2002-11-20 23:28:10 +01:00
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//===- OptimizerDriver.cpp - Allow BugPoint to run passes safely ----------===//
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2005-04-22 02:00:37 +02:00
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//
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2003-10-20 19:47:21 +02:00
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// The LLVM Compiler Infrastructure
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//
|
2007-12-29 21:44:31 +01:00
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
|
2005-04-22 02:00:37 +02:00
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//
|
2003-10-20 19:47:21 +02:00
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//===----------------------------------------------------------------------===//
|
2002-11-20 23:28:10 +01:00
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//
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// This file defines an interface that allows bugpoint to run various passes
|
2003-10-10 19:57:28 +02:00
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// without the threat of a buggy pass corrupting bugpoint (of course, bugpoint
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// may have its own bugs, but that's another story...). It achieves this by
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2002-11-20 23:28:10 +01:00
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// forking a copy of itself and having the child process do the optimizations.
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// If this client dies, we can always fork a new one. :)
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//
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//===----------------------------------------------------------------------===//
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#include "BugDriver.h"
|
2012-12-04 11:44:52 +01:00
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|
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#include "llvm/Analysis/Verifier.h"
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|
|
#include "llvm/Bitcode/ReaderWriter.h"
|
2013-01-02 12:36:10 +01:00
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|
#include "llvm/IR/DataLayout.h"
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|
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#include "llvm/IR/Module.h"
|
2002-11-20 23:28:10 +01:00
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|
#include "llvm/PassManager.h"
|
2005-12-22 21:02:55 +01:00
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#include "llvm/Support/CommandLine.h"
|
2010-08-08 01:03:21 +02:00
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|
#include "llvm/Support/Debug.h"
|
2012-12-04 11:44:52 +01:00
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|
#include "llvm/Support/FileUtilities.h"
|
2010-11-29 19:16:10 +01:00
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|
#include "llvm/Support/Path.h"
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|
#include "llvm/Support/Program.h"
|
2012-12-04 11:44:52 +01:00
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|
#include "llvm/Support/SystemUtils.h"
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|
#include "llvm/Support/ToolOutputFile.h"
|
2006-01-26 19:37:21 +01:00
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|
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#define DONT_GET_PLUGIN_LOADER_OPTION
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#include "llvm/Support/PluginLoader.h"
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|
2003-08-07 23:19:30 +02:00
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|
#include <fstream>
|
2004-01-14 04:38:37 +01:00
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using namespace llvm;
|
2003-11-11 23:41:34 +01:00
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|
2009-09-07 21:26:11 +02:00
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namespace llvm {
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|
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extern cl::opt<std::string> OutputPrefix;
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|
|
}
|
2007-05-06 07:47:06 +02:00
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2005-12-22 21:02:55 +01:00
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namespace {
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// ChildOutput - This option captures the name of the child output file that
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// is set up by the parent bugpoint process
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cl::opt<std::string> ChildOutput("child-output", cl::ReallyHidden);
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}
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|
2007-07-04 23:55:50 +02:00
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/// writeProgramToFile - This writes the current "Program" to the named bitcode
|
2002-11-20 23:28:10 +01:00
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|
/// file. If an error occurs, true is returned.
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///
|
2002-12-24 00:49:59 +01:00
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bool BugDriver::writeProgramToFile(const std::string &Filename,
|
2010-07-28 20:12:30 +02:00
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|
|
const Module *M) const {
|
2009-08-23 09:49:08 +02:00
|
|
|
std::string ErrInfo;
|
2010-08-20 18:59:15 +02:00
|
|
|
tool_output_file Out(Filename.c_str(), ErrInfo,
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|
|
|
raw_fd_ostream::F_Binary);
|
|
|
|
if (ErrInfo.empty()) {
|
2010-09-01 16:20:41 +02:00
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|
|
WriteBitcodeToFile(M, Out.os());
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|
Out.os().close();
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|
|
|
if (!Out.os().has_error()) {
|
2010-08-20 18:59:15 +02:00
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|
Out.keep();
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|
return false;
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|
}
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|
}
|
2010-09-01 16:20:41 +02:00
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|
|
Out.os().clear_error();
|
2010-08-20 18:59:15 +02:00
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|
|
return true;
|
2002-11-20 23:28:10 +01:00
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|
|
}
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|
2007-07-04 23:55:50 +02:00
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/// EmitProgressBitcode - This function is used to output the current Program
|
2003-07-21 23:58:16 +02:00
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|
/// to a file named "bugpoint-ID.bc".
