+static int checkAllExpressions(RuntimeDyldChecker &Checker) {
+ for (const auto& CheckerFileName : CheckFiles) {
+ ErrorOr<std::unique_ptr<MemoryBuffer>> CheckerFileBuf =
+ MemoryBuffer::getFileOrSTDIN(CheckerFileName);
+ if (std::error_code EC = CheckerFileBuf.getError())
+ return Error("unable to read input '" + CheckerFileName + "': " +
+ EC.message());
+
+ if (!Checker.checkAllRulesInBuffer("# rtdyld-check:",
+ CheckerFileBuf.get().get()))
+ return Error("some checks in '" + CheckerFileName + "' failed");
+ }
+ return 0;
+}
+
+static std::map<void *, uint64_t>
+applySpecificSectionMappings(RuntimeDyldChecker &Checker) {
+
+ std::map<void*, uint64_t> SpecificMappings;
+
+ for (StringRef Mapping : SpecificSectionMappings) {
+
+ size_t EqualsIdx = Mapping.find_first_of("=");
+ std::string SectionIDStr = Mapping.substr(0, EqualsIdx);
+ size_t ComaIdx = Mapping.find_first_of(",");
+
+ if (ComaIdx == StringRef::npos) {
+ errs() << "Invalid section specification '" << Mapping
+ << "'. Should be '<file name>,<section name>=<addr>'\n";
+ exit(1);
+ }
+
+ std::string FileName = SectionIDStr.substr(0, ComaIdx);
+ std::string SectionName = SectionIDStr.substr(ComaIdx + 1);
+
+ uint64_t OldAddrInt;
+ std::string ErrorMsg;
+ std::tie(OldAddrInt, ErrorMsg) =
+ Checker.getSectionAddr(FileName, SectionName, true);
+
+ if (ErrorMsg != "") {
+ errs() << ErrorMsg;
+ exit(1);
+ }
+
+ void* OldAddr = reinterpret_cast<void*>(static_cast<uintptr_t>(OldAddrInt));
+
+ std::string NewAddrStr = Mapping.substr(EqualsIdx + 1);
+ uint64_t NewAddr;
+
+ if (StringRef(NewAddrStr).getAsInteger(0, NewAddr)) {
+ errs() << "Invalid section address in mapping '" << Mapping << "'.\n";
+ exit(1);
+ }
+
+ Checker.getRTDyld().mapSectionAddress(OldAddr, NewAddr);
+ SpecificMappings[OldAddr] = NewAddr;
+ }
+
+ return SpecificMappings;
+}
+
+// Scatter sections in all directions!
+// Remaps section addresses for -verify mode. The following command line options
+// can be used to customize the layout of the memory within the phony target's
+// address space:
+// -target-addr-start <s> -- Specify where the phony target addres range starts.
+// -target-addr-end <e> -- Specify where the phony target address range ends.
+// -target-section-sep <d> -- Specify how big a gap should be left between the
+// end of one section and the start of the next.
+// Defaults to zero. Set to something big
+// (e.g. 1 << 32) to stress-test stubs, GOTs, etc.
+//
+static void remapSectionsAndSymbols(const llvm::Triple &TargetTriple,
+ TrivialMemoryManager &MemMgr,
+ RuntimeDyldChecker &Checker) {
+
+ // Set up a work list (section addr/size pairs).
+ typedef std::list<std::pair<void*, uint64_t>> WorklistT;
+ WorklistT Worklist;
+
+ for (const auto& CodeSection : MemMgr.FunctionMemory)
+ Worklist.push_back(std::make_pair(CodeSection.base(), CodeSection.size()));
+ for (const auto& DataSection : MemMgr.DataMemory)
+ Worklist.push_back(std::make_pair(DataSection.base(), DataSection.size()));
+
+ // Apply any section-specific mappings that were requested on the command
+ // line.
+ typedef std::map<void*, uint64_t> AppliedMappingsT;
+ AppliedMappingsT AppliedMappings = applySpecificSectionMappings(Checker);
+
+ // Keep an "already allocated" mapping of section target addresses to sizes.
+ // Sections whose address mappings aren't specified on the command line will
+ // allocated around the explicitly mapped sections while maintaining the
+ // minimum separation.
+ std::map<uint64_t, uint64_t> AlreadyAllocated;
+
+ // Move the previously applied mappings into the already-allocated map.
+ for (WorklistT::iterator I = Worklist.begin(), E = Worklist.end();
+ I != E;) {
+ WorklistT::iterator Tmp = I;
+ ++I;
+ AppliedMappingsT::iterator AI = AppliedMappings.find(Tmp->first);
+
+ if (AI != AppliedMappings.end()) {
+ AlreadyAllocated[AI->second] = Tmp->second;
+ Worklist.erase(Tmp);
+ }
+ }
+
+ // If the -target-addr-end option wasn't explicitly passed, then set it to a
+ // sensible default based on the target triple.
+ if (TargetAddrEnd.getNumOccurrences() == 0) {
+ if (TargetTriple.isArch16Bit())
+ TargetAddrEnd = (1ULL << 16) - 1;
+ else if (TargetTriple.isArch32Bit())
+ TargetAddrEnd = (1ULL << 32) - 1;
+ // TargetAddrEnd already has a sensible default for 64-bit systems, so
+ // there's nothing to do in the 64-bit case.
+ }
+
+ // Process any elements remaining in the worklist.
