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 PreallocMemory("preallocate",
98 cl::desc("Allocate memory upfront rather than on-demand"),
101 static cl::opt<uint64_t>
102 TargetAddrStart("target-addr-start",
103 cl::desc("For -verify only: start of phony target address "
105 cl::init(4096), // Start at "page 1" - no allocating at "null".
108 static cl::opt<uint64_t>
109 TargetAddrEnd("target-addr-end",
110 cl::desc("For -verify only: end of phony target address range."),
114 static cl::opt<uint64_t>
115 TargetSectionSep("target-section-sep",
116 cl::desc("For -verify only: Separation between sections in "
117 "phony target address space."),
121 static cl::list<std::string>
122 SpecificSectionMappings("map-section",
123 cl::desc("For -verify only: Map a section to a "
124 "specific address."),
128 static cl::list<std::string>
129 DummySymbolMappings("dummy-extern",
130 cl::desc("For -verify only: Inject a symbol into the extern "
137 // A trivial memory manager that doesn't do anything fancy, just uses the
138 // support library allocation routines directly.
139 class TrivialMemoryManager : public RTDyldMemoryManager {
141 SmallVector<sys::MemoryBlock, 16> FunctionMemory;
142 SmallVector<sys::MemoryBlock, 16> DataMemory;
144 uint8_t *allocateCodeSection(uintptr_t Size, unsigned Alignment,
146 StringRef SectionName) override;
147 uint8_t *allocateDataSection(uintptr_t Size, unsigned Alignment,
148 unsigned SectionID, StringRef SectionName,
149 bool IsReadOnly) override;
151 void *getPointerToNamedFunction(const std::string &Name,
152 bool AbortOnFailure = true) override {
156 bool finalizeMemory(std::string *ErrMsg) override { return false; }
158 void addDummySymbol(const std::string &Name, uint64_t Addr) {
159 DummyExterns[Name] = Addr;
162 RuntimeDyld::SymbolInfo findSymbol(const std::string &Name) override {
163 auto I = DummyExterns.find(Name);
165 if (I != DummyExterns.end())
166 return RuntimeDyld::SymbolInfo(I->second, JITSymbolFlags::Exported);
168 return RTDyldMemoryManager::findSymbol(Name);
171 void registerEHFrames(uint8_t *Addr, uint64_t LoadAddr,
172 size_t Size) override {}
173 void deregisterEHFrames(uint8_t *Addr, uint64_t LoadAddr,
174 size_t Size) override {}
176 void preallocateSlab(uint64_t Size) {
178 sys::MemoryBlock MB = sys::Memory::AllocateRWX(Size, nullptr, &Err);
180 report_fatal_error("Can't allocate enough memory: " + Err);
183 UsePreallocation = true;
187 uint8_t *allocateFromSlab(uintptr_t Size, unsigned Alignment, bool isCode) {
188 Size = RoundUpToAlignment(Size, Alignment);
189 if (CurrentSlabOffset + Size > SlabSize)
190 report_fatal_error("Can't allocate enough memory. Tune --preallocate");
192 uintptr_t OldSlabOffset = CurrentSlabOffset;
193 sys::MemoryBlock MB((void *)OldSlabOffset, Size);
195 FunctionMemory.push_back(MB);
197 DataMemory.push_back(MB);
198 CurrentSlabOffset += Size;
199 return (uint8_t*)OldSlabOffset;
203 std::map<std::string, uint64_t> DummyExterns;
204 sys::MemoryBlock PreallocSlab;
205 bool UsePreallocation = false;
206 uintptr_t SlabSize = 0;
207 uintptr_t CurrentSlabOffset = 0;
210 uint8_t *TrivialMemoryManager::allocateCodeSection(uintptr_t Size,
213 StringRef SectionName) {
214 if (UsePreallocation)
215 return allocateFromSlab(Size, Alignment, true /* isCode */);
218 sys::MemoryBlock MB = sys::Memory::AllocateRWX(Size, nullptr, &Err);
220 report_fatal_error("MemoryManager allocation failed: " + Err);
221 FunctionMemory.push_back(MB);
222 return (uint8_t*)MB.base();
225 uint8_t *TrivialMemoryManager::allocateDataSection(uintptr_t Size,
228 StringRef SectionName,
230 if (UsePreallocation)
231 return allocateFromSlab(Size, Alignment, false /* isCode */);
234 sys::MemoryBlock MB = sys::Memory::AllocateRWX(Size, nullptr, &Err);
236 report_fatal_error("MemoryManager allocation failed: " + Err);
237 DataMemory.push_back(MB);
238 return (uint8_t*)MB.base();
241 static const char *ProgramName;
243 static int Error(const Twine &Msg) {
244 errs() << ProgramName << ": error: " << Msg << "\n";
248 static void loadDylibs() {
249 for (const std::string &Dylib : Dylibs) {
250 if (sys::fs::is_regular_file(Dylib)) {
252 if (sys::DynamicLibrary::LoadLibraryPermanently(Dylib.c_str(), &ErrMsg))
253 report_fatal_error("Error loading '" + Dylib + "': " + ErrMsg);
255 report_fatal_error("Dylib not found: '" + Dylib + "'.");
261 static int printLineInfoForInput(bool LoadObjects, bool UseDebugObj) {
262 assert(LoadObjects || !UseDebugObj);
264 // Load any dylibs requested on the command line.
