| /* |
| * Copyright 2010, The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "slang_rs_object_ref_count.h" |
| |
| #include <list> |
| |
| #include "clang/AST/DeclGroup.h" |
| #include "clang/AST/Expr.h" |
| #include "clang/AST/NestedNameSpecifier.h" |
| #include "clang/AST/OperationKinds.h" |
| #include "clang/AST/Stmt.h" |
| #include "clang/AST/StmtVisitor.h" |
| |
| #include "slang_assert.h" |
| #include "slang_rs.h" |
| #include "slang_rs_ast_replace.h" |
| #include "slang_rs_export_type.h" |
| |
| namespace slang { |
| |
| clang::FunctionDecl *RSObjectRefCount:: |
| RSSetObjectFD[RSExportPrimitiveType::LastRSObjectType - |
| RSExportPrimitiveType::FirstRSObjectType + 1]; |
| clang::FunctionDecl *RSObjectRefCount:: |
| RSClearObjectFD[RSExportPrimitiveType::LastRSObjectType - |
| RSExportPrimitiveType::FirstRSObjectType + 1]; |
| |
| void RSObjectRefCount::GetRSRefCountingFunctions(clang::ASTContext &C) { |
| for (unsigned i = 0; |
| i < (sizeof(RSClearObjectFD) / sizeof(clang::FunctionDecl*)); |
| i++) { |
| RSSetObjectFD[i] = NULL; |
| RSClearObjectFD[i] = NULL; |
| } |
| |
| clang::TranslationUnitDecl *TUDecl = C.getTranslationUnitDecl(); |
| |
| for (clang::DeclContext::decl_iterator I = TUDecl->decls_begin(), |
| E = TUDecl->decls_end(); I != E; I++) { |
| if ((I->getKind() >= clang::Decl::firstFunction) && |
| (I->getKind() <= clang::Decl::lastFunction)) { |
| clang::FunctionDecl *FD = static_cast<clang::FunctionDecl*>(*I); |
| |
| // points to RSSetObjectFD or RSClearObjectFD |
| clang::FunctionDecl **RSObjectFD; |
| |
| if (FD->getName() == "rsSetObject") { |
| slangAssert((FD->getNumParams() == 2) && |
| "Invalid rsSetObject function prototype (# params)"); |
| RSObjectFD = RSSetObjectFD; |
| } else if (FD->getName() == "rsClearObject") { |
| slangAssert((FD->getNumParams() == 1) && |
| "Invalid rsClearObject function prototype (# params)"); |
| RSObjectFD = RSClearObjectFD; |
| } else { |
| continue; |
| } |
| |
| const clang::ParmVarDecl *PVD = FD->getParamDecl(0); |
| clang::QualType PVT = PVD->getOriginalType(); |
| // The first parameter must be a pointer like rs_allocation* |
| slangAssert(PVT->isPointerType() && |
| "Invalid rs{Set,Clear}Object function prototype (pointer param)"); |
| |
| // The rs object type passed to the FD |
| clang::QualType RST = PVT->getPointeeType(); |
| RSExportPrimitiveType::DataType DT = |
| RSExportPrimitiveType::GetRSSpecificType(RST.getTypePtr()); |
| slangAssert(RSExportPrimitiveType::IsRSObjectType(DT) |
| && "must be RS object type"); |
| |
| RSObjectFD[(DT - RSExportPrimitiveType::FirstRSObjectType)] = FD; |
| } |
| } |
| } |
| |
| namespace { |
| |
| // This function constructs a new CompoundStmt from the input StmtList. |
| static clang::CompoundStmt* BuildCompoundStmt(clang::ASTContext &C, |
| std::list<clang::Stmt*> &StmtList, clang::SourceLocation Loc) { |
| unsigned NewStmtCount = StmtList.size(); |
| unsigned CompoundStmtCount = 0; |
| |
| clang::Stmt **CompoundStmtList; |
| CompoundStmtList = new clang::Stmt*[NewStmtCount]; |
| |
| std::list<clang::Stmt*>::const_iterator I = StmtList.begin(); |
| std::list<clang::Stmt*>::const_iterator E = StmtList.end(); |
| for ( ; I != E; I++) { |
| CompoundStmtList[CompoundStmtCount++] = *I; |
| } |
| slangAssert(CompoundStmtCount == NewStmtCount); |
| |
| clang::CompoundStmt *CS = new(C) clang::CompoundStmt(C, |
| CompoundStmtList, |
| CompoundStmtCount, |
| Loc, |
| Loc); |
| |
| delete [] CompoundStmtList; |
| |
| return CS; |
| } |
| |
| static void AppendAfterStmt(clang::ASTContext &C, |
| clang::CompoundStmt *CS, |
| clang::Stmt *S, |
| std::list<clang::Stmt*> &StmtList) { |
| slangAssert(CS); |
| clang::CompoundStmt::body_iterator bI = CS->body_begin(); |
| clang::CompoundStmt::body_iterator bE = CS->body_end(); |
| clang::Stmt **UpdatedStmtList = |
| new clang::Stmt*[CS->size() + StmtList.size()]; |
| |
| unsigned UpdatedStmtCount = 0; |
| unsigned Once = 0; |
| for ( ; bI != bE; bI++) { |
| if (!S && ((*bI)->getStmtClass() == clang::Stmt::ReturnStmtClass)) { |
| // If we come across a return here, we don't have anything we can |
| // reasonably replace. We should have already inserted our destructor |
| // code in the proper spot, so we just clean up and return. |
| delete [] UpdatedStmtList; |
| |
| return; |
| } |
| |
| UpdatedStmtList[UpdatedStmtCount++] = *bI; |
| |
| if ((*bI == S) && !Once) { |
| Once++; |
| std::list<clang::Stmt*>::const_iterator I = StmtList.begin(); |
| std::list<clang::Stmt*>::const_iterator E = StmtList.end(); |
| for ( ; I != E; I++) { |
| UpdatedStmtList[UpdatedStmtCount++] = *I; |
| } |
| } |
| } |
| slangAssert(Once <= 1); |
| |
| // When S is NULL, we are appending to the end of the CompoundStmt. |
| if (!S) { |
| slangAssert(Once == 0); |
| std::list<clang::Stmt*>::const_iterator I = StmtList.begin(); |
| std::list<clang::Stmt*>::const_iterator E = StmtList.end(); |
| for ( ; I != E; I++) { |
| UpdatedStmtList[UpdatedStmtCount++] = *I; |
| } |
| } |
| |
| CS->setStmts(C, UpdatedStmtList, UpdatedStmtCount); |
| |
| delete [] UpdatedStmtList; |
| |
| return; |
| } |
| |
| // This class visits a compound statement and inserts DtorStmt |
| // in proper locations. This includes inserting it before any |
| // return statement in any sub-block, at the end of the logical enclosing |
| // scope (compound statement), and/or before any break/continue statement that |
| // would resume outside the declared scope. We will not handle the case for |
| // goto statements that leave a local scope. |
| // |
| // To accomplish these goals, it collects a list of sub-Stmt's that |
| // correspond to scope exit points. It then uses an RSASTReplace visitor to |
| // transform the AST, inserting appropriate destructors before each of those |
| // sub-Stmt's (and also before the exit of the outermost containing Stmt for |
| // the scope). |
