ARCMT.cpp revision 26f0e4e7ab534fb42485c930f20a424ecc8c9830 
1//===--- ARCMT.cpp - Migration to ARC mode --------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "Internals.h"
11#include "clang/Frontend/ASTUnit.h"
12#include "clang/Frontend/CompilerInstance.h"
13#include "clang/Frontend/FrontendAction.h"
14#include "clang/Frontend/TextDiagnosticPrinter.h"
15#include "clang/Frontend/Utils.h"
16#include "clang/AST/ASTConsumer.h"
17#include "clang/Rewrite/Rewriter.h"
18#include "clang/Sema/SemaDiagnostic.h"
19#include "clang/Basic/DiagnosticCategories.h"
20#include "clang/Lex/Preprocessor.h"
21#include "llvm/Support/MemoryBuffer.h"
22#include "llvm/ADT/Triple.h"
23using namespace clang;
24using namespace arcmt;
25
26bool CapturedDiagList::clearDiagnostic(ArrayRef<unsigned> IDs,
27                                       SourceRange range) {
28  if (range.isInvalid())
29    return false;
30
31  bool cleared = false;
32  ListTy::iterator I = List.begin();
33  while (I != List.end()) {
34    FullSourceLoc diagLoc = I->getLocation();
35    if ((IDs.empty() || // empty means clear all diagnostics in the range.
36         std::find(IDs.begin(), IDs.end(), I->getID()) != IDs.end()) &&
37        !diagLoc.isBeforeInTranslationUnitThan(range.getBegin()) &&
38        (diagLoc == range.getEnd() ||
39           diagLoc.isBeforeInTranslationUnitThan(range.getEnd()))) {
40      cleared = true;
41      ListTy::iterator eraseS = I++;
42      while (I != List.end() && I->getLevel() == DiagnosticsEngine::Note)
43        ++I;
44      // Clear the diagnostic and any notes following it.
45      List.erase(eraseS, I);
46      continue;
47    }
48
49    ++I;
50  }
51
52  return cleared;
53}
54
55bool CapturedDiagList::hasDiagnostic(ArrayRef<unsigned> IDs,
56                                     SourceRange range) const {
57  if (range.isInvalid())
58    return false;
59
60  ListTy::const_iterator I = List.begin();
61  while (I != List.end()) {
62    FullSourceLoc diagLoc = I->getLocation();
63    if ((IDs.empty() || // empty means any diagnostic in the range.
64         std::find(IDs.begin(), IDs.end(), I->getID()) != IDs.end()) &&
65        !diagLoc.isBeforeInTranslationUnitThan(range.getBegin()) &&
66        (diagLoc == range.getEnd() ||
67           diagLoc.isBeforeInTranslationUnitThan(range.getEnd()))) {
68      return true;
69    }
70
71    ++I;
72  }
73
74  return false;
75}
76
77void CapturedDiagList::reportDiagnostics(DiagnosticsEngine &Diags) const {
78  for (ListTy::const_iterator I = List.begin(), E = List.end(); I != E; ++I)
79    Diags.Report(*I);
80}
81
82bool CapturedDiagList::hasErrors() const {
83  for (ListTy::const_iterator I = List.begin(), E = List.end(); I != E; ++I)
84    if (I->getLevel() >= DiagnosticsEngine::Error)
85      return true;
86
87  return false;
88}
89
90namespace {
91
92class CaptureDiagnosticConsumer : public DiagnosticConsumer {
93  DiagnosticsEngine &Diags;
94  CapturedDiagList &CapturedDiags;
95public:
96  CaptureDiagnosticConsumer(DiagnosticsEngine &diags,
97                           CapturedDiagList &capturedDiags)
98    : Diags(diags), CapturedDiags(capturedDiags) { }
99
100  virtual void HandleDiagnostic(DiagnosticsEngine::Level level,
101                                const Diagnostic &Info) {
102    if (DiagnosticIDs::isARCDiagnostic(Info.getID()) ||
103        level >= DiagnosticsEngine::Error || level == DiagnosticsEngine::Note) {
104      CapturedDiags.push_back(StoredDiagnostic(level, Info));
105      return;
106    }
107
108    // Non-ARC warnings are ignored.
