forked from OSchip/llvm-project
122 lines
4.0 KiB
C++
122 lines
4.0 KiB
C++
//===-- TestModuleFileExtension.cpp - Module Extension Tester -------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
#include "TestModuleFileExtension.h"
|
|
#include "clang/Frontend/FrontendDiagnostic.h"
|
|
#include "clang/Serialization/ASTReader.h"
|
|
#include "llvm/ADT/Hashing.h"
|
|
#include "llvm/Bitcode/BitstreamWriter.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
#include <cstdio>
|
|
using namespace clang;
|
|
using namespace clang::serialization;
|
|
|
|
TestModuleFileExtension::Writer::~Writer() { }
|
|
|
|
void TestModuleFileExtension::Writer::writeExtensionContents(
|
|
Sema &SemaRef,
|
|
llvm::BitstreamWriter &Stream) {
|
|
using namespace llvm;
|
|
|
|
// Write an abbreviation for this record.
|
|
auto Abv = std::make_shared<llvm::BitCodeAbbrev>();
|
|
Abv->Add(BitCodeAbbrevOp(FIRST_EXTENSION_RECORD_ID));
|
|
Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 6)); // # of characters
|
|
Abv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // message
|
|
auto Abbrev = Stream.EmitAbbrev(std::move(Abv));
|
|
|
|
// Write a message into the extension block.
|
|
SmallString<64> Message;
|
|
{
|
|
auto Ext = static_cast<TestModuleFileExtension *>(getExtension());
|
|
raw_svector_ostream OS(Message);
|
|
OS << "Hello from " << Ext->BlockName << " v" << Ext->MajorVersion << "."
|
|
<< Ext->MinorVersion;
|
|
}
|
|
uint64_t Record[] = {FIRST_EXTENSION_RECORD_ID, Message.size()};
|
|
Stream.EmitRecordWithBlob(Abbrev, Record, Message);
|
|
}
|
|
|
|
TestModuleFileExtension::Reader::Reader(ModuleFileExtension *Ext,
|
|
const llvm::BitstreamCursor &InStream)
|
|
: ModuleFileExtensionReader(Ext), Stream(InStream)
|
|
{
|
|
// Read the extension block.
|
|
SmallVector<uint64_t, 4> Record;
|
|
while (true) {
|
|
llvm::BitstreamEntry Entry = Stream.advanceSkippingSubblocks();
|
|
switch (Entry.Kind) {
|
|
case llvm::BitstreamEntry::SubBlock:
|
|
case llvm::BitstreamEntry::EndBlock:
|
|
case llvm::BitstreamEntry::Error:
|
|
return;
|
|
|
|
case llvm::BitstreamEntry::Record:
|
|
break;
|
|
}
|
|
|
|
Record.clear();
|
|
StringRef Blob;
|
|
unsigned RecCode = Stream.readRecord(Entry.ID, Record, &Blob);
|
|
switch (RecCode) {
|
|
case FIRST_EXTENSION_RECORD_ID: {
|
|
StringRef Message = Blob.substr(0, Record[0]);
|
|
fprintf(stderr, "Read extension block message: %s\n",
|
|
Message.str().c_str());
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
TestModuleFileExtension::Reader::~Reader() { }
|
|
|
|
TestModuleFileExtension::~TestModuleFileExtension() { }
|
|
|
|
ModuleFileExtensionMetadata
|
|
TestModuleFileExtension::getExtensionMetadata() const {
|
|
return { BlockName, MajorVersion, MinorVersion, UserInfo };
|
|
}
|
|
|
|
llvm::hash_code TestModuleFileExtension::hashExtension(
|
|
llvm::hash_code Code) const {
|
|
if (Hashed) {
|
|
Code = llvm::hash_combine(Code, BlockName);
|
|
Code = llvm::hash_combine(Code, MajorVersion);
|
|
Code = llvm::hash_combine(Code, MinorVersion);
|
|
Code = llvm::hash_combine(Code, UserInfo);
|
|
}
|
|
|
|
return Code;
|
|
}
|
|
|
|
std::unique_ptr<ModuleFileExtensionWriter>
|
|
TestModuleFileExtension::createExtensionWriter(ASTWriter &) {
|
|
return std::unique_ptr<ModuleFileExtensionWriter>(new Writer(this));
|
|
}
|
|
|
|
std::unique_ptr<ModuleFileExtensionReader>
|
|
TestModuleFileExtension::createExtensionReader(
|
|
const ModuleFileExtensionMetadata &Metadata,
|
|
ASTReader &Reader, serialization::ModuleFile &Mod,
|
|
const llvm::BitstreamCursor &Stream)
|
|
{
|
|
assert(Metadata.BlockName == BlockName && "Wrong block name");
|
|
if (std::make_pair(Metadata.MajorVersion, Metadata.MinorVersion) !=
|
|
std::make_pair(MajorVersion, MinorVersion)) {
|
|
Reader.getDiags().Report(Mod.ImportLoc,
|
|
diag::err_test_module_file_extension_version)
|
|
<< BlockName << Metadata.MajorVersion << Metadata.MinorVersion
|
|
<< MajorVersion << MinorVersion;
|
|
return nullptr;
|
|
}
|
|
|
|
return std::unique_ptr<ModuleFileExtensionReader>(
|
|
new TestModuleFileExtension::Reader(this, Stream));
|
|
}
|