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 #define COUNT_PAGES 0 48 49 /********************************************************************* 50 * You shouldn't need to modify anything below unless you are adding 51 * more debugging information. 52 * 53 * To enable/disable specific debug options, change the defines above 54 *********************************************************************/ 55 56 #include <unistd.h> 57 58 #include <async_safe/log.h> 59 60 __LIBC_HIDDEN__ extern int g_ld_debug_verbosity; 61 62 #if LINKER_DEBUG_TO_LOG 63 #define _PRINTVF(v, x...) \ 64 do { \ 65 if (g_ld_debug_verbosity > (v)) async_safe_format_log(5-(v), "linker", x); \ 66 } while (0) 67 #else /* !LINKER_DEBUG_TO_LOG */ 68 #define _PRINTVF(v, x...) \ 69 do { \ 70 if (g_ld_debug_verbosity > (v)) { async_safe_format_fd(1, x); write(1, "\n", 1); } \ 71 } while (0) 72 #endif /* !LINKER_DEBUG_TO_LOG */ 73 74 #define PRINT(x...) _PRINTVF(-1, x) 75 #define INFO(x...) _PRINTVF(0, x) 76 #define TRACE(x...) _PRINTVF(1, x) 77 78 #if TRACE_DEBUG 79 #define DEBUG(x...) _PRINTVF(2, "DEBUG: " x) 80 #else /* !TRACE_DEBUG */ 81 #define DEBUG(x...) do {} while (0) 82 #endif /* TRACE_DEBUG */ 83 84 #define TRACE_TYPE(t, x...) do { if (DO_TRACE_##t) { TRACE(x); } } while (0) 85 86 #if COUNT_PAGES 87 extern uint32_t bitmask[]; 88 #if defined(__LP64__) 89 #define MARK(offset) \ 90 do { \ 91 if ((((offset) >> 12) >> 5) < 4096) \ 92 bitmask[((offset) >> 12) >> 5] |= (1 << (((offset) >> 12) & 31)); \ 93 } while (0) 94 #else 95 #define MARK(offset) \ 96 do { \ 97 bitmask[((offset) >> 12) >> 3] |= (1 << (((offset) >> 12) & 7)); \ 98 } while (0) 99 #endif 100 #else 101 #define MARK(x) do {} while (0) 102 103 #endif 104
