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Matthias Krüger dafea5f919
Rollup merge of #113565 - workingjubilee:better-signal-handler-message, r=pnkfelix 
Make SIGSEGV handler emit nicer backtraces

This annotates the code heavily with comments to explain what is going on, for the benefit of other compiler contributors. The backtrace also emits appropriate comments to clarify, to a programmer who may not know why a bunch of file paths and hexadecimal blather was just dumped into stderr, what is going on. Finally, it detects cycles and uses their regularity to avoid repeating a bunch of text. The previous backtraces we were emitting was extremely unfriendly, potentially confusing, and often alarming, and this makes things almost "nice".

We can't necessarily make them much nicer than this, because a signal handler must use "signal-safe" functions. This precludes conveniences like dynamic allocations. Fortunately, Rust's stdlib has allocation-free formatting, but it may hinder integrating this error with our localization middleware, as I wasn't able to clearly ascertain, at a glance, whether there was a zero-alloc path through it.

r? `@Nilstrieb`
2023-08-30 07:18:10 +02:00
..
rustc inline format!() args up to and including rustc_middle 2023-07-30 13:18:33 +02:00
rustc_abi there seems to be no reason to treat ZST specially in these cases 2023-08-29 08:58:58 +02:00
rustc_arena Bump cfg(bootstrap) 2023-08-23 20:05:14 -04:00
rustc_ast Auto merge of #115131 - frank-king:feature/unnamed-fields-lite, r=petrochenkov 2023-08-24 12:52:35 +00:00
rustc_ast_lowering RPITITs capture all their lifetimes 2023-08-28 01:05:34 +00:00
rustc_ast_passes Auto merge of #115131 - frank-king:feature/unnamed-fields-lite, r=petrochenkov 2023-08-24 12:52:35 +00:00
rustc_ast_pretty Auto merge of #115131 - frank-king:feature/unnamed-fields-lite, r=petrochenkov 2023-08-24 12:52:35 +00:00
rustc_attr Auto merge of #114201 - Centri3:explicit-repr-rust, r=WaffleLapkin 2023-08-25 00:02:54 +00:00
rustc_baked_icu_data Regen baked data 2023-05-02 10:45:16 -07:00
rustc_borrowck Auto merge of #115045 - RalfJung:unwind-terminate-reason, r=davidtwco 2023-08-25 08:47:18 +00:00
rustc_builtin_macros Load include_bytes! directly into an Lrc 2023-08-27 20:16:19 -04:00
rustc_codegen_cranelift Rollup merge of #111580 - atsuzaki:layout-ice, r=oli-obk 2023-08-29 20:49:02 +02:00
rustc_codegen_gcc Rollup merge of #111580 - atsuzaki:layout-ice, r=oli-obk 2023-08-29 20:49:02 +02:00
rustc_codegen_llvm Rollup merge of #111580 - atsuzaki:layout-ice, r=oli-obk 2023-08-29 20:49:02 +02:00
rustc_codegen_ssa Auto merge of #114114 - keith:ks/always-add-lc_build_version-for-metadata-object-files, r=wesleywiser 2023-08-29 21:17:13 +00:00
rustc_const_eval const_eval and codegen: audit uses of is_zst 2023-08-29 09:03:46 +02:00
rustc_data_structures Auto merge of #114894 - Zoxc:sharded-cfg-cleanup2, r=cjgillot 2023-08-29 12:04:37 +00:00
rustc_driver Update rustix 2023-07-03 07:20:51 +00:00
rustc_driver_impl Rollup merge of #113565 - workingjubilee:better-signal-handler-message, r=pnkfelix 2023-08-30 07:18:10 +02:00
rustc_error_codes tell people what to do when removing an error code 2023-08-27 19:12:42 +02:00
rustc_error_messages Bump cfg(bootstrap) 2023-08-23 20:05:14 -04:00
rustc_errors Add comment to the push_trailing function 2023-08-24 17:09:14 -04:00
rustc_expand Bump cfg(bootstrap) 2023-08-23 20:05:14 -04:00
rustc_feature Test variances of opaque captures 2023-08-28 01:05:34 +00:00
rustc_fluent_macro Fix diagnostics with errors 2023-05-26 10:44:18 +00:00
rustc_fs_util Add try_canonicalize to rustc_fs_util and use it over fs::canonicalize 2023-03-16 21:50:23 +01:00
rustc_graphviz enable rust_2018_idioms for doctests 2023-05-07 00:12:29 +03:00
