1 //===-- llvm-rtdyld.cpp - MCJIT Testing Tool ------------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This is a testing tool for use with the MC-JIT LLVM components.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/ADT/StringMap.h"
15 #include "llvm/DebugInfo/DIContext.h"
16 #include "llvm/DebugInfo/DWARF/DWARFContext.h"
17 #include "llvm/ExecutionEngine/RTDyldMemoryManager.h"
18 #include "llvm/ExecutionEngine/RuntimeDyld.h"
19 #include "llvm/ExecutionEngine/RuntimeDyldChecker.h"
20 #include "llvm/MC/MCAsmInfo.h"
21 #include "llvm/MC/MCContext.h"
22 #include "llvm/MC/MCDisassembler.h"
23 #include "llvm/MC/MCInstPrinter.h"
24 #include "llvm/MC/MCInstrInfo.h"
25 #include "llvm/MC/MCRegisterInfo.h"
26 #include "llvm/MC/MCSubtargetInfo.h"
27 #include "llvm/Object/MachO.h"
28 #include "llvm/Object/SymbolSize.h"
29 #include "llvm/Support/CommandLine.h"
30 #include "llvm/Support/DynamicLibrary.h"
31 #include "llvm/Support/ManagedStatic.h"
32 #include "llvm/Support/Memory.h"
33 #include "llvm/Support/MemoryBuffer.h"
34 #include "llvm/Support/PrettyStackTrace.h"
35 #include "llvm/Support/Signals.h"
36 #include "llvm/Support/TargetRegistry.h"
37 #include "llvm/Support/TargetSelect.h"
38 #include "llvm/Support/raw_ostream.h"
40 #include <system_error>
43 using namespace llvm::object;
45 static cl::list<std::string>
46 InputFileList(cl::Positional, cl::ZeroOrMore,
47 cl::desc("<input file>"));
51 AC_PrintObjectLineInfo,
53 AC_PrintDebugLineInfo,
57 static cl::opt<ActionType>
58 Action(cl::desc("Action to perform:"),
60 cl::values(clEnumValN(AC_Execute, "execute",
61 "Load, link, and execute the inputs."),
62 clEnumValN(AC_PrintLineInfo, "printline",
63 "Load, link, and print line information for each function."),
64 clEnumValN(AC_PrintDebugLineInfo, "printdebugline",
65 "Load, link, and print line information for each function using the debug object"),
66 clEnumValN(AC_PrintObjectLineInfo, "printobjline",
67 "Like -printlineinfo but does not load the object first"),
68 clEnumValN(AC_Verify, "verify",
69 "Load, link and verify the resulting memory image."),
72 static cl::opt<std::string>
74 cl::desc("Function to call as entry point."),
77 static cl::list<std::string>
79 cl::desc("Add library."),
82 static cl::opt<std::string>
83 TripleName("triple", cl::desc("Target triple for disassembler"));
85 static cl::opt<std::string>
87 cl::desc("Target a specific cpu type (-mcpu=help for details)"),
88 cl::value_desc("cpu-name"),
91 static cl::list<std::string>
93 cl::desc("File containing RuntimeDyld verifier checks."),
96 static cl::opt<uint64_t>
97 TargetAddrStart("target-addr-start",
98 cl::desc("For -verify only: start of phony target address "
100 cl::init(4096), // Start at "page 1" - no allocating at "null".
103 static cl::opt<uint64_t>
104 TargetAddrEnd("target-addr-end",
105 cl::desc("For -verify only: end of phony target address range."),
109 static cl::opt<uint64_t>
110 TargetSectionSep("target-section-sep",
111 cl::desc("For -verify only: Separation between sections in "
112 "phony target address space."),
116 static cl::list<std::string>
117 SpecificSectionMappings("map-section",
118 cl::desc("For -verify only: Map a section to a "
119 "specific address."),
123 static cl::list<std::string>
124 DummySymbolMappings("dummy-extern",
125 cl::desc("For -verify only: Inject a symbol into the extern "
132 // A trivial memory manager that doesn't do anything fancy, just uses the
133 // support library allocation routines directly.
