diff options
Diffstat (limited to 'vendor/crossbeam-epoch')
| -rw-r--r-- | vendor/crossbeam-epoch/.cargo-checksum.json | 2 | ||||
| -rw-r--r-- | vendor/crossbeam-epoch/CHANGELOG.md | 6 | ||||
| -rw-r--r-- | vendor/crossbeam-epoch/Cargo.lock | 105 | ||||
| -rw-r--r-- | vendor/crossbeam-epoch/Cargo.toml | 4 | ||||
| -rw-r--r-- | vendor/crossbeam-epoch/README.md | 4 | ||||
| -rw-r--r-- | vendor/crossbeam-epoch/build.rs | 12 | ||||
| -rw-r--r-- | vendor/crossbeam-epoch/src/atomic.rs | 108 | ||||
| -rw-r--r-- | vendor/crossbeam-epoch/src/collector.rs | 6 | ||||
| -rw-r--r-- | vendor/crossbeam-epoch/src/deferred.rs | 19 | ||||
| -rw-r--r-- | vendor/crossbeam-epoch/src/guard.rs | 6 | ||||
| -rw-r--r-- | vendor/crossbeam-epoch/src/internal.rs | 109 |
11 files changed, 234 insertions, 147 deletions
diff --git a/vendor/crossbeam-epoch/.cargo-checksum.json b/vendor/crossbeam-epoch/.cargo-checksum.json index beb3eb1dd..21e5f8500 100644 --- a/vendor/crossbeam-epoch/.cargo-checksum.json +++ b/vendor/crossbeam-epoch/.cargo-checksum.json @@ -1 +1 @@ -{"files":{"CHANGELOG.md":"709c5824af9170953e84db2552f4e8ae84d115314b59b768c62bdcd13c157e82","Cargo.lock":"cd480e52977de5a2e4182c1620fb5da9134fe82bfc6f696905ec0a1e1bd3d039","Cargo.toml":"1506e2615575ffc45c05dbcc248687740f04de5732b30bdb2d828ef4c4ae809b","LICENSE-APACHE":"a60eea817514531668d7e00765731449fe14d059d3249e0bc93b36de45f759f2","LICENSE-MIT":"5734ed989dfca1f625b40281ee9f4530f91b2411ec01cb748223e7eb87e201ab","README.md":"f946b25082979595d3851d90c4e76424be921a779e88e982f8455d44d46057ec","benches/defer.rs":"c330b704d96b2ad1aed29f72c37a99da534adef8cb06a3976d5f93bf567abb20","benches/flush.rs":"0389ac6c473632f0e93c962f223404cc360257f6699b4ec90b9b3be16bb6d74f","benches/pin.rs":"2f649a5153745c7930efdb32a52f9dc522f7b8cf548a251c5e2c82ee25dc3fff","build.rs":"aec5ae4d47d6ab1f281db6b7f7ec80ab3cc05bd0c20059643aee4446fcc0fcbf","examples/sanitize.rs":"a39d1635fa61e643e59192d7a63becc97ff81f03c1f4e03d38cedefb1525026a","no_atomic.rs":"916ed15218bb7b75a4e0d432430e7134efd27ca43ca8a8766e0c90e89febb602","src/atomic.rs":"6452c856fd808e99c8fc09fe7b563ce44342f9992b38c65613933c7c3fc5d84c","src/collector.rs":"e2d9780d8707e49360b3c33f2f829f29f70e6929307e65e23449b8ba6def6358","src/default.rs":"9c4d3951981d47efc748674d64b22eff27ecb2e3ef16369aa423592740ce6033","src/deferred.rs":"8ced786536d8d688381a8aa0b61e6e4d5e4fdd88e892cf82c0c5731e4801aa60","src/epoch.rs":"d31e66d8fe62299928e25867336d96391b26a4fe890a1cae0885dfcf36d6835b","src/guard.rs":"55c56ca1b2fbc067ae21108f0f7de4be91e5b41df2492055b635ed436782dd52","src/internal.rs":"67a6811b8c58e1152fd1dc17e389884025a0d99d79ab03dee26efcd0d6896690","src/lib.rs":"1c0765413dd66d4655e6417a69829ac5c2f4d504f66f77a87fe9c230c05e039d","src/sync/list.rs":"10aa4c59845ab9ff1d8bcb6f594b70bbe23c320fa7a2b125fdf85df88b9d61e2","src/sync/mod.rs":"cbc6334460d73761c3dea7f99ed2ccbf267d5da3bc76c812e94f85c9f4565c6a","src/sync/queue.rs":"06173b2255677d0d39178ceb49876fda2878f491e907c595eb65643dbb43c9ba","tests/loom.rs":"db772f4478966de6ec98774ca4093171dc942da635822a0d2d3257d31188cb9b"},"package":"07db9d94cbd326813772c968ccd25999e5f8ae22f4f8d1b11effa37ef6ce281d"}
\ No newline at end of file +{"files":{"CHANGELOG.md":"4a701ed7814fbde912aa7a1d15c95ed6b7ba3cd661c64f92c17b3b8bf67ecf5e","Cargo.lock":"018d954edeff6a45c6af01735239b639a83eed8258176481c6e9dae366085760","Cargo.toml":"4c1451a736e2ec0b31dfe6080140b69fdc614a0606db876308f1badf932dc1b9","LICENSE-APACHE":"a60eea817514531668d7e00765731449fe14d059d3249e0bc93b36de45f759f2","LICENSE-MIT":"5734ed989dfca1f625b40281ee9f4530f91b2411ec01cb748223e7eb87e201ab","README.md":"d67d0cf57751a019707dd95785345ee181a10ea80237789bc3c19bf28c0d45ca","benches/defer.rs":"c330b704d96b2ad1aed29f72c37a99da534adef8cb06a3976d5f93bf567abb20","benches/flush.rs":"0389ac6c473632f0e93c962f223404cc360257f6699b4ec90b9b3be16bb6d74f","benches/pin.rs":"2f649a5153745c7930efdb32a52f9dc522f7b8cf548a251c5e2c82ee25dc3fff","build.rs":"89e236e4e22dd748720129dcd02edfc08adccf708a7f0b03e41780e5bafb39cc","examples/sanitize.rs":"a39d1635fa61e643e59192d7a63becc97ff81f03c1f4e03d38cedefb1525026a","no_atomic.rs":"916ed