Prepare tests to run on WASIp3

Cargo.toml

@@ -48,13 +48,13 @@ syn = { version = "2.0.89", features = ["printing"] }
 futures = "0.3.31"
 macro-string = "0.2.0"
 
-wat = "1.254.0"
-wasmparser = "0.254.0"
-wasm-encoder = "0.254.0"
-wasm-metadata = { version = "0.254.0", default-features = false }
-wit-parser = "0.254.0"
-wit-component = "0.254.0"
-wasm-compose = "0.254.0"
+wat = "1.257.0"
+wasmparser = "0.257.0"
+wasm-encoder = "0.257.0"
+wasm-metadata = { version = "0.257.0", default-features = false }
+wit-parser = "0.257.0"
+wit-component = "0.257.0"
+wasm-compose = "0.257.0"
 
 wit-bindgen-core = { path = 'crates/core', version = '0.60.0' }
 wit-bindgen-c = { path = 'crates/c', version = '0.60.0' }

ci/rebuild-libwit-bindgen-cabi.sh

@@ -42,6 +42,8 @@ set -ex
 version=$(./ci/print-current-version.sh | sed 's/\./_/g')
 
 realloc=cabi_realloc_wit_bindgen_$version
+wasip3_get=wit_bindgen_${version}_get_task_context
+wasip3_set=wit_bindgen_${version}_set_task_context
 
 rm -f crates/guest-rust/src/rt/wit_bindgen_*.{rs,o,c}
 rm -f crates/guest-rust/src/rt/libwit_bindgen_cabi.a
@@ -60,6 +62,17 @@ pub unsafe extern "C" fn $realloc(
 }
 EOF
 
+cat >./crates/guest-rust/src/rt/async_support/wasip3_context.rs <<-EOF
+// This file is generated by $0
+
+unsafe extern "C" {
+    #[link_name = "$wasip3_get"]
+    pub fn get() -> *mut u8;
+    #[link_name = "$wasip3_set"]
+    pub fn set(ptr: *mut u8);
+}
+EOF
+
 cat >./crates/guest-rust/src/rt/wit_bindgen_cabi_realloc.c <<-EOF
 // This file is generated by $0
 
@@ -86,6 +99,16 @@ void *wasip3_task_set(void *ptr) {
   WASIP3_TASK = ptr;
   return ret;
 }
+
+static _Thread_local void *task_context = NULL;
+
+void *$wasip3_get(void) {
+  return task_context;
+}
+
+void $wasip3_set(void *ptr) {
+  task_context = ptr;
+}
 EOF
 
 build() {