1 /* 2 * Copyright (C) 2016 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 <dlfcn.h> 18 #include <stdlib.h> 19 20 static void* g_libc_close_ptr; 21 22 static void __attribute__((constructor)) __libc_close_lookup() { 23 g_libc_close_ptr = dlsym(RTLD_NEXT, "close"); 24 } 25 26 // A libc function used for RTLD_NEXT 27 // This function in not supposed to be called 28 extern "C" int __attribute__((weak)) close(int) { 29 abort(); 30 } 31 32 extern "C" void* get_libc_close_ptr() { 33 return g_libc_close_ptr; 34 } 35 36 37
