1 files changed, 61 insertions, 0 deletions
diff --git a/js/src/gdb/tests/test-unwind.py b/js/src/gdb/tests/test-unwind.py
new file mode 100644
index 0000000000..d12c4b0f6e
--- /dev/null
+++ b/js/src/gdb/tests/test-unwind.py
@@ -0,0 +1,61 @@
+# Test the unwinder and the frame filter.
+# flake8:  NOQA: F821
+import platform
+
+
+def do_unwinder_test():
+    # The unwinder is disabled by default for the moment. Turn it on to check
+    # that the unwinder works as expected.
+    import gdb
+
+    gdb.execute("enable unwinder .* SpiderMonkey")
+
+    run_fragment("unwind.simple", "Something")
+
+    first = True
+    # The unwinder is a bit flaky still but should at least be able to
+    # recognize one set of entry and exit frames.  This also tests to
+    # make sure we didn't end up solely in the interpreter.
+    found_entry = False
+    found_exit = False
+    found_main = False
+    found_inner = False
+    found_outer = False
+    frames = list(gdb.frames.execute_frame_filters(gdb.newest_frame(), 0, -1))
+    for frame in frames:
+        print("examining " + frame.function())
+        if first:
+            assert_eq(frame.function().startswith("Something"), True)
+            first = False
+        elif frame.function() == "<<FrameType::Exit>>":
+            found_exit = True
+        elif frame.function() == "<<FrameType::CppToJSJit>>":
+            found_entry = True
+        elif frame.function() == "main":
+            found_main = True
+        elif "unwindFunctionInner" in frame.function():
+            found_inner = True
+        elif "unwindFunctionOuter" in frame.function():
+            found_outer = True
+
+    # Had to have found a frame.
+    assert_eq(first, False)
+    # Had to have found main.
+    assert_eq(found_main, True)
+    # Had to have found the entry and exit frames.
+    assert_eq(found_exit, True)
+    assert_eq(found_entry, True)
+    # Had to have found the names of the two JS functions.
+    assert_eq(found_inner, True)
+    assert_eq(found_outer, True)
+
+
+# Only on the right platforms.
+if platform.machine() == "x86_64" and platform.system() == "Linux":
+    # Only test when gdb has the unwinder feature.
+    try:
+        import gdb.unwinder  # NOQA: F401
+
+        do_unwinder_test()
+    except Exception:
+        pass