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//===--- TransGCCalls.cpp - Tranformations to ARC mode --------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "Transforms.h"
#include "Internals.h"
#include "clang/Sema/SemaDiagnostic.h"
using namespace clang;
using namespace arcmt;
using namespace trans;
namespace {
class GCCollectableCallsChecker :
public RecursiveASTVisitor<GCCollectableCallsChecker> {
MigrationContext &MigrateCtx;
ParentMap &PMap;
IdentifierInfo *NSMakeCollectableII;
IdentifierInfo *CFMakeCollectableII;
public:
GCCollectableCallsChecker(MigrationContext &ctx, ParentMap &map)
: MigrateCtx(ctx), PMap(map) {
IdentifierTable &Ids = MigrateCtx.Pass.Ctx.Idents;
NSMakeCollectableII = &Ids.get("NSMakeCollectable");
CFMakeCollectableII = &Ids.get("CFMakeCollectable");
}
bool shouldWalkTypesOfTypeLocs() const { return false; }
bool VisitCallExpr(CallExpr *E) {
TransformActions &TA = MigrateCtx.Pass.TA;
if (MigrateCtx.isGCOwnedNonObjC(E->getType())) {
if (MigrateCtx.Pass.noNSAllocReallocError())
TA.reportWarning("call returns pointer to GC managed memory; "
"it will become unmanaged in ARC",
E->getLocStart(), E->getSourceRange());
else
TA.reportError("call returns pointer to GC managed memory; "
"it will become unmanaged in ARC",
E->getLocStart(), E->getSourceRange());
return true;
}
Expr *CEE = E->getCallee()->IgnoreParenImpCasts();
if (DeclRefExpr *DRE = dyn_cast<DeclRefExpr>(CEE)) {
if (FunctionDecl *FD = dyn_cast_or_null<FunctionDecl>(DRE->getDecl())) {
if (!FD->getDeclContext()->getRedeclContext()->isFileContext())
return true;
if (FD->getIdentifier() == NSMakeCollectableII) {
Transaction Trans(TA);
TA.clearDiagnostic(diag::err_unavailable,
diag::err_unavailable_message,
diag::err_ovl_deleted_call, // ObjC++
DRE->getSourceRange());
TA.replace(DRE->getSourceRange(), "CFBridgingRelease");
} else if (FD->getIdentifier() == CFMakeCollectableII) {
TA.reportError("CFMakeCollectable will leak the object that it "
"receives in ARC", DRE->getLocation(),
DRE->getSourceRange());
}
}
}
return true;
}
};
} // anonymous namespace
void GCCollectableCallsTraverser::traverseBody(BodyContext &BodyCtx) {
GCCollectableCallsChecker(BodyCtx.getMigrationContext(),
BodyCtx.getParentMap())
.TraverseStmt(BodyCtx.getTopStmt());
}
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