1 //===- ExecutionDriver.cpp - Allow execution of LLVM program --------------===//
3 // This file contains code used to execute the program utilizing one of the
4 // various ways of running LLVM bytecode.
6 //===----------------------------------------------------------------------===//
11 1. Bugpoint should not leave any files behind if the program works properly
12 2. There should be an option to specify the program name, which specifies a
13 unique string to put into output files. This allows operation in the
14 SingleSource directory, e.g. default to the first input filename.
17 #include "BugDriver.h"
18 #include "SystemUtils.h"
19 #include "Support/CommandLine.h"
24 // OutputType - Allow the user to specify the way code should be run, to test
25 // for miscompilation.
28 RunLLI, RunJIT, RunLLC, RunCBE
31 InterpreterSel(cl::desc("Specify how LLVM code should be executed:"),
32 cl::values(clEnumValN(RunLLI, "run-lli", "Execute with LLI"),
33 clEnumValN(RunJIT, "run-jit", "Execute with JIT"),
34 clEnumValN(RunLLC, "run-llc", "Compile with LLC"),
35 clEnumValN(RunCBE, "run-cbe", "Compile with CBE"),
39 InputFile("input", cl::init("/dev/null"),
40 cl::desc("Filename to pipe in as stdin (default: /dev/null)"));
42 enum FileType { AsmFile, CFile };
45 /// AbstractInterpreter Class - Subclasses of this class are used to execute
46 /// LLVM bytecode in a variety of ways. This abstract interface hides this
47 /// complexity behind a simple interface.
49 struct AbstractInterpreter {
51 virtual ~AbstractInterpreter() {}
53 /// ExecuteProgram - Run the specified bytecode file, emitting output to the
54 /// specified filename. This returns the exit code of the program.
56 virtual int ExecuteProgram(const std::string &Bytecode,
57 const std::string &OutputFile,
58 const std::string &SharedLib = "") = 0;
62 //===----------------------------------------------------------------------===//
63 // LLI Implementation of AbstractIntepreter interface
65 class LLI : public AbstractInterpreter {
66 std::string LLIPath; // The path to the LLI executable
68 LLI(const std::string &Path) : LLIPath(Path) { }
70 // LLI create method - Try to find the LLI executable
71 static LLI *create(BugDriver *BD, std::string &Message) {
72 std::string LLIPath = FindExecutable("lli", BD->getToolName());
73 if (!LLIPath.empty()) {
74 Message = "Found lli: " + LLIPath + "\n";
75 return new LLI(LLIPath);
78 Message = "Cannot find `lli' in bugpoint executable directory or PATH!\n";
81 virtual int ExecuteProgram(const std::string &Bytecode,
82 const std::string &OutputFile,
83 const std::string &SharedLib = "");
86 int LLI::ExecuteProgram(const std::string &Bytecode,
87 const std::string &OutputFile,
88 const std::string &SharedLib) {
89 if (!SharedLib.empty()) {
90 std::cerr << "LLI currently does not support loading shared libraries.\n"
95 const char *Args[] = {
97 "-abort-on-exception",
99 "-force-interpreter=true",
104 return RunProgramWithTimeout(LLIPath, Args,
105 InputFile, OutputFile, OutputFile);
108 //===----------------------------------------------------------------------===//
109 // GCC Implementation of AbstractIntepreter interface
111 // This is not a *real* AbstractInterpreter as it does not accept bytecode
112 // files, but only input acceptable to GCC, i.e. C, C++, and assembly files
115 std::string GCCPath; // The path to the gcc executable
117 GCC(const std::string &gccPath) : GCCPath(gccPath) { }
120 // GCC create method - Try to find the `gcc' executable
121 static GCC *create(BugDriver *BD, std::string &Message) {
122 std::string GCCPath = FindExecutable("gcc", BD->getToolName());
123 if (GCCPath.empty()) {
124 Message = "Cannot find `gcc' in bugpoint executable directory or PATH!\n";
128 Message = "Found gcc: " + GCCPath + "\n";
129 return new GCC(GCCPath);
132 virtual int ExecuteProgram(const std::string &ProgramFile,
134 const std::string &OutputFile,
135 const std::string &SharedLib = "");
137 int MakeSharedObject(const std::string &InputFile,
139 std::string &OutputFile);
141 void ProcessFailure(const char **Args);
144 int GCC::ExecuteProgram(const std::string &ProgramFile,
146 const std::string &OutputFile,
147 const std::string &SharedLib) {
148 std::string OutputBinary = "bugpoint.gcc.exe";
149 const char **GCCArgs;
151 const char *ArgsWithoutSO[] = {
153 "-x", (fileType == AsmFile) ? "assembler" : "c",
154 ProgramFile.c_str(), // Specify the input filename...
155 "-o", OutputBinary.c_str(), // Output to the right filename...
