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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... ``` |
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| .. | ||
| alloc | ||
| backtrace@ddf1b89b86 | ||
| core | ||
| panic_abort | ||
| panic_unwind | ||
| portable-simd | ||
| proc_macro | ||
| profiler_builtins | ||
| rtstartup | ||
| rustc-std-workspace-alloc | ||
| rustc-std-workspace-core | ||
| rustc-std-workspace-std | ||
| std | ||
| stdarch@56087ea170 | ||
| sysroot | ||
| test | ||
| unwind | ||