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 #ifndef _LINKER_DEBUG_H_ 30 #define _LINKER_DEBUG_H_ 31 32 // You can increase the verbosity of debug traces by defining the LD_DEBUG 33 // environment variable to a numeric value from 0 to 2 (corresponding to 34 // INFO, TRACE, and DEBUG calls in the source). This will only 35 // affect new processes being launched. 36 37 // By default, traces are sent to logcat, with the "linker" tag. You can 38 // change this to go to stdout instead by setting the definition of 39 // LINKER_DEBUG_TO_LOG to 0. 40 #define LINKER_DEBUG_TO_LOG 1 41 42 #define TRACE_DEBUG 1 43 #define DO_TRACE_LOOKUP 1 44 #define DO_TRACE_RELO 1 45 #define DO_TRACE_IFUNC 1 46 #define TIMING 0 47 #define STATS 0 48 #define COUNT_PAGES 0 49 50 /********************************************************************* 51 * You shouldn't need to modify anything below unless you are adding 52 * more debugging information. 53 * 54 * To enable/disable specific debug options, change the defines above 55 *********************************************************************/ 56 57 #include <unistd.h> 58 59 #include <async_safe/log.h> 60 61 __LIBC_HIDDEN__ extern int g_ld_debug_verbosity; 62 63 #if LINKER_DEBUG_TO_LOG 64 #define _PRINTVF(v, x...) \ 65 do { \ 66 if (g_ld_debug_verbosity > (v)) async_safe_format_log(5-(v), "linker", x); \ 67 } while (0) 68 #else /* !LINKER_DEBUG_TO_LOG */ 69 #define _PRINTVF(v, x...) \ 70 do { \ 71 if (g_ld_debug_verbosity > (v)) { async_safe_format_fd(1, x); write(1, "\n", 1); } \ 72 } while (0) 73 #endif /* !LINKER_DEBUG_TO_LOG */ 74 75 #define PRINT(x...) _PRINTVF(-1, x) 76 #define INFO(x...) _PRINTVF(0, x) 77 #define TRACE(x...) _PRINTVF(1, x) 78 79 #if TRACE_DEBUG 80 #define DEBUG(x...) _PRINTVF(2, "DEBUG: " x) 81 #else /* !TRACE_DEBUG */ 82 #define DEBUG(x...) do {} while (0) 83 #endif /* TRACE_DEBUG */ 84 85 #define TRACE_TYPE(t, x...) do { if (DO_TRACE_##t) { TRACE(x); } } while (0) 86 87 #if COUNT_PAGES 88 extern uint32_t bitmask[]; 89 #if defined(__LP64__) 90 #define MARK(offset) \ 91 do { \ 92 if ((((offset) >> 12) >> 5) < 4096) \ 93 bitmask[((offset) >> 12) >> 5] |= (1 << (((offset) >> 12) & 31)); \ 94 } while (0) 95 #else 96 #define MARK(offset) \ 97 do { \ 98 bitmask[((offset) >> 12) >> 3] |= (1 << (((offset) >> 12) & 7)); \ 99 } while (0) 100 #endif 101 #else 102 #define MARK(x) do {} while (0) 103 104 #endif 105 106 #endif /* _LINKER_DEBUG_H_ */ 107