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2022-04-25 13:02:35 +02:00
//===--- SerializedDiagnosticPrinter.cpp - Serializer for diagnostics -----===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "clang/Frontend/SerializedDiagnosticPrinter.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/DiagnosticOptions.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Frontend/DiagnosticRenderer.h"
#include "clang/Frontend/FrontendDiagnostic.h"
#include "clang/Frontend/SerializedDiagnosticReader.h"
#include "clang/Frontend/SerializedDiagnostics.h"
#include "clang/Frontend/TextDiagnosticPrinter.h"
#include "clang/Lex/Lexer.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Bitstream/BitCodes.h"
#include "llvm/Bitstream/BitstreamReader.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/raw_ostream.h"
#include <utility>
using namespace clang;
using namespace clang::serialized_diags;
namespace {
class AbbreviationMap {
llvm::DenseMap<unsigned, unsigned> Abbrevs;
public:
AbbreviationMap() {}
void set(unsigned recordID, unsigned abbrevID) {
assert(Abbrevs.find(recordID) == Abbrevs.end()
&& "Abbreviation already set.");
Abbrevs[recordID] = abbrevID;
}
unsigned get(unsigned recordID) {
assert(Abbrevs.find(recordID) != Abbrevs.end() &&
"Abbreviation not set.");
return Abbrevs[recordID];
}
};
typedef SmallVector<uint64_t, 64> RecordData;
typedef SmallVectorImpl<uint64_t> RecordDataImpl;
typedef ArrayRef<uint64_t> RecordDataRef;
class SDiagsWriter;
class SDiagsRenderer : public DiagnosticNoteRenderer {
SDiagsWriter &Writer;
public:
SDiagsRenderer(SDiagsWriter &Writer, const LangOptions &LangOpts,
DiagnosticOptions *DiagOpts)
: DiagnosticNoteRenderer(LangOpts, DiagOpts), Writer(Writer) {}
~SDiagsRenderer() override {}
protected:
void emitDiagnosticMessage(FullSourceLoc Loc, PresumedLoc PLoc,
DiagnosticsEngine::Level Level, StringRef Message,
ArrayRef<CharSourceRange> Ranges,
DiagOrStoredDiag D) override;
void emitDiagnosticLoc(FullSourceLoc Loc, PresumedLoc PLoc,
DiagnosticsEngine::Level Level,
ArrayRef<CharSourceRange> Ranges) override {}
void emitNote(FullSourceLoc Loc, StringRef Message) override;
void emitCodeContext(FullSourceLoc Loc, DiagnosticsEngine::Level Level,
SmallVectorImpl<CharSourceRange> &Ranges,
ArrayRef<FixItHint> Hints) override;
void beginDiagnostic(DiagOrStoredDiag D,
DiagnosticsEngine::Level Level) override;
void endDiagnostic(DiagOrStoredDiag D,
DiagnosticsEngine::Level Level) override;
};
typedef llvm::DenseMap<unsigned, unsigned> AbbrevLookup;
class SDiagsMerger : SerializedDiagnosticReader {
SDiagsWriter &Writer;
AbbrevLookup FileLookup;
AbbrevLookup CategoryLookup;
AbbrevLookup DiagFlagLookup;
public:
SDiagsMerger(SDiagsWriter &Writer)
: SerializedDiagnosticReader(), Writer(Writer) {}
std::error_code mergeRecordsFromFile(const char *File) {
return readDiagnostics(File);
}
protected:
std::error_code visitStartOfDiagnostic() override;
std::error_code visitEndOfDiagnostic() override;
std::error_code visitCategoryRecord(unsigned ID, StringRef Name) override;
std::error_code visitDiagFlagRecord(unsigned ID, StringRef Name) override;
std::error_code visitDiagnosticRecord(
unsigned Severity, const serialized_diags::Location &Location,
unsigned Category, unsigned Flag, StringRef Message) override;
std::error_code visitFilenameRecord(unsigned ID, unsigned Size,
unsigned Timestamp,
StringRef Name) override;
std::error_code visitFixitRecord(const serialized_diags::Location &Start,
const serialized_diags::Location &End,
StringRef CodeToInsert) override;
std::error_code
visitSourceRangeRecord(const serialized_diags::Location &Start,
const serialized_diags::Location &End) override;
private:
std::error_code adjustSourceLocFilename(RecordData &Record,
unsigned int offset);
