not running under DR

[zhefox]

When I run my harness with drrun debug it works fine, but when I run fuzz with winafl it shows the following： process 37460 is not running under DR 0 processes nudged nudge operation failed, verify permissions and parameters.

drrun debug log: Module loaded, dynamorio.dll Module loaded, xxx.dll Module loaded, winafl.dll Module loaded, drx.dll Module loaded, drreg.dll Module loaded, drmgr.dll Module loaded, drwrap.dll Module loaded, harness.exe Module loaded, VERIFIER.dll Module loaded, VCOMP140.DLL Module loaded, VCRUNTIME140.dll Module loaded, ucrtbase.dll Module loaded, KERNELBASE.dll Module loaded, WS2_32.dll Module loaded, RPCRT4.dll Module loaded, KERNEL32.dll Module loaded, ntdll.dll In pre_fuzz_handler In OpenFileW, reading xxx In OpenFileW, reading xxx In post_fuzz_handler In pre_fuzz_handler In OpenFileW, reading xxx In OpenFileW, reading xxx In post_fuzz_handler

In post_fuzz_handler Everything appears to be running normally. Coverage map follows:

[zhefox]

I'll add to my command line arguments afl-fuzz.exe -i in -o out -m none -t 20000+ -D C:\Use rs\xxx\Desktop\fuzz\dymRIO\bin64\ -- -coverage_module xxx.dll -target_module harness.exe -target_offset 0x1130 -fuzz_iterations 2 -nargs 2 -- C:\Users\xxx\Deskt op\fuzz\harness.exe @@

[zhefox]

Furthermore, my program is running normally, and WinAFL is indeed fuzzing, as evidenced by the running interface. Upon inspection, I've confirmed that winafl.dll has successfully been instrumented into the target program.

[zhefox]

[zhefox]

Oh, I think I've just discovered an issue in my harness. There's a conditional judgment in the code that's causing the program's DLL to prematurely exit before reaching the end of the harness.