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 <iostream> 20 #include <string> 21 22 #include "location.h" 23 24 class AidlNode; 25 26 // Generic point for printing any error in the AIDL compiler. 27 class AidlErrorLog { 28 public: 29 enum Severity { NO_OP, WARNING, ERROR, FATAL }; 30 31 AidlErrorLog(Severity severity, const AidlLocation& location, const std::string& suffix = ""); 32 AidlErrorLog(Severity severity, const std::string& filename); 33 AidlErrorLog(Severity severity, const AidlNode& node); AidlErrorLog(Severity severity,const AidlNode * node)34 AidlErrorLog(Severity severity, const AidlNode* node) : AidlErrorLog(severity, *node) {} 35 36 template <typename T> AidlErrorLog(Severity severity,const std::unique_ptr<T> & node)37 AidlErrorLog(Severity severity, const std::unique_ptr<T>& node) : AidlErrorLog(severity, *node) {} 38 ~AidlErrorLog(); 39 40 // AidlErrorLog is a single use object. No need to copy 41 AidlErrorLog(const AidlErrorLog&) = delete; 42 AidlErrorLog& operator=(const AidlErrorLog&) = delete; 43 44 // btw, making it movable so that functions can return it. 45 AidlErrorLog(AidlErrorLog&&) = default; 46 AidlErrorLog& operator=(AidlErrorLog&&) = default; 47 48 template <typename T> 49 AidlErrorLog& operator<<(T&& arg) { 50 if (severity_ != NO_OP) { 51 (*os_) << std::forward<T>(arg); 52 } 53 return *this; 54 } 55 clearError()56 static void clearError() { sHadError = false; } hadError()57 static bool hadError() { return sHadError; } 58 59 private: 60 std::ostream* os_; 61 Severity severity_; 62 const AidlLocation location_; 63 const std::string suffix_; 64 static bool sHadError; 65 }; 66 67 // A class used to make it obvious to clang that code is going to abort. This 68 // informs static analyses of the aborting behavior of `AIDL_FATAL`, and 69 // helps generate slightly faster/smaller code. 70 class AidlAbortOnDestruction { 71 public: ~AidlAbortOnDestruction()72 __attribute__((noreturn)) ~AidlAbortOnDestruction() { abort(); } 73 }; 74 75 #define AIDL_ERROR(CONTEXT) ::AidlErrorLog(AidlErrorLog::ERROR, (CONTEXT)) 76 #define AIDL_FATAL(CONTEXT) \ 77 (::AidlAbortOnDestruction(), ::AidlErrorLog(AidlErrorLog::FATAL, (CONTEXT))) 78 #define AIDL_FATAL_IF(CONDITION, CONTEXT) \ 79 if (CONDITION) AIDL_FATAL(CONTEXT) << "Bad internal state: " << #CONDITION << ": " 80