forked from OSchip/llvm-project
Revampled Serialization Tester to serialize and deserialize out an entire ASTContext and top-level decls.
llvm-svn: 43773
This commit is contained in:
Ted Kremenek
parent
e344bbbe84
commit
3a68de993a
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@ -23,8 +23,8 @@
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/Bitcode/Serialize.h"
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#include "llvm/Bitcode/Deserialize.h"
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#include "llvm/System/TimeValue.h"
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#include <stdio.h>
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#include <list>
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//===----------------------------------------------------------------------===//
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// Driver code.
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@ -43,164 +43,213 @@ template<typename T> struct Janitor {
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class SerializationTest : public ASTConsumer {
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ASTContext* Context;
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llvm::sys::Path Filename;
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std::vector<unsigned char>* Buffer;
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llvm::BitstreamWriter* OBStream;
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llvm::Serializer* serializer;
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std::list<Decl*> Decls;
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enum { ContextBlock = 0x1, DeclBlock = 0x3 };
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void DeserializeTest();
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public:
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SerializationTest(llvm::sys::Path filename);
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SerializationTest() : Context(NULL) {};
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~SerializationTest();
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virtual void Initialize(ASTContext& context, unsigned);
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virtual void HandleTopLevelDecl(Decl *D);
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virtual void Initialize(ASTContext& context, unsigned) {
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Context = &context;
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}
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virtual void HandleTopLevelDecl(Decl *D) {
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Decls.push_back(D);
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}
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private:
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void Serialize(llvm::sys::Path& Filename);
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void Deserialize(llvm::sys::Path& Filename);
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};
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} // end anonymous namespace
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ASTConsumer* clang::CreateSerializationTest() {
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std::string ErrMsg;
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llvm::sys::Path Filename = llvm::sys::Path::GetTemporaryDirectory(&ErrMsg);
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if (Filename.isEmpty()) {
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llvm::cerr << "Error: " << ErrMsg << "\n";
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return NULL;
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}
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Filename.appendComponent("test.ast");
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if (Filename.makeUnique(true,&ErrMsg)) {
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llvm::cerr << "Error: " << ErrMsg << "\n";
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return NULL;
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}
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return new SerializationTest(Filename);
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return new SerializationTest();
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}
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SerializationTest::SerializationTest(llvm::sys::Path filename)
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: Filename(filename), OBStream(NULL), serializer(NULL) {
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static void WritePreamble(llvm::BitstreamWriter& Stream) {
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Stream.Emit((unsigned)'B', 8);
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Stream.Emit((unsigned)'C', 8);
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Stream.Emit(0xC, 4);
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Stream.Emit(0xF, 4);
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Stream.Emit(0xE, 4);
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Stream.Emit(0x0, 4);
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}
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static bool ReadPremable(llvm::BitstreamReader& Stream) {
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return Stream.Read(8) != 'B' ||
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Stream.Read(8) != 'C' ||
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Stream.Read(4) != 0xC ||
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Stream.Read(4) != 0xF ||
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Stream.Read(4) != 0xE ||
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Stream.Read(4) != 0x0;
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}
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void SerializationTest::Serialize(llvm::sys::Path& Filename) {
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// Reserve 256K for bitstream buffer.
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Buffer = new std::vector<unsigned char>();
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assert (Buffer && "Could not allocate buffer.");
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Buffer->reserve(256*1024);
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std::vector<unsigned char> Buffer;
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Buffer.reserve(256*1024);
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// Open bitstream and write preamble.
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OBStream = new llvm::BitstreamWriter(*Buffer);
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assert (OBStream && "could not create bitstream for serialization");
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// Create bitstream and write preamble.
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llvm::BitstreamWriter Stream(Buffer);
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WritePreamble(Stream);
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OBStream->Emit((unsigned)'B', 8);
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OBStream->Emit((unsigned)'C', 8);
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OBStream->Emit(0xC, 4);
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OBStream->Emit(0xF, 4);
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OBStream->Emit(0xE, 4);
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OBStream->Emit(0x0, 4);
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// Create serializer.
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llvm::Serializer Sezr(Stream);
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// Open serializer.
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serializer = new llvm::Serializer(*OBStream,0);
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assert (serializer && "could not create serializer");
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}
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// ===---------------------------------------------------===/
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// Serialize the "Translation Unit" metadata.
