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 llvm::errs() << "Error loading '" << Dylib << "': "
256 llvm::errs() << "Dylib not found: '" << Dylib << "'.\n";
262 static int printLineInfoForInput(bool LoadObjects, bool UseDebugObj) {
263 assert(LoadObjects || !UseDebugObj);
265 // Load any dylibs requested on the command line.
268 // If we don't have any input files, read from stdin.
269 if (!InputFileList.size())
270 InputFileList.push_back("-");
271 for (auto &File : InputFileList) {
272 // Instantiate a dynamic linker.
273 TrivialMemoryManager MemMgr;
274 RuntimeDyld Dyld(MemMgr, MemMgr);
276 // Load the input memory buffer.
278 ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
279 MemoryBuffer::getFileOrSTDIN(File);
280 if (std::error_code EC = InputBuffer.getError())
281 return Error("unable to read input: '" + EC.message() + "'");
283 ErrorOr<std::unique_ptr<ObjectFile>> MaybeObj(
284 ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));
286 if (std::error_code EC = MaybeObj.getError())
287 return Error("unable to create object file: '" + EC.message() + "'");
289 ObjectFile &Obj = **MaybeObj;
291 OwningBinary<ObjectFile> DebugObj;
292 std::unique_ptr<RuntimeDyld::LoadedObjectInfo> LoadedObjInfo = nullptr;
293 ObjectFile *SymbolObj = &Obj;
295 // Load the object file
297 Dyld.loadObject(Obj);
300 return Error(Dyld.getErrorString());
302 // Resolve all the relocations we can.
303 Dyld.resolveRelocations();
306 DebugObj = LoadedObjInfo->getObjectForDebug(Obj);
307 SymbolObj = DebugObj.getBinary();
308 LoadedObjInfo.reset();
312 std::unique_ptr<DIContext> Context(
313 new DWARFContextInMemory(*SymbolObj,LoadedObjInfo.get()));
315 std::vector<std::pair<SymbolRef, uint64_t>> SymAddr =
316 object::computeSymbolSizes(*SymbolObj);
318 // Use symbol info to iterate functions in the object.
319 for (const auto &P : SymAddr) {
320 object::SymbolRef Sym = P.first;
321 if (Sym.getType() == object::SymbolRef::ST_Function) {
322 ErrorOr<StringRef> Name = Sym.getName();
325 ErrorOr<uint64_t> AddrOrErr = Sym.getAddress();
328 uint64_t Addr = *AddrOrErr;
330 uint64_t Size = P.second;
331 // If we're not using the debug object, compute the address of the
332 // symbol in memory (rather than that in the unrelocated object file)
333 // and use that to query the DWARFContext.
334 if (!UseDebugObj && LoadObjects) {
335 object::section_iterator Sec = *Sym.getSection();
337 Sec->getName(SecName);
338 uint64_t SectionLoadAddress =
339 LoadedObjInfo->getSectionLoadAddress(*Sec);
340 if (SectionLoadAddress != 0)
341 Addr += SectionLoadAddress - Sec->getAddress();
344 outs() << "Function: " << *Name << ", Size = " << Size
345 << ", Addr = " << Addr << "\n";
347 DILineInfoTable Lines = Context->getLineInfoForAddressRange(Addr, Size);
348 for (auto &D : Lines) {
349 outs() << " Line info @ " << D.first - Addr << ": "
350 << D.second.FileName << ", line:" << D.second.Line << "\n";
359 static void doPreallocation(TrivialMemoryManager &MemMgr) {
360 // Allocate a slab of memory upfront, if required. This is used if
361 // we want to test small code models.
362 if (static_cast<intptr_t>(PreallocMemory) < 0)
363 report_fatal_error("Pre-allocated bytes of memory must be a positive integer.");
365 // FIXME: Limit the amount of memory that can be preallocated?
366 if (PreallocMemory != 0)
367 MemMgr.preallocateSlab(PreallocMemory);
370 static int executeInput() {
371 // Load any dylibs requested on the command line.
374 // Instantiate a dynamic linker.
375 TrivialMemoryManager MemMgr;
376 doPreallocation(MemMgr);
377 RuntimeDyld Dyld(MemMgr, MemMgr);
379 // FIXME: Preserve buffers until resolveRelocations time to work around a bug
380 // in RuntimeDyldELF.
381 // This fixme should be fixed ASAP. This is a very brittle workaround.
