interpret: do not call machine read hooks during validation #122249
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Some changes occurred to the CTFE / Miri engine cc @rust-lang/miri The Miri subtree was changed cc @rust-lang/miri |
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RalfJung
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Mar 9, 2024
| // Temporarily allow access to the static_root_alloc_id for the purpose of validation. | ||
| let static_root_alloc_id = ecx.machine.static_root_alloc_id.take(); | ||
| let validation = const_validate_mplace(&ecx, &mplace, cid); | ||
| ecx.machine.static_root_alloc_id = static_root_alloc_id; |
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I am a bit torn about whether before_alloc_read should be suppressed during validation. OTOH it is nice that we can now remove this code here. On the other hand, now if validation does do a read from this static, it will see Uninit and show a surprising error rather than triggering a cycle error. I don't know if it is even possible to do that, it would require a copy_op_transmute from the static to somewhere else.
If validation passes, we'll still get the cycle error from the actual read part of copy_op.
RalfJung
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Mar 9, 2024
| @@ -0,0 +1,28 @@ | |||
| #![feature(start)] | |||
| #![no_std] | |||
| //@compile-flags: -Zmiri-track-alloc-id=17 -Zmiri-track-alloc-accesses -Cpanic=abort | |||
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As an isolated no_std test, I think the alloc IDs here should be fully stable.
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Damn, somehow it is different on macOS... I guess I'll have to add some only-target.
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RalfJung
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Mar 11, 2024
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@bors r+ I can explore my ideas in separate PRs |
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interpret: do not call machine read hooks during validation Fixes rust-lang/miri#3347 r? `@oli-obk`
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…kingjubilee Rollup of 15 pull requests Successful merges: - rust-lang#116791 (Allow codegen backends to opt-out of parallel codegen) - rust-lang#116793 (Allow targets to override default codegen backend) - rust-lang#117458 (LLVM Bitcode Linker: A self contained linker for nvptx and other targets) - rust-lang#119385 (Fix type resolution of associated const equality bounds (take 2)) - rust-lang#121438 (std support for wasm32 panic=unwind) - rust-lang#121893 (Add tests (and a bit of cleanup) for interior mut handling in promotion and const-checking) - rust-lang#122080 (Clarity improvements to `DropTree`) - rust-lang#122152 (Improve diagnostics for parenthesized type arguments) - rust-lang#122166 (Remove the unused `field_remapping` field from `TypeLowering`) - rust-lang#122249 (interpret: do not call machine read hooks during validation) - rust-lang#122299 (Store backtrace for `must_produce_diag`) - rust-lang#122318 (Revision-related tweaks for next-solver tests) - rust-lang#122320 (Use ptradd for vtable indexing) - rust-lang#122328 (unix_sigpipe: Replace `inherit` with `sig_dfl` in syntax tests) - rust-lang#122330 (bootstrap readme: fix, improve, update) r? `@ghost` `@rustbot` modify labels: rollup
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Rollup merge of rust-lang#122249 - RalfJung:machine-read-hook, r=oli-obk interpret: do not call machine read hooks during validation Fixes rust-lang/miri#3347 r? ``@oli-obk``
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Fixes rust-lang/miri#3347
r? @oli-obk