void adjustAbbrevID(RecordData &Record, AbbrevLookup &Lookup,
unsigned NewAbbrev);
void writeRecordWithAbbrev(unsigned ID, RecordData &Record);
void writeRecordWithBlob(unsigned ID, RecordData &Record, StringRef Blob);
};
class SDiagsWriter : public DiagnosticConsumer {
friend class SDiagsRenderer;
friend class SDiagsMerger;
struct SharedState;
explicit SDiagsWriter(std::shared_ptr<SharedState> State)
: LangOpts(nullptr), OriginalInstance(false), MergeChildRecords(false),
State(std::move(State)) {}
public:
SDiagsWriter(StringRef File, DiagnosticOptions *Diags, bool MergeChildRecords)
: LangOpts(nullptr), OriginalInstance(true),
MergeChildRecords(MergeChildRecords),
State(std::make_shared<SharedState>(File, Diags)) {
if (MergeChildRecords)
RemoveOldDiagnostics();
EmitPreamble();
}
~SDiagsWriter() override {}
void HandleDiagnostic(DiagnosticsEngine::Level DiagLevel,
const Diagnostic &Info) override;
void BeginSourceFile(const LangOptions &LO, const Preprocessor *PP) override {
LangOpts = &LO;
}
void finish() override;
private:
/// Build a DiagnosticsEngine to emit diagnostics about the diagnostics
DiagnosticsEngine *getMetaDiags();
/// Remove old copies of the serialized diagnostics. This is necessary
/// so that we can detect when subprocesses write diagnostics that we should
/// merge into our own.
void RemoveOldDiagnostics();
/// Emit the preamble for the serialized diagnostics.
void EmitPreamble();
/// Emit the BLOCKINFO block.
void EmitBlockInfoBlock();
/// Emit the META data block.
void EmitMetaBlock();
/// Start a DIAG block.
void EnterDiagBlock();
/// End a DIAG block.
void ExitDiagBlock();
/// Emit a DIAG record.
void EmitDiagnosticMessage(FullSourceLoc Loc, PresumedLoc PLoc,
DiagnosticsEngine::Level Level, StringRef Message,
DiagOrStoredDiag D);
/// Emit FIXIT and SOURCE_RANGE records for a diagnostic.
void EmitCodeContext(SmallVectorImpl<CharSourceRange> &Ranges,
ArrayRef<FixItHint> Hints,
const SourceManager &SM);
/// Emit a record for a CharSourceRange.
void EmitCharSourceRange(CharSourceRange R, const SourceManager &SM);
/// Emit the string information for the category.
unsigned getEmitCategory(unsigned category = 0);
/// Emit the string information for diagnostic flags.
unsigned getEmitDiagnosticFlag(DiagnosticsEngine::Level DiagLevel,
unsigned DiagID = 0);
unsigned getEmitDiagnosticFlag(StringRef DiagName);
/// Emit (lazily) the file string and retrieved the file identifier.
unsigned getEmitFile(const char *Filename);
/// Add SourceLocation information the specified record.
void AddLocToRecord(FullSourceLoc Loc, PresumedLoc PLoc,
RecordDataImpl &Record, unsigned TokSize = 0);
/// Add SourceLocation information the specified record.
void AddLocToRecord(FullSourceLoc Loc, RecordDataImpl &Record,
unsigned TokSize = 0) {
AddLocToRecord(Loc, Loc.hasManager() ? Loc.getPresumedLoc() : PresumedLoc(),
Record, TokSize);
}
/// Add CharSourceRange information the specified record.
void AddCharSourceRangeToRecord(CharSourceRange R, RecordDataImpl &Record,
const SourceManager &SM);
/// Language options, which can differ from one clone of this client
/// to another.
const LangOptions *LangOpts;
/// Whether this is the original instance (rather than one of its
/// clones), responsible for writing the file at the end.
bool OriginalInstance;
/// Whether this instance should aggregate diagnostics that are
/// generated from child processes.
bool MergeChildRecords;
/// Whether we've started finishing and tearing down this instance.
bool IsFinishing = false;
/// State that is shared among the various clones of this diagnostic
/// consumer.
struct SharedState {
SharedState(StringRef File, DiagnosticOptions *Diags)
: DiagOpts(Diags), Stream(Buffer), OutputFile(File.str()),
EmittedAnyDiagBlocks(false) {}
/// Diagnostic options.
IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts;
/// The byte buffer for the serialized content.
SmallString<1024> Buffer;
/// The BitStreamWriter for the serialized diagnostics.
llvm::BitstreamWriter Stream;
/// The name of the diagnostics file.
std::string OutputFile;
/// The set of constructed record abbreviations.
AbbreviationMap Abbrevs;
/// A utility buffer for constructing record content.
RecordData Record;
/// A text buffer for rendering diagnostic text.
SmallString<256> diagBuf;
/// The collection of diagnostic categories used.
llvm::DenseSet<unsigned> Categories;
/// The collection of files used.
llvm::DenseMap<const char *, unsigned> Files;
typedef llvm::DenseMap<const void *, std::pair<unsigned, StringRef> >
DiagFlagsTy;
/// Map for uniquing strings.
DiagFlagsTy DiagFlags;
/// Whether we have already started emission of any DIAG blocks. Once
/// this becomes \c true, we never close a DIAG block until we know that we're
/// starting another one or we're done.
bool EmittedAnyDiagBlocks;
/// Engine for emitting diagnostics about the diagnostics.
std::unique_ptr<DiagnosticsEngine> MetaDiagnostics;
};
/// State shared among the various clones of this diagnostic consumer.
std::shared_ptr<SharedState> State;
};
} // end anonymous namespace
namespace clang {
namespace serialized_diags {
std::unique_ptr<DiagnosticConsumer>
create(StringRef OutputFile, DiagnosticOptions *Diags, bool MergeChildRecords) {
return std::make_unique<SDiagsWriter>(OutputFile, Diags, MergeChildRecords);
}
} // end namespace serialized_diags
} // end namespace clang
//===----------------------------------------------------------------------===//
// Serialization methods.
//===----------------------------------------------------------------------===//
/// Emits a block ID in the BLOCKINFO block.
static void EmitBlockID(unsigned ID, const char *Name,
llvm::BitstreamWriter &Stream,
RecordDataImpl &Record) {
Record.clear();
Record.push_back(ID);
Stream.EmitRecord(llvm::bitc::BLOCKINFO_CODE_SETBID, Record);
// Emit the block name if present.
if (!Name || Name[0] == 0)
return;
Record.clear();
while (*Name)
Record.push_back(*Name++);
Stream.EmitRecord(llvm::bitc::BLOCKINFO_CODE_BLOCKNAME, Record);
}
/// Emits a record ID in the BLOCKINFO block.
static void EmitRecordID(unsigned ID, const char *Name,
llvm::BitstreamWriter &Stream,
RecordDataImpl &Record){
Record.clear();
Record.push_back(ID);
while (*Name)
Record.push_back(*Name++);
Stream.EmitRecord(llvm::bitc::BLOCKINFO_CODE_SETRECORDNAME, Record);
}
void SDiagsWriter::AddLocToRecord(FullSourceLoc Loc, PresumedLoc PLoc,
RecordDataImpl &Record, unsigned TokSize) {
if (PLoc.isInvalid()) {
// Emit a "sentinel" location.
Record.push_back((unsigned)0); // File.
Record.push_back((unsigned)0); // Line.
Record.push_back((unsigned)0); // Column.
Record.push_back((unsigned)0); // Offset.
return;
}
Record.push_back(getEmitFile(PLoc.getFilename()));
Record.push_back(PLoc.getLine());
Record.push_back(PLoc.getColumn()+TokSize);
Record.push_back(Loc.getFileOffset());
}
void SDiagsWriter::AddCharSourceRangeToRecord(CharSourceRange Range,
RecordDataImpl &Record,
const SourceManager &SM) {
AddLocToRecord(FullSourceLoc(Range.getBegin(), SM), Record);
unsigned TokSize = 0;
if (Range.isTokenRange())
TokSize = Lexer::MeasureTokenLength(Range.getEnd(),
SM, *LangOpts);
AddLocToRecord(FullSourceLoc(Range.getEnd(), SM), Record, TokSize);
}
unsigned SDiagsWriter::getEmitFile(const char *FileName){
if (!FileName)
return 0;
unsigned &entry = State->Files[FileName];
if (entry)
return entry;
// Lazily generate the record for the file.
