1 files changed, 53 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/wasm-jseval.js b/js/src/jit-test/tests/debug/wasm-jseval.js
new file mode 100644
index 0000000000..9b23d9ac6c
--- /dev/null
+++ b/js/src/jit-test/tests/debug/wasm-jseval.js
@@ -0,0 +1,53 @@
+// |jit-test| skip-if: !wasmDebuggingEnabled()
+// Tests that JS can be evaluated on wasm module scripts frames.
+
+load(libdir + "wasm.js");
+
+wasmRunWithDebugger(
+    '(module (memory 1 1)\
+     (global (mut f64) (f64.const 0.5))\
+     (global f32 (f32.const 3.5))\
+     (func (param i32) (local f64) \
+       nop \
+       f64.const 1.0 \
+       local.tee 1 \
+       global.set 0 \
+       nop) \
+     (export "test" (func 0))\
+     (data (i32.const 0) "Abc\\x2A"))',
+    undefined,
+    function ({dbg}) {
+        dbg.onEnterFrame = function (frame) {
+            if (frame.type != 'wasmcall') return;
+
+            var memoryContent = frame.eval('new DataView(memory0.buffer).getUint8(3)').return;
+            assertEq(memoryContent, 42, 'valid memory content is expected (0x2A)');
+
+            var global1AndParamSum = frame.eval('global1 + var0').return;
+            assertEq(global1AndParamSum, 3.5);
+
+            var stepNumber = 0;
+            frame.onStep = function () {
+                switch (stepNumber) {
+                  case 0: // before nop
+                    assertEq(frame.offset, 65);
+                    assertEq(frame.eval('global0').return, 0.5);
+                    assertEq(frame.eval('var1').return, 0.0);
+                    break;
+                  case 2: // after local.tee $var1
+                    assertEq(frame.offset, 79);
+                    assertEq(frame.eval('var1').return, 1.0);
+                    break;
+                  case 3: // after global.set $global0
+                    assertEq(frame.offset, 80);
+                    assertEq(frame.eval('global0').return, 1.0);
+                    break;
+                }
+                stepNumber++;
+            };
+        };
+  },
+  function ({error}) {
+      assertEq(error, undefined);
+  }
+);