| /* |
| * Copyright (C) 2012 The Android Open Source Project |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #include <stdio.h> |
| #include <string.h> |
| #include <stdlib.h> |
| |
| #include "dlmalloc.h" |
| #include "malloc_debug_check_mapinfo.h" |
| |
| // 6f000000-6f01e000 rwxp 00000000 00:0c 16389419 /system/lib/libcomposer.so |
| // 012345678901234567890123456789012345678901234567890123456789 |
| // 0 1 2 3 4 5 |
| |
| static mapinfo *parse_maps_line(char *line) |
| { |
| mapinfo *mi; |
| int len = strlen(line); |
| |
| if(len < 1) return 0; |
| line[--len] = 0; |
| |
| if(len < 50) return 0; |
| if(line[20] != 'x') return 0; |
| |
| mi = dlmalloc(sizeof(mapinfo) + (len - 47)); |
| if(mi == 0) return 0; |
| |
| mi->start = strtoul(line, 0, 16); |
| mi->end = strtoul(line + 9, 0, 16); |
| /* To be filled in parse_elf_info if the mapped section starts with |
| * elf_header |
| */ |
| mi->next = 0; |
| strcpy(mi->name, line + 49); |
| |
| return mi; |
| } |
| |
| __LIBC_HIDDEN__ |
| mapinfo *init_mapinfo(int pid) |
| { |
| struct mapinfo *milist = NULL; |
| char data[1024]; |
| sprintf(data, "/proc/%d/maps", pid); |
| FILE *fp = fopen(data, "r"); |
| if(fp) { |
| while(fgets(data, sizeof(data), fp)) { |
| mapinfo *mi = parse_maps_line(data); |
| if(mi) { |
| mi->next = milist; |
| milist = mi; |
| } |
| } |
| fclose(fp); |
| } |
| |
| return milist; |
| } |
| |
| __LIBC_HIDDEN__ |
| void deinit_mapinfo(mapinfo *mi) |
| { |
| mapinfo *del; |
| while(mi) { |
| del = mi; |
| mi = mi->next; |
| dlfree(del); |
| } |
| } |
| |
| /* Map a pc address to the name of the containing ELF file */ |
| __LIBC_HIDDEN__ |
| const char *map_to_name(mapinfo *mi, unsigned pc, const char* def) |
| { |
| while(mi) { |
| if((pc >= mi->start) && (pc < mi->end)){ |
| return mi->name; |
| } |
| mi = mi->next; |
| } |
| return def; |
| } |
| |
| /* Find the containing map info for the pc */ |
| __LIBC_HIDDEN__ |
| const mapinfo *pc_to_mapinfo(mapinfo *mi, unsigned pc, unsigned *rel_pc) |
| { |
| *rel_pc = pc; |
| while(mi) { |
| if((pc >= mi->start) && (pc < mi->end)){ |
| // Only calculate the relative offset for shared libraries |
| if (strstr(mi->name, ".so")) { |
| *rel_pc -= mi->start; |
| } |
| return mi; |
| } |
| mi = mi->next; |
| } |
| return NULL; |
| } |