entry = State->Files.size();
StringRef Name(FileName);
RecordData::value_type Record[] = {RECORD_FILENAME, entry, 0 /* For legacy */,
0 /* For legacy */, Name.size()};
State->Stream.EmitRecordWithBlob(State->Abbrevs.get(RECORD_FILENAME), Record,
Name);
return entry;
}
void SDiagsWriter::EmitCharSourceRange(CharSourceRange R,
const SourceManager &SM) {
State->Record.clear();
State->Record.push_back(RECORD_SOURCE_RANGE);
AddCharSourceRangeToRecord(R, State->Record, SM);
State->Stream.EmitRecordWithAbbrev(State->Abbrevs.get(RECORD_SOURCE_RANGE),
State->Record);
}
/// Emits the preamble of the diagnostics file.
void SDiagsWriter::EmitPreamble() {
// Emit the file header.
State->Stream.Emit((unsigned)'D', 8);
State->Stream.Emit((unsigned)'I', 8);
State->Stream.Emit((unsigned)'A', 8);
State->Stream.Emit((unsigned)'G', 8);
EmitBlockInfoBlock();
EmitMetaBlock();
}
static void AddSourceLocationAbbrev(llvm::BitCodeAbbrev &Abbrev) {
using namespace llvm;
Abbrev.Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 10)); // File ID.
Abbrev.Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // Line.
Abbrev.Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // Column.
Abbrev.Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // Offset;
}
static void AddRangeLocationAbbrev(llvm::BitCodeAbbrev &Abbrev) {
AddSourceLocationAbbrev(Abbrev);
AddSourceLocationAbbrev(Abbrev);
}
void SDiagsWriter::EmitBlockInfoBlock() {
State->Stream.EnterBlockInfoBlock();
using namespace llvm;
llvm::BitstreamWriter &Stream = State->Stream;
RecordData &Record = State->Record;
AbbreviationMap &Abbrevs = State->Abbrevs;
// ==---------------------------------------------------------------------==//
// The subsequent records and Abbrevs are for the "Meta" block.
// ==---------------------------------------------------------------------==//
EmitBlockID(BLOCK_META, "Meta", Stream, Record);
EmitRecordID(RECORD_VERSION, "Version", Stream, Record);
auto Abbrev = std::make_shared<BitCodeAbbrev>();
Abbrev->Add(BitCodeAbbrevOp(RECORD_VERSION));
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32));
Abbrevs.set(RECORD_VERSION, Stream.EmitBlockInfoAbbrev(BLOCK_META, Abbrev));
// ==---------------------------------------------------------------------==//
// The subsequent records and Abbrevs are for the "Diagnostic" block.
// ==---------------------------------------------------------------------==//
EmitBlockID(BLOCK_DIAG, "Diag", Stream, Record);
EmitRecordID(RECORD_DIAG, "DiagInfo", Stream, Record);
EmitRecordID(RECORD_SOURCE_RANGE, "SrcRange", Stream, Record);
EmitRecordID(RECORD_CATEGORY, "CatName", Stream, Record);
EmitRecordID(RECORD_DIAG_FLAG, "DiagFlag", Stream, Record);
EmitRecordID(RECORD_FILENAME, "FileName", Stream, Record);
EmitRecordID(RECORD_FIXIT, "FixIt", Stream, Record);
// Emit abbreviation for RECORD_DIAG.
Abbrev = std::make_shared<BitCodeAbbrev>();
Abbrev->Add(BitCodeAbbrevOp(RECORD_DIAG));
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 3)); // Diag level.
AddSourceLocationAbbrev(*Abbrev);
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 10)); // Category.
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 10)); // Mapped Diag ID.
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::VBR, 16)); // Text size.
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Diagnostc text.
Abbrevs.set(RECORD_DIAG, Stream.EmitBlockInfoAbbrev(BLOCK_DIAG, Abbrev));
// Emit abbreviation for RECORD_CATEGORY.
