clang 19.0.0git
TransGCCalls.cpp
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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"
13
14using namespace clang;
15using namespace arcmt;
16using namespace trans;
17
18namespace {
19
20class GCCollectableCallsChecker :
21 public RecursiveASTVisitor<GCCollectableCallsChecker> {
22 MigrationContext &MigrateCtx;
23 IdentifierInfo *NSMakeCollectableII;
24 IdentifierInfo *CFMakeCollectableII;
25
26public:
27 GCCollectableCallsChecker(MigrationContext &ctx)
28 : MigrateCtx(ctx) {
29 IdentifierTable &Ids = MigrateCtx.Pass.Ctx.Idents;
30 NSMakeCollectableII = &Ids.get("NSMakeCollectable");
31 CFMakeCollectableII = &Ids.get("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(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("CFMakeCollectable will leak the object that it "
61 "receives in ARC", DRE->getLocation(),
62 DRE->getSourceRange());
63 }
64 }
65 }
66
67 return true;
68 }
69};
70
71} // anonymous namespace
72
74 GCCollectableCallsChecker(BodyCtx.getMigrationContext())
75 .TraverseStmt(BodyCtx.getTopStmt());
76}
Defines the clang::ASTContext interface.
IdentifierTable & Idents
Definition: ASTContext.h:639
CallExpr - Represents a function call (C99 6.5.2.2, C++ [expr.call]).
Definition: Expr.h:2808
SourceLocation getBeginLoc() const LLVM_READONLY
Definition: Expr.cpp:1615
Expr * getCallee()
Definition: Expr.h:2958
A reference to a declared variable, function, enum, etc.
Definition: Expr.h:1260
This represents one expression.
Definition: Expr.h:110
Expr * IgnoreParenImpCasts() LLVM_READONLY
Skip past any parentheses and implicit casts which might surround this expression until reaching a fi...
Definition: Expr.cpp:3042
QualType getType() const
Definition: Expr.h:142
Represents a function declaration or definition.
Definition: Decl.h:1959
One of these records is kept for each identifier that is lexed.
Implements an efficient mapping from strings to IdentifierInfo nodes.
IdentifierInfo & get(StringRef Name)
Return the identifier token info for the specified named identifier.
A class that does preorder or postorder depth-first traversal on the entire Clang AST and visits each...
bool shouldWalkTypesOfTypeLocs() const
Return whether this visitor should recurse into the types of TypeLocs.
SourceRange getSourceRange() const LLVM_READONLY
SourceLocation tokens are not useful in isolation - they are low level value objects created/interpre...
Definition: Stmt.cpp:326
TransformActions & TA
Definition: Internals.h:152
DiagnosticBuilder report(SourceLocation loc, unsigned diagId, SourceRange range=SourceRange())
bool clearDiagnostic(ArrayRef< unsigned > IDs, SourceRange range)
void reportError(StringRef error, SourceLocation loc, SourceRange range=SourceRange())
void replace(SourceRange range, StringRef text)
MigrationContext & getMigrationContext()
Definition: Transforms.h:54
void traverseBody(BodyContext &BodyCtx) override
The JSON file list parser is used to communicate input to InstallAPI.