ce3f9039d9
miri genmc: fix exit() handling In genmc mode, Miri does not want to stop execution when `exit` is called. Instead we want to continue running other threads to ensure we covered all possible concurrent behaviors (including the ones where the exiting thread was delayed so the other threads took their turns first). However, the core interpreter has a sanity check that prevents us from just doing nothing in `exit`. This leaves us in a pickle: there's nowhere we can jump to (exit has return type `!` so there's no next block), but if we don't jump anywhere we ICE. The first commit fixes that by disabling the sanity check when there is no block to jump to. That still catches the mistake of forgetting to jump for the vast majority of shims. We currently don't build Miri's genmc integration in rustc CI so I had to hack the feature into the bootstrap miri integration. That turned out to use the wrong Miri binary, which is fixed by the second commit: we can just rely on CARGO_BIN_EXE_miri, there's no need for a MIRI environment variable. r? ``@oli-obk`` |
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