Abbrev = std::make_shared<BitCodeAbbrev>();
Abbrev->Add(BitCodeAbbrevOp(RECORD_CATEGORY));
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // Category ID.
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 8)); // Text size.
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Category text.
Abbrevs.set(RECORD_CATEGORY, Stream.EmitBlockInfoAbbrev(BLOCK_DIAG, Abbrev));
// Emit abbreviation for RECORD_SOURCE_RANGE.
Abbrev = std::make_shared<BitCodeAbbrev>();
Abbrev->Add(BitCodeAbbrevOp(RECORD_SOURCE_RANGE));
AddRangeLocationAbbrev(*Abbrev);
Abbrevs.set(RECORD_SOURCE_RANGE,
Stream.EmitBlockInfoAbbrev(BLOCK_DIAG, Abbrev));
// Emit the abbreviation for RECORD_DIAG_FLAG.
Abbrev = std::make_shared<BitCodeAbbrev>();
Abbrev->Add(BitCodeAbbrevOp(RECORD_DIAG_FLAG));
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 10)); // Mapped Diag ID.
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // Text size.
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // Flag name text.
Abbrevs.set(RECORD_DIAG_FLAG, Stream.EmitBlockInfoAbbrev(BLOCK_DIAG,
Abbrev));
// Emit the abbreviation for RECORD_FILENAME.
Abbrev = std::make_shared<BitCodeAbbrev>();
Abbrev->Add(BitCodeAbbrevOp(RECORD_FILENAME));
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 10)); // Mapped file ID.
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // Size.
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 32)); // Modification time.
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // Text size.
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // File name text.
Abbrevs.set(RECORD_FILENAME, Stream.EmitBlockInfoAbbrev(BLOCK_DIAG,
Abbrev));
// Emit the abbreviation for RECORD_FIXIT.
Abbrev = std::make_shared<BitCodeAbbrev>();
Abbrev->Add(BitCodeAbbrevOp(RECORD_FIXIT));
AddRangeLocationAbbrev(*Abbrev);
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed, 16)); // Text size.
Abbrev->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Blob)); // FixIt text.
Abbrevs.set(RECORD_FIXIT, Stream.EmitBlockInfoAbbrev(BLOCK_DIAG,
Abbrev));
Stream.ExitBlock();
}
void SDiagsWriter::EmitMetaBlock() {
llvm::BitstreamWriter &Stream = State->Stream;
AbbreviationMap &Abbrevs = State->Abbrevs;
Stream.EnterSubblock(BLOCK_META, 3);
RecordData::value_type Record[] = {RECORD_VERSION, VersionNumber};
Stream.EmitRecordWithAbbrev(Abbrevs.get(RECORD_VERSION), Record);
Stream.ExitBlock();
}
unsigned SDiagsWriter::getEmitCategory(unsigned int category) {
if (!State->Categories.insert(category).second)
return category;
// We use a local version of 'Record' so that we can be generating
// another record when we lazily generate one for the category entry.
StringRef catName = DiagnosticIDs::getCategoryNameFromID(category);
RecordData::value_type Record[] = {RECORD_CATEGORY, category, catName.size()};
State->Stream.EmitRecordWithBlob(State->Abbrevs.get(RECORD_CATEGORY), Record,
catName);
return category;
}
unsigned SDiagsWriter::getEmitDiagnosticFlag(DiagnosticsEngine::Level DiagLevel,
unsigned DiagID) {
if (DiagLevel == DiagnosticsEngine::Note)
return 0; // No flag for notes.
StringRef FlagName = DiagnosticIDs::getWarningOptionForDiag(DiagID);
return getEmitDiagnosticFlag(FlagName);
}
unsigned SDiagsWriter::getEmitDiagnosticFlag(StringRef FlagName) {
if (FlagName.empty())
return 0;
// Here we assume that FlagName points to static data whose pointer
// value is fixed. This allows us to unique by diagnostic groups.
const void *data = FlagName.data();
std::pair<unsigned, StringRef> &entry = State->DiagFlags[data];
if (entry.first == 0) {
entry.first = State->DiagFlags.size();
entry.second = FlagName;
// Lazily emit the string in a separate record.
