Rollup merge of #102134 - flba-eb:master, r=bjorn3

Detect panic strategy using `rustc --print cfg`

Instead of relying on a command line parameter, detect if a target is able to unwind or not.
Ignore tests that require unwinding on targets that don't support it.

I did not find any place where the removed parameter has been used, but it feels a bit risky as
I'm new to this test framework.

r? bjorn3

Author: matthiaskrgr

src/test/ui/async-await/async-fn-size-moved-locals.rs

@@ -7,7 +7,6 @@
 //
 // See issue #59123 for a full explanation.
 
-// ignore-emscripten (sizes don't match)
 // needs-unwind Size of Futures change on panic=abort
 // run-pass
 

src/test/ui/async-await/issues/issue-65419/issue-65419-async-fn-resume-after-panic.rs

@@ -6,7 +6,6 @@
 // error-pattern: thread 'main' panicked at '`async fn` resumed after panicking'
 // edition:2018
 // ignore-wasm no panic or subprocess support
-// ignore-emscripten no panic or subprocess support
 
 #![feature(generators, generator_trait)]
 

src/test/ui/binding/fn-arg-incomplete-pattern-drop-order.rs

@@ -3,7 +3,6 @@
 // Check that partially moved from function parameters are dropped after the
 // named bindings that move from them.
 
-// ignore-wasm32-bare compiled with panic=abort by default
 
 use std::{panic, cell::RefCell};
 

src/test/ui/builtin-clone-unwind.rs

@@ -3,7 +3,6 @@
 
 #![allow(unused_variables)]
 #![allow(unused_imports)]
-// ignore-wasm32-bare compiled with panic=abort by default
 
 // Test that builtin implementations of `Clone` cleanup everything
 // in case of unwinding.

src/test/ui/catch-unwind-bang.rs

@@ -1,6 +1,5 @@
 // run-pass
 // needs-unwind
-// ignore-wasm32-bare compiled with panic=abort by default
 
 fn worker() -> ! {
     panic!()

src/test/ui/cfg/cfg-panic.rs

@@ -1,9 +1,6 @@
 // build-pass
 // compile-flags: -C panic=unwind
 // needs-unwind
-// ignore-emscripten no panic_unwind implementation
-// ignore-wasm32     no panic_unwind implementation
-// ignore-wasm64     no panic_unwind implementation
 
 
 #[cfg(panic = "abort")]

src/test/ui/closures/2229_closure_analysis/migrations/mir_calls_to_shims.fixed

@@ -3,7 +3,6 @@
 
 #![deny(rust_2021_incompatible_closure_captures)]
 //~^ NOTE: the lint level is defined here
-// ignore-wasm32-bare compiled with panic=abort by default
 #![feature(fn_traits)]
 #![feature(never_type)]
 

src/test/ui/closures/2229_closure_analysis/migrations/mir_calls_to_shims.rs

@@ -3,7 +3,6 @@
 
 #![deny(rust_2021_incompatible_closure_captures)]
 //~^ NOTE: the lint level is defined here
-// ignore-wasm32-bare compiled with panic=abort by default
 #![feature(fn_traits)]
 #![feature(never_type)]
 

src/test/ui/closures/2229_closure_analysis/migrations/mir_calls_to_shims.stderr

@@ -1,5 +1,5 @@
 error: changes to closure capture in Rust 2021 will affect which traits the closure implements
-  --> $DIR/mir_calls_to_shims.rs:21:38
+  --> $DIR/mir_calls_to_shims.rs:20:38
    |
 LL |     let result = panic::catch_unwind(move || {
    |                                      ^^^^^^^

src/test/ui/drop/dynamic-drop-async.rs

@@ -6,7 +6,6 @@
 // run-pass
 // needs-unwind
 // edition:2018
-// ignore-wasm32-bare compiled with panic=abort by default
 
 #![allow(unused)]
 

src/test/ui/drop/dynamic-drop.rs

@@ -1,6 +1,5 @@
 // run-pass
 // needs-unwind
-// ignore-wasm32-bare compiled with panic=abort by default
 