|
2002-11-20 23:28:10 +01:00
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///
|
2010-07-28 20:12:30 +02:00
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|
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void BugDriver::EmitProgressBitcode(const Module *M,
|
2010-08-05 02:29:04 +02:00
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const std::string &ID,
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|
|
bool NoFlyer) const {
|
2007-07-04 23:55:50 +02:00
|
|
|
// Output the input to the current pass to a bitcode file, emit a message
|
2002-11-20 23:28:10 +01:00
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|
// telling the user how to reproduce it: opt -foo blah.bc
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//
|
2009-09-07 21:26:11 +02:00
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|
std::string Filename = OutputPrefix + "-" + ID + ".bc";
|
2010-07-28 20:12:30 +02:00
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|
|
if (writeProgramToFile(Filename, M)) {
|
2009-07-16 17:30:09 +02:00
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|
|
errs() << "Error opening file '" << Filename << "' for writing!\n";
|
2002-11-20 23:28:10 +01:00
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|
return;
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|
|
}
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|
2009-07-16 17:30:09 +02:00
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|
|
outs() << "Emitted bitcode to '" << Filename << "'\n";
|
2004-02-19 00:24:56 +01:00
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|
if (NoFlyer || PassesToRun.empty()) return;
|
2009-07-16 17:30:09 +02:00
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|
outs() << "\n*** You can reproduce the problem with: ";
|
2009-08-18 08:08:01 +02:00
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|
|
if (UseValgrind) outs() << "valgrind ";
|
2012-03-20 00:42:11 +01:00
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|
outs() << "opt " << Filename;
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|
for (unsigned i = 0, e = PluginLoader::getNumPlugins(); i != e; ++i) {
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|
outs() << " -load " << PluginLoader::getPlugin(i);
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|
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|
}
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|
outs() << " " << getPassesString(PassesToRun) << "\n";
|
2002-11-20 23:28:10 +01:00
|
|
|
}
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|
2011-02-24 19:59:38 +01:00
|
|
|
cl::opt<bool> SilencePasses("silence-passes",
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|
|
|
cl::desc("Suppress output of running passes (both stdout and stderr)"));
|
2008-06-12 15:02:26 +02:00
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|
2010-08-09 00:14:20 +02:00
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|
static cl::list<std::string> OptArgs("opt-args", cl::Positional,
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|
|
cl::desc("<opt arguments>..."),
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|
|
cl::ZeroOrMore, cl::PositionalEatsArgs);
|
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|
2007-07-04 23:55:50 +02:00
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/// runPasses - Run the specified passes on Program, outputting a bitcode file
|
2003-10-10 19:57:28 +02:00
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|
/// and writing the filename into OutputFile if successful. If the
|
2002-11-20 23:28:10 +01:00
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|
|
/// optimizations fail for some reason (optimizer crashes), return true,
|
2007-07-04 23:55:50 +02:00
|
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|
/// otherwise return false. If DeleteOutput is set to true, the bitcode is
|
2002-11-20 23:28:10 +01:00
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|
|
/// deleted on success, and the filename string is undefined. This prints to
|
2009-07-16 17:30:09 +02:00
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|
|
/// outs() a single line message indicating whether compilation was successful
|
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|
/// or failed.
