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; 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 /* 42 * The last field may have leading spaces which we 43 * need to strip. 44 */ 45 if (g_strv_length(fields) == 6) { 46 e->path = g_strdup(g_strchug(fields[5])); 47 } 48 map_info = g_slist_prepend(map_info, e); 49 } 50 51 g_strfreev(fields); 52 } 53 g_strfreev(lines); 54 g_free(maps); 55 } 56 57 /* ensure the map data is in the same order we collected it */ 58 return g_slist_reverse(map_info); 59 } 60 61 /** 62 * free_self_maps: 63 * @info: a GSlist 64 * 65 * Free a list of MapInfo structures. 66 */ 67 static void free_info(gpointer data) 68 { 69 MapInfo *e = (MapInfo *) data; 70 g_free(e->dev); 71 g_free(e->path); 72 g_free(e); 73 } 74 75 void free_self_maps(GSList *info) 76 { 77 g_slist_free_full(info, &free_info); 78 } 79