134 class TrivialMemoryManager : public RTDyldMemoryManager {
136 SmallVector<sys::MemoryBlock, 16> FunctionMemory;
137 SmallVector<sys::MemoryBlock, 16> DataMemory;
139 uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
141 StringRef SectionName) override;
142 uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
143 unsigned SectionID, StringRef SectionName,
144 bool IsReadOnly) override;
146 void *getPointerToNamedFunction(const std::string &Name,
147 bool AbortOnFailure = true) override {
151 bool finalizeMemory(std::string *ErrMsg) override { return false; }
153 // Invalidate instruction cache for sections with execute permissions.
154 // Some platforms with separate data cache and instruction cache require
155 // explicit cache flush, otherwise JIT code manipulations (like resolved
156 // relocations) will get to the data cache but not to the instruction cache.
157 virtual void invalidateInstructionCache();
159 void addDummySymbol(const std::string &Name, uint64_t Addr) {
160 DummyExterns[Name] = Addr;
163 RuntimeDyld::SymbolInfo findSymbol(const std::string &Name) override {
164 auto I = DummyExterns.find(Name);
166 if (I != DummyExterns.end())
167 return RuntimeDyld::SymbolInfo(I->second, JITSymbolFlags::Exported);
169 return RTDyldMemoryManager::findSymbol(Name);
172 void registerEHFrames(uint8_t *Addr, uint64_t LoadAddr,
173 size_t Size) override {}
174 void deregisterEHFrames(uint8_t *Addr, uint64_t LoadAddr,
175 size_t Size) override {}
177 std::map<std::string, uint64_t> DummyExterns;
180 uint8_t *TrivialMemoryManager::allocateCodeSection(uintptr_t Size,
183 StringRef SectionName) {
184 sys::MemoryBlock MB = sys::Memory::AllocateRWX(Size, nullptr, nullptr);
185 FunctionMemory.push_back(MB);
186 return (uint8_t*)MB.base();
189 uint8_t *TrivialMemoryManager::allocateDataSection(uintptr_t Size,
192 StringRef SectionName,
194 sys::MemoryBlock MB = sys::Memory::AllocateRWX(Size, nullptr, nullptr);
195 DataMemory.push_back(MB);
196 return (uint8_t*)MB.base();
199 void TrivialMemoryManager::invalidateInstructionCache() {
200 for (int i = 0, e = FunctionMemory.size(); i != e; ++i)
201 sys::Memory::InvalidateInstructionCache(FunctionMemory[i].base(),
202 FunctionMemory[i].size());
204 for (int i = 0, e = DataMemory.size(); i != e; ++i)
205 sys::Memory::InvalidateInstructionCache(DataMemory[i].base(),
206 DataMemory[i].size());
209 static const char *ProgramName;
211 static void Message(const char *Type, const Twine &Msg) {
212 errs() << ProgramName << ": " << Type << ": " << Msg << "\n";
215 static int Error(const Twine &Msg) {
216 Message("error", Msg);
220 static void loadDylibs() {
221 for (const std::string &Dylib : Dylibs) {
222 if (sys::fs::is_regular_file(Dylib)) {
224 if (sys::DynamicLibrary::LoadLibraryPermanently(Dylib.c_str(), &ErrMsg))
225 llvm::errs() << "Error loading '" << Dylib << "': "
228 llvm::errs() << "Dylib not found: '" << Dylib << "'.\n";
234 static int printLineInfoForInput(bool LoadObjects, bool UseDebugObj) {
235 assert(LoadObjects || !UseDebugObj);
237 // Load any dylibs requested on the command line.
240 // If we don't have any input files, read from stdin.
241 if (!InputFileList.size())
242 InputFileList.push_back("-");
243 for(unsigned i = 0, e = InputFileList.size(); i != e; ++i) {
244 // Instantiate a dynamic linker.
245 TrivialMemoryManager MemMgr;
246 RuntimeDyld Dyld(MemMgr, MemMgr);
248 // Load the input memory buffer.
