mirror of
https://github.com/RPCS3/llvm-mirror.git
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c253fa6c45
llvm-svn: 8756
191 lines
6.6 KiB
C++
191 lines
6.6 KiB
C++
//===- ExecutionDriver.cpp - Allow execution of LLVM program --------------===//
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//
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// This file contains code used to execute the program utilizing one of the
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// various ways of running LLVM bytecode.
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//
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//===----------------------------------------------------------------------===//
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/*
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BUGPOINT NOTES:
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1. Bugpoint should not leave any files behind if the program works properly
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2. There should be an option to specify the program name, which specifies a
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unique string to put into output files. This allows operation in the
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SingleSource directory, e.g. default to the first input filename.
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*/
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#include "BugDriver.h"
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#include "Support/ToolRunner.h"
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#include "Support/CommandLine.h"
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#include "Support/Debug.h"
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#include "Support/FileUtilities.h"
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#include "Support/SystemUtils.h"
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#include <fstream>
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#include <iostream>
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namespace {
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// OutputType - Allow the user to specify the way code should be run, to test
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// for miscompilation.
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//
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enum OutputType {
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RunLLI, RunJIT, RunLLC, RunCBE
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};
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cl::opt<OutputType>
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InterpreterSel(cl::desc("Specify how LLVM code should be executed:"),
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cl::values(clEnumValN(RunLLI, "run-lli", "Execute with LLI"),
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clEnumValN(RunJIT, "run-jit", "Execute with JIT"),
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clEnumValN(RunLLC, "run-llc", "Compile with LLC"),
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clEnumValN(RunCBE, "run-cbe", "Compile with CBE"),
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0));
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cl::opt<std::string>
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InputFile("input", cl::init("/dev/null"),
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cl::desc("Filename to pipe in as stdin (default: /dev/null)"));
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}
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// Anything specified after the --args option are taken as arguments to the
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// program being debugged.
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cl::list<std::string>
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InputArgv("args", cl::Positional, cl::desc("<program arguments>..."),
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cl::ZeroOrMore);
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//===----------------------------------------------------------------------===//
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// BugDriver method implementation
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//
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/// initializeExecutionEnvironment - This method is used to set up the
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/// environment for executing LLVM programs.
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///
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bool BugDriver::initializeExecutionEnvironment() {
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std::cout << "Initializing execution environment: ";
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// FIXME: This should default to searching for the best interpreter to use on
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// this platform, which would be JIT, then LLC, then CBE, then LLI.
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// Create an instance of the AbstractInterpreter interface as specified on
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// the command line
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std::string Message;
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switch (InterpreterSel) {
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case RunLLI: Interpreter = createLLItool(getToolName(), Message); break;
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case RunLLC: Interpreter = createLLCtool(getToolName(), Message); break;
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case RunJIT: Interpreter = createJITtool(getToolName(), Message); break;
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case RunCBE: Interpreter = createCBEtool(getToolName(), Message); break;
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default:
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Message = "Sorry, this back-end is not supported by bugpoint right now!\n";
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break;
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}
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std::cerr << Message;
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// Initialize auxiliary tools for debugging
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cbe = createCBEtool(getToolName(), Message);
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if (!cbe) { std::cout << Message << "\nExiting.\n"; exit(1); }
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gcc = createGCCtool(getToolName(), Message);
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if (!gcc) { std::cout << Message << "\nExiting.\n"; exit(1); }
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// If there was an error creating the selected interpreter, quit with error.
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return Interpreter == 0;
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}
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/// executeProgram - This method runs "Program", capturing the output of the
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/// program to a file, returning the filename of the file. A recommended
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/// filename may be optionally specified.
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///
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std::string BugDriver::executeProgram(std::string OutputFile,
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std::string BytecodeFile,
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std::string SharedObject,
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AbstractInterpreter *AI) {
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assert((Interpreter||AI) && "Interpreter should have been created already!");
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bool CreatedBytecode = false;
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if (BytecodeFile.empty()) {
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// Emit the program to a bytecode file...
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BytecodeFile = getUniqueFilename("bugpoint-test-program.bc");
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if (writeProgramToFile(BytecodeFile, Program)) {
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std::cerr << ToolName << ": Error emitting bytecode to file '"
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<< BytecodeFile << "'!\n";
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exit(1);
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}
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CreatedBytecode = true;
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}
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if (OutputFile.empty()) OutputFile = "bugpoint-execution-output";
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// Check to see if this is a valid output filename...
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OutputFile = getUniqueFilename(OutputFile);
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// Actually execute the program!
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int RetVal = (AI != 0) ?
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AI->ExecuteProgram(BytecodeFile, InputArgv, InputFile, OutputFile,
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SharedObject) :
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Interpreter->ExecuteProgram(BytecodeFile, InputArgv,
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InputFile, OutputFile, SharedObject);
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// Remove the temporary bytecode file.
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if (CreatedBytecode) removeFile(BytecodeFile);
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// Return the filename we captured the output to.
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return OutputFile;
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}
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std::string BugDriver::executeProgramWithCBE(std::string OutputFile,
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std::string BytecodeFile,
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std::string SharedObject) {
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return executeProgram(OutputFile, BytecodeFile, SharedObject, cbe);
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}
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int BugDriver::compileSharedObject(const std::string &BytecodeFile,
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std::string &SharedObject) {
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assert(Interpreter && "Interpreter should have been created already!");
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std::string Message, OutputCFile;
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// Using CBE
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cbe->OutputC(BytecodeFile, OutputCFile);
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#if 0 /* This is an alternative, as yet unimplemented */
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// Using LLC
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LLC *llc = createLLCtool(Message);
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if (llc->OutputAsm(BytecodeFile, OutputFile)) {
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std::cerr << "Could not generate asm code with `llc', exiting.\n";
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exit(1);
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}
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#endif
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gcc->MakeSharedObject(OutputCFile, CFile, SharedObject);
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// Remove the intermediate C file
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removeFile(OutputCFile);
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return 0;
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}
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/// diffProgram - This method executes the specified module and diffs the output
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/// against the file specified by ReferenceOutputFile. If the output is
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/// different, true is returned.
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///
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bool BugDriver::diffProgram(const std::string &BytecodeFile,
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const std::string &SharedObject,
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bool RemoveBytecode) {
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// Execute the program, generating an output file...
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std::string Output = executeProgram("", BytecodeFile, SharedObject);
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std::string Error;
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bool FilesDifferent = false;
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if (DiffFiles(ReferenceOutputFile, Output, &Error)) {
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if (!Error.empty()) {
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std::cerr << "While diffing output: " << Error << "\n";
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exit(1);
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}
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FilesDifferent = true;
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}
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if (RemoveBytecode) removeFile(BytecodeFile);
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return FilesDifferent;
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}
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bool BugDriver::isExecutingJIT() {
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return InterpreterSel == RunJIT;
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}
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