7154822: forward port fix for Bug 13645891 to JDK8 jcmd (1024 byte file size limit issue)

Summary: Changed so that jcmd breaks input into individual lines and sends each one to the jvm separately.
Reviewed-by: dcubed, sla

src/share/classes/sun/tools/jcmd/JCmd.java

 /*
- * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *com.sun.tools.attach.AttachNotSupportedException
 
@@ -142,17 +142,20 @@ public class JCmd {
         // Cast to HotSpotVirtualMachine as this is an
         // implementation specific method.
         HotSpotVirtualMachine hvm = (HotSpotVirtualMachine) vm;
-        try (InputStream in = hvm.executeJCmd(command);) {
-            // read to EOF and just print output
-            byte b[] = new byte[256];
-            int n;
-            do {
-                n = in.read(b);
-                if (n > 0) {
-                    String s = new String(b, 0, n, "UTF-8");
-                    System.out.print(s);
-                }
-            } while (n > 0);
+        String lines[] = command .split("\\n");
+        for (String line : lines) {
+            try (InputStream in = hvm.executeJCmd(line);) {
+                // read to EOF and just print output
+                byte b[] = new byte[256];
+                int n;
+                do {
+                    n = in.read(b);
+                    if (n > 0) {
+                        String s = new String(b, 0, n, "UTF-8");
+                        System.out.print(s);
+                    }
+                } while (n > 0);
+            }
         }
         vm.detach();
     }

test/sun/tools/jcmd/dcmd-big-script.txt

+VM.version
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test/sun/tools/jcmd/jcmd-big-script.sh

+#!/bin/sh
+
+#
+# Copyright (c) 2012, 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.
+#
+
+
+# @test
+# @bug 7154822
+# @summary test if we can send a file over 1024 bytes large via jcmd -f
+# @author David Buck
+#
+# @library ../common
+# @build SimpleApplication ShutdownSimpleApplication
+# @run shell jcmd-big-script.sh
+
+. ${TESTSRC}/../common/CommonSetup.sh
+. ${TESTSRC}/../common/ApplicationSetup.sh
+
+# Start application and use PORTFILE for coordination
+PORTFILE="${TESTCLASSES}"/shutdown.port
+startApplication SimpleApplication "${PORTFILE}"
+
+failed=0;
+
+# -f <script>
+rm -f jcmd.out 2>/dev/null
+set +e # even if jcmd fails, we do not want abort the script yet.
+${JCMD} -J-XX:+UsePerfData $appJavaPid -f ${TESTSRC}/dcmd-big-script.txt > jcmd.out 2>&1
+status="$?"
+set -e
+if [ "$status" != 0 ]; then
+  echo "jcmd command returned non-zero exit code (status=$status). Failed."
+  failed=1;
+fi
+cat jcmd.out
+set +e # if the test passes, grep will "fail" with an exit code of 1
+grep Exception jcmd.out > /dev/null 2>&1
+status="$?"
+set -e
+if [ "$status" = 0 ]; then
+  echo "Output of \"jcmd [pid] -f dcmd-big-script.txt\" contains string \"Exception\". Failed."
+  failed=1;
+fi
+
+# clean up
+rm -f jcmd.out 2>/dev/null
+stopApplication "${PORTFILE}"
+waitForApplication
+
+exit $failed