|
2002-11-20 23:28:10 +01:00
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|
///
|
2010-08-05 02:29:04 +02:00
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|
|
bool BugDriver::runPasses(Module *Program,
|
2010-08-08 05:55:08 +02:00
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|
const std::vector<std::string> &Passes,
|
2002-12-24 00:49:59 +01:00
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|
std::string &OutputFilename, bool DeleteOutput,
|
2007-11-14 07:47:06 +01:00
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|
|
bool Quiet, unsigned NumExtraArgs,
|
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|
const char * const *ExtraArgs) const {
|
2005-12-22 21:02:55 +01:00
|
|
|
// setup the output file name
|
2009-07-16 17:30:09 +02:00
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|
|
outs().flush();
|
2009-09-07 21:26:11 +02:00
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|
sys::Path uniqueFilename(OutputPrefix + "-output.bc");
|
2006-08-23 22:34:57 +02:00
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|
std::string ErrMsg;
|
|
|
|
if (uniqueFilename.makeUnique(true, &ErrMsg)) {
|
2009-07-16 17:30:09 +02:00
|
|
|
errs() << getToolName() << ": Error making unique filename: "
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|
<< ErrMsg << "\n";
|
2006-08-23 22:34:57 +02:00
|
|
|
return(1);
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|
|
|
}
|
2009-08-24 00:45:37 +02:00
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|
|
OutputFilename = uniqueFilename.str();
|
2002-11-20 23:28:10 +01:00
|
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|
|
2005-12-22 21:02:55 +01:00
|
|
|
// set up the input file name
|
2009-09-07 21:26:11 +02:00
|
|
|
sys::Path inputFilename(OutputPrefix + "-input.bc");
|
2006-08-23 22:34:57 +02:00
|
|
|
if (inputFilename.makeUnique(true, &ErrMsg)) {
|
2009-07-16 17:30:09 +02:00
|
|
|
errs() << getToolName() << ": Error making unique filename: "
|
|
|
|
<< ErrMsg << "\n";
|
2006-08-23 22:34:57 +02:00
|
|
|
return(1);
|
|
|
|
}
|
2010-11-03 17:14:07 +01:00
|
|
|
|
2009-08-23 09:49:08 +02:00
|
|
|
std::string ErrInfo;
|
2010-08-20 18:59:15 +02:00
|
|
|
tool_output_file InFile(inputFilename.c_str(), ErrInfo,
|
|
|
|
raw_fd_ostream::F_Binary);
|
2010-11-03 17:14:07 +01:00
|
|
|
|
|
|
|
|
2009-08-23 09:49:08 +02:00
|
|
|
if (!ErrInfo.empty()) {
|
2009-08-24 00:45:37 +02:00
|
|
|
errs() << "Error opening bitcode file: " << inputFilename.str() << "\n";
|
2009-08-23 09:49:08 +02:00
|
|
|
return 1;
|
2002-11-20 23:28:10 +01:00
|
|
|
}
|
2010-09-01 16:20:41 +02:00
|
|
|
WriteBitcodeToFile(Program, InFile.os());
|
|
|
|
InFile.os().close();
|
|
|
|
if (InFile.os().has_error()) {
|
2010-08-20 18:59:15 +02:00
|
|
|
errs() << "Error writing bitcode file: " << inputFilename.str() << "\n";
|
2010-09-01 16:20:41 +02:00
|
|
|
InFile.os().clear_error();
|
2010-08-20 18:59:15 +02:00
|
|
|
return 1;
|
|
|
|
}
|
2010-10-29 18:18:26 +02:00
|
|
|
|
2012-03-20 00:42:11 +01:00
|
|
|
sys::Path tool = sys::Program::FindProgramByName("opt");
|
2010-10-29 18:18:26 +02:00
|
|
|
if (tool.empty()) {
|
2012-03-20 00:42:11 +01:00
|
|
|
errs() << "Cannot find `opt' in PATH!\n";
|
2010-10-29 18:18:26 +02:00
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
// Ok, everything that could go wrong before running opt is done.
