| /* |
| * Copyright (C) 2011 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #define LOG_TAG "Corkscrew" |
| //#define LOG_NDEBUG 0 |
| |
| #include <corkscrew/map_info.h> |
| |
| #include <ctype.h> |
| #include <stdio.h> |
| #include <string.h> |
| #include <limits.h> |
| #include <pthread.h> |
| #include <unistd.h> |
| #include <cutils/log.h> |
| |
| // 6f000000-6f01e000 rwxp 00000000 00:0c 16389419 /system/lib/libcomposer.so\n |
| // 012345678901234567890123456789012345678901234567890123456789 |
| // 0 1 2 3 4 5 |
| static map_info_t* parse_maps_line(const char* line) |
| { |
| unsigned long int start; |
| unsigned long int end; |
| char permissions[5]; |
| int name_pos; |
| if (sscanf(line, "%lx-%lx %4s %*x %*x:%*x %*d%n", &start, &end, |
| permissions, &name_pos) != 3) { |
| return NULL; |
| } |
| |
| while (isspace(line[name_pos])) { |
| name_pos += 1; |
| } |
| const char* name = line + name_pos; |
| size_t name_len = strlen(name); |
| if (name_len && name[name_len - 1] == '\n') { |
| name_len -= 1; |
| } |
| |
| map_info_t* mi = calloc(1, sizeof(map_info_t) + name_len + 1); |
| if (mi) { |
| mi->start = start; |
| mi->end = end; |
| mi->is_executable = strlen(permissions) == 4 && permissions[2] == 'x'; |
| mi->data = NULL; |
| memcpy(mi->name, name, name_len); |
| mi->name[name_len] = '\0'; |
| } |
| return mi; |
| } |
| |
| map_info_t* load_map_info_list(pid_t tid) { |
| char path[PATH_MAX]; |
| char line[1024]; |
| FILE* fp; |
| map_info_t* milist = NULL; |
| |
| snprintf(path, PATH_MAX, "/proc/%d/maps", tid); |
| fp = fopen(path, "r"); |
| if (fp) { |
| while(fgets(line, sizeof(line), fp)) { |
| map_info_t* mi = parse_maps_line(line); |
| if (mi) { |
| mi->next = milist; |
| milist = mi; |
| } |
| } |
| fclose(fp); |
| } |
| return milist; |
| } |
| |
| void free_map_info_list(map_info_t* milist) { |
| while (milist) { |
| map_info_t* next = milist->next; |
| free(milist); |
| milist = next; |
| } |
| } |
| |
| const map_info_t* find_map_info(const map_info_t* milist, uintptr_t addr) { |
| const map_info_t* mi = milist; |
| while (mi && !(addr >= mi->start && addr < mi->end)) { |
| mi = mi->next; |
| } |
| return mi; |
| } |
| |
| static pthread_once_t g_my_milist_once = PTHREAD_ONCE_INIT; |
| static map_info_t* g_my_milist = NULL; |
| |
| static void init_my_milist_once() { |
| g_my_milist = load_map_info_list(getpid()); |
| } |
| |
| const map_info_t* my_map_info_list() { |
| pthread_once(&g_my_milist_once, init_my_milist_once); |
| return g_my_milist; |
| } |