mirror of
https://github.com/RPCSX/llvm.git
synced 2024-11-30 23:20:54 +00:00
36538ffe93
Avoids unnecessary copies. All changes audited & pass tests with asan. No functional change intended. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272190 91177308-0d34-0410-b5e6-96231b3b80d8
485 lines
18 KiB
C++
485 lines
18 KiB
C++
//===- ExecutionDriver.cpp - Allow execution of LLVM program --------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file contains code used to execute the program utilizing one of the
|
|
// various ways of running LLVM bitcode.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "BugDriver.h"
|
|
#include "ToolRunner.h"
|
|
#include "llvm/Support/CommandLine.h"
|
|
#include "llvm/Support/Debug.h"
|
|
#include "llvm/Support/FileUtilities.h"
|
|
#include "llvm/Support/Program.h"
|
|
#include "llvm/Support/SystemUtils.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
#include <fstream>
|
|
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
// OutputType - Allow the user to specify the way code should be run, to test
|
|
// for miscompilation.
|
|
//
|
|
enum OutputType {
|
|
AutoPick, RunLLI, RunJIT, RunLLC, RunLLCIA, LLC_Safe, CompileCustom, Custom
|
|
};
|
|
|
|
cl::opt<double>
|
|
AbsTolerance("abs-tolerance", cl::desc("Absolute error tolerated"),
|
|
cl::init(0.0));
|
|
cl::opt<double>
|
|
RelTolerance("rel-tolerance", cl::desc("Relative error tolerated"),
|
|
cl::init(0.0));
|
|
|
|
cl::opt<OutputType>
|
|
InterpreterSel(cl::desc("Specify the \"test\" i.e. suspect back-end:"),
|
|
cl::values(clEnumValN(AutoPick, "auto", "Use best guess"),
|
|
clEnumValN(RunLLI, "run-int",
|
|
"Execute with the interpreter"),
|
|
clEnumValN(RunJIT, "run-jit", "Execute with JIT"),
|
|
clEnumValN(RunLLC, "run-llc", "Compile with LLC"),
|
|
clEnumValN(RunLLCIA, "run-llc-ia",
|
|
"Compile with LLC with integrated assembler"),
|
|
clEnumValN(LLC_Safe, "llc-safe", "Use LLC for all"),
|
|
clEnumValN(CompileCustom, "compile-custom",
|
|
"Use -compile-command to define a command to "
|
|
"compile the bitcode. Useful to avoid linking."),
|
|
clEnumValN(Custom, "run-custom",
|
|
"Use -exec-command to define a command to execute "
|
|
"the bitcode. Useful for cross-compilation."),
|
|
clEnumValEnd),
|
|
cl::init(AutoPick));
|
|
|
|
cl::opt<OutputType>
|
|
SafeInterpreterSel(cl::desc("Specify \"safe\" i.e. known-good backend:"),
|
|
cl::values(clEnumValN(AutoPick, "safe-auto", "Use best guess"),
|
|
clEnumValN(RunLLC, "safe-run-llc", "Compile with LLC"),
|
|
clEnumValN(Custom, "safe-run-custom",
|
|
"Use -exec-command to define a command to execute "
|
|
"the bitcode. Useful for cross-compilation."),
|
|
clEnumValEnd),
|
|
cl::init(AutoPick));
|
|
|
|
cl::opt<std::string>
|
|
SafeInterpreterPath("safe-path",
|
|
cl::desc("Specify the path to the \"safe\" backend program"),
|
|
cl::init(""));
|
|
|
|
cl::opt<bool>
|
|
AppendProgramExitCode("append-exit-code",
|
|
cl::desc("Append the exit code to the output so it gets diff'd too"),
|
|
cl::init(false));
|
|
|
|
cl::opt<std::string>
|
|
InputFile("input", cl::init("/dev/null"),
|
|
cl::desc("Filename to pipe in as stdin (default: /dev/null)"));
|
|
|
|
cl::list<std::string>
|
|
AdditionalSOs("additional-so",
|
|
cl::desc("Additional shared objects to load "
|
|
"into executing programs"));
|
|
|
|
cl::list<std::string>
|
|
AdditionalLinkerArgs("Xlinker",
|
|
cl::desc("Additional arguments to pass to the linker"));
|
|
|
|
cl::opt<std::string>
|
|
CustomCompileCommand("compile-command", cl::init("llc"),
|
|
cl::desc("Command to compile the bitcode (use with -compile-custom) "
|
|
"(default: llc)"));
|
|
|
|
cl::opt<std::string>
|
|
CustomExecCommand("exec-command", cl::init("simulate"),
|
|
cl::desc("Command to execute the bitcode (use with -run-custom) "
|
|
"(default: simulate)"));
|
|
}
|
|
|
|
namespace llvm {
|
|
// Anything specified after the --args option are taken as arguments to the
|
|
// program being debugged.
