2 Copyright (C) 2009 Paul Davis
3 From an idea by Carl Hetherington.
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #include "libpbd-config.h"
32 #include <glibmm/threads.h>
33 #include <boost/shared_ptr.hpp>
35 #include "pbd/stacktrace.h"
36 #include "pbd/boost_debug.h"
41 std::ostream& print (std::ostream& str) const;
48 std::ostream& operator<< (std::ostream& str, const Backtrace& bt) { return bt.print (str); }
50 Backtrace::Backtrace()
53 size = ::backtrace (trace, 200);
58 Backtrace::print (std::ostream& str) const
65 strings = ::backtrace_symbols (trace, size);
68 for (i = 3; i < 5+18 && i < size; i++) {
69 str << strings[i] << std::endl;
83 BTPair (Backtrace* bt) : ref (bt), rel (0) {}
87 std::ostream& operator<<(std::ostream& str, const BTPair& btp) {
88 str << "*********************************************\n";
89 if (btp.ref) str << *btp.ref << std::endl;
91 if (btp.rel) str << *btp.rel << std::endl;
96 Backtrace* constructor;
97 Backtrace* destructor;
99 SPDebug (Backtrace* c) : constructor (c), destructor (0) {}
106 std::ostream& operator<< (std::ostream& str, const SPDebug& spd)
108 str << "Constructor :" << std::endl;
109 if (spd.constructor) {
110 str << *spd.constructor << std::endl;
116 typedef std::multimap<volatile void const*,SPDebug*> PointerMap;
117 typedef std::map<volatile void const*,const char*> IPointerMap;
121 static PointerMap* _sptrs;
125 _sptrs = new PointerMap;
130 static IPointerMap* _interesting_pointers;
131 IPointerMap& interesting_pointers()
133 if (_interesting_pointers == 0) {
134 _interesting_pointers = new IPointerMap;
136 return *_interesting_pointers;
139 static Glib::Threads::Mutex* _the_lock;
140 static Glib::Threads::Mutex& the_lock()
142 if (_the_lock == 0) {
143 _the_lock = new Glib::Threads::Mutex;
150 is_interesting_object (volatile void const* ptr)
156 return interesting_pointers().find (ptr) != interesting_pointers().end();
159 /* ------------------------------- */
161 static bool debug_out = false;
164 boost_debug_shared_ptr_show_live_debugging (bool yn)
170 boost_debug_shared_ptr_mark_interesting (void* ptr, const char* type)
172 Glib::Threads::Mutex::Lock guard (the_lock());
173 pair<void*,const char*> newpair (ptr, type);
174 interesting_pointers().insert (newpair);
176 cerr << "Interesting object @ " << ptr << " of type " << type << endl;
181 boost_debug_shared_ptr_operator_equals (void const *sp, void const *old_obj, int old_use_count, void const *obj, int new_use_count)
183 if (old_obj == 0 && obj == 0) {
187 Glib::Threads::Mutex::Lock guard (the_lock());
189 if (is_interesting_object (old_obj) || is_interesting_object (obj)) {
191 cerr << "ASSIGN SWAPS " << old_obj << " & " << obj << endl;
195 if (is_interesting_object (old_obj)) {
197 cerr << "\tlost old sp @ " << sp << " for " << old_obj << " UC = " << old_use_count << " now for " << obj << " UC = " << new_use_count
198 << " (total sp's = " << sptrs().size() << ')' << endl;
200 PointerMap::iterator x = sptrs().find (sp);
202 if (x != sptrs().end()) {
205 cerr << "\tRemoved (by assignment) sp for " << old_obj << " @ " << sp << " UC = " << old_use_count << " (total sp's = " << sptrs().size() << ')' << endl;
210 if (is_interesting_object (obj)) {
212 pair<void const*, SPDebug*> newpair;
215 newpair.second = new SPDebug (new Backtrace());
