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...ariable since there's no reason to the fuzzer needs to be reentrant. However I have run into a problem I'm stumped on. I'm not sure if it's the dynamic linker or something in Postgres that's interfering with the coverage feedback but it's exiting after one call thinking the newcoverage isn't increasing over the previous coverage. The test that causing it to exit is at FuzzerLoop.cpp:250 if (NewCoverage > OldCoverage || NumNewBits) return NewCoverage; 250 if (NewCoverage > OldCoverage || NumNewBits) (gdb) p NewCoverage $3 = 14422 (gdb) p OldCoverage $4 = 14422...

I'm fairly sure your compiler (or rather linker) errors are coming from the fact that you are not linking to the C++ runtime library. Use `clang++ -std=c++11 *.o`, and I'm reasonably sure it will do what you want. -- Mats On 3 September 2015 at 12:26, Greg Stark via llvm-dev < llvm-dev at lists.llvm.org> wrote: > On Sun, Aug 30, 2015 at 3:30 PM, Greg Stark <stark at