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llvm-project/clang/lib/Frontend/HTMLDiagnostics.cpp

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//===--- HTMLDiagnostics.cpp - HTML Diagnostics for Paths ----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the HTMLDiagnostics object.
//
//===----------------------------------------------------------------------===//
#include "clang/Frontend/PathDiagnosticClients.h"
#include "clang/Analysis/PathDiagnostic.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Decl.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/FileManager.h"
#include "clang/Rewrite/Rewriter.h"
#include "clang/Rewrite/HTMLRewrite.h"
#include "clang/Lex/Lexer.h"
#include "clang/Lex/Preprocessor.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/System/Path.h"
using namespace clang;
//===----------------------------------------------------------------------===//
// Boilerplate.
//===----------------------------------------------------------------------===//
namespace {
class VISIBILITY_HIDDEN HTMLDiagnostics : public PathDiagnosticClient {
llvm::sys::Path Directory, FilePrefix;
bool createdDir, noDir;
const Preprocessor &PP;
std::vector<const PathDiagnostic*> BatchedDiags;
public:
HTMLDiagnostics(const std::string& prefix, const Preprocessor &pp);
virtual ~HTMLDiagnostics() { FlushDiagnostics(NULL); }
virtual void FlushDiagnostics(llvm::SmallVectorImpl<std::string> *FilesMade);
virtual void HandlePathDiagnostic(const PathDiagnostic* D);
virtual llvm::StringRef getName() const {
return "HTMLDiagnostics";
}
unsigned ProcessMacroPiece(llvm::raw_ostream& os,
const PathDiagnosticMacroPiece& P,
unsigned num);
void HandlePiece(Rewriter& R, FileID BugFileID,
const PathDiagnosticPiece& P, unsigned num, unsigned max);
void HighlightRange(Rewriter& R, FileID BugFileID, SourceRange Range,
const char *HighlightStart = "<span class=\"mrange\">",
const char *HighlightEnd = "</span>");
void ReportDiag(const PathDiagnostic& D,
llvm::SmallVectorImpl<std::string> *FilesMade);
};
} // end anonymous namespace
HTMLDiagnostics::HTMLDiagnostics(const std::string& prefix,
const Preprocessor &pp)
: Directory(prefix), FilePrefix(prefix), createdDir(false), noDir(false),
PP(pp) {
// All html files begin with "report"
FilePrefix.appendComponent("report");
}
PathDiagnosticClient*
clang::CreateHTMLDiagnosticClient(const std::string& prefix,
const Preprocessor &PP) {
return new HTMLDiagnostics(prefix, PP);
}
//===----------------------------------------------------------------------===//
// Report processing.
//===----------------------------------------------------------------------===//
void HTMLDiagnostics::HandlePathDiagnostic(const PathDiagnostic* D) {
if (!D)
return;
if (D->empty()) {
delete D;
return;
}
const_cast<PathDiagnostic*>(D)->flattenLocations();
BatchedDiags.push_back(D);
}
void
HTMLDiagnostics::FlushDiagnostics(llvm::SmallVectorImpl<std::string> *FilesMade)
{
while (!BatchedDiags.empty()) {
const PathDiagnostic* D = BatchedDiags.back();
BatchedDiags.pop_back();
ReportDiag(*D, FilesMade);
delete D;
}
}
void HTMLDiagnostics::ReportDiag(const PathDiagnostic& D,
llvm::SmallVectorImpl<std::string> *FilesMade){
// Create the HTML directory if it is missing.
if (!createdDir) {
createdDir = true;
std::string ErrorMsg;
Directory.createDirectoryOnDisk(true, &ErrorMsg);
if (!Directory.isDirectory()) {
llvm::errs() << "warning: could not create directory '"
<< Directory.str() << "'\n"
<< "reason: " << ErrorMsg << '\n';
noDir = true;
return;
}
}
if (noDir)
return;
const SourceManager &SMgr = D.begin()->getLocation().getManager();
FileID FID;
// Verify that the entire path is from the same FileID.
for (PathDiagnostic::const_iterator I = D.begin(), E = D.end(); I != E; ++I) {
FullSourceLoc L = I->getLocation().asLocation().getInstantiationLoc();
if (FID.isInvalid()) {
FID = SMgr.getFileID(L);
} else if (SMgr.getFileID(L) != FID)
return; // FIXME: Emit a warning?
// Check the source ranges.
for (PathDiagnosticPiece::range_iterator RI=I->ranges_begin(),
RE=I->ranges_end(); RI!=RE; ++RI) {
SourceLocation L = SMgr.getInstantiationLoc(RI->getBegin());
if (!L.isFileID() || SMgr.getFileID(L) != FID)
return; // FIXME: Emit a warning?
