8280842: Access violation in ciTypeFlow::profiled_count

Reviewed-by: neliasso, vlivanov, kvn

src/hotspot/share/ci/ciTypeFlow.cpp

@@ -2462,9 +2462,8 @@ int ciTypeFlow::profiled_count(ciTypeFlow::Loop* loop) {
   }
 
   ciProfileData* data = methodData->bci_to_data(tail->control());
-  assert(data != NULL, "some profile data expected at branch");
 
-  if (!data->is_JumpData()) {
+  if (data == NULL || !data->is_JumpData()) {
     return 0;
   }
 

test/hotspot/jtreg/compiler/profiling/TestSharedHeadExceptionBackedges.java

@@ -0,0 +1,60 @@
+/*
+ * Copyright (c) 2022, Red Hat, Inc. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * @test
+ * bug 8280842
+ * @summary Access violation in ciTypeFlow::profiled_count
+ * @run main/othervm -XX:-BackgroundCompilation TestSharedHeadExceptionBackedges
+ */
+
+public class TestSharedHeadExceptionBackedges {
+    public static void main(String[] args) {
+        for (int i = 0; i < 20_000; i++) {
+            test();
+        }
+    }
+
+    static class MyException extends Exception {
+    }
+
+    private static void test() {
+        int i = 0;
+        while (i < 10) {
+            try {
+                int j = 0;
+                i++;
+                if (i % 2 == 0) {
+                    throw new MyException();
+                }
+                do {
+                    j++;
+                } while (j < 100);
+
+                throw new MyException();
+
+            } catch (MyException me) {
+            }
+        }
+    }
+}