Question

更新：之前的代码无法准确描述我的问题。现在改变了：

以下是我的程序的几行代码（Linux上的C ++）。我的程序经常（但不总是）在LINE_A和LINE_B

行崩溃

  class A{
      //...
      map<int, const string> m_int2StrMap;
      //...
      void problematic(){
        //...insert and erase of m_int2StrMap are involved
        char temp[6] = {0};
        int key = 12345;
        //...temp's elements and key might be changed
        map<int, const string>::iterator iter = this->m_int2StrMap.find(key);
        if(iter != this->m_int2StrMap.end())
        {
        /*LINE_A*/  this->m_int2StrMap.erase(iter); 
        }
        /*LINE_B*/  this->m_int2StrMap.insert(pair<int, const string>(key, string ((const char*)temp, 6)));  
        //...
      }
      //...
  }

我使用gdb来回溯生成的核心转储，有些人给了我这个信息：

  (gdb) bt
  #0  0x00ae0410 in __kernel_vsyscall ()
  #1  0x00138df0 in vfprintf () from /lib/libc.so.6
  #2  0x0013a701 in vfprintf () from /lib/libc.so.6
  #3  0x0017128b in __wcstod_internal () from /lib/libc.so.6
  #4  0x00179595 in ____wcstof_l_internal () from /lib/libc.so.6
  #5  0x001799d9 in ____wcstof_l_internal () from /lib/libc.so.6
  #6  0x05bfd581 in operator delete () from /usr/lib/libstdc++.so.6
  #7  0x05bda14d in std::string::_Rep::_M_destroy () from /usr/lib/libstdc++.so.6
  #8  0x08084bf7 in problematic() at /usr/lib/gcc/i386-redhat-linux/4.1.2/../../../../include/c++/4.1.2/bits/basic_string.h:233

有些人表示：

  (gdb) bt
  #0  0x00b81410 in __kernel_vsyscall ()
  #1  0x009ccdf0 in vfprintf () from /lib/libc.so.6
  #2  0x009ce701 in vfprintf () from /lib/libc.so.6
  #3  0x00a0528b in __wcstod_internal () from /lib/libc.so.6
  #4  0x00a0e250 in ____wcstof_l_internal () from /lib/libc.so.6
  #5  0x00a0fd87 in wcsxfrm_l () from /lib/libc.so.6
  #6  0x05bfeab7 in operator new () from /usr/lib/libstdc++.so.6
  #7  0x05bda0fb in std::string::_Rep::_S_create () from /usr/lib/libstdc++.so.6
  #8  0x05bdaef5 in ?? () from /usr/lib/libstdc++.so.6
  #9  0x05bdaff1 in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::basic_string () from /usr/lib/libstdc++.so.6
  #10 0x080843e4 in probblematic() at bad.cpp:LINE_B

上面显示的代码中是否有任何不安全的内容？谢谢

核心转储与C ++ std :: map <int，const =“”string =“”> </int，>

0 个答案: