changeset 8769:ec31188f66ec

Merge
author coleenp
date Thu, 23 Jul 2015 22:31:10 -0400
parents 914260b6c59c 89439edc81e4
children b63160fcde1c
files agent/src/share/classes/sun/jvm/hotspot/gc/g1/G1Allocator.java src/share/vm/classfile/javaClasses.cpp
diffstat 55 files changed, 1692 insertions(+), 705 deletions(-) [+]
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/agent/src/share/classes/sun/jvm/hotspot/SAGetopt.java	Thu Jul 23 22:31:10 2015 -0400
@@ -0,0 +1,162 @@
+/*
+ * Copyright (c) 2015, 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.
+ *
+ */
+
+package sun.jvm.hotspot;
+
+import java.util.Arrays;
+import java.util.List;
+
+public class SAGetopt {
+
+    private String[] _argv;
+
+    private int _optind;    // index in arguments array
+    private int _optopt;    // index within an argument
+    private String _optarg; // last option argument
+    private boolean _optreset; // special handling of first call
+
+    public SAGetopt(String[] args) {
+        _argv  = args;
+        _optind   = 0;
+        _optopt   = 1;
+        _optarg   = null;
+        _optreset = true;
+    }
+
+    public String getOptarg() {
+        return _optarg;
+    }
+
+    public int getOptind() {
+        return _optind;
+    }
+
+    private void extractOptarg(String opt) {
+        // Argument expected
+        if (_optind > _argv.length) {
+            throw new RuntimeException("Not enough arguments for '" + opt + "'");
+        }
+
+        if (! _argv[_optind].isEmpty() && _argv[_optind].charAt(0) == '-') {
+            throw new RuntimeException("Argument is expected for '" + opt + "'");
+        }
+
+        _optarg = _argv[_optind];
+        _optind += 1;
+    }
+
+    private String processLongOptions(String carg, String[] longOptStr) {
+        List<String> los = Arrays.asList(longOptStr);
+        String[] ca = carg.split("=", 2);
+
+        if (los.contains(ca[0])) {
+            if (ca.length > 1) {
+                throw new RuntimeException("Argument is not expected for '" + ca[0] + "'");
+            }
+            return carg;
+        }
+
+        if (los.contains(ca[0] + "=")) {
+            if (ca.length > 1) {
+                // GNU style options --file=name
+                _optarg = ca[1];
+            }
+            else {
+                // Mixed style options --file name
+                extractOptarg(ca[0]);
+            }
+
+            return ca[0];
+        }
+
+        throw new RuntimeException("Invalid option '" + ca[0] + "'");
+    }
+
+    public String next(String optStr, String[] longOptStr) {
+
+        if (_optind >= _argv.length || _argv[_optind] == null) {
+            // All arguments processed
+            return null;
+        }
+
+        String carg = _argv[_optind];
+        _optarg = null;
+
+        if (_optreset) {
+            // End of option batch like '-abc' reached, expect option to start from '-'
+
+            if (carg.isEmpty() || carg.charAt(0) != '-' || carg.equals("--")) {
+                // Stop processing on -- or first non-option argument;
+                return null;
+            }
+
+            if (carg.startsWith("--")) {
+                // Handle long options, it can't be combined so it's simple
+                if (longOptStr == null || longOptStr.length == 0) {
+                    // No long options expected, stop options processing
+                    return null;
+                }
+                ++ _optind;
+
+                // at this point carg contains at least one character besides --
+                carg = carg.substring(2);
+                return processLongOptions(carg, longOptStr);
+            }
+
+            if (optStr == null || optStr.length() == 0) {
+                // No short options
+                return null;
+            }
+
+            // At this point carg[0] contains '-'
+            _optreset = false;
+            _optopt = 1;
+        }
+
+        char ch = carg.charAt(_optopt);
+
+        // adjust pointer to next character
+        _optopt += 1;
+
+        // Okay, ready to process options like
+        // -abc -d bla -ef
+
+        int chIndex = optStr.indexOf(ch);
+        if (chIndex == -1) {
+            throw new RuntimeException("Invalid option '" + ch + "'");
+        }
+
+        if (_optopt >= carg.length()) {
+            _optind += 1;
+            _optreset = true;
+        }
+
+        if (chIndex < optStr.length()-1 && optStr.charAt(chIndex+1) == ':') {
+            // Argument expected
+            extractOptarg(String.valueOf(ch));
+        }
+
+        return String.valueOf(ch);
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/agent/src/share/classes/sun/jvm/hotspot/SALauncher.java	Thu Jul 23 22:31:10 2015 -0400
@@ -0,0 +1,359 @@
+/*
+ * Copyright (c) 2015, 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.
