1 files changed, 62 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/wasm-get-return.js b/js/src/jit-test/tests/debug/wasm-get-return.js
new file mode 100644
index 0000000000..233d8cf5da
--- /dev/null
+++ b/js/src/jit-test/tests/debug/wasm-get-return.js
@@ -0,0 +1,62 @@
+// |jit-test| test-also=--wasm-compiler=optimizing; skip-if: !wasmDebuggingEnabled()
+// Tests that wasm frame opPop event can access function resumption value.
+
+load(libdir + "wasm.js");
+load(libdir + 'eqArrayHelper.js');
+
+function monitorFrameOnPopReturns(wast, expected) {
+    var values = [];
+    wasmRunWithDebugger(
+        wast,
+        undefined,
+        function ({dbg}) {
+            dbg.onEnterFrame = function (frame) {
+                if (frame.type != 'wasmcall') return;
+                frame.onPop = function (value) {
+                    values.push(value.return);
+                };
+            };
+        },
+        function ({error}) {
+            assertEq(error, undefined);
+        }
+    );
+    assertEqArray(values, expected);
+}
+
+monitorFrameOnPopReturns(
+  `(module (func (export "test")))`,
+  [undefined]);
+monitorFrameOnPopReturns(
+  `(module (func (export "test") (result i32) (i32.const 42)))`,
+  [42]);
+monitorFrameOnPopReturns(
+  `(module (func (export "test") (result f32) (f32.const 0.5)))`,
+  [0.5]);
+monitorFrameOnPopReturns(
+  `(module (func (export "test") (result f64) (f64.const -42.75)))`,
+  [-42.75]);
+monitorFrameOnPopReturns(
+  `(module (func (result i64) (i64.const 2)) (func (export "test") (call 0) (drop)))`,
+  [2, undefined]);
+
+// Checking if throwing frame has right resumption value.
+var throwCount = 0;
+wasmRunWithDebugger(
+    '(module (func (unreachable)) (func (export "test") (result i32) (call 0) (i32.const 1)))',
+    undefined,
+    function ({dbg, g}) {
+        dbg.onEnterFrame = function (frame) {
+            if (frame.type != 'wasmcall') return;
+            frame.onPop = function (value) {
+                if ('throw' in value)
+                    throwCount++;
+            };
+        };
+    },
+    function ({error}) {
+        assertEq(error != undefined, true);
+        assertEq(throwCount, 2);
+    }
+);
+