1 //===--- ARCMT.cpp - Migration to ARC mode --------------------------------===//
2 //
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
6 //
7 //===----------------------------------------------------------------------===//
8
9 #include "clang/ARCMigrate/ARCMT.h"
10 #include "Internals.h"
11 #include "clang/AST/ASTConsumer.h"
12 #include "clang/Basic/DiagnosticCategories.h"
13 #include "clang/Frontend/ASTUnit.h"
14 #include "clang/Frontend/CompilerInstance.h"
15 #include "clang/Frontend/FrontendAction.h"
16 #include "clang/Frontend/TextDiagnosticPrinter.h"
17 #include "clang/Frontend/Utils.h"
18 #include "clang/Lex/Preprocessor.h"
19 #include "clang/Lex/PreprocessorOptions.h"
20 #include "clang/Rewrite/Core/Rewriter.h"
21 #include "clang/Sema/SemaDiagnostic.h"
22 #include "clang/Serialization/ASTReader.h"
23 #include "llvm/Support/MemoryBuffer.h"
24 #include "llvm/TargetParser/Triple.h"
25 #include <utility>
26 using namespace clang;
27 using namespace arcmt;
28
clearDiagnostic(ArrayRef<unsigned> IDs,SourceRange range)29 bool CapturedDiagList::clearDiagnostic(ArrayRef<unsigned> IDs,
30 SourceRange range) {
31 if (range.isInvalid())
32 return false;
33
34 bool cleared = false;
35 ListTy::iterator I = List.begin();
36 while (I != List.end()) {
37 FullSourceLoc diagLoc = I->getLocation();
38 if ((IDs.empty() || // empty means clear all diagnostics in the range.
39 llvm::is_contained(IDs, I->getID())) &&
40 !diagLoc.isBeforeInTranslationUnitThan(range.getBegin()) &&
41 (diagLoc == range.getEnd() ||
42 diagLoc.isBeforeInTranslationUnitThan(range.getEnd()))) {
43 cleared = true;
44 ListTy::iterator eraseS = I++;
45 if (eraseS->getLevel() != DiagnosticsEngine::Note)
46 while (I != List.end() && I->getLevel() == DiagnosticsEngine::Note)
47 ++I;
48 // Clear the diagnostic and any notes following it.
49 I = List.erase(eraseS, I);
50 continue;
51 }
52
53 ++I;
54 }
55
56 return cleared;
57 }
58
hasDiagnostic(ArrayRef<unsigned> IDs,SourceRange range) const59 bool CapturedDiagList::hasDiagnostic(ArrayRef<unsigned> IDs,
60 SourceRange range) const {
61 if (range.isInvalid())
62 return false;
63
64 ListTy::const_iterator I = List.begin();
65 while (I != List.end()) {
66 FullSourceLoc diagLoc = I->getLocation();
67 if ((IDs.empty() || // empty means any diagnostic in the range.
68 llvm::is_contained(IDs, I->getID())) &&
69 !diagLoc.isBeforeInTranslationUnitThan(range.getBegin()) &&
70 (diagLoc == range.getEnd() ||
71 diagLoc.isBeforeInTranslationUnitThan(range.getEnd()))) {
72 return true;
73 }
74
75 ++I;
76 }
77
78 return false;
79 }
80
reportDiagnostics(DiagnosticsEngine & Diags) const81 void CapturedDiagList::reportDiagnostics(DiagnosticsEngine &Diags) const {
82 for (ListTy::const_iterator I = List.begin(), E = List.end(); I != E; ++I)
83 Diags.Report(*I);
84 }
85
hasErrors() const86 bool CapturedDiagList::hasErrors() const {
87 for (ListTy::const_iterator I = List.begin(), E = List.end(); I != E; ++I)
88 if (I->getLevel() >= DiagnosticsEngine::Error)
89 return true;
90
91 return false;
92 }
93
94 namespace {
95
96 class CaptureDiagnosticConsumer : public DiagnosticConsumer {
97 DiagnosticsEngine &Diags;
98 DiagnosticConsumer &DiagClient;
99 CapturedDiagList &CapturedDiags;
100 bool HasBegunSourceFile;
101 public:
CaptureDiagnosticConsumer(DiagnosticsEngine & diags,DiagnosticConsumer & client,CapturedDiagList & capturedDiags)102 CaptureDiagnosticConsumer(DiagnosticsEngine &diags,
103 DiagnosticConsumer &client,
104 CapturedDiagList &capturedDiags)
105 : Diags(diags), DiagClient(client), CapturedDiags(capturedDiags),
106 HasBegunSourceFile(false) { }
107
BeginSourceFile(const LangOptions & Opts,const Preprocessor * PP)108 void BeginSourceFile(const LangOptions &Opts,
109 const Preprocessor *PP) override {
110 // Pass BeginSourceFile message onto DiagClient on first call.