+ *
+ */
+
+package sun.jvm.hotspot;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+
+import sun.jvm.hotspot.tools.JStack;
+import sun.jvm.hotspot.tools.JMap;
+import sun.jvm.hotspot.tools.JInfo;
+
+public class SALauncher {
+
+    private static boolean launcherHelp() {
+        System.out.println("    clhsdb       \tcommand line debugger");
+        System.out.println("    hsdb         \tui debugger");
+        System.out.println("    jstack --help\tto get more information");
+        System.out.println("    jmap   --help\tto get more information");
+        System.out.println("    jinfo  --help\tto get more information");
+        return false;
+    }
+
+    private static boolean commonHelp() {
+        // --pid <pid>
+        // --exe <exe>
+        // --core <core>
+        System.out.println("    --exe\texecutable image name");
+        System.out.println("    --core\tpath to coredump");
+        System.out.println("    --pid\tpid of process to attach");
+        return false;
+    }
+
+    private static boolean jinfoHelp() {
+        // --flags -> -flags
+        // --sysprops -> -sysprops
+        System.out.println("    --flags\tto print VM flags");
+        System.out.println("    --sysprops\tto print Java System properties");
+        System.out.println("    <no option>\tto print both of the above");
+        return commonHelp();
+    }
+
+    private static boolean jmapHelp() {
+        // --heap -> -heap
+        // --binaryheap -> -heap:format=b
+        // --histo -> -histo
+        // --clstats -> -clstats
+        // --finalizerinfo -> -finalizerinfo
+
+        System.out.println("    <no option>\tto print same info as Solaris pmap");
+        System.out.println("    --heap\tto print java heap summary");
+        System.out.println("    --binaryheap\tto dump java heap in hprof binary format");
+        System.out.println("    --histo\tto print histogram of java object heap");
+        System.out.println("    --clstats\tto print class loader statistics");
+        System.out.println("    --finalizerinfo\tto print information on objects awaiting finalization");
+        return commonHelp();
+    }
+
+    private static boolean jstackHelp() {
+        // --locks -> -l
+        // --mixed -> -m
+        System.out.println("    --locks\tto print java.util.concurrent locks");
+        System.out.println("    --mixed\tto print both java and native frames (mixed mode)");
+        return commonHelp();
+    }
+
+    private static boolean toolHelp(String toolName) {
+        if (toolName.equals("jstack")) {
+            return jstackHelp();
+        }
+        if (toolName.equals("jinfo")) {
+            return jinfoHelp();
+        }
+        if (toolName.equals("jmap")) {
+            return jmapHelp();
+        }
+        if (toolName.equals("hsdb") || toolName.equals("clhsdb")) {
+            return commonHelp();
+        }
+        return launcherHelp();
+    }
+
+    private static void runCLHSDB(String[] oldArgs) {
+        SAGetopt sg = new SAGetopt(oldArgs);
+        String[] longOpts = {"exe=", "core=", "pid="};
+
+        ArrayList<String> newArgs = new ArrayList();
+        String exeORpid = null;
+        String core = null;
+        String s = null;
+
+        while((s = sg.next(null, longOpts)) != null) {
+            if (s.equals("exe")) {
+                exeORpid = sg.getOptarg();
+                continue;
+            }
+            if (s.equals("core")) {
+                core = sg.getOptarg();
+                continue;
+            }
+            if (s.equals("pid")) {
+                exeORpid = sg.getOptarg();
+                continue;