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// ===---------------------------------------------------===/
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Sezr.EnterBlock(ContextBlock);
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void SerializationTest::Initialize(ASTContext& context, unsigned) {
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llvm::cerr << "[ " << TimeValue::now().toString() << " ] "
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<< "Faux-serializing: SourceManager et al.\n";
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// "Fake" emit the SourceManager.
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llvm::cerr << "Faux-serializing: SourceManager.\n";
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Sezr.EmitPtr(&Context->SourceMgr);
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serializer->EnterBlock();
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// "Fake" emit the SourceManager, etc.
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Context = &context;
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serializer->EmitPtr(&context.SourceMgr);
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serializer->EmitPtr(&context.Target);
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serializer->EmitPtr(&context.Idents);
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serializer->EmitPtr(&context.Selectors);
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// "Fake" emit the Target.
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llvm::cerr << "Faux-serializing: Target.\n";
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Sezr.EmitPtr(&Context->Target);
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llvm::cerr << "[ " << TimeValue::now().toString() << " ] "
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<< "Serializing: ASTContext.\n";
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// "Fake" emit Selectors.
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llvm::cerr << "Faux-serializing: Selectors.\n";
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Sezr.EmitPtr(&Context->Selectors);
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// Emit the Identifier Table.
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llvm::cerr << "Serializing: IdentifierTable.\n";
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Sezr.EmitOwnedPtr(&Context->Idents);
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serializer->EmitOwnedPtr(&context);
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serializer->ExitBlock();
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}
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// Emit the ASTContext.
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llvm::cerr << "Serializing: ASTContext.\n";
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Sezr.EmitOwnedPtr(Context);
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void SerializationTest::HandleTopLevelDecl(Decl *D) {
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llvm::cerr << "[ " << TimeValue::now().toString() << " ] "
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<< "Serializing: Decl.\n";
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Sezr.ExitBlock();
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serializer->EnterBlock();
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serializer->EmitOwnedPtr(D);
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serializer->ExitBlock();
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}
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// ===---------------------------------------------------===/
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// Serialize the top-level decls.
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// ===---------------------------------------------------===/
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SerializationTest::~SerializationTest() {
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delete serializer;
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delete OBStream;
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Sezr.EnterBlock(DeclBlock);
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for (std::list<Decl*>::iterator I=Decls.begin(), E=Decls.end(); I!=E; ++I) {
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llvm::cerr << "Serializing: Decl.\n";
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Sezr.EmitOwnedPtr(*I);
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}
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Sezr.ExitBlock();
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// ===---------------------------------------------------===/
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// Finalize serialization: write the bits to disk.
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// ===---------------------------------------------------===/
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if (FILE *fp = fopen(Filename.c_str(),"wb")) {
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fwrite((char*)&Buffer->front(), sizeof(char), Buffer->size(), fp);
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delete Buffer;
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fwrite((char*)&Buffer.front(), sizeof(char), Buffer.size(), fp);
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fclose(fp);
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}
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else {
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llvm::cerr << "Error: Cannot open " << Filename.c_str() << "\n";
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delete Buffer;
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return;
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}
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llvm::cerr << "[ " << TimeValue::now().toString() << " ] "
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<< "Commited bitstream to disk: " << Filename.c_str() << "\n";
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DeserializeTest();
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llvm::cerr << "Commited bitstream to disk: " << Filename.c_str() << "\n";
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}
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void SerializationTest::DeserializeTest() {
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llvm::MemoryBuffer* MBuffer =
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llvm::MemoryBuffer::getFile(Filename.c_str(), strlen(Filename.c_str()));
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void SerializationTest::Deserialize(llvm::sys::Path& Filename) {
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// Create the memory buffer that contains the contents of the file.
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using llvm::MemoryBuffer;
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MemoryBuffer* MBuffer = MemoryBuffer::getFile(Filename.c_str(),
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strlen(Filename.c_str()));
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if(!MBuffer) {
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llvm::cerr << "ERROR: Cannot read file for deserialization.\n";
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return;
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}
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Janitor<llvm::MemoryBuffer> AutoReleaseBuffer(MBuffer);
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// Create an "autocollector" object to release the memory buffer upon
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// termination of the current scope.