|
|
cl::list<std::string>
|
|
InputArgv("args", cl::Positional, cl::desc("<program arguments>..."),
|
|
cl::ZeroOrMore, cl::PositionalEatsArgs);
|
|
|
|
cl::opt<std::string>
|
|
OutputPrefix("output-prefix", cl::init("bugpoint"),
|
|
cl::desc("Prefix to use for outputs (default: 'bugpoint')"));
|
|
}
|
|
|
|
namespace {
|
|
cl::list<std::string>
|
|
ToolArgv("tool-args", cl::Positional, cl::desc("<tool arguments>..."),
|
|
cl::ZeroOrMore, cl::PositionalEatsArgs);
|
|
|
|
cl::list<std::string>
|
|
SafeToolArgv("safe-tool-args", cl::Positional,
|
|
cl::desc("<safe-tool arguments>..."),
|
|
cl::ZeroOrMore, cl::PositionalEatsArgs);
|
|
|
|
cl::opt<std::string>
|
|
CCBinary("gcc", cl::init(""), cl::desc("The gcc binary to use."));
|
|
|
|
cl::list<std::string>
|
|
CCToolArgv("gcc-tool-args", cl::Positional,
|
|
cl::desc("<gcc-tool arguments>..."),
|
|
cl::ZeroOrMore, cl::PositionalEatsArgs);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// BugDriver method implementation
|
|
//
|
|
|
|
/// initializeExecutionEnvironment - This method is used to set up the
|
|
/// environment for executing LLVM programs.
|
|
///
|
|
bool BugDriver::initializeExecutionEnvironment() {
|
|
outs() << "Initializing execution environment: ";
|
|
|
|
// Create an instance of the AbstractInterpreter interface as specified on
|
|
// the command line
|
|
SafeInterpreter = nullptr;
|
|
std::string Message;
|
|
|
|
if (CCBinary.empty()) {
|
|
if (sys::findProgramByName("clang"))
|
|
CCBinary = "clang";
|
|
else
|
|
CCBinary = "gcc";
|
|
}
|
|
|
|
switch (InterpreterSel) {
|
|
case AutoPick:
|
|
if (!Interpreter) {
|
|
InterpreterSel = RunJIT;
|
|
Interpreter = AbstractInterpreter::createJIT(getToolName(), Message,
|
|
&ToolArgv);
|
|
}
|
|
if (!Interpreter) {
|
|
InterpreterSel = RunLLC;
|
|
Interpreter = AbstractInterpreter::createLLC(getToolName(), Message,
|
|
CCBinary, &ToolArgv,
|
|
&CCToolArgv);
|
|
}
|
|
if (!Interpreter) {
|
|
InterpreterSel = RunLLI;
|
|
Interpreter = AbstractInterpreter::createLLI(getToolName(), Message,
|
|
&ToolArgv);
|
|
}
|
|
if (!Interpreter) {
|
|
InterpreterSel = AutoPick;
|
|
Message = "Sorry, I can't automatically select an interpreter!\n";
|
|
}
|
|
break;
|
|
case RunLLI:
|
|
Interpreter = AbstractInterpreter::createLLI(getToolName(), Message,
|
|
&ToolArgv);
|
|
break;
|
|
case RunLLC:
|
|
case RunLLCIA:
|
|
case LLC_Safe:
|
|
Interpreter = AbstractInterpreter::createLLC(getToolName(), Message,
|
|
CCBinary, &ToolArgv,
|
|
&CCToolArgv,
|
|
InterpreterSel == RunLLCIA);
|
|
break;
|
|
case RunJIT:
|
|
Interpreter = AbstractInterpreter::createJIT(getToolName(), Message,
|
|
&ToolArgv);
|
|
break;
|
|
case CompileCustom:
|
|
Interpreter =
|
|
AbstractInterpreter::createCustomCompiler(Message, CustomCompileCommand);
|
|
break;
|
|
case Custom:
|
|
Interpreter =
|
|
AbstractInterpreter::createCustomExecutor(Message, CustomExecCommand);
|
|
break;
|
|
}
|
|
if (!Interpreter)
|
|
errs() << Message;
|
|
else // Display informational messages on stdout instead of stderr
|
|
outs() << Message;
|
|
|
|
std::string Path = SafeInterpreterPath;
|
|
if (Path.empty())
|
|
Path = getToolName();
|
|
std::vector<std::string> SafeToolArgs = SafeToolArgv;
|
|
switch (SafeInterpreterSel) {
|
|
case AutoPick:
|
|
// In "llc-safe" mode, default to using LLC as the "safe" backend.
