Suggest `RUST_MIN_STACK` workaround on overflow #122847

workingjubilee · 2024-03-21T21:49:44Z

For some Rust crates, like p384, we can't do a whole lot about it even if the stack overflow is reported like in #122357 because the problem may be inside LLVM or another codegen backend. We can, however, suggest people set a new RUST_MIN_STACK value while handling the SIGSEGV, as that stack-setting will carry forward into the dylib.

As a bonus, this also leads to cleaning up the stack-setting code a bit.

rustbot · 2024-03-21T21:49:51Z

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TaKO8Ki · 2024-03-22T05:38:17Z

@bors r+ rollup

bors · 2024-03-22T05:38:19Z

📌 Commit 5425338 has been approved by TaKO8Ki

It is now in the queue for this repository.

…ack-workaround-on-overflow, r=TaKO8Ki Suggest `RUST_MIN_STACK` workaround on overflow For some Rust crates, like p384, we can't do a whole lot about it even if the stack overflow is reported like in rust-lang#122357 because the problem may be inside LLVM or another codegen backend. We can, however, suggest people set a new `RUST_MIN_STACK` value while handling the SIGSEGV, as that stack-setting will carry forward into the dylib. As a bonus, this also leads to cleaning up the stack-setting code a bit.

…iaskrgr Rollup of 9 pull requests Successful merges: - rust-lang#121619 (Experimental feature postfix match) - rust-lang#122370 (Gracefully handle `AnonConst` in `diagnostic_hir_wf_check()`) - rust-lang#122537 (interpret/allocation: fix aliasing issue in interpreter and refactor getters a bit) - rust-lang#122542 (coverage: Clean up marker statements that aren't needed later) - rust-lang#122800 (Add `NonNull::<[T]>::is_empty`.) - rust-lang#122820 (Stop using `<DefId as Ord>` in various diagnostic situations) - rust-lang#122847 (Suggest `RUST_MIN_STACK` workaround on overflow) - rust-lang#122855 (Fix Itanium mangling usizes) - rust-lang#122863 (add more ice tests ) r? `@ghost` `@rustbot` modify labels: rollup

Rollup merge of rust-lang#122847 - workingjubilee:suggest-rust-min-stack-workaround-on-overflow, r=TaKO8Ki Suggest `RUST_MIN_STACK` workaround on overflow For some Rust crates, like p384, we can't do a whole lot about it even if the stack overflow is reported like in rust-lang#122357 because the problem may be inside LLVM or another codegen backend. We can, however, suggest people set a new `RUST_MIN_STACK` value while handling the SIGSEGV, as that stack-setting will carry forward into the dylib. As a bonus, this also leads to cleaning up the stack-setting code a bit.

…iaskrgr Rollup of 9 pull requests Successful merges: - rust-lang#121619 (Experimental feature postfix match) - rust-lang#122370 (Gracefully handle `AnonConst` in `diagnostic_hir_wf_check()`) - rust-lang#122537 (interpret/allocation: fix aliasing issue in interpreter and refactor getters a bit) - rust-lang#122542 (coverage: Clean up marker statements that aren't needed later) - rust-lang#122800 (Add `NonNull::<[T]>::is_empty`.) - rust-lang#122820 (Stop using `<DefId as Ord>` in various diagnostic situations) - rust-lang#122847 (Suggest `RUST_MIN_STACK` workaround on overflow) - rust-lang#122855 (Fix Itanium mangling usizes) - rust-lang#122863 (add more ice tests ) r? `@ghost` `@rustbot` modify labels: rollup

danielhenrymantilla · 2024-04-12T10:14:04Z

compiler/rustc_interface/src/util.rs

+        env::var_os("RUST_MIN_STACK")
+            .map(|os_str| os_str.to_string_lossy().into_owned())


To avoid the into_owned() cloning:

Suggested change

env::var_os("RUST_MIN_STACK")

.map(|os_str| os_str.to_string_lossy().into_owned())

env::var_os("RUST_MIN_STACK")

.as_ref()

.map(|os_str| os_str.to_string_lossy())

danielhenrymantilla · 2024-04-12T10:16:35Z

compiler/rustc_interface/src/util.rs

+            .filter(|s| s.trim() != "")
+            .map(|s| s.trim().parse::<usize>().unwrap())


Do we want to .unwrap() here? The UX on a bad RUST_MIN_STACK wouldn't be great. Given the usage of .filter() and .unwrap_or() outside of this, does it mean we want to silently ignore bad values (e.g., RUST_MIN_STACK=" ")?

