From 218caa410aa38c29984be31a5229b9fa717560ee Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:19:13 +0200 Subject: Merging upstream version 1.68.2+dfsg1. Signed-off-by: Daniel Baumann --- tests/ui/allocator/xcrate-use2.rs | 47 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 tests/ui/allocator/xcrate-use2.rs (limited to 'tests/ui/allocator/xcrate-use2.rs') diff --git a/tests/ui/allocator/xcrate-use2.rs b/tests/ui/allocator/xcrate-use2.rs new file mode 100644 index 000000000..d8478fb5e --- /dev/null +++ b/tests/ui/allocator/xcrate-use2.rs @@ -0,0 +1,47 @@ +// run-pass + +// aux-build:custom.rs +// aux-build:custom-as-global.rs +// aux-build:helper.rs +// no-prefer-dynamic + +#![feature(allocator_api)] + +extern crate custom; +extern crate custom_as_global; +extern crate helper; + +use std::alloc::{alloc, dealloc, GlobalAlloc, System, Layout}; +use std::sync::atomic::{AtomicUsize, Ordering}; + +static GLOBAL: custom::A = custom::A(AtomicUsize::new(0)); + +fn main() { + unsafe { + let n = custom_as_global::get(); + let layout = Layout::from_size_align(4, 2).unwrap(); + + // Global allocator routes to the `custom_as_global` global + let ptr = alloc(layout.clone()); + helper::work_with(&ptr); + assert_eq!(custom_as_global::get(), n + 1); + dealloc(ptr, layout.clone()); + assert_eq!(custom_as_global::get(), n + 2); + + // Usage of the system allocator avoids all globals + let ptr = System.alloc(layout.clone()); + helper::work_with(&ptr); + assert_eq!(custom_as_global::get(), n + 2); + System.dealloc(ptr, layout.clone()); + assert_eq!(custom_as_global::get(), n + 2); + + // Usage of our personal allocator doesn't affect other instances + let ptr = GLOBAL.alloc(layout.clone()); + helper::work_with(&ptr); + assert_eq!(custom_as_global::get(), n + 2); + assert_eq!(GLOBAL.0.load(Ordering::SeqCst), 1); + GLOBAL.dealloc(ptr, layout); + assert_eq!(custom_as_global::get(), n + 2); + assert_eq!(GLOBAL.0.load(Ordering::SeqCst), 2); + } +} -- cgit v1.2.3