RecordData::value_type Record[] = {RECORD_DIAG_FLAG, entry.first,
FlagName.size()};
State->Stream.EmitRecordWithBlob(State->Abbrevs.get(RECORD_DIAG_FLAG),
Record, FlagName);
}
return entry.first;
}
void SDiagsWriter::HandleDiagnostic(DiagnosticsEngine::Level DiagLevel,
const Diagnostic &Info) {
assert(!IsFinishing &&
"Received a diagnostic after we've already started teardown.");
if (IsFinishing) {
SmallString<256> diagnostic;
Info.FormatDiagnostic(diagnostic);
getMetaDiags()->Report(
diag::warn_fe_serialized_diag_failure_during_finalisation)
<< diagnostic;
return;
}
// Enter the block for a non-note diagnostic immediately, rather than waiting
// for beginDiagnostic, in case associated notes are emitted before we get
// there.
if (DiagLevel != DiagnosticsEngine::Note) {
if (State->EmittedAnyDiagBlocks)
ExitDiagBlock();
EnterDiagBlock();
State->EmittedAnyDiagBlocks = true;
}
// Compute the diagnostic text.
State->diagBuf.clear();
Info.FormatDiagnostic(State->diagBuf);
if (Info.getLocation().isInvalid()) {
// Special-case diagnostics with no location. We may not have entered a
// source file in this case, so we can't use the normal DiagnosticsRenderer
// machinery.
// Make sure we bracket all notes as "sub-diagnostics". This matches
// the behavior in SDiagsRenderer::emitDiagnostic().
if (DiagLevel == DiagnosticsEngine::Note)
EnterDiagBlock();
EmitDiagnosticMessage(FullSourceLoc(), PresumedLoc(), DiagLevel,
State->diagBuf, &Info);
if (DiagLevel == DiagnosticsEngine::Note)
ExitDiagBlock();
return;
}
assert(Info.hasSourceManager() && LangOpts &&
"Unexpected diagnostic with valid location outside of a source file");
SDiagsRenderer Renderer(*this, *LangOpts, &*State->DiagOpts);
Renderer.emitDiagnostic(
FullSourceLoc(Info.getLocation(), Info.getSourceManager()), DiagLevel,
State->diagBuf, Info.getRanges(), Info.getFixItHints(), &Info);
}
static serialized_diags::Level getStableLevel(DiagnosticsEngine::Level Level) {
switch (Level) {
#define CASE(X) case DiagnosticsEngine::X: return serialized_diags::X;
CASE(Ignored)
CASE(Note)
CASE(Remark)
CASE(Warning)
CASE(Error)
CASE(Fatal)
#undef CASE
}
llvm_unreachable("invalid diagnostic level");
}
void SDiagsWriter::EmitDiagnosticMessage(FullSourceLoc Loc, PresumedLoc PLoc,
DiagnosticsEngine::Level Level,
StringRef Message,
DiagOrStoredDiag D) {
llvm::BitstreamWriter &Stream = State->Stream;
RecordData &Record = State->Record;
AbbreviationMap &Abbrevs = State->Abbrevs;
// Emit the RECORD_DIAG record.
Record.clear();
Record.push_back(RECORD_DIAG);
Record.push_back(getStableLevel(Level));
AddLocToRecord(Loc, PLoc, Record);
if (const Diagnostic *Info = D.dyn_cast<const Diagnostic*>()) {
// Emit the category string lazily and get the category ID.
unsigned DiagID = DiagnosticIDs::getCategoryNumberForDiag(Info->getID());
Record.push_back(getEmitCategory(DiagID));
// Emit the diagnostic flag string lazily and get the mapped ID.