111 // The corresponding EndSourceFile call will be made from an
112 // explicit call to FinishCapture.
113 if (!HasBegunSourceFile) {
114 DiagClient.BeginSourceFile(Opts, PP);
115 HasBegunSourceFile = true;
116 }
117 }
118
FinishCapture()119 void FinishCapture() {
120 // Call EndSourceFile on DiagClient on completion of capture to
121 // enable VerifyDiagnosticConsumer to check diagnostics *after*
122 // it has received the diagnostic list.
123 if (HasBegunSourceFile) {
124 DiagClient.EndSourceFile();
125 HasBegunSourceFile = false;
126 }
127 }
128
~CaptureDiagnosticConsumer()129 ~CaptureDiagnosticConsumer() override {
130 assert(!HasBegunSourceFile && "FinishCapture not called!");
131 }
132
HandleDiagnostic(DiagnosticsEngine::Level level,const Diagnostic & Info)133 void HandleDiagnostic(DiagnosticsEngine::Level level,
134 const Diagnostic &Info) override {
135 if (DiagnosticIDs::isARCDiagnostic(Info.getID()) ||
136 level >= DiagnosticsEngine::Error || level == DiagnosticsEngine::Note) {
137 if (Info.getLocation().isValid())
138 CapturedDiags.push_back(StoredDiagnostic(level, Info));
139 return;
140 }
141
142 // Non-ARC warnings are ignored.
143 Diags.setLastDiagnosticIgnored(true);
144 }
145 };
146
147 } // end anonymous namespace
148
HasARCRuntime(CompilerInvocation & origCI)149 static bool HasARCRuntime(CompilerInvocation &origCI) {
150 // This duplicates some functionality from Darwin::AddDeploymentTarget
151 // but this function is well defined, so keep it decoupled from the driver
152 // and avoid unrelated complications.
153 llvm::Triple triple(origCI.getTargetOpts().Triple);
154
155 if (triple.isiOS())
156 return triple.getOSMajorVersion() >= 5;
157
158 if (triple.isWatchOS())
159 return true;
160
161 if (triple.getOS() == llvm::Triple::Darwin)
162 return triple.getOSMajorVersion() >= 11;
163
164 if (triple.getOS() == llvm::Triple::MacOSX) {
165 return triple.getOSVersion() >= VersionTuple(10, 7);
166 }
167
168 return false;
169 }
170
171 static CompilerInvocation *
createInvocationForMigration(CompilerInvocation & origCI,const PCHContainerReader & PCHContainerRdr)172 createInvocationForMigration(CompilerInvocation &origCI,
173 const PCHContainerReader &PCHContainerRdr) {
174 std::unique_ptr<CompilerInvocation> CInvok;
175 CInvok.reset(new CompilerInvocation(origCI));
176 PreprocessorOptions &PPOpts = CInvok->getPreprocessorOpts();
177 if (!PPOpts.ImplicitPCHInclude.empty()) {
178 // We can't use a PCH because it was likely built in non-ARC mode and we
179 // want to parse in ARC. Include the original header.
180 FileManager FileMgr(origCI.getFileSystemOpts());
181 IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
182 IntrusiveRefCntPtr<DiagnosticsEngine> Diags(
183 new DiagnosticsEngine(DiagID, &origCI.getDiagnosticOpts(),
184 new IgnoringDiagConsumer()));
185 std::string OriginalFile = ASTReader::getOriginalSourceFile(
186 PPOpts.ImplicitPCHInclude, FileMgr, PCHContainerRdr, *Diags);
187 if (!OriginalFile.empty())
188 PPOpts.Includes.insert(PPOpts.Includes.begin(), OriginalFile);
189 PPOpts.ImplicitPCHInclude.clear();
190 }
191 std::string define = std::string(getARCMTMacroName());
192 define += '=';
193 CInvok->getPreprocessorOpts().addMacroDef(define);
194 CInvok->getLangOpts().ObjCAutoRefCount = true;
195 CInvok->getLangOpts().setGC(LangOptions::NonGC);
196 CInvok->getDiagnosticOpts().ErrorLimit = 0;
197 CInvok->getDiagnosticOpts().PedanticErrors = 0;
198
199 // Ignore -Werror flags when migrating.
