| //===--- TextDiagnosticPrinter.cpp - Diagnostic Printer -------------------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This diagnostic client prints out their diagnostic messages. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "clang/Frontend/TextDiagnosticPrinter.h" |
| #include "clang/Basic/SourceManager.h" |
| #include "clang/Lex/Lexer.h" |
| #include "llvm/Support/raw_ostream.h" |
| #include "llvm/ADT/SmallString.h" |
| #include <algorithm> |
| using namespace clang; |
| |
| void TextDiagnosticPrinter:: |
| PrintIncludeStack(SourceLocation Loc, const SourceManager &SM) { |
| if (Loc.isInvalid()) return; |
| |
| PresumedLoc PLoc = SM.getPresumedLoc(Loc); |
| |
| // Print out the other include frames first. |
| PrintIncludeStack(PLoc.getIncludeLoc(), SM); |
| |
| if (ShowLocation) |
| OS << "In file included from " << PLoc.getFilename() |
| << ':' << PLoc.getLine() << ":\n"; |
| else |
| OS << "In included file:\n"; |
| } |
| |
| /// HighlightRange - Given a SourceRange and a line number, highlight (with ~'s) |
| /// any characters in LineNo that intersect the SourceRange. |
| void TextDiagnosticPrinter::HighlightRange(const SourceRange &R, |
| const SourceManager &SM, |
| unsigned LineNo, FileID FID, |
| std::string &CaretLine, |
| const std::string &SourceLine) { |
| assert(CaretLine.size() == SourceLine.size() && |
| "Expect a correspondence between source and caret line!"); |
| if (!R.isValid()) return; |
| |
| SourceLocation Begin = SM.getInstantiationLoc(R.getBegin()); |
| SourceLocation End = SM.getInstantiationLoc(R.getEnd()); |
| |
| // If the End location and the start location are the same and are a macro |
| // location, then the range was something that came from a macro expansion |
| // or _Pragma. If this is an object-like macro, the best we can do is to |
| // highlight the range. If this is a function-like macro, we'd also like to |
| // highlight the arguments. |
| if (Begin == End && R.getEnd().isMacroID()) |
| End = SM.getInstantiationRange(R.getEnd()).second; |
| |
| unsigned StartLineNo = SM.getInstantiationLineNumber(Begin); |
| if (StartLineNo > LineNo || SM.getFileID(Begin) != FID) |
| return; // No intersection. |
| |
| unsigned EndLineNo = SM.getInstantiationLineNumber(End); |
| if (EndLineNo < LineNo || SM.getFileID(End) != FID) |
| return; // No intersection. |
| |
| // Compute the column number of the start. |
| unsigned StartColNo = 0; |
| if (StartLineNo == LineNo) { |
| StartColNo = SM.getInstantiationColumnNumber(Begin); |
| if (StartColNo) --StartColNo; // Zero base the col #. |
| } |
| |
| // Pick the first non-whitespace column. |
| while (StartColNo < SourceLine.size() && |
| (SourceLine[StartColNo] == ' ' || SourceLine[StartColNo] == '\t')) |
| ++StartColNo; |
| |
| // Compute the column number of the end. |
| unsigned EndColNo = CaretLine.size(); |
| if (EndLineNo == LineNo) { |
| EndColNo = SM.getInstantiationColumnNumber(End); |
| if (EndColNo) { |
| --EndColNo; // Zero base the col #. |
| |
| // Add in the length of the token, so that we cover multi-char tokens. |
| EndColNo += Lexer::MeasureTokenLength(End, SM, *LangOpts); |
| } else { |
| EndColNo = CaretLine.size(); |
| } |
| } |
| |
| // Pick the last non-whitespace column. |
