Hi Andrew,
On Oct 8, 2011, at 2:43 PM, Andrew Collette wrote:
> Hi,
>
> I had a user recently report crash when using the CORE file driver
> with backing store, with HDF5 1.8.7 on OS X (10.6). The Python
> snippet used to create the file was:
>
> import h5py
> import numpy as np
>
> bs = 1024 * 1024
> f = h5py.File('myfile.hdf5', driver='core', backing_store=True)
> for ct in range(2000):
> print ct
> dset = f.create_dataset("MyDataset%d" % ct, (bs ,), 'd')
> dset[...] = np.random.uniform(0, 1, (bs,))
>
> resulting in:
>
> Program received signal EXC_BAD_ACCESS, Could not access memory.
> Reason: KERN_INVALID_ADDRESS at address: 0x000000000000052c
> 0x00000001004de76e in H5F_close (f=0x1014d8e20) at H5F.c:1754
> 1754 if(f->shared->fc_degree == H5F_CLOSE_SEMI) {
> (gdb) where
> #0 0x00000001004de76e in H5F_close (f=0x1014d8e20) at H5F.c:1754
> #1 0x0000000100538e6b in H5I_clear_type (type=<value temporarily
> unavailable, due to optimizations>, force=0, app_ref=0) at H5I.c:599
>
> (gdb) p f
> $1 = (H5F_t *) 0x1014d8e20
> (gdb) p f->shared
> $2 = (H5F_file_t *) 0x0
> (gdb)
>
> I've been over the Python side and can't find anything obviously wrong
> in h5py. Unfortunately I am also having problems reproducing it on my
> setup. Have there been any reports of problems when closing CORE
> files?
Hmm, nothing that I can recall with the CORE driver... Can you
duplicate something in C?
Quincey
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