200 std::vector<std::string> WarnOpts;
201 for (std::vector<std::string>::iterator
202 I = CInvok->getDiagnosticOpts().Warnings.begin(),
203 E = CInvok->getDiagnosticOpts().Warnings.end(); I != E; ++I) {
204 if (!StringRef(*I).starts_with("error"))
205 WarnOpts.push_back(*I);
206 }
207 WarnOpts.push_back("error=arc-unsafe-retained-assign");
208 CInvok->getDiagnosticOpts().Warnings = std::move(WarnOpts);
209
210 CInvok->getLangOpts().ObjCWeakRuntime = HasARCRuntime(origCI);
211 CInvok->getLangOpts().ObjCWeak = CInvok->getLangOpts().ObjCWeakRuntime;
212
213 return CInvok.release();
214 }
215
emitPremigrationErrors(const CapturedDiagList & arcDiags,DiagnosticOptions * diagOpts,Preprocessor & PP)216 static void emitPremigrationErrors(const CapturedDiagList &arcDiags,
217 DiagnosticOptions *diagOpts,
218 Preprocessor &PP) {
219 TextDiagnosticPrinter printer(llvm::errs(), diagOpts);
220 IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
221 IntrusiveRefCntPtr<DiagnosticsEngine> Diags(
222 new DiagnosticsEngine(DiagID, diagOpts, &printer,
223 /*ShouldOwnClient=*/false));
224 Diags->setSourceManager(&PP.getSourceManager());
225
226 printer.BeginSourceFile(PP.getLangOpts(), &PP);
227 arcDiags.reportDiagnostics(*Diags);
228 printer.EndSourceFile();
229 }
230
231 //===----------------------------------------------------------------------===//
232 // checkForManualIssues.
233 //===----------------------------------------------------------------------===//
234
checkForManualIssues(CompilerInvocation & origCI,const FrontendInputFile & Input,std::shared_ptr<PCHContainerOperations> PCHContainerOps,DiagnosticConsumer * DiagClient,bool emitPremigrationARCErrors,StringRef plistOut)235 bool arcmt::checkForManualIssues(
236 CompilerInvocation &origCI, const FrontendInputFile &Input,
237 std::shared_ptr<PCHContainerOperations> PCHContainerOps,
238 DiagnosticConsumer *DiagClient, bool emitPremigrationARCErrors,
239 StringRef plistOut) {
240 if (!origCI.getLangOpts().ObjC)
241 return false;
242
243 LangOptions::GCMode OrigGCMode = origCI.getLangOpts().getGC();
244 bool NoNSAllocReallocError = origCI.getMigratorOpts().NoNSAllocReallocError;
245 bool NoFinalizeRemoval = origCI.getMigratorOpts().NoFinalizeRemoval;
246
247 std::vector<TransformFn> transforms = arcmt::getAllTransformations(OrigGCMode,
248 NoFinalizeRemoval);
249 assert(!transforms.empty());
250
251 std::unique_ptr<CompilerInvocation> CInvok;
252 CInvok.reset(
253 createInvocationForMigration(origCI, PCHContainerOps->getRawReader()));
254 CInvok->getFrontendOpts().Inputs.clear();
255 CInvok->getFrontendOpts().Inputs.push_back(Input);
256
257 CapturedDiagList capturedDiags;
258
259 assert(DiagClient);
260 IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
261 IntrusiveRefCntPtr<DiagnosticsEngine> Diags(
262 new DiagnosticsEngine(DiagID, &origCI.getDiagnosticOpts(),
263 DiagClient, /*ShouldOwnClient=*/false));
264
265 // Filter of all diagnostics.
266 CaptureDiagnosticConsumer errRec(*Diags, *DiagClient, capturedDiags);
267 Diags->setClient(&errRec, /*ShouldOwnClient=*/false);
268
269 std::unique_ptr<ASTUnit> Unit(ASTUnit::LoadFromCompilerInvocationAction(
270 std::move(CInvok), PCHContainerOps, Diags));
271 if (!Unit) {
272 errRec.FinishCapture();
273 return true;
274 }
275
276 // Don't filter diagnostics anymore.