| class DestructorVisitor : public clang::StmtVisitor<DestructorVisitor> { |
| private: |
| clang::ASTContext &mCtx; |
| |
| // The loop depth of the currently visited node. |
| int mLoopDepth; |
| |
| // The switch statement depth of the currently visited node. |
| // Note that this is tracked separately from the loop depth because |
| // SwitchStmt-contained ContinueStmt's should have destructors for the |
| // corresponding loop scope. |
| int mSwitchDepth; |
| |
| // The outermost statement block that we are currently visiting. |
| // This should always be a CompoundStmt. |
| clang::Stmt *mOuterStmt; |
| |
| // The destructor to execute for this scope/variable. |
| clang::Stmt* mDtorStmt; |
| |
| // The stack of statements which should be replaced by a compound statement |
| // containing the new destructor call followed by the original Stmt. |
| std::stack<clang::Stmt*> mReplaceStmtStack; |
| |
| // The source location for the variable declaration that we are trying to |
| // insert destructors for. Note that InsertDestructors() will not generate |
| // destructor calls for source locations that occur lexically before this |
| // location. |
| clang::SourceLocation mVarLoc; |
| |
| public: |
| DestructorVisitor(clang::ASTContext &C, |
| clang::Stmt* OuterStmt, |
| clang::Stmt* DtorStmt, |
| clang::SourceLocation VarLoc); |
| |
| // This code walks the collected list of Stmts to replace and actually does |
| // the replacement. It also finishes up by appending the destructor to the |
| // current outermost CompoundStmt. |
| void InsertDestructors() { |
| clang::Stmt *S = NULL; |
| clang::SourceManager &SM = mCtx.getSourceManager(); |
| std::list<clang::Stmt *> StmtList; |
| StmtList.push_back(mDtorStmt); |
| |
| while (!mReplaceStmtStack.empty()) { |
| S = mReplaceStmtStack.top(); |
| mReplaceStmtStack.pop(); |
| |
| // Skip all source locations that occur before the variable's |
| // declaration, since it won't have been initialized yet. |
| if (SM.isBeforeInTranslationUnit(S->getLocStart(), mVarLoc)) { |
| continue; |
| } |
| |
| StmtList.push_back(S); |
| clang::CompoundStmt *CS = |
| BuildCompoundStmt(mCtx, StmtList, S->getLocEnd()); |
| StmtList.pop_back(); |
| |
| RSASTReplace R(mCtx); |
| R.ReplaceStmt(mOuterStmt, S, CS); |
| } |
| clang::CompoundStmt *CS = |
| llvm::dyn_cast<clang::CompoundStmt>(mOuterStmt); |
| slangAssert(CS); |
| AppendAfterStmt(mCtx, CS, NULL, StmtList); |
| } |
| |
| void VisitStmt(clang::Stmt *S); |
| void VisitCompoundStmt(clang::CompoundStmt *CS); |
| |
| void VisitBreakStmt(clang::BreakStmt *BS); |
| void VisitCaseStmt(clang::CaseStmt *CS); |
| void VisitContinueStmt(clang::ContinueStmt *CS); |
| void VisitDefaultStmt(clang::DefaultStmt *DS); |
| void VisitDoStmt(clang::DoStmt *DS); |
| void VisitForStmt(clang::ForStmt *FS); |
| void VisitIfStmt(clang::IfStmt *IS); |
| void VisitReturnStmt(clang::ReturnStmt *RS); |
| void VisitSwitchCase(clang::SwitchCase *SC); |
| void VisitSwitchStmt(clang::SwitchStmt *SS); |
| void VisitWhileStmt(clang::WhileStmt *WS); |
| }; |
| |
| DestructorVisitor::DestructorVisitor(clang::ASTContext &C, |
| clang::Stmt *OuterStmt, |
| clang::Stmt *DtorStmt, |
| clang::SourceLocation VarLoc) |
| : mCtx(C), |
| mLoopDepth(0), |
| mSwitchDepth(0), |
| mOuterStmt(OuterStmt), |
| mDtorStmt(DtorStmt), |
| mVarLoc(VarLoc) { |
| return; |
| } |
| |
| void DestructorVisitor::VisitStmt(clang::Stmt *S) { |
| for (clang::Stmt::child_iterator I = S->child_begin(), E = S->child_end(); |
| I != E; |
| I++) { |
| if (clang::Stmt *Child = *I) { |
| Visit(Child); |
| } |
| } |
| return; |
| } |
| |
| void DestructorVisitor::VisitCompoundStmt(clang::CompoundStmt *CS) { |
| VisitStmt(CS); |
| return; |
| } |
| |
| void DestructorVisitor::VisitBreakStmt(clang::BreakStmt *BS) { |
| VisitStmt(BS); |
| if ((mLoopDepth == 0) && (mSwitchDepth == 0)) { |
| mReplaceStmtStack.push(BS); |
| } |
| return; |
| } |
| |
| void DestructorVisitor::VisitCaseStmt(clang::CaseStmt *CS) { |
| VisitStmt(CS); |
| return; |
| } |
| |
| void DestructorVisitor::VisitContinueStmt(clang::ContinueStmt *CS) { |
| VisitStmt(CS); |
| if (mLoopDepth == 0) { |
| // Switch statements can have nested continues. |
| mReplaceStmtStack.push(CS); |
| } |
| return; |
| } |
| |
| void DestructorVisitor::VisitDefaultStmt(clang::DefaultStmt *DS) { |
| VisitStmt(DS); |
| return; |
| } |
| |
| void DestructorVisitor::VisitDoStmt(clang::DoStmt *DS) { |
| mLoopDepth++; |
| VisitStmt(DS); |
| mLoopDepth--; |
| return; |
| } |
| |
| void DestructorVisitor::VisitForStmt(clang::ForStmt *FS) { |
| mLoopDepth++; |
| VisitStmt(FS); |
| mLoopDepth--; |
| return; |
| } |
| |
| void DestructorVisitor::VisitIfStmt(clang::IfStmt *IS) { |
| VisitStmt(IS); |
| return; |
| } |
| |
| void DestructorVisitor::VisitReturnStmt(clang::ReturnStmt *RS) { |
| mReplaceStmtStack.push(RS); |
| return; |
| } |
| |
| void DestructorVisitor::VisitSwitchCase(clang::SwitchCase *SC) { |
| slangAssert(false && "Both case and default have specialized handlers"); |
| VisitStmt(SC); |
| return; |
| } |
| |
| void DestructorVisitor::VisitSwitchStmt(clang::SwitchStmt *SS) { |
| mSwitchDepth++; |
| VisitStmt(SS); |
| mSwitchDepth--; |
| return; |
| } |
| |
| void DestructorVisitor::VisitWhileStmt(clang::WhileStmt *WS) { |
| mLoopDepth++; |
| VisitStmt(WS); |
| mLoopDepth--; |
| return; |
| } |
| |
| clang::Expr *ClearSingleRSObject(clang::ASTContext &C, |
| clang::Expr *RefRSVar, |
| clang::SourceLocation Loc) { |
| slangAssert(RefRSVar); |
| const clang::Type *T = RefRSVar->getType().getTypePtr(); |
| slangAssert(!T->isArrayType() && |
| "Should not be destroying arrays with this function"); |
| |
| clang::FunctionDecl *ClearObjectFD = RSObjectRefCount::GetRSClearObjectFD(T); |
| slangAssert((ClearObjectFD != NULL) && |
| "rsClearObject doesn't cover all RS object types"); |
| |
| clang::QualType ClearObjectFDType = ClearObjectFD->getType(); |