15218bb7b75a4e0d432430e7134efd27ca43ca8a8766e0c90e89febb602","src/atomic.rs":"1bd4275c1411852024533e8a70959dfedf72029e3253544d1fbb0cc18b6fd519","src/collector.rs":"29e5911f61510247659b0090517bd1a38d11e1ed86e35811603cb599962d9a58","src/default.rs":"9c4d3951981d47efc748674d64b22eff27ecb2e3ef16369aa423592740ce6033","src/deferred.rs":"0c87df5797212778edd3c2d5fcf0cc04e8b9ed100261ecf9522f74a90804a3d5","src/epoch.rs":"d31e66d8fe62299928e25867336d96391b26a4fe890a1cae0885dfcf36d6835b","src/guard.rs":"f4439909152d38c03b6dfb6eeba6c9f07c39962187d461c92a492c27c258670b","src/internal.rs":"ac40ce276f0ed3dfd561926b78f775592eabb90790e177edde41fe50c13b8256","src/lib.rs":"1c0765413dd66d4655e6417a69829ac5c2f4d504f66f77a87fe9c230c05e039d","src/sync/list.rs":"10aa4c59845ab9ff1d8bcb6f594b70bbe23c320fa7a2b125fdf85df88b9d61e2","src/sync/mod.rs":"cbc6334460d73761c3dea7f99ed2ccbf267d5da3bc76c812e94f85c9f4565c6a","src/sync/queue.rs":"06173b2255677d0d39178ceb49876fda2878f491e907c595eb65643dbb43c9ba","tests/loom.rs":"db772f4478966de6ec98774ca4093171dc942da635822a0d2d3257d31188cb9b"},"package":"045ebe27666471bb549370b4b0b3e51b07f56325befa4284db65fc89c02511b1"}
\ No newline at end of file diff --git a/vendor/crossbeam-epoch/CHANGELOG.md b/vendor/crossbeam-epoch/CHANGELOG.md index 2f70edba7..b05a52dfc 100644 --- a/vendor/crossbeam-epoch/CHANGELOG.md +++ b/vendor/crossbeam-epoch/CHANGELOG.md @@ -1,3 +1,9 @@ +# Version 0.9.10 + +- Bump the minimum supported Rust version to 1.38. (#877) +- Mitigate the risk of segmentation faults in buggy downstream implementations. (#879) +- Add `{Atomic, Shared}::try_into_owned` (#701) + # Version 0.9.9 - Replace lazy_static with once_cell. (#817) diff --git a/vendor/crossbeam-epoch/Cargo.lock b/vendor/crossbeam-epoch/Cargo.lock index edb0c7378..726980a93 100644 --- a/vendor/crossbeam-epoch/Cargo.lock +++ b/vendor/crossbeam-epoch/Cargo.lock @@ -31,7 +31,7 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd" [[package]] name = "crossbeam-epoch" -version = "0.9.9" +version = "0.9.10" dependencies = [ "autocfg", "cfg-if", @@ -46,9 +46,9 @@ dependencies = [ [[package]] name = "crossbeam-utils" -version = "0.8.9" +version = "0.8.11" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "8ff1f980957787286a554052d03c7aee98d99cc32e09f6d45f0a814133c87978" +checksum = "51887d4adc7b564537b15adcfb307936f8075dfcd5f00dde9a9f1d29383682bc" dependencies = [ "cfg-if", "loom", @@ -57,15 +57,15 @@ dependencies = [ [[package]] name = "generator" -version = "0.7.0" +version = "0.7.1" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "c1d9279ca822891c1a4dae06d185612cf8fc6acfe5dff37781b41297811b12ee" +checksum = "cc184cace1cea8335047a471cc1da80f18acf8a76f3bab2028d499e328948ec7" dependencies = [ "cc", "libc", "log", "rustversion", - "winapi", + "windows", ] [[package]] @@ -133,9 +133,9 @@ dependencies = [ [[package]] name = "once_cell" -version = "1.12.0" +version = "1.13.0" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "7709cef83f0c1f58f666e746a08b21e0085f7440fa6a29cc194d68aac97a4225" +checksum = "18a6dbe30758c9f83eb00cbea4ac95966305f5a7772f3f42ebfc7fc7eddbd8e1" [[package]] name = "pin-project-lite" @@ -151,18 +151,18 @@ checksum = "eb9f9e6e233e5c4a35559a617bf40a4ec447db2e84c20b55a6f83167b7e57872" [[package]] name = "proc-macro2" -version = "1.0.39" +version = "1.0.40" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "c54b25569025b7fc9651de43004ae593a75ad88543b17178aa5e1b9c4f15f56f" +checksum = "dd96a1e8ed2596c337f8eae5f24924ec83f5ad5ab21ea8e455d3566c69fbcaf7" dependencies = [ "unicode-ident", ] [[package]] name = "quote" -version = "1.0.18" +version = "1.0.20" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "a1feb54ed693b93a84e14094943b84b7c4eae204c512b7ccb95ab0c66d278ad1" +checksum = "3bcdf212e9776fbcb2d23ab029360416bb1706b1aea2d1a5ba002727cbcab804" dependencies = [ "proc-macro2", ] @@ -199,9 +199,9 @@ dependencies = [ [[package]] name = "regex" -version = "1.5.6" +version = "1.6.0" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "d83f127d94bdbcda4c8cc2e50f6f84f4b611f69c902699ca385a39c3a75f9ff1" +checksum = "4c4eb3267174b8c6c2f654116623910a0fef09c4753f8dd83db29c48a0df988b" dependencies = [ "regex-syntax", ] @@ -217,15 +217,15 @@ dependencies = [ [[package]] name = "regex-syntax" -version = "0.6.26" +version = "0.6.27" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "49b3de9ec5dc0a3417da371aab17d729997c15010e7fd24ff707773a33bddb64" +checksum = "a3f87b73ce11b1619a3c6332f45341e0047173771e8b8b73f87bfeefb7b56244" [[package]] name = "rustversion" -version = "1.0.6" +version = "1.0.8" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "f2cc38e8fa666e2de3c4aba7edeb5ffc5246c1c2ed0e3d17e560aeeba736b23f" +checksum = "24c8ad4f0c00e1eb5bc7614d236a7f1300e3dbd76b68cac8e06fb00b015ad8d8" [[package]] name = "scoped-tls" @@ -250,15 +250,15 @@ dependencies = [ [[package]] name = "smallvec" -version = "1.8.0" +version = "1.9.0" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "f2dd574626839106c320a323308629dcb1acfc96e32a8cba364ddc61ac23ee83" +checksum = "2fd0db749597d91ff862fd1d55ea87f7855a744a8425a64695b6fca237d1dad1" [[package]] name = "syn" -version = "1.0.96" +version = "1.0.98" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "0748dd251e24453cb8717f0354206b91557e4ec8703673a4b30208f2abaf1ebf" +checksum = "c50aef8a904de4c23c788f104b7dddc7d6f79c647c7c8ce4cc8f73eb0ca773dd" dependencies = [ "proc-macro2", "quote", @@ -288,9 +288,9 @@ dependencies = [ [[package]] name = "tracing-attributes" -version = "0.1.21" +version = "0.1.22" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "cc6b8ad3567499f98a1db7a752b07a7c8c7c7c34c332ec00effb2b0027974b7c" +checksum = "11c75893af559bc8e10716548bdef5cb2b983f8e637db9d0e15126b61b484ee2" dependencies = [ "proc-macro2", "quote", @@ -299,9 +299,9 @@ dependencies = [ [[package]] name = "tracing-core" -version = "0.1.27" +version = "0.1.28" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "7709595b8878a4965ce5e87ebf880a7d39c9afc6837721b21a5a816a8117d921" +checksum = "7b7358be39f2f274f322d2aaed611acc57f382e8eb1e5b48cb9ae30933495ce7" dependencies = [ "once_cell", "valuable", @@ -320,13 +320,13 @@ dependencies = [ [[package]] name = "tracing-subscriber" -version = "0.3.11" +version = "0.3.15" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "4bc28f93baff38037f64e6f43d34cfa1605f27a49c34e8a04c5e78b0babf2596" +checksum = "60db860322da191b40952ad9affe65ea23e7dd6a5c442c2c42865810c6ab8e6b" dependencies = [ "ansi_term", - "lazy_static", "matchers", + "once_cell", "regex", "sharded-slab", "smallvec", @@ -338,9 +338,9 @@ dependencies = [ [[package]] name = "unicode-ident" -version = "1.0.1" +version = "1.0.2" source = "registry+https://github.com/rust-lang/crates.io-index" -checksum = "5bd2fe26506023ed7b5e1e315add59d6f584c621d037f9368fea9cfb988f368c" +checksum = "15c61ba63f9235225a22310255a29b806b907c9b8c964bcbd0a2c70f3f2deea7" [[package]] name = "valuable" @@ -375,3 +375,46 @@ name = "winapi-x86_64-pc-windows-gnu" version = "0.4.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f" + +[[package]] +name = "windows" +version = "0.32.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "fbedf6db9096bc2364adce0ae0aa636dcd89f3c3f2cd67947062aaf0ca2a10ec" +dependencies = [ + "windows_aarch64_msvc", + "windows_i686_gnu", + "windows_i686_msvc", + "windows_x86_64_gnu", + "windows_x86_64_msvc", +] + +[[package]] +name = "windows_aarch64_msvc" +version = "0.32.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "d8e92753b1c443191654ec532f14c199742964a061be25d77d7a96f09db20bf5" + +[[package]] +name = "windows_i686_gnu" +version = "0.32.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "6a711c68811799e017b6038e0922cb27a5e2f43a2ddb609fe0b6f3eeda9de615" + +[[package]] +name = "windows_i686_msvc" +version = "0.32.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "146c11bb1a02615db74680b32a68e2d61f553cc24c4eb5b4ca10311740e44172" + +[[package]] +name = "windows_x86_64_gnu" +version = "0.32.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "c912b12f7454c6620635bbff3450962753834be2a594819bd5e945af18ec64bc" + +[[package]] +name = "windows_x86_64_msvc" +version = "0.32.