[Dune] [#1006] valgrind and dune-grid

[Dune]

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A new Flyspray task has been opened.  Details are below. 

User who did this - Elias Pipping (pipping) 

Attached to Project - Dune
Summary - valgrind and dune-grid
Task Type - Bug Report
Category - Grid
Status - Unconfirmed
Assigned To - 
Operating System - Linux
Severity - Low
Priority - Normal
Reported Version - SVN (pre2.2)
Due in Version - Undecided
Due Date - Undecided
Details - I find the following rather odd:

Imagine I have a piece of code like the following:

% < foo.cpp
int
main()
{
  return 0;
}
%

Which I compile into foo.o:

% g++ -c foo.cpp

Linking it and running valgrind on the executable yields nothing surprising:

% g++ foo.o -o foo
% valgrind ./foo
==4727== Memcheck, a memory error detector
==4727== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al.
==4727== Using Valgrind-3.6.0.SVN-Debian and LibVEX; rerun with -h for copyright info
==4727== Command: ./foo
==4727== 
==4727== 
==4727== HEAP SUMMARY:
==4727==     in use at exit: 0 bytes in 0 blocks
==4727==   total heap usage: 0 allocs, 0 frees, 0 bytes allocated
==4727== 
==4727== All heap blocks were freed -- no leaks are possible
==4727== 
==4727== For counts of detected and suppressed errors, rerun with: -v
==4727== ERROR SUMMARY: 0 errors from 0 contexts (suppressed: 4 from 4)
% 

If I, however, link against the library dune-grid library as well:

% libtool --mode link g++ foo.o <DUNE>/dune-grid/build_clang/lib/libdunegrid.la -o foo
libtool: link: g++ foo.o -o .libs/foo  <DUNE>/dune-grid/build_clang/lib/.libs/libdunegrid.so
% 

Valgrind will tell me:

% libtool --mode execute valgrind ./foo
==5029== Memcheck, a memory error detector
==5029== Copyright (C) 2002-2010, and GNU GPL'd, by Julian Seward et al.
==5029== Using Valgrind-3.6.0.SVN-Debian and LibVEX; rerun with -h for copyright info
==5029== Command: <HOME>/.libs/lt-foo
==5029== 
==5029== Invalid free() / delete / delete[]
==5029==    at 0x4C240FD: free (vg_replace_malloc.c:366)
==5029==    by 0x5DBB95A: free_mem (in /lib/libc-2.11.2.so)
==5029==    by 0x5DBB4F1: __libc_freeres (in /lib/libc-2.11.2.so)
==5029==    by 0x4A2067B: _vgnU_freeres (vg_preloaded.c:62)
==5029==    by 0x5CE158D: __run_exit_handlers (exit.c:93)
==5029==    by 0x5CE1634: exit (exit.c:100)
==5029==    by 0x5CC9C53: (below main) (libc-start.c:260)
==5029==  Address 0x4049008 is not stack'd, malloc'd or (recently) free'd
==5029== 
==5029== 
==5029== HEAP SUMMARY:
==5029==     in use at exit: 0 bytes in 0 blocks
==5029==   total heap usage: 48 allocs, 50 frees, 10,693 bytes allocated
==5029== 
==5029== All heap blocks were freed -- no leaks are possible
==5029== 
==5029== For counts of detected and suppressed errors, rerun with: -v
==5029== ERROR SUMMARY: 2 errors from 1 contexts (suppressed: 4 from 4)
% 

In the above output, I've manually replaced the path to foo.o with
<HOME> and the path to dune-grid with <DUNE>.

More information can be found at the following URL:
http://www.dune-project.org/flyspray/index.php?do=details&task_id=1006

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