277 Diags->setClient(DiagClient, /*ShouldOwnClient=*/false);
278
279 ASTContext &Ctx = Unit->getASTContext();
280
281 if (Diags->hasFatalErrorOccurred()) {
282 Diags->Reset();
283 DiagClient->BeginSourceFile(Ctx.getLangOpts(), &Unit->getPreprocessor());
284 capturedDiags.reportDiagnostics(*Diags);
285 DiagClient->EndSourceFile();
286 errRec.FinishCapture();
287 return true;
288 }
289
290 if (emitPremigrationARCErrors)
291 emitPremigrationErrors(capturedDiags, &origCI.getDiagnosticOpts(),
292 Unit->getPreprocessor());
293 if (!plistOut.empty()) {
294 SmallVector<StoredDiagnostic, 8> arcDiags;
295 for (CapturedDiagList::iterator
296 I = capturedDiags.begin(), E = capturedDiags.end(); I != E; ++I)
297 arcDiags.push_back(*I);
298 writeARCDiagsToPlist(std::string(plistOut), arcDiags,
299 Ctx.getSourceManager(), Ctx.getLangOpts());
300 }
301
302 // After parsing of source files ended, we want to reuse the
303 // diagnostics objects to emit further diagnostics.
304 // We call BeginSourceFile because DiagnosticConsumer requires that
305 // diagnostics with source range information are emitted only in between
306 // BeginSourceFile() and EndSourceFile().
307 DiagClient->BeginSourceFile(Ctx.getLangOpts(), &Unit->getPreprocessor());
308
309 // No macros will be added since we are just checking and we won't modify
310 // source code.
311 std::vector<SourceLocation> ARCMTMacroLocs;
312
313 TransformActions testAct(*Diags, capturedDiags, Ctx, Unit->getPreprocessor());
314 MigrationPass pass(Ctx, OrigGCMode, Unit->getSema(), testAct, capturedDiags,
315 ARCMTMacroLocs);
316 pass.setNoFinalizeRemoval(NoFinalizeRemoval);
317 if (!NoNSAllocReallocError)
318 Diags->setSeverity(diag::warn_arcmt_nsalloc_realloc, diag::Severity::Error,
319 SourceLocation());
320
321 for (unsigned i=0, e = transforms.size(); i != e; ++i)
322 transforms[i](pass);
323
324 capturedDiags.reportDiagnostics(*Diags);
325
326 DiagClient->EndSourceFile();
327 errRec.FinishCapture();
328
329 return capturedDiags.hasErrors() || testAct.hasReportedErrors();
330 }
331
332 //===----------------------------------------------------------------------===//
333 // applyTransformations.
334 //===----------------------------------------------------------------------===//
335
336 static bool
applyTransforms(CompilerInvocation & origCI,const FrontendInputFile & Input,std::shared_ptr<PCHContainerOperations> PCHContainerOps,DiagnosticConsumer * DiagClient,StringRef outputDir,bool emitPremigrationARCErrors,StringRef plistOut)337 applyTransforms(CompilerInvocation &origCI, const FrontendInputFile &Input,
338 std::shared_ptr<PCHContainerOperations> PCHContainerOps,
339 DiagnosticConsumer *DiagClient, StringRef outputDir,
340 bool emitPremigrationARCErrors, StringRef plistOut) {
341 if (!origCI.getLangOpts().ObjC)
342 return false;
343
344 LangOptions::GCMode OrigGCMode = origCI.getLangOpts().getGC();
345
346 // Make sure checking is successful first.
