Some sanitizers need to be target modifiers, and some do not. For now, we should mark all sanitizers as target modifiers except for these: AddressSanitizer, LeakSanitizer

For kCFI, the helper flag -Zsanitizer-cfi-normalize-integers should also be a target modifier. Same applies to #138311 when it lands.

The shadow-call-stack sanitizer is currently being considered as a target modifier for simplicity. However, there are cases where it does not need to be a target modifier.

Please see the target modifiers tracking issue for more details. See also the Tracking Issue for stabilizing the sanitizers.

cc @rcvalle @azhogin @maurer
@rustbot label F-target_modifiers A-sanitizers