Ben Cheng | 25b3c04 | 2013-11-20 14:45:36 -0800 | [diff] [blame] | 1 | /* Return scope DIEs containing given DIE. |
| 2 | Copyright (C) 2005 Red Hat, Inc. |
| 3 | This file is part of Red Hat elfutils. |
| 4 | |
| 5 | Red Hat elfutils is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by the |
| 7 | Free Software Foundation; version 2 of the License. |
| 8 | |
| 9 | Red Hat elfutils is distributed in the hope that it will be useful, but |
| 10 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 12 | General Public License for more details. |
| 13 | |
| 14 | You should have received a copy of the GNU General Public License along |
| 15 | with Red Hat elfutils; if not, write to the Free Software Foundation, |
| 16 | Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. |
| 17 | |
| 18 | In addition, as a special exception, Red Hat, Inc. gives You the |
| 19 | additional right to link the code of Red Hat elfutils with code licensed |
| 20 | under any Open Source Initiative certified open source license |
| 21 | (http://www.opensource.org/licenses/index.php) which requires the |
| 22 | distribution of source code with any binary distribution and to |
| 23 | distribute linked combinations of the two. Non-GPL Code permitted under |
| 24 | this exception must only link to the code of Red Hat elfutils through |
| 25 | those well defined interfaces identified in the file named EXCEPTION |
| 26 | found in the source code files (the "Approved Interfaces"). The files |
| 27 | of Non-GPL Code may instantiate templates or use macros or inline |
| 28 | functions from the Approved Interfaces without causing the resulting |
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| 33 | exception, please contact Red Hat. You must obey the GNU General Public |
| 34 | License in all respects for all of the Red Hat elfutils code and other |
| 35 | code used in conjunction with Red Hat elfutils except the Non-GPL Code |
| 36 | covered by this exception. If you modify this file, you may extend this |
| 37 | exception to your version of the file, but you are not obligated to do |
| 38 | so. If you do not wish to provide this exception without modification, |
| 39 | you must delete this exception statement from your version and license |
| 40 | this file solely under the GPL without exception. |
| 41 | |
| 42 | Red Hat elfutils is an included package of the Open Invention Network. |
| 43 | An included package of the Open Invention Network is a package for which |
| 44 | Open Invention Network licensees cross-license their patents. No patent |
| 45 | license is granted, either expressly or impliedly, by designation as an |
| 46 | included package. Should you wish to participate in the Open Invention |
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| 48 | <http://www.openinventionnetwork.com>. */ |
| 49 | |
| 50 | #ifdef HAVE_CONFIG_H |
| 51 | # include <config.h> |
| 52 | #endif |
| 53 | #include "libdwP.h" |
| 54 | #include <assert.h> |
| 55 | #include <stdlib.h> |
| 56 | |
| 57 | static int |
| 58 | scope_visitor (unsigned int depth, struct Dwarf_Die_Chain *die, void *arg) |
| 59 | { |
| 60 | if (die->die.addr != *(void **) arg) |
| 61 | return 0; |
| 62 | |
| 63 | Dwarf_Die *scopes = malloc (depth * sizeof scopes[0]); |
| 64 | if (scopes == NULL) |
| 65 | { |
| 66 | __libdw_seterrno (DWARF_E_NOMEM); |
| 67 | return -1; |
| 68 | } |
| 69 | |
| 70 | unsigned int i = 0; |
| 71 | do |
| 72 | { |
| 73 | scopes[i++] = die->die; |
| 74 | die = die->parent; |
| 75 | } |
| 76 | while (die != NULL); |
| 77 | assert (i == depth); |
| 78 | |
| 79 | *(void **) arg = scopes; |
| 80 | return depth; |
| 81 | } |
| 82 | |
| 83 | int |
| 84 | dwarf_getscopes_die (Dwarf_Die *die, Dwarf_Die **scopes) |
| 85 | { |
| 86 | if (die == NULL) |
| 87 | return -1; |
| 88 | |
| 89 | struct Dwarf_Die_Chain cu = { .die = CUDIE (die->cu), .parent = NULL }; |
| 90 | void *info = die->addr; |
| 91 | int result = __libdw_visit_scopes (1, &cu, &scope_visitor, NULL, &info); |
| 92 | if (result > 0) |
| 93 | *scopes = info; |
| 94 | return result; |
| 95 | } |