Re: Leak after using setlocale
From: Doug Harrison [MVP] (dsh_at_mvps.org)
Date: 02/11/05
- Next message: Andrew Chalk: "std::min()"
- Previous message: Peter: "Re: Leak after using setlocale"
- In reply to: Peter: "Re: Leak after using setlocale"
- Messages sorted by: [ date ] [ thread ]
Date: Fri, 11 Feb 2005 11:59:31 -0600
Peter wrote:
>Sorry I didn't say what I used.
>
>I used Task Manager, because the loop it tight, you can watch it
>escalate in the process tab of task manager (if you have the Memeory
>Usage, Memory Delta and VM columns selected).
>
>It you comment out the call the setlocale the process has a steady
>memory usage.
After increasing your loop limit from 100 to 1000000, I see what you mean.
It does look like a leak. I tried using the _CrtXXX heap debugging functions
but was unable to find a leak. Putting your fstream stuff in its own block
and dumping leaks around it reveals no leaks at all; setting a checkpoint
before the loop and dumping leaks after the fstream block yields endless
identical output that looks like this:
Dumping objects ->
{97} normal block at 0x00324500, 512 bytes long.
Data: < > 20 00 20 00 20 00 20 00 20 00 20 00 20 00 20 00
{74} normal block at 0x00324A90, 16 bytes long.
Data: <@wL > 40 77 4C 10 01 00 00 00 00 00 00 00 00 00 00 00
{60} normal block at 0x00322E10, 33 bytes long.
Data: < C -------------> 00 43 00 CD CD CD CD CD CD CD CD CD CD CD CD CD
{59} normal block at 0x00322DB8, 40 bytes long.
Data: < |L > 14 7C 4C 10 16 00 00 00 00 00 00 00 00 00 00 00
Object dump complete.
So the debug heap is too blunt an instrument to determine what's going on.
Possibly the library is using special allocation techniques that bypass
debug heap tracking, or it's acquiring resources directly from Windows that
it isn't releasing. Perhaps something like Purify could help pinpoint the
bug.
As a workaround, instead of specifying LC_CTYPE, you can use LC_ALL. In
addition, I did not observe this problem in VC 7.1.
-- Doug Harrison Microsoft MVP - Visual C++
- Next message: Andrew Chalk: "std::min()"
- Previous message: Peter: "Re: Leak after using setlocale"
- In reply to: Peter: "Re: Leak after using setlocale"
- Messages sorted by: [ date ] [ thread ]
Relevant Pages
|
