1 /* 2 * Utility function to get QEMU's own process map 3 * 4 * Copyright (c) 2020 Linaro Ltd 5 * 6 * SPDX-License-Identifier: GPL-2.0-or-later 7 */ 8 9 #include "qemu/osdep.h" 10 #include "qemu/cutils.h" 11 #include "qemu/selfmap.h" 12 13 GSList *read_self_maps(void) 14 { 15 gchar *maps; 16 GSList *map_info = NULL; 17 18 if (g_file_get_contents("/proc/self/maps", &maps, NULL, NULL)) { 19 gchar **lines = g_strsplit(maps, "\n", 0); 20 int i, entries = g_strv_length(lines); 21 22 for (i = 0; i < entries; i++) { 23 gchar **fields = g_strsplit(lines[i], " ", 6); 24 if (g_strv_length(fields) > 4) { 25 MapInfo *e = g_new0(MapInfo, 1); 26 int errors = 0; 27 const char *end; 28 29 errors |= qemu_strtoul(fields[0], &end, 16, &e->start); 30 errors |= qemu_strtoul(end + 1, NULL, 16, &e->end); 31 32 e->is_read = fields[1][0] == 'r'; 33 e->is_write = fields[1][1] == 'w'; 34 e->is_exec = fields[1][2] == 'x'; 35 e->is_priv = fields[1][3] == 'p'; 36 37 errors |= qemu_strtoul(fields[2], NULL, 16, &e->offset); 38 e->dev = g_strdup(fields[3]); 39 errors |= qemu_strtou64(fields[4], NULL, 10, &e->inode); 40 41 if (!errors) { 42 /* 43 * The last field may have leading spaces which we 44 * need to strip. 45 */ 46 if (g_strv_length(fields) == 6) { 47 e->path = g_strdup(g_strchug(fields[5])); 48 } 49 map_info = g_slist_prepend(map_info, e); 50 } else { 51 g_free(e->dev); 52 g_free(e); 53 } 54 } 55 56 g_strfreev(fields); 57 } 58 g_strfreev(lines); 59 g_free(maps); 60 } 61 62 /* ensure the map data is in the same order we collected it */ 63 return g_slist_reverse(map_info); 64 } 65 66 /** 67 * free_self_maps: 68 * @info: a GSlist 69 * 70 * Free a list of MapInfo structures. 71 */ 72 static void free_info(gpointer data) 73 { 74 MapInfo *e = (MapInfo *) data; 75 g_free(e->dev); 76 g_free(e->path); 77 g_free(e); 78 } 79 80 void free_self_maps(GSList *info) 81 { 82 g_slist_free_full(info, &free_info); 83 } 84