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "504a2476202769977a040c6364301a3f65d0cc9e3fb08600b2bda150a0488316" diff --git a/vendor/crossbeam-epoch/Cargo.toml b/vendor/crossbeam-epoch/Cargo.toml index 9d68295e6..1551c3c2c 100644 --- a/vendor/crossbeam-epoch/Cargo.toml +++ b/vendor/crossbeam-epoch/Cargo.toml @@ -11,9 +11,9 @@ [package] edition = "2018" -rust-version = "1.36" +rust-version = "1.38" name = "crossbeam-epoch" -version = "0.9.9" +version = "0.9.10" description = "Epoch-based garbage collection" homepage = "https://github.com/crossbeam-rs/crossbeam/tree/master/crossbeam-epoch" readme = "README.md" diff --git a/vendor/crossbeam-epoch/README.md b/vendor/crossbeam-epoch/README.md index eb33badff..2840ea792 100644 --- a/vendor/crossbeam-epoch/README.md +++ b/vendor/crossbeam-epoch/README.md @@ -8,7 +8,7 @@ https://github.com/crossbeam-rs/crossbeam/tree/master/crossbeam-epoch#license) https://crates.io/crates/crossbeam-epoch) []( https://docs.rs/crossbeam-epoch) -[]( +[]( https://www.rust-lang.org) [](https://discord.com/invite/JXYwgWZ) @@ -35,7 +35,7 @@ crossbeam-epoch = "0.9" Crossbeam Epoch supports stable Rust releases going back at least six months, and every time the minimum supported Rust version is increased, a new minor -version is released. Currently, the minimum supported Rust version is 1.36. +version is released. Currently, the minimum supported Rust version is 1.38. ## License diff --git a/vendor/crossbeam-epoch/build.rs b/vendor/crossbeam-epoch/build.rs index bba54d999..b3bd15a5a 100644 --- a/vendor/crossbeam-epoch/build.rs +++ b/vendor/crossbeam-epoch/build.rs @@ -41,17 +41,15 @@ fn main() { } }; - // Note that this is `no_*`, not `has_*`. This allows treating - // `cfg(target_has_atomic = "ptr")` as true when the build script doesn't - // run. This is needed for compatibility with non-cargo build systems that - // don't run the build script. + // Note that this is `no_`*, not `has_*`. This allows treating as the latest + // stable rustc is used when the build script doesn't run. This is useful + // for non-cargo build systems that don't run the build script. if NO_ATOMIC_CAS.contains(&&*target) { println!("cargo:rustc-cfg=crossbeam_no_atomic_cas"); } - if cfg.probe_rustc_version(1, 61) { - // TODO: invert cfg once Rust 1.61 became stable. - println!("cargo:rustc-cfg=crossbeam_const_fn_trait_bound"); + if !cfg.probe_rustc_version(1, 61) { + println!("cargo:rustc-cfg=crossbeam_no_const_fn_trait_bound"); } println!("cargo:rerun-if-changed=no_atomic.rs"); diff --git a/vendor/crossbeam-epoch/src/atomic.rs b/vendor/crossbeam-epoch/src/atomic.rs index b0b6a68e7..19bab4729 100644 --- a/vendor/crossbeam-epoch/src/atomic.rs +++ b/vendor/crossbeam-epoch/src/atomic.rs @@ -252,7 +252,7 @@ impl<T> Pointable for [MaybeUninit<T>] { let size = mem::size_of::<Array<T>>() + mem::size_of::<MaybeUninit<T>>() * len; let align = mem::align_of::<Array<T>>(); let layout = alloc::Layout::from_size_align(size, align).unwrap(); - let ptr = alloc::alloc(layout) as *mut Array<T>; + let ptr = alloc::alloc(layout).cast::<Array<T>>(); if ptr.is_null() { alloc::handle_alloc_error(layout); } @@ -305,6 +305,7 @@ impl<T> Atomic<T> { /// use crossbeam_epoch::Atomic; /// /// let a = Atomic::new(1234); + /// # unsafe { drop(a.into_owned()); } // avoid leak /// ``` pub fn new(init: T) -> Atomic<T> { Self::init(init) @@ -320,6 +321,7 @@ impl<T: ?Sized + Pointable> Atomic<T> { /// use crossbeam_epoch::Atomic; /// /// let a = Atomic::<i32>::init(1234); + /// # unsafe { drop(a.into_owned()); } // avoid leak /// ``` pub fn init(init: T::Init) -> Atomic<T> { Self::from(Owned::init(init)) @@ -342,7 +344,7 @@ impl<T: ?Sized + Pointable> Atomic<T> { /// /// let a = Atomic::<i32>::null(); /// ``` - #[cfg(all(crossbeam_const_fn_trait_bound, not(crossbeam_loom)))] + #[cfg(all(not(crossbeam_no_const_fn_trait_bound), not(crossbeam_loom)))] pub const fn null() -> Atomic<T> { Self { data: AtomicUsize::new(0), @@ -351,7 +353,7 @@ impl<T: ?Sized + Pointable> Atomic<T> { } /// Returns a new null atomic pointer. - #[cfg(not(all(crossbeam_const_fn_trait_bound, not(crossbeam_loom))))] + #[cfg(not(all(not(crossbeam_no_const_fn_trait_bound), not(crossbeam_loom))))] pub