Record.push_back(getEmitDiagnosticFlag(Level, Info->getID()));
} else {
Record.push_back(getEmitCategory());
Record.push_back(getEmitDiagnosticFlag(Level));
}
Record.push_back(Message.size());
Stream.EmitRecordWithBlob(Abbrevs.get(RECORD_DIAG), Record, Message);
}
void SDiagsRenderer::emitDiagnosticMessage(
FullSourceLoc Loc, PresumedLoc PLoc, DiagnosticsEngine::Level Level,
StringRef Message, ArrayRef<clang::CharSourceRange> Ranges,
DiagOrStoredDiag D) {
Writer.EmitDiagnosticMessage(Loc, PLoc, Level, Message, D);
}
void SDiagsWriter::EnterDiagBlock() {
State->Stream.EnterSubblock(BLOCK_DIAG, 4);
}
void SDiagsWriter::ExitDiagBlock() {
State->Stream.ExitBlock();
}
void SDiagsRenderer::beginDiagnostic(DiagOrStoredDiag D,
DiagnosticsEngine::Level Level) {
if (Level == DiagnosticsEngine::Note)
Writer.EnterDiagBlock();
}
void SDiagsRenderer::endDiagnostic(DiagOrStoredDiag D,
DiagnosticsEngine::Level Level) {
// Only end note diagnostics here, because we can't be sure when we've seen
// the last note associated with a non-note diagnostic.
if (Level == DiagnosticsEngine::Note)
Writer.ExitDiagBlock();
}
void SDiagsWriter::EmitCodeContext(SmallVectorImpl<CharSourceRange> &Ranges,
ArrayRef<FixItHint> Hints,
const SourceManager &SM) {
llvm::BitstreamWriter &Stream = State->Stream;
RecordData &Record = State->Record;
AbbreviationMap &Abbrevs = State->Abbrevs;
// Emit Source Ranges.
for (ArrayRef<CharSourceRange>::iterator I = Ranges.begin(), E = Ranges.end();
I != E; ++I)
if (I->isValid())
EmitCharSourceRange(*I, SM);
// Emit FixIts.
for (ArrayRef<FixItHint>::iterator I = Hints.begin(), E = Hints.end();
I != E; ++I) {
const FixItHint &Fix = *I;
if (Fix.isNull())
continue;
Record.clear();
Record.push_back(RECORD_FIXIT);
AddCharSourceRangeToRecord(Fix.RemoveRange, Record, SM);
Record.push_back(Fix.CodeToInsert.size());
Stream.EmitRecordWithBlob(Abbrevs.get(RECORD_FIXIT), Record,
Fix.CodeToInsert);
}
}
void SDiagsRenderer::emitCodeContext(FullSourceLoc Loc,
DiagnosticsEngine::Level Level,
SmallVectorImpl<CharSourceRange> &Ranges,
ArrayRef<FixItHint> Hints) {
Writer.EmitCodeContext(Ranges, Hints, Loc.getManager());
}
void SDiagsRenderer::emitNote(FullSourceLoc Loc, StringRef Message) {
Writer.EnterDiagBlock();
PresumedLoc PLoc = Loc.hasManager() ? Loc.getPresumedLoc() : PresumedLoc();
Writer.EmitDiagnosticMessage(Loc, PLoc, DiagnosticsEngine::Note, Message,
DiagOrStoredDiag());
Writer.ExitDiagBlock();
}
DiagnosticsEngine *SDiagsWriter::getMetaDiags() {
// FIXME: It's slightly absurd to create a new diagnostics engine here, but
// the other options that are available today are worse:
//
// 1. Teach DiagnosticsConsumers to emit diagnostics to the engine they are a
// part of. The DiagnosticsEngine would need to know not to send
// diagnostics back to the consumer that failed. This would require us to
// rework ChainedDiagnosticsConsumer and teach the engine about multiple
// consumers, which is difficult today because most APIs interface with
// consumers rather than the engine itself.
//
// 2. Pass a DiagnosticsEngine to SDiagsWriter on creation - this would need
// to be distinct from the engine the writer was being added to and would
// normally not be used.
if (!State->MetaDiagnostics) {
IntrusiveRefCntPtr<DiagnosticIDs> IDs(new DiagnosticIDs());
auto Client =
new TextDiagnosticPrinter(llvm::errs(), State->DiagOpts.get());
State->MetaDiagnostics = std::make_unique<DiagnosticsEngine>(
IDs, State->DiagOpts.get(), Client);
}
return State->MetaDiagnostics.get();
}
void SDiagsWriter::RemoveOldDiagnostics() {
if (!llvm::sys::fs::remove(State->OutputFile))
return;
getMetaDiags()->Report(diag::warn_fe_serialized_diag_merge_failure);
// Disable merging child records, as whatever is in this file may be
// misleading.
