Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 1 | /* Return scope DIEs containing PC address. |
| 2 | Copyright (C) 2005 Red Hat, Inc. |
Ulrich Drepper | 361df7d | 2006-04-04 21:38:57 +0000 | [diff] [blame] | 3 | This file is part of Red Hat elfutils. |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 4 | |
Ulrich Drepper | 361df7d | 2006-04-04 21:38:57 +0000 | [diff] [blame] | 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. |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 8 | |
Ulrich Drepper | 361df7d | 2006-04-04 21:38:57 +0000 | [diff] [blame] | 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, |
Ulrich Drepper | 1e9ef50 | 2006-04-04 22:29:06 +0000 | [diff] [blame] | 16 | Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA. |
Ulrich Drepper | 361df7d | 2006-04-04 21:38:57 +0000 | [diff] [blame] | 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 |
| 29 | work to be covered by the GNU General Public License. Only Red Hat, |
| 30 | Inc. may make changes or additions to the list of Approved Interfaces. |
| 31 | Red Hat's grant of this exception is conditioned upon your not adding |
| 32 | any new exceptions. If you wish to add a new Approved Interface or |
| 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 |
| 47 | Network licensing program, please visit www.openinventionnetwork.com |
| 48 | <http://www.openinventionnetwork.com>. */ |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 49 | |
| 50 | #ifdef HAVE_CONFIG_H |
| 51 | # include <config.h> |
| 52 | #endif |
| 53 | |
Roland McGrath | 71e15a0 | 2005-08-27 10:33:26 +0000 | [diff] [blame] | 54 | #include <assert.h> |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 55 | #include <stdlib.h> |
| 56 | #include "libdwP.h" |
| 57 | #include <dwarf.h> |
| 58 | |
| 59 | |
Roland McGrath | 71e15a0 | 2005-08-27 10:33:26 +0000 | [diff] [blame] | 60 | struct args |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 61 | { |
Roland McGrath | 71e15a0 | 2005-08-27 10:33:26 +0000 | [diff] [blame] | 62 | Dwarf_Addr pc; |
| 63 | Dwarf_Die *scopes; |
| 64 | unsigned int inlined, nscopes; |
| 65 | Dwarf_Die inlined_origin; |
| 66 | }; |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 67 | |
Roland McGrath | 71e15a0 | 2005-08-27 10:33:26 +0000 | [diff] [blame] | 68 | /* Preorder visitor: prune the traversal if this DIE does not contain PC. */ |
| 69 | static int |
| 70 | pc_match (unsigned int depth, struct Dwarf_Die_Chain *die, void *arg) |
| 71 | { |
| 72 | struct args *a = arg; |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 73 | |
Roland McGrath | 71e15a0 | 2005-08-27 10:33:26 +0000 | [diff] [blame] | 74 | if (a->scopes != NULL || INTUSE(dwarf_haspc) (&die->die, a->pc) <= 0) |
| 75 | die->prune = true; |
| 76 | else if (INTUSE (dwarf_tag) (&die->die) == DW_TAG_inlined_subroutine) |
| 77 | a->inlined = depth; |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 78 | |
Roland McGrath | 71e15a0 | 2005-08-27 10:33:26 +0000 | [diff] [blame] | 79 | return 0; |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 80 | } |
| 81 | |
Roland McGrath | 71e15a0 | 2005-08-27 10:33:26 +0000 | [diff] [blame] | 82 | /* Preorder visitor for second partial traversal after finding a |
| 83 | concrete inlined instance. */ |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 84 | static int |
Roland McGrath | 71e15a0 | 2005-08-27 10:33:26 +0000 | [diff] [blame] | 85 | origin_match (unsigned int depth, struct Dwarf_Die_Chain *die, void *arg) |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 86 | { |
Roland McGrath | 71e15a0 | 2005-08-27 10:33:26 +0000 | [diff] [blame] | 87 | struct args *a = arg; |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 88 | |
Roland McGrath | 71e15a0 | 2005-08-27 10:33:26 +0000 | [diff] [blame] | 89 | if (die->die.addr != a->inlined_origin.addr) |
| 90 | return 0; |
| 91 | |
| 92 | /* We have a winner! This is the abstract definition of the inline |
| 93 | function of which A->scopes[A->nscopes - 1] is a concrete instance. |
| 94 | */ |
| 95 | |
| 96 | unsigned int nscopes = a->nscopes + depth; |
| 97 | Dwarf_Die *scopes = realloc (a->scopes, nscopes * sizeof scopes[0]); |
| 98 | if (scopes == NULL) |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 99 | { |
Roland McGrath | 71e15a0 | 2005-08-27 10:33:26 +0000 | [diff] [blame] | 100 | free (a->scopes); |
| 101 | __libdw_seterrno (DWARF_E_NOMEM); |
| 102 | return -1; |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 103 | } |
| 104 | |
Roland McGrath | 71e15a0 | 2005-08-27 10:33:26 +0000 | [diff] [blame] | 105 | a->scopes = scopes; |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 106 | do |
| 107 | { |
Roland McGrath | 71e15a0 | 2005-08-27 10:33:26 +0000 | [diff] [blame] | 108 | die = die->parent; |