fn null() -> Atomic<T> { Self { data: AtomicUsize::new(0), @@ -373,6 +375,7 @@ impl<T: ?Sized + Pointable> Atomic<T> { /// let a = Atomic::new(1234); /// let guard = &epoch::pin(); /// let p = a.load(SeqCst, guard); + /// # unsafe { drop(a.into_owned()); } // avoid leak /// ``` pub fn load<'g>(&self, ord: Ordering, _: &'g Guard) -> Shared<'g, T> { unsafe { Shared::from_usize(self.data.load(ord)) } @@ -398,6 +401,7 @@ impl<T: ?Sized + Pointable> Atomic<T> { /// let a = Atomic::new(1234); /// let guard = &epoch::pin(); /// let p = a.load_consume(guard); + /// # unsafe { drop(a.into_owned()); } // avoid leak /// ``` pub fn load_consume<'g>(&self, _: &'g Guard) -> Shared<'g, T> { unsafe { Shared::from_usize(self.data.load_consume()) } @@ -415,8 +419,10 @@ impl<T: ?Sized + Pointable> Atomic<T> { /// use std::sync::atomic::Ordering::SeqCst; /// /// let a = Atomic::new(1234); + /// # unsafe { drop(a.load(SeqCst, &crossbeam_epoch::pin()).into_owned()); } // avoid leak /// a.store(Shared::null(), SeqCst); /// a.store(Owned::new(1234), SeqCst); + /// # unsafe { drop(a.into_owned()); } // avoid leak /// ``` pub fn store<P: Pointer<T>>(&self, new: P, ord: Ordering) { self.data.store(new.into_usize(), ord); @@ -437,6 +443,7 @@ impl<T: ?Sized + Pointable> Atomic<T> { /// let a = Atomic::new(1234); /// let guard = &epoch::pin(); /// let p = a.swap(Shared::null(), SeqCst, guard); + /// # unsafe { drop(p.into_owned()); } // avoid leak /// ``` pub fn swap<'g, P: Pointer<T>>(&self, new: P, ord: Ordering, _: &'g Guard) -> Shared<'g, T> { unsafe { Shared::from_usize(self.data.swap(new.into_usize(), ord)) } @@ -471,6 +478,7 @@ impl<T: ?Sized + Pointable> Atomic<T> { /// let curr = a.load(SeqCst, guard); /// let res1 = a.compare_exchange(curr, Shared::null(), SeqCst, SeqCst, guard); /// let res2 = a.compare_exchange(curr, Owned::new(5678), SeqCst, SeqCst, guard); + /// # unsafe { drop(curr.into_owned()); } // avoid leak /// ``` pub fn compare_exchange<'g, P>( &self, @@ -526,6 +534,7 @@ impl<T: ?Sized + Pointable> Atomic<T> { /// /// let mut new = Owned::new(5678); /// let mut ptr = a.load(SeqCst, guard); + /// # unsafe { drop(a.load(SeqCst, guard).into_owned()); } // avoid leak /// loop { /// match a.compare_exchange_weak(ptr, new, SeqCst, SeqCst, guard) { /// Ok(p) => { @@ -546,6 +555,7 @@ impl<T: ?Sized + Pointable> Atomic<T> { /// Err(err) => curr = err.current, /// } /// } + /// # unsafe { drop(curr.into_owned()); } // avoid leak /// ``` pub fn compare_exchange_weak<'g, P>( &self, @@ -608,6 +618,7 @@ impl<T: ?Sized + Pointable> Atomic<T> { /// /// let res2 = a.fetch_update(SeqCst, SeqCst, guard, |x| None); /// assert!(res2.is_err()); + /// # unsafe { drop(a.into_owned()); } // avoid leak /// ``` pub fn fetch_update<'g, F>( &self, @@ -666,6 +677,7 @@ impl<T: ?Sized + Pointable> Atomic<T> { /// let curr = a.load(SeqCst, guard); /// let res1 = a.compare_and_set(curr, Shared::null(), SeqCst, guard); /// let res2 = a.compare_and_set(curr, Owned::new(5678), SeqCst, guard); + /// # unsafe { drop(curr.into_owned()); } // avoid leak /// ``` // TODO: remove in the next major version. #[allow(deprecated)] @@ -723,6 +735,7 @@ impl<T: ?Sized + Pointable> Atomic<T> { /// /// let mut new = Owned::new(5678); /// let mut ptr = a.load(SeqCst, guard); + /// # unsafe { drop(a.load(SeqCst, guard).into_owned()); } // avoid leak /// loop { /// match a.compare_and_set_weak(ptr, new, SeqCst, guard) { /// Ok(p) => { @@ -743,6 +756,7 @@ impl<T: ?Sized + Pointable> Atomic<T> { /// Err(err) => curr = err.current, /// } /// } + /// # unsafe { drop(curr.into_owned()); } // avoid leak /// ``` // TODO: remove in the next major version. #[allow(deprecated)] @@ -877,6 +891,52 @@ impl<T: ?Sized + Pointable> Atomic<T> { Owned::from_usize(self.data.into_inner()) } } + + /// Takes ownership of the pointee if it is non-null. + /// + /// This consumes the atomic and converts it into [`Owned`]. As [`Atomic`] doesn't have a + /// destructor and doesn't drop the pointee while [`Owned`] does, this is suitable for + /// destructors of data structures. + /// + /// # Safety + /// + /// This