From owner-freebsd-hackers@FreeBSD.ORG  Sun Feb 19 16:59:50 2006
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From: Andreas Bachmann <bachi@te-clan.ch>
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Date: Sun, 19 Feb 2006 17:59:47 +0100
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Subject: dladdr in executable and shared object
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Hello!

Want to have a runtime stacktrace like in a java environment.
Why will dladdr get an incorrect dli_fname, when I execute a
standalone (without shared object) program?
http://bachi.te-clan.ch/freebsd/i386-freebsd-backtrace.c
http://bachi.te-clan.ch/freebsd/i386-freebsd-backtrace.result

When I create a shared object and link it with a executable,
all functions in the shared object will be resolved, but all
other functions will get an incorrect result.
http://bachi.te-clan.ch/freebsd/i386-freebsd-backtrace-lib.c
http://bachi.te-clan.ch/freebsd/i386-freebsd-backtrace-load.c
http://bachi.te-clan.ch/freebsd/i386-freebsd-backtrace-lib.result

In solaris also standalone programs will get correct dli_fname...
http://bachi.te-clan.ch/freebsd/sparc-solaris-backtrace.c
http://bachi.te-clan.ch/freebsd/sparc-solaris-backtrace.result

I think the whole dynamic linking functions are buggy.
dlsym will also not work.
http://bachi.te-clan.ch/freebsd/i386-freebsd-dlsym.c
http://bachi.te-clan.ch/freebsd/i386-freebsd-dlsym.result

Is this a gap and will be implemented/fixed?
Are there other functions to translate addresses
to symbols on runtime?

greets

Andreas