+            }
+        }
+
+        if (exeORpid != null) {
+            newArgs.add(exeORpid);
+            if (core != null) {
+                newArgs.add(core);
+            }
+        }
+        CLHSDB.main(newArgs.toArray(new String[newArgs.size()]));
+    }
+
+    private static void runHSDB(String[] oldArgs) {
+        SAGetopt sg = new SAGetopt(oldArgs);
+        String[] longOpts = {"exe=", "core=", "pid="};
+
+        ArrayList<String> newArgs = new ArrayList();
+        String exeORpid = null;
+        String core = null;
+        String s = null;
+
+        while((s = sg.next(null, longOpts)) != null) {
+            if (s.equals("exe")) {
+                exeORpid = sg.getOptarg();
+                continue;
+            }
+            if (s.equals("core")) {
+                core = sg.getOptarg();
+                continue;
+            }
+            if (s.equals("pid")) {
+                exeORpid = sg.getOptarg();
+                continue;
+            }
+        }
+
+        if (exeORpid != null) {
+            newArgs.add(exeORpid);
+            if (core != null) {
+                newArgs.add(core);
+            }
+        }
+        HSDB.main(newArgs.toArray(new String[newArgs.size()]));
+    }
+
+    private static void runJSTACK(String[] oldArgs) {
+        SAGetopt sg = new SAGetopt(oldArgs);
+        String[] longOpts = {"exe=", "core=", "pid=",
+                                 "mixed", "locks"};
+
+        ArrayList<String> newArgs = new ArrayList();
+        String exeORpid = null;
+        String core = null;
+        String s = null;
+
+        while((s = sg.next(null, longOpts)) != null) {
+            if (s.equals("exe")) {
+                exeORpid = sg.getOptarg();
+                continue;
+            }
+            if (s.equals("core")) {
+                core = sg.getOptarg();
+                continue;
+            }
+            if (s.equals("pid")) {
+                exeORpid = sg.getOptarg();
+                continue;
+            }
+            if (s.equals("mixed")) {
+                newArgs.add("-m");
+                continue;
+            }
+            if (s.equals("locks")) {
+                newArgs.add("-l");
+                continue;
+            }
+        }
+
+        if (exeORpid != null) {
+            newArgs.add(exeORpid);
+            if (core != null) {
+                newArgs.add(core);
+            }
+        }
+
+        JStack.main(newArgs.toArray(new String[newArgs.size()]));
+    }
+
+    private static void runJMAP(String[] oldArgs) {
+        SAGetopt sg = new SAGetopt(oldArgs);
+        String[] longOpts = {"exe=", "core=", "pid=",
+              "heap", "binaryheap", "histo", "clstats", "finalizerinfo"};
+
+        ArrayList<String> newArgs = new ArrayList();
+        String exeORpid = null;
+        String core = null;
+        String s = null;
+
+        while((s = sg.next(null, longOpts)) != null) {
+            if (s.equals("exe")) {
+                exeORpid = sg.getOptarg();
+                continue;
+            }
+            if (s.equals("core")) {
+                core = sg.getOptarg();
+                continue;
+            }
+            if (s.equals("pid")) {
+                exeORpid = sg.getOptarg();
+                continue;
+            }
+            if (s.equals("heap")) {
+                newArgs.add("-heap");
+                continue;
+            }
+            if (s.equals("binaryheap")) {
+                newArgs.add("-heap:format=b");
+                continue;
+            }
+            if (s.equals("histo")) {
+                newArgs.add("-histo");
+                continue;