| clang::QualType ClearObjectFDArgType = |
| ClearObjectFD->getParamDecl(0)->getOriginalType(); |
| |
| // Example destructor for "rs_font localFont;" |
| // |
| // (CallExpr 'void' |
| // (ImplicitCastExpr 'void (*)(rs_font *)' <FunctionToPointerDecay> |
| // (DeclRefExpr 'void (rs_font *)' FunctionDecl='rsClearObject')) |
| // (UnaryOperator 'rs_font *' prefix '&' |
| // (DeclRefExpr 'rs_font':'rs_font' Var='localFont'))) |
| |
| // Get address of targeted RS object |
| clang::Expr *AddrRefRSVar = |
| new(C) clang::UnaryOperator(RefRSVar, |
| clang::UO_AddrOf, |
| ClearObjectFDArgType, |
| clang::VK_RValue, |
| clang::OK_Ordinary, |
| Loc); |
| |
| clang::Expr *RefRSClearObjectFD = |
| clang::DeclRefExpr::Create(C, |
| clang::NestedNameSpecifierLoc(), |
| clang::SourceLocation(), |
| ClearObjectFD, |
| false, |
| ClearObjectFD->getLocation(), |
| ClearObjectFDType, |
| clang::VK_RValue, |
| NULL); |
| |
| clang::Expr *RSClearObjectFP = |
| clang::ImplicitCastExpr::Create(C, |
| C.getPointerType(ClearObjectFDType), |
| clang::CK_FunctionToPointerDecay, |
| RefRSClearObjectFD, |
| NULL, |
| clang::VK_RValue); |
| |
| llvm::SmallVector<clang::Expr*, 1> ArgList; |
| ArgList.push_back(AddrRefRSVar); |
| |
| clang::CallExpr *RSClearObjectCall = |
| new(C) clang::CallExpr(C, |
| RSClearObjectFP, |
| ArgList, |
| ClearObjectFD->getCallResultType(), |
| clang::VK_RValue, |
| Loc); |
| |
| return RSClearObjectCall; |
| } |
| |
| static int ArrayDim(const clang::Type *T) { |
| if (!T || !T->isArrayType()) { |
| return 0; |
| } |
| |
| const clang::ConstantArrayType *CAT = |
| static_cast<const clang::ConstantArrayType *>(T); |
| return static_cast<int>(CAT->getSize().getSExtValue()); |
| } |
| |
| static clang::Stmt *ClearStructRSObject( |
| clang::ASTContext &C, |
| clang::DeclContext *DC, |
| clang::Expr *RefRSStruct, |
| clang::SourceLocation StartLoc, |
| clang::SourceLocation Loc); |
| |
| static clang::Stmt *ClearArrayRSObject( |
| clang::ASTContext &C, |
| clang::DeclContext *DC, |
| clang::Expr *RefRSArr, |
| clang::SourceLocation StartLoc, |
| clang::SourceLocation Loc) { |
| const clang::Type *BaseType = RefRSArr->getType().getTypePtr(); |
| slangAssert(BaseType->isArrayType()); |
| |
| int NumArrayElements = ArrayDim(BaseType); |
| // Actually extract out the base RS object type for use later |
| BaseType = BaseType->getArrayElementTypeNoTypeQual(); |
| |
| clang::Stmt *StmtArray[2] = {NULL}; |
| int StmtCtr = 0; |
| |
| if (NumArrayElements <= 0) { |
| return NULL; |
| } |
| |
| // Example destructor loop for "rs_font fontArr[10];" |
| // |
| // (CompoundStmt |
| // (DeclStmt "int rsIntIter") |
| // (ForStmt |
| // (BinaryOperator 'int' '=' |
| // (DeclRefExpr 'int' Var='rsIntIter') |
| // (IntegerLiteral 'int' 0)) |
| // (BinaryOperator 'int' '<' |
| // (DeclRefExpr 'int' Var='rsIntIter') |
| // (IntegerLiteral 'int' 10) |
| // NULL << CondVar >> |
| // (UnaryOperator 'int' postfix '++' |
| // (DeclRefExpr 'int' Var='rsIntIter')) |
| // (CallExpr 'void' |
| // (ImplicitCastExpr 'void (*)(rs_font *)' <FunctionToPointerDecay> |
| // (DeclRefExpr 'void (rs_font *)' FunctionDecl='rsClearObject')) |
| // (UnaryOperator 'rs_font *' prefix '&' |
| // (ArraySubscriptExpr 'rs_font':'rs_font' |
| // (ImplicitCastExpr 'rs_font *' <ArrayToPointerDecay> |
| // (DeclRefExpr 'rs_font [10]' Var='fontArr')) |
| // (DeclRefExpr 'int' Var='rsIntIter'))))))) |
| |
| // Create helper variable for iterating through elements |
| clang::IdentifierInfo& II = C.Idents.get("rsIntIter"); |
| clang::VarDecl *IIVD = |
| clang::VarDecl::Create(C, |
| DC, |
| StartLoc, |
| Loc, |
| &II, |
| C.IntTy, |
| C.getTrivialTypeSourceInfo(C.IntTy), |
| clang::SC_None, |
| clang::SC_None); |
| clang::Decl *IID = (clang::Decl *)IIVD; |
| |
| clang::DeclGroupRef DGR = clang::DeclGroupRef::Create(C, &IID, 1); |
| StmtArray[StmtCtr++] = new(C) clang::DeclStmt(DGR, Loc, Loc); |
| |
| // Form the actual destructor loop |
| // for (Init; Cond; Inc) |
| // RSClearObjectCall; |
| |
| // Init -> "rsIntIter = 0" |
| clang::DeclRefExpr *RefrsIntIter = |
| clang::DeclRefExpr::Create(C, |
| clang::NestedNameSpecifierLoc(), |
| clang::SourceLocation(), |
| IIVD, |
| false, |
| Loc, |
| C.IntTy, |
| clang::VK_RValue, |
| NULL); |
| |
| clang::Expr *Int0 = clang::IntegerLiteral::Create(C, |
| llvm::APInt(C.getTypeSize(C.IntTy), 0), C.IntTy, Loc); |
| |
| clang::BinaryOperator *Init = |
| new(C) clang::BinaryOperator(RefrsIntIter, |
| Int0, |
| clang::BO_Assign, |
| C.IntTy, |
| clang::VK_RValue, |
| clang::OK_Ordinary, |
| Loc); |
| |
| // Cond -> "rsIntIter < NumArrayElements" |
| clang::Expr *NumArrayElementsExpr = clang::IntegerLiteral::Create(C, |
| llvm::APInt(C.getTypeSize(C.IntTy), NumArrayElements), C.IntTy, Loc); |
| |
| clang::BinaryOperator *Cond = |
| new(C) clang::BinaryOperator(RefrsIntIter, |
| NumArrayElementsExpr, |
| clang::BO_LT, |
| C.IntTy, |
| clang::VK_RValue, |
| clang::OK_Ordinary, |
| Loc); |
| |
| // Inc -> "rsIntIter++" |
| clang::UnaryOperator *Inc = |
| new(C) clang::UnaryOperator(RefrsIntIter, |
| clang::UO_PostInc, |
| C.IntTy, |
| clang::VK_RValue, |
| clang::OK_Ordinary, |
| Loc); |
| |
| // Body -> "rsClearObject(&VD[rsIntIter]);" |
| // Destructor loop operates on individual array elements |
| |
| clang::Expr *RefRSArrPtr = |
| clang::ImplicitCastExpr::Create(C, |
| C.getPointerType(BaseType->getCanonicalTypeInternal()), |
| clang::CK_ArrayToPointerDecay, |
| RefRSArr, |
| NULL, |
| clang::VK_RValue); |
| |
| clang::Expr *RefRSArrPtrSubscript = |
| new(C) clang::ArraySubscriptExpr(RefRSArrPtr, |
| RefrsIntIter, |
| BaseType->getCanonicalTypeInternal(), |
| clang::VK_RValue, |
| clang::OK_Ordinary, |
| Loc); |
| |
| RSExportPrimitiveType::DataType DT = |
| RSExportPrimitiveType::GetRSSpecificType(BaseType); |
| |
| clang::Stmt *RSClearObjectCall = NULL; |
| if (BaseType->isArrayType()) { |
| RSClearObjectCall = |
