C++可能的线程问题 - 可能是 Ogre 的错误
我的代码中有一个非常奇怪的问题。我正在使用 Ogre,并尝试手动创建材质,但我不认为问题是 Ogre 特有的。链接:头文件、源文件, 堆栈跟踪。请原谅随机名称、注释和 std::cout << 的。我很绝望,但享受有趣的编码:D
如果您不想阅读,这里是我的代码摘要:
- 创建根
- 加载插件
- 设置渲染系统
- 加载资源
- 设置输入系统
- 创建场景管理器
- 创建场景
一个。设置照明
b.手动创建材质
c.使用手动创建的材质将实体添加到场景 - 添加帧更新回调
- 开始渲染
现在,如果我省略步骤 7b 和 7c,代码可以正常工作并按预期运行,并且程序按预期输出到日志。但如果我包括步骤 7b 和 7c,则不会发生任何情况,也不会写入任何日志。该代码永远不会完成第一步。我相信这是一个查看堆栈跟踪的死锁,但不知道如何解决它 - 我不明白稍后添加代码将如何影响之前的代码,因为它将在初始代码之后运行,这就是我怀疑的原因线程问题。欢迎任何建议!预先感谢,嗯。
编辑:删除了大部分代码,仅保留步骤 1、7a、7b 和 7c。我将堆栈跟踪留在其中,因为它不是那么长!
以下是有问题的代码:
步骤 1(第 13 行)
mRoot = new Ogre::Root("", "", "ogre.log");
步骤 7a、b、c(第 146-169 行)
mSceneManager->setAmbientLight(Ogre::ColourValue(0.5, 0.5, 0.5));
std::cout << "Before material creation" << std::endl;
//Make cube material
Ogre::MaterialPtr cube_material_ptr = Ogre::MaterialManager::getSingleton().create(
"trolcherry",
Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME
);
std::cout << "After material creation" << std::endl;
// Get a material pass
Ogre::Pass *pass = cube_material_ptr->getTechnique(0)->getPass(0);
pass->setDiffuse(Ogre::ColourValue(1.0, 0.2, 0.2));
//Make cube
Ogre::Entity& cube_entity = *(mSceneManager->createEntity("Head", "Prefab_Cube"));
cube_entity.setMaterialName("trolcherry");
Ogre::SceneNode& cube_node = *(mSceneManager->getRootSceneNode()->createChildSceneNode());
cube_node.attachObject(&cube_entity);
cube_node.scale(0.3, 0.3, 0.3);
堆栈跟踪
#0 ( 0x0012e416 in __kernel_vsyscall() (??:??)
#1 0x9b20b9 __lll_lock_wait() (../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/lowlevellock.S:142)
#2 0x9af566 pthread_cond_wait@@GLIBC_2.3.2() (../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:299)
#3 0x9223fd __pthread_cond_wait(cond=0xb7bd727c, mutex=0xb7bd7264) (forward.c:139)
#4 0x804c65b boost::recursive_mutex::lock(this=0xb7bd7264) (lib/boost_1_47_0/boost/thread/pthread/recursive_mutex.hpp:133)
#5 0x804d4af boost::unique_lock<boost::recursive_mutex>::lock(this=0xbffff3c4) (lib/boost_1_47_0/boost/thread/locks.hpp:412)
#6 0x47dd96 unique_lock(this=0xb7bd7260, name=..., inGlobalPool=true) (/usr/include/boost/thread/locks.hpp:227)
#7 ( Ogre::ResourceGroupManager::createResourceGroup(this=0xb7bd7260, name=..., inGlobalPool=true) (/home/elliot/Programming/C and C++/Project MuffinSnatcher/lib/ogre_src_v1-7-3/OgreMain/src/OgreResourceGroupManager.cpp:84)
#8 0x47eaa6 Ogre::ResourceGroupManager::ResourceGroupManager(this=0xb7bd7260) (/home/elliot/Programming/C and C++/Project MuffinSnatcher/lib/ogre_src_v1-7-3/OgreMain/src/OgreResourceGroupManager.cpp:61)
#9 0x497bc2 Ogre::Root::Root(this=0xb7ed7260, pluginFileName=..., configFileName=..., logFileName=...) (/home/elliot/Programming/C and C++/Project MuffinSnatcher/lib/ogre_src_v1-7-3/OgreMain/src/OgreRoot.cpp:154)
#10 0x804adfe ProjectMuffinSnatcher::Client::Run(this=0xbffff6ec) (/home/elliot/Programming/C and C++/Project MuffinSnatcher/src/Client.cpp:13)
#11 0x804e0da main() (/home/elliot/Programming/C and C++/Project MuffinSnatcher/src/main.cpp:6)
