VC++ 2005的STL的内存泄露

2005 CRT memory leaks: std::basic_iostream ( affects std::stringstream, std::fstream, probably others )！！！

这真是件让人郁闷的事情！下面的代码将重现这个错误：

1 #include < sstream >
2
3 int main()
4 {
5 unsigned int x = 10000000 ;
6 while (x -- )
7 {
8 std::iostreams( 0 );
9 }
10 }

每次泄漏是4Bytes, 结果可想而知！当然，这么重要的错误，MS不可能没有反应。FDBK40119#1: Patch ostream and istream and rebuild msvcp80.dll (http://lab.msdn.microsoft.com/ProductFeedback/ViewWorkaround.aspx?FeedbackID=FDBK40119#1) 有说明解决方案，不过由于要手动操作，给人的感觉并不好。不过，不手动操作又无法解决这个问题，因为：

We have plans for two service pack releases for the first part of 2006:

• VS 2003 SP1 is scheduled for April 2006. We have done much of the work for this release already, and are anxious to get it to you.
• VS 2005 SP1 is scheduled for the first half of 2006. We will be more specific about the date in a few months, once we have more customer data.

(http://blogs.msdn.com/scottwil/archive/2005/11/07/490007.aspx)

-------------------

手动操作的说明：

References:

P.J. Plauger, Dinkumware - Supplied the modified constructors.

"Building the Run-Time Libraries, MSDN2 online, http://msdn2.microsoft.com/en-us/library/k9a8ehy3.aspx - How to rebuild the MSVC runtime libraries.

Workaround Steps:
1. Change the relevant constructor in

{C:\Program Files\Microsoft Visual Studio 8}\vc\include\istream and
{C:\Program Files\Microsoft Visual Studio 8}\vc\crt\src\istream
* directory between {} is the location of the MSVC 8 install directory

explicit __CLR_OR_THIS_CALL basic_iostream(basic_streambuf<_Elem,_Traits> *_Strbuf)
: basic_istream<_Elem, _Traits>(_Strbuf, false),
basic_ostream<_Elem, _Traits>(_Noinit, false)
{ // construct from stream buffer pointer
}

注：修改前内容
explicit __CLR_OR_THIS_CALL basic_iostream(basic_streambuf<_Elem, _Traits> *_Strbuf)
: basic_istream<_Elem, _Traits>(_Strbuf, false),
basic_ostream<_Elem, _Traits>(_Strbuf)
{// construct from stream buffer pointer
}

2. Change the relevant constructor in

{C:\Program Files\Microsoft Visual Studio 8}\vc\include\ostream and
{C:\Program Files\Microsoft Visual Studio 8}\vc\crt\src\ostream

__CLR_OR_THIS_CALL basic_ostream(_Uninitialized, bool _Addit = true)
{ // construct uninitialized
if (_Addit)
ios_base::_Addstd(this); // suppress for
iostream
}

注修改前内容：
__CLR_OR_THIS_CALL basic_ostream(_Uninitialized)
{// construct uninitialized
ios_base::_Addstd(this);
}


3. Rebuild the MSVC libraries by running:

{C:\Program Files\Microsoft Visual Studio 8}\vc\crt\src\bldnt.cmd
* See reference link from description for details on rebuilding the MSVC libraries.

注：注意使用前需要设置一个环境变量，makefile文件中有相关说明
# If your MSVC++ 8.0 installation is not in the default installation path
# of "\Program Files\Microsoft Visual Studio 8\VC" on the current drive,
# set the environment variable VCTOOLS to point to the main directory
# of your installation. (For example, "set VCTOOLS=C:\VS.NET\VC8")

4. Modify the Visual Studio project files

a. Properties->Linker->Input , "Ignore Specific Libraries" : msvcprt.lib;msvcrt.lib
b. Properties->Linker->Input, "Additional Dependencies" :
"{C:\Program Files\Microsoft Visual Studio 8}\vc\crt\src\build\intel\sample_p.lib"
"{C:\Program Files\Microsoft Visual Studio 8}\vc\crt\src\build\intel\_sample_.lib"
* Refer to reference link from description on details of the file naming.

5. Put the sample_p.dll and _sample_.dll in the same directory as your app ( or follow the rules for side-by-side deployment).

转载自：http://www.cnblogs.com/WuErPIng/archive/2006/01/01/309514.html

作者：吴尔平