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 ART_TARGET_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 ART_TARGET_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 extern "C" void EnsureFrontOfChain(int signal ATTRIBUTE_UNUSED) { 52 log("EnsureFrontOfChain is not exported by the main executable."); 53 abort(); 54 } 55 56 extern "C" void AddSpecialSignalHandlerFn(int signal ATTRIBUTE_UNUSED, 57 SigchainAction* sa ATTRIBUTE_UNUSED) { 58 log("SetSpecialSignalHandlerFn is not exported by the main executable."); 59 abort(); 60 } 61 62 extern "C" void RemoveSpecialSignalHandlerFn(int signal ATTRIBUTE_UNUSED, 63 bool (*fn)(int, siginfo_t*, void*) ATTRIBUTE_UNUSED) { 64 log("SetSpecialSignalHandlerFn is not exported by the main executable."); 65 abort(); 66 } 67 68 #pragma GCC diagnostic pop 69 70 } // namespace art 71
