Alex Bennée | 01ef6b9 | 2020-04-03 20:11:46 +0100 | [diff] [blame] | 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); |
Richard Henderson | 53645dc | 2021-07-12 18:39:06 +0000 | [diff] [blame] | 26 | int errors = 0; |
Alex Bennée | 01ef6b9 | 2020-04-03 20:11:46 +0100 | [diff] [blame] | 27 | const char *end; |
| 28 | |
Richard Henderson | 53645dc | 2021-07-12 18:39:06 +0000 | [diff] [blame] | 29 | errors |= qemu_strtoul(fields[0], &end, 16, &e->start); |
| 30 | errors |= qemu_strtoul(end + 1, NULL, 16, &e->end); |
Alex Bennée | 01ef6b9 | 2020-04-03 20:11:46 +0100 | [diff] [blame] | 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 | |
Richard Henderson | 53645dc | 2021-07-12 18:39:06 +0000 | [diff] [blame] | 37 | errors |= qemu_strtoul(fields[2], NULL, 16, &e->offset); |
Alex Bennée | 01ef6b9 | 2020-04-03 20:11:46 +0100 | [diff] [blame] | 38 | e->dev = g_strdup(fields[3]); |
Richard Henderson | 53645dc | 2021-07-12 18:39:06 +0000 | [diff] [blame] | 39 | errors |= qemu_strtou64(fields[4], NULL, 10, &e->inode); |
Alex Bennée | 01ef6b9 | 2020-04-03 20:11:46 +0100 | [diff] [blame] | 40 | |
Richard Henderson | 53645dc | 2021-07-12 18:39:06 +0000 | [diff] [blame] | 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); |
Alex Bennée | 01ef6b9 | 2020-04-03 20:11:46 +0100 | [diff] [blame] | 53 | } |
Alex Bennée | 01ef6b9 | 2020-04-03 20:11:46 +0100 | [diff] [blame] | 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 | } |