156 "-lm", // Hard-code the math library...
157 "-O2", // Optimize the program a bit...
160 const char *ArgsWithSO[] = {
162 "-x", (fileType == AsmFile) ? "assembler" : "c",
163 ProgramFile.c_str(), // Specify the input filename...
164 SharedLib.c_str(), // Specify the shared library to link in...
165 "-o", OutputBinary.c_str(), // Output to the right filename...
166 "-lm", // Hard-code the math library...
167 "-O2", // Optimize the program a bit...
171 GCCArgs = (SharedLib.empty()) ? ArgsWithoutSO : ArgsWithSO;
172 std::cout << "<gcc>";
173 if (RunProgramWithTimeout(GCCPath, GCCArgs, "/dev/null", "/dev/null",
175 ProcessFailure(GCCArgs);
179 const char *ProgramArgs[] = {
180 OutputBinary.c_str(),
184 std::cout << "<program>";
186 // Now that we have a binary, run it!
187 int ProgramResult = RunProgramWithTimeout(OutputBinary, ProgramArgs,
188 InputFile, OutputFile, OutputFile);
190 removeFile(OutputBinary);
191 return ProgramResult;
194 int GCC::MakeSharedObject(const std::string &InputFile,
196 std::string &OutputFile) {
197 OutputFile = "./bugpoint.so";
198 // Compile the C/asm file into a shared object
199 const char* GCCArgs[] = {
201 "-x", (fileType == AsmFile) ? "assembler" : "c",
202 InputFile.c_str(), // Specify the input filename...
203 #if defined(sparc) || defined(__sparc__) || defined(__sparcv9)
204 "-G", // Compile a shared library, `-G' for Sparc
206 "-shared", // `-shared' for Linux/X86, maybe others
208 "-o", OutputFile.c_str(), // Output to the right filename...
209 "-O2", // Optimize the program a bit...
213 std::cout << "<gcc>";
214 if(RunProgramWithTimeout(GCCPath, GCCArgs, "/dev/null", "/dev/null",
216 ProcessFailure(GCCArgs);
222 void GCC::ProcessFailure(const char** GCCArgs) {
223 std::cerr << "\n*** bugpoint error: invocation of the C compiler failed!\n";
224 for (const char **Arg = GCCArgs; *Arg; ++Arg)
225 std::cerr << " " << *Arg;
228 // Rerun the compiler, capturing any error messages to print them.
229 std::string ErrorFilename = getUniqueFilename("bugpoint.gcc.errors");
230 RunProgramWithTimeout(GCCPath, GCCArgs, "/dev/null", ErrorFilename.c_str(),
231 ErrorFilename.c_str());
233 // Print out the error messages generated by GCC if possible...
234 std::ifstream ErrorFile(ErrorFilename.c_str());
236 std::copy(std::istreambuf_iterator<char>(ErrorFile),
237 std::istreambuf_iterator<char>(),
238 std::ostreambuf_iterator<char>(std::cerr));
243 removeFile(ErrorFilename);
246 //===----------------------------------------------------------------------===//
247 // LLC Implementation of AbstractIntepreter interface
249 class LLC : public AbstractInterpreter {
250 std::string LLCPath; // The path to the LLC executable
253 LLC(const std::string &llcPath, GCC *Gcc)
254 : LLCPath(llcPath), gcc(Gcc) { }
255 ~LLC() { delete gcc; }
257 // LLC create method - Try to find the LLC executable
258 static LLC *create(BugDriver *BD, std::string &Message) {
259 std::string LLCPath = FindExecutable("llc", BD->getToolName());
260 if (LLCPath.empty()) {
261 Message = "Cannot find `llc' in bugpoint executable directory or PATH!\n";
265 Message = "Found llc: " + LLCPath + "\n";
266 GCC *gcc = GCC::create(BD, Message);
268 std::cerr << Message << "\n";
271 return new LLC(LLCPath, gcc);
274 virtual int ExecuteProgram(const std::string &Bytecode,
275 const std::string &OutputFile,
276 const std::string &SharedLib = "");
278 int OutputAsm(const std::string &Bytecode,
279 std::string &OutputAsmFile);
283 int LLC::OutputAsm(const std::string &Bytecode,
284 std::string &OutputAsmFile) {
285 OutputAsmFile = "bugpoint.llc.s";
286 const char *LLCArgs[] = {
288 "-o", OutputAsmFile.c_str(), // Output to the Asm file
289 "-f", // Overwrite as necessary...
290 Bytecode.c_str(), // This is the input bytecode
294 std::cout << "<llc>";
295 if (RunProgramWithTimeout(LLCPath, LLCArgs, "/dev/null", "/dev/null",
297 // If LLC failed on the bytecode, print error...
