeaders = true;
opts::ProgramHeaders = true;
opts::SectionHeaders = true;
opts::Symbols = true;
opts::Relocations = true;
opts::DynamicTable = true;
opts::Notes = true;
opts::VersionInfo = true;
opts::UnwindInfo = true;
opts::SectionGroups = true;
opts::HashHistogram = true;
if (opts::Output == opts::LLVM) {
opts::Addrsig = true;
opts::PrintStackSizes = true;
}
}
if (opts::Headers) {
opts::FileHeaders = true;
opts::ProgramHeaders = true;
opts::SectionHeaders = true;
}
ScopedPrinter Writer(fouts());
for (const std::string &I : opts::InputFilenames)
dumpInput(I, Writer);
if (opts::CodeViewMergedTypes) {
if (opts::CodeViewEnableGHash)
dumpCodeViewMergedTypes(Writer, CVTypes.GlobalIDTable.records(),
CVTypes.GlobalTypeTable.records());
else
dumpCodeViewMergedTypes(Writer, CVTypes.IDTable.records(),
CVTypes.TypeTable.records());
}
return 0;
}
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