| ClearArrayRSObject(C, DC, RefRSArrPtrSubscript, StartLoc, Loc); |
| } else if (DT == RSExportPrimitiveType::DataTypeUnknown) { |
| RSClearObjectCall = |
| ClearStructRSObject(C, DC, RefRSArrPtrSubscript, StartLoc, Loc); |
| } else { |
| RSClearObjectCall = ClearSingleRSObject(C, RefRSArrPtrSubscript, Loc); |
| } |
| |
| clang::ForStmt *DestructorLoop = |
| new(C) clang::ForStmt(C, |
| Init, |
| Cond, |
| NULL, // no condVar |
| Inc, |
| RSClearObjectCall, |
| Loc, |
| Loc, |
| Loc); |
| |
| StmtArray[StmtCtr++] = DestructorLoop; |
| slangAssert(StmtCtr == 2); |
| |
| clang::CompoundStmt *CS = |
| new(C) clang::CompoundStmt(C, StmtArray, StmtCtr, Loc, Loc); |
| |
| return CS; |
| } |
| |
| static unsigned CountRSObjectTypes(clang::ASTContext &C, |
| const clang::Type *T, |
| clang::SourceLocation Loc) { |
| slangAssert(T); |
| unsigned RSObjectCount = 0; |
| |
| if (T->isArrayType()) { |
| return CountRSObjectTypes(C, T->getArrayElementTypeNoTypeQual(), Loc); |
| } |
| |
| RSExportPrimitiveType::DataType DT = |
| RSExportPrimitiveType::GetRSSpecificType(T); |
| if (DT != RSExportPrimitiveType::DataTypeUnknown) { |
| return (RSExportPrimitiveType::IsRSObjectType(DT) ? 1 : 0); |
| } |
| |
| if (T->isUnionType()) { |
| clang::RecordDecl *RD = T->getAsUnionType()->getDecl(); |
| RD = RD->getDefinition(); |
| for (clang::RecordDecl::field_iterator FI = RD->field_begin(), |
| FE = RD->field_end(); |
| FI != FE; |
| FI++) { |
| const clang::FieldDecl *FD = *FI; |
| const clang::Type *FT = RSExportType::GetTypeOfDecl(FD); |
| if (CountRSObjectTypes(C, FT, Loc)) { |
| slangAssert(false && "can't have unions with RS object types!"); |
| return 0; |
| } |
| } |
| } |
| |
| if (!T->isStructureType()) { |
| return 0; |
| } |
| |
| clang::RecordDecl *RD = T->getAsStructureType()->getDecl(); |
| RD = RD->getDefinition(); |
| for (clang::RecordDecl::field_iterator FI = RD->field_begin(), |
| FE = RD->field_end(); |
| FI != FE; |
| FI++) { |
| const clang::FieldDecl *FD = *FI; |
| const clang::Type *FT = RSExportType::GetTypeOfDecl(FD); |
| if (CountRSObjectTypes(C, FT, Loc)) { |
| // Sub-structs should only count once (as should arrays, etc.) |
| RSObjectCount++; |
| } |
| } |
| |
| return RSObjectCount; |
| } |
| |
| static clang::Stmt *ClearStructRSObject( |
| clang::ASTContext &C, |
| clang::DeclContext *DC, |
| clang::Expr *RefRSStruct, |
| clang::SourceLocation StartLoc, |
| clang::SourceLocation Loc) { |
| const clang::Type *BaseType = RefRSStruct->getType().getTypePtr(); |
| |
| slangAssert(!BaseType->isArrayType()); |
| |
| // Structs should show up as unknown primitive types |
| slangAssert(RSExportPrimitiveType::GetRSSpecificType(BaseType) == |
| RSExportPrimitiveType::DataTypeUnknown); |
| |
| unsigned FieldsToDestroy = CountRSObjectTypes(C, BaseType, Loc); |
| |
| unsigned StmtCount = 0; |
| clang::Stmt **StmtArray = new clang::Stmt*[FieldsToDestroy]; |
| for (unsigned i = 0; i < FieldsToDestroy; i++) { |
| StmtArray[i] = NULL; |
| } |
| |
| // Populate StmtArray by creating a destructor for each RS object field |
| clang::RecordDecl *RD = BaseType->getAsStructureType()->getDecl(); |
| RD = RD->getDefinition(); |
| for (clang::RecordDecl::field_iterator FI = RD->field_begin(), |
| FE = RD->field_end(); |
| FI != FE; |
| FI++) { |
| // We just look through all field declarations to see if we find a |
| // declaration for an RS object type (or an array of one). |
| bool IsArrayType = false; |
| clang::FieldDecl *FD = *FI; |
| const clang::Type *FT = RSExportType::GetTypeOfDecl(FD); |
| const clang::Type *OrigType = FT; |
| while (FT && FT->isArrayType()) { |
| FT = FT->getArrayElementTypeNoTypeQual(); |
| IsArrayType = true; |
| } |
| |
| if (RSExportPrimitiveType::IsRSObjectType(FT)) { |
| clang::DeclAccessPair FoundDecl = |
| clang::DeclAccessPair::make(FD, clang::AS_none); |
| clang::MemberExpr *RSObjectMember = |
| clang::MemberExpr::Create(C, |
| RefRSStruct, |
| false, |
| clang::NestedNameSpecifierLoc(), |
| clang::SourceLocation(), |
| FD, |
| FoundDecl, |
| clang::DeclarationNameInfo(), |
| NULL, |
| OrigType->getCanonicalTypeInternal(), |
| clang::VK_RValue, |
| clang::OK_Ordinary); |
| |
| slangAssert(StmtCount < FieldsToDestroy); |
| |
| if (IsArrayType) { |
| StmtArray[StmtCount++] = ClearArrayRSObject(C, |
| DC, |
| RSObjectMember, |
| StartLoc, |
| Loc); |
| } else { |
| StmtArray[StmtCount++] = ClearSingleRSObject(C, |
| RSObjectMember, |
| Loc); |
| } |
| } else if (FT->isStructureType() && CountRSObjectTypes(C, FT, Loc)) { |
| // In this case, we have a nested struct. We may not end up filling all |
| // of the spaces in StmtArray (sub-structs should handle themselves |
| // with separate compound statements). |
| clang::DeclAccessPair FoundDecl = |
| clang::DeclAccessPair::make(FD, clang::AS_none); |
| clang::MemberExpr *RSObjectMember = |
| clang::MemberExpr::Create(C, |
| RefRSStruct, |
| false, |
| clang::NestedNameSpecifierLoc(), |
| clang::SourceLocation(), |
| FD, |
| FoundDecl, |
| clang::DeclarationNameInfo(), |
| NULL, |
| OrigType->getCanonicalTypeInternal(), |
| clang::VK_RValue, |
| clang::OK_Ordinary); |
| |
| if (IsArrayType) { |
| StmtArray[StmtCount++] = ClearArrayRSObject(C, |
| DC, |
| RSObjectMember, |
| StartLoc, |
| Loc); |
| } else { |
| StmtArray[StmtCount++] = ClearStructRSObject(C, |
| DC, |
| RSObjectMember, |
| StartLoc, |
| Loc); |
| } |
| } |
| } |
| |
| slangAssert(StmtCount > 0); |
| clang::CompoundStmt *CS = |
| new(C) clang::CompoundStmt(C, StmtArray, StmtCount, Loc, Loc); |
| |
| delete [] StmtArray; |
| |
| return CS; |
| } |
| |
| static clang::Stmt *CreateSingleRSSetObject(clang::ASTContext &C, |
| clang::Expr *DstExpr, |
| clang::Expr *SrcExpr, |
| clang::SourceLocation StartLoc, |
| clang::SourceLocation Loc) { |
| const clang::Type *T = DstExpr->getType().getTypePtr(); |
| clang::FunctionDecl *SetObjectFD = RSObjectRefCount::GetRSSetObjectFD(T); |
