maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/clang/tools/libclang/CXLoadedDiagnostic.cpp

673 lines
22 KiB
C++
Raw Blame History

/*===-- CXLoadedDiagnostic.cpp - Handling of persisent diags -*- C++ -*-===*\
|* *|
|* The LLVM Compiler Infrastructure *|
|* *|
|* This file is distributed under the University of Illinois Open Source *|
|* License. See LICENSE.TXT for details. *|
|* *|
|*===----------------------------------------------------------------------===*|
|* *|
|* Implements handling of persisent diagnostics. *|
|* *|
\*===----------------------------------------------------------------------===*/
#include "CXLoadedDiagnostic.h"
#include "CXString.h"
#include "clang/Basic/Diagnostic.h"
#include "clang/Basic/FileManager.h"
#include "clang/Frontend/SerializedDiagnosticPrinter.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/Twine.h"
#include "llvm/ADT/Optional.h"
#include "clang/Basic/LLVM.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Bitcode/BitstreamReader.h"
#include "llvm/Support/MemoryBuffer.h"
#include <assert.h>
using namespace clang;
using namespace clang::cxstring;
//===----------------------------------------------------------------------===//
// Extend CXDiagnosticSetImpl which contains strings for diagnostics.
//===----------------------------------------------------------------------===//
typedef llvm::DenseMap<unsigned, llvm::StringRef> Strings;
namespace {
class CXLoadedDiagnosticSetImpl : public CXDiagnosticSetImpl {
public:
CXLoadedDiagnosticSetImpl() : CXDiagnosticSetImpl(true), FakeFiles(FO) {}
virtual ~CXLoadedDiagnosticSetImpl() {}
llvm::StringRef makeString(const char *blob, unsigned blobLen);
llvm::BumpPtrAllocator Alloc;
Strings Categories;
Strings WarningFlags;
Strings FileNames;
FileSystemOptions FO;
FileManager FakeFiles;
llvm::DenseMap<unsigned, const FileEntry *> Files;
};
}
llvm::StringRef CXLoadedDiagnosticSetImpl::makeString(const char *blob,
unsigned bloblen) {
char *mem = Alloc.Allocate<char>(bloblen + 1);
memcpy(mem, blob, bloblen);
// Add a null terminator for those clients accessing the buffer
// like a c-string.
mem[bloblen] = '\0';
return llvm::StringRef(mem, bloblen);
}
//===----------------------------------------------------------------------===//
// Cleanup.
//===----------------------------------------------------------------------===//
CXLoadedDiagnostic::~CXLoadedDiagnostic() {}
//===----------------------------------------------------------------------===//
// Public CXLoadedDiagnostic methods.
//===----------------------------------------------------------------------===//
CXDiagnosticSeverity CXLoadedDiagnostic::getSeverity() const {
// FIXME: possibly refactor with logic in CXStoredDiagnostic.
switch (severity) {
case DiagnosticsEngine::Ignored: return CXDiagnostic_Ignored;
case DiagnosticsEngine::Note: return CXDiagnostic_Note;
case DiagnosticsEngine::Warning: return CXDiagnostic_Warning;
case DiagnosticsEngine::Error: return CXDiagnostic_Error;
case DiagnosticsEngine::Fatal: return CXDiagnostic_Fatal;
}
llvm_unreachable("Invalid diagnostic level");
}
static CXSourceLocation makeLocation(const CXLoadedDiagnostic::Location *DLoc) {
// The lowest bit of ptr_data[0] is always set to 1 to indicate this
// is a persistent diagnostic.
uintptr_t V = (uintptr_t) DLoc;
V |= 0x1;
CXSourceLocation Loc = { { (void*) V, 0 }, 0 };
return Loc;
}
CXSourceLocation CXLoadedDiagnostic::getLocation() const {
// The lowest bit of ptr_data[0] is always set to 1 to indicate this
// is a persistent diagnostic.
return makeLocation(&DiagLoc);
}
CXString CXLoadedDiagnostic::getSpelling() const {
return cxstring::createCXString(Spelling, false);
}
CXString CXLoadedDiagnostic::getDiagnosticOption(CXString *Disable) const {
if (DiagOption.empty())
return createCXString("");
// FIXME: possibly refactor with logic in CXStoredDiagnostic.
