Bysyncify: Don't instrument functions that call bysyncify_* directly (#2179)

Those functions are assumed to be part of the runtime. Instrumenting them would mean nothing can work.

With this fix, bysyncify is useful with pure wasm, and not just through imports.

1 files changed, 9 insertions, 2 deletions

diff --git a/test/unit/test_bysyncify.py b/test/unit/test_bysyncify.py
index 29a8ae7cb..8d5a780e8 100644
--- a/test/unit/test_bysyncify.py
+++ b/test/unit/test_bysyncify.py
@@ -1,11 +1,11 @@
 import os
 
-from scripts.test.shared import WASM_OPT, NODEJS, run_process
+from scripts.test.shared import WASM_OPT, WASM_DIS, WASM_SHELL, NODEJS, run_process
 from utils import BinaryenTestCase
 
 
 class BysyncifyTest(BinaryenTestCase):
-  def test_bysyncify(self):
+  def test_bysyncify_js(self):
     def test(args):
       print(args)
       run_process(WASM_OPT + args + [self.input_path('bysyncify-sleep.wast'), '--bysyncify', '-o', 'a.wasm'])
@@ -19,3 +19,10 @@ class BysyncifyTest(BinaryenTestCase):
     test(['--optimize-level=1'])
     test(['-O3'])
     test(['-Os', '-g'])
+
+  def test_bysyncify_pure_wasm(self):
+    run_process(WASM_OPT + [self.input_path('bysyncify-pure.wast'), '--bysyncify', '-o', 'a.wasm'])
+    run_process(WASM_DIS + ['a.wasm', '-o', 'a.wast'])
+    output = run_process(WASM_SHELL + ['a.wast'], capture_output=True).stdout
+    with open(self.input_path('bysyncify-pure.txt')) as f:
+      self.assertEqual(f.read(), output)