267 // If we don't have any input files, read from stdin.
268 if (!InputFileList.size())
269 InputFileList.push_back("-");
270 for (auto &File : InputFileList) {
271 // Instantiate a dynamic linker.
272 TrivialMemoryManager MemMgr;
273 RuntimeDyld Dyld(MemMgr, MemMgr);
275 // Load the input memory buffer.
277 ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
278 MemoryBuffer::getFileOrSTDIN(File);
279 if (std::error_code EC = InputBuffer.getError())
280 return Error("unable to read input: '" + EC.message() + "'");
282 ErrorOr<std::unique_ptr<ObjectFile>> MaybeObj(
283 ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));
285 if (std::error_code EC = MaybeObj.getError())
286 return Error("unable to create object file: '" + EC.message() + "'");
288 ObjectFile &Obj = **MaybeObj;
290 OwningBinary<ObjectFile> DebugObj;
291 std::unique_ptr<RuntimeDyld::LoadedObjectInfo> LoadedObjInfo = nullptr;
292 ObjectFile *SymbolObj = &Obj;
294 // Load the object file
296 Dyld.loadObject(Obj);
299 return Error(Dyld.getErrorString());
301 // Resolve all the relocations we can.
302 Dyld.resolveRelocations();
305 DebugObj = LoadedObjInfo->getObjectForDebug(Obj);
306 SymbolObj = DebugObj.getBinary();
307 LoadedObjInfo.reset();
311 std::unique_ptr<DIContext> Context(
312 new DWARFContextInMemory(*SymbolObj,LoadedObjInfo.get()));
314 std::vector<std::pair<SymbolRef, uint64_t>> SymAddr =
315 object::computeSymbolSizes(*SymbolObj);
317 // Use symbol info to iterate functions in the object.
318 for (const auto &P : SymAddr) {
319 object::SymbolRef Sym = P.first;
320 if (Sym.getType() == object::SymbolRef::ST_Function) {
321 ErrorOr<StringRef> Name = Sym.getName();
324 ErrorOr<uint64_t> AddrOrErr = Sym.getAddress();
327 uint64_t Addr = *AddrOrErr;
329 uint64_t Size = P.second;
330 // If we're not using the debug object, compute the address of the
331 // symbol in memory (rather than that in the unrelocated object file)
332 // and use that to query the DWARFContext.
333 if (!UseDebugObj && LoadObjects) {
334 object::section_iterator Sec = *Sym.getSection();
336 Sec->getName(SecName);
337 uint64_t SectionLoadAddress =
338 LoadedObjInfo->getSectionLoadAddress(*Sec);
339 if (SectionLoadAddress != 0)
340 Addr += SectionLoadAddress - Sec->getAddress();
343 outs() << "Function: " << *Name << ", Size = " << Size
344 << ", Addr = " << Addr << "\n";
346 DILineInfoTable Lines = Context->getLineInfoForAddressRange(Addr, Size);
347 for (auto &D : Lines) {
348 outs() << " Line info @ " << D.first - Addr << ": "
349 << D.second.FileName << ", line:" << D.second.Line << "\n";
358 static void doPreallocation(TrivialMemoryManager &MemMgr) {
359 // Allocate a slab of memory upfront, if required. This is used if
360 // we want to test small code models.
361 if (static_cast<intptr_t>(PreallocMemory) < 0)
362 report_fatal_error("Pre-allocated bytes of memory must be a positive integer.");
364 // FIXME: Limit the amount of memory that can be preallocated?
365 if (PreallocMemory != 0)
366 MemMgr.preallocateSlab(PreallocMemory);
369 static int executeInput() {
370 // Load any dylibs requested on the command line.