if (Disable)
*Disable = createCXString((Twine("-Wno-") + DiagOption).str());
return createCXString((Twine("-W") + DiagOption).str());
}
unsigned CXLoadedDiagnostic::getCategory() const {
return category;
}
CXString CXLoadedDiagnostic::getCategoryText() const {
return cxstring::createCXString(CategoryText);
}
unsigned CXLoadedDiagnostic::getNumRanges() const {
return Ranges.size();
}
CXSourceRange CXLoadedDiagnostic::getRange(unsigned Range) const {
assert(Range < Ranges.size());
return Ranges[Range];
}
unsigned CXLoadedDiagnostic::getNumFixIts() const {
return FixIts.size();
}
CXString CXLoadedDiagnostic::getFixIt(unsigned FixIt,
CXSourceRange *ReplacementRange) const {
assert(FixIt < FixIts.size());
if (ReplacementRange)
*ReplacementRange = FixIts[FixIt].first;
return FixIts[FixIt].second;
}
void CXLoadedDiagnostic::decodeLocation(CXSourceLocation location,
CXFile *file,
unsigned int *line,
unsigned int *column,
unsigned int *offset) {
// CXSourceLocation consists of the following fields:
//
// void *ptr_data[2];
// unsigned int_data;
//
// The lowest bit of ptr_data[0] is always set to 1 to indicate this
// is a persistent diagnostic.
//
// For now, do the unoptimized approach and store the data in a side
// data structure. We can optimize this case later.
uintptr_t V = (uintptr_t) location.ptr_data[0];
assert((V & 0x1) == 1);
V &= ~(uintptr_t)1;
const Location &Loc = *((Location*)V);
if (file)
*file = Loc.file;
if (line)
*line = Loc.line;
if (column)
*column = Loc.column;
if (offset)
*offset = Loc.offset;
}
//===----------------------------------------------------------------------===//
// Deserialize diagnostics.
//===----------------------------------------------------------------------===//
enum { MaxSupportedVersion = 1 };
typedef SmallVector<uint64_t, 64> RecordData;
enum LoadResult { Failure = 1, Success = 0 };
enum StreamResult { Read_EndOfStream,
Read_BlockBegin,
Read_Failure,
Read_Record,
Read_BlockEnd };
namespace {
class DiagLoader {
enum CXLoadDiag_Error *error;
CXString *errorString;
void reportBad(enum CXLoadDiag_Error code, llvm::StringRef err) {
if (error)
*error = code;
if (errorString)
*errorString = createCXString(err);
}
void reportInvalidFile(llvm::StringRef err) {
return reportBad(CXLoadDiag_InvalidFile, err);
}
LoadResult readMetaBlock(llvm::BitstreamCursor &Stream);
LoadResult readDiagnosticBlock(llvm::BitstreamCursor &Stream,
CXDiagnosticSetImpl &Diags,
CXLoadedDiagnosticSetImpl &TopDiags);
StreamResult readToNextRecordOrBlock(llvm::BitstreamCursor &Stream,
llvm::StringRef errorContext,
unsigned &BlockOrRecordID,
const bool atTopLevel = false);
LoadResult readString(CXLoadedDiagnosticSetImpl &TopDiags,
Strings &strings, llvm::StringRef errorContext,
RecordData &Record,
const char *BlobStart,
unsigned BlobLen,
bool allowEmptyString = false);
LoadResult readString(CXLoadedDiagnosticSetImpl &TopDiags,
llvm::StringRef &RetStr,
llvm::StringRef errorContext,
RecordData &Record,
const char *BlobStart,
unsigned BlobLen,
bool allowEmptyString = false);
LoadResult readRange(CXLoadedDiagnosticSetImpl &TopDiags,
RecordData &Record, unsigned RecStartIdx,
CXSourceRange &SR);
LoadResult readLocation(CXLoadedDiagnosticSetImpl &TopDiags,
RecordData &Record, unsigned &offset,
CXLoadedDiagnostic::Location &Loc);
public:
DiagLoader(enum CXLoadDiag_Error *e, CXString *es)
: error(e), errorString(es) {
if (error)
*error = CXLoadDiag_None;
if (errorString)
*errorString = createCXString("");
}
CXDiagnosticSet load(const char *file);
};
}
CXDiagnosticSet DiagLoader::load(const char *file) {
// Open the diagnostics file.
