[LLVMdev] libFuzzer newbie question

[Kostya Serebryany]

I hope I've replied in another related thread.

On Thu, Jul 9, 2015 at 6:20 PM, Chandler Carruth <chandlerc at google.com>
wrote:

> Explicitly CC-ing Kostya...
>
> On Sat, Jul 4, 2015 at 1:30 PM Juan Ceasar <juan.d.ceasar at gmail.com>
> wrote:
>
>> So I was curious to start using the libFuzzer, but trying to follow along
>> I got the following error:
>>
>> clang++ -fsanitize=address -fsanitize-coverage=edge test_fuzzer.cc
>> Fuzzer*.o
>>
>> Undefined symbols for architecture x86_64:
>>
>>   "_dfsan_create_label", referenced from:
>>
>>       fuzzer::TraceState::DFSanCmpCallback(unsigned long, unsigned long,
>> unsigned long, unsigned long long, unsigned long long, unsigned short,
>> unsigned short) in FuzzerTraceState.o
>>
>>       fuzzer::Fuzzer::InitializeTraceState() in FuzzerTraceState.o
>>
>>   "_dfsan_get_label_info", referenced from:
>>
>>       fuzzer::TraceState::GetLabelRange(unsigned short) in
>> FuzzerTraceState.o
>>
>>   "_dfsan_read_label", referenced from:
>>
>>       _dfsan_weak_hook_memcmp in FuzzerTraceState.o
>>
>>   "_dfsan_set_label", referenced from:
>>
>>       fuzzer::Fuzzer::InitializeTraceState() in FuzzerTraceState.o
>>
>> ld: symbol(s) not found for architecture x86_64
>>
>> clang-3.7: error: linker command failed with exit code 1 (use -v to see
>> invocation)
>>
>>
>>
>>
>> Any hints as to what I'm doing wrong?  Thanks
>>
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>>
>
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