 #![feature(generators, generator_trait)]
 

src/test/ui/drop/repeat-drop.rs

@@ -1,8 +1,5 @@
 // run-pass
 // needs-unwind
-// ignore-wasm32-bare no unwinding panic
-// ignore-avr no unwinding panic
-// ignore-nvptx64 no unwinding panic
 
 static mut CHECK: usize = 0;
 

src/test/ui/extern-flag/empty-extern-arg.rs

@@ -1,6 +1,6 @@
 // compile-flags: --extern std=
 // error-pattern: extern location for std does not exist
 // needs-unwind since it affects the error output
-// ignore-emscripten compiled with panic=abort, personality not required
+// ignore-emscripten missing eh_catch_typeinfo lang item
 
 fn main() {}

src/test/ui/extern/issue-64655-allow-unwind-when-calling-panic-directly.rs

@@ -1,6 +1,5 @@
 // run-pass
 // needs-unwind
-// ignore-wasm32-bare compiled with panic=abort by default
 // ignore-emscripten no threads support
 
 // rust-lang/rust#64655: with panic=unwind, a panic from a subroutine

src/test/ui/extern/issue-64655-extern-rust-must-allow-unwind.rs

@@ -1,6 +1,5 @@
 // run-pass
 // needs-unwind
-// ignore-wasm32-bare compiled with panic=abort by default
 // ignore-emscripten no threads support
 
 // rust-lang/rust#64655: with panic=unwind, a panic from a subroutine

src/test/ui/generator/panic-drops-resume.rs

@@ -2,8 +2,6 @@
 
 // run-pass
 // needs-unwind
-// ignore-wasm       no unwind support
-// ignore-emscripten no unwind support
 
 #![feature(generators, generator_trait)]
 

src/test/ui/generator/panic-drops.rs

@@ -1,7 +1,6 @@
 // run-pass
 // needs-unwind
 
-// ignore-wasm32-bare compiled with panic=abort by default
 
 #![feature(generators, generator_trait)]
 

src/test/ui/generator/panic-safe.rs

@@ -1,7 +1,6 @@
 // run-pass
 // needs-unwind
 
-// ignore-wasm32-bare compiled with panic=abort by default
 
 #![feature(generators, generator_trait)]
 

src/test/ui/generator/resume-after-return.rs

@@ -1,7 +1,6 @@
 // run-pass
 // needs-unwind
 
-// ignore-wasm32-bare compiled with panic=abort by default
 
 #![feature(generators, generator_trait)]
 

src/test/ui/intrinsics/panic-uninitialized-zeroed.rs

@@ -1,6 +1,5 @@
 // run-pass
 // needs-unwind
-// ignore-wasm32-bare compiled with panic=abort by default
 // revisions: mir thir strict
 // [thir]compile-flags: -Zthir-unsafeck
 // [strict]compile-flags: -Zstrict-init-checks

src/test/ui/issues/issue-14875.rs

@@ -1,6 +1,5 @@
 // run-pass
 // needs-unwind
-// ignore-wasm32-bare compiled with panic=abort by default
 
 // Check that values are not leaked when a dtor panics (#14875)
 

src/test/ui/issues/issue-29948.rs

@@ -1,6 +1,5 @@
 // run-pass
 // needs-unwind
-// ignore-wasm32-bare compiled with panic=abort by default
 
 use std::panic;
 

src/test/ui/issues/issue-43853.rs

@@ -1,6 +1,5 @@
 // run-pass
 // needs-unwind
-// ignore-wasm32-bare compiled with panic=abort by default
 
 use std::panic;
 

src/test/ui/issues/issue-46519.rs

@@ -2,7 +2,6 @@
 // compile-flags:--test -O
 
 // needs-unwind
-// ignore-wasm32-bare compiled with panic=abort by default
 
 #[test]
 #[should_panic(expected = "creating inhabited type")]

src/test/ui/iterators/iter-count-overflow-debug.rs

@@ -1,7 +1,6 @@
 // run-pass
 // only-32bit too impatient for 2⁶⁴ items
 // needs-unwind
-// ignore-wasm32-bare compiled with panic=abort by default
 // compile-flags: -C debug_assertions=yes -C opt-level=3
 
