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When hacking on open-isns, or when trying to locate a problem,
the following information may be useful:
- You can start the daemon using the -f option, which
prevents it from backgrounding itself. Crucial if
you want to run it in a debugger, or under strace.
This option works for isnsd and isnsdd
- All tools support the "-d" option to enable debugging.
In general, you want to use "-d all" to turn on all
debugging options. However, you can select individual
debug facilities - check out the manpages and/or
the source code in logging.c
- If isnsd crashes, and you suspect memory corruption,
you can compile open-isns with memory debugging enabled. Re-run
the configure script and add the option --enable-memdebug. Then
run "make clean all" to rebuild everything.
Memory debugging can be chosen at run-time by setting the
ISNS_MDEBUG environment variable, and re-starting the application:
export ISNS_MDEBUG=1
./isnsd -f -d all
Memory debugging works for all memory allocations done by the
Open-iSNS code, but does not affect memory allocations by other
libraries (such as glibc or openssl).
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