Expose asyncify state via a getter (#2679)

Normally, a wrapper has to track state separately to know when to
unwind/rewind and when to actually call import functions.

Exposing Asyncify state can help avoid this duplication and avoid
subtle bugs when internal and wrapper state get out of sync.

Since this is a tiny function and it's useful for any Asyncify
embedder, I've decided to expose it by default rather than hide behind an option.

1 files changed, 4 insertions, 0 deletions

diff --git a/test/passes/asyncify_mod-asyncify-always-and-only-unwind.txt b/test/passes/asyncify_mod-asyncify-always-and-only-unwind.txt
index f5c1ed1c0..4c37eaa14 100644
--- a/test/passes/asyncify_mod-asyncify-always-and-only-unwind.txt
+++ b/test/passes/asyncify_mod-asyncify-always-and-only-unwind.txt
@@ -12,6 +12,7 @@
  (export "asyncify_stop_unwind" (func $asyncify_stop_unwind))
  (export "asyncify_start_rewind" (func $asyncify_start_rewind))
  (export "asyncify_stop_rewind" (func $asyncify_stop_rewind))
+ (export "asyncify_get_state" (func $asyncify_get_state))
  (func $calls-import (; 3 ;)
   (local $0 i32)
   (local $1 i32)
@@ -497,4 +498,7 @@
    (unreachable)
   )
  )
+ (func $asyncify_get_state (; 11 ;) (result i32)
+  (global.get $__asyncify_state)
+ )
 )