1 //===- HTMLDiagnostics.cpp - HTML Diagnostics for Paths -------------------===//
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //===----------------------------------------------------------------------===//
9 // This file defines the HTMLDiagnostics object.
11 //===----------------------------------------------------------------------===//
13 #include "clang/Analysis/PathDiagnostic.h"
14 #include "clang/AST/Decl.h"
15 #include "clang/AST/DeclBase.h"
16 #include "clang/AST/Stmt.h"
17 #include "clang/Basic/FileManager.h"
18 #include "clang/Basic/LLVM.h"
19 #include "clang/Basic/SourceLocation.h"
20 #include "clang/Basic/SourceManager.h"
21 #include "clang/Lex/Lexer.h"
22 #include "clang/Lex/Preprocessor.h"
23 #include "clang/Lex/Token.h"
24 #include "clang/Rewrite/Core/HTMLRewrite.h"
25 #include "clang/Rewrite/Core/Rewriter.h"
26 #include "clang/StaticAnalyzer/Core/AnalyzerOptions.h"
27 #include "clang/StaticAnalyzer/Core/IssueHash.h"
28 #include "clang/StaticAnalyzer/Core/PathDiagnosticConsumers.h"
29 #include "llvm/ADT/ArrayRef.h"
30 #include "llvm/ADT/SmallString.h"
31 #include "llvm/ADT/StringRef.h"
32 #include "llvm/ADT/iterator_range.h"
33 #include "llvm/Support/Casting.h"
34 #include "llvm/Support/Errc.h"
35 #include "llvm/Support/ErrorHandling.h"
36 #include "llvm/Support/FileSystem.h"
37 #include "llvm/Support/MemoryBuffer.h"
38 #include "llvm/Support/Path.h"
39 #include "llvm/Support/raw_ostream.h"
47 #include <system_error>
51 using namespace clang;
54 //===----------------------------------------------------------------------===//
56 //===----------------------------------------------------------------------===//
60 class HTMLDiagnostics : public PathDiagnosticConsumer {
61 std::string Directory;
62 bool createdDir = false;
64 const Preprocessor &PP;
65 AnalyzerOptions &AnalyzerOpts;
66 const bool SupportsCrossFileDiagnostics;
69 HTMLDiagnostics(AnalyzerOptions &AnalyzerOpts,
70 const std::string& prefix,
71 const Preprocessor &pp,
72 bool supportsMultipleFiles)
73 : Directory(prefix), PP(pp), AnalyzerOpts(AnalyzerOpts),
74 SupportsCrossFileDiagnostics(supportsMultipleFiles) {}
76 ~HTMLDiagnostics() override { FlushDiagnostics(nullptr); }
78 void FlushDiagnosticsImpl(std::vector<const PathDiagnostic *> &Diags,
79 FilesMade *filesMade) override;
81 StringRef getName() const override {
82 return "HTMLDiagnostics";
85 bool supportsCrossFileDiagnostics() const override {
86 return SupportsCrossFileDiagnostics;
89 unsigned ProcessMacroPiece(raw_ostream &os,
90 const PathDiagnosticMacroPiece& P,
93 void HandlePiece(Rewriter &R, FileID BugFileID, const PathDiagnosticPiece &P,
94 const std::vector<SourceRange> &PopUpRanges, unsigned num,
97 void HighlightRange(Rewriter& R, FileID BugFileID, SourceRange Range,
98 const char *HighlightStart = "<span class=\"mrange\">",
99 const char *HighlightEnd = "</span>");
101 void ReportDiag(const PathDiagnostic& D,
102 FilesMade *filesMade);
104 // Generate the full HTML report
105 std::string GenerateHTML(const PathDiagnostic& D, Rewriter &R,
106 const SourceManager& SMgr, const PathPieces& path,
107 const char *declName);
109 // Add HTML header/footers to file specified by FID
110 void FinalizeHTML(const PathDiagnostic& D, Rewriter &R,
111 const SourceManager& SMgr, const PathPieces& path,
112 FileID FID, const FileEntry *Entry, const char *declName);
114 // Rewrite the file specified by FID with HTML formatting.
115 void RewriteFile(Rewriter &R, const PathPieces& path, FileID FID);
119 /// \return Javascript for displaying shortcuts help;
120 StringRef showHelpJavascript();
122 /// \return Javascript for navigating the HTML report using j/k keys.
123 StringRef generateKeyboardNavigationJavascript();
125 /// \return JavaScript for an option to only show relevant lines.