| slangAssert((SetObjectFD != NULL) && |
| "rsSetObject doesn't cover all RS object types"); |
| |
| clang::QualType SetObjectFDType = SetObjectFD->getType(); |
| clang::QualType SetObjectFDArgType[2]; |
| SetObjectFDArgType[0] = SetObjectFD->getParamDecl(0)->getOriginalType(); |
| SetObjectFDArgType[1] = SetObjectFD->getParamDecl(1)->getOriginalType(); |
| |
| clang::Expr *RefRSSetObjectFD = |
| clang::DeclRefExpr::Create(C, |
| clang::NestedNameSpecifierLoc(), |
| clang::SourceLocation(), |
| SetObjectFD, |
| false, |
| Loc, |
| SetObjectFDType, |
| clang::VK_RValue, |
| NULL); |
| |
| clang::Expr *RSSetObjectFP = |
| clang::ImplicitCastExpr::Create(C, |
| C.getPointerType(SetObjectFDType), |
| clang::CK_FunctionToPointerDecay, |
| RefRSSetObjectFD, |
| NULL, |
| clang::VK_RValue); |
| |
| llvm::SmallVector<clang::Expr*, 2> ArgList; |
| ArgList.push_back(new(C) clang::UnaryOperator(DstExpr, |
| clang::UO_AddrOf, |
| SetObjectFDArgType[0], |
| clang::VK_RValue, |
| clang::OK_Ordinary, |
| Loc)); |
| ArgList.push_back(SrcExpr); |
| |
| clang::CallExpr *RSSetObjectCall = |
| new(C) clang::CallExpr(C, |
| RSSetObjectFP, |
| ArgList, |
| SetObjectFD->getCallResultType(), |
| clang::VK_RValue, |
| Loc); |
| |
| return RSSetObjectCall; |
| } |
| |
| static clang::Stmt *CreateStructRSSetObject(clang::ASTContext &C, |
| clang::Expr *LHS, |
| clang::Expr *RHS, |
| clang::SourceLocation StartLoc, |
| clang::SourceLocation Loc); |
| |
| /*static clang::Stmt *CreateArrayRSSetObject(clang::ASTContext &C, |
| clang::Expr *DstArr, |
| clang::Expr *SrcArr, |
| clang::SourceLocation StartLoc, |
| clang::SourceLocation Loc) { |
| clang::DeclContext *DC = NULL; |
| const clang::Type *BaseType = DstArr->getType().getTypePtr(); |
| slangAssert(BaseType->isArrayType()); |
| |
| int NumArrayElements = ArrayDim(BaseType); |
| // Actually extract out the base RS object type for use later |
| BaseType = BaseType->getArrayElementTypeNoTypeQual(); |
| |
| clang::Stmt *StmtArray[2] = {NULL}; |
| int StmtCtr = 0; |
| |
| if (NumArrayElements <= 0) { |
| return NULL; |
| } |
| |
| // Create helper variable for iterating through elements |
| clang::IdentifierInfo& II = C.Idents.get("rsIntIter"); |
| clang::VarDecl *IIVD = |
| clang::VarDecl::Create(C, |
| DC, |
| StartLoc, |
| Loc, |
| &II, |
| C.IntTy, |
| C.getTrivialTypeSourceInfo(C.IntTy), |
| clang::SC_None, |
| clang::SC_None); |
| clang::Decl *IID = (clang::Decl *)IIVD; |
| |
| clang::DeclGroupRef DGR = clang::DeclGroupRef::Create(C, &IID, 1); |
| StmtArray[StmtCtr++] = new(C) clang::DeclStmt(DGR, Loc, Loc); |
| |
| // Form the actual loop |
| // for (Init; Cond; Inc) |
| // RSSetObjectCall; |
| |
| // Init -> "rsIntIter = 0" |
| clang::DeclRefExpr *RefrsIntIter = |
| clang::DeclRefExpr::Create(C, |
| clang::NestedNameSpecifierLoc(), |
| IIVD, |
| Loc, |
| C.IntTy, |
| clang::VK_RValue, |
| NULL); |
| |
| clang::Expr *Int0 = clang::IntegerLiteral::Create(C, |
| llvm::APInt(C.getTypeSize(C.IntTy), 0), C.IntTy, Loc); |
| |
| clang::BinaryOperator *Init = |
| new(C) clang::BinaryOperator(RefrsIntIter, |
| Int0, |
| clang::BO_Assign, |
| C.IntTy, |
| clang::VK_RValue, |
| clang::OK_Ordinary, |
| Loc); |
| |
| // Cond -> "rsIntIter < NumArrayElements" |
| clang::Expr *NumArrayElementsExpr = clang::IntegerLiteral::Create(C, |
| llvm::APInt(C.getTypeSize(C.IntTy), NumArrayElements), C.IntTy, Loc); |
| |
| clang::BinaryOperator *Cond = |
| new(C) clang::BinaryOperator(RefrsIntIter, |
| NumArrayElementsExpr, |
| clang::BO_LT, |
| C.IntTy, |
| clang::VK_RValue, |
| clang::OK_Ordinary, |
| Loc); |
| |
| // Inc -> "rsIntIter++" |
| clang::UnaryOperator *Inc = |
| new(C) clang::UnaryOperator(RefrsIntIter, |
| clang::UO_PostInc, |
| C.IntTy, |
| clang::VK_RValue, |
| clang::OK_Ordinary, |
| Loc); |
| |
| // Body -> "rsSetObject(&Dst[rsIntIter], Src[rsIntIter]);" |
| // Loop operates on individual array elements |
| |
| clang::Expr *DstArrPtr = |
| clang::ImplicitCastExpr::Create(C, |
| C.getPointerType(BaseType->getCanonicalTypeInternal()), |
| clang::CK_ArrayToPointerDecay, |
| DstArr, |
| NULL, |
| clang::VK_RValue); |
| |
| clang::Expr *DstArrPtrSubscript = |
| new(C) clang::ArraySubscriptExpr(DstArrPtr, |
| RefrsIntIter, |
| BaseType->getCanonicalTypeInternal(), |
| clang::VK_RValue, |
| clang::OK_Ordinary, |
| Loc); |
| |
| clang::Expr *SrcArrPtr = |
| clang::ImplicitCastExpr::Create(C, |
| C.getPointerType(BaseType->getCanonicalTypeInternal()), |
| clang::CK_ArrayToPointerDecay, |
| SrcArr, |
| NULL, |
| clang::VK_RValue); |
| |
| clang::Expr *SrcArrPtrSubscript = |
| new(C) clang::ArraySubscriptExpr(SrcArrPtr, |
| RefrsIntIter, |
| BaseType->getCanonicalTypeInternal(), |
| clang::VK_RValue, |
| clang::OK_Ordinary, |
| Loc); |
| |
| RSExportPrimitiveType::DataType DT = |
| RSExportPrimitiveType::GetRSSpecificType(BaseType); |
| |
| clang::Stmt *RSSetObjectCall = NULL; |
| if (BaseType->isArrayType()) { |
| RSSetObjectCall = CreateArrayRSSetObject(C, DstArrPtrSubscript, |
| SrcArrPtrSubscript, |
| StartLoc, Loc); |
| } else if (DT == RSExportPrimitiveType::DataTypeUnknown) { |
| RSSetObjectCall = CreateStructRSSetObject(C, DstArrPtrSubscript, |
| SrcArrPtrSubscript, |
| StartLoc, Loc); |
| } else { |
| RSSetObjectCall = CreateSingleRSSetObject(C, DstArrPtrSubscript, |
| SrcArrPtrSubscript, |
| StartLoc, Loc); |
| } |
| |
| clang::ForStmt *DestructorLoop = |
| new(C) clang::ForStmt(C, |
| Init, |
| Cond, |
| NULL, // no condVar |
| Inc, |
| RSSetObjectCall, |
| Loc, |
| Loc, |
| Loc); |
| |
| StmtArray[StmtCtr++] = DestructorLoop; |
| slangAssert(StmtCtr == 2); |
| |
| clang::CompoundStmt *CS = |
| new(C) clang::CompoundStmt(C, StmtArray, StmtCtr, Loc, Loc); |
| |
| return CS; |
| } */ |
| |
| static clang::Stmt *CreateStructRSSetObject(clang::ASTContext &C, |
| clang::Expr *LHS, |
| clang::Expr *RHS, |
| clang::SourceLocation StartLoc, |
