1 files changed, 18 insertions, 0 deletions
diff --git a/tools/profiler/tests/xpcshell/test_enterjit_osr_enabling.js b/tools/profiler/tests/xpcshell/test_enterjit_osr_enabling.js
new file mode 100644
index 0000000000..3084a00018
--- /dev/null
+++ b/tools/profiler/tests/xpcshell/test_enterjit_osr_enabling.js
@@ -0,0 +1,18 @@
+function run_test() {
+  if (!AppConstants.MOZ_GECKO_PROFILER) {
+    return;
+  }
+
+  Assert.ok(!Services.profiler.IsActive());
+
+  // The function is entered with the profiler disabled.
+  (function() {
+    Services.profiler.StartProfiler(100, 10, ["js"]);
+    let n = 10000;
+    // eslint-disable-next-line no-empty
+    while (--n) {} // OSR happens here with the profiler enabled.
+    // An assertion will fail when this function returns, if the
+    // profiler stack was misbalanced.
+  })();
+  Services.profiler.StopProfiler();
+}