109    Diags.setLastDiagnosticIgnored();
110  }
111
112  DiagnosticConsumer *clone(DiagnosticsEngine &Diags) const {
113    // Just drop any diagnostics that come from cloned consumers; they'll
114    // have different source managers anyway.
115    return new IgnoringDiagConsumer();
116  }
117};
118
119} // end anonymous namespace
120
121static inline StringRef SimulatorVersionDefineName() {
122  return "__IPHONE_OS_VERSION_MIN_REQUIRED=";
123}
124
125/// \brief Parse the simulator version define:
126/// __IPHONE_OS_VERSION_MIN_REQUIRED=([0-9])([0-9][0-9])([0-9][0-9])
127// and return the grouped values as integers, e.g:
128//   __IPHONE_OS_VERSION_MIN_REQUIRED=40201
129// will return Major=4, Minor=2, Micro=1.
130static bool GetVersionFromSimulatorDefine(StringRef define,
131                                          unsigned &Major, unsigned &Minor,
132                                          unsigned &Micro) {
133  assert(define.startswith(SimulatorVersionDefineName()));
134  StringRef name, version;
135  llvm::tie(name, version) = define.split('=');
136  if (version.empty())
137    return false;
138  std::string verstr = version.str();
139  char *end;
140  unsigned num = (unsigned) strtol(verstr.c_str(), &end, 10);
141  if (*end != '\0')
142    return false;
143  Major = num / 10000;
144  num = num % 10000;
145  Minor = num / 100;
146  Micro = num % 100;
147  return true;
148}
149
150static bool HasARCRuntime(CompilerInvocation &origCI) {
151  // This duplicates some functionality from Darwin::AddDeploymentTarget
152  // but this function is well defined, so keep it decoupled from the driver
153  // and avoid unrelated complications.
154
155  for (unsigned i = 0, e = origCI.getPreprocessorOpts().Macros.size();
156         i != e; ++i) {
157    StringRef define = origCI.getPreprocessorOpts().Macros[i].first;
158    bool isUndef = origCI.getPreprocessorOpts().Macros[i].second;
159    if (isUndef)
160      continue;
161    if (!define.startswith(SimulatorVersionDefineName()))
162      continue;
163    unsigned Major = 0, Minor = 0, Micro = 0;
164    if (GetVersionFromSimulatorDefine(define, Major, Minor, Micro) &&
165        Major < 10 && Minor < 100 && Micro < 100)
166      return Major >= 5;
167  }
168
169  llvm::Triple triple(origCI.getTargetOpts().Triple);
170
171  if (triple.getOS() == llvm::Triple::IOS)
172    return triple.getOSMajorVersion() >= 5;
173
174  if (triple.getOS() == llvm::Triple::Darwin)
175    return triple.getOSMajorVersion() >= 11;
176
177  if (triple.getOS() == llvm::Triple::MacOSX) {
178    unsigned Major, Minor, Micro;
179    triple.getOSVersion(Major, Minor, Micro);
180    return Major > 10 || (Major == 10 && Minor >= 7);
181  }
182
183  return false;
184}
185
186static CompilerInvocation *
187createInvocationForMigration(CompilerInvocation &origCI) {
188  llvm::OwningPtr<CompilerInvocation> CInvok;
189  CInvok.reset(new CompilerInvocation(origCI));
190  CInvok->getPreprocessorOpts().ImplicitPCHInclude = std::string();
191  CInvok->getPreprocessorOpts().ImplicitPTHInclude = std::string();
192  std::string define = getARCMTMacroName();
193  define += '=';
194  CInvok->getPreprocessorOpts().addMacroDef(define);
195  CInvok->getLangOpts()->ObjCAutoRefCount = true;
196  CInvok->getLangOpts()->setGC(LangOptions::NonGC);
197  CInvok->getDiagnosticOpts().ErrorLimit = 0;
198  CInvok->getDiagnosticOpts().Warnings.push_back(
199                                            "error=arc-unsafe-retained-assign");
200  CInvok->getLangOpts()->ObjCRuntimeHasWeak = HasARCRuntime(origCI);
201
202  return CInvok.take();
203}
204
205static void emitPremigrationErrors(const CapturedDiagList &arcDiags,
206                                   const DiagnosticOptions &diagOpts,
207                                   Preprocessor &PP) {
208  TextDiagnosticPrinter printer(llvm::errs(), diagOpts);
209  llvm::IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
210  llvm::IntrusiveRefCntPtr<DiagnosticsEngine> Diags(
211      new DiagnosticsEngine(DiagID, &printer, /*ShouldOwnClient=*/false));
212  Diags->setSourceManager(&PP.getSourceManager());
213
214  printer.BeginSourceFile(PP.getLangOptions(), &PP);
215  arcDiags.reportDiagnostics(*Diags);
216  printer.EndSourceFile();
217}
218
219//===----------------------------------------------------------------------===//
220// checkForManualIssues.