| clang::SourceLocation Loc) { |
| clang::QualType QT = LHS->getType(); |
| const clang::Type *T = QT.getTypePtr(); |
| slangAssert(T->isStructureType()); |
| slangAssert(!RSExportPrimitiveType::IsRSObjectType(T)); |
| |
| // Keep an extra slot for the original copy (memcpy) |
| unsigned FieldsToSet = CountRSObjectTypes(C, T, Loc) + 1; |
| |
| unsigned StmtCount = 0; |
| clang::Stmt **StmtArray = new clang::Stmt*[FieldsToSet]; |
| for (unsigned i = 0; i < FieldsToSet; i++) { |
| StmtArray[i] = NULL; |
| } |
| |
| clang::RecordDecl *RD = T->getAsStructureType()->getDecl(); |
| RD = RD->getDefinition(); |
| for (clang::RecordDecl::field_iterator FI = RD->field_begin(), |
| FE = RD->field_end(); |
| FI != FE; |
| FI++) { |
| bool IsArrayType = false; |
| clang::FieldDecl *FD = *FI; |
| const clang::Type *FT = RSExportType::GetTypeOfDecl(FD); |
| const clang::Type *OrigType = FT; |
| |
| if (!CountRSObjectTypes(C, FT, Loc)) { |
| // Skip to next if we don't have any viable RS object types |
| continue; |
| } |
| |
| clang::DeclAccessPair FoundDecl = |
| clang::DeclAccessPair::make(FD, clang::AS_none); |
| clang::MemberExpr *DstMember = |
| clang::MemberExpr::Create(C, |
| LHS, |
| false, |
| clang::NestedNameSpecifierLoc(), |
| clang::SourceLocation(), |
| FD, |
| FoundDecl, |
| clang::DeclarationNameInfo(), |
| NULL, |
| OrigType->getCanonicalTypeInternal(), |
| clang::VK_RValue, |
| clang::OK_Ordinary); |
| |
| clang::MemberExpr *SrcMember = |
| clang::MemberExpr::Create(C, |
| RHS, |
| false, |
| clang::NestedNameSpecifierLoc(), |
| clang::SourceLocation(), |
| FD, |
| FoundDecl, |
| clang::DeclarationNameInfo(), |
| NULL, |
| OrigType->getCanonicalTypeInternal(), |
| clang::VK_RValue, |
| clang::OK_Ordinary); |
| |
| if (FT->isArrayType()) { |
| FT = FT->getArrayElementTypeNoTypeQual(); |
| IsArrayType = true; |
| } |
| |
| RSExportPrimitiveType::DataType DT = |
| RSExportPrimitiveType::GetRSSpecificType(FT); |
| |
| if (IsArrayType) { |
| clang::DiagnosticsEngine &DiagEngine = C.getDiagnostics(); |
| DiagEngine.Report( |
| clang::FullSourceLoc(Loc, C.getSourceManager()), |
| DiagEngine.getCustomDiagID( |
| clang::DiagnosticsEngine::Error, |
| "Arrays of RS object types within structures cannot be copied")); |
| // TODO(srhines): Support setting arrays of RS objects |
| // StmtArray[StmtCount++] = |
| // CreateArrayRSSetObject(C, DstMember, SrcMember, StartLoc, Loc); |
| } else if (DT == RSExportPrimitiveType::DataTypeUnknown) { |
| StmtArray[StmtCount++] = |
| CreateStructRSSetObject(C, DstMember, SrcMember, StartLoc, Loc); |
| } else if (RSExportPrimitiveType::IsRSObjectType(DT)) { |
| StmtArray[StmtCount++] = |
| CreateSingleRSSetObject(C, DstMember, SrcMember, StartLoc, Loc); |
| } else { |
| slangAssert(false); |
| } |
| } |
| |
| slangAssert(StmtCount > 0 && StmtCount < FieldsToSet); |
| |
| // We still need to actually do the overall struct copy. For simplicity, |
| // we just do a straight-up assignment (which will still preserve all |
| // the proper RS object reference counts). |
| clang::BinaryOperator *CopyStruct = |
| new(C) clang::BinaryOperator(LHS, RHS, clang::BO_Assign, QT, |
| clang::VK_RValue, clang::OK_Ordinary, Loc); |
| StmtArray[StmtCount++] = CopyStruct; |
| |
| clang::CompoundStmt *CS = |
| new(C) clang::CompoundStmt(C, StmtArray, StmtCount, Loc, Loc); |
| |
| delete [] StmtArray; |
| |
| return CS; |
| } |
| |
| } // namespace |
| |
| void RSObjectRefCount::Scope::ReplaceRSObjectAssignment( |
| clang::BinaryOperator *AS) { |
| |
| clang::QualType QT = AS->getType(); |
| |
| clang::ASTContext &C = RSObjectRefCount::GetRSSetObjectFD( |
| RSExportPrimitiveType::DataTypeRSFont)->getASTContext(); |
| |
| clang::SourceLocation Loc = AS->getExprLoc(); |
| clang::SourceLocation StartLoc = AS->getLHS()->getExprLoc(); |
| clang::Stmt *UpdatedStmt = NULL; |
| |
| if (!RSExportPrimitiveType::IsRSObjectType(QT.getTypePtr())) { |
| // By definition, this is a struct assignment if we get here |
| UpdatedStmt = |
| CreateStructRSSetObject(C, AS->getLHS(), AS->getRHS(), StartLoc, Loc); |
| } else { |
| UpdatedStmt = |
| CreateSingleRSSetObject(C, AS->getLHS(), AS->getRHS(), StartLoc, Loc); |
| } |
| |
| RSASTReplace R(C); |
| R.ReplaceStmt(mCS, AS, UpdatedStmt); |
| return; |
| } |
| |
| void RSObjectRefCount::Scope::AppendRSObjectInit( |
| clang::VarDecl *VD, |
| clang::DeclStmt *DS, |
| RSExportPrimitiveType::DataType DT, |
| clang::Expr *InitExpr) { |
| slangAssert(VD); |
| |
| if (!InitExpr) { |
| return; |
| } |
| |
| clang::ASTContext &C = RSObjectRefCount::GetRSSetObjectFD( |
| RSExportPrimitiveType::DataTypeRSFont)->getASTContext(); |
| clang::SourceLocation Loc = RSObjectRefCount::GetRSSetObjectFD( |
| RSExportPrimitiveType::DataTypeRSFont)->getLocation(); |
| clang::SourceLocation StartLoc = RSObjectRefCount::GetRSSetObjectFD( |
| RSExportPrimitiveType::DataTypeRSFont)->getInnerLocStart(); |
| |
| if (DT == RSExportPrimitiveType::DataTypeIsStruct) { |
| const clang::Type *T = RSExportType::GetTypeOfDecl(VD); |
| clang::DeclRefExpr *RefRSVar = |
| clang::DeclRefExpr::Create(C, |
| clang::NestedNameSpecifierLoc(), |
| clang::SourceLocation(), |
| VD, |
| false, |
| Loc, |
| T->getCanonicalTypeInternal(), |
| clang::VK_RValue, |
| NULL); |
| |
| clang::Stmt *RSSetObjectOps = |
| CreateStructRSSetObject(C, RefRSVar, InitExpr, StartLoc, Loc); |
| |
| std::list<clang::Stmt*> StmtList; |
| StmtList.push_back(RSSetObjectOps); |
| AppendAfterStmt(C, mCS, DS, StmtList); |
| return; |
| } |
| |
| clang::FunctionDecl *SetObjectFD = RSObjectRefCount::GetRSSetObjectFD(DT); |
| slangAssert((SetObjectFD != NULL) && |
| "rsSetObject doesn't cover all RS object types"); |
| |
| clang::QualType SetObjectFDType = SetObjectFD->getType(); |
| clang::QualType SetObjectFDArgType[2]; |
| SetObjectFDArgType[0] = SetObjectFD->getParamDecl(0)->getOriginalType(); |
