为什么我的应用程序在关闭时有时会因SIGSEGV而崩溃？ 我用C++编写了一个应用程序，使用Qt4.7.4。启动时，它加载一些自编动态库，这些库也使用Qt（如果这在某种程度上有用的话）
关闭应用程序时，有时它会因SIGSEGV和以下回溯而崩溃：为什么我的应用程序在关闭时有时会因SIGSEGV而崩溃？ 我用C++编写了一个应用程序，使用Qt4.7.4。启动时，它加载一些自编动态库，这些库也使用Qt（如果这在某种程度上有用的话）,c++,qt,segmentation-fault,C++,Qt,Segmentation Fault,关闭应用程序时，有时它会因SIGSEGV和以下回溯而崩溃： #0 malloc_consolidate (av=0x7ffff58b21c0) at malloc.c:5155 #1 0x00007ffff5591659 in malloc_consolidate (av=0x7ffff58b21c0) at malloc.c:5115 #2 _int_free (av=0x7ffff58b21c0, p=<optimized out>) at malloc.c:5034 #3
#0 malloc_consolidate (av=0x7ffff58b21c0) at malloc.c:5155
#1 0x00007ffff5591659 in malloc_consolidate (av=0x7ffff58b21c0) at malloc.c:5115
#2 _int_free (av=0x7ffff58b21c0, p=<optimized out>) at malloc.c:5034
#3 0x00007ffff5594d7c in __GI___libc_free (mem=<optimized out>) at malloc.c:3738
#4 0x00007ffff5e9e0ac in QString::free (d=0xdb0290) at tools/qstring.cpp:1186
#5 0x00007fffe60b3d83 in ~QString (this=0xba0328, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qstring.h:883
#6 node_destruct (to=0xba0328, from=0xba0328, this=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qlist.h:420
#7 QList<QString>::free (data=0xba0310, this=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qlist.h:744
#8 0x00007fffe60c2b49 in ~QList (this=0xba0388, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qlist.h:719
#9 ~QStringList (this=0xba0388, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qstringlist.h:66
#10 ~SignalHook (this=0xba0358, __in_chrg=<optimized out>) at qdbusconnection_p.h:121
#11 ~QHashNode (this=0xba0340, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qhash.h:216
#12 QHash<QString, QDBusConnectionPrivate::SignalHook>::deleteNode2 (node=0xba0340) at ../../include/QtCore/../../src/corelib/tools/qhash.h:519
#13 0x00007ffff5e754da in QHashData::free_helper (this=0xd8aec0, node_delete=0x7fffe60c2ae0 <QHash<QString, QDBusConnectionPrivate::SignalHook>::deleteNode2(QHashData::Node*)>) at tools/qhash.cpp:271
#14 0x00007fffe60ba733 in freeData (x=<optimized out>, this=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qhash.h:568
#15 ~QHash (this=<optimized out>, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qhash.h:284
#16 ~QMultiHash (this=0xba3498, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qhash.h:922
#17 ~QMultiHash (this=0xba3498, __in_chrg=<optimized out>) at qdbusintegrator.cpp:998
#18 QDBusConnectionPrivate::~QDBusConnectionPrivate (this=0xba33f0, __in_chrg=<optimized out>) at qdbusintegrator.cpp:998
#19 0x00007fffe60ba939 in QDBusConnectionPrivate::~QDBusConnectionPrivate (this=0xba33f0, __in_chrg=<optimized out>) at qdbusintegrator.cpp:1016
#20 0x00007fffe60afe43 in ~QDBusDefaultConnection (this=0xba55a0, __in_chrg=<optimized out>) at qdbusconnection.cpp:993
#21 QGlobalStaticDeleter<QDBusDefaultConnection>::~QGlobalStaticDeleter (this=0x7fffe63102f8, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qglobal.h:1825
#22 0x00007ffff5553821 in __run_exit_handlers (status=0, listp=0x7ffff58b05a8, run_list_atexit=true) at exit.c:78
#23 0x00007ffff55538a5 in __GI_exit (status=<optimized out>) at exit.c:100
#24 0x00007ffff5539314 in __libc_start_main (main=0x493935 <main(int, char**)>, argc=1, ubp_av=0x7fffffffde58, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffde48) at libc-start.c:258
#25 0x0000000000421a99 in _start ()
#0 malloc_合并（av=0x7ffff58b21c0）在malloc.c:5155
#1 0x00007FF5591659在malloc_合并（av=0x7ffff58b21c0）在malloc.c:5115
