1 /* Maintenance of module list in libdwfl.
2 Copyright (C) 2005, 2006, 2007 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)
71 if (file->elf != NULL)
81 __libdwfl_module_free (Dwfl_Module *mod)
83 if (mod->lazy_cu_root != NULL)
84 tdestroy (mod->lazy_cu_root, nofree);
86 if (mod->aranges != NULL)
91 for (size_t i = 0; i < mod->ncu; ++i)
97 INTUSE(dwarf_end) (mod->dw);
100 ebl_closebackend (mod->ebl);
102 if (mod->debug.elf != mod->main.elf)
103 free_file (&mod->debug);
104 free_file (&mod->main);
111 dwfl_report_begin_add (Dwfl *dwfl)
113 if (dwfl->modules != NULL)
114 free (dwfl->modules);
115 dwfl->modules = NULL;
118 INTDEF (dwfl_report_begin_add)
121 dwfl_report_begin (Dwfl *dwfl)
123 INTUSE(dwfl_report_begin_add) (dwfl);
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;
140 for (Dwfl_Module *m = *prevp; m != NULL; m = *(prevp = &m->next))
142 if (m->low_addr == start && m->high_addr == end
143 && !strcmp (m->name, name))
145 /* This module is still here. Move it to the place in the list
146 after the last module already reported. */
159 Dwfl_Module *mod = calloc (1, sizeof *mod);
163 mod->name = strdup (name);
164 if (mod->name == NULL)
168 __libdwfl_seterrno (DWFL_E_NOMEM);
172 mod->low_addr = start;
173 mod->high_addr = end;
182 INTDEF (dwfl_report_module)
186 compare_modules (const void *a, const void *b)
188 Dwfl_Module *const *p1 = a, *const *p2 = b;
189 const Dwfl_Module *m1 = *p1, *m2 = *p2;
195 /* No signed difference calculation is correct here, since the
196 terms are unsigned and could be more than INT64_MAX apart. */
197 if (m1->low_addr < m2->low_addr)
199 if (m1->low_addr > m2->low_addr)
205 /* Finish reporting the current set of modules to the library.
206 If REMOVED is not null, it's called for each module that
207 existed before but was not included in the current report.
208 Returns a nonzero return value from the callback.
209 DWFL cannot be used until this function has returned zero. */
211 dwfl_report_end (Dwfl *dwfl,
212 int (*removed) (Dwfl_Module *, void *,
213 const char *, Dwarf_Addr,
217 assert (dwfl->modules == NULL);
219 Dwfl_Module **tailp = &dwfl->modulelist;
220 while (*tailp != NULL)
222 Dwfl_Module *m = *tailp;
223 if (m->gc && removed != NULL)
225 int result = (*removed) (MODCB_ARGS (m), arg);
232 __libdwfl_module_free (m);
238 dwfl->modules = malloc (dwfl->nmodules * sizeof dwfl->modules[0]);
239 if (dwfl->modules == NULL && dwfl->nmodules != 0)
243 for (Dwfl_Module *m = dwfl->modulelist; m != NULL; m = m->next)
246 dwfl->modules[i++] = m;
248 assert (i == dwfl->nmodules);
250 qsort (dwfl->modules, dwfl->nmodules, sizeof dwfl->modules[0],
255 INTDEF (dwfl_report_end)