126 std::string showRelevantLinesJavascript(
127 const PathDiagnostic &D, const PathPieces &path);
129 /// Write executed lines from \p D in JSON format into \p os.
130 void dumpCoverageData(const PathDiagnostic &D,
131 const PathPieces &path,
132 llvm::raw_string_ostream &os);
137 void ento::createHTMLDiagnosticConsumer(
138 AnalyzerOptions &AnalyzerOpts, PathDiagnosticConsumers &C,
139 const std::string &prefix, const Preprocessor &PP,
140 const cross_tu::CrossTranslationUnitContext &) {
141 C.push_back(new HTMLDiagnostics(AnalyzerOpts, prefix, PP, true));
144 void ento::createHTMLSingleFileDiagnosticConsumer(
145 AnalyzerOptions &AnalyzerOpts, PathDiagnosticConsumers &C,
146 const std::string &prefix, const Preprocessor &PP,
147 const cross_tu::CrossTranslationUnitContext &) {
148 C.push_back(new HTMLDiagnostics(AnalyzerOpts, prefix, PP, false));
151 //===----------------------------------------------------------------------===//
152 // Report processing.
153 //===----------------------------------------------------------------------===//
155 void HTMLDiagnostics::FlushDiagnosticsImpl(
156 std::vector<const PathDiagnostic *> &Diags,
157 FilesMade *filesMade) {
158 for (const auto Diag : Diags)
159 ReportDiag(*Diag, filesMade);
162 void HTMLDiagnostics::ReportDiag(const PathDiagnostic& D,
163 FilesMade *filesMade) {
164 // Create the HTML directory if it is missing.
167 if (std::error_code ec = llvm::sys::fs::create_directories(Directory)) {
168 llvm::errs() << "warning: could not create directory '"
169 << Directory << "': " << ec.message() << '\n';
178 // First flatten out the entire path to make it easier to use.
179 PathPieces path = D.path.flatten(/*ShouldFlattenMacros=*/false);
181 // The path as already been prechecked that the path is non-empty.
182 assert(!path.empty());
183 const SourceManager &SMgr = path.front()->getLocation().getManager();
185 // Create a new rewriter to generate HTML.
186 Rewriter R(const_cast<SourceManager&>(SMgr), PP.getLangOpts());
188 // The file for the first path element is considered the main report file, it
189 // will usually be equivalent to SMgr.getMainFileID(); however, it might be a
190 // header when -analyzer-opt-analyze-headers is used.
191 FileID ReportFile = path.front()->getLocation().asLocation().getExpansionLoc().getFileID();
193 // Get the function/method name
194 SmallString<128> declName("unknown");
196 if (const Decl *DeclWithIssue = D.getDeclWithIssue()) {
197 if (const auto *ND = dyn_cast<NamedDecl>(DeclWithIssue))
198 declName = ND->getDeclName().getAsString();
200 if (const Stmt *Body = DeclWithIssue->getBody()) {
201 // Retrieve the relative position of the declaration which will be used
204 SMgr.getExpansionLoc(path.back()->getLocation().asLocation()),
206 FullSourceLoc FunL(SMgr.getExpansionLoc(Body->getBeginLoc()), SMgr);
207 offsetDecl = L.getExpansionLineNumber() - FunL.getExpansionLineNumber();
211 std::string report = GenerateHTML(D, R, SMgr, path, declName.c_str());
212 if (report.empty()) {
213 llvm::errs() << "warning: no diagnostics generated for main file.\n";
217 // Create a path for the target HTML file.
219 SmallString<128> Model, ResultPath;
221 if (!AnalyzerOpts.ShouldWriteStableReportFilename) {
222 llvm::sys::path::append(Model, Directory, "report-%%%%%%.html");
223 if (std::error_code EC =
224 llvm::sys::fs::make_absolute(Model)) {
225 llvm::errs() << "warning: could not make '" << Model
226 << "' absolute: " << EC.message() << '\n';
229 if (std::error_code EC =
230 llvm::sys::fs::createUniqueFile(Model, FD, ResultPath)) {
231 llvm::errs() << "warning: could not create file in '" << Directory
232 << "': " << EC.message() << '\n';
239 // Find a filename which is not already used
240 const FileEntry* Entry = SMgr.getFileEntryForID(ReportFile);
241 std::stringstream filename;
243 filename << "report-"
244 << llvm::sys::path::filename(Entry->getName()).str()
245 << "-" << declName.c_str()
247 << "-" << i << ".html";
248 llvm::sys::path::append(Model, Directory,
250 EC = llvm::sys::fs::openFileForReadWrite(
251 Model, FD, llvm::sys::fs::CD_CreateNew, llvm::sys::fs::OF_None);
252 if (EC && EC != llvm::errc::file_exists) {
253 llvm::errs() << "warning: could not create file '" << Model
254 << "': " << EC.message() << '\n';
261 llvm::raw_fd_ostream os(FD, true);
264 filesMade->addDiagnostic(D, getName(),
265 llvm::sys::path::filename(ResultPath));
267 // Emit the HTML to disk.