373 // Instantiate a dynamic linker.
374 TrivialMemoryManager MemMgr;
375 doPreallocation(MemMgr);
376 RuntimeDyld Dyld(MemMgr, MemMgr);
378 // FIXME: Preserve buffers until resolveRelocations time to work around a bug
379 // in RuntimeDyldELF.
380 // This fixme should be fixed ASAP. This is a very brittle workaround.
381 std::vector<std::unique_ptr<MemoryBuffer>> InputBuffers;
383 // If we don't have any input files, read from stdin.
384 if (!InputFileList.size())
385 InputFileList.push_back("-");
386 for (auto &File : InputFileList) {
387 // Load the input memory buffer.
388 ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
389 MemoryBuffer::getFileOrSTDIN(File);
390 if (std::error_code EC = InputBuffer.getError())
391 return Error("unable to read input: '" + EC.message() + "'");
392 ErrorOr<std::unique_ptr<ObjectFile>> MaybeObj(
393 ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));
395 if (std::error_code EC = MaybeObj.getError())
396 return Error("unable to create object file: '" + EC.message() + "'");
398 ObjectFile &Obj = **MaybeObj;
399 InputBuffers.push_back(std::move(*InputBuffer));
401 // Load the object file
402 Dyld.loadObject(Obj);
403 if (Dyld.hasError()) {
404 return Error(Dyld.getErrorString());
408 // Resove all the relocations we can.
409 // FIXME: Error out if there are unresolved relocations.
410 Dyld.resolveRelocations();
412 // Get the address of the entry point (_main by default).
413 void *MainAddress = Dyld.getSymbolLocalAddress(EntryPoint);
415 return Error("no definition for '" + EntryPoint + "'");
417 // Invalidate the instruction cache for each loaded function.
418 for (auto &FM : MemMgr.FunctionMemory) {
420 // Make sure the memory is executable.
421 // setExecutable will call InvalidateInstructionCache.
422 std::string ErrorStr;
423 if (!sys::Memory::setExecutable(FM, &ErrorStr))
424 return Error("unable to mark function executable: '" + ErrorStr + "'");
427 // Dispatch to _main().
428 errs() << "loaded '" << EntryPoint << "' at: " << (void*)MainAddress << "\n";
430 int (*Main)(int, const char**) =
431 (int(*)(int,const char**)) uintptr_t(MainAddress);
432 const char **Argv = new const char*[2];
433 // Use the name of the first input object module as argv[0] for the target.
434 Argv[0] = InputFileList[0].c_str();
436 return Main(1, Argv);
439 static int checkAllExpressions(RuntimeDyldChecker &Checker) {
440 for (const auto& CheckerFileName : CheckFiles) {
441 ErrorOr<std::unique_ptr<MemoryBuffer>> CheckerFileBuf =
442 MemoryBuffer::getFileOrSTDIN(CheckerFileName);
443 if (std::error_code EC = CheckerFileBuf.getError())
444 return Error("unable to read input '" + CheckerFileName + "': " +
447 if (!Checker.checkAllRulesInBuffer("# rtdyld-check:",
448 CheckerFileBuf.get().get()))
449 return Error("some checks in '" + CheckerFileName + "' failed");
454 static std::map<void *, uint64_t>
455 applySpecificSectionMappings(RuntimeDyldChecker &Checker) {
457 std::map<void*, uint64_t> SpecificMappings;
459 for (StringRef Mapping : SpecificSectionMappings) {
461 size_t EqualsIdx = Mapping.find_first_of("=");
462 std::string SectionIDStr = Mapping.substr(0, EqualsIdx);
463 size_t ComaIdx = Mapping.find_first_of(",");
465 if (ComaIdx == StringRef::npos)
466 report_fatal_error("Invalid section specification '" + Mapping +
467 "'. Should be '<file name>,<section name>=<addr>'");
469 std::string FileName = SectionIDStr.substr(0, ComaIdx);
470 std::string SectionName = SectionIDStr.substr(ComaIdx + 1);
473 std::string ErrorMsg;
474 std::tie(OldAddrInt, ErrorMsg) =
475 Checker.getSectionAddr(FileName, SectionName, true);
478 report_fatal_error(ErrorMsg);
480 void* OldAddr = reinterpret_cast<void*>(static_cast<uintptr_t>(OldAddrInt));
482 std::string NewAddrStr = Mapping.substr(EqualsIdx + 1);
485 if (StringRef(NewAddrStr).getAsInteger(0, NewAddr))
486 report_fatal_error("Invalid section address in mapping '" + Mapping +
489 Checker.getRTDyld().mapSectionAddress(OldAddr, NewAddr);
490 SpecificMappings[OldAddr] = NewAddr;
493 return SpecificMappings;
496 // Scatter sections in all directions!