|
2010-08-20 18:59:15 +02:00
|
|
|
InFile.keep();
|
2005-12-22 21:02:55 +01:00
|
|
|
|
|
|
|
// setup the child process' arguments
|
2009-08-24 00:45:37 +02:00
|
|
|
SmallVector<const char*, 8> Args;
|
2010-08-24 19:44:07 +02:00
|
|
|
std::string Opt = tool.str();
|
2006-09-14 05:49:54 +02:00
|
|
|
if (UseValgrind) {
|
2009-08-24 00:45:37 +02:00
|
|
|
Args.push_back("valgrind");
|
|
|
|
Args.push_back("--error-exitcode=1");
|
|
|
|
Args.push_back("-q");
|
|
|
|
Args.push_back(tool.c_str());
|
2006-09-14 05:49:54 +02:00
|
|
|
} else
|
2010-08-08 01:03:21 +02:00
|
|
|
Args.push_back(Opt.c_str());
|
2006-09-14 05:49:54 +02:00
|
|
|
|
2010-08-08 01:03:21 +02:00
|
|
|
Args.push_back("-o");
|
2009-08-24 00:45:37 +02:00
|
|
|
Args.push_back(OutputFilename.c_str());
|
2010-08-09 00:14:20 +02:00
|
|
|
for (unsigned i = 0, e = OptArgs.size(); i != e; ++i)
|
|
|
|
Args.push_back(OptArgs[i].c_str());
|
2005-12-22 21:02:55 +01:00
|
|
|
std::vector<std::string> pass_args;
|
2006-01-26 19:37:21 +01:00
|
|
|
for (unsigned i = 0, e = PluginLoader::getNumPlugins(); i != e; ++i) {
|
|
|
|
pass_args.push_back( std::string("-load"));
|
|
|
|
pass_args.push_back( PluginLoader::getPlugin(i));
|
|
|
|
}
|
2010-08-08 05:55:08 +02:00
|
|
|
for (std::vector<std::string>::const_iterator I = Passes.begin(),
|
2005-12-22 21:02:55 +01:00
|
|
|
E = Passes.end(); I != E; ++I )
|
2010-08-08 05:55:08 +02:00
|
|
|
pass_args.push_back( std::string("-") + (*I) );
|
2005-12-22 21:02:55 +01:00
|
|
|
for (std::vector<std::string>::const_iterator I = pass_args.begin(),
|
|
|
|
E = pass_args.end(); I != E; ++I )
|
2009-08-24 00:45:37 +02:00
|
|
|
Args.push_back(I->c_str());
|
|
|
|
Args.push_back(inputFilename.c_str());
|
2007-11-14 07:47:06 +01:00
|
|
|
for (unsigned i = 0; i < NumExtraArgs; ++i)
|
2009-08-24 00:45:37 +02:00
|
|
|
Args.push_back(*ExtraArgs);
|
|
|
|
Args.push_back(0);
|
2005-12-22 21:02:55 +01:00
|
|
|
|
2010-08-08 01:03:21 +02:00
|
|
|
DEBUG(errs() << "\nAbout to run:\t";
|
|
|
|
for (unsigned i = 0, e = Args.size()-1; i != e; ++i)
|
|
|
|
errs() << " " << Args[i];
|
|
|
|
errs() << "\n";
|
|
|
|
);
|
|
|
|
|
2006-09-14 05:49:54 +02:00
|
|
|
sys::Path prog;
|
|
|
|
if (UseValgrind)
|
|
|
|
prog = sys::Program::FindProgramByName("valgrind");
|
|
|
|
else
|
2006-09-14 06:20:17 +02:00
|
|
|
prog = tool;
|
2010-11-03 17:14:07 +01:00
|
|
|
|
2008-06-12 15:02:26 +02:00
|
|
|
// Redirect stdout and stderr to nowhere if SilencePasses is given
|
|
|
|
sys::Path Nowhere;
|
|
|
|
const sys::Path *Redirects[3] = {0, &Nowhere, &Nowhere};
|
|
|
|
|
2009-08-24 00:45:37 +02:00
|
|
|
int result = sys::Program::ExecuteAndWait(prog, Args.data(), 0,
|
|
|
|
(SilencePasses ? Redirects : 0),
|
2007-02-16 20:11:07 +01:00
|
|
|
Timeout, MemoryLimit, &ErrMsg);
|
2004-05-12 04:55:45 +02:00
|
|
|
|
2007-07-04 23:55:50 +02:00
|
|
|
// If we are supposed to delete the bitcode file or if the passes crashed,
|
2004-05-12 04:55:45 +02:00
|
|
|
// remove it now. This may fail if the file was never created, but that's ok.