L = SMgr.getInstantiationLoc(RI->getEnd());
if (!L.isFileID() || SMgr.getFileID(L) != FID)
return; // FIXME: Emit a warning?
}
}
if (FID.isInvalid())
return; // FIXME: Emit a warning?
// Create a new rewriter to generate HTML.
Rewriter R(const_cast<SourceManager&>(SMgr), PP.getLangOptions());
// Process the path.
unsigned n = D.size();
unsigned max = n;
for (PathDiagnostic::const_reverse_iterator I=D.rbegin(), E=D.rend();
I!=E; ++I, --n)
HandlePiece(R, FID, *I, n, max);
// Add line numbers, header, footer, etc.
// unsigned FID = R.getSourceMgr().getMainFileID();
html::EscapeText(R, FID);
html::AddLineNumbers(R, FID);
// If we have a preprocessor, relex the file and syntax highlight.
// We might not have a preprocessor if we come from a deserialized AST file,
// for example.
html::SyntaxHighlight(R, FID, PP);
html::HighlightMacros(R, FID, PP);
// Get the full directory name of the analyzed file.
const FileEntry* Entry = SMgr.getFileEntryForID(FID);
// This is a cludge; basically we want to append either the full
// working directory if we have no directory information. This is
// a work in progress.
std::string DirName = "";
if (!llvm::sys::Path(Entry->getName()).isAbsolute()) {
llvm::sys::Path P = llvm::sys::Path::GetCurrentDirectory();
DirName = P.str() + "/";
}
// Add the name of the file as an <h1> tag.
{
std::string s;
llvm::raw_string_ostream os(s);
os << "<!-- REPORTHEADER -->\n"
<< "<h3>Bug Summary</h3>\n<table class=\"simpletable\">\n"
"<tr><td class=\"rowname\">File:</td><td>"
<< html::EscapeText(DirName)
<< html::EscapeText(Entry->getName())
<< "</td></tr>\n<tr><td class=\"rowname\">Location:</td><td>"
"<a href=\"#EndPath\">line "
<< (*D.rbegin()).getLocation().asLocation().getInstantiationLineNumber()
<< ", column "
<< (*D.rbegin()).getLocation().asLocation().getInstantiationColumnNumber()
<< "</a></td></tr>\n"
"<tr><td class=\"rowname\">Description:</td><td>"
<< D.getDescription() << "</td></tr>\n";
// Output any other meta data.
for (PathDiagnostic::meta_iterator I=D.meta_begin(), E=D.meta_end();
I!=E; ++I) {
os << "<tr><td></td><td>" << html::EscapeText(*I) << "</td></tr>\n";
}
os << "</table>\n<!-- REPORTSUMMARYEXTRA -->\n"
"<h3>Annotated Source Code</h3>\n";
R.InsertTextBefore(SMgr.getLocForStartOfFile(FID), os.str());
}
// Embed meta-data tags.
{
std::string s;
llvm::raw_string_ostream os(s);
const std::string& BugDesc = D.getDescription();
if (!BugDesc.empty())
os << "\n<!-- BUGDESC " << BugDesc << " -->\n";
const std::string& BugType = D.getBugType();
if (!BugType.empty())
os << "\n<!-- BUGTYPE " << BugType << " -->\n";
const std::string& BugCategory = D.getCategory();
if (!BugCategory.empty())
os << "\n<!-- BUGCATEGORY " << BugCategory << " -->\n";
os << "\n<!-- BUGFILE " << DirName << Entry->getName() << " -->\n";
os << "\n<!-- BUGLINE "
<< D.back()->getLocation().asLocation().getInstantiationLineNumber()
<< " -->\n";
os << "\n<!-- BUGPATHLENGTH " << D.size() << " -->\n";
// Mark the end of the tags.
os << "\n<!-- BUGMETAEND -->\n";
// Insert the text.
R.InsertTextBefore(SMgr.getLocForStartOfFile(FID), os.str());
}
// Add CSS, header, and footer.
html::AddHeaderFooterInternalBuiltinCSS(R, FID, Entry->getName());
// Get the rewrite buffer.
const RewriteBuffer *Buf = R.getRewriteBufferFor(FID);
if (!Buf) {
llvm::errs() << "warning: no diagnostics generated for main file.\n";
return;
}
// Create a path for the target HTML file.
llvm::sys::Path F(FilePrefix);
F.makeUnique(false, NULL);
// Rename the file with an HTML extension.
llvm::sys::Path H(F);
H.appendSuffix("html");
F.renamePathOnDisk(H, NULL);
std::string ErrorMsg;
llvm::raw_fd_ostream os(H.c_str(), ErrorMsg);
if (!ErrorMsg.empty()) {
(llvm::errs() << "warning: could not create file '" << F.str()
<< "'\n").flush();
return;
}
if (FilesMade)
FilesMade->push_back(H.getLast());
// Emit the HTML to disk.
for (RewriteBuffer::iterator I = Buf->begin(), E = Buf->end(); I!=E; ++I)
os << *I;
}
void HTMLDiagnostics::HandlePiece(Rewriter& R, FileID BugFileID,
const PathDiagnosticPiece& P,
unsigned num, unsigned max) {
// For now, just draw a box above the line in question, and emit the
// warning.