250 ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
251 MemoryBuffer::getFileOrSTDIN(InputFileList[i]);
252 if (std::error_code EC = InputBuffer.getError())
253 return Error("unable to read input: '" + EC.message() + "'");
255 ErrorOr<std::unique_ptr<ObjectFile>> MaybeObj(
256 ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));
258 if (std::error_code EC = MaybeObj.getError())
259 return Error("unable to create object file: '" + EC.message() + "'");
261 ObjectFile &Obj = **MaybeObj;
263 OwningBinary<ObjectFile> DebugObj;
264 std::unique_ptr<RuntimeDyld::LoadedObjectInfo> LoadedObjInfo = nullptr;
265 ObjectFile *SymbolObj = &Obj;
267 // Load the object file
269 Dyld.loadObject(Obj);
272 return Error(Dyld.getErrorString());
274 // Resolve all the relocations we can.
275 Dyld.resolveRelocations();
278 DebugObj = LoadedObjInfo->getObjectForDebug(Obj);
279 SymbolObj = DebugObj.getBinary();
280 LoadedObjInfo.reset();
284 std::unique_ptr<DIContext> Context(
285 new DWARFContextInMemory(*SymbolObj,LoadedObjInfo.get()));
287 std::vector<std::pair<SymbolRef, uint64_t>> SymAddr =
288 object::computeSymbolSizes(*SymbolObj);
290 // Use symbol info to iterate functions in the object.
291 for (const auto &P : SymAddr) {
292 object::SymbolRef Sym = P.first;
293 if (Sym.getType() == object::SymbolRef::ST_Function) {
294 ErrorOr<StringRef> Name = Sym.getName();
297 ErrorOr<uint64_t> AddrOrErr = Sym.getAddress();
300 uint64_t Addr = *AddrOrErr;
302 uint64_t Size = P.second;
303 // If we're not using the debug object, compute the address of the
304 // symbol in memory (rather than that in the unrelocated object file)
305 // and use that to query the DWARFContext.
306 if (!UseDebugObj && LoadObjects) {
307 object::section_iterator Sec(SymbolObj->section_end());
310 Sec->getName(SecName);
311 uint64_t SectionLoadAddress =
312 LoadedObjInfo->getSectionLoadAddress(*Sec);
313 if (SectionLoadAddress != 0)
314 Addr += SectionLoadAddress - Sec->getAddress();
317 outs() << "Function: " << *Name << ", Size = " << Size
318 << ", Addr = " << Addr << "\n";
320 DILineInfoTable Lines = Context->getLineInfoForAddressRange(Addr, Size);
321 DILineInfoTable::iterator Begin = Lines.begin();
322 DILineInfoTable::iterator End = Lines.end();
323 for (DILineInfoTable::iterator It = Begin; It != End; ++It) {
324 outs() << " Line info @ " << It->first - Addr << ": "
325 << It->second.FileName << ", line:" << It->second.Line << "\n";
334 static int executeInput() {
335 // Load any dylibs requested on the command line.
338 // Instantiate a dynamic linker.
339 TrivialMemoryManager MemMgr;
340 RuntimeDyld Dyld(MemMgr, MemMgr);
342 // FIXME: Preserve buffers until resolveRelocations time to work around a bug
343 // in RuntimeDyldELF.
344 // This fixme should be fixed ASAP. This is a very brittle workaround.
345 std::vector<std::unique_ptr<MemoryBuffer>> InputBuffers;
347 // If we don't have any input files, read from stdin.
348 if (!InputFileList.size())
349 InputFileList.push_back("-");
350 for(unsigned i = 0, e = InputFileList.size(); i != e; ++i) {
351 // Load the input memory buffer.
352 ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
353 MemoryBuffer::getFileOrSTDIN(InputFileList[i]);
354 if (std::error_code EC = InputBuffer.getError())
355 return Error("unable to read input: '" + EC.message() + "'");
356 ErrorOr<std::unique_ptr<ObjectFile>> MaybeObj(
357 ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));
359 if (std::error_code EC = MaybeObj.getError())
360 return Error("unable to create object file: '" + EC.message() + "'");
362 ObjectFile &Obj = **MaybeObj;
363 InputBuffers.push_back(std::move(*InputBuffer));
365 // Load the object file
366 Dyld.loadObject(Obj);
367 if (Dyld.hasError()) {
368 return Error(Dyld.getErrorString());
372 // Resolve all the relocations we can.