271 std::string HTMLDiagnostics::GenerateHTML(const PathDiagnostic& D, Rewriter &R,
272 const SourceManager& SMgr, const PathPieces& path, const char *declName) {
273 // Rewrite source files as HTML for every new file the path crosses
274 std::vector<FileID> FileIDs;
275 for (auto I : path) {
276 FileID FID = I->getLocation().asLocation().getExpansionLoc().getFileID();
277 if (llvm::is_contained(FileIDs, FID))
280 FileIDs.push_back(FID);
281 RewriteFile(R, path, FID);
284 if (SupportsCrossFileDiagnostics && FileIDs.size() > 1) {
285 // Prefix file names, anchor tags, and nav cursors to every file
286 for (auto I = FileIDs.begin(), E = FileIDs.end(); I != E; I++) {
288 llvm::raw_string_ostream os(s);
290 if (I != FileIDs.begin())
291 os << "<hr class=divider>\n";
293 os << "<div id=File" << I->getHashValue() << ">\n";
296 if (I != FileIDs.begin())
297 os << "<div class=FileNav><a href=\"#File" << (I - 1)->getHashValue()
298 << "\">←</a></div>";
300 os << "<h4 class=FileName>" << SMgr.getFileEntryForID(*I)->getName()
305 os << "<div class=FileNav><a href=\"#File" << (I + 1)->getHashValue()
306 << "\">→</a></div>";
310 R.InsertTextBefore(SMgr.getLocForStartOfFile(*I), os.str());
313 // Append files to the main report file in the order they appear in the path
314 for (auto I : llvm::make_range(FileIDs.begin() + 1, FileIDs.end())) {
316 llvm::raw_string_ostream os(s);
318 const RewriteBuffer *Buf = R.getRewriteBufferFor(I);
322 R.InsertTextAfter(SMgr.getLocForEndOfFile(FileIDs[0]), os.str());
326 const RewriteBuffer *Buf = R.getRewriteBufferFor(FileIDs[0]);
330 // Add CSS, header, and footer.
332 path.back()->getLocation().asLocation().getExpansionLoc().getFileID();
333 const FileEntry* Entry = SMgr.getFileEntryForID(FID);
334 FinalizeHTML(D, R, SMgr, path, FileIDs[0], Entry, declName);
337 llvm::raw_string_ostream os(file);
344 void HTMLDiagnostics::dumpCoverageData(
345 const PathDiagnostic &D,
346 const PathPieces &path,
347 llvm::raw_string_ostream &os) {
349 const FilesToLineNumsMap &ExecutedLines = D.getExecutedLines();
351 os << "var relevant_lines = {";
352 for (auto I = ExecutedLines.begin(),
353 E = ExecutedLines.end(); I != E; ++I) {
354 if (I != ExecutedLines.begin())
357 os << "\"" << I->first.getHashValue() << "\": {";
358 for (unsigned LineNo : I->second) {
359 if (LineNo != *(I->second.begin()))
362 os << "\"" << LineNo << "\": 1";
370 std::string HTMLDiagnostics::showRelevantLinesJavascript(
371 const PathDiagnostic &D, const PathPieces &path) {
373 llvm::raw_string_ostream os(s);
374 os << "<script type='text/javascript'>\n";
375 dumpCoverageData(D, path, os);
378 var filterCounterexample = function (hide) {
379 var tables = document.getElementsByClassName("code");
380 for (var t=0; t<tables.length; t++) {
381 var table = tables[t];
382 var file_id = table.getAttribute("data-fileid");
383 var lines_in_fid = relevant_lines[file_id];
387 var lines = table.getElementsByClassName("codeline");
388 for (var i=0; i<lines.length; i++) {
390 var lineNo = el.getAttribute("data-linenumber");
391 if (!lines_in_fid[lineNo]) {
393 el.setAttribute("hidden", "");
395 el.removeAttribute("hidden");
402 window.addEventListener("keydown", function (event) {
403 if (event.defaultPrevented) {
406 if (event.key == "S") {
407 var checked = document.getElementsByName("showCounterexample")[0].checked;
408 filterCounterexample(!checked);
409 document.getElementsByName("showCounterexample")[0].checked = !checked;
413 event.preventDefault();
416 document.addEventListener("DOMContentLoaded", function() {
417 document.querySelector('input[name="showCounterexample"]').onchange=
419 filterCounterexample(this.checked);
425 <input type="checkbox" name="showCounterexample" id="showCounterexample" />
426 <label for="showCounterexample">
427 Show only relevant lines
435 void HTMLDiagnostics::FinalizeHTML(const PathDiagnostic& D, Rewriter &R,
436 const SourceManager& SMgr, const PathPieces& path, FileID FID,
437 const FileEntry *Entry, const char *declName) {
438 // This is a cludge; basically we want to append either the full
439 // working directory if we have no directory information. This is
440 // a work in progress.