Suggested change

.filter(|s| s.trim() != "")

.map(|s| s.trim().parse::<usize>().unwrap())

.and_then(|s| s.trim().parse::<usize>().ok())

or, if we don't want to silently ignore the erroneous value:

Suggested change

.filter(|s| s.trim() != "")

.map(|s| s.trim().parse::<usize>().unwrap())

.map(|s| s.trim().parse::<usize>().expect("`RUST_MIN_STACK` env var to be a `usize`))

thread 'main' panicked at compiler/rustc_interface/src/util.rs:61:48:
called Result::unwrap() on an Err value: ParseIntError { kind: InvalidDigit }

Huh, I thought for some reason it'd look better than that.

danielhenrymantilla · 2024-04-12T10:27:32Z

Whoops didn't see the PR was already merged 😆

…t, r=compiler-errors defrost `RUST_MIN_STACK=ice rustc hello.rs` I didn't think too hard about testing my previous PR rust-lang#122847 which makes our stack overflow handler assist people in discovering the `RUST_MIN_STACK` variable (which apparently is surprisingly useful for Really Big codebases). After it was merged, some useful comments left in a drive-by review led me to discover I had added an ICE. This reworks the code a bit to explain the rationale, remove the ICE that I introduced, and properly test one of the diagnostics.

Rollup merge of rust-lang#125302 - workingjubilee:prefer-my-stack-neat, r=compiler-errors defrost `RUST_MIN_STACK=ice rustc hello.rs` I didn't think too hard about testing my previous PR rust-lang#122847 which makes our stack overflow handler assist people in discovering the `RUST_MIN_STACK` variable (which apparently is surprisingly useful for Really Big codebases). After it was merged, some useful comments left in a drive-by review led me to discover I had added an ICE. This reworks the code a bit to explain the rationale, remove the ICE that I introduced, and properly test one of the diagnostics.

workingjubilee added 2 commits March 21, 2024 14:47

Use less hacky STACK_SIZE

60891ca

Suggest using RUST_MIN_STACK if rustc overflowed

5425338

rustbot assigned TaKO8Ki Mar 21, 2024

rustbot added S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. labels Mar 21, 2024

bors added S-waiting-on-bors Status: Waiting on bors to run and complete tests. Bors will change the label on completion. and removed S-waiting-on-review Status: Awaiting review from the assignee but also interested parties. labels Mar 22, 2024

matthiaskrgr mentioned this pull request Mar 22, 2024

Rollup of 8 pull requests #122866

Closed

This was referenced Mar 22, 2024

Rollup of 7 pull requests #122867

Closed

Rollup of 9 pull requests #122869

Merged

bors merged commit b317cda into rust-lang:master Mar 22, 2024

rustbot added this to the 1.79.0 milestone Mar 22, 2024

workingjubilee deleted the suggest-rust-min-stack-workaround-on-overflow branch March 22, 2024 17:23

This was referenced Mar 26, 2024

Resize gravitational/teleport#39819

Merged

Updates RUST_VERSION and bumps IronRDP rev to latest, adding RUST_MIN_STACK to fix ARM builds gravitational/teleport#39895

Merged

danielhenrymantilla reviewed Apr 12, 2024

View reviewed changes

workingjubilee mentioned this pull request May 20, 2024

defrost RUST_MIN_STACK=ice rustc hello.rs #125302

Merged

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Suggest `RUST_MIN_STACK` workaround on overflow #122847

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		env::var_os("RUST_MIN_STACK")
		.map(\|os_str\| os_str.to_string_lossy().into_owned())

		.filter(\|s\| s.trim() != "")
		.map(\|s\| s.trim().parse::<usize>().unwrap())

	.filter(\|s\| s.trim() != "")
	.map(\|s\| s.trim().parse::<usize>().unwrap())
	.and_then(\|s\| s.trim().parse::<usize>().ok())

	.filter(\|s\| s.trim() != "")
	.map(\|s\| s.trim().parse::<usize>().unwrap())
	.map(\|s\| s.trim().parse::<usize>().expect("`RUST_MIN_STACK` env var to be a `usize`))

Suggest RUST_MIN_STACK workaround on overflow #122847

Suggest RUST_MIN_STACK workaround on overflow #122847

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Suggest `RUST_MIN_STACK` workaround on overflow #122847

Suggest `RUST_MIN_STACK` workaround on overflow #122847