| 109 | scopes[a->nscopes++] = die->die; |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 110 | } |
Roland McGrath | 71e15a0 | 2005-08-27 10:33:26 +0000 | [diff] [blame] | 111 | while (a->nscopes < nscopes); |
| 112 | assert (die->parent == NULL); |
| 113 | return a->nscopes; |
| 114 | } |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 115 | |
Roland McGrath | 71e15a0 | 2005-08-27 10:33:26 +0000 | [diff] [blame] | 116 | /* Postorder visitor: first (innermost) call wins. */ |
| 117 | static int |
| 118 | pc_record (unsigned int depth, struct Dwarf_Die_Chain *die, void *arg) |
| 119 | { |
| 120 | struct args *a = arg; |
| 121 | |
| 122 | if (a->scopes == NULL) |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 123 | { |
Roland McGrath | 71e15a0 | 2005-08-27 10:33:26 +0000 | [diff] [blame] | 124 | if (die->prune) |
| 125 | return 0; |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 126 | |
Roland McGrath | 71e15a0 | 2005-08-27 10:33:26 +0000 | [diff] [blame] | 127 | /* We have hit the innermost DIE that contains the target PC. */ |
| 128 | |
| 129 | a->nscopes = depth + 1 - a->inlined; |
| 130 | a->scopes = malloc (a->nscopes * sizeof a->scopes[0]); |
| 131 | if (a->scopes == NULL) |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 132 | { |
| 133 | __libdw_seterrno (DWARF_E_NOMEM); |
| 134 | return -1; |
| 135 | } |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 136 | |
Roland McGrath | 71e15a0 | 2005-08-27 10:33:26 +0000 | [diff] [blame] | 137 | for (unsigned int i = 0; i < a->nscopes; ++i) |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 138 | { |
Roland McGrath | 71e15a0 | 2005-08-27 10:33:26 +0000 | [diff] [blame] | 139 | a->scopes[i] = die->die; |
| 140 | die = die->parent; |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 141 | } |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 142 | |
Roland McGrath | 71e15a0 | 2005-08-27 10:33:26 +0000 | [diff] [blame] | 143 | if (a->inlined == 0) |
| 144 | { |
| 145 | assert (die == NULL); |
| 146 | return a->nscopes; |
| 147 | } |
| 148 | |
| 149 | /* This is the concrete inlined instance itself. |
| 150 | Record its abstract_origin pointer. */ |
| 151 | Dwarf_Die *const inlinedie = &a->scopes[depth - a->inlined]; |
| 152 | |
| 153 | assert (INTUSE (dwarf_tag) (inlinedie) == DW_TAG_inlined_subroutine); |
| 154 | Dwarf_Attribute attr_mem; |
| 155 | Dwarf_Attribute *attr = INTUSE (dwarf_attr) (inlinedie, |
| 156 | DW_AT_abstract_origin, |
| 157 | &attr_mem); |
| 158 | if (INTUSE (dwarf_formref_die) (attr, &a->inlined_origin) == NULL) |
| 159 | return -1; |
| 160 | return 0; |
| 161 | } |
| 162 | |
| 163 | |
| 164 | /* We've recorded the scopes back to one that is a concrete inlined |
| 165 | instance. Now return out of the traversal back to the scope |
| 166 | containing that instance. */ |
| 167 | |
| 168 | assert (a->inlined); |
| 169 | if (depth >= a->inlined) |
| 170 | /* Not there yet. */ |
| 171 | return 0; |
| 172 | |
| 173 | /* Now we are in a scope that contains the concrete inlined instance. |
| 174 | Search it for the inline function's abstract definition. |
| 175 | If we don't find it, return to search the containing scope. |
| 176 | If we do find it, the nonzero return value will bail us out |
| 177 | of the postorder traversal. */ |
| 178 | return __libdw_visit_scopes (depth, die, &origin_match, NULL, &a); |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 179 | } |
| 180 | |
| 181 | |
| 182 | int |
| 183 | dwarf_getscopes (Dwarf_Die *cudie, Dwarf_Addr pc, Dwarf_Die **scopes) |
| 184 | { |
| 185 | if (cudie == NULL) |
| 186 | return -1; |
| 187 | |
Roland McGrath | 71e15a0 | 2005-08-27 10:33:26 +0000 | [diff] [blame] | 188 | struct Dwarf_Die_Chain cu = { .parent = NULL, .die = *cudie }; |
| 189 | struct args a = { .pc = pc }; |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 190 | |
Roland McGrath | 71e15a0 | 2005-08-27 10:33:26 +0000 | [diff] [blame] | 191 | int result = __libdw_visit_scopes (0, &cu, &pc_match, &pc_record, &a); |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 192 | |
Roland McGrath | 71e15a0 | 2005-08-27 10:33:26 +0000 | [diff] [blame] | 193 | if (result == 0 && a.scopes != NULL) |
| 194 | result = __libdw_visit_scopes (0, &cu, &origin_match, NULL, &a); |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 195 | |
Roland McGrath | 71e15a0 | 2005-08-27 10:33:26 +0000 | [diff] [blame] | 196 | if (result > 0) |
| 197 | *scopes = a.scopes; |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 198 | |
Roland McGrath | 71e15a0 | 2005-08-27 10:33:26 +0000 | [diff] [blame] | 199 | return result; |
Ulrich Drepper | b08d5a8 | 2005-07-26 05:00:05 +0000 | [diff] [blame] | 200 | } |