Exploits may not be found when standard string functions (string.h) are used about avalanche HOT 1 CLOSED

Avalanche fails to find an exploit for given source code because of the call to 
fputs  (string_test.c:28). Calling fputs leads to subsequent call to strlen.

In-depth analysis of avalanche work on string_test.c showed that strlen and 
other string functions cause tracegrind to generate incorrect STP declarations. 
Further investigation showed that this happens due to heavy optimization used 
in glibc strlen (and other string functions) implementation.
Several other valgrind tools (memcheck, drd) are also affected by this issue. 
For these tools the problem is solved by the replacement mechanism provided by 
valgrind core (see 
http://code.google.com/p/avalanche/source/browse/trunk/valgrind/memcheck/mc_repl
ace_strmem.c).

The corresponding replacements for string.h functions were added to tracegrind 
in revision 209 (see 
http://code.google.com/p/avalanche/source/browse/trunk/valgrind/tracegrind/tg_re
place_strmem.c) and fixed this issue.