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3fc5ed8067
rust/compiler
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Guillaume Yziquel 3fc5ed8067 Issue 122262: MAP_PRIVATE for more reliability on virtualised filesystems. 
Adding support of quirky filesystems occuring in virtualised settings not
having full POSIX support for memory mapped files. Example: current virtiofs
with cache disabled, occuring in Incus/LXD or Kata Containers. Has been
hitting various virtualised filesystems since 2016, depending on their levels
of maturity at the time. The situation will perhaps improve when virtiofs DAX
support patches will have made it into the qemu mainline.

On a reliability level, using the MAP_PRIVATE sycall flag instead of the
MAP_SHARED syscall flag for the mmap() system call does have some undefined
behaviour when the caller update the memory mapping of the mmap()ed file, but
MAP_SHARED does allow not only the calling process but other processes to
modify the memory mapping. Thus, in the current context, using MAP_PRIVATE
copy-on-write is marginally more reliable than MAP_SHARED.

This discussion of reliability is orthogonal to the type system enforced safety
policy of rust, which does not claim to handle memory modification of memory
mapped files triggered through the operating system and not the running rust
process.
2024-03-15 18:31:07 -04:00
..
rustc
rustc_abi Rollup merge of #121382 - nnethercote:rework-untranslatable_diagnostic-lint, r=davidtwco 2024-03-06 22:02:46 +01:00
rustc_arena rename ptr::invalid -> ptr::without_provenance 2024-02-21 20:15:52 +01:00
rustc_ast Rollup merge of #119365 - nbdd0121:asm-goto, r=Amanieu 2024-03-08 08:19:17 +01:00
rustc_ast_ir Fix typo in VisitorResult 2024-03-08 23:20:29 -05:00
rustc_ast_lowering Change DefKind::Static to a struct variant 2024-03-12 05:53:46 +00:00
rustc_ast_passes Rename AddToDiagnostic as Subdiagnostic. 2024-03-11 10:04:49 +11:00
rustc_ast_pretty Rollup merge of #121584 - klensy:itertools-up, r=Mark-Simulacrum 2024-03-09 21:40:08 +01:00
rustc_attr Rename IntoDiagnostic as Diagnostic. 2024-03-11 09:15:09 +11:00
rustc_baked_icu_data
rustc_borrowck Eliminate DefiningAnchor::Error, it is indistinguishable from DefiningAnchor::Bind with an empty list 2024-03-11 17:19:37 +00:00
rustc_builtin_macros Rename AddToDiagnostic as Subdiagnostic. 2024-03-11 10:04:49 +11:00
rustc_codegen_cranelift Rollup merge of #121840 - oli-obk:freeze, r=dtolnay 2024-03-11 03:47:19 -04:00
rustc_codegen_gcc Some comment nits 2024-03-12 08:51:20 +00:00
rustc_codegen_llvm Auto merge of #122220 - saethlin:ppc-can-into-atomicptr, r=oli-obk 2024-03-13 00:03:50 +00:00
rustc_codegen_ssa Auto merge of #121421 - saethlin:smarter-mono, r=oli-obk 2024-03-13 05:07:26 +00:00
rustc_const_eval Exhaustively match on the mutability and nestedness 2024-03-12 05:53:47 +00:00
rustc_data_structures Issue 122262: MAP_PRIVATE for more reliability on virtualised filesystems. 2024-03-15 18:31:07 -04:00
rustc_driver
rustc_driver_impl Auto merge of #122218 - Zoxc:no-interleave-panics, r=michaelwoerister 2024-03-12 14:01:38 +00:00
rustc_error_codes Improve error message for opaque captures 2024-03-08 19:08:13 +00:00
rustc_error_messages Rename SubdiagnosticMessage as SubdiagMessage. 2024-03-05 12:14:49 +11:00
rustc_errors Rollup merge of #122194 - oli-obk:stash_delay_bug, r=nnethercote 2024-03-12 06:29:03 +01:00
rustc_expand Rollup merge of #121382 - nnethercote:rework-untranslatable_diagnostic-lint, r=davidtwco 2024-03-06 22:02:46 +01:00
rustc_feature Rollup merge of #121840 - oli-obk:freeze, r=dtolnay 2024-03-11 03:47:19 -04:00
rustc_fluent_macro Rename SubdiagnosticMessage as SubdiagMessage. 2024-03-05 12:14:49 +11:00
rustc_fs_util Invert diagnostic lints. 2024-02-06 13:12:33 +11:00
