feat: add cuda core dump CI warpper (#18909)

test/registered/debug_utils/test_cuda_coredump_smoke.py

@@ -0,0 +1,29 @@
+"""Smoke test: intentionally trigger a CUDA illegal memory access
+to verify the coredump collection pipeline works end-to-end.
+
+Manual use:  python3 test/registered/debug_utils/test_cuda_coredump_smoke.py
+"""
+
+import unittest
+
+import torch
+
+from sglang.test.ci.ci_register import register_cuda_ci
+
+register_cuda_ci(
+    est_time=10,
+    suite="stage-a-test-1",
+    disabled="Manual only: triggers intentional CUDA crash for coredump verification",
+)
+
+
+class TestCudaCoredumpSmoke(unittest.TestCase):
+    def test_trigger_illegal_memory_access(self):
+        x = torch.zeros(10, device="cuda")
+        y = torch.arange(10, device="cuda")
+        x[y * y] = 1
+        torch.cuda.synchronize()
+
+
+if __name__ == "__main__":
+    unittest.main()