--- a/src/java.base/share/classes/java/util/jar/Attributes.java	Wed Sep 26 14:28:37 2018 +0200
+++ b/src/java.base/share/classes/java/util/jar/Attributes.java	Wed Sep 12 11:13:09 2018 +0200
@@ -369,8 +369,12 @@
      * Reads attributes from the specified input stream.
      * XXX Need to handle UTF8 values.
      */
+    void read(Manifest.FastInputStream is, byte[] lbuf) throws IOException {
+        read(is, lbuf, null, 0);
+    }
+
     @SuppressWarnings("deprecation")
-    void read(Manifest.FastInputStream is, byte[] lbuf) throws IOException {
+    int read(Manifest.FastInputStream is, byte[] lbuf, String filename, int lineNumber) throws IOException {
         String name = null, value;
         byte[] lastline = null;
 
@@ -378,8 +382,11 @@
         while ((len = is.readLine(lbuf)) != -1) {
             boolean lineContinued = false;
             byte c = lbuf[--len];
+            lineNumber++;
+
             if (c != '\n' && c != '\r') {
-                throw new IOException("line too long");
+                throw new IOException("line too long ("
+                            + Manifest.getErrorPosition(filename, lineNumber) + ")");
             }
             if (len > 0 && lbuf[len-1] == '\r') {
                 --len;
@@ -391,7 +398,8 @@
             if (lbuf[0] == ' ') {
                 // continuation of previous line
                 if (name == null) {
-                    throw new IOException("misplaced continuation line");
+                    throw new IOException("misplaced continuation line ("
+                                + Manifest.getErrorPosition(filename, lineNumber) + ")");
                 }
                 lineContinued = true;
                 byte[] buf = new byte[lastline.length + len - 1];
@@ -406,11 +414,13 @@
             } else {
                 while (lbuf[i++] != ':') {
                     if (i >= len) {
-                        throw new IOException("invalid header field");
+                        throw new IOException("invalid header field ("
+                                    + Manifest.getErrorPosition(filename, lineNumber) + ")");
                     }
                 }
                 if (lbuf[i++] != ' ') {
-                    throw new IOException("invalid header field");
+                    throw new IOException("invalid header field ("
+                                + Manifest.getErrorPosition(filename, lineNumber) + ")");
                 }
                 name = new String(lbuf, 0, 0, i - 2);
                 if (is.peek() == ' ') {
@@ -433,9 +443,11 @@
                                      + "entry in the jar file.");
                 }
             } catch (IllegalArgumentException e) {
-                throw new IOException("invalid header field name: " + name);
+                throw new IOException("invalid header field name: " + name
+                            + " (" + Manifest.getErrorPosition(filename, lineNumber) + ")");
             }
         }
+        return lineNumber;
     }
 
     /**

--- a/src/java.base/share/classes/java/util/jar/JarFile.java	Wed Sep 26 14:28:37 2018 +0200
+++ b/src/java.base/share/classes/java/util/jar/JarFile.java	Wed Sep 12 11:13:09 2018 +0200
@@ -417,12 +417,12 @@
             if (manEntry != null) {
                 if (verify) {
                     byte[] b = getBytes(manEntry);
-                    man = new Manifest(new ByteArrayInputStream(b));
+                    man = new Manifest(new ByteArrayInputStream(b), getName());
                     if (!jvInitialized) {
                         jv = new JarVerifier(b);
                     }
                 } else {
-                    man = new Manifest(super.getInputStream(manEntry));
+                    man = new Manifest(super.getInputStream(manEntry), getName());
                 }
                 manRef = new SoftReference<>(man);
             }

--- a/src/java.base/share/classes/java/util/jar/Manifest.java	Wed Sep 26 14:28:37 2018 +0200
+++ b/src/java.base/share/classes/java/util/jar/Manifest.java	Wed Sep 12 11:13:09 2018 +0200
@@ -25,14 +25,15 @@
 
 package java.util.jar;
 