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Janitor<MemoryBuffer> AutoReleaseBuffer(MBuffer);
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// Check if the file is of the proper length.
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if (MBuffer->getBufferSize() & 0x3) {
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llvm::cerr << "ERROR: AST file should be a multiple of 4 bytes in length.\n";
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llvm::cerr << "ERROR: AST file length should be a multiple of 4 bytes.\n";
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return;
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}
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unsigned char *BufPtr = (unsigned char *)MBuffer->getBufferStart();
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llvm::BitstreamReader IBStream(BufPtr,BufPtr+MBuffer->getBufferSize());
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// Create the bitstream reader.
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unsigned char *BufPtr = (unsigned char *) MBuffer->getBufferStart();
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llvm::BitstreamReader Stream(BufPtr,BufPtr+MBuffer->getBufferSize());
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// Sniff for the signature.
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if (IBStream.Read(8) != 'B' ||
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IBStream.Read(8) != 'C' ||
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IBStream.Read(4) != 0xC ||
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IBStream.Read(4) != 0xF ||
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IBStream.Read(4) != 0xE ||
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IBStream.Read(4) != 0x0) {
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// Sniff for the signature in the bitcode file.
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if (!ReadPremable(Stream)) {
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llvm::cerr << "ERROR: Invalid AST-bitcode signature.\n";
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return;
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}
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llvm::Deserializer deserializer(IBStream);
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// Create the Dezr.
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llvm::Deserializer Dezr(Stream);
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// ===---------------------------------------------------===/
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// Deserialize the "Translation Unit" metadata.
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// ===---------------------------------------------------===/
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// "Fake" read the SourceManager, etc.
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llvm::cerr << "[ " << TimeValue::now().toString() << " ] "
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<< "Faux-Deserializing: SourceManager et al.\n";
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// "Fake" read the SourceManager.
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llvm::cerr << "Faux-Deserializing: SourceManager.\n";
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Dezr.RegisterPtr(&Context->SourceMgr);
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deserializer.RegisterPtr(&Context->SourceMgr);
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deserializer.RegisterPtr(&Context->Target);
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deserializer.RegisterPtr(&Context->Idents);
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deserializer.RegisterPtr(&Context->Selectors);
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// "Fake" read the TargetInfo.
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llvm::cerr << "Faux-Deserializing: Target.\n";
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Dezr.RegisterPtr(&Context->Target);
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llvm::cerr << "[ " << TimeValue::now().toString() << " ] "
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<< "Deserializing: ASTContext.\n";
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// "Fake" read the Selectors.
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llvm::cerr << "Faux-Deserializing: Selectors.\n";
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Dezr.RegisterPtr(&Context->Selectors);
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// Deserialize the AST context.
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deserializer.ReadOwnedPtr<ASTContext>();
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// ASTContext* context =
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// Read the identifier table.
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llvm::cerr << "Deserializing: IdentifierTable\n";
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Dezr.ReadOwnedPtr<IdentifierTable>();
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// Read the ASTContext.
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llvm::cerr << "Deserializing: ASTContext.\n";
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Dezr.ReadOwnedPtr<ASTContext>();
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// Create a printer to "consume" our deserialized ASTS.
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ASTConsumer* Printer = CreateASTPrinter();
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Janitor<ASTConsumer> PrinterJanitor(Printer);
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// The remaining objects in the file are top-level decls.
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while (!Dezr.AtEnd()) {
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llvm::cerr << "Deserializing: Decl.\n";
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Decl* decl = Dezr.ReadOwnedPtr<Decl>();
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Printer->HandleTopLevelDecl(decl);
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}
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}
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SerializationTest::~SerializationTest() {
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std::string ErrMsg;
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llvm::sys::Path Filename = llvm::sys::Path::GetTemporaryDirectory(&ErrMsg);
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if (Filename.isEmpty()) {
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llvm::cerr << "Error: " << ErrMsg << "\n";
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return;
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}
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Filename.appendComponent("test.ast");
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if (Filename.makeUnique(true,&ErrMsg)) {
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llvm::cerr << "Error: " << ErrMsg << "\n";
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return;
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}
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Serialize(Filename);
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Deserialize(Filename);
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}
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