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.
that were not taking the CDF-5 format into account.
2. Had to update ncgen.1 man page to define the new
k-flag rules to deal with cdf-5.
3. Had to fix some tests that use 'cmp' for comparison;
this really should be deprecated.
3. There was a bug in configure.ac with respect
to using the enable-netcdf-4 flag vs
using disable-netcdf-4.
The code for handling character constants
in datalists in ncgen has some problems.
1. It failed on large constants
2. It did not handle e.g. var = 'a', 'b', ...
in the same way that ncgen3 did.
3. The code for generate.c and genchar.c needed
some refactoring to make it a little simpler
(but not simple).
1. Updated the ncgen manual (ncgen.1)
to discuss handling of ambiguous
enumeration constant references.
2. Fixed the test case. It is currently
XFAIL'd until such time as ncdump
is modified to output properly
disambiguated enumeration constant
references.
- Fix NCF-157 to modify DAP code to support
partial variable retrieval.
- Fix of NCF-154 to solve problem of ncgen
improperly processing data lists for variables
of size greater than 2**18 bytes.
- Fix ncgen processing of char variables that have
multiple unlimited dimensions.
- Partly fix Jira issue: NCF-145 (vlen issues).
- Benchmark program nc_test4/tst_ar4_*) requires arguments
and should only be invoked inside a shell
script; fixed so that they terminate cleanly
if invoked with no arguments.
- Fix the Doxygen processing so it will work
with make distcheck.
- Begin switchover to using an alternative to ncio.
- Begin support for in-memory (diskless) files.
