ORC JIT reports "JIT session error: Could not register findDynamicUnwindSections"

weiweic · November 1, 2023, 4:11am

Newbie to ORC JIT. I’m wondering where shall I start to poke about this error? Git grepping “JIT session error” or “Could not register” don’t seem to yield much obvious locations to investigate further. Any hints/leads are appreciated!!

weiweic · November 1, 2023, 4:55am

Actually found the code where this comes from:

github.com

llvm/llvm-project/blob/237d5c646991b57aacd60b23b3dab509eca9e1aa/compiler-rt/lib/orc/macho_platform.cpp#L399


      
          Error MachOPlatformRuntimeState::initialize() {
            UseCallbackStyleUnwindInfo = __unw_add_find_dynamic_unwind_sections &&
                                         __unw_remove_find_dynamic_unwind_sections;
            if (UseCallbackStyleUnwindInfo) {
              ORC_RT_DEBUG({
                printdbg("__unw_add/remove_find_dynamic_unwind_sections available."
                         " Using callback-based frame info lookup.\n");
              });
              if (__unw_add_find_dynamic_unwind_sections(&findDynamicUnwindSections))
                return make_error<StringError>(
                    "Could not register findDynamicUnwindSections");
            } else {
              ORC_RT_DEBUG({
                printdbg("__unw_add/remove_find_dynamic_unwind_sections not available."
                         " Using classic frame info registration.\n");
              });
            }
            return Error::success();
          }
          
          Error MachOPlatformRuntimeState::shutdown() {

We seem to only have this problem on MacOS14, but not on MacOS13. This is odd.