+import java.io.DataOutputStream;
 import java.io.FilterInputStream;
-import java.io.DataOutputStream;
+import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
-import java.io.IOException;
+import java.util.HashMap;
 import java.util.Map;
-import java.util.HashMap;
-import java.util.Iterator;
+
+import sun.security.util.SecurityProperties;
 
 /**
  * The Manifest class is used to maintain Manifest entry names and their
@@ -47,16 +48,24 @@
  * @since   1.2
  */
 public class Manifest implements Cloneable {
+
+    private static final boolean jarInfoInExceptionText =
+        SecurityProperties.includedInExceptions("jar");
+
     // manifest main attributes
     private Attributes attr = new Attributes();
 
     // manifest entries
     private Map<String, Attributes> entries = new HashMap<>();
 
+    // name of the corresponding jar archive if available.
+    private final String jarFilename;
+
     /**
      * Constructs a new, empty Manifest.
      */
     public Manifest() {
+        jarFilename = null;
     }
 
     /**
@@ -66,15 +75,29 @@
      * @throws IOException if an I/O error has occurred
      */
     public Manifest(InputStream is) throws IOException {
+        this();
         read(is);
     }
 
     /**
+     * Constructs a new Manifest from the specified input stream.
+     *
+     * @param is the input stream containing manifest data
+     * @param jarFilename the name of the corresponding jar archive if available
+     * @throws IOException if an I/O error has occured
+     */
+    Manifest(InputStream is, String jarFilename) throws IOException {
+        read(is);
+        this.jarFilename = jarFilename;
+    }
+
+    /**
      * Constructs a new Manifest that is a copy of the specified Manifest.
      *
      * @param man the Manifest to copy
      */
     public Manifest(Manifest man) {
+        this();
         attr.putAll(man.getMainAttributes());
         entries.putAll(man.getEntries());
     }
@@ -179,6 +202,14 @@
         return;
     }
 
+    static String getErrorPosition(String filename, final int lineNumber) {
+        if (filename == null || !jarInfoInExceptionText) {
+            return "line " + lineNumber;
+        }
+
+        return "manifest of " + filename + ":" + lineNumber;
+    }
+
     /**
      * Reads the Manifest from the specified InputStream. The entry
      * names and attributes read will be merged in with the current
@@ -193,7 +224,7 @@
         // Line buffer
         byte[] lbuf = new byte[512];
         // Read the main attributes for the manifest
-        attr.read(fis, lbuf);
+        int lineNumber = attr.read(fis, lbuf, jarFilename, 0);
         // Total number of entries, attributes read
         int ecount = 0, acount = 0;
         // Average size of entry attributes
@@ -206,8 +237,11 @@
 
         while ((len = fis.readLine(lbuf)) != -1) {
             byte c = lbuf[--len];
+            lineNumber++;
+
             if (c != '\n' && c != '\r') {
-                throw new IOException("manifest line too long");
+                throw new IOException("manifest line too long ("
+                           + getErrorPosition(jarFilename, lineNumber) + ")");
             }
             if (len > 0 && lbuf[len-1] == '\r') {
                 --len;
@@ -220,7 +254,8 @@
             if (name == null) {
                 name = parseName(lbuf, len);
                 if (name == null) {
-                    throw new IOException("invalid manifest format");
+                    throw new IOException("invalid manifest format"
+                              + getErrorPosition(jarFilename, lineNumber) + ")");
                 }
                 if (fis.peek() == ' ') {
                     // name is wrapped
@@ -246,7 +281,7 @@
                 attr = new Attributes(asize);
                 entries.put(name, attr);
             }
-            attr.read(fis, lbuf);
+            lineNumber = attr.read(fis, lbuf, jarFilename, lineNumber);
             ecount++;
             acount += attr.size();
             //XXX: Fix for when the average is 0. When it is 0,

