| 1 | //===--- TransGCCalls.cpp - Transformations 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 "Transforms.h" |
| 10 | #include "Internals.h" |
| 11 | #include "clang/AST/ASTContext.h" |
| 12 | #include "clang/Sema/SemaDiagnostic.h" |
| 13 | |
| 14 | using namespace clang; |
| 15 | using namespace arcmt; |
| 16 | using namespace trans; |
| 17 | |
| 18 | namespace { |
| 19 | |
| 20 | class GCCollectableCallsChecker : |
| 21 | public RecursiveASTVisitor<GCCollectableCallsChecker> { |
| 22 | MigrationContext &MigrateCtx; |
| 23 | IdentifierInfo *NSMakeCollectableII; |
| 24 | IdentifierInfo *CFMakeCollectableII; |
| 25 | |
| 26 | public: |
| 27 | GCCollectableCallsChecker(MigrationContext &ctx) |
| 28 | : MigrateCtx(ctx) { |
| 29 | IdentifierTable &Ids = MigrateCtx.Pass.Ctx.Idents; |
| 30 | NSMakeCollectableII = &Ids.get(Name: "NSMakeCollectable"); |
| 31 | CFMakeCollectableII = &Ids.get(Name: "CFMakeCollectable"); |
| 32 | } |
| 33 | |
| 34 | bool shouldWalkTypesOfTypeLocs() const { return false; } |
| 35 | |
| 36 | bool VisitCallExpr(CallExpr *E) { |
| 37 | TransformActions &TA = MigrateCtx.Pass.TA; |
| 38 | |
| 39 | if (MigrateCtx.isGCOwnedNonObjC(T: E->getType())) { |
| 40 | TA.report(E->getBeginLoc(), diag::warn_arcmt_nsalloc_realloc, |
| 41 | E->getSourceRange()); |
| 42 | return true; |
| 43 | } |
| 44 | |
| 45 | Expr *CEE = E->getCallee()->IgnoreParenImpCasts(); |
| 46 | if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CEE)) { |
| 47 | if (FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(DRE->getDecl())) { |
| 48 | if (!FD->getDeclContext()->getRedeclContext()->isFileContext()) |
| 49 | return true; |
| 50 | |
| 51 | if (FD->getIdentifier() == NSMakeCollectableII) { |
| 52 | Transaction Trans(TA); |
| 53 | TA.clearDiagnostic(diag::err_unavailable, |
| 54 | diag::err_unavailable_message, |
| 55 | diag::err_ovl_deleted_call, // ObjC++ |
| 56 | DRE->getSourceRange()); |
| 57 | TA.replace(DRE->getSourceRange(), "CFBridgingRelease"); |
| 58 | |
| 59 | } else if (FD->getIdentifier() == CFMakeCollectableII) { |
| 60 | TA.reportError(error: "CFMakeCollectable will leak the object that it " |
| 61 | "receives in ARC", loc: DRE->getLocation(), |
| 62 | range: DRE->getSourceRange()); |
| 63 | } |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | return true; |
| 68 | } |
| 69 | }; |
| 70 | |
| 71 | } // anonymous namespace |
| 72 | |
| 73 | void GCCollectableCallsTraverser::traverseBody(BodyContext &BodyCtx) { |
| 74 | GCCollectableCallsChecker(BodyCtx.getMigrationContext()) |
| 75 | .TraverseStmt(S: BodyCtx.getTopStmt()); |
| 76 | } |
| 77 |