365 lines
8.4 KiB
C++
365 lines
8.4 KiB
C++
/*
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* Copyright (C) 2009-2018 Paul Davis <paul@linuxaudiosystems.com>
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* Copyright (C) 2015-2019 Robin Gareus <robin@gareus.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "libpbd-config.h"
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#ifdef HAVE_EXECINFO
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#include <execinfo.h>
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#endif
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#include <stdlib.h>
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#include <iostream>
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#include <map>
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#include <set>
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#include <vector>
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#include <glibmm/threads.h>
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#include <boost/shared_ptr.hpp>
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#include "pbd/stacktrace.h"
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#include "pbd/boost_debug.h"
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class Backtrace {
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public:
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Backtrace ();
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std::ostream& print (std::ostream& str) const;
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private:
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void* trace[200];
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size_t size;
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};
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std::ostream& operator<< (std::ostream& str, const Backtrace& bt) { return bt.print (str); }
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Backtrace::Backtrace()
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{
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#ifdef HAVE_EXECINFO
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size = ::backtrace (trace, 200);
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#endif
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}
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std::ostream&
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Backtrace::print (std::ostream& str) const
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{
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char **strings = 0;
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size_t i;
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if (size) {
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#ifdef HAVE_EXECINFO
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strings = ::backtrace_symbols (trace, size);
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#endif
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if (strings) {
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for (i = 3; i < 5+18 && i < size; i++) {
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str << strings[i] << std::endl;
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}
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free (strings);
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}
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}
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return str;
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}
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struct BTPair {
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Backtrace* ref;
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Backtrace* rel;
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BTPair (Backtrace* bt) : ref (bt), rel (0) {}
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~BTPair () { }
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};
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std::ostream& operator<<(std::ostream& str, const BTPair& btp) {
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str << "*********************************************\n";
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if (btp.ref) str << *btp.ref << std::endl;
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str << "Rel:\n";
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if (btp.rel) str << *btp.rel << std::endl;
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return str;
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}
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struct SPDebug {
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Backtrace* constructor;
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Backtrace* destructor;
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SPDebug (Backtrace* c) : constructor (c), destructor (0) {}
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~SPDebug () {
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delete constructor;
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delete destructor;
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}
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};
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std::ostream& operator<< (std::ostream& str, const SPDebug& spd)
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{
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str << "Constructor :" << std::endl;
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if (spd.constructor) {
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str << *spd.constructor << std::endl;
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}
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return str;
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}
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typedef std::multimap<volatile void const*,SPDebug*> PointerMap;
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typedef std::map<volatile void const*,const char*> IPointerMap;
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using namespace std;
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static PointerMap* _sptrs;
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PointerMap& sptrs()
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{
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if (_sptrs == 0) {
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_sptrs = new PointerMap;
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}
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return *_sptrs;
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}
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static IPointerMap* _interesting_pointers;
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IPointerMap& interesting_pointers()
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{
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if (_interesting_pointers == 0) {
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_interesting_pointers = new IPointerMap;
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}
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return *_interesting_pointers;
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}
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static Glib::Threads::Mutex* _the_lock;
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static Glib::Threads::Mutex& the_lock()
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{
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if (_the_lock == 0) {
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_the_lock = new Glib::Threads::Mutex;
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}
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return *_the_lock;
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}
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static bool
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is_interesting_object (volatile void const* ptr)
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{
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if (ptr == 0) {
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return false;
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}
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return interesting_pointers().find (ptr) != interesting_pointers().end();
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}
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/* ------------------------------- */
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static bool debug_out = false;
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void
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boost_debug_shared_ptr_show_live_debugging (bool yn)
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{
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debug_out = yn;
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}
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void
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boost_debug_shared_ptr_mark_interesting (void* ptr, const char* type)
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{
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Glib::Threads::Mutex::Lock guard (the_lock());
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pair<void*,const char*> newpair (ptr, type);
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interesting_pointers().insert (newpair);
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if (debug_out) {
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cerr << "Interesting object @ " << ptr << " of type " << type << endl;
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}
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}
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void
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boost_debug_shared_ptr_operator_equals (void const *sp, void const *old_obj, int old_use_count, void const *obj, int new_use_count)
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{
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if (old_obj == 0 && obj == 0) {
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return;
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}
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Glib::Threads::Mutex::Lock guard (the_lock());
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if (is_interesting_object (old_obj) || is_interesting_object (obj)) {
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if (debug_out) {
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cerr << "ASSIGN SWAPS " << old_obj << " & " << obj << endl;
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}
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}
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if (is_interesting_object (old_obj)) {
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if (debug_out) {
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cerr << "\tlost old sp @ " << sp << " for " << old_obj << " UC = " << old_use_count << " now for " << obj << " UC = " << new_use_count