std::string ErrStr;
FileSystemOptions FO;
FileManager FileMgr(FO);
OwningPtr<llvm::MemoryBuffer> Buffer;
Buffer.reset(FileMgr.getBufferForFile(file));
if (!Buffer) {
reportBad(CXLoadDiag_CannotLoad, ErrStr);
return 0;
}
llvm::BitstreamReader StreamFile;
StreamFile.init((const unsigned char *)Buffer->getBufferStart(),
(const unsigned char *)Buffer->getBufferEnd());
llvm::BitstreamCursor Stream;
Stream.init(StreamFile);
// Sniff for the signature.
if (Stream.Read(8) != 'D' ||
Stream.Read(8) != 'I' ||
Stream.Read(8) != 'A' ||
Stream.Read(8) != 'G') {
reportBad(CXLoadDiag_InvalidFile,
"Bad header in diagnostics file");
return 0;
}
OwningPtr<CXLoadedDiagnosticSetImpl>
Diags(new CXLoadedDiagnosticSetImpl());
while (true) {
unsigned BlockID = 0;
StreamResult Res = readToNextRecordOrBlock(Stream, "Top-level",
BlockID, true);
switch (Res) {
case Read_EndOfStream:
return (CXDiagnosticSet) Diags.take();
case Read_Failure:
return 0;
case Read_Record:
llvm_unreachable("Top-level does not have records");
case Read_BlockEnd:
continue;
case Read_BlockBegin:
break;
}
switch (BlockID) {
case serialized_diags::BLOCK_META:
if (readMetaBlock(Stream))
return 0;
break;
case serialized_diags::BLOCK_DIAG:
if (readDiagnosticBlock(Stream, *Diags.get(), *Diags.get()))
return 0;
break;
default:
if (!Stream.SkipBlock()) {
reportInvalidFile("Malformed block at top-level of diagnostics file");
return 0;
}
break;
}
}
}
StreamResult DiagLoader::readToNextRecordOrBlock(llvm::BitstreamCursor &Stream,
llvm::StringRef errorContext,
unsigned &blockOrRecordID,
const bool atTopLevel) {
blockOrRecordID = 0;
while (!Stream.AtEndOfStream()) {
unsigned Code = Stream.ReadCode();
// Handle the top-level specially.
if (atTopLevel) {
if (Code == llvm::bitc::ENTER_SUBBLOCK) {
unsigned BlockID = Stream.ReadSubBlockID();
if (BlockID == llvm::bitc::BLOCKINFO_BLOCK_ID) {
if (Stream.ReadBlockInfoBlock()) {
reportInvalidFile("Malformed BlockInfoBlock in diagnostics file");
return Read_Failure;
}
continue;
}
blockOrRecordID = BlockID;
return Read_BlockBegin;
}
reportInvalidFile("Only blocks can appear at the top of a "
"diagnostic file");
return Read_Failure;
}
switch ((llvm::bitc::FixedAbbrevIDs)Code) {
case llvm::bitc::ENTER_SUBBLOCK:
blockOrRecordID = Stream.ReadSubBlockID();
return Read_BlockBegin;
case llvm::bitc::END_BLOCK:
if (Stream.ReadBlockEnd()) {
reportInvalidFile("Cannot read end of block");
return Read_Failure;
}
return Read_BlockEnd;
case llvm::bitc::DEFINE_ABBREV:
Stream.ReadAbbrevRecord();
continue;
case llvm::bitc::UNABBREV_RECORD:
reportInvalidFile("Diagnostics file should have no unabbreviated "
"records");
return Read_Failure;
default:
// We found a record.