|
|
if (!SafeInterpreter &&
|
|
InterpreterSel == LLC_Safe) {
|
|
SafeInterpreterSel = RunLLC;
|
|
SafeToolArgs.push_back("--relocation-model=pic");
|
|
SafeInterpreter = AbstractInterpreter::createLLC(Path.c_str(), Message,
|
|
CCBinary,
|
|
&SafeToolArgs,
|
|
&CCToolArgv);
|
|
}
|
|
|
|
if (!SafeInterpreter &&
|
|
InterpreterSel != RunLLC &&
|
|
InterpreterSel != RunJIT) {
|
|
SafeInterpreterSel = RunLLC;
|
|
SafeToolArgs.push_back("--relocation-model=pic");
|
|
SafeInterpreter = AbstractInterpreter::createLLC(Path.c_str(), Message,
|
|
CCBinary,
|
|
&SafeToolArgs,
|
|
&CCToolArgv);
|
|
}
|
|
if (!SafeInterpreter) {
|
|
SafeInterpreterSel = AutoPick;
|
|
Message = "Sorry, I can't automatically select a safe interpreter!\n";
|
|
}
|
|
break;
|
|
case RunLLC:
|
|
case RunLLCIA:
|
|
SafeToolArgs.push_back("--relocation-model=pic");
|
|
SafeInterpreter = AbstractInterpreter::createLLC(Path.c_str(), Message,
|
|
CCBinary, &SafeToolArgs,
|
|
&CCToolArgv,
|
|
SafeInterpreterSel == RunLLCIA);
|
|
break;
|
|
case Custom:
|
|
SafeInterpreter =
|
|
AbstractInterpreter::createCustomExecutor(Message, CustomExecCommand);
|
|
break;
|
|
default:
|
|
Message = "Sorry, this back-end is not supported by bugpoint as the "
|
|
"\"safe\" backend right now!\n";
|
|
break;
|
|
}
|
|
if (!SafeInterpreter) { outs() << Message << "\nExiting.\n"; exit(1); }
|
|
|
|
cc = CC::create(Message, CCBinary, &CCToolArgv);
|
|
if (!cc) { outs() << Message << "\nExiting.\n"; exit(1); }
|
|
|
|
// If there was an error creating the selected interpreter, quit with error.
|
|
return Interpreter == nullptr;
|
|
}
|
|
|
|
/// compileProgram - Try to compile the specified module, returning false and
|
|
/// setting Error if an error occurs. This is used for code generation
|
|
/// crash testing.
|
|
///
|
|
void BugDriver::compileProgram(Module *M, std::string *Error) const {
|
|
// Emit the program to a bitcode file...
|
|
SmallString<128> BitcodeFile;
|
|
int BitcodeFD;
|
|
std::error_code EC = sys::fs::createUniqueFile(
|
|
OutputPrefix + "-test-program-%%%%%%%.bc", BitcodeFD, BitcodeFile);
|
|
if (EC) {
|
|
errs() << ToolName << ": Error making unique filename: " << EC.message()
|
|
<< "\n";
|
|
exit(1);
|
|
}
|
|
if (writeProgramToFile(BitcodeFile.str(), BitcodeFD, M)) {
|
|
errs() << ToolName << ": Error emitting bitcode to file '" << BitcodeFile
|
|
<< "'!\n";
|
|
exit(1);
|
|
}
|
|
|
|
// Remove the temporary bitcode file when we are done.
