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Unified Diff: tools/pnacl-thaw/pnacl-thaw.cpp

Issue 939073008: Rebased PNaCl localmods in LLVM to 223109 (Closed)
Patch Set: undo localmod Created 5 years, 10 months ago
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Index: tools/pnacl-thaw/pnacl-thaw.cpp
diff --git a/tools/pnacl-thaw/pnacl-thaw.cpp b/tools/pnacl-thaw/pnacl-thaw.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..4b993e320d83acb83daf05f4cab2187c47d7334c
--- /dev/null
+++ b/tools/pnacl-thaw/pnacl-thaw.cpp
@@ -0,0 +1,105 @@
+/* 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-thaw.cpp - The low-level NaCl bitcode thawer ----------------===//
+//
+//===----------------------------------------------------------------------===//
+//
+// Converts NaCl wire format back to LLVM bitcode.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Bitcode/NaCl/NaClReaderWriter.h"
+#include "llvm/Bitcode/ReaderWriter.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/Module.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/DataStream.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/Signals.h"
+#include "llvm/Support/StreamingMemoryObject.h"
+#include "llvm/Support/ToolOutputFile.h"
+
+using namespace llvm;
+
+static cl::opt<std::string>
+OutputFilename("o", cl::desc("Specify thawed pexe filename"),
+ cl::value_desc("filename"), cl::init("-"));
+
+static cl::opt<std::string>
+InputFilename(cl::Positional, cl::desc("<frozen file>"), cl::init("-"));
+
+static cl::opt<bool>
+VerboseErrors(
+ "verbose-parse-errors",
+ cl::desc("Print out more descriptive PNaCl bitcode parse errors"),
+ cl::init(false));
+
+static void WriteOutputFile(const Module *M) {
+
+ std::error_code EC;
+ std::unique_ptr<tool_output_file> Out(
+ new tool_output_file(OutputFilename, EC, sys::fs::F_None));
+ if (EC) {
+ errs() << EC.message() << '\n';
+ exit(1);
+ }
+
+ WriteBitcodeToFile(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, "Converts NaCl pexe wire format into LLVM bitcode format\n");
+
+ std::string ErrorMessage;
+ std::auto_ptr<Module> M;
+
+ // Use the bitcode streaming interface
+ DataStreamer *streamer = getDataFileStreamer(InputFilename, &ErrorMessage);
+ std::unique_ptr<StreamingMemoryObject> Buffer(
+ new StreamingMemoryObjectImpl(streamer));
+ if (streamer) {
+ std::string DisplayFilename;
+ if (InputFilename == "-")
+ DisplayFilename = "<stdin>";
+ else
+ DisplayFilename = InputFilename;
+ raw_ostream *Verbose = VerboseErrors ? &errs() : nullptr;
+ M.reset(getNaClStreamedBitcodeModule(DisplayFilename, Buffer.release(),
+ Context, Verbose,
+ &ErrorMessage,
+ /*AcceptSupportedOnly=*/false));
+ if (M.get())
+ if (std::error_code EC = M->materializeAllPermanently()) {
+ ErrorMessage = EC.message();
+ M.reset();
+ }
+ }
+
+ if (!M.get()) {
+ 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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