| //===- llvm-ld.cpp - LLVM 'ld' compatible linker --------------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This utility is intended to be compatible with GCC, and follows standard |
| // system 'ld' conventions. As such, the default output file is ./a.out. |
| // Additionally, this program outputs a shell script that is used to invoke LLI |
| // to execute the program. In this manner, the generated executable (a.out for |
| // example), is directly executable, whereas the bitcode file actually lives in |
| // the a.out.bc file generated by this program. Also, Force is on by default. |
| // |
| // Note that if someone (or a script) deletes the executable program generated, |
| // the .bc file will be left around. Considering that this is a temporary hack, |
| // I'm not too worried about this. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/LinkAllVMCore.h" |
| #include "llvm/Linker.h" |
| #include "llvm/LLVMContext.h" |
| #include "llvm/System/Program.h" |
| #include "llvm/Module.h" |
| #include "llvm/PassManager.h" |
| #include "llvm/Bitcode/ReaderWriter.h" |
| #include "llvm/Target/TargetData.h" |
| #include "llvm/Target/TargetMachine.h" |
| #include "llvm/Support/CommandLine.h" |
| #include "llvm/Support/FileUtilities.h" |
| #include "llvm/Support/ManagedStatic.h" |
| #include "llvm/Support/MemoryBuffer.h" |
| #include "llvm/Support/PrettyStackTrace.h" |
| #include "llvm/Support/SystemUtils.h" |
| #include "llvm/System/Signals.h" |
| #include "llvm/Config/config.h" |
| #include <memory> |
| #include <cstring> |
| using namespace llvm; |
| |
| // Input/Output Options |
| static cl::list<std::string> InputFilenames(cl::Positional, cl::OneOrMore, |
| cl::desc("<input bitcode files>")); |
| |
| static cl::opt<std::string> OutputFilename("o", cl::init("a.out"), |
| cl::desc("Override output filename"), |
| cl::value_desc("filename")); |
| |
| static cl::opt<std::string> BitcodeOutputFilename("b", cl::init(""), |
| cl::desc("Override bitcode output filename"), |
| cl::value_desc("filename")); |
| |
| static cl::opt<bool> Verbose("v", |
| cl::desc("Print information about actions taken")); |
| |
| static cl::list<std::string> LibPaths("L", cl::Prefix, |
| cl::desc("Specify a library search path"), |
| cl::value_desc("directory")); |
| |
| static cl::list<std::string> FrameworkPaths("F", cl::Prefix, |
| cl::desc("Specify a framework search path"), |
| cl::value_desc("directory")); |
| |
| static cl::list<std::string> Libraries("l", cl::Prefix, |
| cl::desc("Specify libraries to link to"), |
| cl::value_desc("library prefix")); |
| |
| static cl::list<std::string> Frameworks("framework", |
| cl::desc("Specify frameworks to link to"), |
| cl::value_desc("framework")); |
| |
| // Options to control the linking, optimization, and code gen processes |
| static cl::opt<bool> LinkAsLibrary("link-as-library", |
| cl::desc("Link the .bc files together as a library, not an executable")); |
| |
| static cl::alias Relink("r", cl::aliasopt(LinkAsLibrary), |
| cl::desc("Alias for -link-as-library")); |
| |
| static cl::opt<bool> Native("native", |
| cl::desc("Generate a native binary instead of a shell script")); |
| |
| static cl::opt<bool>NativeCBE("native-cbe", |
| cl::desc("Generate a native binary with the C backend and GCC")); |
| |
| static cl::list<std::string> PostLinkOpts("post-link-opts", |
| cl::value_desc("path"), |
| cl::desc("Run one or more optimization programs after linking")); |
| |
| static cl::list<std::string> XLinker("Xlinker", cl::value_desc("option"), |
| cl::desc("Pass options to the system linker")); |
| |