347 CompilerInvocation CInvokForCheck(origCI);
348 if (arcmt::checkForManualIssues(CInvokForCheck, Input, PCHContainerOps,
349 DiagClient, emitPremigrationARCErrors,
350 plistOut))
351 return true;
352
353 CompilerInvocation CInvok(origCI);
354 CInvok.getFrontendOpts().Inputs.clear();
355 CInvok.getFrontendOpts().Inputs.push_back(Input);
356
357 MigrationProcess migration(CInvok, PCHContainerOps, DiagClient, outputDir);
358 bool NoFinalizeRemoval = origCI.getMigratorOpts().NoFinalizeRemoval;
359
360 std::vector<TransformFn> transforms = arcmt::getAllTransformations(OrigGCMode,
361 NoFinalizeRemoval);
362 assert(!transforms.empty());
363
364 for (unsigned i=0, e = transforms.size(); i != e; ++i) {
365 bool err = migration.applyTransform(transforms[i]);
366 if (err) return true;
367 }
368
369 IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
370 IntrusiveRefCntPtr<DiagnosticsEngine> Diags(
371 new DiagnosticsEngine(DiagID, &origCI.getDiagnosticOpts(),
372 DiagClient, /*ShouldOwnClient=*/false));
373
374 if (outputDir.empty()) {
375 origCI.getLangOpts().ObjCAutoRefCount = true;
376 return migration.getRemapper().overwriteOriginal(*Diags);
377 } else {
378 return migration.getRemapper().flushToDisk(outputDir, *Diags);
379 }
380 }
381
applyTransformations(CompilerInvocation & origCI,const FrontendInputFile & Input,std::shared_ptr<PCHContainerOperations> PCHContainerOps,DiagnosticConsumer * DiagClient)382 bool arcmt::applyTransformations(
383 CompilerInvocation &origCI, const FrontendInputFile &Input,
384 std::shared_ptr<PCHContainerOperations> PCHContainerOps,
385 DiagnosticConsumer *DiagClient) {
386 return applyTransforms(origCI, Input, PCHContainerOps, DiagClient,
387 StringRef(), false, StringRef());
388 }
389
migrateWithTemporaryFiles(CompilerInvocation & origCI,const FrontendInputFile & Input,std::shared_ptr<PCHContainerOperations> PCHContainerOps,DiagnosticConsumer * DiagClient,StringRef outputDir,bool emitPremigrationARCErrors,StringRef plistOut)390 bool arcmt::migrateWithTemporaryFiles(
391 CompilerInvocation &origCI, const FrontendInputFile &Input,
392 std::shared_ptr<PCHContainerOperations> PCHContainerOps,
393 DiagnosticConsumer *DiagClient, StringRef outputDir,
394 bool emitPremigrationARCErrors, StringRef plistOut) {
395 assert(!outputDir.empty() && "Expected output directory path");
396 return applyTransforms(origCI, Input, PCHContainerOps, DiagClient, outputDir,
397 emitPremigrationARCErrors, plistOut);
398 }
399
getFileRemappings(std::vector<std::pair<std::string,std::string>> & remap,StringRef outputDir,DiagnosticConsumer * DiagClient)400 bool arcmt::getFileRemappings(std::vector<std::pair<std::string,std::string> > &
401 remap,
402 StringRef outputDir,
403 DiagnosticConsumer *DiagClient) {
404 assert(!outputDir.empty());
405
406 IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
407 IntrusiveRefCntPtr<DiagnosticsEngine> Diags(
408 new DiagnosticsEngine(DiagID, new DiagnosticOptions,
409 DiagClient, /*ShouldOwnClient=*/false));
410
411 FileRemapper remapper;
412 bool err = remapper.initFromDisk(outputDir, *Diags,
413 /*ignoreIfFilesChanged=*/true);
414 if (err)
415 return true;
416
417 remapper.forEachMapping(
418 [&](StringRef From, StringRef To) {
419 remap.push_back(std::make_pair(From.str(), To.str()));
420 },
421 [](StringRef, const llvm::MemoryBufferRef &) {});
422
423 return false;
424 }
425
426
427 //===----------------------------------------------------------------------===//
428 // CollectTransformActions.
