1e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev/* 2e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev * Copyright (C) 2012 The Android Open Source Project 3e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev * All rights reserved. 4e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev * 5e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev * Redistribution and use in source and binary forms, with or without 6e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev * modification, are permitted provided that the following conditions 7e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev * are met: 8e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev * * Redistributions of source code must retain the above copyright 9e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev * notice, this list of conditions and the following disclaimer. 10e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev * * Redistributions in binary form must reproduce the above copyright 11e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev * notice, this list of conditions and the following disclaimer in 12e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev * the documentation and/or other materials provided with the 13e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev * distribution. 14e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev * 15e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev * SUCH DAMAGE. 27e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev */ 28e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev 29e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev#include <stdio.h> 30e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev#include <string.h> 31e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev#include <stdlib.h> 32e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev 33e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev#include "dlmalloc.h" 34e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev#include "malloc_debug_check_mapinfo.h" 35e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev 36e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev// 6f000000-6f01e000 rwxp 00000000 00:0c 16389419 /system/lib/libcomposer.so 37e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev// 012345678901234567890123456789012345678901234567890123456789 38e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev// 0 1 2 3 4 5 39e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev 40c4d1fecc105063e68a5090a6900b63d1b9a24287Elliott Hughesstatic mapinfo* parse_maps_line(char* line) { 41e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev int len = strlen(line); 42e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev 43c4d1fecc105063e68a5090a6900b63d1b9a24287Elliott Hughes if (len < 1) return 0; 44e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev line[--len] = 0; 45e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev 46c4d1fecc105063e68a5090a6900b63d1b9a24287Elliott Hughes if (len < 50) return 0; 47c4d1fecc105063e68a5090a6900b63d1b9a24287Elliott Hughes if (line[20] != 'x') return 0; 48e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev 49c4d1fecc105063e68a5090a6900b63d1b9a24287Elliott Hughes mapinfo* mi = static_cast<mapinfo*>(dlmalloc(sizeof(mapinfo) + (len - 47))); 50c4d1fecc105063e68a5090a6900b63d1b9a24287Elliott Hughes if (mi == 0) return 0; 51e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev 52e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev mi->start = strtoul(line, 0, 16); 53e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev mi->end = strtoul(line + 9, 0, 16); 54e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev /* To be filled in parse_elf_info if the mapped section starts with 55e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev * elf_header 56e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev */ 57e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev mi->next = 0; 58e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev strcpy(mi->name, line + 49); 59e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev 60e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev return mi; 61e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev} 62e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev 63e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev__LIBC_HIDDEN__ 64c4d1fecc105063e68a5090a6900b63d1b9a24287Elliott Hughesmapinfo *init_mapinfo(int pid) { 65e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev struct mapinfo *milist = NULL; 66c4d1fecc105063e68a5090a6900b63d1b9a24287Elliott Hughes char data[1024]; // Used to read lines as well as to construct the filename. 67c4d1fecc105063e68a5090a6900b63d1b9a24287Elliott Hughes snprintf(data, sizeof(data), "/proc/%d/maps", pid); 68e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev FILE *fp = fopen(data, "r"); 69c4d1fecc105063e68a5090a6900b63d1b9a24287Elliott Hughes if (fp) { 70c4d1fecc105063e68a5090a6900b63d1b9a24287Elliott Hughes while (fgets(data, sizeof(data), fp)) { 71e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev mapinfo *mi = parse_maps_line(data); 72c4d1fecc105063e68a5090a6900b63d1b9a24287Elliott Hughes if (mi) { 73e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev mi->next = milist; 74e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev milist = mi; 75e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev } 76e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev } 77e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev fclose(fp); 78e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev } 79e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev 80e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev return milist; 81e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev} 82e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev 83e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev__LIBC_HIDDEN__ 84c4d1fecc105063e68a5090a6900b63d1b9a24287Elliott Hughesvoid deinit_mapinfo(mapinfo *mi) { 85c4d1fecc105063e68a5090a6900b63d1b9a24287Elliott Hughes mapinfo *del; 86c4d1fecc105063e68a5090a6900b63d1b9a24287Elliott Hughes while (mi) { 87c4d1fecc105063e68a5090a6900b63d1b9a24287Elliott Hughes del = mi; 88c4d1fecc105063e68a5090a6900b63d1b9a24287Elliott Hughes mi = mi->next; 89c4d1fecc105063e68a5090a6900b63d1b9a24287Elliott Hughes dlfree(del); 90c4d1fecc105063e68a5090a6900b63d1b9a24287Elliott Hughes } 91e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev} 92e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev 93e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev/* Map a pc address to the name of the containing ELF file */ 94e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev__LIBC_HIDDEN__ 95c4d1fecc105063e68a5090a6900b63d1b9a24287Elliott Hughesconst char *map_to_name(mapinfo *mi, unsigned pc, const char* def) { 96c4d1fecc105063e68a5090a6900b63d1b9a24287Elliott Hughes while (mi) { 97c4d1fecc105063e68a5090a6900b63d1b9a24287Elliott Hughes if ((pc >= mi->start) && (pc < mi->end)) { 98e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev return mi->name; 99e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev } 100e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev mi = mi->next; 101e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev } 102e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev return def; 103e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev} 104e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev 105e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev/* Find the containing map info for the pc */ 106e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev__LIBC_HIDDEN__ 107c4d1fecc105063e68a5090a6900b63d1b9a24287Elliott Hughesconst mapinfo *pc_to_mapinfo(mapinfo *mi, unsigned pc, unsigned *rel_pc) { 108e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev *rel_pc = pc; 109c4d1fecc105063e68a5090a6900b63d1b9a24287Elliott Hughes while (mi) { 110c4d1fecc105063e68a5090a6900b63d1b9a24287Elliott Hughes if ((pc >= mi->start) && (pc < mi->end)) { 111e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev // Only calculate the relative offset for shared libraries 112e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev if (strstr(mi->name, ".so")) { 113e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev *rel_pc -= mi->start; 114e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev } 115e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev return mi; 116e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev } 117e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev mi = mi->next; 118e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev } 119e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev return NULL; 120e1dd3c287ba836281de0197670018bd9bbfbd62bIliyan Malchev} 121