undefined reference to '__csan_llvm_x86_sse2_pause'

[wheatman]

__csan_llvm_x86_sse2_pause seems to be missing for cilksan
I tried to add the compile flag

-mllvm -cilksan-bc-path=`find ~/opencilkv20/build/bin/clang++ -name "libcilksan.bc"

but that didn't fix it either

Adding the following to the code did work

#ifdef __cilksan__
#ifdef __cplusplus
extern "C" {
#endif
void __csan_default_libhook(uint64_t call_id, uint64_t func_id, unsigned count);
void __csan_llvm_x86_sse2_pause(uint64_t call_id, uint64_t func_id,
                                unsigned count) {
  __csan_default_libhook(call_id, func_id, count);
}
#ifdef __cplusplus
}
#endif
#endif

As requested reporting the missing symbol. Let me know if the source would be helpful

[neboat]

Thanks for the report.

Out of curiosity, concerning the -cilksan-bc-path flag, can you try changing that flag as follows?

-mllvm -cilksan-bc-path=`find ~/opencilkv20/build/ -name "libcilksan.bc"

In particular, remove bin/clang++ from the path given to find. Does it work if you use that modified flag (and don't add the code snippet)?

[wheatman]

Yes, that did also work