|
2005-12-22 21:02:55 +01:00
|
|
|
if (DeleteOutput || result != 0)
|
2005-07-08 05:08:58 +02:00
|
|
|
sys::Path(OutputFilename).eraseFromDisk();
|
2005-01-22 18:36:17 +01:00
|
|
|
|
2005-12-22 21:02:55 +01:00
|
|
|
// Remove the temporary input file as well
|
|
|
|
inputFilename.eraseFromDisk();
|
|
|
|
|
2003-06-02 06:54:16 +02:00
|
|
|
if (!Quiet) {
|
2005-12-22 21:02:55 +01:00
|
|
|
if (result == 0)
|
2009-07-16 17:30:09 +02:00
|
|
|
outs() << "Success!\n";
|
2005-12-22 21:02:55 +01:00
|
|
|
else if (result > 0)
|
2009-07-16 17:30:09 +02:00
|
|
|
outs() << "Exited with error code '" << result << "'\n";
|
2006-08-21 08:04:45 +02:00
|
|
|
else if (result < 0) {
|
|
|
|
if (result == -1)
|
2009-07-16 17:30:09 +02:00
|
|
|
outs() << "Execute failed: " << ErrMsg << "\n";
|
2006-08-21 08:04:45 +02:00
|
|
|
else
|
2011-05-21 02:56:46 +02:00
|
|
|
outs() << "Crashed: " << ErrMsg << "\n";
|
2006-08-21 08:04:45 +02:00
|
|
|
}
|
2005-12-22 21:02:55 +01:00
|
|
|
if (result & 0x01000000)
|
2009-07-16 17:30:09 +02:00
|
|
|
outs() << "Dumped core\n";
|
2003-06-02 06:54:16 +02:00
|
|
|
}
|
2002-11-20 23:28:10 +01:00
|
|
|
|
|
|
|
// Was the child successful?
|
2005-12-22 21:02:55 +01:00
|
|
|
return result != 0;
|
2002-11-20 23:28:10 +01:00
|
|
|
}
|
2003-11-11 23:41:34 +01:00
|
|
|
|
2004-03-14 22:17:03 +01:00
|
|
|
|
|
|
|
/// runPassesOn - Carefully run the specified set of pass on the specified
|
|
|
|
/// module, returning the transformed module on success, or a null pointer on
|
|
|
|
/// failure.
|
|
|
|
Module *BugDriver::runPassesOn(Module *M,
|
2010-08-08 05:55:08 +02:00
|
|
|
const std::vector<std::string> &Passes,
|
2007-11-14 07:47:06 +01:00
|
|
|
bool AutoDebugCrashes, unsigned NumExtraArgs,
|
|
|
|
const char * const *ExtraArgs) {
|
2007-07-04 23:55:50 +02:00
|
|
|
std::string BitcodeResult;
|
2010-08-05 02:29:04 +02:00
|
|
|
if (runPasses(M, Passes, BitcodeResult, false/*delete*/, true/*quiet*/,
|
2007-11-14 07:47:06 +01:00
|
|
|
NumExtraArgs, ExtraArgs)) {
|
2004-03-14 22:21:57 +01:00
|
|
|
if (AutoDebugCrashes) {
|
2009-07-16 17:30:09 +02:00
|
|
|
errs() << " Error running this sequence of passes"
|
|
|
|
<< " on the input program!\n";
|
2010-08-05 02:29:04 +02:00
|
|
|
delete swapProgramIn(M);
|
|
|
|
EmitProgressBitcode(M, "pass-error", false);
|
2004-03-14 22:21:57 +01:00
|
|
|
exit(debugOptimizerCrash());
|
|
|
|
}
|
2004-03-14 22:17:03 +01:00
|
|
|
return 0;
|
2004-03-14 22:21:57 +01:00
|
|
|
}
|
2004-03-14 22:17:03 +01:00
|
|
|
|
2009-07-01 18:58:40 +02:00
|
|
|
Module *Ret = ParseInputFile(BitcodeResult, Context);
|
2004-03-14 22:17:03 +01:00
|
|
|
if (Ret == 0) {
|
2009-07-16 17:30:09 +02:00
|
|
|
errs() << getToolName() << ": Error reading bitcode file '"
|
|
|
|
<< BitcodeResult << "'!\n";
|
2004-03-14 22:17:03 +01:00
|
|
|
exit(1);
|
|
|
|
}
|
2007-07-04 23:55:50 +02:00
|
|
|
sys::Path(BitcodeResult).eraseFromDisk(); // No longer need the file on disk
|
2004-03-14 22:17:03 +01:00
|
|
|
return Ret;
|
|
|
|
}
|