Re: [Mingw-users] Memory Debugging Tools for MinGW

[David E. <cr...@um...>]

On Sat, 19 Jul 2003, Greg Chicares wrote:

> David Eisner wrote:
> >
> > Hi.  I'm looking for information about memory debugging tools,
> > (like valgrind, electric fence, etc.) that can be used with MinGW.
> >
> > I found this excellent summary in the archives:
> >
> >   http://sourceforge.net/mailarchive/message.php?msg_id=2623449
> >
> > His guess was that mpatrol was the way to go, but I haven't been
> > able to get it to compile on MinGW.
>
> An mpatrol makefile that works for mingw:
>   http://groups.yahoo.com/group/mpatrol/message/786
>
> Samples--dll issues and linking options:
>   http://groups.yahoo.com/group/mpatrol/message/792


Thanks.  I was able to build mpatrol and statically link against it,
but I'm having some issues.

Setup:

  oroborus [ working ]$ gcc -v
  Reading specs from
  C:/cygwin/usr/local/gcc-2.95.3/bin/../lib/gcc-lib/mingw32/2.95.3-8/specs
  gcc version 2.95.3-8 (mingw special)

(Yes, I'm using gcc 2.95.3.  gcc 3.x is not an option right now.
 And I'm using cygwin, but just for the shell, not the compiler).

  mpatrol version is mpatrol_1.4.8.tar.gz, built with the makefile in
  mpatrol-msw-GNUmakefile.tar.gz


OK, here's a test program:

  #include <stdio.h>
  #include <stdlib.h>
  #include <string.h>


  int
  main( int argc, char *argv[] ) {

      char *rndm, *foo;


      rndm = (char *) malloc( 8 * sizeof( char ));
      rndm[8] = 0xAB;

      foo =  strdup( "yahtzee" );
      exit(0);
  }



What I'm observing is that if I comment out the strdup() call,
mpatrol (in mpatrol.log) correctly reports the memory error.
But, if I include the strdup call, no error is reported.

Here's how it's built:

gcc -c -g -DWIN32 -I.. -I../../../../include   ../main.c -o main.o
gcc -g -DWIN32 -I.. -I../../../../include  -Wl -L../../../../lib/win32 main.o -lmpatrol -lbfd -liberty -limagehlp -o silly_tool.exe


Thanks in advance for your help.

-David



------------------------+--------------------------+
David Eisner            | E-mail: cr...@um...   |
CALCE EPSC              | Phone:  301-405-5341     |
University of Maryland  | Fax:    301-314-9269     |
------------------------+--------------------------+