| if (EndColNo <= SourceLine.size()) |
| while (EndColNo-1 && |
| (SourceLine[EndColNo-1] == ' ' || SourceLine[EndColNo-1] == '\t')) |
| --EndColNo; |
| else |
| EndColNo = SourceLine.size(); |
| |
| // Fill the range with ~'s. |
| assert(StartColNo <= EndColNo && "Invalid range!"); |
| for (unsigned i = StartColNo; i < EndColNo; ++i) |
| CaretLine[i] = '~'; |
| } |
| |
| void TextDiagnosticPrinter::EmitCaretDiagnostic(SourceLocation Loc, |
| SourceRange *Ranges, |
| unsigned NumRanges, |
| SourceManager &SM, |
| const CodeModificationHint *Hints, |
| unsigned NumHints) { |
| assert(!Loc.isInvalid() && "must have a valid source location here"); |
| |
| // We always emit diagnostics about the instantiation points, not the spelling |
| // points. This more closely correlates to what the user writes. |
| if (!Loc.isFileID()) { |
| SourceLocation OneLevelUp = SM.getImmediateInstantiationRange(Loc).first; |
| EmitCaretDiagnostic(OneLevelUp, Ranges, NumRanges, SM); |
| |
| // Map the location through the macro. |
| Loc = SM.getInstantiationLoc(SM.getImmediateSpellingLoc(Loc)); |
| |
| // Map the ranges. |
| for (unsigned i = 0; i != NumRanges; ++i) { |
| SourceLocation S = Ranges[i].getBegin(), E = Ranges[i].getEnd(); |
| if (S.isMacroID()) |
| S = SM.getInstantiationLoc(SM.getImmediateSpellingLoc(S)); |
| if (E.isMacroID()) |
| E = SM.getInstantiationLoc(SM.getImmediateSpellingLoc(E)); |
| Ranges[i] = SourceRange(S, E); |
| } |
| |
| if (ShowLocation) { |
| // Emit the file/line/column that this expansion came from. |
| OS << SM.getBufferName(Loc) << ':' << SM.getInstantiationLineNumber(Loc) |
| << ':'; |
| if (ShowColumn) |
| OS << SM.getInstantiationColumnNumber(Loc) << ':'; |
| OS << ' '; |
| } |
| OS << "note: instantiated from:\n"; |
| } |
| |
| // Decompose the location into a FID/Offset pair. |
| std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(Loc); |
| FileID FID = LocInfo.first; |
| unsigned FileOffset = LocInfo.second; |
| |
| // Get information about the buffer it points into. |
| std::pair<const char*, const char*> BufferInfo = SM.getBufferData(FID); |
| const char *BufStart = BufferInfo.first; |
| |
| unsigned ColNo = SM.getColumnNumber(FID, FileOffset); |
| |
| // Rewind from the current position to the start of the line. |
| const char *TokPtr = BufStart+FileOffset; |
| const char *LineStart = TokPtr-ColNo+1; // Column # is 1-based. |
| |
| |
| // Compute the line end. Scan forward from the error position to the end of |
| // the line. |
| const char *LineEnd = TokPtr; |
| while (*LineEnd != '\n' && *LineEnd != '\r' && *LineEnd != '\0') |
| ++LineEnd; |
| |
| // Copy the line of code into an std::string for ease of manipulation. |
| std::string SourceLine(LineStart, LineEnd); |
| |
| // Create a line for the caret that is filled with spaces that is the same |
| // length as the line of source code. |
| std::string CaretLine(LineEnd-LineStart, ' '); |
| |
| // Highlight all of the characters covered by Ranges with ~ characters. |
| if (NumRanges) { |
| unsigned LineNo = SM.getLineNumber(FID, FileOffset); |
| |
| for (unsigned i = 0, e = NumRanges; i != e; ++i) |
| HighlightRange(Ranges[i], SM, LineNo, FID, CaretLine, SourceLine); |
| } |
| |
| // Next, insert the caret itself. |
| if (ColNo-1 < CaretLine.size()) |