| SetObjectFDArgType[1] = SetObjectFD->getParamDecl(1)->getOriginalType(); |
| |
| clang::Expr *RefRSSetObjectFD = |
| clang::DeclRefExpr::Create(C, |
| clang::NestedNameSpecifierLoc(), |
| clang::SourceLocation(), |
| SetObjectFD, |
| false, |
| Loc, |
| SetObjectFDType, |
| clang::VK_RValue, |
| NULL); |
| |
| clang::Expr *RSSetObjectFP = |
| clang::ImplicitCastExpr::Create(C, |
| C.getPointerType(SetObjectFDType), |
| clang::CK_FunctionToPointerDecay, |
| RefRSSetObjectFD, |
| NULL, |
| clang::VK_RValue); |
| |
| const clang::Type *T = RSExportType::GetTypeOfDecl(VD); |
| clang::DeclRefExpr *RefRSVar = |
| clang::DeclRefExpr::Create(C, |
| clang::NestedNameSpecifierLoc(), |
| clang::SourceLocation(), |
| VD, |
| false, |
| Loc, |
| T->getCanonicalTypeInternal(), |
| clang::VK_RValue, |
| NULL); |
| |
| llvm::SmallVector<clang::Expr*, 2> ArgList; |
| ArgList.push_back(new(C) clang::UnaryOperator(RefRSVar, |
| clang::UO_AddrOf, |
| SetObjectFDArgType[0], |
| clang::VK_RValue, |
| clang::OK_Ordinary, |
| Loc)); |
| ArgList.push_back(InitExpr); |
| |
| clang::CallExpr *RSSetObjectCall = |
| new(C) clang::CallExpr(C, |
| RSSetObjectFP, |
| ArgList, |
| SetObjectFD->getCallResultType(), |
| clang::VK_RValue, |
| Loc); |
| |
| std::list<clang::Stmt*> StmtList; |
| StmtList.push_back(RSSetObjectCall); |
| AppendAfterStmt(C, mCS, DS, StmtList); |
| |
| return; |
| } |
| |
| void RSObjectRefCount::Scope::InsertLocalVarDestructors() { |
| for (std::list<clang::VarDecl*>::const_iterator I = mRSO.begin(), |
| E = mRSO.end(); |
| I != E; |
| I++) { |
| clang::VarDecl *VD = *I; |
| clang::Stmt *RSClearObjectCall = ClearRSObject(VD, VD->getDeclContext()); |
| if (RSClearObjectCall) { |
| DestructorVisitor DV((*mRSO.begin())->getASTContext(), |
| mCS, |
| RSClearObjectCall, |
| VD->getSourceRange().getBegin()); |
| DV.Visit(mCS); |
| DV.InsertDestructors(); |
| } |
| } |
| return; |
| } |
| |
| clang::Stmt *RSObjectRefCount::Scope::ClearRSObject( |
| clang::VarDecl *VD, |
| clang::DeclContext *DC) { |
| slangAssert(VD); |
| clang::ASTContext &C = VD->getASTContext(); |
| clang::SourceLocation Loc = VD->getLocation(); |
| clang::SourceLocation StartLoc = VD->getInnerLocStart(); |
| const clang::Type *T = RSExportType::GetTypeOfDecl(VD); |
| |
| // Reference expr to target RS object variable |
| clang::DeclRefExpr *RefRSVar = |
| clang::DeclRefExpr::Create(C, |
| clang::NestedNameSpecifierLoc(), |
| clang::SourceLocation(), |
| VD, |
| false, |
| Loc, |
| T->getCanonicalTypeInternal(), |
| clang::VK_RValue, |
| NULL); |
| |
| if (T->isArrayType()) { |
| return ClearArrayRSObject(C, DC, RefRSVar, StartLoc, Loc); |
| } |
| |
| RSExportPrimitiveType::DataType DT = |
| RSExportPrimitiveType::GetRSSpecificType(T); |
| |
| if (DT == RSExportPrimitiveType::DataTypeUnknown || |
| DT == RSExportPrimitiveType::DataTypeIsStruct) { |
| return ClearStructRSObject(C, DC, RefRSVar, StartLoc, Loc); |
| } |
| |
| slangAssert((RSExportPrimitiveType::IsRSObjectType(DT)) && |
| "Should be RS object"); |
| |
| return ClearSingleRSObject(C, RefRSVar, Loc); |
| } |
| |
| bool RSObjectRefCount::InitializeRSObject(clang::VarDecl *VD, |
| RSExportPrimitiveType::DataType *DT, |
| clang::Expr **InitExpr) { |
| slangAssert(VD && DT && InitExpr); |
| const clang::Type *T = RSExportType::GetTypeOfDecl(VD); |
| |
| // Loop through array types to get to base type |
| while (T && T->isArrayType()) { |
| T = T->getArrayElementTypeNoTypeQual(); |
| } |
| |
| bool DataTypeIsStructWithRSObject = false; |
| *DT = RSExportPrimitiveType::GetRSSpecificType(T); |
| |
| if (*DT == RSExportPrimitiveType::DataTypeUnknown) { |
| if (RSExportPrimitiveType::IsStructureTypeWithRSObject(T)) { |
| *DT = RSExportPrimitiveType::DataTypeIsStruct; |
| DataTypeIsStructWithRSObject = true; |
| } else { |
| return false; |
| } |
| } |
| |
| bool DataTypeIsRSObject = false; |
| if (DataTypeIsStructWithRSObject) { |
| DataTypeIsRSObject = true; |
| } else { |
| DataTypeIsRSObject = RSExportPrimitiveType::IsRSObjectType(*DT); |
| } |
| *InitExpr = VD->getInit(); |
| |
| if (!DataTypeIsRSObject && *InitExpr) { |
| // If we already have an initializer for a matrix type, we are done. |
| return DataTypeIsRSObject; |
| } |
| |
| clang::Expr *ZeroInitializer = |
| CreateZeroInitializerForRSSpecificType(*DT, |
| VD->getASTContext(), |
| VD->getLocation()); |
| |
| if (ZeroInitializer) { |
| ZeroInitializer->setType(T->getCanonicalTypeInternal()); |
| VD->setInit(ZeroInitializer); |
| } |
| |
| return DataTypeIsRSObject; |
| } |
| |
| clang::Expr *RSObjectRefCount::CreateZeroInitializerForRSSpecificType( |
| RSExportPrimitiveType::DataType DT, |
| clang::ASTContext &C, |
| const clang::SourceLocation &Loc) { |
| clang::Expr *Res = NULL; |
| switch (DT) { |
| case RSExportPrimitiveType::DataTypeIsStruct: |
| case RSExportPrimitiveType::DataTypeRSElement: |
| case RSExportPrimitiveType::DataTypeRSType: |
| case RSExportPrimitiveType::DataTypeRSAllocation: |
| case RSExportPrimitiveType::DataTypeRSSampler: |
| case RSExportPrimitiveType::DataTypeRSScript: |
| case RSExportPrimitiveType::DataTypeRSMesh: |
| case RSExportPrimitiveType::DataTypeRSPath: |
| case RSExportPrimitiveType::DataTypeRSProgramFragment: |
| case RSExportPrimitiveType::DataTypeRSProgramVertex: |
| case RSExportPrimitiveType::DataTypeRSProgramRaster: |
| case RSExportPrimitiveType::DataTypeRSProgramStore: |
| case RSExportPrimitiveType::DataTypeRSFont: { |
| // (ImplicitCastExpr 'nullptr_t' |
| // (IntegerLiteral 0))) |
| llvm::APInt Zero(C.getTypeSize(C.IntTy), 0); |
| clang::Expr *Int0 = clang::IntegerLiteral::Create(C, Zero, C.IntTy, Loc); |
| clang::Expr *CastToNull = |
| clang::ImplicitCastExpr::Create(C, |
| C.NullPtrTy, |
| clang::CK_IntegralToPointer, |
| Int0, |
| NULL, |
| clang::VK_RValue); |
| |
| llvm::SmallVector<clang::Expr*, 1>InitList; |
| InitList.push_back(CastToNull); |
| |
| Res = new(C) clang::InitListExpr(C, Loc, InitList, Loc); |
