qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
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selfmap.c (2282B)

      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 }