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 "private/libc_logging.h" 58 #include <unistd.h> 59 60 __LIBC_HIDDEN__ extern int g_ld_debug_verbosity; 61 62 #define CHECK(predicate) { \ 63 if (!(predicate)) { \ 64 __libc_fatal("%s:%d: %s CHECK '" #predicate "' failed", \ 65 __FILE__, __LINE__, __FUNCTION__); \ 66 } \ 67 } 68 69 #if LINKER_DEBUG_TO_LOG 70 #define _PRINTVF(v, x...) \ 71 do { \ 72 if (g_ld_debug_verbosity > (v)) __libc_format_log(5-(v), "linker", x); \ 73 } while (0) 74 #else /* !LINKER_DEBUG_TO_LOG */ 75 #define _PRINTVF(v, x...) \ 76 do { \ 77 if (g_ld_debug_verbosity > (v)) { __libc_format_fd(1, x); write(1, "\n", 1); } \ 78 } while (0) 79 #endif /* !LINKER_DEBUG_TO_LOG */ 80 81 #define PRINT(x...) _PRINTVF(-1, x) 82 #define INFO(x...) _PRINTVF(0, x) 83 #define TRACE(x...) _PRINTVF(1, x) 84 85 #if TRACE_DEBUG 86 #define DEBUG(x...) _PRINTVF(2, "DEBUG: " x) 87 #else /* !TRACE_DEBUG */ 88 #define DEBUG(x...) do {} while (0) 89 #endif /* TRACE_DEBUG */ 90 91 #define TRACE_TYPE(t, x...) do { if (DO_TRACE_##t) { TRACE(x); } } while (0) 92 93 #if COUNT_PAGES 94 extern uint32_t bitmask[]; 95 #if defined(__LP64__) 96 #define MARK(offset) \ 97 do { \ 98 if ((((offset) >> 12) >> 5) < 4096) \ 99 bitmask[((offset) >> 12) >> 5] |= (1 << (((offset) >> 12) & 31)); \ 100 } while (0) 101 #else 102 #define MARK(offset) \ 103 do { \ 104 bitmask[((offset) >> 12) >> 3] |= (1 << (((offset) >> 12) & 7)); \ 105 } while (0) 106 #endif 107 #else 108 #define MARK(x) do {} while (0) 109 110 #endif 111 112 #endif /* _LINKER_DEBUG_H_ */ 113