373 Dyld.resolveRelocations();
374 // Clear instruction cache before code will be executed.
375 MemMgr.invalidateInstructionCache();
377 // FIXME: Error out if there are unresolved relocations.
379 // Get the address of the entry point (_main by default).
380 void *MainAddress = Dyld.getSymbolLocalAddress(EntryPoint);
382 return Error("no definition for '" + EntryPoint + "'");
384 // Invalidate the instruction cache for each loaded function.
385 for (unsigned i = 0, e = MemMgr.FunctionMemory.size(); i != e; ++i) {
386 sys::MemoryBlock &Data = MemMgr.FunctionMemory[i];
387 // Make sure the memory is executable.
388 std::string ErrorStr;
389 sys::Memory::InvalidateInstructionCache(Data.base(), Data.size());
390 if (!sys::Memory::setExecutable(Data, &ErrorStr))
391 return Error("unable to mark function executable: '" + ErrorStr + "'");
394 // Dispatch to _main().
395 errs() << "loaded '" << EntryPoint << "' at: " << (void*)MainAddress << "\n";
397 int (*Main)(int, const char**) =
398 (int(*)(int,const char**)) uintptr_t(MainAddress);
399 const char **Argv = new const char*[2];
400 // Use the name of the first input object module as argv[0] for the target.
401 Argv[0] = InputFileList[0].c_str();
403 return Main(1, Argv);
406 static int checkAllExpressions(RuntimeDyldChecker &Checker) {
407 for (const auto& CheckerFileName : CheckFiles) {
408 ErrorOr<std::unique_ptr<MemoryBuffer>> CheckerFileBuf =
409 MemoryBuffer::getFileOrSTDIN(CheckerFileName);
410 if (std::error_code EC = CheckerFileBuf.getError())
411 return Error("unable to read input '" + CheckerFileName + "': " +
414 if (!Checker.checkAllRulesInBuffer("# rtdyld-check:",
415 CheckerFileBuf.get().get()))
416 return Error("some checks in '" + CheckerFileName + "' failed");
421 static std::map<void *, uint64_t>
422 applySpecificSectionMappings(RuntimeDyldChecker &Checker) {
424 std::map<void*, uint64_t> SpecificMappings;
426 for (StringRef Mapping : SpecificSectionMappings) {
428 size_t EqualsIdx = Mapping.find_first_of("=");
429 std::string SectionIDStr = Mapping.substr(0, EqualsIdx);
430 size_t ComaIdx = Mapping.find_first_of(",");
432 if (ComaIdx == StringRef::npos) {
433 errs() << "Invalid section specification '" << Mapping
434 << "'. Should be '<file name>,<section name>=<addr>'\n";
438 std::string FileName = SectionIDStr.substr(0, ComaIdx);
439 std::string SectionName = SectionIDStr.substr(ComaIdx + 1);
442 std::string ErrorMsg;
443 std::tie(OldAddrInt, ErrorMsg) =
444 Checker.getSectionAddr(FileName, SectionName, true);
446 if (ErrorMsg != "") {
451 void* OldAddr = reinterpret_cast<void*>(static_cast<uintptr_t>(OldAddrInt));
453 std::string NewAddrStr = Mapping.substr(EqualsIdx + 1);
456 if (StringRef(NewAddrStr).getAsInteger(0, NewAddr)) {
457 errs() << "Invalid section address in mapping '" << Mapping << "'.\n";
461 Checker.getRTDyld().mapSectionAddress(OldAddr, NewAddr);
462 SpecificMappings[OldAddr] = NewAddr;
465 return SpecificMappings;
468 // Scatter sections in all directions!
469 // Remaps section addresses for -verify mode. The following command line options
470 // can be used to customize the layout of the memory within the phony target's
472 // -target-addr-start <s> -- Specify where the phony target addres range starts.
473 // -target-addr-end <e> -- Specify where the phony target address range ends.
474 // -target-section-sep <d> -- Specify how big a gap should be left between the
475 // end of one section and the start of the next.
476 // Defaults to zero. Set to something big
477 // (e.g. 1 << 32) to stress-test stubs, GOTs, etc.