+ while (!Worklist.empty()) {
+ std::pair<void*, uint64_t> CurEntry = Worklist.front();
+ Worklist.pop_front();
+
+ uint64_t NextSectionAddr = TargetAddrStart;
+
+ for (const auto &Alloc : AlreadyAllocated)
+ if (NextSectionAddr + CurEntry.second + TargetSectionSep <= Alloc.first)
+ break;
+ else
+ NextSectionAddr = Alloc.first + Alloc.second + TargetSectionSep;
+
+ AlreadyAllocated[NextSectionAddr] = CurEntry.second;
+ Checker.getRTDyld().mapSectionAddress(CurEntry.first, NextSectionAddr);
+ }
+
+ // Add dummy symbols to the memory manager.
+ for (const auto &Mapping : DummySymbolMappings) {
+ size_t EqualsIdx = Mapping.find_first_of("=");
+
+ if (EqualsIdx == StringRef::npos) {
+ errs() << "Invalid dummy symbol specification '" << Mapping
+ << "'. Should be '<symbol name>=<addr>'\n";
+ exit(1);
+ }
+
+ std::string Symbol = Mapping.substr(0, EqualsIdx);
+ std::string AddrStr = Mapping.substr(EqualsIdx + 1);
+
+ uint64_t Addr;
+ if (StringRef(AddrStr).getAsInteger(0, Addr)) {
+ errs() << "Invalid symbol mapping '" << Mapping << "'.\n";
+ exit(1);
+ }
+
+ MemMgr.addDummySymbol(Symbol, Addr);
+ }
+}
+
+// Load and link the objects specified on the command line, but do not execute
+// anything. Instead, attach a RuntimeDyldChecker instance and call it to
+// verify the correctness of the linked memory.
+static int linkAndVerify() {
+
+ // Check for missing triple.
+ if (TripleName == "") {
+ llvm::errs() << "Error: -triple required when running in -verify mode.\n";
+ return 1;
+ }
+
+ // Look up the target and build the disassembler.
+ Triple TheTriple(Triple::normalize(TripleName));
+ std::string ErrorStr;
+ const Target *TheTarget =
+ TargetRegistry::lookupTarget("", TheTriple, ErrorStr);
+ if (!TheTarget) {
+ llvm::errs() << "Error accessing target '" << TripleName << "': "
+ << ErrorStr << "\n";
+ return 1;
+ }
+ TripleName = TheTriple.getTriple();
+
+ std::unique_ptr<MCSubtargetInfo> STI(
+ TheTarget->createMCSubtargetInfo(TripleName, MCPU, ""));
+ assert(STI && "Unable to create subtarget info!");
+
+ std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
+ assert(MRI && "Unable to create target register info!");
+
+ std::unique_ptr<MCAsmInfo> MAI(TheTarget->createMCAsmInfo(*MRI, TripleName));
+ assert(MAI && "Unable to create target asm info!");
+
+ MCContext Ctx(MAI.get(), MRI.get(), nullptr);
+
+ std::unique_ptr<MCDisassembler> Disassembler(
+ TheTarget->createMCDisassembler(*STI, Ctx));
+ assert(Disassembler && "Unable to create disassembler!");
+
+ std::unique_ptr<MCInstrInfo> MII(TheTarget->createMCInstrInfo());
+
+ std::unique_ptr<MCInstPrinter> InstPrinter(
+ TheTarget->createMCInstPrinter(Triple(TripleName), 0, *MAI, *MII, *MRI));
+
+ // Load any dylibs requested on the command line.
+ loadDylibs();
+
+ // Instantiate a dynamic linker.
+ TrivialMemoryManager MemMgr;
+ RuntimeDyld Dyld(MemMgr, MemMgr);
+ Dyld.setProcessAllSections(true);
+ RuntimeDyldChecker Checker(Dyld, Disassembler.get(), InstPrinter.get(),
+ llvm::dbgs());
+
+ // FIXME: Preserve buffers until resolveRelocations time to work around a bug
+ // in RuntimeDyldELF.
+ // This fixme should be fixed ASAP. This is a very brittle workaround.
+ std::vector<std::unique_ptr<MemoryBuffer>> InputBuffers;
+
+ // If we don't have any input files, read from stdin.
+ if (!InputFileList.size())
+ InputFileList.push_back("-");
+ for (auto &Filename : InputFileList) {
+ // Load the input memory buffer.
+ ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
+ MemoryBuffer::getFileOrSTDIN(Filename);
+
+ if (std::error_code EC = InputBuffer.getError())
+ return Error("unable to read input: '" + EC.message() + "'");
+
+ ErrorOr<std::unique_ptr<ObjectFile>> MaybeObj(
+ ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));
+
+ if (std::error_code EC = MaybeObj.getError())
+ return Error("unable to create object file: '" + EC.message() + "'");
+
+ ObjectFile &Obj = **MaybeObj;
+ InputBuffers.push_back(std::move(*InputBuffer));
+
+ // Load the object file
+ Dyld.loadObject(Obj);
+ if (Dyld.hasError()) {
+ return Error(Dyld.getErrorString());
+ }
+ }
+
+ // Re-map the section addresses into the phony target address space and add
+ // dummy symbols.
+ remapSectionsAndSymbols(TheTriple, MemMgr, Checker);
+
+ // Resolve all the relocations we can.
+ Dyld.resolveRelocations();
+
+ // Register EH frames.
+ Dyld.registerEHFrames();
+
+ int ErrorCode = checkAllExpressions(Checker);
+ if (Dyld.hasError()) {
+ errs() << "RTDyld reported an error applying relocations:\n "
+ << Dyld.getErrorString() << "\n";
+ ErrorCode = 1;
+ }
+
+ return ErrorCode;
+}
+