Show backtrace on allocation failures when possible #148020
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And if an allocation while printing the backtrace fails, don't try to print another backtrace as that will never succeed.
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The Miri subtree was changed cc @rust-lang/miri |
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rustbot has assigned @Mark-Simulacrum. Use |
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library/std/src/alloc.rs
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| let mut lock = crate::sys::backtrace::lock(); | ||
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| match crate::panic::get_backtrace_style() { | ||
| // SAFETY: we took out a lock just a second ago. |
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It's not clear to me what this safety comment is on - I don't see any unsafe code here?
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BacktraceLock::print is incorrectly marked as safe. It and all callers should be marked unsafe. See 1c8f9bb?w=1#diff-1b221b9e32f6143fdd8a5505c8893377e8e9eb1ff47b988716343c7e70393b1bR40.
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Why is it not safe? The mere fact that you have a BacktraceLock (which you need to call print) means that no other thread can be printing a backtrace, right?
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oh, right. probably the safety comment should just be moved inside that function then?
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LGTM from the libs side @bors r=Mark-Simulacrum |
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…acrum Show backtrace on allocation failures when possible And if an allocation while printing the backtrace fails, don't try to print another backtrace as that will never succeed. Split out of rust-lang#147725 to allow landing this independently of a decision whether or not to remove `-Zoom=panic`.
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Rollup of 15 pull requests Successful merges: - #147404 (Fix issue with callsite inline attribute not being applied sometimes.) - #147534 (Implement SIMD funnel shifts in const-eval/Miri) - #147686 (update isolate_highest_one for NonZero<T>) - #148020 (Show backtrace on allocation failures when possible) - #148204 (Modify contributor email entries in .mailmap) - #148230 (rustdoc: Properly highlight shebang, frontmatter & weak keywords in source code pages and code blocks) - #148555 (Fix rust-by-example spanish translation) - #148556 (Fix suggestion for returning async closures) - #148585 ([rustdoc] Replace `print` methods with functions to improve code readability) - #148600 (re-use `self.get_all_attrs` result for pass indirectly attribute) - #148612 (Add note for identifier with attempted hygiene violation) - #148613 (Switch hexagon targets to rust-lld) - #148644 ([bootstrap] Make `--open` option work with `doc src/tools/error_index_generator`) - #148649 (don't completely reset `HeadUsages`) - #148675 (Remove eslint-js from npm dependencies) r? `@ghost` `@rustbot` modify labels: rollup
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…acrum Show backtrace on allocation failures when possible And if an allocation while printing the backtrace fails, don't try to print another backtrace as that will never succeed. Split out of rust-lang#147725 to allow landing this independently of a decision whether or not to remove `-Zoom=panic`.
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Rollup of 16 pull requests Successful merges: - #147534 (Implement SIMD funnel shifts in const-eval/Miri) - #147686 (update isolate_highest_one for NonZero<T>) - #148020 (Show backtrace on allocation failures when possible) - #148204 (Modify contributor email entries in .mailmap) - #148230 (rustdoc: Properly highlight shebang, frontmatter & weak keywords in source code pages and code blocks) - #148279 (rustc_builtin_macros: rename bench parameter to avoid collisions with user-defined function names) - #148555 (Fix rust-by-example spanish translation) - #148556 (Fix suggestion for returning async closures) - #148585 ([rustdoc] Replace `print` methods with functions to improve code readability) - #148600 (re-use `self.get_all_attrs` result for pass indirectly attribute) - #148612 (Add note for identifier with attempted hygiene violation) - #148613 (Switch hexagon targets to rust-lld) - #148619 (Enable std locking functions on AIX) - #148644 ([bootstrap] Make `--open` option work with `doc src/tools/error_index_generator`) - #148649 (don't completely reset `HeadUsages`) - #148675 (Remove eslint-js from npm dependencies) r? `@ghost` `@rustbot` modify labels: rollup
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Failed in rollup: #148686 (comment) @bors r- |
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And if an allocation while printing the backtrace fails, don't try to print another backtrace as that will never succeed.
Split out of #147725 to allow landing this independently of a decision whether or not to remove
-Zoom=panic.