442 llvm::SmallString<0> DirName;
444 if (llvm::sys::path::is_relative(Entry->getName())) {
445 llvm::sys::fs::current_path(DirName);
449 int LineNumber = path.back()->getLocation().asLocation().getExpansionLineNumber();
450 int ColumnNumber = path.back()->getLocation().asLocation().getExpansionColumnNumber();
452 R.InsertTextBefore(SMgr.getLocForStartOfFile(FID), showHelpJavascript());
454 R.InsertTextBefore(SMgr.getLocForStartOfFile(FID),
455 generateKeyboardNavigationJavascript());
457 // Checkbox and javascript for filtering the output to the counterexample.
458 R.InsertTextBefore(SMgr.getLocForStartOfFile(FID),
459 showRelevantLinesJavascript(D, path));
461 // Add the name of the file as an <h1> tag.
464 llvm::raw_string_ostream os(s);
466 os << "<!-- REPORTHEADER -->\n"
467 << "<h3>Bug Summary</h3>\n<table class=\"simpletable\">\n"
468 "<tr><td class=\"rowname\">File:</td><td>"
469 << html::EscapeText(DirName)
470 << html::EscapeText(Entry->getName())
471 << "</td></tr>\n<tr><td class=\"rowname\">Warning:</td><td>"
472 "<a href=\"#EndPath\">line "
477 << D.getVerboseDescription() << "</td></tr>\n";
479 // The navigation across the extra notes pieces.
480 unsigned NumExtraPieces = 0;
481 for (const auto &Piece : path) {
482 if (const auto *P = dyn_cast<PathDiagnosticNotePiece>(Piece.get())) {
484 P->getLocation().asLocation().getExpansionLineNumber();
486 P->getLocation().asLocation().getExpansionColumnNumber();
487 os << "<tr><td class=\"rowname\">Note:</td><td>"
488 << "<a href=\"#Note" << NumExtraPieces << "\">line "
489 << LineNumber << ", column " << ColumnNumber << "</a><br />"
490 << P->getString() << "</td></tr>";
495 // Output any other meta data.
497 for (PathDiagnostic::meta_iterator I = D.meta_begin(), E = D.meta_end();
499 os << "<tr><td></td><td>" << html::EscapeText(*I) << "</td></tr>\n";
504 <!-- REPORTSUMMARYEXTRA -->
505 <h3>Annotated Source Code</h3>
506 <p>Press <a href="#" onclick="toggleHelp(); return false;">'?'</a>
507 to see keyboard shortcuts</p>
508 <input type="checkbox" class="spoilerhider" id="showinvocation" />
509 <label for="showinvocation" >Show analyzer invocation</label>
510 <div class="spoiler">clang -cc1 )<<<";
511 os << html::EscapeText(AnalyzerOpts.FullCompilerInvocation);
514 <div id='tooltiphint' hidden="true">
515 <p>Keyboard shortcuts: </p>
517 <li>Use 'j/k' keys for keyboard navigation</li>
518 <li>Use 'Shift+S' to show/hide relevant lines</li>
519 <li>Use '?' to toggle this window</li>
521 <a href="#" onclick="toggleHelp(); return false;">Close</a>
524 R.InsertTextBefore(SMgr.getLocForStartOfFile(FID), os.str());
527 // Embed meta-data tags.