--- a/src/java.base/share/classes/sun/net/util/SocketExceptions.java	Wed Sep 26 14:28:37 2018 +0200
+++ b/src/java.base/share/classes/sun/net/util/SocketExceptions.java	Wed Sep 12 11:13:09 2018 +0200
@@ -30,43 +30,14 @@
 import java.net.InetSocketAddress;
 import java.security.AccessController;
 import java.security.PrivilegedAction;
-import java.security.Security;
+
+import sun.security.util.SecurityProperties;
 
 public final class SocketExceptions {
     private SocketExceptions() {}
 
-    /**
-     * Security or system property which specifies categories of
-     * (potentially sensitive) information that may be included
-     * in exception text. This class only defines one category:
-     * "hostInfo" which represents the hostname and port number
-     * of the remote peer relating to a socket exception.
-     * The property value is a comma separated list of
-     * case insignificant category names.
-     */
-    private static final String enhancedTextPropname = "jdk.includeInExceptions";
-
-    private static final boolean enhancedExceptionText = initTextProp();
-
-    private static boolean initTextProp() {
-        return AccessController.doPrivileged(new PrivilegedAction<Boolean>() {
-            public Boolean run() {
-                String val = System.getProperty(enhancedTextPropname);
-                if (val == null) {
-                    val = Security.getProperty(enhancedTextPropname);
-                    if (val == null)
-                        return false;
-                }
-                String[] tokens = val.split(",");
-                for (String token : tokens) {
-                    if (token.equalsIgnoreCase("hostinfo"))
-                        return true;
-                }
-                return false;
-            }
-        });
-    }
-
+    private static final boolean enhancedExceptionText =
+        SecurityProperties.includedInExceptions("hostInfo");
 
     /**
      * Utility which takes an exception and returns either the same exception
@@ -74,8 +45,9 @@
      * and detail message enhanced with addressing information from the
      * given InetSocketAddress.
      *
-     * If the system/security property "jdk.net.enhanceExceptionText" is not
-     * set or is false, then the original exception is returned.
+     * If the system/security property "jdk.includeInExceptions" is not
+     * set or does not contain the category hostInfo,
+     * then the original exception is returned.
      *
      * Only specific IOException subtypes are supported.
      */

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.base/share/classes/sun/security/util/SecurityProperties.java	Wed Sep 12 11:13:09 2018 +0200
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018 SAP SE. 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.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.
+ */
+
+package sun.security.util;
+
+import java.security.AccessController;
+import java.security.PrivilegedAction;
+import java.security.Security;
+
+public class SecurityProperties {
+
+    /**
+     * Returns the value of the security property propName, which can be overridden
+     * by a system property of the same name
+     *
+     * @param  propName the name of the system or security property
+     * @return the value of the system or security property
+     */
+    public static String privilegedGetOverridable(String propName) {
+        return AccessController.doPrivileged((PrivilegedAction<String>)
+            () -> {
+                String val = System.getProperty(propName);
+                if (val == null) {
+                    return Security.getProperty(propName);
+                } else {
+                    return val;
+                }
+            });
+    }
+
+    /**
+     * Returns true in case the system or security property "jdk.includeInExceptions"
+     * contains the category refName
+     *
+     * @param refName the category to check
+     * @return true in case the system or security property "jdk.includeInExceptions"
+     *         contains refName, false otherwise
+     */
+    public static boolean includedInExceptions(String refName) {
+        String val = privilegedGetOverridable("jdk.includeInExceptions");
+        if (val == null) {
+            return false;
+        }
+
+        String[] tokens = val.split(",");
+        for (String token : tokens) {
+            token = token.trim();
+            if (token.equalsIgnoreCase(refName)) {
+                return true;
+            }
+        }
+        return false;
+    }
+}

--- a/src/java.base/share/conf/security/java.security	Wed Sep 26 14:28:37 2018 +0200
+++ b/src/java.base/share/conf/security/java.security	Wed Sep 12 11:13:09 2018 +0200
@@ -1081,7 +1081,10 @@
 #             java.nio.channels package will contain enhanced exception
 #             message information
 #
+#  jar      - enables more detailed information in the IOExceptions thrown
+#             by classes in the java.util.jar package
+#
 # The property setting in this file can be overridden by a system property of
 # the same name, with the same syntax and possible values.
 #
-#jdk.includeInExceptions=hostInfo
+#jdk.includeInExceptions=hostInfo,jar