Rollup merge of rust-lang#135948 - bjorn3:update_emscripten_std_tests, r=Mark-Simulacrum

Update emscripten std tests

This disables a bunch of emscripten tests that test things emscripten doesn't support and re-enables a whole bunch of tests which now work just fine on emscripten.

Tested with `EMCC_CFLAGS="-s MAXIMUM_MEMORY=2GB" ./x.py test library/ --target wasm32-unknown-emscripten`.

Author: jhpratt

library/alloc/benches/btree/map.rs

@@ -353,6 +353,7 @@ pub fn iter_10k(b: &mut Bencher) {
 }
 
 #[bench]
+#[cfg_attr(target_os = "emscripten", ignore)] // hits an OOM
 pub fn iter_1m(b: &mut Bencher) {
     bench_iter(b, 1_000, 1_000_000);
 }

library/alloc/benches/slice.rs

@@ -366,14 +366,25 @@ rotate!(rotate_medium_half, gen_random, 9158, 9158 / 2);
 rotate!(rotate_medium_half_plus_one, gen_random, 9158, 9158 / 2 + 1);
 
 // Intended to use more RAM than the machine has cache
+#[cfg(not(target_os = "emscripten"))] // hits an OOM
 rotate!(rotate_huge_by1, gen_random, 5 * 1024 * 1024, 1);
+#[cfg(not(target_os = "emscripten"))] // hits an OOM
 rotate!(rotate_huge_by9199_u64, gen_random, 5 * 1024 * 1024, 9199);
+#[cfg(not(target_os = "emscripten"))] // hits an OOM
 rotate!(rotate_huge_by9199_bytes, gen_random_bytes, 5 * 1024 * 1024, 9199);
+#[cfg(not(target_os = "emscripten"))] // hits an OOM
 rotate!(rotate_huge_by9199_strings, gen_strings, 5 * 1024 * 1024, 9199);
+#[cfg(not(target_os = "emscripten"))] // hits an OOM
 rotate!(rotate_huge_by9199_big, gen_big_random, 5 * 1024 * 1024, 9199);
+#[cfg(not(target_os = "emscripten"))] // hits an OOM
 rotate!(rotate_huge_by1234577_u64, gen_random, 5 * 1024 * 1024, 1234577);
+#[cfg(not(target_os = "emscripten"))] // hits an OOM
 rotate!(rotate_huge_by1234577_bytes, gen_random_bytes, 5 * 1024 * 1024, 1234577);
+#[cfg(not(target_os = "emscripten"))] // hits an OOM
 rotate!(rotate_huge_by1234577_strings, gen_strings, 5 * 1024 * 1024, 1234577);
+#[cfg(not(target_os = "emscripten"))] // hits an OOM
 rotate!(rotate_huge_by1234577_big, gen_big_random, 5 * 1024 * 1024, 1234577);
+#[cfg(not(target_os = "emscripten"))] // hits an OOM
 rotate!(rotate_huge_half, gen_random, 5 * 1024 * 1024, 5 * 1024 * 1024 / 2);
+#[cfg(not(target_os = "emscripten"))] // hits an OOM
 rotate!(rotate_huge_half_plus_one, gen_random, 5 * 1024 * 1024, 5 * 1024 * 1024 / 2 + 1);

library/alloc/benches/vec.rs

@@ -547,6 +547,11 @@ fn bench_in_place_collect_droppable(b: &mut Bencher) {
     })
 }
 
+// node.js gives out of memory error to use with length 1_100_000
+#[cfg(target_os = "emscripten")]
+const LEN: usize = 4096;
+
+#[cfg(not(target_os = "emscripten"))]
 const LEN: usize = 16384;
 
 #[bench]

library/alloc/tests/collections/binary_heap.rs

@@ -502,9 +502,7 @@ fn test_retain_catch_unwind() {
 // even if the order might not be correct.
 //
 // Destructors must be called exactly once per element.
-// 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 std::cmp;

library/alloc/tests/lib.rs

@@ -94,9 +94,6 @@ fn test_rng() -> rand_xorshift::XorShiftRng {
     rand::SeedableRng::from_seed(seed)
 }
 
-// FIXME: Instantiated functions with i128 in the signature is not supported in Emscripten.
-// See https://github.com/kripken/emscripten-fastcomp/issues/169
-#[cfg(not(target_os = "emscripten"))]
 #[test]
 fn test_boxed_hasher() {
     let ordinary_hash = hash(&5u32);

library/alloc/tests/slice.rs

@@ -1414,7 +1414,6 @@ fn test_box_slice_clone() {
 
 #[test]
 #[allow(unused_must_use)] // here, we care about the side effects of `.clone()`
-#[cfg_attr(target_os = "emscripten", ignore)]
 #[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")]
 fn test_box_slice_clone_panics() {
     use std::sync::Arc;

library/alloc/tests/sort/tests.rs

@@ -11,7 +11,14 @@ use crate::sort::{Sort, known_good_stable_sort, patterns};
 #[cfg(miri)]
 const TEST_LENGTHS: &[usize] = &[2, 3, 4, 7, 10, 15, 20, 24, 33, 50, 100, 171, 300];
 
-#[cfg(not(miri))]
+// node.js gives out of memory error to use with length 1_100_000
+#[cfg(all(not(miri), target_os = "emscripten"))]
+const TEST_LENGTHS: &[usize] = &[
+    2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 16, 17, 20, 24, 30, 32, 33, 35, 50, 100, 200, 500, 1_000,
+    2_048, 5_000, 10_000, 100_000,
+];
+
+#[cfg(all(not(miri), not(target_os = "emscripten")))]
 const TEST_LENGTHS: &[usize] = &[
     2, 3, 4, 5, 6, 7, 8, 9, 10, 15, 16, 17, 20, 24, 30, 32, 33, 35, 50, 100, 200, 500, 1_000,
     2_048, 5_000, 10_000, 100_000, 1_100_000,

library/alloc/tests/sync.rs

@@ -128,6 +128,7 @@ fn try_unwrap() {
 }
 
 #[test]
+#[cfg_attr(any(target_os = "emscripten", target_os = "wasi"), ignore)] // no threads
 fn into_inner() {
     for _ in 0..100
     // ^ Increase chances of hitting potential race conditions

library/alloc/tests/vec.rs

@@ -1587,9 +1587,7 @@ fn extract_if_complex() {
     }
 }
 
-// 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 extract_if_consumed_panic() {
     use std::rc::Rc;
@@ -1640,9 +1638,7 @@ fn extract_if_consumed_panic() {
     }
 }
 
-// FIXME: Re-enable emscripten once it can catch panics
 #[test]
-#[cfg(not(target_os = "emscripten"))]
 #[cfg_attr(not(panic = "unwind"), ignore = "test requires unwinding support")]
 fn extract_if_unconsumed_panic() {
     use std::rc::Rc;

library/core/tests/hash/mod.rs

@@ -141,9 +141,6 @@ fn test_custom_state() {
     // const { assert!(hash(&Custom { hash: 6 }) == 6) };
 }
 
-// FIXME: Instantiated functions with i128 in the signature is not supported in Emscripten.
-// See https://github.com/kripken/emscripten-fastcomp/issues/169
-#[cfg(not(target_os = "emscripten"))]
 #[test]
 fn test_indirect_hasher() {
     let mut hasher = MyHasher { hash: 0 };