mirror of
https://github.com/rust-lang/rust.git
synced 2024-12-13 00:56:14 +00:00
1279830068
std support for wasm32 panic=unwind Tracking issue: #118168 This adds std support for `-Cpanic=unwind` on wasm, and with it slightly more fleshed out rustc support. Now, the stable default is still panic=abort without exception-handling, but if you `-Zbuild-std` with `RUSTFLAGS=-Cpanic=unwind`, you get wasm exception-handling try/catch blocks in the binary: ```rust #[no_mangle] pub fn foo_bar(x: bool) -> *mut u8 { let s = Box::<str>::from("hello"); maybe_panic(x); Box::into_raw(s).cast() } #[inline(never)] #[no_mangle] fn maybe_panic(x: bool) { if x { panic!("AAAAA"); } } ``` ```wat ;; snip... (try $label$5 (do (call $maybe_panic (local.get $0) ) (br $label$1) ) (catch_all (global.set $__stack_pointer (local.get $1) ) (call $__rust_dealloc (local.get $2) (i32.const 5) (i32.const 1) ) (rethrow $label$5) ) ) ;; snip... ``` |
||
---|---|---|
.. | ||
src | ||
Cargo.toml |