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<< " (total sp's = " << sptrs().size() << ')' << endl;
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}
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PointerMap::iterator x = sptrs().find (sp);
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if (x != sptrs().end()) {
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sptrs().erase (x);
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if (debug_out) {
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cerr << "\tRemoved (by assignment) sp for " << old_obj << " @ " << sp << " UC = " << old_use_count << " (total sp's = " << sptrs().size() << ')' << endl;
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}
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}
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}
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if (is_interesting_object (obj)) {
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pair<void const*, SPDebug*> newpair;
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newpair.first = sp;
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newpair.second = new SPDebug (new Backtrace());
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sptrs().insert (newpair);
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if (debug_out) {
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cerr << "assignment created sp for " << obj << " @ " << sp << " used to point to " << old_obj << " UC = " << old_use_count
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<< " UC = " << new_use_count
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<< " (total sp's = " << sptrs().size() << ')' << endl;
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cerr << *newpair.second << endl;
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}
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}
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}
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void
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boost_debug_shared_ptr_reset (void const *sp, void const *old_obj, int old_use_count, void const *obj, int new_use_count)
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{
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if (old_obj == 0 && obj == 0) {
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return;
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}
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Glib::Threads::Mutex::Lock guard (the_lock());
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if (is_interesting_object (old_obj) || is_interesting_object (obj)) {
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if (debug_out) {
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cerr << "RESET SWAPS " << old_obj << " & " << obj << endl;
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}
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}
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if (is_interesting_object (old_obj)) {
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if (debug_out) {
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cerr << "\tlost old sp @ " << sp << " for " << old_obj << " UC = " << old_use_count << " now for " << obj << " UC = " << new_use_count
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<< " (total sp's = " << sptrs().size() << ')' << endl;
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}
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PointerMap::iterator x = sptrs().find (sp);
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if (x != sptrs().end()) {
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sptrs().erase (x);
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if (debug_out) {
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cerr << "\tRemoved (by reset) sp for " << old_obj << " @ " << sp << " UC = " << old_use_count << " (total sp's = " << sptrs().size() << ')' << endl;
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}
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}
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}
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if (is_interesting_object (obj)) {
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pair<void const*, SPDebug*> newpair;
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newpair.first = sp;
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newpair.second = new SPDebug (new Backtrace());
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sptrs().insert (newpair);
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if (debug_out) {
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cerr << "reset created sp for " << obj << " @ " << sp << " used to point to " << old_obj << " UC = " << old_use_count
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<< " UC = " << new_use_count
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<< " (total sp's = " << sptrs().size() << ')' << endl;
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cerr << *newpair.second << endl;
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}
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}
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}
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void
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boost_debug_shared_ptr_destructor (void const *sp, volatile void const *obj, int use_count)
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{
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Glib::Threads::Mutex::Lock guard (the_lock());
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PointerMap::iterator x = sptrs().find (sp);
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if (x != sptrs().end()) {
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sptrs().erase (x);
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if (debug_out) {
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cerr << "Removed sp for " << obj << " @ " << sp << " UC = " << use_count << " (total sp's = " << sptrs().size() << ')' << endl;
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}
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}
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}
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void
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boost_debug_shared_ptr_constructor (void const *sp, volatile void const *obj, int use_count)
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{
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if (is_interesting_object (obj)) {
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Glib::Threads::Mutex::Lock guard (the_lock());
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pair<void const*, SPDebug*> newpair;
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newpair.first = sp;
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newpair.second = new SPDebug (new Backtrace());
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sptrs().insert (newpair);
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if (debug_out) {
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cerr << "Stored constructor for " << obj << " @ " << sp << " UC = " << use_count << " (total sp's = " << sptrs().size() << ')' << endl;
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cerr << *newpair.second << endl;
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}
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}
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}
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void
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boost_debug_count_ptrs ()
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{
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Glib::Threads::Mutex::Lock guard (the_lock());
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// cerr << "Tracking " << interesting_pointers().size() << " interesting objects with " << sptrs().size () << " shared ptrs\n";
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}
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void
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boost_debug_list_ptrs ()
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{
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Glib::Threads::Mutex::Lock guard (the_lock());
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if (sptrs().empty()) {
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cerr << "There are no dangling shared ptrs\n";
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} else {
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for (PointerMap::iterator x = sptrs().begin(); x != sptrs().end(); ++x) {
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cerr << "Shared ptr @ " << x->first << " history: "
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<< *x->second
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<< endl;
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}
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}
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}
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namespace boost {
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void sp_scalar_constructor_hook( void *, std::size_t, void *)
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{
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}
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void sp_scalar_destructor_hook( void *, std::size_t, void *)
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{
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}
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void sp_counter_ref_hook (void* /*pn*/, long /* use count */)
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{
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}
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void sp_counter_release_hook (void* /*pn*/, long /*use_count*/)
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{
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}
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void sp_array_constructor_hook(void *)
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{
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}
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void sp_array_destructor_hook(void *)
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{
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}
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void sp_scalar_constructor_hook(void *)
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{
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}
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void sp_scalar_destructor_hook(void *)
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{
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}
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}
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