530 llvm::raw_string_ostream os(s);
532 StringRef BugDesc = D.getVerboseDescription();
533 if (!BugDesc.empty())
534 os << "\n<!-- BUGDESC " << BugDesc << " -->\n";
536 StringRef BugType = D.getBugType();
537 if (!BugType.empty())
538 os << "\n<!-- BUGTYPE " << BugType << " -->\n";
540 PathDiagnosticLocation UPDLoc = D.getUniqueingLoc();
541 FullSourceLoc L(SMgr.getExpansionLoc(UPDLoc.isValid()
542 ? UPDLoc.asLocation()
543 : D.getLocation().asLocation()),
545 const Decl *DeclWithIssue = D.getDeclWithIssue();
547 StringRef BugCategory = D.getCategory();
548 if (!BugCategory.empty())
549 os << "\n<!-- BUGCATEGORY " << BugCategory << " -->\n";
551 os << "\n<!-- BUGFILE " << DirName << Entry->getName() << " -->\n";
553 os << "\n<!-- FILENAME " << llvm::sys::path::filename(Entry->getName()) << " -->\n";
555 os << "\n<!-- FUNCTIONNAME " << declName << " -->\n";
557 os << "\n<!-- ISSUEHASHCONTENTOFLINEINCONTEXT "
558 << GetIssueHash(SMgr, L, D.getCheckerName(), D.getBugType(),
559 DeclWithIssue, PP.getLangOpts())
562 os << "\n<!-- BUGLINE "
566 os << "\n<!-- BUGCOLUMN "
570 os << "\n<!-- BUGPATHLENGTH " << path.size() << " -->\n";
572 // Mark the end of the tags.
573 os << "\n<!-- BUGMETAEND -->\n";
576 R.InsertTextBefore(SMgr.getLocForStartOfFile(FID), os.str());
579 html::AddHeaderFooterInternalBuiltinCSS(R, FID, Entry->getName());
582 StringRef HTMLDiagnostics::showHelpJavascript() {
584 <script type='text/javascript'>
586 var toggleHelp = function() {
587 var hint = document.querySelector("#tooltiphint");
588 var attributeName = "hidden";
589 if (hint.hasAttribute(attributeName)) {
590 hint.removeAttribute(attributeName);
592 hint.setAttribute("hidden", "true");
595 window.addEventListener("keydown", function (event) {
596 if (event.defaultPrevented) {
599 if (event.key == "?") {
604 event.preventDefault();
610 static bool shouldDisplayPopUpRange(const SourceRange &Range) {
611 return !(Range.getBegin().isMacroID() || Range.getEnd().isMacroID());
615 HandlePopUpPieceStartTag(Rewriter &R,
616 const std::vector<SourceRange> &PopUpRanges) {
617 for (const auto &Range : PopUpRanges) {
618 if (!shouldDisplayPopUpRange(Range))
621 html::HighlightRange(R, Range.getBegin(), Range.getEnd(), "",
622 "<table class='variable_popup'><tbody>",
623 /*IsTokenRange=*/true);
627 static void HandlePopUpPieceEndTag(Rewriter &R,
628 const PathDiagnosticPopUpPiece &Piece,
629 std::vector<SourceRange> &PopUpRanges,
630 unsigned int LastReportedPieceIndex,
631 unsigned int PopUpPieceIndex) {
632 SmallString<256> Buf;
633 llvm::raw_svector_ostream Out(Buf);
635 SourceRange Range(Piece.getLocation().asRange());
636 if (!shouldDisplayPopUpRange(Range))
639 // Write out the path indices with a right arrow and the message as a row.
640 Out << "<tr><td valign='top'><div class='PathIndex PathIndexPopUp'>"
641 << LastReportedPieceIndex;
643 // Also annotate the state transition with extra indices.
644 Out << '.' << PopUpPieceIndex;
646 Out << "</div></td><td>" << Piece.getString() << "</td></tr>";
648 // If no report made at this range mark the variable and add the end tags.
649 if (std::find(PopUpRanges.begin(), PopUpRanges.end(), Range) ==
651 // Store that we create a report at this range.
652 PopUpRanges.push_back(Range);
654 Out << "</tbody></table></span>";
655 html::HighlightRange(R, Range.getBegin(), Range.getEnd(),
656 "<span class='variable'>", Buf.c_str(),
657 /*IsTokenRange=*/true);
659 // Otherwise inject just the new row at the end of the range.
660 html::HighlightRange(R, Range.getBegin(), Range.getEnd(), "", Buf.c_str(),
661 /*IsTokenRange=*/true);
665 void HTMLDiagnostics::RewriteFile(Rewriter &R,
666 const PathPieces& path, FileID FID) {
668 // Maintain the counts of extra note pieces separately.