| // Compatibility options that llvm-ld ignores but are supported for |
| // compatibility with LD |
| static cl::opt<std::string> CO3("soname", cl::Hidden, |
| cl::desc("Compatibility option: ignored")); |
| |
| static cl::opt<std::string> CO4("version-script", cl::Hidden, |
| cl::desc("Compatibility option: ignored")); |
| |
| static cl::opt<bool> CO5("eh-frame-hdr", cl::Hidden, |
| cl::desc("Compatibility option: ignored")); |
| |
| static cl::opt<std::string> CO6("h", cl::Hidden, |
| cl::desc("Compatibility option: ignored")); |
| |
| static cl::opt<bool> CO7("start-group", cl::Hidden, |
| cl::desc("Compatibility option: ignored")); |
| |
| static cl::opt<bool> CO8("end-group", cl::Hidden, |
| cl::desc("Compatibility option: ignored")); |
| |
| static cl::opt<std::string> CO9("m", cl::Hidden, |
| cl::desc("Compatibility option: ignored")); |
| |
| /// This is just for convenience so it doesn't have to be passed around |
| /// everywhere. |
| static std::string progname; |
| |
| /// PrintAndExit - Prints a message to standard error and exits with error code |
| /// |
| /// Inputs: |
| /// Message - The message to print to standard error. |
| /// |
| static void PrintAndExit(const std::string &Message, int errcode = 1) { |
| errs() << progname << ": " << Message << "\n"; |
| llvm_shutdown(); |
| exit(errcode); |
| } |
| |
| static void PrintCommand(const std::vector<const char*> &args) { |
| std::vector<const char*>::const_iterator I = args.begin(), E = args.end(); |
| for (; I != E; ++I) |
| if (*I) |
| outs() << "'" << *I << "'" << " "; |
| outs() << "\n"; outs().flush(); |
| } |
| |
| /// CopyEnv - This function takes an array of environment variables and makes a |
| /// copy of it. This copy can then be manipulated any way the caller likes |
| /// without affecting the process's real environment. |
| /// |
| /// Inputs: |
| /// envp - An array of C strings containing an environment. |
| /// |
| /// Return value: |
| /// NULL - An error occurred. |
| /// |
| /// Otherwise, a pointer to a new array of C strings is returned. Every string |
| /// in the array is a duplicate of the one in the original array (i.e. we do |
| /// not copy the char *'s from one array to another). |
| /// |
| static char ** CopyEnv(char ** const envp) { |
| // Count the number of entries in the old list; |
| unsigned entries; // The number of entries in the old environment list |
| for (entries = 0; envp[entries] != NULL; entries++) |
| /*empty*/; |
| |
| // Add one more entry for the NULL pointer that ends the list. |
| ++entries; |
| |
| // If there are no entries at all, just return NULL. |
| if (entries == 0) |
| return NULL; |
| |
| // Allocate a new environment list. |
| char **newenv = new char* [entries]; |
| if ((newenv = new char* [entries]) == NULL) |
| return NULL; |
| |
| // Make a copy of the list. Don't forget the NULL that ends the list. |
| entries = 0; |
| while (envp[entries] != NULL) { |
| newenv[entries] = new char[strlen (envp[entries]) + 1]; |
| strcpy (newenv[entries], envp[entries]); |
| ++entries; |
| } |
| newenv[entries] = NULL; |
| |
| return newenv; |
| } |
| |
| |
| /// RemoveEnv - Remove the specified environment variable from the environment |
| /// array. |
| /// |
| /// Inputs: |
| /// name - The name of the variable to remove. It cannot be NULL. |
| /// envp - The array of environment variables. It cannot be NULL. |
| /// |
| /// Notes: |
| /// This is mainly done because functions to remove items from the environment |
| /// are not available across all platforms. In particular, Solaris does not |
| /// seem to have an unsetenv() function or a setenv() function (or they are |
