Hi -
> I am trying to implement a library which substitutes libc (using
> LD_PRELOAD), in order to be able to inject errors into programs
> under test making standard library calls (e.g. fopen, malloc,
> etc.). I would like to log the backtrace when such a call is made,
> to see the execution path which lead to the error. [...]
(We're not quite there yet, but this sort of thing will be pretty
easy to express with systemtap, as in ...)
# inject a fault
probe process("/lib/libc.so.6").function("fread_unlocked").return { $fp->_flags
|= 4 }
# print the backtrace
probe process("/lib/libc.so.6").function("fclose") { print_backtrace() }
- FChE
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