221//===----------------------------------------------------------------------===//
222
223bool arcmt::checkForManualIssues(CompilerInvocation &origCI,
224                                 const FrontendInputFile &Input,
225                                 DiagnosticConsumer *DiagClient,
226                                 bool emitPremigrationARCErrors,
227                                 StringRef plistOut) {
228  if (!origCI.getLangOpts()->ObjC1)
229    return false;
230
231  LangOptions::GCMode OrigGCMode = origCI.getLangOpts()->getGC();
232  bool NoNSAllocReallocError = origCI.getMigratorOpts().NoNSAllocReallocError;
233  bool NoFinalizeRemoval = origCI.getMigratorOpts().NoFinalizeRemoval;
234
235  std::vector<TransformFn> transforms = arcmt::getAllTransformations(OrigGCMode);
236  assert(!transforms.empty());
237
238  llvm::OwningPtr<CompilerInvocation> CInvok;
239  CInvok.reset(createInvocationForMigration(origCI));
240  CInvok->getFrontendOpts().Inputs.clear();
241  CInvok->getFrontendOpts().Inputs.push_back(Input);
242
243  CapturedDiagList capturedDiags;
244
245  assert(DiagClient);
246  llvm::IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
247  llvm::IntrusiveRefCntPtr<DiagnosticsEngine> Diags(
248      new DiagnosticsEngine(DiagID, DiagClient, /*ShouldOwnClient=*/false));
249
250  // Filter of all diagnostics.
251  CaptureDiagnosticConsumer errRec(*Diags, capturedDiags);
252  Diags->setClient(&errRec, /*ShouldOwnClient=*/false);
253
254  llvm::OwningPtr<ASTUnit> Unit(
255      ASTUnit::LoadFromCompilerInvocationAction(CInvok.take(), Diags));
256  if (!Unit)
257    return true;
258
259  // Don't filter diagnostics anymore.
260  Diags->setClient(DiagClient, /*ShouldOwnClient=*/false);
261
262  ASTContext &Ctx = Unit->getASTContext();
263
264  if (Diags->hasFatalErrorOccurred()) {
265    Diags->Reset();
266    DiagClient->BeginSourceFile(Ctx.getLangOptions(), &Unit->getPreprocessor());
267    capturedDiags.reportDiagnostics(*Diags);
268    DiagClient->EndSourceFile();
269    return true;
270  }
271
272  if (emitPremigrationARCErrors)
273    emitPremigrationErrors(capturedDiags, origCI.getDiagnosticOpts(),
274                           Unit->getPreprocessor());
275  if (!plistOut.empty()) {
276    SmallVector<StoredDiagnostic, 8> arcDiags;
277    for (CapturedDiagList::iterator
278           I = capturedDiags.begin(), E = capturedDiags.end(); I != E; ++I)
279      arcDiags.push_back(*I);
280    writeARCDiagsToPlist(plistOut, arcDiags,
281                         Ctx.getSourceManager(), Ctx.getLangOptions());
282  }
283
284  // After parsing of source files ended, we want to reuse the
285  // diagnostics objects to emit further diagnostics.
286  // We call BeginSourceFile because DiagnosticConsumer requires that
287  // diagnostics with source range information are emitted only in between
288  // BeginSourceFile() and EndSourceFile().
289  DiagClient->BeginSourceFile(Ctx.getLangOptions(), &Unit->getPreprocessor());
290
291  // No macros will be added since we are just checking and we won't modify
292  // source code.