| /// undocumented if they do exist). |
| /// |
| static void RemoveEnv(const char * name, char ** const envp) { |
| for (unsigned index=0; envp[index] != NULL; index++) { |
| // Find the first equals sign in the array and make it an EOS character. |
| char *p = strchr (envp[index], '='); |
| if (p == NULL) |
| continue; |
| else |
| *p = '\0'; |
| |
| // Compare the two strings. If they are equal, zap this string. |
| // Otherwise, restore it. |
| if (!strcmp(name, envp[index])) |
| *envp[index] = '\0'; |
| else |
| *p = '='; |
| } |
| |
| return; |
| } |
| |
| /// GenerateBitcode - generates a bitcode file from the module provided |
| void GenerateBitcode(Module* M, const std::string& FileName) { |
| |
| if (Verbose) |
| outs() << "Generating Bitcode To " << FileName << '\n'; |
| |
| // Create the output file. |
| std::string ErrorInfo; |
| raw_fd_ostream Out(FileName.c_str(), /*Binary=*/true, /*Force=*/true, |
| ErrorInfo); |
| if (!ErrorInfo.empty()) |
| PrintAndExit(ErrorInfo); |
| |
| // Ensure that the bitcode file gets removed from the disk if we get a |
| // terminating signal. |
| sys::RemoveFileOnSignal(sys::Path(FileName)); |
| |
| // Write it out |
| WriteBitcodeToFile(M, Out); |
| |
| // Close the bitcode file. |
| Out.close(); |
| } |
| |
| /// GenerateAssembly - generates a native assembly language source file from the |
| /// specified bitcode file. |
| /// |
| /// Inputs: |
| /// InputFilename - The name of the input bitcode file. |
| /// OutputFilename - The name of the file to generate. |
| /// llc - The pathname to use for LLC. |
| /// envp - The environment to use when running LLC. |
| /// |
| /// Return non-zero value on error. |
| /// |
| static int GenerateAssembly(const std::string &OutputFilename, |
| const std::string &InputFilename, |
| const sys::Path &llc, |
| std::string &ErrMsg ) { |
| // Run LLC to convert the bitcode file into assembly code. |
| std::vector<const char*> args; |
| args.push_back(llc.c_str()); |
| // We will use GCC to assemble the program so set the assembly syntax to AT&T, |
| // regardless of what the target in the bitcode file is. |
| args.push_back("-x86-asm-syntax=att"); |
| args.push_back("-f"); |
| args.push_back("-o"); |
| args.push_back(OutputFilename.c_str()); |
| args.push_back(InputFilename.c_str()); |
| args.push_back(0); |
| |
| if (Verbose) { |
| outs() << "Generating Assembly With: \n"; |
| PrintCommand(args); |
| } |
| |
| return sys::Program::ExecuteAndWait(llc, &args[0], 0, 0, 0, 0, &ErrMsg); |
| } |
| |
| /// GenerateCFile - generates a C source file from the specified bitcode file. |
| static int GenerateCFile(const std::string &OutputFile, |
| const std::string &InputFile, |
| const sys::Path &llc, |
| std::string& ErrMsg) { |
| // Run LLC to convert the bitcode file into C. |
| std::vector<const char*> args; |
| args.push_back(llc.c_str()); |
| args.push_back("-march=c"); |
| args.push_back("-f"); |
| args.push_back("-o"); |
| args.push_back(OutputFile.c_str()); |
| args.push_back(InputFile.c_str()); |
| args.push_back(0); |
| |
| if (Verbose) { |
| outs() << "Generating C Source With: \n"; |
| PrintCommand(args); |
| } |
| |
| return sys::Program::ExecuteAndWait(llc, &args[0], 0, 0, 0, 0, &ErrMsg); |
| } |
| |
| /// GenerateNative - generates a native object file from the |
| /// specified bitcode file. |
| /// |
| /// Inputs: |
| /// InputFilename - The name of the input bitcode file. |
| /// OutputFilename - The name of the file to generate. |
| /// NativeLinkItems - The native libraries, files, code with which to link |
| /// LibPaths - The list of directories in which to find libraries. |
