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//===--- SerializationTest.cpp - Experimental Object Serialization --------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements prototype code for serialization of objects in clang.
// It is not intended yet for public use, but simply is a placeholder to
// experiment with new serialization features. Serialization will eventually
// be integrated as a proper component of the clang libraries.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/ASTConsumer.h"
#include "clang/AST/CFG.h"
#include "clang/AST/Decl.h"
#include "clang.h"
#include "ASTConsumers.h"
#include "clang/AST/TranslationUnit.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/Support/Streams.h"
#include <fstream>
#include <cstring>
using namespace clang;
//===----------------------------------------------------------------------===//
// Driver code.
//===----------------------------------------------------------------------===//
namespace {
class SerializationTest : public ASTConsumer {
Diagnostic &Diags;
FileManager &FMgr;
public:
SerializationTest(Diagnostic &d, FileManager& fmgr)
: Diags(d), FMgr(fmgr) {}
~SerializationTest() {}
virtual void HandleTranslationUnit(TranslationUnit& TU);
private:
bool Serialize(llvm::sys::Path& Filename, llvm::sys::Path& FNameDeclPrint,
TranslationUnit& TU);
bool Deserialize(llvm::sys::Path& Filename, llvm::sys::Path& FNameDeclPrint);
};
} // end anonymous namespace
ASTConsumer*
clang::CreateSerializationTest(Diagnostic &Diags, FileManager& FMgr) {
return new SerializationTest(Diags, FMgr);
}
bool SerializationTest::Serialize(llvm::sys::Path& Filename,
llvm::sys::Path& FNameDeclPrint,
TranslationUnit& TU) {
{
// Pretty-print the decls to a temp file.
std::string Err;
llvm::raw_fd_ostream DeclPP(FNameDeclPrint.c_str(), true, Err);
assert (Err.empty() && "Could not open file for printing out decls.");
llvm::OwningPtr<ASTConsumer> FilePrinter(CreateASTPrinter(&DeclPP));
for (TranslationUnit::iterator I=TU.begin(), E=TU.end(); I!=E; ++I)
FilePrinter->HandleTopLevelDecl(*I);
}
// Serialize the translation unit.
return EmitASTBitcodeFile(TU,Filename);
}
bool SerializationTest::Deserialize(llvm::sys::Path& Filename,
llvm::sys::Path& FNameDeclPrint) {
// Deserialize the translation unit.
TranslationUnit* NewTU = ReadASTBitcodeFile(Filename, FMgr);
if (!NewTU)
return false;
{
// Pretty-print the deserialized decls to a temp file.
std::string Err;
llvm::raw_fd_ostream DeclPP(FNameDeclPrint.c_str(), true, Err);
assert (Err.empty() && "Could not open file for printing out decls.");
llvm::OwningPtr<ASTConsumer> FilePrinter(CreateASTPrinter(&DeclPP));
for (TranslationUnit::iterator I=NewTU->begin(), E=NewTU->end(); I!=E; ++I)
FilePrinter->HandleTopLevelDecl(*I);
}
delete NewTU;
return true;
}
namespace {
class TmpDirJanitor {
llvm::sys::Path& Dir;
public:
explicit TmpDirJanitor(llvm::sys::Path& dir) : Dir(dir) {}
~TmpDirJanitor() {
llvm::cerr << "Removing: " << Dir.c_str() << '\n';
Dir.eraseFromDisk(true);
}
};
}
void SerializationTest::HandleTranslationUnit(TranslationUnit& TU) {
std::string ErrMsg;
llvm::sys::Path Dir = llvm::sys::Path::GetTemporaryDirectory(&ErrMsg);
if (Dir.isEmpty()) {
llvm::cerr << "Error: " << ErrMsg << "\n";
return;
}
TmpDirJanitor RemoveTmpOnExit(Dir);
llvm::sys::Path FNameDeclBefore = Dir;
FNameDeclBefore.appendComponent("test.decl_before.txt");
if (FNameDeclBefore.makeUnique(true,&ErrMsg)) {
llvm::cerr << "Error: " << ErrMsg << "\n";
return;
}
llvm::sys::Path FNameDeclAfter = Dir;
FNameDeclAfter.appendComponent("test.decl_after.txt");
if (FNameDeclAfter.makeUnique(true,&ErrMsg)) {
llvm::cerr << "Error: " << ErrMsg << "\n";
return;
}
llvm::sys::Path ASTFilename = Dir;
ASTFilename.appendComponent("test.ast");
if (ASTFilename.makeUnique(true,&ErrMsg)) {
llvm::cerr << "Error: " << ErrMsg << "\n";
return;
}
// Serialize and then deserialize the ASTs.
bool status = Serialize(ASTFilename, FNameDeclBefore, TU);
assert (status && "Serialization failed.");
status = Deserialize(ASTFilename, FNameDeclAfter);
assert (status && "Deserialization failed.");
// Read both pretty-printed files and compare them.
using llvm::MemoryBuffer;
llvm::OwningPtr<MemoryBuffer>
MBufferSer(MemoryBuffer::getFile(FNameDeclBefore.c_str()));
if(!MBufferSer) {
llvm::cerr << "ERROR: Cannot read pretty-printed file (pre-pickle).\n";
return;
}
llvm::OwningPtr<MemoryBuffer>
MBufferDSer(MemoryBuffer::getFile(FNameDeclAfter.c_str()));
if(!MBufferDSer) {
llvm::cerr << "ERROR: Cannot read pretty-printed file (post-pickle).\n";
return;
}
const char *p1 = MBufferSer->getBufferStart();
const char *e1 = MBufferSer->getBufferEnd();
const char *p2 = MBufferDSer->getBufferStart();
const char *e2 = MBufferDSer->getBufferEnd();
if (MBufferSer->getBufferSize() == MBufferDSer->getBufferSize())
for ( ; p1 != e1 ; ++p1, ++p2 )
if (*p1 != *p2) break;
if (p1 != e1 || p2 != e2 )
llvm::cerr << "ERROR: Pretty-printed files are not the same.\n";
else
llvm::cerr << "SUCCESS: Pretty-printed files are the same.\n";
}
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