problem with PetscSynchronizedFPrintf (fwd)

[Satish Balay]

Matt - Perhaps ex7 is a different Problem. But it does crash for me.
And I noticed the following code:

>>>>>>>>>>>
    ierr = PetscNew(struct _PrintfQueue,&next);CHKERRQ(ierr);
    if (queue) {queue->next = next; queue = next;}
    else       {queuebase   = queue = next;}
    queuelength++;
    string = next->string;
    ierr = PetscMemzero(string,QUEUESTRINGSIZE);CHKERRQ(ierr);
<<<<<<<<<

i.e 'next' is allocated - here is no malloc for 'next->string'. But
its being zeroed in PetscMemzero() - hence the crash with ex7 for me.

Satish

---------------------------------------------

asterix:/home/balay/spetsc/src/dm/ao/examples/tests>mpiexec -n 2 ./ex7
Number of elements in ordering 10
PETSc->App  App->PETSc
  0    0      0    0
  1    5      1    2
  2    1      2    4
  3    6      3    6
  4    2      4    8
  5    7      5    1
  6    3      6    3
  7    8      7    5
  8    4      8    7
  9    9      9    9
[1]PETSC ERROR: --------------------- Error Message ------------------------------------
[1]PETSC ERROR: Null argument, when expecting valid pointer!
[1]PETSC ERROR: Trying to zero at a null pointer!
[1]PETSC ERROR: ------------------------------------------------------------------------
[1]PETSC ERROR: Petsc Development Version 2.3.3, Patch 13, unknown HG revision: unknown
[1]PETSC ERROR: See docs/changes/index.html for recent updates.
[1]PETSC ERROR: See docs/faq.html for hints about trouble shooting.
[1]PETSC ERROR: See docs/index.html for manual pages.
[1]PETSC ERROR: ------------------------------------------------------------------------
[1]PETSC ERROR: ./ex7 on a asterix64 named asterix by balay Mon Jul 21 14:51:02 2008
[1]PETSC ERROR: Libraries linked from /home/balay/spetsc/lib
[1]PETSC ERROR: Configure run at Mon Jul 21 10:38:52 2008
[1]PETSC ERROR: Configure options --with-mpi-dir=/home/balay/soft/linux64/mpich2-1.0.7 --with-shared=1 PETSC_ARCH=asterix64
[1]PETSC ERROR: ----------------------------[0] Number of indices in (stride) set 5
[0] 0 0
[0] 1 2
[0] 2 4
[0] 3 6
[0] 4 8
--------------------------------------------
[1]PETSC ERROR: PetscMemzero() line 189 in src/sys/utils/memc.c
[1]PETSC ERROR: PetscViewerASCIISynchronizedPrintf() line 859 in src/sys/viewer/impls/ascii/filev.c
[1]PETSC ERROR: ISView_Stride() line 231 in src/vec/is/impls/stride/stride.c
[1]PETSC ERROR: ISView() line 398 in src/vec/is/interface/index.c
[1]PETSC ERROR: main() line 31 in src/dm/ao/examples/tests/ex7.c
application called MPI_Abort(MPI_COMM_WORLD, 85) - process 1[cli_1]: aborting job:
application called MPI_Abort(MPI_COMM_WORLD, 85) - process 1
[0]0:Return code = 0, signaled with Interrupt
[0]1:Return code = 85
asterix:/home/balay/spetsc/src/dm/ao/examples/tests>




On Mon, 21 Jul 2008, Matthew Knepley wrote:

> I made this change because synchronized printing was cutting off my
> stuff. Now the queue is dynamically allocated so it can accomodate
> any size string.
> 
> I tried ex7 and it runs fine for me, even under valgrind.
> 
> Shi, can you reproduce this with a Sieve example?
> 
>   Matt
> 
> On Mon, Jul 21, 2008 at 2:37 PM, Satish Balay <balay at mcs.anl.gov> wrote:
> > Looks like this could be related to changeset 9e3fbe04a926
> >
> > --> mprint.h <--
> >
> > -  char        string[QUEUESTRINGSIZE];
> > +  char       *string;
> >
> > So now strings needs to use malloc()/free()?
> >
> > Matt - you can reproduce this issue with dm/ao/examples/tests/ex7.c
> >
> > Satish