| /// FrameworksPaths - The list of directories in which to find frameworks. |
| /// Frameworks - The list of frameworks (dynamic libraries) |
| /// gcc - The pathname to use for GGC. |
| /// envp - A copy of the process's current environment. |
| /// |
| /// Outputs: |
| /// None. |
| /// |
| /// Returns non-zero value on error. |
| /// |
| static int GenerateNative(const std::string &OutputFilename, |
| const std::string &InputFilename, |
| const Linker::ItemList &LinkItems, |
| const sys::Path &gcc, char ** const envp, |
| std::string& ErrMsg) { |
| // Remove these environment variables from the environment of the |
| // programs that we will execute. It appears that GCC sets these |
| // environment variables so that the programs it uses can configure |
| // themselves identically. |
| // |
| // However, when we invoke GCC below, we want it to use its normal |
| // configuration. Hence, we must sanitize its environment. |
| char ** clean_env = CopyEnv(envp); |
| if (clean_env == NULL) |
| return 1; |
| RemoveEnv("LIBRARY_PATH", clean_env); |
| RemoveEnv("COLLECT_GCC_OPTIONS", clean_env); |
| RemoveEnv("GCC_EXEC_PREFIX", clean_env); |
| RemoveEnv("COMPILER_PATH", clean_env); |
| RemoveEnv("COLLECT_GCC", clean_env); |
| |
| |
| // Run GCC to assemble and link the program into native code. |
| // |
| // Note: |
| // We can't just assemble and link the file with the system assembler |
| // and linker because we don't know where to put the _start symbol. |
| // GCC mysteriously knows how to do it. |
| std::vector<std::string> args; |
| args.push_back(gcc.c_str()); |
| args.push_back("-fno-strict-aliasing"); |
| args.push_back("-O3"); |
| args.push_back("-o"); |
| args.push_back(OutputFilename); |
| args.push_back(InputFilename); |
| |
| // Add in the library and framework paths |
| for (unsigned index = 0; index < LibPaths.size(); index++) { |
| args.push_back("-L" + LibPaths[index]); |
| } |
| for (unsigned index = 0; index < FrameworkPaths.size(); index++) { |
| args.push_back("-F" + FrameworkPaths[index]); |
| } |
| |
| // Add the requested options |
| for (unsigned index = 0; index < XLinker.size(); index++) |
| args.push_back(XLinker[index]); |
| |
| // Add in the libraries to link. |
| for (unsigned index = 0; index < LinkItems.size(); index++) |
| if (LinkItems[index].first != "crtend") { |
| if (LinkItems[index].second) |
| args.push_back("-l" + LinkItems[index].first); |
| else |
| args.push_back(LinkItems[index].first); |
| } |
| |
| // Add in frameworks to link. |
| for (unsigned index = 0; index < Frameworks.size(); index++) { |
| args.push_back("-framework"); |
| args.push_back(Frameworks[index]); |
| } |
| |
| // Now that "args" owns all the std::strings for the arguments, call the c_str |
| // method to get the underlying string array. We do this game so that the |
| // std::string array is guaranteed to outlive the const char* array. |
| std::vector<const char *> Args; |
| for (unsigned i = 0, e = args.size(); i != e; ++i) |
| Args.push_back(args[i].c_str()); |
| Args.push_back(0); |
| |
| if (Verbose) { |
| outs() << "Generating Native Executable With:\n"; |
| PrintCommand(Args); |
| } |
| |
| // Run the compiler to assembly and link together the program. |
| int R = sys::Program::ExecuteAndWait( |
| gcc, &Args[0], (const char**)clean_env, 0, 0, 0, &ErrMsg); |
| delete [] clean_env; |
| return R; |
| } |
| |
| /// EmitShellScript - Output the wrapper file that invokes the JIT on the LLVM |
| /// bitcode file for the program. |
| static void EmitShellScript(char **argv) { |
| if (Verbose) |
| outs() << "Emitting Shell Script\n"; |