rustc_hir Auto merge of #115045 - RalfJung:unwind-terminate-reason, r=davidtwco 2023-08-25 08:47:18 +00:00
rustc_hir_analysis some more is_zst that should be is_1zst 2023-08-29 14:11:27 +02:00
rustc_hir_pretty Auto merge of #114545 - fee1-dead-contrib:lower-impl-effect, r=oli-obk 2023-08-08 19:23:41 +00:00
rustc_hir_typeck Account for Weak alias kinds when adding more targetted obligation 2023-08-26 20:10:19 +00:00
rustc_incremental Ignore unexpected incr-comp session dirs 2023-08-18 19:57:41 +02:00
rustc_index Auto merge of #115094 - Mark-Simulacrum:bootstrap-update, r=ozkanonur 2023-08-24 11:10:52 +00:00
rustc_infer Merge if and match expressions that don't make sense to have separated 2023-08-26 13:37:43 -03:00
rustc_interface Auto merge of #115267 - nikic:revert-elf-relaxation, r=compiler-errors 2023-08-28 03:30:37 +00:00
rustc_lexer Update lexer emoji diagnostics to Unicode 15.0 2023-07-29 08:47:21 +08:00
rustc_lint some more is_zst that should be is_1zst 2023-08-29 14:11:27 +02:00
rustc_lint_defs Auto merge of #115104 - compiler-errors:rollup-8235xz5, r=compiler-errors 2023-08-22 16:16:32 +00:00
rustc_llvm Auto merge of #115079 - cuviper:unused-mcinfo, r=Mark-Simulacrum 2023-08-27 10:32:24 +00:00
rustc_log inline format!() args up to and including rustc_middle 2023-07-30 13:18:33 +02:00
rustc_macros Bump cfg(bootstrap) 2023-08-23 20:05:14 -04:00
rustc_metadata Auto merge of #113542 - saethlin:adaptive-tables, r=b-naber 2023-08-30 02:40:37 +00:00
rustc_middle Rollup merge of #111580 - atsuzaki:layout-ice, r=oli-obk 2023-08-29 20:49:02 +02:00
rustc_mir_build Auto merge of #115045 - RalfJung:unwind-terminate-reason, r=davidtwco 2023-08-25 08:47:18 +00:00
rustc_mir_dataflow when terminating during unwinding, show the reason why 2023-08-24 13:28:26 +02:00
rustc_mir_transform Auto merge of #115138 - cjgillot:dse-move-packed, r=compiler-errors 2023-08-25 13:27:21 +00:00
rustc_monomorphize Auto merge of #114774 - Enselic:less-move-size-noise, r=oli-obk 2023-08-28 13:36:19 +00:00
rustc_parse Auto merge of #115131 - frank-king:feature/unnamed-fields-lite, r=petrochenkov 2023-08-24 12:52:35 +00:00
rustc_parse_format Fix unit tests 2023-07-19 16:37:09 +00:00
rustc_passes add rustc_abi debugging attribute 2023-08-27 11:55:49 +02:00
rustc_plugin_impl Add rustc_fluent_macro to decouple fluent from rustc_macros 2023-04-18 18:56:22 +00:00
rustc_privacy Use {Local}ModDefId in many queries 2023-08-14 07:22:48 +00:00
rustc_query_impl Pass ErrorGuaranteed to cycle error 2023-08-27 22:03:00 +00:00
rustc_query_system Auto merge of #114894 - Zoxc:sharded-cfg-cleanup2, r=cjgillot 2023-08-29 12:04:37 +00:00
rustc_resolve RPITITs capture all their lifetimes 2023-08-28 01:05:34 +00:00
rustc_serialize Upgrade to indexmap 2.0.0 2023-07-03 13:51:54 -07:00
rustc_session Rollup merge of #114974 - nbdd0121:vtable, r=b-naber 2023-08-27 20:12:47 +02:00
rustc_smir Rollup merge of #115300 - spastorino:smir-tweaks, r=oli-obk 2023-08-29 20:49:05 +02:00
rustc_span Auto merge of #114489 - compiler-errors:rpitit-capture-all, r=oli-obk 2023-08-28 18:05:16 +00:00
rustc_symbol_mangling Fix CFI: f32 and f64 are encoded incorrectly for c 2023-08-24 21:02:06 -07:00
rustc_target Auto merge of #114114 - keith:ks/always-add-lc_build_version-for-metadata-object-files, r=wesleywiser 2023-08-29 21:17:13 +00:00
rustc_trait_selection Auto merge of #115326 - matthiaskrgr:rollup-qsoa8ar, r=matthiaskrgr 2023-08-28 19:57:32 +00:00
rustc_traits refactor(rustc_middle): Substs -> GenericArg 2023-07-14 13:27:35 +01:00
rustc_transmute Don't attempt to compute layout of type referencing error 2023-07-27 18:24:08 +00:00
rustc_ty_utils some more is_zst that should be is_1zst 2023-08-29 14:11:27 +02:00
rustc_type_ir Bump cfg(bootstrap) 2023-08-23 20:05:14 -04:00