 use std::panic;

src/test/ui/iterators/iter-position-overflow-debug.rs

@@ -1,7 +1,6 @@
 // run-pass
 // only-32bit too impatient for 2⁶⁴ items
 // needs-unwind
-// ignore-wasm32-bare compiled with panic=abort by default
 // compile-flags: -C debug_assertions=yes -C opt-level=3
 
 use std::panic;

src/test/ui/iterators/iter-step-overflow-debug.rs

@@ -1,6 +1,5 @@
 // run-pass
 // needs-unwind
-// ignore-wasm32-bare compiled with panic=abort by default
 // compile-flags: -C debug_assertions=yes
 
 use std::panic;

src/test/ui/iterators/iter-sum-overflow-debug.rs

@@ -1,6 +1,5 @@
 // run-pass
 // needs-unwind
-// ignore-wasm32-bare compiled with panic=abort by default
 // compile-flags: -C debug_assertions=yes
 
 use std::panic;

src/test/ui/iterators/iter-sum-overflow-overflow-checks.rs

@@ -1,6 +1,5 @@
 // run-pass
 // needs-unwind
-// ignore-wasm32-bare compiled with panic=abort by default
 // compile-flags: -C overflow-checks
 
 use std::panic;

src/test/ui/macros/macro-comma-behavior-rpass.rs

@@ -14,7 +14,6 @@
 // compile-flags: --test -C debug_assertions=yes
 // revisions: std core
 
-// ignore-wasm32-bare compiled with panic=abort by default
 #![cfg_attr(core, no_std)]
 
 #[cfg(core)]

src/test/ui/mir/mir_calls_to_shims.rs

@@ -1,6 +1,5 @@
 // run-pass
 // needs-unwind
-// ignore-wasm32-bare compiled with panic=abort by default
 
 #![feature(fn_traits)]
 #![feature(never_type)]

src/test/ui/mir/mir_codegen_calls_diverging_drops.rs

@@ -1,7 +1,6 @@
 // run-fail
 // error-pattern:diverging_fn called
 // error-pattern:0 dropped
-// ignore-emscripten no processes
 // needs-unwind this test checks that a destructor is called after panicking
 
 struct Droppable(u8);

src/test/ui/mir/mir_drop_order.rs

@@ -1,6 +1,5 @@
 // run-pass
 // needs-unwind
-// ignore-wasm32-bare compiled with panic=abort by default
 
 use std::cell::RefCell;
 use std::panic;

src/test/ui/mir/mir_drop_panics.rs

@@ -2,7 +2,6 @@
 // needs-unwind
 // error-pattern:panic 1
 // error-pattern:drop 2
-// ignore-emscripten no processes
 
 struct Droppable(u32);
 impl Drop for Droppable {

src/test/ui/mir/mir_let_chains_drop_order.rs

@@ -1,6 +1,5 @@
 // run-pass
 // needs-unwind
-// ignore-wasm32-bare compiled with panic=abort by default
 
 // See `mir_drop_order.rs` for more information
 

src/test/ui/numbers-arithmetic/next-power-of-two-overflow-debug.rs

@@ -1,7 +1,6 @@
 // run-pass
 // compile-flags: -C debug_assertions=yes
 // needs-unwind
-// ignore-wasm32-bare compiled with panic=abort by default
 // ignore-emscripten dies with an LLVM error
 
 use std::panic;

src/test/ui/panic-handler/weak-lang-item.rs

@@ -2,7 +2,7 @@
 // error-pattern: `#[panic_handler]` function required, but not found
 // error-pattern: language item required, but not found: `eh_personality`
 // needs-unwind since it affects the error output
-// ignore-emscripten compiled with panic=abort, personality not required
+// ignore-emscripten missing eh_catch_typeinfo lang item
 