382 std::vector<std::unique_ptr<MemoryBuffer>> InputBuffers;
384 // If we don't have any input files, read from stdin.
385 if (!InputFileList.size())
386 InputFileList.push_back("-");
387 for (auto &File : InputFileList) {
388 // Load the input memory buffer.
389 ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
390 MemoryBuffer::getFileOrSTDIN(File);
391 if (std::error_code EC = InputBuffer.getError())
392 return Error("unable to read input: '" + EC.message() + "'");
393 ErrorOr<std::unique_ptr<ObjectFile>> MaybeObj(
394 ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));
396 if (std::error_code EC = MaybeObj.getError())
397 return Error("unable to create object file: '" + EC.message() + "'");
399 ObjectFile &Obj = **MaybeObj;
400 InputBuffers.push_back(std::move(*InputBuffer));
402 // Load the object file
403 Dyld.loadObject(Obj);
404 if (Dyld.hasError()) {
405 return Error(Dyld.getErrorString());
409 // Resove all the relocations we can.
410 // FIXME: Error out if there are unresolved relocations.
411 Dyld.resolveRelocations();
413 // Get the address of the entry point (_main by default).
414 void *MainAddress = Dyld.getSymbolLocalAddress(EntryPoint);
416 return Error("no definition for '" + EntryPoint + "'");
418 // Invalidate the instruction cache for each loaded function.
419 for (auto &FM : MemMgr.FunctionMemory) {
421 // Make sure the memory is executable.
422 // setExecutable will call InvalidateInstructionCache.
423 std::string ErrorStr;
424 if (!sys::Memory::setExecutable(FM, &ErrorStr))
425 return Error("unable to mark function executable: '" + ErrorStr + "'");
428 // Dispatch to _main().
429 errs() << "loaded '" << EntryPoint << "' at: " << (void*)MainAddress << "\n";
431 int (*Main)(int, const char**) =
432 (int(*)(int,const char**)) uintptr_t(MainAddress);
433 const char **Argv = new const char*[2];
434 // Use the name of the first input object module as argv[0] for the target.
435 Argv[0] = InputFileList[0].c_str();
437 return Main(1, Argv);
440 static int checkAllExpressions(RuntimeDyldChecker &Checker) {
441 for (const auto& CheckerFileName : CheckFiles) {
442 ErrorOr<std::unique_ptr<MemoryBuffer>> CheckerFileBuf =
443 MemoryBuffer::getFileOrSTDIN(CheckerFileName);
444 if (std::error_code EC = CheckerFileBuf.getError())
445 return Error("unable to read input '" + CheckerFileName + "': " +
448 if (!Checker.checkAllRulesInBuffer("# rtdyld-check:",
449 CheckerFileBuf.get().get()))
450 return Error("some checks in '" + CheckerFileName + "' failed");
455 static std::map<void *, uint64_t>
456 applySpecificSectionMappings(RuntimeDyldChecker &Checker) {
458 std::map<void*, uint64_t> SpecificMappings;
460 for (StringRef Mapping : SpecificSectionMappings) {
462 size_t EqualsIdx = Mapping.find_first_of("=");
463 std::string SectionIDStr = Mapping.substr(0, EqualsIdx);
464 size_t ComaIdx = Mapping.find_first_of(",");
466 if (ComaIdx == StringRef::npos)
467 report_fatal_error("Invalid section specification '" + Mapping +
468 "'. Should be '<file name>,<section name>=<addr>'");
470 std::string FileName = SectionIDStr.substr(0, ComaIdx);
471 std::string SectionName = SectionIDStr.substr(ComaIdx + 1);
474 std::string ErrorMsg;
475 std::tie(OldAddrInt, ErrorMsg) =
476 Checker.getSectionAddr(FileName, SectionName, true);
479 report_fatal_error(ErrorMsg);
481 void* OldAddr = reinterpret_cast<void*>(static_cast<uintptr_t>(OldAddrInt));
483 std::string NewAddrStr = Mapping.substr(EqualsIdx + 1);
486 if (StringRef(NewAddrStr).getAsInteger(0, NewAddr))
487 report_fatal_error("Invalid section address in mapping '" + Mapping +
490 Checker.getRTDyld().mapSectionAddress(OldAddr, NewAddr);
491 SpecificMappings[OldAddr] = NewAddr;
494 return SpecificMappings;
497 // Scatter sections in all directions!
