1 /* Maintenance of module list in libdwfl.
2 Copyright (C) 2005, 2006, 2007, 2008 Red Hat, Inc.
3 This file is part of Red Hat elfutils.
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.
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.
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.
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.
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>. */
55 free_cu (struct dwfl_cu *cu)
57 if (cu->lines != NULL)
63 nofree (void *arg __attribute__ ((unused)))
68 free_file (struct dwfl_file *file)
72 /* Close the fd only on the last reference. */
73 if (file->elf != NULL && elf_end (file->elf) == 0 && file->fd != -1)
79 __libdwfl_module_free (Dwfl_Module *mod)
81 if (mod->lazy_cu_root != NULL)
82 tdestroy (mod->lazy_cu_root, nofree);
84 if (mod->aranges != NULL)
89 for (size_t i = 0; i < mod->ncu; ++i)
95 INTUSE(dwarf_end) (mod->dw);
98 ebl_closebackend (mod->ebl);
100 if (mod->debug.elf != mod->main.elf)
101 free_file (&mod->debug);
102 free_file (&mod->main);
104 if (mod->build_id_bits != NULL)
105 free (mod->build_id_bits);
112 dwfl_report_begin_add (Dwfl *dwfl __attribute__ ((unused)))
114 /* The lookup table will be cleared on demand, there is nothing we need
117 INTDEF (dwfl_report_begin_add)
120 dwfl_report_begin (Dwfl *dwfl)
122 /* Clear the segment lookup table. */
123 dwfl->lookup_elts = 0;
125 for (Dwfl_Module *m = dwfl->modulelist; m != NULL; m = m->next)
128 dwfl->offline_next_address = OFFLINE_REDZONE;
130 INTDEF (dwfl_report_begin)
132 /* Report that a module called NAME spans addresses [START, END).
133 Returns the module handle, either existing or newly allocated,
134 or returns a null pointer for an allocation error. */
136 dwfl_report_module (Dwfl *dwfl, const char *name,
137 GElf_Addr start, GElf_Addr end)
139 Dwfl_Module **tailp = &dwfl->modulelist, **prevp = tailp;
141 inline Dwfl_Module *use (Dwfl_Module *mod)
146 if (unlikely (dwfl->lookup_module != NULL))
148 free (dwfl->lookup_module);
149 dwfl->lookup_module = NULL;
155 for (Dwfl_Module *m = *prevp; m != NULL; m = *(prevp = &m->next))
157 if (m->low_addr == start && m->high_addr == end
158 && !strcmp (m->name, name))
160 /* This module is still here. Move it to the place in the list
161 after the last module already reported. */
171 Dwfl_Module *mod = calloc (1, sizeof *mod);
175 mod->name = strdup (name);
176 if (mod->name == NULL)
180 __libdwfl_seterrno (DWFL_E_NOMEM);
184 mod->low_addr = start;
185 mod->high_addr = end;
190 INTDEF (dwfl_report_module)
193 /* Finish reporting the current set of modules to the library.
194 If REMOVED is not null, it's called for each module that
195 existed before but was not included in the current report.
196 Returns a nonzero return value from the callback.
197 DWFL cannot be used until this function has returned zero. */
199 dwfl_report_end (Dwfl *dwfl,
200 int (*removed) (Dwfl_Module *, void *,
201 const char *, Dwarf_Addr,
205 Dwfl_Module **tailp = &dwfl->modulelist;
206 while (*tailp != NULL)
208 Dwfl_Module *m = *tailp;
209 if (m->gc && removed != NULL)
211 int result = (*removed) (MODCB_ARGS (m), arg);
218 __libdwfl_module_free (m);
226 INTDEF (dwfl_report_end)