rustc_graphviz Invert diagnostic lints. 2024-02-06 13:12:33 +11:00
rustc_hir Some comment nits 2024-03-12 08:51:20 +00:00
rustc_hir_analysis Manual rustfmt 2024-03-12 05:53:46 +00:00
rustc_hir_pretty Add asm label support to AST and HIR 2024-02-24 18:49:39 +00:00
rustc_hir_typeck Change DefKind::Static to a struct variant 2024-03-12 05:53:46 +00:00
rustc_incremental Rename all ParseSess variables/fields/lifetimes as psess. 2024-03-05 08:11:45 +11:00
rustc_index doc: Add better explanation 2024-03-06 16:54:42 +01:00
rustc_index_macros Step all bootstrap cfgs forward 2024-02-08 07:44:34 -05:00
rustc_infer Change DefKind::Static to a struct variant 2024-03-12 05:53:46 +00:00
rustc_interface Auto merge of #122227 - Zoxc:query-hash-verify, r=michaelwoerister 2024-03-13 02:01:56 +00:00
rustc_lexer Invert diagnostic lints. 2024-02-06 13:12:33 +11:00
rustc_lint Allow multiple impl Into<{D,Subd}iagMessage> parameters in a function. 2024-03-11 16:42:10 +11:00
rustc_lint_defs Declare new lint 2024-03-09 01:13:42 +01:00
rustc_llvm llvm-wrapper: adapt for LLVM API changes 2024-03-12 12:39:25 +00:00
rustc_log rustc_log: expose tracing-tree "wraparound" in an env var 2024-03-03 12:33:26 +01:00
rustc_macros Rename diagnostic derive things. 2024-03-11 10:06:34 +11:00
rustc_metadata s/mt/mutability/ 2024-03-12 05:53:46 +00:00
rustc_middle Avoid lowering code under dead SwitchInt targets 2024-03-12 19:01:04 -04:00
rustc_mir_build Change DefKind::Static to a struct variant 2024-03-12 05:53:46 +00:00
rustc_mir_dataflow Distinguish between library and lang UB in assert_unsafe_precondition 2024-03-08 18:53:58 -05:00
rustc_mir_transform Ensure nested allocations in statics do not get deduplicated 2024-03-12 05:53:46 +00:00
rustc_monomorphize Ensure nested allocations in statics do not get deduplicated 2024-03-12 05:53:46 +00:00
rustc_next_trait_solver Allow a way to add constructors for rustc_type_ir types 2024-03-04 15:39:59 +00:00
rustc_parse Rollup merge of #122152 - wutchzone:120892, r=fmease 2024-03-11 09:29:35 -07:00
rustc_parse_format remove a couple of redundant clones 2024-02-17 12:46:18 +01:00
rustc_passes Ensure nested allocations in statics do not get deduplicated 2024-03-12 05:53:46 +00:00
rustc_pattern_analysis Rename DecorateLint as LintDiagnostic. 2024-03-11 10:04:50 +11:00
rustc_privacy Change DefKind::Static to a struct variant 2024-03-12 05:53:46 +00:00
rustc_query_impl Verify that query keys result in unique dep nodes 2024-03-12 05:31:41 +01:00
rustc_query_system Rollup merge of #122245 - saethlin:check-dep-graph-size, r=petrochenkov 2024-03-12 09:04:00 -07:00
rustc_resolve Manual rustfmt 2024-03-12 05:53:46 +00:00
rustc_serialize Replace NonZero::<_>::new with NonZero::new. 2024-02-15 08:09:42 +01:00
rustc_session Auto merge of #122227 - Zoxc:query-hash-verify, r=michaelwoerister 2024-03-13 02:01:56 +00:00
rustc_smir Change DefKind::Static to a struct variant 2024-03-12 05:53:46 +00:00
rustc_span Ensure nested allocations in statics do not get deduplicated 2024-03-12 05:53:46 +00:00
rustc_symbol_mangling Rename IntoDiagnostic as Diagnostic. 2024-03-11 09:15:09 +11:00
rustc_target Auto merge of #122170 - alexcrichton:rename-wasi-threads, r=petrochenkov 2024-03-12 08:30:46 +00:00
rustc_trait_selection Fix discriminant_kind copy paste from the pointee trait case 2024-03-12 14:37:22 +03:00
rustc_traits Merge check_mod_impl_wf and check_mod_type_wf 2024-03-07 06:27:09 +00:00
rustc_transmute bump itertools to 0.12 2024-03-08 12:34:05 +03:00
rustc_ty_utils Rollup merge of #122366 - oli-obk:opaques_defined_by_overflow, r=lcnr 2024-03-12 09:04:02 -07:00
rustc_type_ir Remove Ord from ClosureKind 2024-03-09 21:16:43 +08:00
stable_mir Distinguish between library and lang UB in assert_unsafe_precondition 2024-03-08 18:53:58 -05:00