From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:02:58 +0200 Subject: Adding upstream version 1.64.0+dfsg1. Signed-off-by: Daniel Baumann --- vendor/psm/examples/panics.rs | 52 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 vendor/psm/examples/panics.rs (limited to 'vendor/psm/examples/panics.rs') diff --git a/vendor/psm/examples/panics.rs b/vendor/psm/examples/panics.rs new file mode 100644 index 000000000..ada658d80 --- /dev/null +++ b/vendor/psm/examples/panics.rs @@ -0,0 +1,52 @@ +extern crate psm; + +use std::panic; + +const CHAIN_DEPTH: usize = 16; + +psm::psm_stack_manipulation! { + yes { + use std::alloc; + const STACK_ALIGN: usize = 4096; + // Generating backraces (because of RUST_BACKTRACE) create a few quite large frames, so it is + // important, that all frames have sufficient amount of available memory to not run over the + // stack... + const FRAME_SIZE: usize = 4096 * 10; + + fn panic_chain(depth: usize) { + if depth == 0 { + panic!("full chain!"); + } else { + unsafe { + let layout = alloc::Layout::from_size_align(FRAME_SIZE, STACK_ALIGN).unwrap(); + let new_stack = alloc::alloc(layout); + assert!(!new_stack.is_null(), "allocations must succeed!"); + let p = psm::on_stack(new_stack, FRAME_SIZE, || { + panic::catch_unwind(|| { + panic_chain(depth - 1); + }) + }); + alloc::dealloc(new_stack, layout); + p.map_err(panic::resume_unwind).unwrap() + } + } + } + + fn main() { + panic_chain(CHAIN_DEPTH); + } + + #[test] + fn run_example() { + assert!(panic::catch_unwind(|| { + panic_chain(CHAIN_DEPTH); + }).is_err(), "Panic did not propagate!"); + } + } + + no { + fn main() { + eprintln!("Stack manipulation not supported by this target"); + } + } +} -- cgit v1.2.3