669 unsigned TotalPieces = path.size();
670 unsigned TotalNotePieces = std::count_if(
671 path.begin(), path.end(), [](const PathDiagnosticPieceRef &p) {
672 return isa<PathDiagnosticNotePiece>(*p);
674 unsigned PopUpPieceCount = std::count_if(
675 path.begin(), path.end(), [](const PathDiagnosticPieceRef &p) {
676 return isa<PathDiagnosticPopUpPiece>(*p);
679 unsigned TotalRegularPieces = TotalPieces - TotalNotePieces - PopUpPieceCount;
680 unsigned NumRegularPieces = TotalRegularPieces;
681 unsigned NumNotePieces = TotalNotePieces;
682 // Stores the count of the regular piece indices.
683 std::map<int, int> IndexMap;
685 // Stores the different ranges where we have reported something.
686 std::vector<SourceRange> PopUpRanges;
687 for (auto I = path.rbegin(), E = path.rend(); I != E; ++I) {
688 const auto &Piece = *I->get();
690 if (isa<PathDiagnosticPopUpPiece>(Piece)) {
691 ++IndexMap[NumRegularPieces];
692 } else if (isa<PathDiagnosticNotePiece>(Piece)) {
693 // This adds diagnostic bubbles, but not navigation.
694 // Navigation through note pieces would be added later,
695 // as a separate pass through the piece list.
696 HandlePiece(R, FID, Piece, PopUpRanges, NumNotePieces, TotalNotePieces);
699 HandlePiece(R, FID, Piece, PopUpRanges, NumRegularPieces,
705 // Secondary indexing if we are having multiple pop-ups between two notes.
706 // (e.g. [(13) 'a' is 'true']; [(13.1) 'b' is 'false']; [(13.2) 'c' is...)
707 NumRegularPieces = TotalRegularPieces;
708 for (auto I = path.rbegin(), E = path.rend(); I != E; ++I) {
709 const auto &Piece = *I->get();
711 if (const auto *PopUpP = dyn_cast<PathDiagnosticPopUpPiece>(&Piece)) {
712 int PopUpPieceIndex = IndexMap[NumRegularPieces];
714 // Pop-up pieces needs the index of the last reported piece and its count
715 // how many times we report to handle multiple reports on the same range.
716 // This marks the variable, adds the </table> end tag and the message
717 // (list element) as a row. The <table> start tag will be added after the
718 // rows has been written out. Note: It stores every different range.
719 HandlePopUpPieceEndTag(R, *PopUpP, PopUpRanges, NumRegularPieces,
722 if (PopUpPieceIndex > 0)
723 --IndexMap[NumRegularPieces];
725 } else if (!isa<PathDiagnosticNotePiece>(Piece)) {
730 // Add the <table> start tag of pop-up pieces based on the stored ranges.
731 HandlePopUpPieceStartTag(R, PopUpRanges);
733 // Add line numbers, header, footer, etc.
734 html::EscapeText(R, FID);
735 html::AddLineNumbers(R, FID);
737 // If we have a preprocessor, relex the file and syntax highlight.
738 // We might not have a preprocessor if we come from a deserialized AST file,
740 html::SyntaxHighlight(R, FID, PP);
741 html::HighlightMacros(R, FID, PP);
744 void HTMLDiagnostics::HandlePiece(Rewriter &R, FileID BugFileID,
745 const PathDiagnosticPiece &P,
746 const std::vector<SourceRange> &PopUpRanges,
747 unsigned num, unsigned max) {
748 // For now, just draw a box above the line in question, and emit the
750 FullSourceLoc Pos = P.getLocation().asLocation();
755 SourceManager &SM = R.getSourceMgr();
756 assert(&Pos.getManager() == &SM && "SourceManagers are different!");
757 std::pair<FileID, unsigned> LPosInfo = SM.getDecomposedExpansionLoc(Pos);
759 if (LPosInfo.first != BugFileID)
762 const llvm::MemoryBuffer *Buf = SM.getBuffer(LPosInfo.first);
763 const char* FileStart = Buf->getBufferStart();
765 // Compute the column number. Rewind from the current position to the start
767 unsigned ColNo = SM.getColumnNumber(LPosInfo.first, LPosInfo.second);
768 const char *TokInstantiationPtr =Pos.getExpansionLoc().getCharacterData();
769 const char *LineStart = TokInstantiationPtr-ColNo;
772 const char *LineEnd = TokInstantiationPtr;
773 const char* FileEnd = Buf->getBufferEnd();
774 while (*LineEnd != '\n' && LineEnd != FileEnd)
777 // Compute the margin offset by counting tabs and non-tabs.