+            }
+            if (s.equals("clstats")) {
+                newArgs.add("-clstats");
+                continue;
+            }
+            if (s.equals("finalizerinfo")) {
+                newArgs.add("-finalizerinfo");
+                continue;
+            }
+        }
+
+        if (exeORpid != null) {
+            newArgs.add(exeORpid);
+            if (core != null) {
+                newArgs.add(core);
+            }
+        }
+
+        JMap.main(newArgs.toArray(new String[newArgs.size()]));
+    }
+
+    private static void runJINFO(String[] oldArgs) {
+        SAGetopt sg = new SAGetopt(oldArgs);
+        String[] longOpts = {"exe=", "core=", "pid=",
+                                     "flags", "sysprops"};
+
+        ArrayList<String> newArgs = new ArrayList();
+        String exeORpid = null;
+        String core = null;
+        String s = null;
+
+        while((s = sg.next(null, longOpts)) != null) {
+            if (s.equals("exe")) {
+                exeORpid = sg.getOptarg();
+                continue;
+            }
+            if (s.equals("core")) {
+                core = sg.getOptarg();
+                continue;
+            }
+            if (s.equals("pid")) {
+                exeORpid = sg.getOptarg();
+                continue;
+            }
+            if (s.equals("flags")) {
+                newArgs.add("-flags");
+                continue;
+            }
+            if (s.equals("sysprops")) {
+                newArgs.add("-sysprops");
+                continue;
+            }
+        }
+
+        if (exeORpid != null) {
+            newArgs.add(exeORpid);
+            if (core != null) {
+                newArgs.add(core);
+            }
+        }
+
+        JInfo.main(newArgs.toArray(new String[newArgs.size()]));
+    }
+
+    public static void main(String[] args) {
+        // Provide a help
+        if (args.length == 0) {
+            launcherHelp();
+            return;
+        }
+        // No arguments imply help for jstack, jmap, jinfo but launch clhsdb and hsdb
+        if (args.length == 1 && !args[0].equals("clhsdb") && !args[0].equals("hsdb")) {
+            toolHelp(args[0]);
+            return;
+        }
+
+        for (String arg : args) {
+            if (arg.equals("-h") || arg.equals("-help") || arg.equals("--help")) {
+                toolHelp(args[0]);
+                return;
+            }
+        }
+
+        String[] oldArgs = Arrays.copyOfRange(args, 1, args.length);
+
+        // Run SA interactive mode
+        if (args[0].equals("clhsdb")) {
+            runCLHSDB(oldArgs);
+            return;
+        }
+
+        if (args[0].equals("hsdb")) {
+            runHSDB(oldArgs);
+            return;
+        }
+
+        // Run SA tmtools mode
+        if (args[0].equals("jstack")) {
+            runJSTACK(oldArgs);
+            return;
+        }
+
+        if (args[0].equals("jmap")) {
+            runJMAP(oldArgs);
+            return;
+        }
+
+        if (args[0].equals("jinfo")) {
+            runJINFO(oldArgs);
+            return;
+        }
+    }
+}
--- a/agent/src/share/classes/sun/jvm/hotspot/debugger/aarch64/AARCH64ThreadContext.java	Thu Jul 23 15:18:56 2015 -0400
+++ b/agent/src/share/classes/sun/jvm/hotspot/debugger/aarch64/AARCH64ThreadContext.java	Thu Jul 23 22:31:10 2015 -0400
@@ -37,6 +37,21 @@
 public abstract class AARCH64ThreadContext implements ThreadContext {
     // Taken from /usr/include/asm/sigcontext.h on Linux/AARCH64.
 
+    //  /*
+    //   * Signal context structure - contains all info to do with the state
+    //   * before the signal handler was invoked.
