1 /* 2 * Copyright (C) 2015, 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 #pragma once 18 19 #include "aidl_language.h" 20 21 #include <iostream> 22 23 // We must include windows.h before android-base/logging.h on Windows. 24 #ifdef _WIN32 25 #include <windows.h> 26 #endif 27 28 #include <android-base/logging.h> 29 30 // Generic point for printing any error in the AIDL compiler. 31 class AidlErrorLog { 32 public: AidlErrorLog(bool fatal,const AidlLocation & location)33 AidlErrorLog(bool fatal, const AidlLocation& location) 34 : os_(std::cerr), fatal_(fatal), location_(location) { 35 sHadError = true; 36 37 os_ << "ERROR: "; 38 os_ << location << ": "; 39 } AidlErrorLog(bool fatal,const std::string & filename)40 AidlErrorLog(bool fatal, const std::string& filename) 41 : AidlErrorLog(fatal, AidlLocation(filename, AidlLocation::Source::EXTERNAL)) {} AidlErrorLog(bool fatal,const AidlNode & node)42 AidlErrorLog(bool fatal, const AidlNode& node) : AidlErrorLog(fatal, node.location_) {} AidlErrorLog(bool fatal,const AidlNode * node)43 AidlErrorLog(bool fatal, const AidlNode* node) : AidlErrorLog(fatal, *node) {} 44 45 template <typename T> AidlErrorLog(bool fatal,const std::unique_ptr<T> & node)46 AidlErrorLog(bool fatal, const std::unique_ptr<T>& node) : AidlErrorLog(fatal, *node) {} ~AidlErrorLog()47 ~AidlErrorLog() { 48 os_ << std::endl; 49 if (fatal_) abort(); 50 if (location_.IsInternal()) { 51 os_ << "Logging an internal location should not happen. Offending location: " << location_ 52 << std::endl; 53 abort(); 54 } 55 } 56 57 // AidlErrorLog is a single use object. No need to copy or move 58 AidlErrorLog(const AidlErrorLog&) = delete; 59 AidlErrorLog(AidlErrorLog&&) = delete; 60 AidlErrorLog& operator=(const AidlErrorLog&) = delete; 61 AidlErrorLog& operator=(AidlErrorLog&&) = delete; 62 63 std::ostream& os_; 64 clearError()65 static void clearError() { sHadError = false; } hadError()66 static bool hadError() { return sHadError; } 67 68 private: 69 bool fatal_; 70 const AidlLocation location_; 71 static bool sHadError; 72 }; 73 74 // A class used to make it obvious to clang that code is going to abort. This 75 // informs static analyses of the aborting behavior of `AIDL_FATAL`, and 76 // helps generate slightly faster/smaller code. 77 class AidlAbortOnDestruction { 78 public: ~AidlAbortOnDestruction()79 __attribute__((noreturn)) ~AidlAbortOnDestruction() { abort(); } 80 }; 81 82 #define AIDL_ERROR(CONTEXT) ::AidlErrorLog(false /*fatal*/, (CONTEXT)).os_ 83 #define AIDL_FATAL(CONTEXT) \ 84 (::AidlAbortOnDestruction(), ::AidlErrorLog(true /*fatal*/, (CONTEXT)).os_) 85 #define AIDL_FATAL_IF(CONDITION, CONTEXT) \ 86 if (CONDITION) AIDL_FATAL(CONTEXT) << "Bad internal state: " << #CONDITION << ": " 87