method may be called only if the pointer is valid and nobody else is holding a + /// reference to the same object, or the pointer is null. + /// + /// # Examples + /// + /// ```rust + /// # use std::mem; + /// # use crossbeam_epoch::Atomic; + /// struct DataStructure { + /// ptr: Atomic<usize>, + /// } + /// + /// impl Drop for DataStructure { + /// fn drop(&mut self) { + /// // By now the DataStructure lives only in our thread and we are sure we don't hold + /// // any Shared or & to it ourselves, but it may be null, so we have to be careful. + /// let old = mem::replace(&mut self.ptr, Atomic::null()); + /// unsafe { + /// if let Some(x) = old.try_into_owned() { + /// drop(x) + /// } + /// } + /// } + /// } + /// ``` + pub unsafe fn try_into_owned(self) -> Option<Owned<T>> { + // FIXME: See self.into_owned() + #[cfg(crossbeam_loom)] + let data = self.data.unsync_load(); + #[cfg(not(crossbeam_loom))] + let data = self.data.into_inner(); + if decompose_tag::<T>(data).0 == 0 { + None + } else { + Some(Owned::from_usize(data)) + } + } } impl<T: ?Sized + Pointable> fmt::Debug for Atomic<T> { @@ -925,6 +985,7 @@ impl<T: ?Sized + Pointable> From<Owned<T>> for Atomic<T> { /// use crossbeam_epoch::{Atomic, Owned}; /// /// let a = Atomic::<i32>::from(Owned::new(1234)); + /// # unsafe { drop(a.into_owned()); } // avoid leak /// ``` fn from(owned: Owned<T>) -> Self { let data = owned.data; @@ -1108,6 +1169,7 @@ impl<T: ?Sized + Pointable> Owned<T> { /// let o = Owned::new(1234); /// let guard = &epoch::pin(); /// let p = o.into_shared(guard); + /// # unsafe { drop(p.into_owned()); } // avoid leak /// ``` #[allow(clippy::needless_lifetimes)] pub fn into_shared<'g>(self, _: &'g Guard) -> Shared<'g, T> { @@ -1291,6 +1353,7 @@ impl<'g, T> Shared<'g, T> { /// let guard = &epoch::pin(); /// let p = a.load(SeqCst, guard); /// assert_eq!(p.as_raw(), raw); + /// # unsafe { drop(a.into_owned()); } // avoid leak /// ``` pub fn as_raw(&self) -> *const T { let (raw, _) = decompose_tag::<T>(self.data); @@ -1329,6 +1392,7 @@ impl<'g, T: ?Sized + Pointable> Shared<'g, T> { /// assert!(a.load(SeqCst, guard).is_null()); /// a.store(Owned::new(1234), SeqCst); /// assert!(!a.load(SeqCst, guard).is_null()); + /// # unsafe { drop(a.into_owned()); } // avoid leak /// ``` pub fn is_null(&self) -> bool { let (raw, _) = decompose_tag::<T>(self.data); @@ -1365,6 +1429,7 @@ impl<'g, T: ?Sized + Pointable> Shared<'g, T> { /// unsafe { /// assert_eq!(p.deref(), &1234); /// } + /// # unsafe { drop(a.into_owned()); } // avoid leak /// ``` pub unsafe fn deref(&self) -> &'g T { let (raw, _) = decompose_tag::<T>(self.data); @@ -1406,6 +1471,7 @@ impl<'g, T: ?Sized + Pointable> Shared<'g, T> { /// unsafe { /// assert_eq!(p.deref(), &vec![1, 2, 3, 4, 5]); /// } + /// # unsafe { drop(a.into_owned()); } // avoid leak /// ``` pub unsafe fn deref_mut(&mut self) -> &'g mut T { let (raw, _) = decompose_tag::<T>(self.data); @@ -1442,6 +1508,7 @@ impl<'g, T: ?Sized + Pointable> Shared<'g, T> { /// unsafe { /// assert_eq!(p.as_ref(), Some(&1234)); /// } + /// # unsafe { drop(a.into_owned()); } // avoid leak /// ``` pub unsafe fn as_ref(&self) -> Option<&'g T> { let (raw, _) = decompose_tag::<T>(self.data); @@ -1481,6 +1548,36 @@ impl<'g, T: ?Sized + Pointable> Shared<'g, T> { Owned::from_usize(self.data) } + /// Takes ownership of the pointee if it is not null. + /// + /// # Safety + /// + /// This method may be called only if the pointer is valid and nobody else is holding a + /// reference to the same object, or if the pointer is null. + /// + /// # Examples + /// + /// ``` + /// use crossbeam_epoch::{self as epoch, Atomic}; + /// use std::sync::atomic::Ordering::SeqCst; + /// + /// let a = Atomic::new(1234); + /// unsafe { + /// let guard = &epoch::unprotected(); + /// let p = a.load(SeqCst, guard); + /// if let Some(x) = p.try_into_owned() { + /// drop(x); + /// } + /// } + /// ``` + pub unsafe fn try_into_owned(self) -> Option<Owned<T>> { + if self.is_null() { + None + } else { + Some(Owned::from_usize(self.data)) + } + } + /// Returns the tag stored within the pointer. /// /// # Examples @@ -1493,6 +1590,7 @@ impl<'g, T: ?Sized + Pointable> Shared<'g, T> { /// let guard = &epoch::pin(); /// let p = a.load(SeqCst, guard); /// assert_eq!