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std::stringstream

 
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Christer Borgqvist
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PostPosted: Sat Dec 09, 2006 7:44 pm    Post subject: std::stringstream Reply with quote


Don`t now if this is the right group, but I`m using a std::stringstream
and run BDS 2006 with Codeguard and get the following
Pointer in freed memory in process: Project1.exe(1264) -
c:\program\borland\bds\4.0\include\dinkumware\sstream#125
0x00F9A248-0x00F9A248.
0x0041728C - c:\program\borland\bds\4.0\include\dinkumware\sstream#125
0x0041568F -
c:\program\borland\bds\4.0\include\dinkumware\streambuf#465
0x0040AA01 -
c:\program\borland\bds\4.0\include\dinkumware\streambuf#151
0x004049BC - c:\program\borland\bds\4.0\include\dinkumware\ostream#679
0x00406B10 - D:\project\BDS\temp\boost_threads\Unit1.cpp#284
0x52058F46
The object (0x00F9A248) [size: 32 bytes] was created with new
0x00411444 - c:\program\borland\bds\4.0\include\dinkumware\xmemory#28
0x004103C4 - c:\program\borland\bds\4.0\include\dinkumware\xmemory#143
0x00417173 - c:\program\borland\bds\4.0\include\dinkumware\sstream#105
0x0041568F -
c:\program\borland\bds\4.0\include\dinkumware\streambuf#465
0x0040AA01 -
c:\program\borland\bds\4.0\include\dinkumware\streambuf#151
0x004049BC - c:\program\borland\bds\4.0\include\dinkumware\ostream#679
The object (0x00F9A248) was deleted with delete
0x0040BA76 - c:\program\borland\bds\4.0\include\dinkumware\xmemory#138
0x004171CC - c:\program\borland\bds\4.0\include\dinkumware\sstream#111
0x0041568F -
c:\program\borland\bds\4.0\include\dinkumware\streambuf#465
0x0040AA01 -
c:\program\borland\bds\4.0\include\dinkumware\streambuf#151
0x004049BC - c:\program\borland\bds\4.0\include\dinkumware\ostream#679
0x00406B10 - D:\project\BDS\temp\boost_threads\Unit1.cpp#284

why?

//Christer
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Thomas Maeder [TeamB]
Guest
PostPosted: Sun Dec 10, 2006 5:45 pm    Post subject: Re: std::stringstream Reply with quote


Christer Borgqvist <christer.borgqvist10 (AT) bredband (DOT) net> writes:

Quote:
Don`t now if this is the right group, but I`m using a
std::stringstream and run BDS 2006 with Codeguard and get the
following

[snip]

Please post the minimal program that causes this to happen.
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Christer Borgqvist
Guest
PostPosted: Sun Dec 10, 2006 7:16 pm    Post subject: Re: std::stringstream Reply with quote


Thomas Maeder [TeamB] skrev:
Quote:
Christer Borgqvist <christer.borgqvist10 (AT) bredband (DOT) net> writes:

Don`t now if this is the right group, but I`m using a
std::stringstream and run BDS 2006 with Codeguard and get the
following

[snip]

Please post the minimal program that causes this to happen.
void __fastcall TForm1::Button12Click(TObject *Sender)

{
std::stringstream ss;
ss << "insert some text";
ss << "insert some int" << 100;
}
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Thomas Maeder [TeamB]
Guest
PostPosted: Sun Dec 10, 2006 11:14 pm    Post subject: Re: std::stringstream Reply with quote
Christer Borgqvist <christer.borgqvist10 (AT) bredband (DOT) net> writes:

Quote:
Please post the minimal program that causes this to happen.

void __fastcall TForm1::Button12Click(TObject *Sender)
{
std::stringstream ss;
ss << "insert some text";
ss << "insert some int" << 100;
}

This is not a program; it's a member function.

Please post a minimal (<50 lines), *complete* command-line
(i.e. non-VCL) program.
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Arnie
Guest
PostPosted: Mon Dec 11, 2006 7:33 pm    Post subject: Re: std::stringstream Reply with quote
"Christer Borgqvist" <christer.borgqvist10 (AT) bredband (DOT) net> wrote in message
news:457abd7a$1 (AT) newsgroups (DOT) borland.com...
Quote:
Don`t now if this is the right group, but I`m using a std::stringstream
and run BDS 2006 with Codeguard and get the following
why?

//Christer

I don't know if this is the same problem or not. I use VS2005 which comes
with Dinkumware. There's a known problem in streams where the constructor
will lose memory. I do believe it was 32 bytes. I know it's not fixed in
VS2005 yet. I don't know its status in BDS.

We discovered this when using streams inside of a very loop loop - millions
of iterations. The loss was pretty obvious in our case.

- Arnie
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Arnie
Guest
PostPosted: Tue Dec 12, 2006 6:00 am    Post subject: Re: std::stringstream Reply with quote
Quote:
We discovered this when using streams inside of a very loop
loop - millions of iterations. The loss was pretty obvious in
our case.

Of course, you lnow I meant "long loop" but it was Monday morning
and I was still pretty loopy ;-)

- Arnie
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