429 //===----------------------------------------------------------------------===//
430
431 namespace {
432
433 class ARCMTMacroTrackerPPCallbacks : public PPCallbacks {
434 std::vector<SourceLocation> &ARCMTMacroLocs;
435
436 public:
ARCMTMacroTrackerPPCallbacks(std::vector<SourceLocation> & ARCMTMacroLocs)437 ARCMTMacroTrackerPPCallbacks(std::vector<SourceLocation> &ARCMTMacroLocs)
438 : ARCMTMacroLocs(ARCMTMacroLocs) { }
439
MacroExpands(const Token & MacroNameTok,const MacroDefinition & MD,SourceRange Range,const MacroArgs * Args)440 void MacroExpands(const Token &MacroNameTok, const MacroDefinition &MD,
441 SourceRange Range, const MacroArgs *Args) override {
442 if (MacroNameTok.getIdentifierInfo()->getName() == getARCMTMacroName())
443 ARCMTMacroLocs.push_back(MacroNameTok.getLocation());
444 }
445 };
446
447 class ARCMTMacroTrackerAction : public ASTFrontendAction {
448 std::vector<SourceLocation> &ARCMTMacroLocs;
449
450 public:
ARCMTMacroTrackerAction(std::vector<SourceLocation> & ARCMTMacroLocs)451 ARCMTMacroTrackerAction(std::vector<SourceLocation> &ARCMTMacroLocs)
452 : ARCMTMacroLocs(ARCMTMacroLocs) { }
453
CreateASTConsumer(CompilerInstance & CI,StringRef InFile)454 std::unique_ptr<ASTConsumer> CreateASTConsumer(CompilerInstance &CI,
455 StringRef InFile) override {
456 CI.getPreprocessor().addPPCallbacks(
457 std::make_unique<ARCMTMacroTrackerPPCallbacks>(ARCMTMacroLocs));
458 return std::make_unique<ASTConsumer>();
459 }
460 };
461
462 class RewritesApplicator : public TransformActions::RewriteReceiver {
463 Rewriter &rewriter;
464 MigrationProcess::RewriteListener *Listener;
465
466 public:
RewritesApplicator(Rewriter & rewriter,ASTContext & ctx,MigrationProcess::RewriteListener * listener)467 RewritesApplicator(Rewriter &rewriter, ASTContext &ctx,
468 MigrationProcess::RewriteListener *listener)
469 : rewriter(rewriter), Listener(listener) {
470 if (Listener)
471 Listener->start(ctx);
472 }
~RewritesApplicator()473 ~RewritesApplicator() override {
474 if (Listener)
475 Listener->finish();
476 }
477
insert(SourceLocation loc,StringRef text)478 void insert(SourceLocation loc, StringRef text) override {
479 bool err = rewriter.InsertText(loc, text, /*InsertAfter=*/true,
480 /*indentNewLines=*/true);
481 if (!err && Listener)
482 Listener->insert(loc, text);
483 }
484
remove(CharSourceRange range)485 void remove(CharSourceRange range) override {
486 Rewriter::RewriteOptions removeOpts;
487 removeOpts.IncludeInsertsAtBeginOfRange = false;
488 removeOpts.IncludeInsertsAtEndOfRange = false;
489 removeOpts.RemoveLineIfEmpty = true;
490
491 bool err = rewriter.RemoveText(range, removeOpts);
492 if (!err && Listener)
493 Listener->remove(range);
494 }
495
increaseIndentation(CharSourceRange range,SourceLocation parentIndent)496 void increaseIndentation(CharSourceRange range,
497 SourceLocation parentIndent) override {
498 rewriter.IncreaseIndentation(range, parentIndent);
499 }
500 };
501
502 } // end anonymous namespace.
503
504 /// Anchor for VTable.
~RewriteListener()505 MigrationProcess::RewriteListener::~RewriteListener() { }
506
MigrationProcess(CompilerInvocation & CI,std::shared_ptr<PCHContainerOperations> PCHContainerOps,DiagnosticConsumer * diagClient,StringRef outputDir)507 MigrationProcess::MigrationProcess(
508 CompilerInvocation &CI,
509 std::shared_ptr<PCHContainerOperations> PCHContainerOps,
510 DiagnosticConsumer *diagClient, StringRef outputDir)
511 : OrigCI(CI), PCHContainerOps(std::move(PCHContainerOps)),
512 DiagClient(diagClient), HadARCErrors(false) {
513 if (!outputDir.empty()) {
514 IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
515 IntrusiveRefCntPtr<DiagnosticsEngine> Diags(
516 new DiagnosticsEngine(DiagID, &CI.getDiagnosticOpts(),
517 DiagClient, /*ShouldOwnClient=*/false));
518 Remapper.initFromDisk(outputDir, *Diags, /*ignoreIfFilesChanged=*/true);
519 }
520 }
521
applyTransform(TransformFn trans,RewriteListener * listener)522 bool MigrationProcess::applyTransform(TransformFn trans,
523 RewriteListener *listener) {
524 std::unique_ptr<CompilerInvocation> CInvok;
525 CInvok.reset(
526 createInvocationForMigration(OrigCI, PCHContainerOps->getRawReader()));
527 CInvok->getDiagnosticOpts().IgnoreWarnings = true;
528
529 Remapper.applyMappings(CInvok->getPreprocessorOpts());
530
531 CapturedDiagList capturedDiags;
532 std::vector<SourceLocation> ARCMTMacroLocs;
533
534 assert(DiagClient);
535 IntrusiveRefCntPtr<DiagnosticIDs> DiagID(new DiagnosticIDs());
536 IntrusiveRefCntPtr<DiagnosticsEngine> Diags(
537 new DiagnosticsEngine(DiagID, new DiagnosticOptions,
538 DiagClient, /*ShouldOwnClient=*/false));
539
540 // Filter of all diagnostics.