293  std::vector<SourceLocation> ARCMTMacroLocs;
294
295  TransformActions testAct(*Diags, capturedDiags, Ctx, Unit->getPreprocessor());
296  MigrationPass pass(Ctx, OrigGCMode, Unit->getSema(), testAct, ARCMTMacroLocs);
297  pass.setNSAllocReallocError(NoNSAllocReallocError);
298  pass.setNoFinalizeRemoval(NoFinalizeRemoval);
299
300  for (unsigned i=0, e = transforms.size(); i != e; ++i)
301    transforms[i](pass);
302
303  capturedDiags.reportDiagnostics(*Diags);
304
305  DiagClient->EndSourceFile();
306
307  // If we are migrating code that gets the '-fobjc-arc' flag, make sure
308  // to remove it so that we don't get errors from normal compilation.
309  origCI.getLangOpts()->ObjCAutoRefCount = false;
310
311  return capturedDiags.hasErrors() || testAct.hasReportedErrors();
312}
313
314//===----------------------------------------------------------------------===//
315// applyTransformations.
316//===----------------------------------------------------------------------===//
317
318static bool applyTransforms(CompilerInvocation &origCI,
319                            const FrontendInputFile &Input,
320                            DiagnosticConsumer *DiagClient,
321                            StringRef outputDir,
322                            bool emitPremigrationARCErrors,
323                            StringRef plistOut) {
324  if (!origCI.getLangOpts()->ObjC1)
325    return false;
326
327  LangOptions::GCMode OrigGCMode = origCI.getLangOpts()->getGC();
328
329  // Make sure checking is successful first.
330  CompilerInvocation CInvokForCheck(origCI);
331  if (arcmt::checkForManualIssues(CInvokForCheck, Input, DiagClient,
332                                  emitPremigrationARCErrors, plistOut))
333    return true;
334
335  CompilerInvocation CInvok(origCI);
336  CInvok.getFrontendOpts().Inputs.clear();
337  CInvok.getFrontendOpts().Inputs.push_back(Input);
338
339  MigrationProcess migration(CInvok, DiagClient, outputDir);
340
341  std::vector<TransformFn> transforms = arcmt::getAllTransformations(OrigGCMode);
342  assert(!transforms.empty());
343
344  for (unsigned i=0, e = transforms.size(); i != e; ++i) {
345    bool err = migration.applyTransform(transforms[i]);
346    if (err) return true;
347  }
348
349  llvm::IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
350  llvm::IntrusiveRefCntPtr<DiagnosticsEngine> Diags(
351      new DiagnosticsEngine(DiagID, DiagClient, /*ShouldOwnClient=*/false));
352
353  if (outputDir.empty()) {
354    origCI.getLangOpts()->ObjCAutoRefCount = true;
355    return migration.getRemapper().overwriteOriginal(*Diags);
356  } else {
357    // If we are migrating code that gets the '-fobjc-arc' flag, make sure
358    // to remove it so that we don't get errors from normal compilation.
359    origCI.getLangOpts()->ObjCAutoRefCount = false;
360    return migration.getRemapper().flushToDisk(outputDir, *Diags);
361  }
362}
363
364bool arcmt::applyTransformations(CompilerInvocation &origCI,
365                                 const FrontendInputFile &Input,
366                                 DiagnosticConsumer *DiagClient) {
367  return applyTransforms(origCI, Input, DiagClient,
368                         StringRef(), false, StringRef());
369}
370
371bool arcmt::migrateWithTemporaryFiles(CompilerInvocation &origCI,
372                                      const FrontendInputFile &Input,
373                                      DiagnosticConsumer *DiagClient,
374                                      StringRef outputDir,
375                                      bool emitPremigrationARCErrors,
376                                      StringRef plistOut) {
377  assert(!outputDir.empty() && "Expected output directory path");
378  return applyTransforms(origCI, Input, DiagClient,
379                         outputDir, emitPremigrationARCErrors, plistOut);
380}
381
382bool arcmt::getFileRemappings(std::vector<std::pair<std::string,std::string> > &
383                                  remap,
384                              StringRef outputDir,
385                              DiagnosticConsumer *DiagClient) {
386  assert(!outputDir.empty());
387
388  llvm::IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
389  llvm::IntrusiveRefCntPtr<DiagnosticsEngine> Diags(
390      new DiagnosticsEngine(DiagID, DiagClient, /*ShouldOwnClient=*/false));
391
392  FileRemapper remapper;
393  bool err = remapper.initFromDisk(outputDir, *Diags,
394                                   /*ignoreIfFilesChanged=*/true);
395  if (err)
396    return true;
397
398  CompilerInvocation CI;
399  remapper.applyMappings(CI);
400  remap = CI.getPreprocessorOpts().RemappedFiles;
401
402  return false;
403}
404
405//===----------------------------------------------------------------------===//
406// CollectTransformActions.
407//===----------------------------------------------------------------------===//
408
409namespace {
410
411class ARCMTMacroTrackerPPCallbacks : public PPCallbacks {
412  std::vector<SourceLocation> &ARCMTMacroLocs;
413
414public:
415  ARCMTMacroTrackerPPCallbacks(std::vector<SourceLocation> &ARCMTMacroLocs)
416    : ARCMTMacroLocs(ARCMTMacroLocs) { }
417
418  virtual void MacroExpands(const Token &MacroNameTok, const MacroInfo *MI,
419                            SourceRange Range) {
420    if (MacroNameTok.getIdentifierInfo()->getName() == getARCMTMacroName())
421      ARCMTMacroLocs.push_back(MacroNameTok.getLocation());
422  }
423};
424
425class ARCMTMacroTrackerAction : public ASTFrontendAction {
426  std::vector<SourceLocation> &ARCMTMacroLocs;
427
428public:
429  ARCMTMacroTrackerAction(std::vector<SourceLocation> &ARCMTMacroLocs)
430    : ARCMTMacroLocs(ARCMTMacroLocs) { }
431
432  virtual ASTConsumer *CreateASTConsumer(CompilerInstance &CI,
433                                         StringRef InFile) {
434    CI.getPreprocessor().addPPCallbacks(
435                              new ARCMTMacroTrackerPPCallbacks(ARCMTMacroLocs));
436    return new ASTConsumer();
437  }
438};
439
440class RewritesApplicator : public TransformActions::RewriteReceiver {
441  Rewriter &rewriter;
442  ASTContext &Ctx;
443  MigrationProcess::RewriteListener *Listener;
444
445public:
446  RewritesApplicator(Rewriter &rewriter, ASTContext &ctx,
447                     MigrationProcess::RewriteListener *listener)
448    : rewriter(rewriter), Ctx(ctx), Listener(listener) {
449    if (Listener)
450      Listener->start(ctx);
451  }
452  ~RewritesApplicator() {
453    if (Listener)
454      Listener->finish();
455  }
456
457  virtual void insert(SourceLocation loc, StringRef text) {
458    bool err = rewriter.InsertText(loc, text, /*InsertAfter=*/true,
459                                   /*indentNewLines=*/true);
460    if (!err && Listener)
461      Listener->insert(loc, text);
462  }
463
464  virtual void remove(CharSourceRange range) {
465    Rewriter::RewriteOptions removeOpts;
466    removeOpts.IncludeInsertsAtBeginOfRange = false;
467    removeOpts.IncludeInsertsAtEndOfRange = false;
468    removeOpts.RemoveLineIfEmpty = true;
469
470    bool err = rewriter.RemoveText(range, removeOpts);
471    if (!err && Listener)
472      Listener->remove(range);
473  }
474
475  virtual void increaseIndentation(CharSourceRange range,
476                                    SourceLocation parentIndent) {
477    rewriter.IncreaseIndentation(range, parentIndent);
478  }
479};
480
481} // end anonymous namespace.
482
483/// \brief Anchor for VTable.