#在malloc.c:5034处有2个无内部（av=0x7ffff58b21c0，p=）
#3 0x00007FF5594D7C在malloc.c:3738
#在tools/QString.cpp:1186处的QString:：free（d=0xdb0290）中的4 0x00007ffff5e9e0ac
#5 0x00007fffe60b3d83 in~QString（此=0xba0328，uu in_chrg=）位于../../include/QtCore/../src/corelib/tools/QString.h:883
#位于.././include/QtCore/./../src/corelib/tools/qlist.h:420的6节点_自毁（to=0xba0328，from=0xba0328，this=）
#7 QList:：free（data=0xba0310，this=）位于../../include/QtCore/../src/corelib/tools/QList.h:744
#8 0x00007fffe60c2b49 in~QList（this=0xba0388，uu in_chrg=）位于../../include/QtCore/../src/corelib/tools/QList.h:719
#9~QStringList（this=0xba0388，u in_chrg=）位于../../include/QtCore/../src/corelib/tools/QStringList.h:66
#QDBUS连接处的10~信号钩（此=0xba0358，uuu in_uchrg=）p.h:121
#11~QHashNode（this=0xba0340，u in_chrg=）位于../../include/QtCore/../src/corelib/tools/qhash.h:216
#12 QHash:：deleteNode2（node=0xba0340）位于.././include/QtCore/../../src/corelib/tools/QHash.h:519
#在tools/qhash.cpp:271处，QHashData:：free_helper（this=0xd8aec0，node_delete=0x7fffe60c2ae0）中的13 0x00007ffff5e754da
#14 0x00007fffe60ba733在../../include/QtCore/../src/corelib/tools/qhash.h处的自由数据（x=，this=）中
#15~QHash（this=，u in_chrg=）位于../../include/QtCore/../src/corelib/tools/QHash.h:284
#16~QMultiHash（this=0xba3498，u in_chrg=）位于../../include/QtCore/../src/corelib/tools/qhash.h:922
#17~qdbusintegrator.cpp:998处的QMultiHash（this=0xba3498，u in_chrg=）
#18 QDBusConnectionPrivate:：~QDBusConnectionPrivate（this=0xba33f0，u in_chrg=）位于qdbusintegrator.cpp:998
#QDBusConnectionPrivate:中的19 0x00007fffe60ba939:~QDBusConnectionPrivate（this=0xba33f0，uuu in_chrg=）位于qdbusintegrator.cpp:1016
#qdbusconnection处的20 0x00007fffe60afe43 in~QDBusDefaultConnection（this=0xba55a0，uuuu in_chrg=）cpp:993
#21 QGlobalStaticDeleter:：~QGlobalStaticDeleter（this=0x7fffe63102f8，u in_chrg=）位于../../include/QtCore/../src/corelib/global/qglobal.h:1825
#22 0x00007FF5553821在退出时运行退出处理程序（状态=0，列表=0x7ffff58b05a8，运行列表atexit=true）。c:78
#23 0x00007FF55538A5位于出口处的GI出口（状态=）中。c:100
#24 0x00007FF5539314在libc start处的uuu libc_start_main（main=0x493935，argc=1，ubp_av=0x7fffffffde58，init=，fini=，rtld_fini=，stack_end=0x7fffffde48）中。c:258
#25 0x0000000000421a99英寸（U开始）
#0 malloc_consolidate (av=0x7ffff58b21c0) at malloc.c:5155
#1 0x00007ffff5591659 in malloc_consolidate (av=0x7ffff58b21c0) at malloc.c:5115
#2 _int_free (av=0x7ffff58b21c0, p=<optimized out>) at malloc.c:5034
#3 0x00007ffff5594d7c in __GI___libc_free (mem=<optimized out>) at malloc.c:3738
#4 0x00007ffff5f4d5a9 in ~QVector (this=0x767c40, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qvector.h:119
#5 QGlobalStaticDeleter<QVector<QCustomTypeInfo> >::~QGlobalStaticDeleter (this=0x7ffff6274898, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qglobal.h:1825
#6 0x00007ffff5553c3d in __cxa_finalize (d=0x7ffff6273d20) at cxa_finalize.c:56
#7 0x00007ffff5e3e0a6 in __do_global_dtors_aux () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#8 0x00007fffffffd7c0 in ?? ()
#9 0x00007fffffffdd30 in ?? ()
#10 0x00007ffff5f9e5a1 in _fini () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#11 0x000000000000009f in ?? ()
#12 0x00007ffff7deb105 in ?? () from /lib64/ld-linux-x86-64.so.2
#0 malloc_合并（av=0x7ffff58b21c0）在malloc.c:5155
#1 0x00007FF5591659在malloc_合并（av=0x7ffff58b21c0）在malloc.c:5115
#在malloc.c:5034处有2个无内部（av=0x7ffff58b21c0，p=）
#3 0x00007FF5594D7C在malloc.c:3738
#4 0x00007FF5F4D5A9 in~QVector（该值=0x767c40，uu in_chrg=）位于../../include/QtCore/../../src/corelib/tools/QVector.h:119
