libFuzzer on windows

[Sujata Das]

Hi,

 

I am trying to build and run libFuzzer based fuzzers that run on Ubuntu on Windows.

- On Ubuntu, I am using clang-11. I can build and run the fuzzers successfully.

- On Windows 10, I have VS 2019 installed with ASAN Sanitizer and CLang enabled. Build succeeds on Windows, but when I run the fuzzer, I get the following error message:

==9800==AddressSanitizer CHECK failed: C:\src\llvm_package_1100-final\llvm-project\compiler-rt\lib\asan\asan_rtl.cpp:401 "((!asan_init_is_running && "ASan init calls itself!")) != (0)" (0x0, 0x0)

    <empty stack>

This issue is systemic and not related to any specific fuzzer.

 

Any idea what could be wrong with my Windows environment and how that can be fixed?

 

Thanks,
Sujata Das

[Jonathan Metzman]

I don't know how this is happening. It might be a good idea to reach out to visual studio as not many of us here at Google are windows experts.

If you could give me a reproducer, it would might help.

1. Is this issue caused when using clang-cl or visual studio's c++ compiler.

2. I suspect this issue doesn't have to do with libFuzzer and is ASAN-specific (in which case we may need to put you in touch with the ASAN on Windows experts).

Could you add a main function that passes an offending testcase to LLVMFuzzerTestOneInput and see if the issue persists? If so then it is just an ASAN issue.

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