ldd的输出
linux-gate.so.1 => (0x009a3000)
libboost_system.so.1.42.0 => /usr/lib/libboost_system.so.1.42.0 (0x00c14000)
libOgreMain.so.1.7.3 => /usr/local/lib/libOgreMain.so.1.7.3 (0x00110000)
libOIS-1.3.0.so => /usr/local/lib/libOIS-1.3.0.so (0x006d3000)
libstdc++.so.6 => /usr/lib/i386-linux-gnu/libstdc++.so.6 (0x00ce8000)
libm.so.6 => /lib/i386-linux-gnu/libm.so.6 (0x006f4000)
libgcc_s.so.1 => /lib/i386-linux-gnu/libgcc_s.so.1 (0x00f66000)
libc.so.6 => /lib/i386-linux-gnu/libc.so.6 (0x0071a000)
libpthread.so.0 => /lib/i386-linux-gnu/libpthread.so.0 (0x0087b000)
librt.so.1 => /lib/i386-linux-gnu/librt.so.1 (0x00e7b000)
libfreetype.so.6 => /usr/lib/i386-linux-gnu/libfreetype.so.6 (0x008da000)
libSM.so.6 => /usr/lib/i386-linux-gnu/libSM.so.6 (0x00e2d000)
libICE.so.6 => /usr/lib/i386-linux-gnu/libICE.so.6 (0x00894000)
libX11.so.6 => /usr/lib/i386-linux-gnu/libX11.so.6 (0x009a4000)
libXext.so.6 => /usr/lib/i386-linux-gnu/libXext.so.6 (0x008ac000)
libXt.so.6 => /usr/lib/i386-linux-gnu/libXt.so.6 (0x00abf000)
libXaw.so.7 => /usr/lib/libXaw.so.7 (0x00b11000)
libdl.so.2 => /lib/i386-linux-gnu/libdl.so.2 (0x008bb000)
libboost_thread.so.1.42.0 => /usr/lib/libboost_thread.so.1.42.0 (0x008bf000)
libboost_date_time.so.1.42.0 => /usr/lib/libboost_date_time.so.1.42.0 (0x00960000)
libfreeimage.so.3 => /usr/lib/libfreeimage.so.3 (0x00f82000)
libzzip-0.so.13 => /usr/lib/libzzip-0.so.13 (0x00973000)
libz.so.1 => /lib/i386-linux-gnu/libz.so.1 (0x0097a000)
/lib/ld-linux.so.2 (0x00c2e000)
libuuid.so.1 => /lib/i386-linux-gnu/libuuid.so.1 (0x008d4000)
libxcb.so.1 => /usr/lib/i386-linux-gnu/libxcb.so.1 (0x00b6e000)
libXmu.so.6 => /usr/lib/libXmu.so.6 (0x00b87000)
libXpm.so.4 => /usr/lib/libXpm.so.4 (0x0098f000)
libXau.so.6 => /usr/lib/i386-linux-gnu/libXau.so.6 (0x00b9d000)
libXdmcp.so.6 => /usr/lib/i386-linux-gnu/libXdmcp.so.6 (0x00ba1000)
I have a very strange problem in my code. I'm using Ogre and I'm trying to manually create a material but I don't think the problem is Ogre specific. Links: Header file, Source file, Stack trace. Please excuse random names, comments and std::cout <<'s. I am in despair and enjoy fun coding :D
Here is a summary of my code if you don't wish to read it:
- Create root
- Load plugins
- Setup render system
- Load resources
- Setup input system
- Create scene manager
- Create scene
a. Setup lighting
b. Manually create material
c. Add entity to scene with manually created material - Add frame update callback
- Begin rendering
Now, If I omit steps 7b and 7c, the code works fine and as expected, and the program outputs to a log, as expected. But if I include steps 7b and 7c, nothing happens and no log is written. The code never finishes step one. I believe this is a deadlock from looking at the stack trace but have no idea how to solve it - I don't understand how adding code later on will affect code earlier on as it will run after the initial code, this is why I suspected a threading issue. Any suggestions welcome! Thanks in advance, ell.