| #if defined(_WIN32) || defined(__CYGWIN__) |
| // Windows doesn't support #!/bin/sh style shell scripts in .exe files. To |
| // support windows systems, we copy the llvm-stub.exe executable from the |
| // build tree to the destination file. |
| std::string ErrMsg; |
| sys::Path llvmstub = FindExecutable("llvm-stub.exe", argv[0]); |
| if (llvmstub.isEmpty()) |
| PrintAndExit("Could not find llvm-stub.exe executable!"); |
| |
| if (0 != sys::CopyFile(sys::Path(OutputFilename), llvmstub, &ErrMsg)) |
| PrintAndExit(ErrMsg); |
| |
| return; |
| #endif |
| |
| // Output the script to start the program... |
| std::string ErrorInfo; |
| raw_fd_ostream Out2(OutputFilename.c_str(), /*Binary=*/false, /*Force=*/true, |
| ErrorInfo); |
| if (!ErrorInfo.empty()) |
| PrintAndExit(ErrorInfo); |
| |
| Out2 << "#!/bin/sh\n"; |
| // Allow user to setenv LLVMINTERP if lli is not in their PATH. |
| Out2 << "lli=${LLVMINTERP-lli}\n"; |
| Out2 << "exec $lli \\\n"; |
| // gcc accepts -l<lib> and implicitly searches /lib and /usr/lib. |
| LibPaths.push_back("/lib"); |
| LibPaths.push_back("/usr/lib"); |
| LibPaths.push_back("/usr/X11R6/lib"); |
| // We don't need to link in libc! In fact, /usr/lib/libc.so may not be a |
| // shared object at all! See RH 8: plain text. |
| std::vector<std::string>::iterator libc = |
| std::find(Libraries.begin(), Libraries.end(), "c"); |
| if (libc != Libraries.end()) Libraries.erase(libc); |
| // List all the shared object (native) libraries this executable will need |
| // on the command line, so that we don't have to do this manually! |
| for (std::vector<std::string>::iterator i = Libraries.begin(), |
| e = Libraries.end(); i != e; ++i) { |
| // try explicit -L arguments first: |
| sys::Path FullLibraryPath; |
| for (cl::list<std::string>::const_iterator P = LibPaths.begin(), |
| E = LibPaths.end(); P != E; ++P) { |
| FullLibraryPath = *P; |
| FullLibraryPath.appendComponent("lib" + *i); |
| FullLibraryPath.appendSuffix(&(LTDL_SHLIB_EXT[1])); |
| if (!FullLibraryPath.isEmpty()) { |
| if (!FullLibraryPath.isDynamicLibrary()) { |
| // Not a native shared library; mark as invalid |
| FullLibraryPath = sys::Path(); |
| } else break; |
| } |
| } |
| if (FullLibraryPath.isEmpty()) |
| FullLibraryPath = sys::Path::FindLibrary(*i); |
| if (!FullLibraryPath.isEmpty()) |
| Out2 << " -load=" << FullLibraryPath.toString() << " \\\n"; |
| } |
| Out2 << " " << BitcodeOutputFilename << " ${1+\"$@\"}\n"; |
| Out2.close(); |
| } |
| |
| // BuildLinkItems -- This function generates a LinkItemList for the LinkItems |
| // linker function by combining the Files and Libraries in the order they were |
| // declared on the command line. |
| static void BuildLinkItems( |
| Linker::ItemList& Items, |
| const cl::list<std::string>& Files, |
| const cl::list<std::string>& Libraries) { |
| |
| // Build the list of linkage items for LinkItems. |
| |
| cl::list<std::string>::const_iterator fileIt = Files.begin(); |
| cl::list<std::string>::const_iterator libIt = Libraries.begin(); |
| |
| int libPos = -1, filePos = -1; |
| while ( libIt != Libraries.end() || fileIt != Files.end() ) { |
| if (libIt != Libraries.end()) |
| libPos = Libraries.getPosition(libIt - Libraries.begin()); |
| else |
| libPos = -1; |
| if (fileIt != Files.end()) |
| filePos = Files.getPosition(fileIt - Files.begin()); |
| else |
| filePos = -1; |
| |
| if (filePos != -1 && (libPos == -1 || filePos < libPos)) { |
| // Add a source file |
| Items.push_back(std::make_pair(*fileIt++, false)); |
| } else if (libPos != -1 && (filePos == -1 || libPos < filePos)) { |
| // Add a library |
| Items.push_back(std::make_pair(*libIt++, true)); |