#5 QGlobalStaticDeleter:：~QGlobalStaticDeleter（this=0x7ffff6274898，u in_chrg=）位于../../include/QtCore/../src/corelib/global/qglobal.h:1825
#6 0x00007FF5553C3D位于cxa\U finalize处的cxa\U finalize（d=0x7ffff6273d20）中。c:56
#7 0x00007FF5E3E0A6，位于/usr/lib/x86\u 64-linux-gnu/libQtCore.so.4中的
#8 0x00007FFFFFF7C0英寸？？()
#9 0x00007fffffffdd30英寸？？()
#10 0x00007ffff5f9e5a1位于/usr/lib/x86_64-linux-gnu/libQtCore.so.4的fini（）中
#11 0x000000000000009f英寸？？()
#12 0x00007FF7DEB105英寸？？（）来自/lib64/ld-linux-x86-64.so.2
#0 malloc_consolidate (av=0x7ffff58b21c0) at malloc.c:5155
#1 0x00007ffff5591659 in malloc_consolidate (av=0x7ffff58b21c0) at malloc.c:5115
#2 _int_free (av=0x7ffff58b21c0, p=<optimized out>) at malloc.c:5034
#3 0x00007ffff5594d7c in __GI___libc_free (mem=<optimized out>) at malloc.c:3738
#4 0x00007ffff5e86bbe in freeData (x=<optimized out>, this=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qmap.h:654
#5 ~QMap (this=0x10af198, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/tools/qmap.h:187
#6 ~QMap (this=0x10af198, __in_chrg=<optimized out>) at tools/qvector.h:430
#7 ~QRegExpAutomatonState (this=0x10af180, __in_chrg=<optimized out>) at tools/qregexp.cpp:947
#8 QVector<QRegExpAutomatonState>::free (x=0x10af0f0, this=<optimized out>) at tools/qvector.h:438
#9 0x00007ffff5e969a9 in clear (this=<optimized out>) at tools/qcache.h:139
#10 ~QCache (this=<optimized out>, __in_chrg=<optimized out>) at tools/qcache.h:103
#11 QGlobalStaticDeleter<QCache<QRegExpEngineKey, QRegExpEngine> >::~QGlobalStaticDeleter (this=0x7ffff6274368, __in_chrg=<optimized out>) at ../../include/QtCore/../../src/corelib/global/qglobal.h:1825
#12 0x00007ffff5553821 in __run_exit_handlers (status=0, listp=0x7ffff58b05a8, run_list_atexit=true) at exit.c:78
#13 0x00007ffff55538a5 in __GI_exit (status=<optimized out>) at exit.c:100
#14 0x00007ffff5539314 in __libc_start_main (main=0x493935 <main(int, char**)>, argc=1, ubp_av=0x7fffffffde58, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fffffffde48) at libc-start.c:258
#15 0x0000000000421a99 in _start ()
#0 malloc_合并（av=0x7ffff58b21c0）在malloc.c:5155
#1 0x00007FF5591659在malloc_合并（av=0x7ffff58b21c0）在malloc.c:5115
#在malloc.c:5034处有2个无内部（av=0x7ffff58b21c0，p=）
#3 0x00007FF5594D7C在malloc.c:3738
#4 0x00007ffff5e86bbe在../../include/QtCore/../src/corelib/tools/qmap.h处的自由数据（x=，this=）中
#5~QMap（this=0x10af198，u in_chrg=）位于../../include/QtCore/../src/corelib/tools/QMap.h:187
#6~QMap（this=0x10af198，uu in_chrg=）位于tools/qvector.h:430
#7~qregexpautomationstate（this=0x10af180，u in_chrg=）位于tools/qregexp.cpp:947
#8 QVector:：free（x=0x10af0f0，this=）位于tools/QVector.h:438
#9 0x00007FF5E969A9在tools/qcache.h:139处处于清除状态（此=）
#10~QCache（this=，u in_chrg=）位于tools/QCache.h:103
#11 QGlobalStaticDeleter:：~QGlobalStaticDeleter（this=0x7ffff6274368，u in_chrg=）位于../../include/QtCore/../src/corelib/global/qglobal.h:1825
#12 0x00007FF5553821位于退出时的“运行”退出”处理程序中（状态=0，列表=0x7ffff58b05a8，运行列表atexit=true）。c:78
#13 0x00007FF55538A5位于出口处的GI出口（状态=）中。c:100
#14 0x00007FF5539314在libc start的uuu libc_start_main（main=0x493935，argc=1，ubp_av=0x7fffffffde58，init=，fini=，rtld_fini=，stack_end=0x7fffffde48）中。c:258
#15 0x0000000000421a99英寸（U开始）
非常感谢您提供了一些提示，说明了为什么会发生这种情况，或者我应该从哪里开始搜索。从coredumps的堆栈帧中，您似乎在某个地方损坏了堆，或者正在释放无效指针
调试此类问题的最佳方法是使用valgrind或Rational Purify plus等内存评测工具评测代码（谷歌搜索应该有很多这样的工具）。这些分析工具将指出问题的根本原因。我找到了问题的解决方案：我将一个静态库链接到我的主应用程序