1 files changed, 79 insertions, 0 deletions
diff --git a/tools/profiler/tests/test_asm.js b/tools/profiler/tests/test_asm.js
new file mode 100644
index 000000000..4d273a559
--- /dev/null
+++ b/tools/profiler/tests/test_asm.js
@@ -0,0 +1,79 @@
+// Check that asm.js code shows up on the stack.
+function run_test() {
+    let p = Cc["@mozilla.org/tools/profiler;1"];
+
+    // Just skip the test if the profiler component isn't present.
+    if (!p)
+        return;
+    p = p.getService(Ci.nsIProfiler);
+    if (!p)
+        return;
+
+    // This test assumes that it's starting on an empty SPS stack.
+    // (Note that the other profiler tests also assume the profiler
+    // isn't already started.)
+    do_check_true(!p.IsActive());
+
+    let jsFuns = Cu.getJSTestingFunctions();
+    if (!jsFuns.isAsmJSCompilationAvailable())
+        return;
+
+    const ms = 10;
+    p.StartProfiler(10000, ms, ["js"], 1);
+
+    let stack = null;
+    function ffi_function(){
+        var delayMS = 5;
+        while (1) {
+            let then = Date.now();
+            do {} while (Date.now() - then < delayMS);
+
+            var thread0 = p.getProfileData().threads[0];
+
+            if (delayMS > 30000)
+                return;
+
+            delayMS *= 2;
+
+            if (thread0.samples.data.length == 0)
+                continue;
+
+            var lastSample = thread0.samples.data[thread0.samples.data.length - 1];
+            stack = String(getInflatedStackLocations(thread0, lastSample));
+            if (stack.indexOf("trampoline") !== -1)
+                return;
+        }
+    }
+
+    function asmjs_module(global, ffis) {
+        "use asm";
+        var ffi = ffis.ffi;
+        function asmjs_function() {
+            ffi();
+        }
+        return asmjs_function;
+    }
+
+    do_check_true(jsFuns.isAsmJSModule(asmjs_module));
+
+    var asmjs_function = asmjs_module(null, {ffi:ffi_function});
+    do_check_true(jsFuns.isAsmJSFunction(asmjs_function));
+
+    asmjs_function();
+
+    do_check_neq(stack, null);
+
+    var i1 = stack.indexOf("entry trampoline");
+    do_check_true(i1 !== -1);
+    var i2 = stack.indexOf("asmjs_function");
+    do_check_true(i2 !== -1);
+    var i3 = stack.indexOf("FFI trampoline");
+    do_check_true(i3 !== -1);
+    var i4 = stack.indexOf("ffi_function");
+    do_check_true(i4 !== -1);
+    do_check_true(i1 < i2);
+    do_check_true(i2 < i3);
+    do_check_true(i3 < i4);
+
+    p.StopProfiler();
+}