--- a/test/hotspot/jtreg/serviceability/sa/ClhsdbCDSCore.java	Fri Sep 27 08:57:25 2019 -0700
+++ b/test/hotspot/jtreg/serviceability/sa/ClhsdbCDSCore.java	Fri Sep 27 10:48:23 2019 -0700
@@ -34,26 +34,30 @@
  * @run main/othervm/timeout=2400 -Xmx1g ClhsdbCDSCore
  */
 
-import java.util.List;
-import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Map;
-import java.util.HashMap;
-import jdk.test.lib.process.ProcessTools;
-import jdk.test.lib.Platform;
-import jdk.test.lib.process.OutputAnalyzer;
-import jdk.test.lib.cds.CDSTestUtils;
-import jdk.test.lib.cds.CDSOptions;
+import java.io.File;
 import java.io.IOException;
-import java.io.File;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
-import jdk.test.lib.Asserts;
-import java.util.regex.Pattern;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Scanner;
 import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
 import jdk.internal.misc.Unsafe;
-import java.util.Scanner;
+
+import jdk.test.lib.Asserts;
+import jdk.test.lib.Platform;
+import jdk.test.lib.cds.CDSOptions;
+import jdk.test.lib.cds.CDSTestUtils;
+import jdk.test.lib.process.OutputAnalyzer;
+import jdk.test.lib.process.ProcessTools;
+import jdk.test.lib.SA.SATestUtils;
+
 import jtreg.SkippedException;
 
 class CrashApp {
@@ -102,6 +106,7 @@
 
             System.out.println(crashOut.getOutput());
             String crashOutputString = crashOut.getOutput();
+            SATestUtils.unzipCores(new File("."));
             String coreFileLocation = getCoreFileLocation(crashOutputString);
             if (coreFileLocation == null) {
                 if (Platform.isOSX()) {

--- a/test/hotspot/jtreg/serviceability/sa/TestJmapCore.java	Fri Sep 27 08:57:25 2019 -0700
+++ b/test/hotspot/jtreg/serviceability/sa/TestJmapCore.java	Fri Sep 27 10:48:23 2019 -0700
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2019, 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
@@ -29,19 +29,20 @@
  * @run driver/timeout=240 TestJmapCore run heap
  */
 
+import java.io.File;
+
 import jdk.test.lib.Asserts;
 import jdk.test.lib.JDKToolFinder;
 import jdk.test.lib.JDKToolLauncher;
 import jdk.test.lib.Platform;
+import jdk.test.lib.Utils;
 import jdk.test.lib.classloader.GeneratingClassLoader;
 import jdk.test.lib.hprof.HprofParser;
 import jdk.test.lib.process.ProcessTools;
 import jdk.test.lib.process.OutputAnalyzer;
-import jdk.test.lib.Utils;
+import jdk.test.lib.SA.SATestUtils;
 import jtreg.SkippedException;
 
-import java.io.File;
-
 public class TestJmapCore {
     static final String pidSeparator = ":KILLED_PID";
 
@@ -97,9 +98,11 @@
             ? ProcessTools.executeProcess(pb)
             : ProcessTools.executeProcess("sh", "-c", "ulimit -c unlimited && "
                     + ProcessTools.getCommandLine(pb));
+        File pwd = new File(".");
+        SATestUtils.unzipCores(pwd);
         File core;
         String pattern = Platform.isWindows() ? ".*\\.mdmp" : "core(\\.\\d+)?";
-        File[] cores = new File(".").listFiles((dir, name) -> name.matches(pattern));
+        File[] cores = pwd.listFiles((dir, name) -> name.matches(pattern));
         if (cores.length == 0) {
             // /cores/core.$pid might be generated on macosx by default
             String pid = output.firstMatch("^(\\d+)" + pidSeparator, 1);
@@ -110,7 +113,7 @@
         } else {
             Asserts.assertTrue(cores.length == 1,
                     "There are unexpected files containing core "
-                    + ": " + String.join(",", new File(".").list()) + ".");
+                    + ": " + String.join(",", pwd.list()) + ".");
             core = cores[0];
         }
         System.out.println("Found corefile: " + core.getAbsolutePath());

--- a/test/lib/jdk/test/lib/SA/SATestUtils.java	Fri Sep 27 08:57:25 2019 -0700
+++ b/test/lib/jdk/test/lib/SA/SATestUtils.java	Fri Sep 27 10:48:23 2019 -0700
@@ -22,12 +22,18 @@
  */
 package jdk.test.lib.SA;
 
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
 import java.io.IOException;
+import java.util.ArrayList;
 import java.util.List;
-import java.util.ArrayList;
+import java.util.concurrent.TimeUnit;
+import java.util.zip.GZIPInputStream;
+
 import jdk.test.lib.Asserts;
 import jdk.test.lib.Platform;
-import java.util.concurrent.TimeUnit;
+import jtreg.SkippedException;
 
 public class SATestUtils {
 
@@ -77,4 +83,22 @@
         outStringList.addAll(cmdStringList);
         return outStringList;
     }
+
+    public static void unzipCores(File dir) {
+        File[] gzCores = dir.listFiles((directory, name) -> name.matches("core(\\.\\d+)?\\.gz"));
+        for (File gzCore : gzCores) {
+            String coreFileName = gzCore.getName().replace(".gz", "");
+            System.out.println("Unzipping core into " + coreFileName);
+            try (GZIPInputStream gzis = new GZIPInputStream(new FileInputStream(gzCore));
+                 FileOutputStream fos = new FileOutputStream(coreFileName)) {
+                byte[] buffer = new byte[1024];
+                int length;
+                while ((length = gzis.read(buffer)) > 0) {
+                    fos.write(buffer, 0, length);
+                }
+            } catch (IOException e) {
+                throw new SkippedException("Not able to unzip file: " + gzCore.getAbsolutePath(), e);
+            }
+        }
+    }
 }