479 static void remapSectionsAndSymbols(const llvm::Triple &TargetTriple,
480 TrivialMemoryManager &MemMgr,
481 RuntimeDyldChecker &Checker) {
483 // Set up a work list (section addr/size pairs).
484 typedef std::list<std::pair<void*, uint64_t>> WorklistT;
487 for (const auto& CodeSection : MemMgr.FunctionMemory)
488 Worklist.push_back(std::make_pair(CodeSection.base(), CodeSection.size()));
489 for (const auto& DataSection : MemMgr.DataMemory)
490 Worklist.push_back(std::make_pair(DataSection.base(), DataSection.size()));
492 // Apply any section-specific mappings that were requested on the command
494 typedef std::map<void*, uint64_t> AppliedMappingsT;
495 AppliedMappingsT AppliedMappings = applySpecificSectionMappings(Checker);
497 // Keep an "already allocated" mapping of section target addresses to sizes.
498 // Sections whose address mappings aren't specified on the command line will
499 // allocated around the explicitly mapped sections while maintaining the
500 // minimum separation.
501 std::map<uint64_t, uint64_t> AlreadyAllocated;
503 // Move the previously applied mappings into the already-allocated map.
504 for (WorklistT::iterator I = Worklist.begin(), E = Worklist.end();
506 WorklistT::iterator Tmp = I;
508 AppliedMappingsT::iterator AI = AppliedMappings.find(Tmp->first);
510 if (AI != AppliedMappings.end()) {
511 AlreadyAllocated[AI->second] = Tmp->second;
516 // If the -target-addr-end option wasn't explicitly passed, then set it to a
517 // sensible default based on the target triple.
518 if (TargetAddrEnd.getNumOccurrences() == 0) {
519 if (TargetTriple.isArch16Bit())
520 TargetAddrEnd = (1ULL << 16) - 1;
521 else if (TargetTriple.isArch32Bit())
522 TargetAddrEnd = (1ULL << 32) - 1;
523 // TargetAddrEnd already has a sensible default for 64-bit systems, so
524 // there's nothing to do in the 64-bit case.
527 // Process any elements remaining in the worklist.
528 while (!Worklist.empty()) {
529 std::pair<void*, uint64_t> CurEntry = Worklist.front();
530 Worklist.pop_front();
532 uint64_t NextSectionAddr = TargetAddrStart;
534 for (const auto &Alloc : AlreadyAllocated)
535 if (NextSectionAddr + CurEntry.second + TargetSectionSep <= Alloc.first)
538 NextSectionAddr = Alloc.first + Alloc.second + TargetSectionSep;
540 AlreadyAllocated[NextSectionAddr] = CurEntry.second;
541 Checker.getRTDyld().mapSectionAddress(CurEntry.first, NextSectionAddr);
544 // Add dummy symbols to the memory manager.
545 for (const auto &Mapping : DummySymbolMappings) {
546 size_t EqualsIdx = Mapping.find_first_of("=");
548 if (EqualsIdx == StringRef::npos) {
549 errs() << "Invalid dummy symbol specification '" << Mapping
550 << "'. Should be '<symbol name>=<addr>'\n";
554 std::string Symbol = Mapping.substr(0, EqualsIdx);
555 std::string AddrStr = Mapping.substr(EqualsIdx + 1);
558 if (StringRef(AddrStr).getAsInteger(0, Addr)) {
559 errs() << "Invalid symbol mapping '" << Mapping << "'.\n";
563 MemMgr.addDummySymbol(Symbol, Addr);
567 // Load and link the objects specified on the command line, but do not execute
568 // anything. Instead, attach a RuntimeDyldChecker instance and call it to
569 // verify the correctness of the linked memory.
570 static int linkAndVerify() {
572 // Check for missing triple.
573 if (TripleName == "") {
574 llvm::errs() << "Error: -triple required when running in -verify mode.\n";
578 // Look up the target and build the disassembler.