498 // Remaps section addresses for -verify mode. The following command line options
499 // can be used to customize the layout of the memory within the phony target's
501 // -target-addr-start <s> -- Specify where the phony target addres range starts.
502 // -target-addr-end <e> -- Specify where the phony target address range ends.
503 // -target-section-sep <d> -- Specify how big a gap should be left between the
504 // end of one section and the start of the next.
505 // Defaults to zero. Set to something big
506 // (e.g. 1 << 32) to stress-test stubs, GOTs, etc.
508 static void remapSectionsAndSymbols(const llvm::Triple &TargetTriple,
509 TrivialMemoryManager &MemMgr,
510 RuntimeDyldChecker &Checker) {
512 // Set up a work list (section addr/size pairs).
513 typedef std::list<std::pair<void*, uint64_t>> WorklistT;
516 for (const auto& CodeSection : MemMgr.FunctionMemory)
517 Worklist.push_back(std::make_pair(CodeSection.base(), CodeSection.size()));
518 for (const auto& DataSection : MemMgr.DataMemory)
519 Worklist.push_back(std::make_pair(DataSection.base(), DataSection.size()));
521 // Apply any section-specific mappings that were requested on the command
523 typedef std::map<void*, uint64_t> AppliedMappingsT;
524 AppliedMappingsT AppliedMappings = applySpecificSectionMappings(Checker);
526 // Keep an "already allocated" mapping of section target addresses to sizes.
527 // Sections whose address mappings aren't specified on the command line will
528 // allocated around the explicitly mapped sections while maintaining the
529 // minimum separation.
530 std::map<uint64_t, uint64_t> AlreadyAllocated;
532 // Move the previously applied mappings into the already-allocated map.
533 for (WorklistT::iterator I = Worklist.begin(), E = Worklist.end();
535 WorklistT::iterator Tmp = I;
537 AppliedMappingsT::iterator AI = AppliedMappings.find(Tmp->first);
539 if (AI != AppliedMappings.end()) {
540 AlreadyAllocated[AI->second] = Tmp->second;
545 // If the -target-addr-end option wasn't explicitly passed, then set it to a
546 // sensible default based on the target triple.
547 if (TargetAddrEnd.getNumOccurrences() == 0) {
548 if (TargetTriple.isArch16Bit())
549 TargetAddrEnd = (1ULL << 16) - 1;
550 else if (TargetTriple.isArch32Bit())
551 TargetAddrEnd = (1ULL << 32) - 1;
552 // TargetAddrEnd already has a sensible default for 64-bit systems, so
553 // there's nothing to do in the 64-bit case.
556 // Process any elements remaining in the worklist.
557 while (!Worklist.empty()) {
558 std::pair<void*, uint64_t> CurEntry = Worklist.front();
559 Worklist.pop_front();
561 uint64_t NextSectionAddr = TargetAddrStart;
563 for (const auto &Alloc : AlreadyAllocated)
564 if (NextSectionAddr + CurEntry.second + TargetSectionSep <= Alloc.first)
567 NextSectionAddr = Alloc.first + Alloc.second + TargetSectionSep;
569 AlreadyAllocated[NextSectionAddr] = CurEntry.second;
570 Checker.getRTDyld().mapSectionAddress(CurEntry.first, NextSectionAddr);
573 // Add dummy symbols to the memory manager.
574 for (const auto &Mapping : DummySymbolMappings) {
575 size_t EqualsIdx = Mapping.find_first_of("=");
577 if (EqualsIdx == StringRef::npos)
578 report_fatal_error("Invalid dummy symbol specification '" + Mapping +
579 "'. Should be '<symbol name>=<addr>'");
581 std::string Symbol = Mapping.substr(0, EqualsIdx);
582 std::string AddrStr = Mapping.substr(EqualsIdx + 1);
585 if (StringRef(AddrStr).getAsInteger(0, Addr))
586 report_fatal_error("Invalid symbol mapping '" + Mapping + "'.");
588 MemMgr.addDummySymbol(Symbol, Addr);
592 // Load and link the objects specified on the command line, but do not execute
593 // anything. Instead, attach a RuntimeDyldChecker instance and call it to
594 // verify the correctness of the linked memory.
595 static int linkAndVerify() {
597 // Check for missing triple.