(p.tag(), 2); + /// # unsafe { drop(a.into_owned()); } // avoid leak /// ``` pub fn tag(&self) -> usize { let (_, tag) = decompose_tag::<T>(self.data); @@ -1516,6 +1614,7 @@ impl<'g, T: ?Sized + Pointable> Shared<'g, T> { /// assert_eq!(p1.tag(), 0); /// assert_eq!(p2.tag(), 2); /// assert_eq!(p1.as_raw(), p2.as_raw()); + /// # unsafe { drop(a.into_owned()); } // avoid leak /// ``` pub fn with_tag(&self, tag: usize) -> Shared<'g, T> { unsafe { Self::from_usize(compose_tag::<T>(self.data, tag)) } @@ -1536,6 +1635,7 @@ impl<T> From<*const T> for Shared<'_, T> { /// /// let p = Shared::from(Box::into_raw(Box::new(1234)) as *const _); /// assert!(!p.is_null()); + /// # unsafe { drop(p.into_owned()); } // avoid leak /// ``` fn from(raw: *const T) -> Self { let raw = raw as usize; @@ -1612,7 +1712,7 @@ mod tests { #[test] fn array_init() { let owned = Owned::<[MaybeUninit<usize>]>::init(10); - let arr: &[MaybeUninit<usize>] = &*owned; + let arr: &[MaybeUninit<usize>] = &owned; assert_eq!(arr.len(), 10); } } diff --git a/vendor/crossbeam-epoch/src/collector.rs b/vendor/crossbeam-epoch/src/collector.rs index 099a2ffc6..5b0851184 100644 --- a/vendor/crossbeam-epoch/src/collector.rs +++ b/vendor/crossbeam-epoch/src/collector.rs @@ -111,7 +111,7 @@ impl fmt::Debug for LocalHandle { #[cfg(all(test, not(crossbeam_loom)))] mod tests { - use std::mem; + use std::mem::ManuallyDrop; use std::sync::atomic::{AtomicUsize, Ordering}; use crossbeam_utils::thread; @@ -402,15 +402,13 @@ mod tests { v.push(i as i32); } - let ptr = v.as_mut_ptr() as usize; let len = v.len(); + let ptr = ManuallyDrop::new(v).as_mut_ptr() as usize; guard.defer_unchecked(move || { drop(Vec::from_raw_parts(ptr as *const i32 as *mut i32, len, len)); DESTROYS.fetch_add(len, Ordering::Relaxed); }); guard.flush(); - - mem::forget(v); } while DESTROYS.load(Ordering::Relaxed) < COUNT { diff --git a/vendor/crossbeam-epoch/src/deferred.rs b/vendor/crossbeam-epoch/src/deferred.rs index c33d51502..2f3d79fdf 100644 --- a/vendor/crossbeam-epoch/src/deferred.rs +++ b/vendor/crossbeam-epoch/src/deferred.rs @@ -29,6 +29,15 @@ impl fmt::Debug for Deferred { } impl Deferred { + pub(crate) const NO_OP: Self = { + fn no_op_call(_raw: *mut u8) {} + Self { + call: no_op_call, + data: MaybeUninit::uninit(), + _marker: PhantomData, + } + }; + /// Constructs a new `Deferred` from a `FnOnce()`. pub(crate) fn new<F: FnOnce()>(f: F) -> Self { let size = mem::size_of::<F>(); @@ -37,10 +46,10 @@ impl Deferred { unsafe { if size <= mem::size_of::<Data>() && align <= mem::align_of::<Data>() { let mut data = MaybeUninit::<Data>::uninit(); - ptr::write(data.as_mut_ptr() as *mut F, f); + ptr::write(data.as_mut_ptr().cast::<F>(), f); unsafe fn call<F: FnOnce()>(raw: *mut u8) { - let f: F = ptr::read(raw as *mut F); + let f: F = ptr::read(raw.cast::<F>()); f(); } @@ -52,12 +61,12 @@ impl Deferred { } else { let b: Box<F> = Box::new(f); let mut data = MaybeUninit::<Data>::uninit(); - ptr::write(data.as_mut_ptr() as *mut Box<F>, b); + ptr::write(data.as_mut_ptr().cast::<Box<F>>(), b); unsafe fn call<F: FnOnce()>(raw: *mut u8) { // It's safe to cast `raw` from `*mut u8` to `*mut Box<F>`, because `raw` is // originally derived from `*mut Box<F>`. - let b: Box<F> = ptr::read(raw as *mut Box<F>); + let b: Box<F> = ptr::read(raw.cast::<Box<F>>()); (*b)(); } @@ -74,7 +83,7 @@ impl Deferred { #[inline] pub(crate) fn call(mut self) { let call = self.call; - unsafe { call(self.data.as_mut_ptr() as *mut u8) }; + unsafe { call(self.data.as_mut_ptr().cast::<u8>()) }; } } diff --git a/vendor/crossbeam-epoch/src/guard.rs b/vendor/crossbeam-epoch/src/guard.rs index 6db3750b0..ba7fe1b11 100644 --- a/vendor/crossbeam-epoch/src/guard.rs +++ b/vendor/crossbeam-epoch/src/guard.rs @@ -46,6 +46,7 @@ use crate::internal::Local; /// if let Some(num) = unsafe { p.as_ref() } { /// println!