484MigrationProcess::RewriteListener::~RewriteListener() { }
485
486MigrationProcess::MigrationProcess(const CompilerInvocation &CI,
487                                   DiagnosticConsumer *diagClient,
488                                   StringRef outputDir)
489  : OrigCI(CI), DiagClient(diagClient) {
490  if (!outputDir.empty()) {
491    llvm::IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
492    llvm::IntrusiveRefCntPtr<DiagnosticsEngine> Diags(
493      new DiagnosticsEngine(DiagID, DiagClient, /*ShouldOwnClient=*/false));
494    Remapper.initFromDisk(outputDir, *Diags, /*ignoreIfFilesChanges=*/true);
495  }
496}
497
498bool MigrationProcess::applyTransform(TransformFn trans,
499                                      RewriteListener *listener) {
500  llvm::OwningPtr<CompilerInvocation> CInvok;
501  CInvok.reset(createInvocationForMigration(OrigCI));
502  CInvok->getDiagnosticOpts().IgnoreWarnings = true;
503
504  Remapper.applyMappings(*CInvok);
505
506  CapturedDiagList capturedDiags;
507  std::vector<SourceLocation> ARCMTMacroLocs;
508
509  assert(DiagClient);
510  llvm::IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
511  llvm::IntrusiveRefCntPtr<DiagnosticsEngine> Diags(
512      new DiagnosticsEngine(DiagID, DiagClient, /*ShouldOwnClient=*/false));
513
514  // Filter of all diagnostics.
515  CaptureDiagnosticConsumer errRec(*Diags, capturedDiags);
516  Diags->setClient(&errRec, /*ShouldOwnClient=*/false);
517
518  llvm::OwningPtr<ARCMTMacroTrackerAction> ASTAction;
519  ASTAction.reset(new ARCMTMacroTrackerAction(ARCMTMacroLocs));
520
521  llvm::OwningPtr<ASTUnit> Unit(
522      ASTUnit::LoadFromCompilerInvocationAction(CInvok.take(), Diags,
523                                                ASTAction.get()));
524  if (!Unit)
525    return true;
526  Unit->setOwnsRemappedFileBuffers(false); // FileRemapper manages that.
527
528  // Don't filter diagnostics anymore.
529  Diags->setClient(DiagClient, /*ShouldOwnClient=*/false);
530
531  ASTContext &Ctx = Unit->getASTContext();
532
533  if (Diags->hasFatalErrorOccurred()) {
534    Diags->Reset();
535    DiagClient->BeginSourceFile(Ctx.getLangOptions(), &Unit->getPreprocessor());
536    capturedDiags.reportDiagnostics(*Diags);
537    DiagClient->EndSourceFile();
538    return true;
539  }
540
541  // After parsing of source files ended, we want to reuse the
542  // diagnostics objects to emit further diagnostics.
543  // We call BeginSourceFile because DiagnosticConsumer requires that
544  // diagnostics with source range information are emitted only in between
545  // BeginSourceFile() and EndSourceFile().
546  DiagClient->BeginSourceFile(Ctx.getLangOptions(), &Unit->getPreprocessor());
547
548  Rewriter rewriter(Ctx.getSourceManager(), Ctx.getLangOptions());
549  TransformActions TA(*Diags, capturedDiags, Ctx, Unit->getPreprocessor());
550  MigrationPass pass(Ctx, OrigCI.getLangOpts()->getGC(),
551                     Unit->getSema(), TA, ARCMTMacroLocs);
552
553  trans(pass);
554
555  {
556    RewritesApplicator applicator(rewriter, Ctx, listener);
557    TA.applyRewrites(applicator);
558  }
559
560  DiagClient->EndSourceFile();
561
562  if (DiagClient->getNumErrors())
563    return true;
564
565  for (Rewriter::buffer_iterator
566        I = rewriter.buffer_begin(), E = rewriter.buffer_end(); I != E; ++I) {
567    FileID FID = I->first;
568    RewriteBuffer &buf = I->second;
569    const FileEntry *file = Ctx.getSourceManager().getFileEntryForID(FID);
570    assert(file);
571    std::string newFname = file->getName();
572    newFname += "-trans";
573    llvm::SmallString<512> newText;
574    llvm::raw_svector_ostream vecOS(newText);
575    buf.write(vecOS);
576    vecOS.flush();
577    llvm::MemoryBuffer *memBuf = llvm::MemoryBuffer::getMemBufferCopy(
578                   StringRef(newText.data(), newText.size()), newFname);
579    llvm::SmallString<64> filePath(file->getName());
580    Unit->getFileManager().FixupRelativePath(filePath);
581    Remapper.remap(filePath.str(), memBuf);
582  }
583
584  return false;
585}
586