MergeChildRecords = false;
}
void SDiagsWriter::finish() {
assert(!IsFinishing);
IsFinishing = true;
// The original instance is responsible for writing the file.
if (!OriginalInstance)
return;
// Finish off any diagnostic we were in the process of emitting.
if (State->EmittedAnyDiagBlocks)
ExitDiagBlock();
if (MergeChildRecords) {
if (!State->EmittedAnyDiagBlocks)
// We have no diagnostics of our own, so we can just leave the child
// process' output alone
return;
if (llvm::sys::fs::exists(State->OutputFile))
if (SDiagsMerger(*this).mergeRecordsFromFile(State->OutputFile.c_str()))
getMetaDiags()->Report(diag::warn_fe_serialized_diag_merge_failure);
}
std::error_code EC;
auto OS = std::make_unique<llvm::raw_fd_ostream>(State->OutputFile.c_str(),
EC, llvm::sys::fs::OF_None);
if (EC) {
getMetaDiags()->Report(diag::warn_fe_serialized_diag_failure)
<< State->OutputFile << EC.message();
OS->clear_error();
return;
}
// Write the generated bitstream to "Out".
OS->write((char *)&State->Buffer.front(), State->Buffer.size());
OS->flush();
assert(!OS->has_error());
if (OS->has_error()) {
getMetaDiags()->Report(diag::warn_fe_serialized_diag_failure)
<< State->OutputFile << OS->error().message();
OS->clear_error();
}
}
std::error_code SDiagsMerger::visitStartOfDiagnostic() {
Writer.EnterDiagBlock();
return std::error_code();
}
std::error_code SDiagsMerger::visitEndOfDiagnostic() {
Writer.ExitDiagBlock();
return std::error_code();
}
std::error_code
SDiagsMerger::visitSourceRangeRecord(const serialized_diags::Location &Start,
const serialized_diags::Location &End) {
RecordData::value_type Record[] = {
RECORD_SOURCE_RANGE, FileLookup[Start.FileID], Start.Line, Start.Col,
Start.Offset, FileLookup[End.FileID], End.Line, End.Col, End.Offset};
Writer.State->Stream.EmitRecordWithAbbrev(
Writer.State->Abbrevs.get(RECORD_SOURCE_RANGE), Record);
return std::error_code();
}
std::error_code SDiagsMerger::visitDiagnosticRecord(
unsigned Severity, const serialized_diags::Location &Location,
unsigned Category, unsigned Flag, StringRef Message) {
RecordData::value_type Record[] = {
RECORD_DIAG, Severity, FileLookup[Location.FileID], Location.Line,
Location.Col, Location.Offset, CategoryLookup[Category],
Flag ? DiagFlagLookup[Flag] : 0, Message.size()};
Writer.State->Stream.EmitRecordWithBlob(
Writer.State->Abbrevs.get(RECORD_DIAG), Record, Message);
return std::error_code();
}
std::error_code
SDiagsMerger::visitFixitRecord(const serialized_diags::Location &Start,
const serialized_diags::Location &End,
StringRef Text) {
RecordData::value_type Record[] = {RECORD_FIXIT, FileLookup[Start.FileID],
Start.Line, Start.Col, Start.Offset,
FileLookup[End.FileID], End.Line, End.Col,
End.Offset, Text.size()};
Writer.State->Stream.EmitRecordWithBlob(
Writer.State->Abbrevs.get(RECORD_FIXIT), Record, Text);
return std::error_code();
}
std::error_code SDiagsMerger::visitFilenameRecord(unsigned ID, unsigned Size,
unsigned Timestamp,
StringRef Name) {
FileLookup[ID] = Writer.getEmitFile(Name.str().c_str());
return std::error_code();
}
std::error_code SDiagsMerger::visitCategoryRecord(unsigned ID, StringRef Name) {
CategoryLookup[ID] = Writer.getEmitCategory(ID);
return std::error_code();
}
std::error_code SDiagsMerger::visitDiagFlagRecord(unsigned ID, StringRef Name) {
DiagFlagLookup[ID] = Writer.getEmitDiagnosticFlag(Name);
return std::error_code();
}