("The number is {}.", num); /// } +/// # unsafe { drop(a.into_owned()); } // avoid leak /// ``` /// /// # Multiple guards @@ -184,6 +185,7 @@ impl Guard { /// }); /// } /// } + /// # unsafe { drop(a.into_owned()); } // avoid leak /// ``` pub unsafe fn defer_unchecked<F, R>(&self, f: F) where @@ -263,6 +265,7 @@ impl Guard { /// guard.defer_destroy(p); /// } /// } + /// # unsafe { drop(a.into_owned()); } // avoid leak /// ``` pub unsafe fn defer_destroy<T>(&self, ptr: Shared<'_, T>) { self.defer_unchecked(move || ptr.into_owned()); @@ -320,6 +323,7 @@ impl Guard { /// let p = a.load(SeqCst, &guard); /// assert_eq!(unsafe { p.as_ref() }, Some(&777)); /// } + /// # unsafe { drop(a.into_owned()); } // avoid leak /// ``` pub fn repin(&mut self) { if let Some(local) = unsafe { self.local.as_ref() } { @@ -356,6 +360,7 @@ impl Guard { /// let p = a.load(SeqCst, &guard); /// assert_eq!(unsafe { p.as_ref() }, Some(&777)); /// } + /// # unsafe { drop(a.into_owned()); } // avoid leak /// ``` pub fn repin_after<F, R>(&mut self, f: F) -> R where @@ -451,6 +456,7 @@ impl fmt::Debug for Guard { /// /// // Dropping `dummy` doesn't affect the current thread - it's just a noop. /// } +/// # unsafe { drop(a.into_owned()); } // avoid leak /// ``` /// /// The most common use of this function is when constructing or destructing a data structure. diff --git a/vendor/crossbeam-epoch/src/internal.rs b/vendor/crossbeam-epoch/src/internal.rs index de208b13e..00c66a40a 100644 --- a/vendor/crossbeam-epoch/src/internal.rs +++ b/vendor/crossbeam-epoch/src/internal.rs @@ -55,9 +55,10 @@ use crate::sync::list::{Entry, IsElement, IterError, List}; use crate::sync::queue::Queue; /// Maximum number of objects a bag can contain. -#[cfg(not(crossbeam_sanitize))] -const MAX_OBJECTS: usize = 62; -#[cfg(crossbeam_sanitize)] +#[cfg(not(any(crossbeam_sanitize, miri)))] +const MAX_OBJECTS: usize = 64; +// Makes it more likely to trigger any potential data races. +#[cfg(any(crossbeam_sanitize, miri))] const MAX_OBJECTS: usize = 4; /// A bag of deferred functions. @@ -106,87 +107,11 @@ impl Bag { } impl Default for Bag { - #[rustfmt::skip] fn default() -> Self { - // TODO: [no_op; MAX_OBJECTS] syntax blocked by https://github.com/rust-lang/rust/issues/49147 - #[cfg(not(crossbeam_sanitize))] - return Bag { + Bag { len: 0, - deferreds: [ - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - ], - }; - #[cfg(crossbeam_sanitize)] - return Bag { - len: 0, - deferreds: [ - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - Deferred::new(no_op_func), - ], - }; + deferreds: [Deferred::NO_OP; MAX_OBJECTS], + } } } @@ -194,7 +119,7 @@ impl Drop for Bag { fn drop(&mut self) { // Call all deferred functions. for deferred in &mut self.deferreds[..self.len] { - let no_op = Deferred::new(no_op_func); + let no_op = Deferred::NO_OP; let owned_deferred = mem::replace(deferred, no_op); owned_deferred.call(); } @@ -210,8 +135,6 @@ impl fmt::Debug for Bag { } } -fn no_op_func() {} - /// A pair of an epoch and a bag. #[derive(Default, Debug)] struct SealedBag { @@ -375,13 +298,14 @@ pub(crate) struct Local { // Make sure `Local` is less than or equal to 2048 bytes. // https://github.com/crossbeam-rs/crossbeam/issues/551 -#[cfg(not(crossbeam_sanitize))] // `crossbeam_sanitize` reduces the size of `Local` +#[cfg(not(any(crossbeam_sanitize, miri)))] // `crossbeam_sanitize` and `miri` reduce the size of `Local` #[test] fn local_size() { - assert!( - core::mem::size_of::<Local>() <= 2048, - "An allocation of `Local` should be <= 2048 bytes." - ); + // TODO: https://github.com/crossbeam-rs/crossbeam/issues/869 + // assert!( + // core::mem::size_of::<Local>() <= 2048, + // "An allocation of `Local` should be <= 2048 bytes." + // ); } impl Local { @@ -468,7 +392,10 @@ impl Local { // Now we must store `new_epoch` into `self.epoch` and execute a `SeqCst` fence. // The fence makes sure that any future loads from `Atomic`s will not happen before // this store. - if cfg!(any(target_arch = "x86", target_arch = "x86_64")) { + if cfg!(all( + any(target_arch = "x86", target_arch = "x86_64"), + not(miri) + )) { // HACK(stjepang): On x86 architectures there are two different ways of executing // a `SeqCst` fence. // |