779 for (const char* c = LineStart; c != TokInstantiationPtr; ++c)
780 PosNo += *c == '\t' ? 8 : 1;
782 // Create the html for the message.
784 const char *Kind = nullptr;
786 bool SuppressIndex = (max == 1);
787 switch (P.getKind()) {
788 case PathDiagnosticPiece::Event: Kind = "Event"; break;
789 case PathDiagnosticPiece::ControlFlow: Kind = "Control"; break;
790 // Setting Kind to "Control" is intentional.
791 case PathDiagnosticPiece::Macro: Kind = "Control"; break;
792 case PathDiagnosticPiece::Note:
795 SuppressIndex = true;
797 case PathDiagnosticPiece::Call:
798 case PathDiagnosticPiece::PopUp:
799 llvm_unreachable("Calls and extra notes should already be handled");
803 llvm::raw_string_ostream os(sbuf);
805 os << "\n<tr><td class=\"num\"></td><td class=\"line\"><div id=\"";
814 os << "\" class=\"msg";
816 os << " msg" << Kind;
817 os << "\" style=\"margin-left:" << PosNo << "ex";
819 // Output a maximum size.
820 if (!isa<PathDiagnosticMacroPiece>(P)) {
821 // Get the string and determining its maximum substring.
822 const auto &Msg = P.getString();
823 unsigned max_token = 0;
825 unsigned len = Msg.size();
835 if (cnt > max_token) max_token = cnt;
842 // Determine the approximate size of the message bubble in em.
844 const unsigned max_line = 120;
846 if (max_token >= max_line)
849 unsigned characters = max_line;
850 unsigned lines = len / max_line;
853 for (; characters > max_token; --characters)
854 if (len / characters > lines) {
864 os << "; max-width:" << em << "em";
867 os << "; max-width:100em";
871 if (!SuppressIndex) {
872 os << "<table class=\"msgT\"><tr><td valign=\"top\">";
873 os << "<div class=\"PathIndex";
874 if (Kind) os << " PathIndex" << Kind;
875 os << "\">" << num << "</div>";
878 os << "</td><td><div class=\"PathNav\"><a href=\"#Path"
880 << "\" title=\"Previous event ("
882 << ")\">←</a></div>";
888 if (const auto *MP = dyn_cast<PathDiagnosticMacroPiece>(&P)) {
889 os << "Within the expansion of the macro '";
891 // Get the name of the macro by relexing it.
893 FullSourceLoc L = MP->getLocation().asLocation().getExpansionLoc();
894 assert(L.isFileID());
895 StringRef BufferInfo = L.getBufferData();
896 std::pair<FileID, unsigned> LocInfo = L.getDecomposedLoc();
897 const char* MacroName = LocInfo.second + BufferInfo.data();
898 Lexer rawLexer(SM.getLocForStartOfFile(LocInfo.first), PP.getLangOpts(),
899 BufferInfo.begin(), MacroName, BufferInfo.end());
902 rawLexer.LexFromRawLexer(TheTok);
903 for (unsigned i = 0, n = TheTok.getLength(); i < n; ++i)
909 if (!SuppressIndex) {
912 os << "<td><div class=\"PathNav\"><a href=\"#";
916 os << "Path" << (num + 1);
917 os << "\" title=\"Next event ("
919 << ")\">→</a></div></td>";
922 os << "</tr></table>";
925 // Within a macro piece. Write out each event.
926 ProcessMacroPiece(os, *MP, 0);
929 os << html::EscapeText(P.getString());
931 if (!SuppressIndex) {
934 os << "<td><div class=\"PathNav\"><a href=\"#";
938 os << "Path" << (num + 1);
939 os << "\" title=\"Next event ("
941 << ")\">→</a></div></td>";
944 os << "</tr></table>";
948 os << "</div></td></tr>";
950 // Insert the new html.
951 unsigned DisplayPos = LineEnd - FileStart;
953 SM.getLocForStartOfFile(LPosInfo.first).getLocWithOffset(DisplayPos);
955 R.InsertTextBefore(Loc, os.str());
957 // Now highlight the ranges.
958 ArrayRef<SourceRange> Ranges = P.getRanges();
959 for (const auto &Range : Ranges) {
960 // If we have already highlighted the range as a pop-up there is no work.
