1 files changed, 76 insertions, 0 deletions
diff --git a/tools/profiler/tests/xpcshell/test_asm.js b/tools/profiler/tests/xpcshell/test_asm.js
new file mode 100644
index 0000000000..ced36ce429
--- /dev/null
+++ b/tools/profiler/tests/xpcshell/test_asm.js
@@ -0,0 +1,76 @@
+// Check that asm.js code shows up on the stack.
+add_task(async () => {
+  // This test assumes that it's starting on an empty profiler stack.
+  // (Note that the other profiler tests also assume the profiler
+  // isn't already started.)
+  Assert.ok(!Services.profiler.IsActive());
+
+  let jsFuns = Cu.getJSTestingFunctions();
+  if (!jsFuns.isAsmJSCompilationAvailable()) {
+    return;
+  }
+
+  const ms = 10;
+  await Services.profiler.StartProfiler(10000, ms, ["js"]);
+
+  let stack = null;
+  function ffi_function() {
+    var delayMS = 5;
+    while (1) {
+      let then = Date.now();
+      do {
+        // do nothing
+      } while (Date.now() - then < delayMS);
+
+      var thread0 = Services.profiler.getProfileData().threads[0];
+
+      if (delayMS > 30000) {
+        return;
+      }
+
+      delayMS *= 2;
+
+      if (!thread0.samples.data.length) {
+        continue;
+      }
+
+      var lastSample = thread0.samples.data[thread0.samples.data.length - 1];
+      stack = String(getInflatedStackLocations(thread0, lastSample));
+      if (stack.includes("trampoline")) {
+        return;
+      }
+    }
+  }
+
+  function asmjs_module(global, ffis) {
+    "use asm";
+    var ffi = ffis.ffi;
+    function asmjs_function() {
+      ffi();
+    }
+    return asmjs_function;
+  }
+
+  Assert.ok(jsFuns.isAsmJSModule(asmjs_module));
+
+  var asmjs_function = asmjs_module(null, { ffi: ffi_function });
+  Assert.ok(jsFuns.isAsmJSFunction(asmjs_function));
+
+  asmjs_function();
+
+  Assert.notEqual(stack, null);
+
+  var i1 = stack.indexOf("entry trampoline");
+  Assert.ok(i1 !== -1);
+  var i2 = stack.indexOf("asmjs_function");
+  Assert.ok(i2 !== -1);
+  var i3 = stack.indexOf("exit trampoline");
+  Assert.ok(i3 !== -1);
+  var i4 = stack.indexOf("ffi_function");
+  Assert.ok(i4 !== -1);
+  Assert.ok(i1 < i2);
+  Assert.ok(i2 < i3);
+  Assert.ok(i3 < i4);
+
+  await Services.profiler.StopProfiler();
+});