rust/library
Jubilee 1279830068
Rollup merge of #121438 - coolreader18:wasm32-panic-unwind, r=cuviper
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...
```
2024-03-11 09:29:34 -07:00
..
alloc Rollup merge of #122298 - RalfJung:raw-vec-into-box, r=cuviper 2024-03-11 03:47:21 -04:00
backtrace@ddf1b89b86 Update backtrace submodule to 0.3.70 2024-03-10 12:52:23 -07:00
core Rollup merge of #121840 - oli-obk:freeze, r=dtolnay 2024-03-11 03:47:19 -04:00
panic_abort Cleanup windows abort_internal 2024-03-02 18:22:15 +00:00
panic_unwind Rollup merge of #121438 - coolreader18:wasm32-panic-unwind, r=cuviper 2024-03-11 09:29:34 -07:00
portable-simd Merge commit '649110751ef4f27440d7cc711b3e07d11bf02d4a' into sync-portable-simd-2024-02-18 2024-02-18 10:14:03 -05:00
proc_macro Rollup merge of #120976 - matthiaskrgr:constify_TL_statics, r=lcnr 2024-03-04 22:16:30 +01:00
profiler_builtins Add profiling support to AIX 2024-02-28 17:41:12 +08:00
rtstartup library: Fix warnings in rtstartup 2024-01-06 01:32:03 +03:00
rustc-std-workspace-alloc Replace libstd, libcore, liballoc in line comments. 2022-12-30 14:00:42 +01:00
rustc-std-workspace-core Switch all libraries to the 2021 edition 2021-12-23 19:03:47 +08:00
rustc-std-workspace-std Switch all libraries to the 2021 edition 2021-12-23 19:03:47 +08:00
std Rollup merge of #121438 - coolreader18:wasm32-panic-unwind, r=cuviper 2024-03-11 09:29:34 -07:00
stdarch@56087ea170 Rename wasm32-wasi-preview2 to wasm32-wasip2 2024-02-27 10:14:45 -05:00
sysroot Expose compiler-builtins-weak-intrinsics feature for -Zbuild-std 2023-06-23 11:15:34 +01:00
test Rust is a proper name: rust → Rust 2024-03-07 07:49:22 +01:00
unwind Rollup merge of #121438 - coolreader18:wasm32-panic-unwind, r=cuviper 2024-03-11 09:29:34 -07:00