1 files changed, 52 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/wasm/import-export-sigs.js b/js/src/jit-test/tests/wasm/import-export-sigs.js
new file mode 100644
index 0000000000..8765d56b15
--- /dev/null
+++ b/js/src/jit-test/tests/wasm/import-export-sigs.js
@@ -0,0 +1,52 @@
+// |jit-test| skip-if: fuzzingSafe()
+
+// Tests that function imports and function exports descriptors have
+// signatures, in the test mode only, for fuzzers.
+
+var module = new WebAssembly.Module(wasmTextToBinary(`(module
+  (import "env" "v_v" (func $vv))
+  (export "v_v" (func $vv))
+
+  (import "env" "v_i" (func $vi (param i32)))
+  (export "v_i" (func $vi))
+
+  (import "env" "v_I" (func $vI (param i64)))
+  (export "v_I" (func $vI))
+
+  (import "env" "v_f" (func $vf (param f32)))
+  (export "v_f" (func $vf))
+
+  (import "env" "memory" (memory $mem 0))
+  (export "mem" (memory $mem))
+
+  (import "env" "v_d" (func $vd (param f64)))
+  (export "v_d" (func $vd))
+
+  (import "env" "v_fd" (func $vfd (param f32) (param f64)))
+  (export "v_fd" (func $vfd))
+
+  (import "env" "v_Ififd" (func $vIfifd (param i64) (param f32) (param i32) (param f32) (param f64)))
+  (export "v_Ififd" (func $vIfifd))
+
+  (import "env" "i_v" (func $iv (result i32)))
+  (export "i_v" (func $iv))
+
+  (import "env" "I_i" (func $Ii (param i32) (result i64)))
+  (export "I_i" (func $Ii))
+
+  (import "env" "table" (table $table 0 funcref))
+  (export "table" (table $table))
+
+  (import "env" "f_d" (func $fd (param f64) (result f32)))
+  (export "f_d" (func $fd))
+
+  (import "env" "d_ffd" (func $dffd (param f32) (param f32) (param f64) (result f64)))
+  (export "d_ffd" (func $dffd))
+)`));
+
+for (let desc of WebAssembly.Module.imports(module)) {
+    assertEq(typeof desc.signature, 'undefined');
+}
+for (let desc of WebAssembly.Module.exports(module)) {
+    assertEq(typeof desc.signature, 'undefined');
+}