|
|
FileRemover BitcodeFileRemover(BitcodeFile.str(), !SaveTemps);
|
|
|
|
// Actually compile the program!
|
|
Interpreter->compileProgram(BitcodeFile.str(), Error, Timeout, MemoryLimit);
|
|
}
|
|
|
|
|
|
/// executeProgram - This method runs "Program", capturing the output of the
|
|
/// program to a file, returning the filename of the file. A recommended
|
|
/// filename may be optionally specified.
|
|
///
|
|
std::string BugDriver::executeProgram(const Module *Program,
|
|
std::string OutputFile,
|
|
std::string BitcodeFile,
|
|
const std::string &SharedObj,
|
|
AbstractInterpreter *AI,
|
|
std::string *Error) const {
|
|
if (!AI) AI = Interpreter;
|
|
assert(AI && "Interpreter should have been created already!");
|
|
bool CreatedBitcode = false;
|
|
if (BitcodeFile.empty()) {
|
|
// Emit the program to a bitcode file...
|
|
SmallString<128> UniqueFilename;
|
|
int UniqueFD;
|
|
std::error_code EC = sys::fs::createUniqueFile(
|
|
OutputPrefix + "-test-program-%%%%%%%.bc", UniqueFD, UniqueFilename);
|
|
if (EC) {
|
|
errs() << ToolName << ": Error making unique filename: "
|
|
<< EC.message() << "!\n";
|
|
exit(1);
|
|
}
|
|
BitcodeFile = UniqueFilename.str();
|
|
|
|
if (writeProgramToFile(BitcodeFile, UniqueFD, Program)) {
|
|
errs() << ToolName << ": Error emitting bitcode to file '"
|
|
<< BitcodeFile << "'!\n";
|
|
exit(1);
|
|
}
|
|
CreatedBitcode = true;
|
|
}
|
|
|
|
// Remove the temporary bitcode file when we are done.
|
|
std::string BitcodePath(BitcodeFile);
|
|
FileRemover BitcodeFileRemover(BitcodePath,
|
|
CreatedBitcode && !SaveTemps);
|
|
|
|
if (OutputFile.empty()) OutputFile = OutputPrefix + "-execution-output-%%%%%%%";
|
|
|
|
// Check to see if this is a valid output filename...
|
|
SmallString<128> UniqueFile;
|
|
std::error_code EC = sys::fs::createUniqueFile(OutputFile, UniqueFile);
|
|
if (EC) {
|
|
errs() << ToolName << ": Error making unique filename: "
|
|
<< EC.message() << "\n";
|
|
exit(1);
|
|
}
|
|
OutputFile = UniqueFile.str();
|
|
|
|
// Figure out which shared objects to run, if any.
|
|
std::vector<std::string> SharedObjs(AdditionalSOs);
|
|
if (!SharedObj.empty())
|
|
SharedObjs.push_back(SharedObj);
|
|
|
|
int RetVal = AI->ExecuteProgram(BitcodeFile, InputArgv, InputFile, OutputFile,
|
|
Error, AdditionalLinkerArgs, SharedObjs,
|
|
Timeout, MemoryLimit);
|
|
if (!Error->empty())
|
|
return OutputFile;
|
|
|
|
if (RetVal == -1) {
|
|
errs() << "<timeout>";
|
|
static bool FirstTimeout = true;
|
|
if (FirstTimeout) {
|
|
outs() << "\n"
|
|
"*** Program execution timed out! This mechanism is designed to handle\n"
|
|
" programs stuck in infinite loops gracefully. The -timeout option\n"
|
|
" can be used to change the timeout threshold or disable it completely\n"
|
|
" (with -timeout=0). This message is only displayed once.\n";
|
|
FirstTimeout = false;
|
|
}
|
|
}
|
|
|
|
if (AppendProgramExitCode) {
|
|
std::ofstream outFile(OutputFile.c_str(), std::ios_base::app);
|
|
outFile << "exit " << RetVal << '\n';
|
|
outFile.close();
|
|
}
|
|
|
|
// Return the filename we captured the output to.
