| /* |
| * 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 "debug_mapinfo.h" |
| |
| // 6f000000-6f01e000 rwxp 00000000 00:0c 16389419 /system/lib/libcomposer.so |
| // 012345678901234567890123456789012345678901234567890123456789 |
| // 0 1 2 3 4 5 |
| |
| static mapinfo_t* parse_maps_line(char* line) { |
| int len = strlen(line); |
| |
| if (len < 1) return 0; |
| line[--len] = 0; |
| |
| if (len < 50) return 0; |
| if (line[20] != 'x') return 0; |
| |
| mapinfo_t* mi = static_cast<mapinfo_t*>(dlmalloc(sizeof(mapinfo_t) + (len - 47))); |
| if (mi == 0) return 0; |
| |
| mi->start = strtoul(line, 0, 16); |
| mi->end = strtoul(line + 9, 0, 16); |
| mi->next = 0; |
| strcpy(mi->name, line + 49); |
| |
| return mi; |
| } |
| |
| __LIBC_HIDDEN__ mapinfo_t* mapinfo_create(pid_t pid) { |
| struct mapinfo_t* milist = NULL; |
| char data[1024]; // Used to read lines as well as to construct the filename. |
| snprintf(data, sizeof(data), "/proc/%d/maps", pid); |
| FILE* fp = fopen(data, "r"); |
| if (fp != NULL) { |
| while (fgets(data, sizeof(data), fp) != NULL) { |
| mapinfo_t* mi = parse_maps_line(data); |
| if (mi) { |
| mi->next = milist; |
| milist = mi; |
| } |
| } |
| fclose(fp); |
| } |
| return milist; |
| } |
| |
| __LIBC_HIDDEN__ void mapinfo_destroy(mapinfo_t* mi) { |
| while (mi != NULL) { |
| mapinfo_t* del = mi; |
| mi = mi->next; |
| dlfree(del); |
| } |
| } |
| |
| // Find the containing map info for the PC. |
| __LIBC_HIDDEN__ const mapinfo_t* mapinfo_find(mapinfo_t* mi, uintptr_t pc, uintptr_t* rel_pc) { |
| for (; mi != NULL; mi = mi->next) { |
| if ((pc >= mi->start) && (pc < mi->end)) { |
| *rel_pc = pc - mi->start; |
| return mi; |
| } |
| } |
| *rel_pc = pc; |
| return NULL; |
| } |