8274794: Print all owned locks in hs_err file

Reviewed-by: stuefe, dholmes

test/hotspot/jtreg/runtime/ErrorHandling/ErrorFileScanner.java

@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2021, Oracle and/or its affiliates. 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.
+ */
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.InputStreamReader;
+import java.io.IOException;
+
+import java.util.regex.Pattern;
+
+import jdk.test.lib.process.OutputAnalyzer;
+
+public class ErrorFileScanner {
+
+  public static File findHsErrorFileInOutput(OutputAnalyzer output) {
+
+    String hs_err_file = output.firstMatch("# *(\\S*hs_err_pid.*\\.log)", 1);
+    if(hs_err_file ==null) {
+      throw new RuntimeException("Did not find hs-err file in output.\n");
+    }
+
+    File f = new File(hs_err_file);
+    if (!f.exists()) {
+      throw new RuntimeException("hs-err file missing at "
+              + f.getAbsolutePath() + ".\n");
+    }
+
+    return f;
+
+  }
+
+  public static void scanHsErrorFileForContent(File f, Pattern[] pattern) throws IOException {
+    FileInputStream fis = new FileInputStream(f);
+    BufferedReader br = new BufferedReader(new InputStreamReader(fis));
+    String line = null;
+
+    int currentPattern = 0;
+
+    String lastLine = null;
+    while ((line = br.readLine()) != null && currentPattern < pattern.length) {
+      if (pattern[currentPattern].matcher(line).matches()) {
+        System.out.println("Found: " + line + ".");
+        currentPattern++;
+      }
+      lastLine = line;
+    }
+    br.close();
+
+    if (currentPattern < pattern.length) {
+      throw new RuntimeException("hs-err file incomplete (first missing pattern: " +  pattern[currentPattern] + ")");
+    }
+
+  }
+}