| CaretLine[ColNo-1] = '^'; |
| else |
| CaretLine.push_back('^'); |
| |
| // Scan the source line, looking for tabs. If we find any, manually expand |
| // them to 8 characters and update the CaretLine to match. |
| for (unsigned i = 0; i != SourceLine.size(); ++i) { |
| if (SourceLine[i] != '\t') continue; |
| |
| // Replace this tab with at least one space. |
| SourceLine[i] = ' '; |
| |
| // Compute the number of spaces we need to insert. |
| unsigned NumSpaces = ((i+8)&~7) - (i+1); |
| assert(NumSpaces < 8 && "Invalid computation of space amt"); |
| |
| // Insert spaces into the SourceLine. |
| SourceLine.insert(i+1, NumSpaces, ' '); |
| |
| // Insert spaces or ~'s into CaretLine. |
| CaretLine.insert(i+1, NumSpaces, CaretLine[i] == '~' ? '~' : ' '); |
| } |
| |
| // Finally, remove any blank spaces from the end of CaretLine. |
| while (CaretLine[CaretLine.size()-1] == ' ') |
| CaretLine.erase(CaretLine.end()-1); |
| |
| // Emit what we have computed. |
| OS << SourceLine << '\n'; |
| OS << CaretLine << '\n'; |
| |
| if (NumHints && PrintFixItInfo) { |
| std::string InsertionLine; |
| for (const CodeModificationHint *Hint = Hints, *LastHint = Hints + NumHints; |
| Hint != LastHint; ++Hint) { |
| if (Hint->InsertionLoc.isValid()) { |
| // We have an insertion hint. Determine whether the inserted |
| // code is on the same line as the caret. |
| std::pair<FileID, unsigned> HintLocInfo |
| = SM.getDecomposedInstantiationLoc(Hint->InsertionLoc); |
| if (SM.getLineNumber(HintLocInfo.first, HintLocInfo.second) == |
| SM.getLineNumber(FID, FileOffset)) { |
| // Insert the new code into the line just below the code |
| // that the user wrote. |
| unsigned HintColNo |
| = SM.getColumnNumber(HintLocInfo.first, HintLocInfo.second); |
| unsigned LastColumnModified |
| = HintColNo - 1 + Hint->CodeToInsert.size(); |
| if (LastColumnModified > InsertionLine.size()) |
| InsertionLine.resize(LastColumnModified, ' '); |
| std::copy(Hint->CodeToInsert.begin(), Hint->CodeToInsert.end(), |
| InsertionLine.begin() + HintColNo - 1); |
| } |
| } |
| } |
| |
| if (!InsertionLine.empty()) |
| OS << InsertionLine << '\n'; |
| } |
| } |
| |
| |
| void TextDiagnosticPrinter::HandleDiagnostic(Diagnostic::Level Level, |
| const DiagnosticInfo &Info) { |
| // If the location is specified, print out a file/line/col and include trace |
| // if enabled. |
| if (Info.getLocation().isValid()) { |
| const SourceManager &SM = Info.getLocation().getManager(); |
| PresumedLoc PLoc = SM.getPresumedLoc(Info.getLocation()); |
| unsigned LineNo = PLoc.getLine(); |
| |
| // First, if this diagnostic is not in the main file, print out the |
| // "included from" lines. |
| if (LastWarningLoc != PLoc.getIncludeLoc()) { |
| LastWarningLoc = PLoc.getIncludeLoc(); |
| PrintIncludeStack(LastWarningLoc, SM); |
| } |
| |
| // Compute the column number. |
| if (ShowLocation) { |
| OS << PLoc.getFilename() << ':' << LineNo << ':'; |
| if (ShowColumn) |
| if (unsigned ColNo = PLoc.getColumn()) |
| OS << ColNo << ':'; |
| |
| if (PrintRangeInfo && Info.getNumRanges()) { |
| FileID CaretFileID = |
| SM.getFileID(SM.getInstantiationLoc(Info.getLocation())); |
| bool PrintedRange = false; |
| |
| for (unsigned i = 0, e = Info.getNumRanges(); i != e; ++i) { |