298 std::cerr << "bugpoint error: `llc' failed!\n";
299 removeFile(OutputAsmFile);
306 int LLC::ExecuteProgram(const std::string &Bytecode,
307 const std::string &OutputFile,
308 const std::string &SharedLib) {
310 std::string OutputAsmFile;
311 if (OutputAsm(Bytecode, OutputAsmFile)) {
312 std::cerr << "Could not generate asm code with `llc', exiting.\n";
316 // Assuming LLC worked, compile the result with GCC and run it.
317 int Result = gcc->ExecuteProgram(OutputAsmFile,AsmFile,OutputFile,SharedLib);
318 removeFile(OutputAsmFile);
323 //===----------------------------------------------------------------------===//
324 // JIT Implementation of AbstractIntepreter interface
326 class JIT : public AbstractInterpreter {
327 std::string LLIPath; // The path to the LLI executable
329 JIT(const std::string &Path) : LLIPath(Path) { }
331 // JIT create method - Try to find the LLI executable
332 static JIT *create(BugDriver *BD, std::string &Message) {
333 std::string LLIPath = FindExecutable("lli", BD->getToolName());
334 if (!LLIPath.empty()) {
335 Message = "Found lli: " + LLIPath + "\n";
336 return new JIT(LLIPath);
339 Message = "Cannot find `lli' in bugpoint executable directory or PATH!\n";
342 virtual int ExecuteProgram(const std::string &Bytecode,
343 const std::string &OutputFile,
344 const std::string &SharedLib = "");
347 int JIT::ExecuteProgram(const std::string &Bytecode,
348 const std::string &OutputFile,
349 const std::string &SharedLib) {
350 if (SharedLib.empty()) {
351 const char* Args[] = {
354 "-force-interpreter=false",
358 return RunProgramWithTimeout(LLIPath, Args,
359 InputFile, OutputFile, OutputFile);
361 const char* Args[] = {
362 LLIPath.c_str(), "-quiet", "-force-interpreter=false",
363 "-load", SharedLib.c_str(),
367 return RunProgramWithTimeout(LLIPath, Args,
368 InputFile, OutputFile, OutputFile);
372 //===----------------------------------------------------------------------===//
373 // CBE Implementation of AbstractIntepreter interface
375 class CBE : public AbstractInterpreter {
376 std::string DISPath; // The path to the LLVM 'dis' executable
379 CBE(const std::string &disPath, GCC *Gcc) : DISPath(disPath), gcc(Gcc) { }
380 ~CBE() { delete gcc; }
382 // CBE create method - Try to find the 'dis' executable
383 static CBE *create(BugDriver *BD, std::string &Message) {
384 std::string DISPath = FindExecutable("dis", BD->getToolName());
385 if (DISPath.empty()) {
386 Message = "Cannot find `dis' in bugpoint executable directory or PATH!\n";
390 Message = "Found dis: " + DISPath + "\n";
392 GCC *gcc = GCC::create(BD, Message);
394 std::cerr << Message << "\n";
397 return new CBE(DISPath, gcc);
400 virtual int ExecuteProgram(const std::string &Bytecode,
401 const std::string &OutputFile,
402 const std::string &SharedLib = "");
404 // Sometimes we just want to go half-way and only generate the C file,
405 // not necessarily compile it with GCC and run the program
406 virtual int OutputC(const std::string &Bytecode,
407 std::string &OutputCFile);
411 int CBE::OutputC(const std::string &Bytecode,
412 std::string &OutputCFile) {
413 OutputCFile = "bugpoint.cbe.c";
414 const char *DisArgs[] = {
416 "-o", OutputCFile.c_str(), // Output to the C file
418 "-f", // Overwrite as necessary...
419 Bytecode.c_str(), // This is the input bytecode
423 std::cout << "<cbe>";
424 if (RunProgramWithTimeout(DISPath, DisArgs, "/dev/null", "/dev/null",
426 // If dis failed on the bytecode, print error...
427 std::cerr << "bugpoint error: `dis -c' failed!\n";
435 int CBE::ExecuteProgram(const std::string &Bytecode,
436 const std::string &OutputFile,
437 const std::string &SharedLib) {
438 std::string OutputCFile;
439 if (OutputC(Bytecode, OutputCFile)) {
440 std::cerr << "Could not generate C code with `dis', exiting.\n";
444 int Result = gcc->ExecuteProgram(OutputCFile, CFile, OutputFile, SharedLib);
445 removeFile(OutputCFile);
451 //===----------------------------------------------------------------------===//
452 // BugDriver method implementation
455 /// initializeExecutionEnvironment - This method is used to set up the
456 /// environment for executing LLVM programs.