| } |
| } |
| } |
| |
| // Rightly this should go in a header file but it just seems such a waste. |
| namespace llvm { |
| extern void Optimize(Module*); |
| } |
| |
| int main(int argc, char **argv, char **envp) { |
| // Print a stack trace if we signal out. |
| sys::PrintStackTraceOnErrorSignal(); |
| PrettyStackTraceProgram X(argc, argv); |
| |
| LLVMContext &Context = getGlobalContext(); |
| llvm_shutdown_obj Y; // Call llvm_shutdown() on exit. |
| try { |
| // Initial global variable above for convenience printing of program name. |
| progname = sys::Path(argv[0]).getBasename(); |
| |
| // Parse the command line options |
| cl::ParseCommandLineOptions(argc, argv, "llvm linker\n"); |
| |
| // Construct a Linker (now that Verbose is set) |
| Linker TheLinker(progname, OutputFilename, Context, Verbose); |
| |
| // Keep track of the native link items (versus the bitcode items) |
| Linker::ItemList NativeLinkItems; |
| |
| // Add library paths to the linker |
| TheLinker.addPaths(LibPaths); |
| TheLinker.addSystemPaths(); |
| |
| // Remove any consecutive duplicates of the same library... |
| Libraries.erase(std::unique(Libraries.begin(), Libraries.end()), |
| Libraries.end()); |
| |
| if (LinkAsLibrary) { |
| std::vector<sys::Path> Files; |
| for (unsigned i = 0; i < InputFilenames.size(); ++i ) |
| Files.push_back(sys::Path(InputFilenames[i])); |
| if (TheLinker.LinkInFiles(Files)) |
| return 1; // Error already printed |
| |
| // The libraries aren't linked in but are noted as "dependent" in the |
| // module. |
| for (cl::list<std::string>::const_iterator I = Libraries.begin(), |
| E = Libraries.end(); I != E ; ++I) { |
| TheLinker.getModule()->addLibrary(*I); |
| } |
| } else { |
| // Build a list of the items from our command line |
| Linker::ItemList Items; |
| BuildLinkItems(Items, InputFilenames, Libraries); |
| |
| // Link all the items together |
| if (TheLinker.LinkInItems(Items, NativeLinkItems) ) |
| return 1; // Error already printed |
| } |
| |
| std::auto_ptr<Module> Composite(TheLinker.releaseModule()); |
| |
| // Optimize the module |
| Optimize(Composite.get()); |
| |
| #if defined(_WIN32) || defined(__CYGWIN__) |
| if (!LinkAsLibrary) { |
| // Default to "a.exe" instead of "a.out". |
| if (OutputFilename.getNumOccurrences() == 0) |
| OutputFilename = "a.exe"; |
| |
| // If there is no suffix add an "exe" one. |
| sys::Path ExeFile( OutputFilename ); |
| if (ExeFile.getSuffix() == "") { |
| ExeFile.appendSuffix("exe"); |
| OutputFilename = ExeFile.toString(); |
| } |
| } |
| #endif |
| |
| // Generate the bitcode for the optimized module. |
| // If -b wasn't specified, use the name specified |
| // with -o to construct BitcodeOutputFilename. |
| if (BitcodeOutputFilename.empty()) { |
| BitcodeOutputFilename = OutputFilename; |
| if (!LinkAsLibrary) BitcodeOutputFilename += ".bc"; |
| } |
| |
| GenerateBitcode(Composite.get(), BitcodeOutputFilename); |
| |
| // If we are not linking a library, generate either a native executable |
| // or a JIT shell script, depending upon what the user wants. |
| if (!LinkAsLibrary) { |
| // If the user wants to run a post-link optimization, run it now. |
| if (!PostLinkOpts.empty()) { |
| std::vector<std::string> opts = PostLinkOpts; |
| for (std::vector<std::string>::iterator I = opts.begin(), |
| E = opts.end(); I != E; ++I) { |
| sys::Path prog(*I); |
| if (!prog.canExecute()) { |
| prog = sys::Program::FindProgramByName(*I); |
| if (prog.isEmpty()) |
| PrintAndExit(std::string("Optimization program '") + *I + |
| "' is not found or not executable."); |
| } |
| // Get the program arguments |
