我正在嘗試爲集成/移動平臺構建C++庫。該平臺有一個體面的庫,包括stdC++。我試圖建立的庫使用了流,並且每當它嘗試使用依賴於流的類時,我都會遇到'bad_cast'異常。這個std :: ostream相關的堆棧跟蹤是什麼意思?
0 0xb082d9b1 in SignalKill()
from /home/preet/bbndk-2.0.1/target/qnx6/x86/lib/libc.so.3
1 0xb081aa7e in raise()
from /home/preet/bbndk-2.0.1/target/qnx6/x86/lib/libc.so.3
2 0xb0818cb8 in abort()
from /home/preet/bbndk-2.0.1/target/qnx6/x86/lib/libc.so.3
3 0xb87c48bf in __gnu_cxx::__verbose_terminate_handler()
at ../../../../../libstdc++-v3/libsupc++/vterminate.cc:93
4 0xb87c23d6 in __cxxabiv1::__terminate (
handler=0xb87c47c0 <__gnu_cxx::__verbose_terminate_handler()>)
at ../../../../../libstdc++-v3/libsupc++/eh_terminate.cc:38
5 0xb87c2421 in std::terminate()
at ../../../../../libstdc++-v3/libsupc++/eh_terminate.cc:48
6 0xb87c2563 in __cxxabiv1::__cxa_throw (obj=0x859e710, tinfo=0xb87f4c24,
dest=0xb87c0670 <std::bad_cast::~bad_cast()>)
at ../../../../../libstdc++-v3/libsupc++/eh_throw.cc:83
7 0xb875e88c in std::__throw_bad_cast()
at ../../../../../libstdc++-v3/src/functexcept.cc:52
8 0xb8798c0d in __check_facet<std::ctype<char> > (__f=<optimized out>)
at /home/builder/hudson/650-gcc-4.4/svn/linux-x86-o-ntox86/i486-pc-nto-qnx6.5.0/pic/libstdc++-v3/include/bits/basic_ios.h:49
9 widen (__c=<optimized out>, this=<optimized out>)
at /home/builder/hudson/650-gcc-4.4/svn/linux-x86-o-ntox86/i486-pc-nto-qnx6.5.0/pic/libstdc++-v3/include/bits/basic_ios.h:440
10 std::endl<char, std::char_traits<char> > (__os=...)
at /home/builder/hudson/650-gcc-4.4/svn/linux-x86-o-ntox86/i486-pc-nto-qnx6.5.0/pic/libstdc++-v3/include/ostream:539
11 0xb8793c2d in std::ostream::operator<< (this=0x84db220,
__pf=0x804f64c <[email protected]>)
at /home/builder/hudson/650-gcc-4.4/svn/linux-x86-o-ntox86/i486-pc-nto-qnx6.5.0/pic/libstdc++-v3/include/ostream:113
12 0x0805240d in QDecViewport::QDecViewport (this=0x86da6c0, parent=0x0)
at ../qml_osg_viewport/qdecviewport.cpp:12
13 0x08051cca in QDeclarativePrivate::QDeclarativeElement<QDecViewport>::QDeclarativeElement (this=0x86da6c0)
at /usr/local/Trolltech/QtLighthouse-4.8.2-i386/include/QtDeclarative/qdeclarativeprivate.h:83
14 0x08051d3c in QDeclarativePrivate::createInto<QDecViewport> (
memory=0x86da6c0)
at /usr/local/Trolltech/QtLighthouse-4.8.2-i386/include/QtDeclarative/qdeclarativeprivate.h:91
15 0xb8ad5ec5 in ??()
16 0x086da6c0 in ??()
17 0x00000000 in ??()
框架7-11是相關的,我需要幫助理解。代碼幀12所指的行只是:
OSG_INFO << "Hello OSG" << std::endl;
其中OSG_INFO是用於記錄的流重定向器。我可以用同樣的方式使用std :: cout而不會有任何問題。 Unmangling框架11給我:
__pf=0x804f64c <std::basic_ostream<char, std::char_traits<char> >& std::endl<char, std::char_traits<char> >(std::basic_ostream<char, std::char_traits<char> >&)@plt>)
這仍然是相當神祕的...我想要了解的東西快要瘋了,如果可能我是想通過一些奇怪的東西到ofstream的輸出操作,但它只是文本。有沒有人有什麼建議?
除了ildjarn說的話,似乎安裝到流中的某些方面沒有實現正確的類型('__check_facet'中的'dynamic_cast'失敗)。你在使用任何自定義方面? –