598 if (TripleName == "")
599 return Error("-triple required when running in -verify mode.");
601 // Look up the target and build the disassembler.
602 Triple TheTriple(Triple::normalize(TripleName));
603 std::string ErrorStr;
604 const Target *TheTarget =
605 TargetRegistry::lookupTarget("", TheTriple, ErrorStr);
607 return Error("Error accessing target '" + TripleName + "': " + ErrorStr);
609 TripleName = TheTriple.getTriple();
611 std::unique_ptr<MCSubtargetInfo> STI(
612 TheTarget->createMCSubtargetInfo(TripleName, MCPU, ""));
614 return Error("Unable to create subtarget info!");
616 std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
618 return Error("Unable to create target register info!");
620 std::unique_ptr<MCAsmInfo> MAI(TheTarget->createMCAsmInfo(*MRI, TripleName));
622 return Error("Unable to create target asm info!");
624 MCContext Ctx(MAI.get(), MRI.get(), nullptr);
626 std::unique_ptr<MCDisassembler> Disassembler(
627 TheTarget->createMCDisassembler(*STI, Ctx));
629 return Error("Unable to create disassembler!");
631 std::unique_ptr<MCInstrInfo> MII(TheTarget->createMCInstrInfo());
633 std::unique_ptr<MCInstPrinter> InstPrinter(
634 TheTarget->createMCInstPrinter(Triple(TripleName), 0, *MAI, *MII, *MRI));
636 // Load any dylibs requested on the command line.
639 // Instantiate a dynamic linker.
640 TrivialMemoryManager MemMgr;
641 doPreallocation(MemMgr);
642 RuntimeDyld Dyld(MemMgr, MemMgr);
643 Dyld.setProcessAllSections(true);
644 RuntimeDyldChecker Checker(Dyld, Disassembler.get(), InstPrinter.get(),
647 // FIXME: Preserve buffers until resolveRelocations time to work around a bug
648 // in RuntimeDyldELF.
649 // This fixme should be fixed ASAP. This is a very brittle workaround.
650 std::vector<std::unique_ptr<MemoryBuffer>> InputBuffers;
652 // If we don't have any input files, read from stdin.
653 if (!InputFileList.size())
654 InputFileList.push_back("-");
655 for (auto &Filename : InputFileList) {
656 // Load the input memory buffer.
657 ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
658 MemoryBuffer::getFileOrSTDIN(Filename);
660 if (std::error_code EC = InputBuffer.getError())
661 return Error("unable to read input: '" + EC.message() + "'");
663 ErrorOr<std::unique_ptr<ObjectFile>> MaybeObj(
664 ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));
666 if (std::error_code EC = MaybeObj.getError())
667 return Error("unable to create object file: '" + EC.message() + "'");
669 ObjectFile &Obj = **MaybeObj;
670 InputBuffers.push_back(std::move(*InputBuffer));
672 // Load the object file
673 Dyld.loadObject(Obj);
674 if (Dyld.hasError()) {
675 return Error(Dyld.getErrorString());
679 // Re-map the section addresses into the phony target address space and add
681 remapSectionsAndSymbols(TheTriple, MemMgr, Checker);
683 // Resolve all the relocations we can.
684 Dyld.resolveRelocations();
686 // Register EH frames.
687 Dyld.registerEHFrames();
689 int ErrorCode = checkAllExpressions(Checker);
691 return Error("RTDyld reported an error applying relocations:\n " +
692 Dyld.getErrorString());
697 int main(int argc, char **argv) {
698 sys::PrintStackTraceOnErrorSignal();
699 PrettyStackTraceProgram X(argc, argv);
701 ProgramName = argv[0];
702 llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
704 llvm::InitializeAllTargetInfos();
705 llvm::InitializeAllTargetMCs();
706 llvm::InitializeAllDisassemblers();
708 cl::ParseCommandLineOptions(argc, argv, "llvm MC-JIT tool\n");
712 return executeInput();
713 case AC_PrintDebugLineInfo:
714 return printLineInfoForInput(/* LoadObjects */ true,/* UseDebugObj */ true);
715 case AC_PrintLineInfo:
716 return printLineInfoForInput(/* LoadObjects */ true,/* UseDebugObj */false);
717 case AC_PrintObjectLineInfo:
718 return printLineInfoForInput(/* LoadObjects */false,/* UseDebugObj */false);
720 return linkAndVerify();