1 files changed, 59 insertions, 0 deletions
diff --git a/tools/profiler/tests/test_enterjit_osr.js b/tools/profiler/tests/test_enterjit_osr.js
new file mode 100644
index 000000000..a4bca590f
--- /dev/null
+++ b/tools/profiler/tests/test_enterjit_osr.js
@@ -0,0 +1,59 @@
+// Check that the EnterJIT frame, added by the JIT trampoline and
+// usable by a native unwinder to resume unwinding after encountering
+// JIT code, is pushed as expected.
+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());
+
+    const ms = 5;
+    p.StartProfiler(100, ms, ["js"], 1);
+
+    function arbitrary_name(){
+        // A frame for |arbitrary_name| has been pushed.  Do a sequence of
+        // increasingly long spins until we get a sample.
+        var delayMS = 5;
+        while (1) {
+            do_print("loop: ms = " + delayMS);
+            let then = Date.now();
+            do {
+                let n = 10000;
+                while (--n); // OSR happens here
+                // Spin in the hope of getting a sample.
+            } while (Date.now() - then < delayMS);
+            let pr = p.getProfileData().threads[0];
+            if (pr.samples.data.length > 0 || delayMS > 30000)
+                return pr;
+            delayMS *= 2;
+        }
+    };
+
+    var profile = arbitrary_name();
+
+    do_check_neq(profile.samples.data.length, 0);
+    var lastSample = profile.samples.data[profile.samples.data.length - 1];
+    var stack = getInflatedStackLocations(profile, lastSample);
+    do_print(stack);
+
+    // All we can really check here is ensure that there is exactly
+    // one arbitrary_name frame in the list.
+    var gotName = false;
+    for (var i = 0; i < stack.length; i++) {
+        if (stack[i].match(/arbitrary_name/)) {
+            do_check_eq(gotName, false);
+            gotName = true;
+        }
+    }
+    do_check_eq(gotName, true);
+
+    p.StopProfiler();
+}