blockOrRecordID = Code;
return Read_Record;
}
}
if (atTopLevel)
return Read_EndOfStream;
reportInvalidFile(Twine("Premature end of diagnostics file within ").str() +
errorContext.str());
return Read_Failure;
}
LoadResult DiagLoader::readMetaBlock(llvm::BitstreamCursor &Stream) {
if (Stream.EnterSubBlock(clang::serialized_diags::BLOCK_META)) {
reportInvalidFile("Malformed metadata block");
return Failure;
}
bool versionChecked = false;
while (true) {
unsigned blockOrCode = 0;
StreamResult Res = readToNextRecordOrBlock(Stream, "Metadata Block",
blockOrCode);
switch(Res) {
case Read_EndOfStream:
llvm_unreachable("EndOfStream handled by readToNextRecordOrBlock");
case Read_Failure:
return Failure;
case Read_Record:
break;
case Read_BlockBegin:
if (Stream.SkipBlock()) {
reportInvalidFile("Malformed metadata block");
return Failure;
}
case Read_BlockEnd:
if (!versionChecked) {
reportInvalidFile("Diagnostics file does not contain version"
" information");
return Failure;
}
return Success;
}
RecordData Record;
const char *Blob;
unsigned BlobLen;
unsigned recordID = Stream.ReadRecord(blockOrCode, Record, &Blob, &BlobLen);
if (recordID == serialized_diags::RECORD_VERSION) {
if (Record.size() < 1) {
reportInvalidFile("malformed VERSION identifier in diagnostics file");
return Failure;
}
if (Record[0] > MaxSupportedVersion) {
reportInvalidFile("diagnosics file is a newer version than the one "
"supported");
return Failure;
}
versionChecked = true;
}
}
}
LoadResult DiagLoader::readString(CXLoadedDiagnosticSetImpl &TopDiags,
llvm::StringRef &RetStr,
llvm::StringRef errorContext,
RecordData &Record,
const char *BlobStart,
unsigned BlobLen,
bool allowEmptyString) {
// Basic buffer overflow check.
if (BlobLen > 65536) {
reportInvalidFile(std::string("Out-of-bounds string in ") +
std::string(errorContext));
return Failure;
}
if (allowEmptyString && Record.size() >= 1 && BlobLen == 0) {
RetStr = "";
return Success;
}
if (Record.size() < 1 || BlobLen == 0) {
reportInvalidFile(std::string("Corrupted ") + std::string(errorContext)
+ std::string(" entry"));
return Failure;
}
RetStr = TopDiags.makeString(BlobStart, BlobLen);
return Success;
}
LoadResult DiagLoader::readString(CXLoadedDiagnosticSetImpl &TopDiags,
Strings &strings,
llvm::StringRef errorContext,
RecordData &Record,
const char *BlobStart,
unsigned BlobLen,
bool allowEmptyString) {
llvm::StringRef RetStr;
if (readString(TopDiags, RetStr, errorContext, Record, BlobStart, BlobLen,
allowEmptyString))
return Failure;
strings[Record[0]] = RetStr;
return Success;
}
LoadResult DiagLoader::readLocation(CXLoadedDiagnosticSetImpl &TopDiags,
RecordData &Record, unsigned &offset,
CXLoadedDiagnostic::Location &Loc) {
if (Record.size() < offset + 3) {
reportInvalidFile("Corrupted source location");
return Failure;
}
unsigned fileID = Record[offset++];
if (fileID == 0) {
// Sentinel value.
Loc.file = 0;
Loc.line = 0;
Loc.column = 0;
Loc.offset = 0;
return Success;
}
const FileEntry *FE = TopDiags.Files[fileID];
if (!FE) {
reportInvalidFile("Corrupted file entry in source location");
return Failure;
}
Loc.file = (void*) FE;
Loc.line = Record[offset++];
Loc.column = Record[offset++];
Loc.offset = Record[offset++];
return Success;
}
LoadResult DiagLoader::readRange(CXLoadedDiagnosticSetImpl &TopDiags,
RecordData &Record,
unsigned int RecStartIdx,
CXSourceRange &SR) {
CXLoadedDiagnostic::Location *Start, *End;
Start = TopDiags.Alloc.Allocate<CXLoadedDiagnostic::Location>();
End = TopDiags.Alloc.Allocate<CXLoadedDiagnostic::Location>();
if (readLocation(TopDiags, Record, RecStartIdx, *Start))
return Failure;
if (readLocation(TopDiags, Record, RecStartIdx, *End))
return Failure;
CXSourceLocation startLoc = makeLocation(Start);
CXSourceLocation endLoc = makeLocation(End);
SR = clang_getRange(startLoc, endLoc);
return Success;
}
LoadResult DiagLoader::readDiagnosticBlock(llvm::BitstreamCursor &Stream,
CXDiagnosticSetImpl &Diags,
CXLoadedDiagnosticSetImpl &TopDiags){
if (Stream.EnterSubBlock(clang::serialized_diags::BLOCK_DIAG)) {
reportInvalidFile("malformed diagnostic block");
return Failure;
}
OwningPtr<CXLoadedDiagnostic> D(new CXLoadedDiagnostic());
RecordData Record;
while (true) {
unsigned blockOrCode = 0;
StreamResult Res = readToNextRecordOrBlock(Stream, "Diagnostic Block",
blockOrCode);
switch (Res) {
case Read_EndOfStream:
llvm_unreachable("EndOfStream handled in readToNextRecordOrBlock");
case Read_Failure:
return Failure;
case Read_BlockBegin: {
// The only blocks we care about are subdiagnostics.
