1 /* 2 * Copyright (C) 2008 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 // You can increase the verbosity of debug traces by defining the LD_DEBUG 32 // environment variable to a numeric value from 0 to 2 (corresponding to 33 // INFO, TRACE, and DEBUG calls in the source). This will only 34 // affect new processes being launched. 35 36 // By default, traces are sent to logcat, with the "linker" tag. You can 37 // change this to go to stdout instead by setting the definition of 38 // LINKER_DEBUG_TO_LOG to 0. 39 #define LINKER_DEBUG_TO_LOG 1 40 41 #define TRACE_DEBUG 1 42 #define DO_TRACE_LOOKUP 1 43 #define DO_TRACE_RELO 1 44 #define DO_TRACE_IFUNC 1 45 #define TIMING 0 46 #define STATS 0 47 48 /********************************************************************* 49 * You shouldn't need to modify anything below unless you are adding 50 * more debugging information. 51 * 52 * To enable/disable specific debug options, change the defines above 53 *********************************************************************/ 54 55 #include <stdarg.h> 56 #include <unistd.h> 57 58 #include <async_safe/log.h> 59 #include <async_safe/CHECK.h> 60 61 #define LINKER_VERBOSITY_PRINT (-1) 62 #define LINKER_VERBOSITY_INFO 0 63 #define LINKER_VERBOSITY_TRACE 1 64 #define LINKER_VERBOSITY_DEBUG 2 65 66 __LIBC_HIDDEN__ extern int g_ld_debug_verbosity; 67 68 __LIBC_HIDDEN__ void linker_log_va_list(int prio, const char* fmt, va_list ap); 69 __LIBC_HIDDEN__ void linker_log(int prio, const char* fmt, ...) __printflike(2, 3); 70 71 #define _PRINTVF(v, x...) \ 72 do { \ 73 if (g_ld_debug_verbosity > (v)) linker_log((v), x); \ 74 } while (0) 75 76 #define PRINT(x...) _PRINTVF(LINKER_VERBOSITY_PRINT, x) 77 #define INFO(x...) _PRINTVF(LINKER_VERBOSITY_INFO, x) 78 #define TRACE(x...) _PRINTVF(LINKER_VERBOSITY_TRACE, x) 79 80 #if TRACE_DEBUG 81 #define DEBUG(x...) _PRINTVF(LINKER_VERBOSITY_DEBUG, "DEBUG: " x) 82 #else /* !TRACE_DEBUG */ 83 #define DEBUG(x...) do {} while (0) 84 #endif /* TRACE_DEBUG */ 85 86 #define TRACE_TYPE(t, x...) do { if (DO_TRACE_##t) { TRACE(x); } } while (0) 87