|
|
return OutputFile;
|
|
}
|
|
|
|
/// executeProgramSafely - Used to create reference output with the "safe"
|
|
/// backend, if reference output is not provided.
|
|
///
|
|
std::string BugDriver::executeProgramSafely(const Module *Program,
|
|
const std::string &OutputFile,
|
|
std::string *Error) const {
|
|
return executeProgram(Program, OutputFile, "", "", SafeInterpreter, Error);
|
|
}
|
|
|
|
std::string BugDriver::compileSharedObject(const std::string &BitcodeFile,
|
|
std::string &Error) {
|
|
assert(Interpreter && "Interpreter should have been created already!");
|
|
std::string OutputFile;
|
|
|
|
// Using the known-good backend.
|
|
CC::FileType FT = SafeInterpreter->OutputCode(BitcodeFile, OutputFile,
|
|
Error);
|
|
if (!Error.empty())
|
|
return "";
|
|
|
|
std::string SharedObjectFile;
|
|
bool Failure = cc->MakeSharedObject(OutputFile, FT, SharedObjectFile,
|
|
AdditionalLinkerArgs, Error);
|
|
if (!Error.empty())
|
|
return "";
|
|
if (Failure)
|
|
exit(1);
|
|
|
|
// Remove the intermediate C file
|
|
sys::fs::remove(OutputFile);
|
|
|
|
return SharedObjectFile;
|
|
}
|
|
|
|
/// createReferenceFile - calls compileProgram and then records the output
|
|
/// into ReferenceOutputFile. Returns true if reference file created, false
|
|
/// otherwise. Note: initializeExecutionEnvironment should be called BEFORE
|
|
/// this function.
|
|
///
|
|
bool BugDriver::createReferenceFile(Module *M, const std::string &Filename) {
|
|
std::string Error;
|
|
compileProgram(Program, &Error);
|
|
if (!Error.empty())
|
|
return false;
|
|
|
|
ReferenceOutputFile = executeProgramSafely(Program, Filename, &Error);
|
|
if (!Error.empty()) {
|
|
errs() << Error;
|
|
if (Interpreter != SafeInterpreter) {
|
|
errs() << "*** There is a bug running the \"safe\" backend. Either"
|
|
<< " debug it (for example with the -run-jit bugpoint option,"
|
|
<< " if JIT is being used as the \"safe\" backend), or fix the"
|
|
<< " error some other way.\n";
|
|
}
|
|
return false;
|
|
}
|
|
outs() << "\nReference output is: " << ReferenceOutputFile << "\n\n";
|
|
return true;
|
|
}
|
|
|
|
/// diffProgram - This method executes the specified module and diffs the
|
|
/// output against the file specified by ReferenceOutputFile. If the output
|
|
/// is different, 1 is returned. If there is a problem with the code
|
|
/// generator (e.g., llc crashes), this will set ErrMsg.
|
|
///
|
|
bool BugDriver::diffProgram(const Module *Program,
|
|
const std::string &BitcodeFile,
|
|
const std::string &SharedObject,
|
|
bool RemoveBitcode,
|
|
std::string *ErrMsg) const {
|
|
// Execute the program, generating an output file...
|
|
std::string Output(
|
|
executeProgram(Program, "", BitcodeFile, SharedObject, nullptr, ErrMsg));
|
|
if (!ErrMsg->empty())
|
|
return false;
|
|
|
|
std::string Error;
|
|
bool FilesDifferent = false;
|
|
if (int Diff = DiffFilesWithTolerance(ReferenceOutputFile,
|
|
Output,
|
|
AbsTolerance, RelTolerance, &Error)) {
|
|
if (Diff == 2) {
|
|
errs() << "While diffing output: " << Error << '\n';
|
|
exit(1);
|
|
}
|
|
FilesDifferent = true;
|
|
}
|
|
else {
|
|
// Remove the generated output if there are no differences.
|
|
sys::fs::remove(Output);
|
|
}
|
|
|
|
// Remove the bitcode file if we are supposed to.
|
|
if (RemoveBitcode)
|
|
sys::fs::remove(BitcodeFile);
|
|
return FilesDifferent;
|
|
}
|
|
|
|
bool BugDriver::isExecutingJIT() {
|
|
return InterpreterSel == RunJIT;
|
|
}
|
|
|