1/* 2 * Copyright 2012, The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#ifndef _FRAMEWORKS_COMPILE_SLANG_SLANG_RS_CHECK_AST_H_ // NOLINT 18#define _FRAMEWORKS_COMPILE_SLANG_SLANG_RS_CHECK_AST_H_ 19 20#include "slang_assert.h" 21#include "clang/AST/ASTContext.h" 22#include "clang/AST/StmtVisitor.h" 23 24namespace slang { 25 26// This class is designed to walk a Renderscript/Filterscript AST looking for 27// violations. Examples of violations for FS are pointer declarations and 28// casts (i.e. no pointers allowed in FS whatsoever). 29class RSCheckAST : public clang::StmtVisitor<RSCheckAST> { 30 private: 31 clang::ASTContext &C; 32 clang::DiagnosticsEngine &mDiagEngine; 33 clang::SourceManager &mSM; 34 bool mValid; 35 unsigned int mTargetAPI; 36 bool mIsFilterscript; 37 bool mInKernel; 38 39 /// @brief Emit warnings for inapproriate uses of rsSetElementAt 40 /// 41 /// We warn in case generic rsSetElementAt() is used even though the user 42 /// could have used a typed rsSetElementAt_<type>() call. Typed calls 43 /// allow more aggressive optimization (e.g. due to better alias analysis 44 /// results). Hence, we want to steer the users to use them. 45 void WarnOnSetElementAt(clang::CallExpr*); 46 47 public: 48 explicit RSCheckAST(clang::ASTContext &Con, unsigned int TargetAPI, 49 bool IsFilterscript) 50 : C(Con), mDiagEngine(Con.getDiagnostics()), mSM(C.getSourceManager()), 51 mValid(true), mTargetAPI(TargetAPI), mIsFilterscript(IsFilterscript), 52 mInKernel(false) { 53 return; 54 } 55 56 void VisitStmt(clang::Stmt *S); 57 58 void VisitCallExpr(clang::CallExpr *CE); 59 60 void VisitCastExpr(clang::CastExpr *CE); 61 62 void VisitExpr(clang::Expr *E); 63 64 void VisitDeclStmt(clang::DeclStmt *DS); 65 66 void ValidateFunctionDecl(clang::FunctionDecl *FD); 67 68 void ValidateVarDecl(clang::VarDecl *VD); 69 70 bool Validate(); 71}; 72 73} // namespace slang 74 75#endif // _FRAMEWORKS_COMPILE_SLANG_SLANG_RS_CHECK_AST_H_ NOLINT 76