 #![no_std]
 

src/test/ui/panic-runtime/need-abort-got-unwind.rs

@@ -2,7 +2,6 @@
 // needs-unwind
 // error-pattern:is incompatible with this crate's strategy of `unwind`
 // aux-build:needs-abort.rs
-// ignore-wasm32-bare compiled with panic=abort by default
 
 extern crate needs_abort;
 

src/test/ui/panic-runtime/transitive-link-a-bunch.rs

@@ -6,7 +6,6 @@
 // aux-build:wants-panic-runtime-abort.rs
 // aux-build:panic-runtime-lang-items.rs
 // error-pattern: is not compiled with this crate's panic strategy `unwind`
-// ignore-wasm32-bare compiled with panic=abort by default
 
 #![no_std]
 #![no_main]

src/test/ui/panic-runtime/want-unwind-got-abort.rs

@@ -3,7 +3,6 @@
 // error-pattern:is not compiled with this crate's panic strategy `unwind`
 // aux-build:panic-runtime-abort.rs
 // aux-build:panic-runtime-lang-items.rs
-// ignore-wasm32-bare compiled with panic=abort by default
 
 #![no_std]
 #![no_main]

src/test/ui/panic-runtime/want-unwind-got-abort2.rs

@@ -4,7 +4,6 @@
 // aux-build:panic-runtime-abort.rs
 // aux-build:wants-panic-runtime-abort.rs
 // aux-build:panic-runtime-lang-items.rs
-// ignore-wasm32-bare compiled with panic=abort by default
 
 #![no_std]
 #![no_main]

src/test/ui/panic-while-printing.rs

@@ -1,6 +1,5 @@
 // run-pass
 // needs-unwind
-// ignore-emscripten no subprocess support
 
 #![feature(internal_output_capture)]
 

src/test/ui/privacy/reachable-unnameable-items.rs

@@ -1,5 +1,4 @@
 // run-pass
-// ignore-wasm32-bare compiled with panic=abort by default
 // needs-unwind
 // aux-build:reachable-unnameable-items.rs
 

src/test/ui/proc-macro/expand-with-a-macro.rs

@@ -2,7 +2,6 @@
 // needs-unwind
 // aux-build:expand-with-a-macro.rs
 
-// ignore-wasm32-bare compiled with panic=abort by default
 
 #![deny(warnings)]
 

src/test/ui/rfc-1937-termination-trait/termination-trait-in-test.rs

@@ -2,7 +2,6 @@
 // run-pass
 // needs-unwind
 
-// ignore-wasm32-bare compiled with panic=abort by default
 
 #![feature(test)]
 

src/test/ui/rfc-2091-track-caller/std-panic-locations.rs

@@ -1,6 +1,5 @@
 // run-pass
 // needs-unwind
-// ignore-wasm32-bare compiled with panic=abort by default
 // revisions: default mir-opt
 //[mir-opt] compile-flags: -Zmir-opt-level=4
 

src/test/ui/rfcs/rfc1857-drop-order.rs

@@ -1,6 +1,5 @@
 // run-pass
 // needs-unwind
-// ignore-wasm32-bare compiled with panic=abort by default
 
 #![allow(dead_code, unreachable_code)]
 

src/test/ui/runtime/rt-explody-panic-payloads.rs

@@ -2,9 +2,6 @@
 // needs-unwind
 // ignore-emscripten no processes
 // ignore-sgx no processes
-// ignore-wasm32-bare no unwinding panic
-// ignore-avr no unwinding panic
-// ignore-nvptx64 no unwinding panic
 
 use std::env;
 use std::process::Command;

src/test/ui/test-attrs/test-panic-while-printing.rs

@@ -1,7 +1,6 @@
 // compile-flags:--test
 // run-pass
 // needs-unwind
-// ignore-emscripten no subprocess support
 
 use std::fmt;
 use std::fmt::{Display, Formatter};

src/test/ui/test-attrs/test-should-fail-good-message.rs

@@ -1,6 +1,5 @@
 // run-pass
 // needs-unwind
-// ignore-wasm32-bare compiled with panic=abort by default
 // compile-flags: --test
 #[test]
 #[should_panic(expected = "foo")]

src/test/ui/unwind-abis/ffi-unwind-calls-lint.rs

@@ -1,6 +1,5 @@
 // build-pass
 // needs-unwind
-// ignore-wasm32-bare compiled with panic=abort by default
 
 #![feature(c_unwind)]
 #![warn(ffi_unwind_calls)]