458 bool BugDriver::initializeExecutionEnvironment() {
459 std::cout << "Initializing execution environment: ";
461 // FIXME: This should default to searching for the best interpreter to use on
462 // this platform, which would be JIT, then LLC, then CBE, then LLI.
464 // Create an instance of the AbstractInterpreter interface as specified on the
467 switch (InterpreterSel) {
468 case RunLLI: Interpreter = LLI::create(this, Message); break;
469 case RunLLC: Interpreter = LLC::create(this, Message); break;
470 case RunJIT: Interpreter = JIT::create(this, Message); break;
471 case RunCBE: Interpreter = CBE::create(this, Message); break;
473 Message = " Sorry, this back-end is not supported by bugpoint right now!\n";
477 std::cout << Message;
479 // Initialize auxiliary tools for debugging
480 cbe = CBE::create(this, Message);
481 if (!cbe) { std::cout << Message << "\nExiting.\n"; exit(1); }
482 gcc = GCC::create(this, Message);
483 if (!gcc) { std::cout << Message << "\nExiting.\n"; exit(1); }
485 // If there was an error creating the selected interpreter, quit with error.
486 return Interpreter == 0;
490 /// executeProgram - This method runs "Program", capturing the output of the
491 /// program to a file, returning the filename of the file. A recommended
492 /// filename may be optionally specified.
494 std::string BugDriver::executeProgram(std::string OutputFile,
495 std::string BytecodeFile,
496 std::string SharedObject,
497 AbstractInterpreter *AI) {
498 assert((Interpreter || AI) &&"Interpreter should have been created already!");
499 bool CreatedBytecode = false;
500 if (BytecodeFile.empty()) {
501 // Emit the program to a bytecode file...
502 BytecodeFile = getUniqueFilename("bugpoint-test-program.bc");
504 if (writeProgramToFile(BytecodeFile, Program)) {
505 std::cerr << ToolName << ": Error emitting bytecode to file '"
506 << BytecodeFile << "'!\n";
509 CreatedBytecode = true;
512 if (OutputFile.empty()) OutputFile = "bugpoint-execution-output";
514 // Check to see if this is a valid output filename...
515 OutputFile = getUniqueFilename(OutputFile);
517 // Actually execute the program!
518 int RetVal = (AI != 0) ?
519 AI->ExecuteProgram(BytecodeFile, OutputFile, SharedObject) :
520 Interpreter->ExecuteProgram(BytecodeFile, OutputFile, SharedObject);
522 // Remove the temporary bytecode file.
523 if (CreatedBytecode) removeFile(BytecodeFile);
525 // Return the filename we captured the output to.
529 std::string BugDriver::executeProgramWithCBE(std::string OutputFile,
530 std::string BytecodeFile,
531 std::string SharedObject) {
532 return executeProgram(OutputFile, BytecodeFile, SharedObject, cbe);
535 int BugDriver::compileSharedObject(const std::string &BytecodeFile,
536 std::string &SharedObject) {
537 assert(Interpreter && "Interpreter should have been created already!");
538 std::string Message, OutputCFile;
541 cbe->OutputC(BytecodeFile, OutputCFile);
543 #if 0 /* This is an alternative, as yet unimplemented */
545 LLC *llc = LLC::create(this, Message);
546 if (llc->OutputAsm(BytecodeFile, OutputFile)) {
547 std::cerr << "Could not generate asm code with `llc', exiting.\n";
552 gcc->MakeSharedObject(OutputCFile, CFile, SharedObject);
554 // Remove the intermediate C file
555 removeFile(OutputCFile);
561 /// diffProgram - This method executes the specified module and diffs the output
562 /// against the file specified by ReferenceOutputFile. If the output is
563 /// different, true is returned.
565 bool BugDriver::diffProgram(const std::string &BytecodeFile,
566 const std::string &SharedObject,
567 bool RemoveBytecode) {
568 // Execute the program, generating an output file...
569 std::string Output = executeProgram("", BytecodeFile, SharedObject);
571 std::ifstream ReferenceFile(ReferenceOutputFile.c_str());
572 if (!ReferenceFile) {
573 std::cerr << "Couldn't open reference output file '"
574 << ReferenceOutputFile << "'\n";
578 std::ifstream OutputFile(Output.c_str());
580 std::cerr << "Couldn't open output file: " << Output << "'!\n";
584 bool FilesDifferent = false;
586 // Compare the two files...
589 C1 = ReferenceFile.get();
590 C2 = OutputFile.get();
591 if (C1 != C2) { FilesDifferent = true; break; }
595 if (RemoveBytecode) removeFile(BytecodeFile);
596 return FilesDifferent;