Sorry for all the bad news lately, but in responding to a query from
an nco
user, we've also found a big mem leak in the DODS client lib.
Attached is
the output from a valgrind memcheck of the ncrcat accessing the files
via
DODS. Using the files /locally/ shows no mem leaks. The guilty code
appears
to be here:
(extract of attached message)
==19478== 8129824 bytes in 73 blocks are definitely lost in loss
record 140 of
141
==19478== at 0x1B906985: operator new[](unsigned)
(vg_replace_malloc.c:138)
==19478== by 0x1B9DE4AC: Vector::buf2val(void**) (Vector.cc:711)
==19478== by 0x1B979DCA: DODvario(int, int, unsigned const*,
unsigned
const*, int const*, void*, int) (Dputget.cc:428)
==19478== by 0x1B97E51B: nc_get_vara_double (Dputget.cc:1907)
==19478== by 0x1B954B41: nco_get_vara (nco_netcdf.c:664)
==19478== by 0x1B965208: nco_var_val_cpy (nco_var_utl.c:1015)
==19478== by 0x804A436: main (ncra.c:460)
==19478==
==19478==
==19478== 94633984 bytes in 40 blocks are possibly lost in loss record
141 of
141
==19478== at 0x1B906985: operator new[](unsigned)
(vg_replace_malloc.c:138)
==19478== by 0x1B9DE4AC: Vector::buf2val(void**) (Vector.cc:711)
==19478== by 0x1B979DCA: DODvario(int, int, unsigned const*,
unsigned
const*, int const*, void*, int) (Dputget.cc:428)
==19478== by 0x1B97E43B: nc_get_vara_float (Dputget.cc:1890)
==19478== by 0x1B954BDC: nco_get_vara (nco_netcdf.c:663)
==19478== by 0x1B964676: nco_var_get (nco_var_utl.c:613)
==19478== by 0x804A630: main (ncra.c:518)
I say 'appears to be' b/c I had to kill the job and so the process
terminated
abnormally, but valgrind is pretty good about detecting mem gone
astray. If
you need a complete run, I can re-run with smaller input, but you
probably
have better tools there.
Charlie's response to the initial query describing the problem is here:
https://sourceforge.net/forum/message.php?msg_id=3135195
I verified the problem on 2 other Intel PIII platforms and one dual
Opteron
(64bit mode), all running variants of Debian unstable, all with
gcc/g++ 3.4.4
Harry
<valgrind.ncrcat.output.bz2>
