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/* Copyright 2013 The Native Client Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can
* be found in the LICENSE file.
*/
//===-- pnacl-freeze.cpp - The low-level NaCl bitcode freezer --------===//
//
//===----------------------------------------------------------------------===//
//
// Generates NaCl pexe wire format.
//
//===----------------------------------------------------------------------===//
#include "llvm/IR/LLVMContext.h"
// Note: We need the following to provide the API for calling the NaCl
// Bitcode Writer to generate the frozen file.
#include "llvm/Bitcode/NaCl/NaClReaderWriter.h"
// Note: We need the following to provide the API for calling the (LLVM)
// Bitcode Reader to read in the corresonding pexe file to freeze.
#include "llvm/Bitcode/ReaderWriter.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/DataStream.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/Signals.h"
#include "llvm/Support/ToolOutputFile.h"
using namespace llvm;
static cl::opt<std::string>
OutputFilename("o", cl::desc("Specify output filename"),
cl::value_desc("filename"), cl::init("-"));
static cl::opt<std::string>
InputFilename(cl::Positional, cl::desc("<pexe file>"), cl::init("-"));
static void WriteOutputFile(const Module *M) {
std::string ErrorInfo;
OwningPtr<tool_output_file> Out
(new tool_output_file(OutputFilename.c_str(), ErrorInfo,
raw_fd_ostream::F_Binary));
if (!ErrorInfo.empty()) {
errs() << ErrorInfo << '\n';
exit(1);
}
NaClWriteBitcodeToFile(M, Out->os());
// Declare success.
Out->keep();
}
int main(int argc, char **argv) {
// 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.
cl::ParseCommandLineOptions(argc, argv, "Generates NaCl pexe wire format\n");
std::string ErrorMessage;
std::auto_ptr<Module> M;
// Use the bitcode streaming interface
DataStreamer *streamer = getDataFileStreamer(InputFilename, &ErrorMessage);
if (streamer) {
std::string DisplayFilename;
if (InputFilename == "-")
DisplayFilename = "<stdin>";
else
DisplayFilename = InputFilename;
M.reset(getStreamedBitcodeModule(DisplayFilename, streamer, Context,
&ErrorMessage));
if(M.get() != 0 && M->MaterializeAllPermanently(&ErrorMessage)) {
M.reset();
}
}
if (M.get() == 0) {
errs() << argv[0] << ": ";
if (ErrorMessage.size())
errs() << ErrorMessage << "\n";
else
errs() << "bitcode didn't read correctly.\n";
return 1;
}
WriteOutputFile(M.get());
return 0;
}
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