1 files changed, 32 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/wasm-09.js b/js/src/jit-test/tests/debug/wasm-09.js
new file mode 100644
index 0000000000..c01a696d0a
--- /dev/null
+++ b/js/src/jit-test/tests/debug/wasm-09.js
@@ -0,0 +1,32 @@
+// |jit-test| test-also=--wasm-compiler=optimizing; skip-if: !wasmDebuggingEnabled()
+// Tests debugEnabled state of wasm when allowUnobservedWasm == true.
+
+load(libdir + "asserts.js");
+
+// Checking that there are no offsets are present in a wasm instance script for
+// which debug mode was not enabled.
+function getWasmScriptWithoutAllowUnobservedWasm(wast) {
+    var sandbox = newGlobal({newCompartment: true});
+    var dbg = new Debugger();
+    dbg.allowUnobservedWasm = true;
+    dbg.addDebuggee(sandbox);
+    sandbox.eval(`
+        var wasm = wasmTextToBinary('${wast}');
+        var m = new WebAssembly.Instance(new WebAssembly.Module(wasm));
+    `);
+    // Attaching after wasm instance is created.
+    var wasmScript = dbg.findScripts().filter(s => s.format == 'wasm')[0];
+    return wasmScript;
+}
+
+var wasmScript1 = getWasmScriptWithoutAllowUnobservedWasm('(module (func (nop)))');
+var wasmLines1 = wasmScript1.source.text.split('\n');
+assertEq(wasmScript1.startLine, 1);
+assertEq(wasmScript1.lineCount, 0);
+assertEq(wasmLines1.every((l, n) => wasmScript1.getLineOffsets(n + 1).length == 0), true);
+
+// Checking that we must not resolve any location for any offset in a wasm
+// instance which debug mode was not enabled.
+var wasmScript2 = getWasmScriptWithoutAllowUnobservedWasm('(module (func (nop)))');
+for (var i = wasmTextToBinary('(module (func (nop)))').length - 1; i >= 0; i--)
+    assertThrowsInstanceOf(() => wasmScript2.getOffsetLocation(i), Error);