plugins/lttng-utils/utils.c

   1 /*
   2  * Babeltrace - Debug info utilities
   3  *
   4  * Copyright (c) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  19  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  */
  24
  25 #include "utils.h"
  26
  27 BT_HIDDEN
  28 const char *get_filename_from_path(const char *path)
  29 {
  30         size_t i = strlen(path);
  31
  32         if (i == 0) {
  33                 goto end;
  34         }
  35
  36         if (path[i - 1] == '/') {
  37                 /*
  38                  * Path ends with a trailing slash, no filename to return.
  39                  * Return the original path.
  40                  */
  41                 goto end;
  42         }
  43
  44         while (i-- > 0) {
  45                 if (path[i] == '/') {
  46                         path = &path[i + 1];
  47                         goto end;
  48                 }
  49         }
  50 end:
  51         return path;
  52 }
  53
  54 BT_HIDDEN
  55 bt_bool is_event_common_ctx_dbg_info_compatible(const bt_field_class *in_field_class,
  56                 const char *debug_info_field_class_name)
  57 {
  58         const bt_field_class_structure_member *member;
  59         const bt_field_class *ip_fc, *vpid_fc;
  60         bt_bool match = BT_FALSE;
  61
  62         /*
  63          * If the debug info field is already present in the event common
  64          * context. Do not try to add it.
  65          */
  66         member =
  67                 bt_field_class_structure_borrow_member_by_name_const(
  68                         in_field_class, debug_info_field_class_name);
  69         if (member) {
  70                 goto end;
  71         }
  72
  73         /*
  74          * Verify that the ip and vpid field are present and of the right field
  75          * class.
  76          */
  77         member = bt_field_class_structure_borrow_member_by_name_const(
  78                         in_field_class, IP_FIELD_NAME);
  79         if (!member) {
  80                 goto end;
  81         }
  82
  83         ip_fc = bt_field_class_structure_member_borrow_field_class_const(
  84                 member);
  85         if (bt_field_class_get_type(ip_fc) !=
  86                         BT_FIELD_CLASS_TYPE_UNSIGNED_INTEGER) {
  87                 match = BT_FALSE;
  88                 goto end;
  89         }
  90
  91         if (bt_field_class_integer_get_field_value_range(ip_fc) != 64) {
  92                 goto end;
  93         }
  94
  95         member = bt_field_class_structure_borrow_member_by_name_const(
  96                         in_field_class, VPID_FIELD_NAME);
  97         if (!member) {
  98                 goto end;
  99         }
 100
 101         vpid_fc = bt_field_class_structure_member_borrow_field_class_const(
 102                 member);
 103
 104         if (bt_field_class_get_type(vpid_fc) !=
 105                         BT_FIELD_CLASS_TYPE_SIGNED_INTEGER) {
 106                 goto end;
 107         }
 108
 109         if (bt_field_class_integer_get_field_value_range(vpid_fc) != 32) {
 110                 goto end;
 111         }
 112
 113         match = BT_TRUE;
 114
 115 end:
 116         return match;
 117 }