| // Ignore invalid ranges. |
| if (!Info.getRange(i).isValid()) continue; |
| |
| SourceLocation B = Info.getRange(i).getBegin(); |
| SourceLocation E = Info.getRange(i).getEnd(); |
| std::pair<FileID, unsigned> BInfo=SM.getDecomposedInstantiationLoc(B); |
| |
| E = SM.getInstantiationLoc(E); |
| std::pair<FileID, unsigned> EInfo = SM.getDecomposedLoc(E); |
| |
| // If the start or end of the range is in another file, just discard |
| // it. |
| if (BInfo.first != CaretFileID || EInfo.first != CaretFileID) |
| continue; |
| |
| // Add in the length of the token, so that we cover multi-char tokens. |
| unsigned TokSize = Lexer::MeasureTokenLength(E, SM, *LangOpts); |
| |
| OS << '{' << SM.getLineNumber(BInfo.first, BInfo.second) << ':' |
| << SM.getColumnNumber(BInfo.first, BInfo.second) << '-' |
| << SM.getLineNumber(EInfo.first, EInfo.second) << ':' |
| << (SM.getColumnNumber(EInfo.first, EInfo.second)+TokSize) << '}'; |
| PrintedRange = true; |
| } |
| |
| if (PrintedRange) |
| OS << ':'; |
| } |
| OS << ' '; |
| } |
| } |
| |
| switch (Level) { |
| case Diagnostic::Ignored: assert(0 && "Invalid diagnostic type"); |
| case Diagnostic::Note: OS << "note: "; break; |
| case Diagnostic::Warning: OS << "warning: "; break; |
| case Diagnostic::Error: OS << "error: "; break; |
| case Diagnostic::Fatal: OS << "fatal error: "; break; |
| } |
| |
| llvm::SmallString<100> OutStr; |
| Info.FormatDiagnostic(OutStr); |
| OS.write(OutStr.begin(), OutStr.size()); |
| |
| if (PrintDiagnosticOption) |
| if (const char *Option = Diagnostic::getWarningOptionForDiag(Info.getID())) |
| OS << " [-W" << Option << ']'; |
| |
| OS << '\n'; |
| |
| // If caret diagnostics are enabled and we have location, we want to |
| // emit the caret. However, we only do this if the location moved |
| // from the last diagnostic, if the last diagnostic was a note that |
| // was part of a different warning or error diagnostic, or if the |
| // diagnostic has ranges. We don't want to emit the same caret |
| // multiple times if one loc has multiple diagnostics. |
| if (CaretDiagnostics && Info.getLocation().isValid() && |
| ((LastLoc != Info.getLocation()) || Info.getNumRanges() || |
| (LastCaretDiagnosticWasNote && Level != Diagnostic::Note) || |
| Info.getNumCodeModificationHints())) { |
| // Cache the LastLoc, it allows us to omit duplicate source/caret spewage. |
| LastLoc = Info.getLocation(); |
| LastCaretDiagnosticWasNote = (Level == Diagnostic::Note); |
| |
| // Get the ranges into a local array we can hack on. |
| SourceRange Ranges[20]; |
| unsigned NumRanges = Info.getNumRanges(); |
| assert(NumRanges < 20 && "Out of space"); |
| for (unsigned i = 0; i != NumRanges; ++i) |
| Ranges[i] = Info.getRange(i); |
| |
| unsigned NumHints = Info.getNumCodeModificationHints(); |
| for (unsigned idx = 0; idx < NumHints; ++idx) { |
| const CodeModificationHint &Hint = Info.getCodeModificationHint(idx); |
| if (Hint.RemoveRange.isValid()) { |
| assert(NumRanges < 20 && "Out of space"); |
| Ranges[NumRanges++] = Hint.RemoveRange; |
| } |
| } |
| |
| EmitCaretDiagnostic(LastLoc, Ranges, NumRanges, LastLoc.getManager(), |
| Info.getCodeModificationHints(), |
| Info.getNumCodeModificationHints()); |
| } |
| |
| OS.flush(); |
| } |