Edit: Removed most code, leaving in only steps 1, 7a, 7b and 7c. I'm leaving the stack trace in because its not so long!
Here is the offending code:
Step 1 (line 13)
mRoot = new Ogre::Root("", "", "ogre.log");
Steps 7a,b,c (lines 146-169)
mSceneManager->setAmbientLight(Ogre::ColourValue(0.5, 0.5, 0.5));
std::cout << "Before material creation" << std::endl;
//Make cube material
Ogre::MaterialPtr cube_material_ptr = Ogre::MaterialManager::getSingleton().create(
"trolcherry",
Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME
);
std::cout << "After material creation" << std::endl;
// Get a material pass
Ogre::Pass *pass = cube_material_ptr->getTechnique(0)->getPass(0);
pass->setDiffuse(Ogre::ColourValue(1.0, 0.2, 0.2));
//Make cube
Ogre::Entity& cube_entity = *(mSceneManager->createEntity("Head", "Prefab_Cube"));
cube_entity.setMaterialName("trolcherry");
Ogre::SceneNode& cube_node = *(mSceneManager->getRootSceneNode()->createChildSceneNode());
cube_node.attachObject(&cube_entity);
cube_node.scale(0.3, 0.3, 0.3);
Stack trace
#0 ( 0x0012e416 in __kernel_vsyscall() (??:??)
#1 0x9b20b9 __lll_lock_wait() (../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/lowlevellock.S:142)
#2 0x9af566 pthread_cond_wait@@GLIBC_2.3.2() (../nptl/sysdeps/unix/sysv/linux/i386/i686/../i486/pthread_cond_wait.S:299)
#3 0x9223fd __pthread_cond_wait(cond=0xb7bd727c, mutex=0xb7bd7264) (forward.c:139)
#4 0x804c65b boost::recursive_mutex::lock(this=0xb7bd7264) (lib/boost_1_47_0/boost/thread/pthread/recursive_mutex.hpp:133)
#5 0x804d4af boost::unique_lock<boost::recursive_mutex>::lock(this=0xbffff3c4) (lib/boost_1_47_0/boost/thread/locks.hpp:412)
#6 0x47dd96 unique_lock(this=0xb7bd7260, name=..., inGlobalPool=true) (/usr/include/boost/thread/locks.hpp:227)
#7 ( Ogre::ResourceGroupManager::createResourceGroup(this=0xb7bd7260, name=..., inGlobalPool=true) (/home/elliot/Programming/C and C++/Project MuffinSnatcher/lib/ogre_src_v1-7-3/OgreMain/src/OgreResourceGroupManager.cpp:84)
#8 0x47eaa6 Ogre::ResourceGroupManager::ResourceGroupManager(this=0xb7bd7260) (/home/elliot/Programming/C and C++/Project MuffinSnatcher/lib/ogre_src_v1-7-3/OgreMain/src/OgreResourceGroupManager.cpp:61)
#9 0x497bc2 Ogre::Root::Root(this=0xb7ed7260, pluginFileName=..., configFileName=..., logFileName=...) (/home/elliot/Programming/C and C++/Project MuffinSnatcher/lib/ogre_src_v1-7-3/OgreMain/src/OgreRoot.cpp:154)
#10 0x804adfe ProjectMuffinSnatcher::Client::Run(this=0xbffff6ec) (/home/elliot/Programming/C and C++/Project MuffinSnatcher/src/Client.cpp:13)
#11 0x804e0da main() (/home/elliot/Programming/C and C++/Project MuffinSnatcher/src/main.cpp:6)
Output of ldd
linux-gate.so.1 => (0x009a3000)
libboost_system.so.1.42.0 => /usr/lib/libboost_system.so.1.42.0 (0x00c14000)
libOgreMain.so.1.7.3 => /usr/local/lib/libOgreMain.so.1.7.3 (0x00110000)
libOIS-1.3.0.so => /usr/local/lib/libOIS-1.3.0.so (0x006d3000)
libstdc++.so.6 => /usr/lib/i386-linux-gnu/libstdc++.so.6 (0x00ce8000)
