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751300ec59
This is a follow up to PR https://github.com/Unidata/netcdf-c/pull/1173 Sorry that it is so big, but leak suppression can be complex. This PR fixes all remaining memory leaks -- as determined by -fsanitize=address, and with the exceptions noted below. Unfortunately. there remains a significant leak that I cannot solve. It involves vlens, and it is unclear if the leak is occurring in the netcdf-c library or the HDF5 library. I have added a check_PROGRAM to the ncdump directory to show the problem. The program is called tst_vlen_demo.c To exercise it, build the netcdf library with -fsanitize=address enabled. Then go into ncdump and do a "make clean check". This should build tst_vlen_demo without actually executing it. Then do the command "./tst_vlen_demo" to see the output of the memory checker. Note the the lost malloc is deep in the HDF5 library (in H5Tvlen.c). I am temporarily working around this error in the following way. 1. I modified several test scripts to not execute known vlen tests that fail as described above. 2. Added an environment variable called NC_VLEN_NOTEST. If set, then those specific tests are suppressed. This should mean that the --disable-utilities option to ./configure should not need to be set to get a memory leak clean build. This should allow for detection of any new leaks. Note: I used an environment variable rather than a ./configure option to control the vlen tests. This is because it is temporary (I hope) and because it is a bit tricky for shell scripts to access ./configure options. Finally, as before, this only been tested with netcdf-4 and hdf5 support.
56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
/*********************************************************************
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* Copyright 2010, UCAR/Unidata
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* See netcdf/COPYRIGHT file for copying and redistribution conditions.
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* $Id$
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* $Header$
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*********************************************************************/
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#ifndef NCAUX_H
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#define NCAUX_H
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#define NCAUX_ALIGN_C 0
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#define NCAUX_ALIGN_UNIFORM 1
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#if defined(__cplusplus)
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extern "C" {
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#endif
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/**
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Reclaim the output tree of data from a call
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to e.g. nc_get_vara or the input to e.g. nc_put_vara.
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This recursively walks the top-level instances to
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reclaim any nested data such as vlen or strings or such.
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Assumes it is passed a pointer to count instances of xtype.
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Reclaims any nested data.
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WARNING: does not reclaim the top-level memory because
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we do not know how it was allocated.
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Should work for any netcdf format.
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*/
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EXTERNL int ncaux_reclaim_data(int ncid, int xtype, void* memory, size_t count);
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EXTERNL int ncaux_begin_compound(int ncid, const char *name, int alignmode, void** tag);
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EXTERNL int ncaux_end_compound(void* tag, nc_type* typeid);
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EXTERNL int ncaux_abort_compound(void* tag);
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EXTERNL int ncaux_add_field(void* tag, const char *name, nc_type field_type,
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int ndims, const int* dimsizes);
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/* Takes any type */
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EXTERNL size_t ncaux_type_alignment(int xtype, int ncid);
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/* Takes type classes only */
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EXTERNL size_t ncaux_class_alignment(int ncclass);
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#if defined(__cplusplus)
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}
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#endif
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#endif /*NCAUX_H*/
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