497 // Remaps section addresses for -verify mode. The following command line options
498 // can be used to customize the layout of the memory within the phony target's
500 // -target-addr-start <s> -- Specify where the phony target addres range starts.
501 // -target-addr-end <e> -- Specify where the phony target address range ends.
502 // -target-section-sep <d> -- Specify how big a gap should be left between the
503 // end of one section and the start of the next.
504 // Defaults to zero. Set to something big
505 // (e.g. 1 << 32) to stress-test stubs, GOTs, etc.
507 static void remapSectionsAndSymbols(const llvm::Triple &TargetTriple,
508 TrivialMemoryManager &MemMgr,
509 RuntimeDyldChecker &Checker) {
511 // Set up a work list (section addr/size pairs).
512 typedef std::list<std::pair<void*, uint64_t>> WorklistT;
515 for (const auto& CodeSection : MemMgr.FunctionMemory)
516 Worklist.push_back(std::make_pair(CodeSection.base(), CodeSection.size()));
517 for (const auto& DataSection : MemMgr.DataMemory)
518 Worklist.push_back(std::make_pair(DataSection.base(), DataSection.size()));
520 // Apply any section-specific mappings that were requested on the command
522 typedef std::map<void*, uint64_t> AppliedMappingsT;
523 AppliedMappingsT AppliedMappings = applySpecificSectionMappings(Checker);
525 // Keep an "already allocated" mapping of section target addresses to sizes.
526 // Sections whose address mappings aren't specified on the command line will
527 // allocated around the explicitly mapped sections while maintaining the
528 // minimum separation.
529 std::map<uint64_t, uint64_t> AlreadyAllocated;
531 // Move the previously applied mappings into the already-allocated map.
532 for (WorklistT::iterator I = Worklist.begin(), E = Worklist.end();
534 WorklistT::iterator Tmp = I;
536 AppliedMappingsT::iterator AI = AppliedMappings.find(Tmp->first);
538 if (AI != AppliedMappings.end()) {
539 AlreadyAllocated[AI->second] = Tmp->second;
544 // If the -target-addr-end option wasn't explicitly passed, then set it to a
545 // sensible default based on the target triple.
546 if (TargetAddrEnd.getNumOccurrences() == 0) {
547 if (TargetTriple.isArch16Bit())
548 TargetAddrEnd = (1ULL << 16) - 1;
549 else if (TargetTriple.isArch32Bit())
550 TargetAddrEnd = (1ULL << 32) - 1;
551 // TargetAddrEnd already has a sensible default for 64-bit systems, so
552 // there's nothing to do in the 64-bit case.
555 // Process any elements remaining in the worklist.
556 while (!Worklist.empty()) {
557 std::pair<void*, uint64_t> CurEntry = Worklist.front();
558 Worklist.pop_front();
560 uint64_t NextSectionAddr = TargetAddrStart;
562 for (const auto &Alloc : AlreadyAllocated)
563 if (NextSectionAddr + CurEntry.second + TargetSectionSep <= Alloc.first)
566 NextSectionAddr = Alloc.first + Alloc.second + TargetSectionSep;
568 AlreadyAllocated[NextSectionAddr] = CurEntry.second;
569 Checker.getRTDyld().mapSectionAddress(CurEntry.first, NextSectionAddr);
572 // Add dummy symbols to the memory manager.
573 for (const auto &Mapping : DummySymbolMappings) {
574 size_t EqualsIdx = Mapping.find_first_of("=");
576 if (EqualsIdx == StringRef::npos)
577 report_fatal_error("Invalid dummy symbol specification '" + Mapping +
578 "'. Should be '<symbol name>=<addr>'");
580 std::string Symbol = Mapping.substr(0, EqualsIdx);
581 std::string AddrStr = Mapping.substr(EqualsIdx + 1);
584 if (StringRef(AddrStr).getAsInteger(0, Addr))
585 report_fatal_error("Invalid symbol mapping '" + Mapping + "'.");
587 MemMgr.addDummySymbol(Symbol, Addr);
591 // Load and link the objects specified on the command line, but do not execute
592 // anything. Instead, attach a RuntimeDyldChecker instance and call it to
593 // verify the correctness of the linked memory.