579 Triple TheTriple(Triple::normalize(TripleName));
580 std::string ErrorStr;
581 const Target *TheTarget =
582 TargetRegistry::lookupTarget("", TheTriple, ErrorStr);
584 llvm::errs() << "Error accessing target '" << TripleName << "': "
588 TripleName = TheTriple.getTriple();
590 std::unique_ptr<MCSubtargetInfo> STI(
591 TheTarget->createMCSubtargetInfo(TripleName, MCPU, ""));
592 assert(STI && "Unable to create subtarget info!");
594 std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
595 assert(MRI && "Unable to create target register info!");
597 std::unique_ptr<MCAsmInfo> MAI(TheTarget->createMCAsmInfo(*MRI, TripleName));
598 assert(MAI && "Unable to create target asm info!");
600 MCContext Ctx(MAI.get(), MRI.get(), nullptr);
602 std::unique_ptr<MCDisassembler> Disassembler(
603 TheTarget->createMCDisassembler(*STI, Ctx));
604 assert(Disassembler && "Unable to create disassembler!");
606 std::unique_ptr<MCInstrInfo> MII(TheTarget->createMCInstrInfo());
608 std::unique_ptr<MCInstPrinter> InstPrinter(
609 TheTarget->createMCInstPrinter(Triple(TripleName), 0, *MAI, *MII, *MRI));
611 // Load any dylibs requested on the command line.
614 // Instantiate a dynamic linker.
615 TrivialMemoryManager MemMgr;
616 RuntimeDyld Dyld(MemMgr, MemMgr);
617 Dyld.setProcessAllSections(true);
618 RuntimeDyldChecker Checker(Dyld, Disassembler.get(), InstPrinter.get(),
621 // FIXME: Preserve buffers until resolveRelocations time to work around a bug
622 // in RuntimeDyldELF.
623 // This fixme should be fixed ASAP. This is a very brittle workaround.
624 std::vector<std::unique_ptr<MemoryBuffer>> InputBuffers;
626 // If we don't have any input files, read from stdin.
627 if (!InputFileList.size())
628 InputFileList.push_back("-");
629 for(unsigned i = 0, e = InputFileList.size(); i != e; ++i) {
630 // Load the input memory buffer.
631 ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
632 MemoryBuffer::getFileOrSTDIN(InputFileList[i]);
634 if (std::error_code EC = InputBuffer.getError())
635 return Error("unable to read input: '" + EC.message() + "'");
637 ErrorOr<std::unique_ptr<ObjectFile>> MaybeObj(
638 ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));
640 if (std::error_code EC = MaybeObj.getError())
641 return Error("unable to create object file: '" + EC.message() + "'");
643 ObjectFile &Obj = **MaybeObj;
644 InputBuffers.push_back(std::move(*InputBuffer));
646 // Load the object file
647 Dyld.loadObject(Obj);
648 if (Dyld.hasError()) {
649 return Error(Dyld.getErrorString());
653 // Re-map the section addresses into the phony target address space and add
655 remapSectionsAndSymbols(TheTriple, MemMgr, Checker);
657 // Resolve all the relocations we can.
658 Dyld.resolveRelocations();
660 // Register EH frames.
661 Dyld.registerEHFrames();
663 int ErrorCode = checkAllExpressions(Checker);
664 if (Dyld.hasError()) {
665 errs() << "RTDyld reported an error applying relocations:\n "
666 << Dyld.getErrorString() << "\n";
673 int main(int argc, char **argv) {
674 sys::PrintStackTraceOnErrorSignal();
675 PrettyStackTraceProgram X(argc, argv);
677 ProgramName = argv[0];
678 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
680 llvm::InitializeAllTargetInfos();
681 llvm::InitializeAllTargetMCs();
682 llvm::InitializeAllDisassemblers();
684 cl::ParseCommandLineOptions(argc, argv, "llvm MC-JIT tool\n");
688 return executeInput();
689 case AC_PrintDebugLineInfo:
690 return printLineInfoForInput(/* LoadObjects */ true,/* UseDebugObj */ true);
691 case AC_PrintLineInfo:
692 return printLineInfoForInput(/* LoadObjects */ true,/* UseDebugObj */false);
693 case AC_PrintObjectLineInfo:
694 return printLineInfoForInput(/* LoadObjects */false,/* UseDebugObj */false);
696 return linkAndVerify();