1 /* 2 * Copyright (C) 2014 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 #include <stdio.h> 18 #include <stdlib.h> 19 20 #ifdef __ANDROID__ 21 #include <android/log.h> 22 #else 23 #include <stdarg.h> 24 #include <iostream> 25 #endif 26 27 #include "sigchain.h" 28 29 #define ATTRIBUTE_UNUSED __attribute__((__unused__)) 30 31 // We cannot annotate the declarations, as they are not no-return in the non-dummy version. 32 #pragma GCC diagnostic push 33 #pragma GCC diagnostic ignored "-Wunknown-pragmas" 34 #pragma GCC diagnostic ignored "-Wmissing-noreturn" 35 36 static void log(const char* format, ...) { 37 char buf[256]; 38 va_list ap; 39 va_start(ap, format); 40 vsnprintf(buf, sizeof(buf), format, ap); 41 #ifdef __ANDROID__ 42 __android_log_write(ANDROID_LOG_ERROR, "libsigchain", buf); 43 #else 44 std::cout << buf << "\n"; 45 #endif 46 va_end(ap); 47 } 48 49 namespace art { 50 51 52 extern "C" void ClaimSignalChain(int signal ATTRIBUTE_UNUSED, 53 struct sigaction* oldaction ATTRIBUTE_UNUSED) { 54 log("ClaimSignalChain is not exported by the main executable."); 55 abort(); 56 } 57 58 extern "C" void UnclaimSignalChain(int signal ATTRIBUTE_UNUSED) { 59 log("UnclaimSignalChain is not exported by the main executable."); 60 abort(); 61 } 62 63 extern "C" void InvokeUserSignalHandler(int sig ATTRIBUTE_UNUSED, 64 siginfo_t* info ATTRIBUTE_UNUSED, 65 void* context ATTRIBUTE_UNUSED) { 66 log("InvokeUserSignalHandler is not exported by the main executable."); 67 abort(); 68 } 69 70 extern "C" void InitializeSignalChain() { 71 log("InitializeSignalChain is not exported by the main executable."); 72 abort(); 73 } 74 75 extern "C" void EnsureFrontOfChain(int signal ATTRIBUTE_UNUSED, 76 struct sigaction* expected_action ATTRIBUTE_UNUSED) { 77 log("EnsureFrontOfChain is not exported by the main executable."); 78 abort(); 79 } 80 81 extern "C" void SetSpecialSignalHandlerFn(int signal ATTRIBUTE_UNUSED, 82 SpecialSignalHandlerFn fn ATTRIBUTE_UNUSED) { 83 log("SetSpecialSignalHandlerFn is not exported by the main executable."); 84 abort(); 85 } 86 87 #pragma GCC diagnostic pop 88 89 } // namespace art 90