libm.so.6 => /lib/i386-linux-gnu/libm.so.6 (0x006f4000)
libgcc_s.so.1 => /lib/i386-linux-gnu/libgcc_s.so.1 (0x00f66000)
libc.so.6 => /lib/i386-linux-gnu/libc.so.6 (0x0071a000)
libpthread.so.0 => /lib/i386-linux-gnu/libpthread.so.0 (0x0087b000)
librt.so.1 => /lib/i386-linux-gnu/librt.so.1 (0x00e7b000)
libfreetype.so.6 => /usr/lib/i386-linux-gnu/libfreetype.so.6 (0x008da000)
libSM.so.6 => /usr/lib/i386-linux-gnu/libSM.so.6 (0x00e2d000)
libICE.so.6 => /usr/lib/i386-linux-gnu/libICE.so.6 (0x00894000)
libX11.so.6 => /usr/lib/i386-linux-gnu/libX11.so.6 (0x009a4000)
libXext.so.6 => /usr/lib/i386-linux-gnu/libXext.so.6 (0x008ac000)
libXt.so.6 => /usr/lib/i386-linux-gnu/libXt.so.6 (0x00abf000)
libXaw.so.7 => /usr/lib/libXaw.so.7 (0x00b11000)
libdl.so.2 => /lib/i386-linux-gnu/libdl.so.2 (0x008bb000)
libboost_thread.so.1.42.0 => /usr/lib/libboost_thread.so.1.42.0 (0x008bf000)
libboost_date_time.so.1.42.0 => /usr/lib/libboost_date_time.so.1.42.0 (0x00960000)
libfreeimage.so.3 => /usr/lib/libfreeimage.so.3 (0x00f82000)
libzzip-0.so.13 => /usr/lib/libzzip-0.so.13 (0x00973000)
libz.so.1 => /lib/i386-linux-gnu/libz.so.1 (0x0097a000)
/lib/ld-linux.so.2 (0x00c2e000)
libuuid.so.1 => /lib/i386-linux-gnu/libuuid.so.1 (0x008d4000)
libxcb.so.1 => /usr/lib/i386-linux-gnu/libxcb.so.1 (0x00b6e000)
libXmu.so.6 => /usr/lib/libXmu.so.6 (0x00b87000)
libXpm.so.4 => /usr/lib/libXpm.so.4 (0x0098f000)
libXau.so.6 => /usr/lib/i386-linux-gnu/libXau.so.6 (0x00b9d000)
libXdmcp.so.6 => /usr/lib/i386-linux-gnu/libXdmcp.so.6 (0x00ba1000)
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我本想对此发表评论,但我缺乏所需的代表。 :(
有几件事需要尝试:
Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME
是一个静态 OGRE_AUTO_MUTEX 字符串
- 而不是将其直接传递给材质管理器的create
,首先尝试将其复制到本地作用域的 String 实例中,看看错误发生的位置是否发生变化,或者实际上它是否纠正了它。
Ogre::Root 构造函数
您明确使用“”覆盖默认插件和配置文件名(并且没有真正提供日志文件的有用替换 - 从“Ogre.log”更改为“ogre.log”)。 log”)。您可以尝试删除构造函数参数吗?I would have made this a comment, but I lack the required rep. :(
A couple of things to try:
The
Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME
is astatic OGRE_AUTO_MUTEX String
- instead of passing it directly to the material manager'screate
, try to copy it into a locally scoped String instance first. See if that changes where the error occurs, or if in fact it corrects it.Alternatively, I noticed in the
Ogre::Root constructor
you are explicitly overriding the default plugin and config file names with "" (and not really providing a useful replacement of the log file - changed from "Ogre.log" to "ogre.log"). Could you try removing the constructor arguments?我终于解决了我的问题。我删除了所有的 boost 和ogre相关库并重新编译boost,然后ogre并重新安装它们。现在一切正常(显然!)。感谢您的所有帮助,但我想我只需要重新安装即可。很少,我很高兴这一切都结束了!
I've finally fixed my problem. I deleted all boost & ogre related libraries and recompiled boost and then ogre and reinstalled them. Now things work fine (apparently!). Thanks for all the help but I guess a fresh reinstall is all I needed. Few, I'm glad that's over!