morehouse added inline comments.
================ Comment at: compiler-rt/test/fuzzer/custom-allocator.test:2 +UNSUPPORTED: freebsd +RUN: %cpp_compiler -fno-sanitize=all -fno-builtin %S/CustomAllocator.cpp -fPIC %ld_flags_rpath_so1 -O0 -shared -o %dynamiclib1 +RUN: %cpp_compiler -fno-sanitize=address %S/CustomAllocatorTest.cpp %ld_flags_rpath_exe1 -o %t-NoAsanCustomAllocatorTest ---------------- dokyungs wrote: > morehouse wrote: > > Why do we need each of these flags? > With all the flags, I designed this test for the recent failure scenario in > which tcmalloc calls strncmp (+memcmp/strstr) when the fuzzer interceptor > library is linked into the libFuzzer executable. > > As such, we need to turn off ASan (-fno-sanitize=address) when building the > executable to let the fuzzer interceptor library be linked. > > As to the flags used to build the allocator shared library, I wanted to > disable ASan and Fuzzer (via `-fno-sanitize=all`) because allocator libraries > are typically not instrumented for OOB/UAF errors or coverage. I also wanted > to prevent the compiler from optimizing out our calls to > strncmp(+memcmp/strstr) by giving `-fno-builtin`; calls to these functions > must go to the fuzzer interceptor library to comply with the scenario. Yes, those flags make sense. What about `-fPIC %ld_flags_rpath_so1 -O0 -shared`? Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D83494/new/ https://reviews.llvm.org/D83494 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
