1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #pragma once 30 31 #include "linker_debug.h" 32 33 #include <link.h> 34 #include <stddef.h> 35 36 #include <string> 37 #include <unordered_map> 38 39 #include <async_safe/log.h> 40 41 #define DL_ERR(fmt, x...) \ 42 do { \ 43 async_safe_format_buffer(linker_get_error_buffer(), linker_get_error_buffer_size(), fmt, ##x); \ 44 } while (false) 45 46 #define DL_WARN(fmt, x...) \ 47 do { \ 48 async_safe_format_log(ANDROID_LOG_WARN, "linker", fmt, ##x); \ 49 async_safe_format_fd(2, "WARNING: linker: "); \ 50 async_safe_format_fd(2, fmt, ##x); \ 51 async_safe_format_fd(2, "\n"); \ 52 } while (false) 53 54 bool DL_ERROR_AFTER(int target_sdk_version, const char* fmt, ...) __printflike(2, 3); 55 56 #define DL_ERR_AND_LOG(fmt, x...) \ 57 do { \ 58 DL_ERR(fmt, ##x); \ 59 __linker_log(ANDROID_LOG_ERROR, fmt, ##x); \ 60 } while (false) 61 62 #define DL_OPEN_ERR(fmt, x...) \ 63 do { \ 64 DL_ERR(fmt, ##x); \ 65 LD_LOG(kLogDlopen, fmt, ##x); \ 66 } while (false) 67 68 #define DL_SYM_ERR(fmt, x...) \ 69 do { \ 70 DL_ERR(fmt, ##x); \ 71 LD_LOG(kLogDlsym, fmt, ##x); \ 72 } while (false) 73 74 constexpr ElfW(Versym) kVersymNotNeeded = 0; 75 constexpr ElfW(Versym) kVersymGlobal = 1; 76 77 // These values are used to call constructors for .init_array && .preinit_array 78 extern int g_argc; 79 extern char** g_argv; 80 extern char** g_envp; 81 82 struct soinfo; 83 struct android_namespace_t; 84 struct platform_properties; 85 86 extern android_namespace_t g_default_namespace; 87 88 extern std::unordered_map<uintptr_t, soinfo*> g_soinfo_handles_map; 89 90 extern platform_properties g_platform_properties; 91 92 // Error buffer "variable" 93 char* linker_get_error_buffer(); 94 size_t linker_get_error_buffer_size(); 95 96 class DlErrorRestorer { 97 public: DlErrorRestorer()98 DlErrorRestorer() { 99 saved_error_msg_ = linker_get_error_buffer(); 100 } ~DlErrorRestorer()101 ~DlErrorRestorer() { 102 strlcpy(linker_get_error_buffer(), saved_error_msg_.c_str(), linker_get_error_buffer_size()); 103 } 104 private: 105 std::string saved_error_msg_; 106 }; 107 108 __LIBC_HIDDEN__ extern bool g_is_ldd; 109 __LIBC_HIDDEN__ extern pthread_mutex_t g_dl_mutex; 110