if (blockOrCode != serialized_diags::BLOCK_DIAG) {
if (!Stream.SkipBlock()) {
reportInvalidFile("Invalid subblock in Diagnostics block");
return Failure;
}
} else if (readDiagnosticBlock(Stream, D->getChildDiagnostics(),
TopDiags)) {
return Failure;
}
continue;
}
case Read_BlockEnd:
Diags.appendDiagnostic(D.take());
return Success;
case Read_Record:
break;
}
// Read the record.
Record.clear();
const char *BlobStart = 0;
unsigned BlobLen = 0;
unsigned recID = Stream.ReadRecord(blockOrCode, Record,
BlobStart, BlobLen);
if (recID < serialized_diags::RECORD_FIRST ||
recID > serialized_diags::RECORD_LAST)
continue;
switch ((serialized_diags::RecordIDs)recID) {
case serialized_diags::RECORD_VERSION:
continue;
case serialized_diags::RECORD_CATEGORY:
if (readString(TopDiags, TopDiags.Categories, "category", Record,
BlobStart, BlobLen,
/* allowEmptyString */ true))
return Failure;
continue;
case serialized_diags::RECORD_DIAG_FLAG:
if (readString(TopDiags, TopDiags.WarningFlags, "warning flag", Record,
BlobStart, BlobLen))
return Failure;
continue;
case serialized_diags::RECORD_FILENAME: {
if (readString(TopDiags, TopDiags.FileNames, "filename", Record,
BlobStart, BlobLen))
return Failure;
if (Record.size() < 3) {
reportInvalidFile("Invalid file entry");
return Failure;
}
const FileEntry *FE =
TopDiags.FakeFiles.getVirtualFile(TopDiags.FileNames[Record[0]],
/* size */ Record[1],
/* time */ Record[2]);
TopDiags.Files[Record[0]] = FE;
continue;
}
case serialized_diags::RECORD_SOURCE_RANGE: {
CXSourceRange SR;
if (readRange(TopDiags, Record, 0, SR))
return Failure;
D->Ranges.push_back(SR);
continue;
}
case serialized_diags::RECORD_FIXIT: {
CXSourceRange SR;
if (readRange(TopDiags, Record, 0, SR))
return Failure;
llvm::StringRef RetStr;
if (readString(TopDiags, RetStr, "FIXIT", Record, BlobStart, BlobLen,
/* allowEmptyString */ true))
return Failure;
D->FixIts.push_back(std::make_pair(SR, createCXString(RetStr, false)));
continue;
}
case serialized_diags::RECORD_DIAG: {
D->severity = Record[0];
unsigned offset = 1;
if (readLocation(TopDiags, Record, offset, D->DiagLoc))
return Failure;
D->category = Record[offset++];
unsigned diagFlag = Record[offset++];
D->DiagOption = diagFlag ? TopDiags.WarningFlags[diagFlag] : "";
D->CategoryText = D->category ? TopDiags.Categories[D->category] : "";
D->Spelling = TopDiags.makeString(BlobStart, BlobLen);
continue;
}
}
}
}
extern "C" {
CXDiagnosticSet clang_loadDiagnostics(const char *file,
enum CXLoadDiag_Error *error,
CXString *errorString) {
DiagLoader L(error, errorString);
return L.load(file);
}
} // end extern 'C'.
Reference in New Issue View Git Blame Copy Permalink