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 <stdlib.h> 32 #include <limits.h> 33 34 #include "private/bionic_systrace.h" 35 36 #include <android-base/macros.h> 37 38 #define LD_LOG(type, x...) \ 39 do { \ 40 if (g_linker_logger.IsEnabled(type)) g_linker_logger.Log(x); \ 41 } while (0) 42 43 constexpr const uint32_t kLogErrors = 1 << 0; 44 constexpr const uint32_t kLogDlopen = 1 << 1; 45 constexpr const uint32_t kLogDlsym = 1 << 2; 46 47 class LinkerLogger { 48 public: LinkerLogger()49 LinkerLogger() : flags_(0) { } 50 51 void ResetState(); 52 void Log(const char* format, ...) __printflike(2, 3); 53 IsEnabled(uint32_t type)54 uint32_t IsEnabled(uint32_t type) { 55 return flags_ & type; 56 } 57 58 private: 59 uint32_t flags_; 60 61 DISALLOW_COPY_AND_ASSIGN(LinkerLogger); 62 }; 63 64 extern LinkerLogger g_linker_logger; 65 extern char** g_argv; 66