541 CaptureDiagnosticConsumer errRec(*Diags, *DiagClient, capturedDiags);
542 Diags->setClient(&errRec, /*ShouldOwnClient=*/false);
543
544 std::unique_ptr<ARCMTMacroTrackerAction> ASTAction;
545 ASTAction.reset(new ARCMTMacroTrackerAction(ARCMTMacroLocs));
546
547 std::unique_ptr<ASTUnit> Unit(ASTUnit::LoadFromCompilerInvocationAction(
548 std::move(CInvok), PCHContainerOps, Diags, ASTAction.get()));
549 if (!Unit) {
550 errRec.FinishCapture();
551 return true;
552 }
553 Unit->setOwnsRemappedFileBuffers(false); // FileRemapper manages that.
554
555 HadARCErrors = HadARCErrors || capturedDiags.hasErrors();
556
557 // Don't filter diagnostics anymore.
558 Diags->setClient(DiagClient, /*ShouldOwnClient=*/false);
559
560 ASTContext &Ctx = Unit->getASTContext();
561
562 if (Diags->hasFatalErrorOccurred()) {
563 Diags->Reset();
564 DiagClient->BeginSourceFile(Ctx.getLangOpts(), &Unit->getPreprocessor());
565 capturedDiags.reportDiagnostics(*Diags);
566 DiagClient->EndSourceFile();
567 errRec.FinishCapture();
568 return true;
569 }
570
571 // After parsing of source files ended, we want to reuse the
572 // diagnostics objects to emit further diagnostics.
573 // We call BeginSourceFile because DiagnosticConsumer requires that
574 // diagnostics with source range information are emitted only in between
575 // BeginSourceFile() and EndSourceFile().
576 DiagClient->BeginSourceFile(Ctx.getLangOpts(), &Unit->getPreprocessor());
577
578 Rewriter rewriter(Ctx.getSourceManager(), Ctx.getLangOpts());
579 TransformActions TA(*Diags, capturedDiags, Ctx, Unit->getPreprocessor());
580 MigrationPass pass(Ctx, OrigCI.getLangOpts().getGC(),
581 Unit->getSema(), TA, capturedDiags, ARCMTMacroLocs);
582
583 trans(pass);
584
585 {
586 RewritesApplicator applicator(rewriter, Ctx, listener);
587 TA.applyRewrites(applicator);
588 }
589
590 DiagClient->EndSourceFile();
591 errRec.FinishCapture();
592
593 if (DiagClient->getNumErrors())
594 return true;
595
596 for (Rewriter::buffer_iterator
597 I = rewriter.buffer_begin(), E = rewriter.buffer_end(); I != E; ++I) {
598 FileID FID = I->first;
599 RewriteBuffer &buf = I->second;
600 OptionalFileEntryRef file =
601 Ctx.getSourceManager().getFileEntryRefForID(FID);
602 assert(file);
603 std::string newFname = std::string(file->getName());
604 newFname += "-trans";
605 SmallString<512> newText;
606 llvm::raw_svector_ostream vecOS(newText);
607 buf.write(vecOS);
608 std::unique_ptr<llvm::MemoryBuffer> memBuf(
609 llvm::MemoryBuffer::getMemBufferCopy(newText.str(), newFname));
610 SmallString<64> filePath(file->getName());
611 Unit->getFileManager().FixupRelativePath(filePath);
612 Remapper.remap(filePath.str(), std::move(memBuf));
613 }
614
615 return false;
616 }
617