c++ - 如何使用 std::_Rb_tree_insert_and_rebalance 修复 Ogre3d 段错误？

Question

我正在使用 Ogre3d 开发一个 3d 音乐可视化器，基本上它是一个频谱分析器，很像旧的 xmms 插件:

它运行良好，绘制和更新了条形图，没有帧率问题，但随机崩溃。有时它可以毫无问题地运行，完成歌曲，有时它会立即崩溃，有时音乐会停止，而不会崩溃。

这是主类的源代码:

https://github.com/balazsbela/OgreVisualizer/blob/master/src/VisualizerApplication.cpp#L221

此外，当我显示来自 Ogre 样本的帧率叠加层时，崩溃的发生频率似乎也降低了。限制帧率会有帮助吗？

崩溃似乎是随机的。是性能问题吗？

请帮帮我，我在这方面很迷茫，我也在 Ogre3d 论坛上发帖，但没有收到任何回复。

(http)://www.ogre3d.org/forums/viewtopic.php?f=2&t=63207

谢谢。

回溯:

balazsbela@darknet:~/workspace/OgreVisualizer/Release$ gdb OgreVisualizer core
GNU gdb (GDB) 7.2-debian
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i486-linux-gnu".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>...
Reading symbols from /home/balazsbela/workspace/OgreVisualizer/Release/OgreVisualizer...done.
[New Thread 17705]
[New Thread 17702]
[New Thread 17703]
[New Thread 17700]
Reading symbols from /usr/lib/libv4l/v4l1compat.so...(no debugging symbols found)...done.
Loaded symbols for /usr/lib/libv4l/v4l1compat.so
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Core was generated by `./OgreVisualizer'.
Program terminated with signal 11, Segmentation fault.
#0  0xb6dc563d in std::_Rb_tree_insert_and_rebalance(bool, std::_Rb_tree_node_base*, std::_Rb_tree_node_base*, std::_Rb_tree_node_base&) ()
   from /usr/lib/libstdc++.so.6
(gdb) bt
#0  0xb6dc563d in std::_Rb_tree_insert_and_rebalance(bool, std::_Rb_tree_node_base*, std::_Rb_tree_node_base*, std::_Rb_tree_node_base&) ()
   from /usr/lib/libstdc++.so.6
#1  0xb73bb3c2 in std::_Rb_tree<Ogre::Node*, Ogre::Node*, std::_Identity<Ogre::Node*>, std::less<Ogre::Node*>, Ogre::STLAllocator<Ogre::Node*, Ogre::CategorisedAllocPolicy<(Ogre::MemoryCategory)0> > >::_M_insert_(std::_Rb_tree_node_base const*, std::_Rb_tree_node_base const*, Ogre::Node* const&) ()
   from /usr/local/lib/libOgreMain.so.1.7.1
#2  0xb73b5a52 in _M_insert_unique (this=0xb6157ea0, child=0xb616aff8, forceParentUpdate=false) at /usr/include/c++/4.4/bits/stl_tree.h:1182
#3  insert (this=0xb6157ea0, child=0xb616aff8, forceParentUpdate=false) at /usr/include/c++/4.4/bits/stl_set.h:411
#4  Ogre::Node::requestUpdate (this=0xb6157ea0, child=0xb616aff8, forceParentUpdate=false)
    at /home/balazsbela/Downloads/ogre_src_v1-7-1/OgreMain/src/OgreNode.cpp:805
#5  0xb73b6a40 in Ogre::Node::needUpdate (this=0xb616aff8, forceParentUpdate=92)
    at /home/balazsbela/Downloads/ogre_src_v1-7-1/OgreMain/src/OgreNode.cpp:789
#6  0xb73b5038 in Ogre::Node::setScale (this=0x1825c, scale=...) at /home/balazsbela/Downloads/ogre_src_v1-7-1/OgreMain/src/OgreNode.cpp:638
#7  0x0805d306 in VisualizerApplication::adjustNodes (this=0x9cd4808) at ../src/VisualizerApplication.cpp:236
#8  0xb6e867f0 in ?? () from /usr/lib/libSDL_mixer-1.2.so.0
#9  0xb6e8719a in ?? () from /usr/lib/libSDL_mixer-1.2.so.0
#10 0xb6ed9b0d in ?? () from /usr/lib/libSDL-1.2.so.0
#11 0xb6ee185e in ?? () from /usr/lib/libSDL-1.2.so.0
#12 0xb6f2e0bd in ?? () from /usr/lib/libSDL-1.2.so.0
#13 0xb6bc7955 in start_thread (arg=0xb198ab70) at pthread_create.c:300
#14 0xb6ca6e7e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
(gdb) 

Ogre.log:http://pastie.org/1581790

Answer 1

我在您发布的链接中找不到第 236 行，但这种段错误通常与更改 STL 结构有关，而您在堆栈中使用位于其下方的函数中的迭代器访问它。