Auto merge of #112314 - ferrocene:pa-core-alloc-abort, r=bjorn3

Ignore `core`, `alloc` and `test` tests that require unwinding on `-C panic=abort`

Some of the tests for `core` and `alloc` require unwinding through their use of `catch_unwind`. These tests fail when testing using `-C panic=abort` (in my case through a target without unwinding support, and `-Z panic-abort-tests`), while they should be ignored as they don't indicate a failure.

This PR marks all of these tests with this attribute:

```rust
#[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")]
```

I'm not aware of a way to test this on rust-lang/rust's CI, as we don't test any target with `-C panic=abort`, but I tested this locally on a Ferrocene target and it does indeed make the test suite pass.

5 files changed, 18 insertions, 0 deletions

diff --git a/library/alloc/src/collections/binary_heap/tests.rs b/library/alloc/src/collections/binary_heap/tests.rs
index 500caa35678..565a7b7975f 100644
--- a/library/alloc/src/collections/binary_heap/tests.rs
+++ b/library/alloc/src/collections/binary_heap/tests.rs
@@ -309,6 +309,7 @@ fn test_drain_sorted() {
 }
 
 #[test]
+#[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")]
 fn test_drain_sorted_leak() {
     let d0 = CrashTestDummy::new(0);
     let d1 = CrashTestDummy::new(1);
@@ -475,6 +476,7 @@ fn test_retain() {
 }
 
 #[test]
+#[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")]
 fn test_retain_catch_unwind() {
     let mut heap = BinaryHeap::from(vec![3, 1, 2]);
 
@@ -502,6 +504,7 @@ fn test_retain_catch_unwind() {
 // FIXME: re-enable emscripten once it can unwind again
 #[test]
 #[cfg(not(target_os = "emscripten"))]
+#[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")]
 fn panic_safe() {
     use rand::seq::SliceRandom;
     use std::cmp;
diff --git a/library/alloc/src/collections/btree/map/tests.rs b/library/alloc/src/collections/btree/map/tests.rs
index 7ecffe3eef2..8efd9a03ad0 100644
--- a/library/alloc/src/collections/btree/map/tests.rs
+++ b/library/alloc/src/collections/btree/map/tests.rs
@@ -1155,6 +1155,7 @@ mod test_drain_filter {
     }
 
     #[test]
+    #[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")]
     fn drop_panic_leak() {
         let a = CrashTestDummy::new(0);
         let b = CrashTestDummy::new(1);
@@ -1175,6 +1176,7 @@ mod test_drain_filter {
     }
 
     #[test]
+    #[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")]
     fn pred_panic_leak() {
         let a = CrashTestDummy::new(0);
         let b = CrashTestDummy::new(1);
@@ -1201,6 +1203,7 @@ mod test_drain_filter {
 
     // Same as above, but attempt to use the iterator again after the panic in the predicate
     #[test]
+    #[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")]
     fn pred_panic_reuse() {
         let a = CrashTestDummy::new(0);
         let b = CrashTestDummy::new(1);
@@ -1449,6 +1452,7 @@ fn test_clear() {
 }
 
 #[test]
+#[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")]
 fn test_clear_drop_panic_leak() {
     let a = CrashTestDummy::new(0);
     let b = CrashTestDummy::new(1);
@@ -1540,11 +1544,13 @@ fn test_clone_panic_leak(size: usize) {
 }
 
 #[test]
+#[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")]
 fn test_clone_panic_leak_height_0() {
     test_clone_panic_leak(3)
 }
 
 #[test]
+#[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")]
 fn test_clone_panic_leak_height_1() {
     test_clone_panic_leak(MIN_INSERTS_HEIGHT_1)
 }
@@ -2099,6 +2105,7 @@ create_append_test!(test_append_239, 239);
 create_append_test!(test_append_1700, 1700);
 
 #[test]
+#[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")]
 fn test_append_drop_leak() {
     let a = CrashTestDummy::new(0);
     let b = CrashTestDummy::new(1);
@@ -2240,6 +2247,7 @@ fn test_split_off_large_random_sorted() {
 }
 
 #[test]
+#[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")]
 fn test_into_iter_drop_leak_height_0() {
     let a = CrashTestDummy::new(0);
     let b = CrashTestDummy::new(1);
@@ -2263,6 +2271,7 @@ fn test_into_iter_drop_leak_height_0() {
 }
 
 #[test]
+#[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")]
 fn test_into_iter_drop_leak_height_1() {
     let size = MIN_INSERTS_HEIGHT_1;
     for panic_point in vec![0, 1, size - 2, size - 1] {
diff --git a/library/alloc/src/collections/btree/set/tests.rs b/library/alloc/src/collections/btree/set/tests.rs
index a7c839d77ed..8eb730f4aaf 100644
--- a/library/alloc/src/collections/btree/set/tests.rs
+++ b/library/alloc/src/collections/btree/set/tests.rs
@@ -377,6 +377,7 @@ fn test_drain_filter() {
 }
 
 #[test]
+#[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")]
 fn test_drain_filter_drop_panic_leak() {
     let a = CrashTestDummy::new(0);
     let b = CrashTestDummy::new(1);
@@ -397,6 +398,7 @@ fn test_drain_filter_drop_panic_leak() {
 }
 
 #[test]
+#[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")]
 fn test_drain_filter_pred_panic_leak() {
     let a = CrashTestDummy::new(0);
     let b = CrashTestDummy::new(1);
diff --git a/library/alloc/src/collections/linked_list/tests.rs b/library/alloc/src/collections/linked_list/tests.rs
index 04594d55b6a..6a0ea618362 100644
--- a/library/alloc/src/collections/linked_list/tests.rs
+++ b/library/alloc/src/collections/linked_list/tests.rs
@@ -985,6 +985,7 @@ fn drain_filter_complex() {
 }
 
 #[test]
+#[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")]
 fn drain_filter_drop_panic_leak() {
     let d0 = CrashTestDummy::new(0);
     let d1 = CrashTestDummy::new(1);
@@ -1018,6 +1019,7 @@ fn drain_filter_drop_panic_leak() {
 }
 
 #[test]
+#[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")]
 fn drain_filter_pred_panic_leak() {
     static mut DROPS: i32 = 0;
 
@@ -1124,6 +1126,7 @@ fn test_drop_clear() {
 }
 
 #[test]
+#[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")]
 fn test_drop_panic() {
     static mut DROPS: i32 = 0;
 
diff --git a/library/alloc/src/slice/tests.rs b/library/alloc/src/slice/tests.rs
index f674530aaa5..54bc4e77b16 100644
--- a/library/alloc/src/slice/tests.rs
+++ b/library/alloc/src/slice/tests.rs
@@ -187,6 +187,7 @@ std::thread_local!(static SILENCE_PANIC: Cell<bool> = Cell::new(false));
 
 #[test]
 #[cfg_attr(target_os = "emscripten", ignore)] // no threads
+#[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")]
 fn panic_safe() {
     panic::update_hook(move |prev, info| {
         if !SILENCE_PANIC.with(|s| s.get()) {