594 static int linkAndVerify() {
596 // Check for missing triple.
597 if (TripleName == "")
598 return Error("-triple required when running in -verify mode.");
600 // Look up the target and build the disassembler.
601 Triple TheTriple(Triple::normalize(TripleName));
602 std::string ErrorStr;
603 const Target *TheTarget =
604 TargetRegistry::lookupTarget("", TheTriple, ErrorStr);
606 return Error("Error accessing target '" + TripleName + "': " + ErrorStr);
608 TripleName = TheTriple.getTriple();
610 std::unique_ptr<MCSubtargetInfo> STI(
611 TheTarget->createMCSubtargetInfo(TripleName, MCPU, ""));
613 return Error("Unable to create subtarget info!");
615 std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
617 return Error("Unable to create target register info!");
619 std::unique_ptr<MCAsmInfo> MAI(TheTarget->createMCAsmInfo(*MRI, TripleName));
621 return Error("Unable to create target asm info!");
623 MCContext Ctx(MAI.get(), MRI.get(), nullptr);
625 std::unique_ptr<MCDisassembler> Disassembler(
626 TheTarget->createMCDisassembler(*STI, Ctx));
628 return Error("Unable to create disassembler!");
630 std::unique_ptr<MCInstrInfo> MII(TheTarget->createMCInstrInfo());
632 std::unique_ptr<MCInstPrinter> InstPrinter(
633 TheTarget->createMCInstPrinter(Triple(TripleName), 0, *MAI, *MII, *MRI));
635 // Load any dylibs requested on the command line.
638 // Instantiate a dynamic linker.
639 TrivialMemoryManager MemMgr;
640 doPreallocation(MemMgr);
641 RuntimeDyld Dyld(MemMgr, MemMgr);
642 Dyld.setProcessAllSections(true);
643 RuntimeDyldChecker Checker(Dyld, Disassembler.get(), InstPrinter.get(),
646 // FIXME: Preserve buffers until resolveRelocations time to work around a bug
647 // in RuntimeDyldELF.
648 // This fixme should be fixed ASAP. This is a very brittle workaround.
649 std::vector<std::unique_ptr<MemoryBuffer>> InputBuffers;
651 // If we don't have any input files, read from stdin.
652 if (!InputFileList.size())
653 InputFileList.push_back("-");
654 for (auto &Filename : InputFileList) {
655 // Load the input memory buffer.
656 ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
657 MemoryBuffer::getFileOrSTDIN(Filename);
659 if (std::error_code EC = InputBuffer.getError())
660 return Error("unable to read input: '" + EC.message() + "'");
662 ErrorOr<std::unique_ptr<ObjectFile>> MaybeObj(
663 ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));
665 if (std::error_code EC = MaybeObj.getError())
666 return Error("unable to create object file: '" + EC.message() + "'");
668 ObjectFile &Obj = **MaybeObj;
669 InputBuffers.push_back(std::move(*InputBuffer));
671 // Load the object file
672 Dyld.loadObject(Obj);
673 if (Dyld.hasError()) {
674 return Error(Dyld.getErrorString());
678 // Re-map the section addresses into the phony target address space and add
680 remapSectionsAndSymbols(TheTriple, MemMgr, Checker);
682 // Resolve all the relocations we can.
683 Dyld.resolveRelocations();
685 // Register EH frames.
686 Dyld.registerEHFrames();
688 int ErrorCode = checkAllExpressions(Checker);
690 return Error("RTDyld reported an error applying relocations:\n " +
691 Dyld.getErrorString());
696 int main(int argc, char **argv) {
697 sys::PrintStackTraceOnErrorSignal();
698 PrettyStackTraceProgram X(argc, argv);
700 ProgramName = argv[0];
701 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
703 llvm::InitializeAllTargetInfos();
704 llvm::InitializeAllTargetMCs();
705 llvm::InitializeAllDisassemblers();
707 cl::ParseCommandLineOptions(argc, argv, "llvm MC-JIT tool\n");
711 return executeInput();
712 case AC_PrintDebugLineInfo:
713 return printLineInfoForInput(/* LoadObjects */ true,/* UseDebugObj */ true);
714 case AC_PrintLineInfo:
715 return printLineInfoForInput(/* LoadObjects */ true,/* UseDebugObj */false);
716 case AC_PrintObjectLineInfo:
717 return printLineInfoForInput(/* LoadObjects */false,/* UseDebugObj */false);
719 return linkAndVerify();