| sys::Path tmp_output("opt_result"); |
| std::string ErrMsg; |
| if (tmp_output.createTemporaryFileOnDisk(true, &ErrMsg)) |
| PrintAndExit(ErrMsg); |
| |
| const char* args[4]; |
| args[0] = I->c_str(); |
| args[1] = BitcodeOutputFilename.c_str(); |
| args[2] = tmp_output.c_str(); |
| args[3] = 0; |
| if (0 == sys::Program::ExecuteAndWait(prog, args, 0,0,0,0, &ErrMsg)) { |
| if (tmp_output.isBitcodeFile() || tmp_output.isBitcodeFile()) { |
| sys::Path target(BitcodeOutputFilename); |
| target.eraseFromDisk(); |
| if (tmp_output.renamePathOnDisk(target, &ErrMsg)) |
| PrintAndExit(ErrMsg, 2); |
| } else |
| PrintAndExit("Post-link optimization output is not bitcode"); |
| } else { |
| PrintAndExit(ErrMsg); |
| } |
| } |
| } |
| |
| // If the user wants to generate a native executable, compile it from the |
| // bitcode file. |
| // |
| // Otherwise, create a script that will run the bitcode through the JIT. |
| if (Native) { |
| // Name of the Assembly Language output file |
| sys::Path AssemblyFile ( OutputFilename); |
| AssemblyFile.appendSuffix("s"); |
| |
| // Mark the output files for removal if we get an interrupt. |
| sys::RemoveFileOnSignal(AssemblyFile); |
| sys::RemoveFileOnSignal(sys::Path(OutputFilename)); |
| |
| // Determine the locations of the llc and gcc programs. |
| sys::Path llc = FindExecutable("llc", argv[0]); |
| if (llc.isEmpty()) |
| PrintAndExit("Failed to find llc"); |
| |
| sys::Path gcc = FindExecutable("gcc", argv[0]); |
| if (gcc.isEmpty()) |
| PrintAndExit("Failed to find gcc"); |
| |
| // Generate an assembly language file for the bitcode. |
| std::string ErrMsg; |
| if (0 != GenerateAssembly(AssemblyFile.toString(), BitcodeOutputFilename, |
| llc, ErrMsg)) |
| PrintAndExit(ErrMsg); |
| |
| if (0 != GenerateNative(OutputFilename, AssemblyFile.toString(), |
| NativeLinkItems, gcc, envp, ErrMsg)) |
| PrintAndExit(ErrMsg); |
| |
| // Remove the assembly language file. |
| AssemblyFile.eraseFromDisk(); |
| } else if (NativeCBE) { |
| sys::Path CFile (OutputFilename); |
| CFile.appendSuffix("cbe.c"); |
| |
| // Mark the output files for removal if we get an interrupt. |
| sys::RemoveFileOnSignal(CFile); |
| sys::RemoveFileOnSignal(sys::Path(OutputFilename)); |
| |
| // Determine the locations of the llc and gcc programs. |
| sys::Path llc = FindExecutable("llc", argv[0]); |
| if (llc.isEmpty()) |
| PrintAndExit("Failed to find llc"); |
| |
| sys::Path gcc = FindExecutable("gcc", argv[0]); |
| if (gcc.isEmpty()) |
| PrintAndExit("Failed to find gcc"); |
| |
| // Generate an assembly language file for the bitcode. |
| std::string ErrMsg; |
| if (0 != GenerateCFile( |
| CFile.toString(), BitcodeOutputFilename, llc, ErrMsg)) |
| PrintAndExit(ErrMsg); |
| |
| if (0 != GenerateNative(OutputFilename, CFile.toString(), |
| NativeLinkItems, gcc, envp, ErrMsg)) |
| PrintAndExit(ErrMsg); |
| |
| // Remove the assembly language file. |
| CFile.eraseFromDisk(); |
| |
| } else { |
| EmitShellScript(argv); |
| } |
| |
| // Make the script executable... |
| std::string ErrMsg; |
| if (sys::Path(OutputFilename).makeExecutableOnDisk(&ErrMsg)) |
| PrintAndExit(ErrMsg); |
| |
| // Make the bitcode file readable and directly executable in LLEE as well |
| if (sys::Path(BitcodeOutputFilename).makeExecutableOnDisk(&ErrMsg)) |
| PrintAndExit(ErrMsg); |
| |
| if (sys::Path(BitcodeOutputFilename).makeReadableOnDisk(&ErrMsg)) |
| PrintAndExit(ErrMsg); |
| } |
| } catch (const std::string& msg) { |
| PrintAndExit(msg,2); |
| } catch (...) { |
| PrintAndExit("Unexpected unknown exception occurred.", 2); |
| } |
| |
| // Graceful exit |
| return 0; |
| } |