lesson 08: no interesting inputs found

[juneJuly]

when i run xml_read_memory_fuzzer in lesson 08 , i got error like this:
'''
08$ ./xml_read_memory_fuzzer -max_total_time=300 -print_final_stats=1 corpus1
INFO: Seed: 1486712041
INFO: Loaded 0 modules (0 guards):
Loading corpus dir: corpus1
INFO: -max_len is not provided, using 64
INFO: A corpus is not provided, starting from an empty corpus
#0 READ units: 1
#1 INITED exec/s: 0 rss: 31Mb
ERROR: no interesting inputs were found. Is the code instrumented for coverage? Exiting.
'''

did i missed something?
any suggestion?

[quangnh89]

I think you should change FUZZ_CXXFLAGS a little bit. Lastest version of Clang supports trace-pc-guard flag. The compiler will insert instrumentation code on every edge. 8bit-counters and trace-pc-guard can not combine together.
Try it:

export FUZZ_CXXFLAGS="-O2 -fno-omit-frame-pointer -g -fsanitize=address \
    -fsanitize-coverage=edge,trace-pc-guard,indirect-calls,trace-cmp,trace-div,trace-gep"

[juneJuly]

@quangnh89
thank u very much , that works very well.
an u make everything clearly.

[Dor1s]

Thanks @quangnh89 !