FullSourceLoc Pos = P.getLocation().asLocation();
if (!Pos.isValid())
return;
SourceManager &SM = R.getSourceMgr();
assert(&Pos.getManager() == &SM && "SourceManagers are different!");
std::pair<FileID, unsigned> LPosInfo = SM.getDecomposedInstantiationLoc(Pos);
if (LPosInfo.first != BugFileID)
return;
const llvm::MemoryBuffer *Buf = SM.getBuffer(LPosInfo.first);
const char* FileStart = Buf->getBufferStart();
// Compute the column number. Rewind from the current position to the start
// of the line.
unsigned ColNo = SM.getColumnNumber(LPosInfo.first, LPosInfo.second);
const char *TokInstantiationPtr =Pos.getInstantiationLoc().getCharacterData();
const char *LineStart = TokInstantiationPtr-ColNo;
// Compute LineEnd.
const char *LineEnd = TokInstantiationPtr;
const char* FileEnd = Buf->getBufferEnd();
while (*LineEnd != '\n' && LineEnd != FileEnd)
++LineEnd;
// Compute the margin offset by counting tabs and non-tabs.
unsigned PosNo = 0;
for (const char* c = LineStart; c != TokInstantiationPtr; ++c)
PosNo += *c == '\t' ? 8 : 1;
// Create the html for the message.
const char *Kind = 0;
switch (P.getKind()) {
case PathDiagnosticPiece::Event: Kind = "Event"; break;
case PathDiagnosticPiece::ControlFlow: Kind = "Control"; break;
// Setting Kind to "Control" is intentional.
case PathDiagnosticPiece::Macro: Kind = "Control"; break;
}
std::string sbuf;
llvm::raw_string_ostream os(sbuf);
os << "\n<tr><td class=\"num\"></td><td class=\"line\"><div id=\"";
if (num == max)
os << "EndPath";
else
os << "Path" << num;
os << "\" class=\"msg";
if (Kind)
os << " msg" << Kind;
os << "\" style=\"margin-left:" << PosNo << "ex";
// Output a maximum size.
if (!isa<PathDiagnosticMacroPiece>(P)) {
// Get the string and determining its maximum substring.
const std::string& Msg = P.getString();
unsigned max_token = 0;
unsigned cnt = 0;
unsigned len = Msg.size();
for (std::string::const_iterator I=Msg.begin(), E=Msg.end(); I!=E; ++I)
switch (*I) {
default:
++cnt;
continue;
case ' ':
case '\t':
case '\n':
if (cnt > max_token) max_token = cnt;
cnt = 0;
}
if (cnt > max_token)
max_token = cnt;
// Determine the approximate size of the message bubble in em.
unsigned em;
const unsigned max_line = 120;
if (max_token >= max_line)
em = max_token / 2;
else {
unsigned characters = max_line;
unsigned lines = len / max_line;
if (lines > 0) {
for (; characters > max_token; --characters)
if (len / characters > lines) {
++characters;
break;
}
}
em = characters / 2;
}
if (em < max_line/2)
os << "; max-width:" << em << "em";
}
else
os << "; max-width:100em";
os << "\">";
if (max > 1) {
os << "<table class=\"msgT\"><tr><td valign=\"top\">";
os << "<div class=\"PathIndex";
if (Kind) os << " PathIndex" << Kind;
os << "\">" << num << "</div>";
os << "</td><td>";
}
if (const PathDiagnosticMacroPiece *MP =
dyn_cast<PathDiagnosticMacroPiece>(&P)) {
os << "Within the expansion of the macro '";
// Get the name of the macro by relexing it.
{
FullSourceLoc L = MP->getLocation().asLocation().getInstantiationLoc();
assert(L.isFileID());
std::pair<const char*, const char*> BufferInfo = L.getBufferData();
const char* MacroName = L.getDecomposedLoc().second + BufferInfo.first;
Lexer rawLexer(L, PP.getLangOptions(), BufferInfo.first,
MacroName, BufferInfo.second);
Token TheTok;
rawLexer.LexFromRawLexer(TheTok);
for (unsigned i = 0, n = TheTok.getLength(); i < n; ++i)
os << MacroName[i];
}
os << "':\n";
if (max > 1)
os << "</td></tr></table>";
// Within a macro piece. Write out each event.
