Re: [Boost-users] thread library

From: monade (monade_at_[hidden])
Date: 2006-01-23 06:54:49

Jens Theisen schrieb:
> So it's only when you have the dynamic allocation but you don't get an  
> exception. How did you find that there is any leak? Do you have a test  
> program?
> 
> Jens

Hi,
I'm using vc.net with a tool called "Visual Leak Detector". As I said,
when build the boost::thread on the stack or doing dynamic allocation
with another thread library (asio socket lib, asio::thread), no leaks
are reported. For my purposes asio::thread is sufficient, even though it
only provides basic thread functionality.
Here is the code and the memory dump:

#include "vld.h" // for memory leak detection
#include <boost/thread/thread.hpp>

void doNothing() {}

int main()
{
   boost::thread* thrd = new boost::thread( &doNothing );
   thrd->join();
   delete thrd;
   return 0;
}

Visual Leak Detector Version 1.0 installed (multithreaded static).
Der Thread 'Win32 Thread' (0xe54) hat mit Code 0 (0x0) geendet.
WARNING: Visual Leak Detector detected memory leaks!
---------- Block 94 at 0x008B2688: 24 bytes ----------
  Call Stack:
    f:\vs70builds\3077\vc\crtbld\crt\src\newop.cpp (12): operator new
    c:\dokumente und einstellungen\godot\eigene dateien\eigene
downloads\boost_1_33_0\libs\thread\src\mutex.inl (55): `anonymous
namespace'::new_critical_section
    c:\dokumente und einstellungen\godot\eigene dateien\eigene
downloads\boost_1_33_0\libs\thread\src\mutex.cpp (48): boost::mutex::mutex
    c:\dokumente und einstellungen\godot\eigene dateien\eigene
downloads\boost_1_33_0\libs\thread\src\tss_hooks.cpp (29): `anonymous
namespace'::init_threadmon_mutex
    c:\dokumente und einstellungen\godot\eigene dateien\eigene
downloads\boost_1_33_0\libs\thread\src\once.cpp (174): boost::call_once
    c:\dokumente und einstellungen\godot\eigene dateien\eigene
downloads\boost_1_33_0\libs\thread\src\tss_hooks.cpp (150): on_thread_exit
    c:\dokumente und einstellungen\godot\eigene dateien\eigene
downloads\boost_1_33_0\libs\thread\src\thread.cpp (117): thread_proxy
    f:\vs70builds\3077\vc\crtbld\crt\src\threadex.c (241): _threadstartex
    0x7C80B50B (File and line number not available): GetModuleFileNameA
  Data:
    40 3D 14 00    FF FF FF FF    00 00 00 00    00 00 00 00
@=...... ........
    00 00 00 00    00 00 00 00
........ ........

---------- Block 93 at 0x008B2820: 8 bytes ----------
  Call Stack:
    f:\vs70builds\3077\vc\crtbld\crt\src\newop.cpp (12): operator new
    c:\dokumente und einstellungen\godot\eigene dateien\eigene
downloads\boost_1_33_0\libs\thread\src\tss_hooks.cpp (29): `anonymous
namespace'::init_threadmon_mutex
    c:\dokumente und einstellungen\godot\eigene dateien\eigene
downloads\boost_1_33_0\libs\thread\src\once.cpp (174): boost::call_once
    c:\dokumente und einstellungen\godot\eigene dateien\eigene
downloads\boost_1_33_0\libs\thread\src\tss_hooks.cpp (150): on_thread_exit
    c:\dokumente und einstellungen\godot\eigene dateien\eigene
downloads\boost_1_33_0\libs\thread\src\thread.cpp (117): thread_proxy
    f:\vs70builds\3077\vc\crtbld\crt\src\threadex.c (241): _threadstartex
    0x7C80B50B (File and line number not available): GetModuleFileNameA
  Data:
    88 26 8B 00    01 CD CD CD
.&...... ........

Visual Leak Detector detected 2 memory leaks.
'threadConsole.exe': 'C:\WINDOWS\system32\dbghelp.dll' entladen
'threadConsole.exe': 'C:\WINDOWS\system32\version.dll' entladen
Visual Leak Detector is now exiting.