如何在 Linux 上捕获 ostream 异常

我的 Linux C++应用程序在将字符串写入 ostream 对象时崩溃。我的原始应用程序尝试创建一个非常大的字符串输出并将所有字符串输出写入流中。将字符串写入 OSTREAM 对象时，应用程序崩溃。起初，崩溃发生在Windows和Linux上。

现在，该问题已在Windows环境中修复(详细信息如下(。 但在Linux中它正在崩溃。

下面是将生成相同方案的示例 c++ 程序。

#include <iostream>
#include <strstream>
#include <memory>
using namespace std;
bool fillScreen(std::ostream&);
int main ()
{
    auto_ptr<ostrstream> screen(new ostrstream);
    bool succ = false;
    try
    {
        succ = fillScreen(*screen);
    }catch(std::exception &ex)
    {
        std::cerr << ex.what() << std::endl;
    }
    if(succ)
    {
        std::cout << "SCREEN Content is : " << screen->str() << std::endl;
    }
    else
    {
        std::cout << "NOTHING ON SCREEN Object " << std::endl;
    }
}
bool fillScreen(ostream &scr)
{
    unsigned long idx = 0;
    scr.exceptions(std::ios::badbit);// throws exception in windows but not in Linux.
    while (idx++ < 999999999)
    {
        scr << "BLAHBLAHBLAH_BLAH_BLAHBLAHBLAH_BLAH BLAHBLAHBLAH_BLAH BLAHBLAHBLAH_BLAH_" << " : " ;
        scr << "BLAHBLAHBLAH_BLAH_BLAHBLAHBLAH_BLAH_BLAHBLAHBLAH_BLAH_BLAHBLAHBLAH_BLAH_BLAHBLAHBLAH_BLAH_BLAHBLAHBLAH_BLAH_";
        scr << "BLAHBLAHBLAH_BLAH_BLAHBLAHBLAH_BLAH_BLAHBLAHBLAH_BLAH_BLAHBLAHBLAH_BLAH_BLAHBLAHBLAH_BLAH_BLAHBLAHBLAH_BLAH_"<< std::endl;   
        /*if(!(idx %100000))
        {
            std::cout << "Reached iteration: " << idx << std::endl;
        }*/
    }
    return true;
}

我在我的程序中添加了以下语句

screen.exceptions(std::ios::badbit);

有了这个声明，我的程序就不会在窗口中崩溃。在 Windows 上运行时，流会引发 badbit 异常，我的应用程序会处理异常并干净退出。

输出如下，

Windows输出：(使用cygwin运行(

$ ./overflow.exe
bad allocation
NOTHING ON SCREEN Object

干净退出。

Linux 输出：

[Mybuild@devlnx01 streamError]$ ./a.out
Segmentation fault (core dumped)
[Mybuild@devlnx01 streamError]$

坠毁 - 不是一个干净的出口。即使设置了例外情况

screen.exceptions(std::ios::badbit);

以下是使用 Linux gdb 进行的堆栈跟踪(使用核心转储文件(

Core was generated by `./a.out'.
Program terminated with signal 11, Segmentation fault.
#0  std::strstreambuf::overflow (this=0x17f8018, c=72) at ../../.././libstdc++-v3/src/strstream.cc:174
174     ../../.././libstdc++-v3/src/strstream.cc: No such file or directory.
        in ../../.././libstdc++-v3/src/strstream.cc
Missing separate debuginfos, use: debuginfo-install glibc-2.12-1.107.el6.x86_64
(gdb) where
#0  std::strstreambuf::overflow (this=0x17f8018, c=72) at ../../.././libstdc++-v3/src/strstream.cc:174
#1  0x00007eff6f4e7565 in std::basic_streambuf<char, std::char_traits<char> >::xsputn (this=0x17f8018, __s=<value optimized out>, __n=72)
    at /export/disk1/build/GCC4.5.3/gcc-4.5.3/x86_64-unknown-linux-gnu/libstdc++-v3/include/bits/streambuf.tcc:97
#2  0x00007eff6f4ddb85 in sputn (__out=..., __s=0x401038 "BLAHBLAHBLAH_BLAH_BLAHBLAHBLAH_BLAH BLAHBLAHBLAH_BLAH BLAHBLAHBLAH_BLAH_", __n=72)
    at /export/disk1/build/GCC4.5.3/gcc-4.5.3/x86_64-unknown-linux-gnu/libstdc++-v3/include/streambuf:429
#3  __ostream_write<char, std::char_traits<char> > (__out=...,
    __s=0x401038 "BLAHBLAHBLAH_BLAH_BLAHBLAHBLAH_BLAH BLAHBLAHBLAH_BLAH BLAHBLAHBLAH_BLAH_", __n=72)
    at /export/disk1/build/GCC4.5.3/gcc-4.5.3/x86_64-unknown-linux-gnu/libstdc++-v3/include/bits/ostream_insert.h:48
#4  std::__ostream_insert<char, std::char_traits<char> > (__out=...,
    __s=0x401038 "BLAHBLAHBLAH_BLAH_BLAHBLAHBLAH_BLAH BLAHBLAHBLAH_BLAH BLAHBLAHBLAH_BLAH_", __n=72)
    at /export/disk1/build/GCC4.5.3/gcc-4.5.3/x86_64-unknown-linux-gnu/libstdc++-v3/include/bits/ostream_insert.h:99
#5  0x00007eff6f4dde0f in std::operator<< <std::char_traits<char> > (__out=...,
    __s=0x401038 "BLAHBLAHBLAH_BLAH_BLAHBLAHBLAH_BLAH BLAHBLAHBLAH_BLAH BLAHBLAHBLAH_BLAH_")
    at /export/disk1/build/GCC4.5.3/gcc-4.5.3/x86_64-unknown-linux-gnu/libstdc++-v3/include/ostream:513
#6  0x0000000000400d82 in fillScreen (scr=...) at overflow.cxx:35
#7  0x0000000000400c31 in main () at overflow.cxx:14

版本和编译器详细信息。

视窗 2008 (64位( - VS2008

RHEL62(64位( GCC 版本 4.4.7编译参数。$g++ overflow.cxx -g3 -m64 -O0 -ggdb

正在正常退出，但是在Linux中，它因分段错误而崩溃。我正在寻找的是我的应用程序应该干净退出。我不希望它因分段错误错误而退出。

我不确定如何在 Linux 中处理这个问题，任何人都可以指导我吗？