ProcessMacroPiece(os, *MP, 0);
}
else {
os << html::EscapeText(P.getString());
if (max > 1)
os << "</td></tr></table>";
}
os << "</div></td></tr>";
// Insert the new html.
unsigned DisplayPos = LineEnd - FileStart;
SourceLocation Loc =
SM.getLocForStartOfFile(LPosInfo.first).getFileLocWithOffset(DisplayPos);
R.InsertTextBefore(Loc, os.str());
// Now highlight the ranges.
for (const SourceRange *I = P.ranges_begin(), *E = P.ranges_end();
I != E; ++I)
HighlightRange(R, LPosInfo.first, *I);
#if 0
// If there is a code insertion hint, insert that code.
// FIXME: This code is disabled because it seems to mangle the HTML
// output. I'm leaving it here because it's generally the right idea,
// but needs some help from someone more familiar with the rewriter.
for (const CodeModificationHint *Hint = P.code_modifications_begin(),
*HintEnd = P.code_modifications_end();
Hint != HintEnd; ++Hint) {
if (Hint->RemoveRange.isValid()) {
HighlightRange(R, LPosInfo.first, Hint->RemoveRange,
"<span class=\"CodeRemovalHint\">", "</span>");
}
if (Hint->InsertionLoc.isValid()) {
std::string EscapedCode = html::EscapeText(Hint->CodeToInsert, true);
EscapedCode = "<span class=\"CodeInsertionHint\">" + EscapedCode
+ "</span>";
R.InsertTextBefore(Hint->InsertionLoc, EscapedCode);
}
}
#endif
}
static void EmitAlphaCounter(llvm::raw_ostream& os, unsigned n) {
llvm::SmallVector<char, 10> buf;
do {
unsigned x = n % ('z' - 'a');
buf.push_back('a' + x);
n = n / ('z' - 'a');
} while (n);
assert(!buf.empty());
for (llvm::SmallVectorImpl<char>::reverse_iterator I=buf.rbegin(),
E=buf.rend(); I!=E; ++I)
os << *I;
}
unsigned HTMLDiagnostics::ProcessMacroPiece(llvm::raw_ostream& os,
const PathDiagnosticMacroPiece& P,
unsigned num) {
for (PathDiagnosticMacroPiece::const_iterator I=P.begin(), E=P.end();
I!=E; ++I) {
if (const PathDiagnosticMacroPiece *MP =
dyn_cast<PathDiagnosticMacroPiece>(*I)) {
num = ProcessMacroPiece(os, *MP, num);
continue;
}
if (PathDiagnosticEventPiece *EP = dyn_cast<PathDiagnosticEventPiece>(*I)) {
os << "<div class=\"msg msgEvent\" style=\"width:94%; "
"margin-left:5px\">"
"<table class=\"msgT\"><tr>"
"<td valign=\"top\"><div class=\"PathIndex PathIndexEvent\">";
EmitAlphaCounter(os, num++);
os << "</div></td><td valign=\"top\">"
<< html::EscapeText(EP->getString())
<< "</td></tr></table></div>\n";
}
}
return num;
}
void HTMLDiagnostics::HighlightRange(Rewriter& R, FileID BugFileID,
SourceRange Range,
const char *HighlightStart,
const char *HighlightEnd) {
SourceManager &SM = R.getSourceMgr();
const LangOptions &LangOpts = R.getLangOpts();
SourceLocation InstantiationStart = SM.getInstantiationLoc(Range.getBegin());
unsigned StartLineNo = SM.getInstantiationLineNumber(InstantiationStart);
SourceLocation InstantiationEnd = SM.getInstantiationLoc(Range.getEnd());
unsigned EndLineNo = SM.getInstantiationLineNumber(InstantiationEnd);
if (EndLineNo < StartLineNo)
return;
if (SM.getFileID(InstantiationStart) != BugFileID ||
SM.getFileID(InstantiationEnd) != BugFileID)
return;
// Compute the column number of the end.
unsigned EndColNo = SM.getInstantiationColumnNumber(InstantiationEnd);
unsigned OldEndColNo = EndColNo;
if (EndColNo) {
// Add in the length of the token, so that we cover multi-char tokens.
EndColNo += Lexer::MeasureTokenLength(Range.getEnd(), SM, LangOpts)-1;
}
// Highlight the range. Make the span tag the outermost tag for the
// selected range.
SourceLocation E =
InstantiationEnd.getFileLocWithOffset(EndColNo - OldEndColNo);
html::HighlightRange(R, InstantiationStart, E, HighlightStart, HighlightEnd);
}
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