961 if (std::find(PopUpRanges.begin(), PopUpRanges.end(), Range) !=
965 HighlightRange(R, LPosInfo.first, Range);
969 static void EmitAlphaCounter(raw_ostream &os, unsigned n) {
970 unsigned x = n % ('z' - 'a');
974 EmitAlphaCounter(os, n);
979 unsigned HTMLDiagnostics::ProcessMacroPiece(raw_ostream &os,
980 const PathDiagnosticMacroPiece& P,
982 for (const auto &subPiece : P.subPieces) {
983 if (const auto *MP = dyn_cast<PathDiagnosticMacroPiece>(subPiece.get())) {
984 num = ProcessMacroPiece(os, *MP, num);
988 if (const auto *EP = dyn_cast<PathDiagnosticEventPiece>(subPiece.get())) {
989 os << "<div class=\"msg msgEvent\" style=\"width:94%; "
991 "<table class=\"msgT\"><tr>"
992 "<td valign=\"top\"><div class=\"PathIndex PathIndexEvent\">";
993 EmitAlphaCounter(os, num++);
994 os << "</div></td><td valign=\"top\">"
995 << html::EscapeText(EP->getString())
996 << "</td></tr></table></div>\n";
1003 void HTMLDiagnostics::HighlightRange(Rewriter& R, FileID BugFileID,
1005 const char *HighlightStart,
1006 const char *HighlightEnd) {
1007 SourceManager &SM = R.getSourceMgr();
1008 const LangOptions &LangOpts = R.getLangOpts();
1010 SourceLocation InstantiationStart = SM.getExpansionLoc(Range.getBegin());
1011 unsigned StartLineNo = SM.getExpansionLineNumber(InstantiationStart);
1013 SourceLocation InstantiationEnd = SM.getExpansionLoc(Range.getEnd());
1014 unsigned EndLineNo = SM.getExpansionLineNumber(InstantiationEnd);
1016 if (EndLineNo < StartLineNo)
1019 if (SM.getFileID(InstantiationStart) != BugFileID ||
1020 SM.getFileID(InstantiationEnd) != BugFileID)
1023 // Compute the column number of the end.
1024 unsigned EndColNo = SM.getExpansionColumnNumber(InstantiationEnd);
1025 unsigned OldEndColNo = EndColNo;
1028 // Add in the length of the token, so that we cover multi-char tokens.
1029 EndColNo += Lexer::MeasureTokenLength(Range.getEnd(), SM, LangOpts)-1;
1032 // Highlight the range. Make the span tag the outermost tag for the
1036 InstantiationEnd.getLocWithOffset(EndColNo - OldEndColNo);
1038 html::HighlightRange(R, InstantiationStart, E, HighlightStart, HighlightEnd);
1041 StringRef HTMLDiagnostics::generateKeyboardNavigationJavascript() {
1043 <script type='text/javascript'>
1044 var digitMatcher = new RegExp("[0-9]+");
1046 document.addEventListener("DOMContentLoaded", function() {
1047 document.querySelectorAll(".PathNav > a").forEach(
1048 function(currentValue, currentIndex) {
1049 var hrefValue = currentValue.getAttribute("href");
1050 currentValue.onclick = function() {
1051 scrollTo(document.querySelector(hrefValue));
1057 var findNum = function() {
1058 var s = document.querySelector(".selected");
1059 if (!s || s.id == "EndPath") {
1062 var out = parseInt(digitMatcher.exec(s.id)[0]);
1066 var scrollTo = function(el) {
1067 document.querySelectorAll(".selected").forEach(function(s) {
1068 s.classList.remove("selected");
1070 el.classList.add("selected");
1071 window.scrollBy(0, el.getBoundingClientRect().top -
1072 (window.innerHeight / 2));
1075 var move = function(num, up, numItems) {
1076 if (num == 1 && up || num == numItems - 1 && !up) {
1078 } else if (num == 0 && up) {
1079 return numItems - 1;
1080 } else if (num == 0 && !up) {
1081 return 1 % numItems;
1083 return up ? num - 1 : num + 1;
1086 var numToId = function(num) {
1088 return document.getElementById("EndPath")
1090 return document.getElementById("Path" + num);
1093 var navigateTo = function(up) {
1094 var numItems = document.querySelectorAll(
1095 ".line > .msgEvent, .line > .msgControl").length;
1096 var currentSelected = findNum();
1097 var newSelected = move(currentSelected, up, numItems);
1098 var newEl = numToId(newSelected, numItems);
1100 // Scroll element into center.
1104 window.addEventListener("keydown", function (event) {
1105 if (event.defaultPrevented) {
1108 if (event.key == "j") {
1109 navigateTo(/*up=*/false);
1110 } else if (event.key == "k") {
1111 navigateTo(/*up=*/true);
1115 event.preventDefault();