217 sptrs().insert (newpair);
220 cerr << "assignment created sp for " << obj << " @ " << sp << " used to point to " << old_obj << " UC = " << old_use_count
221 << " UC = " << new_use_count
222 << " (total sp's = " << sptrs().size() << ')' << endl;
223 cerr << *newpair.second << endl;
229 boost_debug_shared_ptr_reset (void const *sp, void const *old_obj, int old_use_count, void const *obj, int new_use_count)
231 if (old_obj == 0 && obj == 0) {
235 Glib::Threads::Mutex::Lock guard (the_lock());
237 if (is_interesting_object (old_obj) || is_interesting_object (obj)) {
239 cerr << "RESET SWAPS " << old_obj << " & " << obj << endl;
243 if (is_interesting_object (old_obj)) {
245 cerr << "\tlost old sp @ " << sp << " for " << old_obj << " UC = " << old_use_count << " now for " << obj << " UC = " << new_use_count
246 << " (total sp's = " << sptrs().size() << ')' << endl;
248 PointerMap::iterator x = sptrs().find (sp);
250 if (x != sptrs().end()) {
253 cerr << "\tRemoved (by reset) sp for " << old_obj << " @ " << sp << " UC = " << old_use_count << " (total sp's = " << sptrs().size() << ')' << endl;
258 if (is_interesting_object (obj)) {
260 pair<void const*, SPDebug*> newpair;
263 newpair.second = new SPDebug (new Backtrace());
265 sptrs().insert (newpair);
268 cerr << "reset created sp for " << obj << " @ " << sp << " used to point to " << old_obj << " UC = " << old_use_count
269 << " UC = " << new_use_count
270 << " (total sp's = " << sptrs().size() << ')' << endl;
271 cerr << *newpair.second << endl;
277 boost_debug_shared_ptr_destructor (void const *sp, volatile void const *obj, int use_count)
279 Glib::Threads::Mutex::Lock guard (the_lock());
280 PointerMap::iterator x = sptrs().find (sp);
282 if (x != sptrs().end()) {
285 cerr << "Removed sp for " << obj << " @ " << sp << " UC = " << use_count << " (total sp's = " << sptrs().size() << ')' << endl;
291 boost_debug_shared_ptr_constructor (void const *sp, volatile void const *obj, int use_count)
293 if (is_interesting_object (obj)) {
294 Glib::Threads::Mutex::Lock guard (the_lock());
295 pair<void const*, SPDebug*> newpair;
298 newpair.second = new SPDebug (new Backtrace());
300 sptrs().insert (newpair);
302 cerr << "Stored constructor for " << obj << " @ " << sp << " UC = " << use_count << " (total sp's = " << sptrs().size() << ')' << endl;
303 cerr << *newpair.second << endl;
309 boost_debug_count_ptrs ()
311 Glib::Threads::Mutex::Lock guard (the_lock());
312 // cerr << "Tracking " << interesting_pointers().size() << " interesting objects with " << sptrs().size () << " shared ptrs\n";
316 boost_debug_list_ptrs ()
318 Glib::Threads::Mutex::Lock guard (the_lock());
320 if (sptrs().empty()) {
321 cerr << "There are no dangling shared ptrs\n";
323 for (PointerMap::iterator x = sptrs().begin(); x != sptrs().end(); ++x) {
324 cerr << "Shared ptr @ " << x->first << " history: "
333 void sp_scalar_constructor_hook( void *, std::size_t, void *)
337 void sp_scalar_destructor_hook( void *, std::size_t, void *)
341 void sp_counter_ref_hook (void* /*pn*/, long /* use count */)
345 void sp_counter_release_hook (void* /*pn*/, long /*use_count*/)
349 void sp_array_constructor_hook(void *)
353 void sp_array_destructor_hook(void *)
357 void sp_scalar_constructor_hook(void *)
361 void sp_scalar_destructor_hook(void *)