| break; |
| } |
| case RSExportPrimitiveType::DataTypeRSMatrix2x2: |
| case RSExportPrimitiveType::DataTypeRSMatrix3x3: |
| case RSExportPrimitiveType::DataTypeRSMatrix4x4: { |
| // RS matrix is not completely an RS object. They hold data by themselves. |
| // (InitListExpr rs_matrix2x2 |
| // (InitListExpr float[4] |
| // (FloatingLiteral 0) |
| // (FloatingLiteral 0) |
| // (FloatingLiteral 0) |
| // (FloatingLiteral 0))) |
| clang::QualType FloatTy = C.FloatTy; |
| // Constructor sets value to 0.0f by default |
| llvm::APFloat Val(C.getFloatTypeSemantics(FloatTy)); |
| clang::FloatingLiteral *Float0Val = |
| clang::FloatingLiteral::Create(C, |
| Val, |
| /* isExact = */true, |
| FloatTy, |
| Loc); |
| |
| unsigned N = 0; |
| if (DT == RSExportPrimitiveType::DataTypeRSMatrix2x2) |
| N = 2; |
| else if (DT == RSExportPrimitiveType::DataTypeRSMatrix3x3) |
| N = 3; |
| else if (DT == RSExportPrimitiveType::DataTypeRSMatrix4x4) |
| N = 4; |
| unsigned N_2 = N * N; |
| |
| // Assume we are going to be allocating 16 elements, since 4x4 is max. |
| llvm::SmallVector<clang::Expr*, 16> InitVals; |
| for (unsigned i = 0; i < N_2; i++) |
| InitVals.push_back(Float0Val); |
| clang::Expr *InitExpr = |
| new(C) clang::InitListExpr(C, Loc, InitVals, Loc); |
| InitExpr->setType(C.getConstantArrayType(FloatTy, |
| llvm::APInt(32, N_2), |
| clang::ArrayType::Normal, |
| /* EltTypeQuals = */0)); |
| llvm::SmallVector<clang::Expr*, 1> InitExprVec; |
| InitExprVec.push_back(InitExpr); |
| |
| Res = new(C) clang::InitListExpr(C, Loc, InitExprVec, Loc); |
| break; |
| } |
| case RSExportPrimitiveType::DataTypeUnknown: |
| case RSExportPrimitiveType::DataTypeFloat16: |
| case RSExportPrimitiveType::DataTypeFloat32: |
| case RSExportPrimitiveType::DataTypeFloat64: |
| case RSExportPrimitiveType::DataTypeSigned8: |
| case RSExportPrimitiveType::DataTypeSigned16: |
| case RSExportPrimitiveType::DataTypeSigned32: |
| case RSExportPrimitiveType::DataTypeSigned64: |
| case RSExportPrimitiveType::DataTypeUnsigned8: |
| case RSExportPrimitiveType::DataTypeUnsigned16: |
| case RSExportPrimitiveType::DataTypeUnsigned32: |
| case RSExportPrimitiveType::DataTypeUnsigned64: |
| case RSExportPrimitiveType::DataTypeBoolean: |
| case RSExportPrimitiveType::DataTypeUnsigned565: |
| case RSExportPrimitiveType::DataTypeUnsigned5551: |
| case RSExportPrimitiveType::DataTypeUnsigned4444: |
| case RSExportPrimitiveType::DataTypeMax: { |
| slangAssert(false && "Not RS object type!"); |
| } |
| // No default case will enable compiler detecting the missing cases |
| } |
| |
| return Res; |
| } |
| |
| void RSObjectRefCount::VisitDeclStmt(clang::DeclStmt *DS) { |
| for (clang::DeclStmt::decl_iterator I = DS->decl_begin(), E = DS->decl_end(); |
| I != E; |
| I++) { |
| clang::Decl *D = *I; |
| if (D->getKind() == clang::Decl::Var) { |
| clang::VarDecl *VD = static_cast<clang::VarDecl*>(D); |
| RSExportPrimitiveType::DataType DT = |
| RSExportPrimitiveType::DataTypeUnknown; |
| clang::Expr *InitExpr = NULL; |
| if (InitializeRSObject(VD, &DT, &InitExpr)) { |
| getCurrentScope()->addRSObject(VD); |
| getCurrentScope()->AppendRSObjectInit(VD, DS, DT, InitExpr); |
| } |
| } |
| } |
| return; |
| } |
| |
| void RSObjectRefCount::VisitCompoundStmt(clang::CompoundStmt *CS) { |
| if (!CS->body_empty()) { |
| // Push a new scope |
| Scope *S = new Scope(CS); |
| mScopeStack.push(S); |
| |
| VisitStmt(CS); |
| |
| // Destroy the scope |
| slangAssert((getCurrentScope() == S) && "Corrupted scope stack!"); |
| S->InsertLocalVarDestructors(); |
| mScopeStack.pop(); |
| delete S; |
| } |
| return; |
| } |
| |
| void RSObjectRefCount::VisitBinAssign(clang::BinaryOperator *AS) { |
| clang::QualType QT = AS->getType(); |
| |
| if (CountRSObjectTypes(mCtx, QT.getTypePtr(), AS->getExprLoc())) { |
| getCurrentScope()->ReplaceRSObjectAssignment(AS); |
| } |
| |
| return; |
| } |
| |
| void RSObjectRefCount::VisitStmt(clang::Stmt *S) { |
| for (clang::Stmt::child_iterator I = S->child_begin(), E = S->child_end(); |
| I != E; |
| I++) { |
| if (clang::Stmt *Child = *I) { |
| Visit(Child); |
| } |
| } |
| return; |
| } |
| |
| // This function walks the list of global variables and (potentially) creates |
| // a single global static destructor function that properly decrements |
| // reference counts on the contained RS object types. |
| clang::FunctionDecl *RSObjectRefCount::CreateStaticGlobalDtor() { |
| Init(); |
| |
| clang::DeclContext *DC = mCtx.getTranslationUnitDecl(); |
| clang::SourceLocation loc; |
| |
| llvm::StringRef SR(".rs.dtor"); |
| clang::IdentifierInfo &II = mCtx.Idents.get(SR); |
| clang::DeclarationName N(&II); |
| clang::FunctionProtoType::ExtProtoInfo EPI; |
| clang::QualType T = mCtx.getFunctionType(mCtx.VoidTy, NULL, 0, EPI); |
| clang::FunctionDecl *FD = NULL; |
| |
| // Generate rsClearObject() call chains for every global variable |
| // (whether static or extern). |
| std::list<clang::Stmt *> StmtList; |
| for (clang::DeclContext::decl_iterator I = DC->decls_begin(), |
| E = DC->decls_end(); I != E; I++) { |
| clang::VarDecl *VD = llvm::dyn_cast<clang::VarDecl>(*I); |
| if (VD) { |
| if (CountRSObjectTypes(mCtx, VD->getType().getTypePtr(), loc)) { |
| if (!FD) { |
| // Only create FD if we are going to use it. |
| FD = clang::FunctionDecl::Create(mCtx, DC, loc, loc, N, T, NULL); |
| } |
| // Make sure to create any helpers within the function's DeclContext, |
| // not the one associated with the global translation unit. |
| clang::Stmt *RSClearObjectCall = Scope::ClearRSObject(VD, FD); |
| StmtList.push_back(RSClearObjectCall); |
| } |
| } |
| } |
| |
| // Nothing needs to be destroyed, so don't emit a dtor. |
| if (StmtList.empty()) { |
| return NULL; |
| } |
| |
| clang::CompoundStmt *CS = BuildCompoundStmt(mCtx, StmtList, loc); |
| |
| FD->setBody(CS); |
| |
| return FD; |
| } |
| |
| } // namespace slang |
