From 3c86ec1b8420b29720972fb82e50c043f15243d7 Mon Sep 17 00:00:00 2001
From: Guanqiang Han <yongheng_hgq@126.com>
Date: Fri, 23 Jan 2026 01:34:57 +0000
Subject: [PATCH] Extract a reproducer into a test method

---
 ...estPrintDiagnosticsWithoutProfileTraps.java | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/test/hotspot/jtreg/compiler/uncommontrap/TestPrintDiagnosticsWithoutProfileTraps.java b/test/hotspot/jtreg/compiler/uncommontrap/TestPrintDiagnosticsWithoutProfileTraps.java
index 81b39c8b142..51b30219aca 100644
--- a/test/hotspot/jtreg/compiler/uncommontrap/TestPrintDiagnosticsWithoutProfileTraps.java
+++ b/test/hotspot/jtreg/compiler/uncommontrap/TestPrintDiagnosticsWithoutProfileTraps.java
@@ -26,17 +26,33 @@
  * @bug 8374807
  * @summary Regression test for -XX:+TraceDeoptimization -XX:-ProfileTraps
  *          -XX:-TieredCompilation -Xcomp crash
+ * @modules java.base/jdk.internal.misc
  * @requires vm.debug
  * @run main/othervm -XX:+TraceDeoptimization -XX:-ProfileTraps
- *                   -XX:-TieredCompilation -Xcomp
+ *                   -XX:-TieredCompilation -Xcomp -Xbatch
+ *                   -XX:CompileCommand=compileonly,compiler.uncommontrap.TestPrintDiagnosticsWithoutProfileTraps::test
  *                   compiler.uncommontrap.TestPrintDiagnosticsWithoutProfileTraps
  */
 
 package compiler.uncommontrap;
 
+import jdk.internal.misc.Unsafe;
+
 public class TestPrintDiagnosticsWithoutProfileTraps {
+    static final Unsafe UNSAFE=Unsafe.getUnsafe();
+    static volatile long sink;
+
+    static class TestSubClass {
+        int f;
+    }
+
+    static void test(){
+        // Trigger a deopt/uncommon-trap path while resolving the field offset.
+        sink = UNSAFE.objectFieldOffset(TestSubClass.class,"f");
+    }
 
     public static void main(String[] args) {
+        test();
         System.out.println("passed");
     }
 }
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