+    //   */
+    // struct sigcontext {
+    //         __u64 fault_address;
+    //         /* AArch64 registers */
+    //          __u64 regs[31];
+    //          __u64 sp;
+    //          __u64 pc;
+    //          __u64 pstate;
+    //          /* 4K reserved for FP/SIMD state and future expansion */
+    //          __u8 __reserved[4096] __attribute__((__aligned__(16)));
+    //  };
+
     // NOTE: the indices for the various registers must be maintained as
     // listed across various operating systems. However, only a small
     // subset of the registers' values are guaranteed to be present (and
@@ -78,8 +93,9 @@
     public static final int LR = 30;
     public static final int SP = 31;
     public static final int PC = 32;
+    public static final int PSTATE = 33;
 
-    public static final int NPRGREG = 33;
+    public static final int NPRGREG = 34;
 
     private long[] data;
 
--- a/agent/src/share/classes/sun/jvm/hotspot/gc/g1/G1Allocator.java	Thu Jul 23 15:18:56 2015 -0400
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,40 +0,0 @@
-package sun.jvm.hotspot.gc.g1;
-
-import java.util.Observable;
-import java.util.Observer;
-
-import sun.jvm.hotspot.debugger.Address;
-import sun.jvm.hotspot.runtime.VM;
-import sun.jvm.hotspot.runtime.VMObject;
-import sun.jvm.hotspot.types.CIntegerField;
-import sun.jvm.hotspot.types.Type;
-import sun.jvm.hotspot.types.TypeDataBase;
-
-public class G1Allocator extends VMObject {
-
-  //size_t _summary_bytes_used;
-  static private CIntegerField summaryBytesUsedField;
-
-  static {
-    VM.registerVMInitializedObserver(new Observer() {
-      public void update(Observable o, Object data) {
-        initialize(VM.getVM().getTypeDataBase());
-      }
-    });
-  }
-
-  static private synchronized void initialize(TypeDataBase db) {
-    Type type = db.lookupType("G1Allocator");
-
-    summaryBytesUsedField = type.getCIntegerField("_summary_bytes_used");
-  }
-
-  public long getSummaryBytes() {
-    return summaryBytesUsedField.getValue(addr);
-  }
-
-  public G1Allocator(Address addr) {
-    super(addr);
-
-  }
-}
--- a/agent/src/share/classes/sun/jvm/hotspot/gc/g1/G1CollectedHeap.java	Thu Jul 23 15:18:56 2015 -0400
+++ b/agent/src/share/classes/sun/jvm/hotspot/gc/g1/G1CollectedHeap.java	Thu Jul 23 22:31:10 2015 -0400
@@ -36,6 +36,7 @@
 import sun.jvm.hotspot.runtime.VM;
 import sun.jvm.hotspot.runtime.VMObjectFactory;
 import sun.jvm.hotspot.types.AddressField;
+import sun.jvm.hotspot.types.CIntegerField;
 import sun.jvm.hotspot.types.Type;
 import sun.jvm.hotspot.types.TypeDataBase;
 
@@ -46,8 +47,8 @@
     static private long hrmFieldOffset;
     // MemRegion _g1_reserved;
     static private long g1ReservedFieldOffset;
-    // G1Allocator* _allocator
-    static private AddressField g1Allocator;
+    // size_t _summary_bytes_used;
+    static private CIntegerField summaryBytesUsedField;
     // G1MonitoringSupport* _g1mm;
     static private AddressField g1mmField;
     // HeapRegionSet _old_set;
@@ -67,7 +68,7 @@
         Type type = db.lookupType("G1CollectedHeap");
 
         hrmFieldOffset = type.getField("_hrm").getOffset();
-        g1Allocator = type.getAddressField("_allocator");
+        summaryBytesUsedField = type.getCIntegerField("_summary_bytes_used");
         g1mmField = type.getAddressField("_g1mm");
         oldSetFieldOffset = type.getField("_old_set").getOffset();
         humongousSetFieldOffset = type.getField("_humongous_set").getOffset();
@@ -78,7 +79,7 @@
     }
 
     public long used() {
-        return allocator().getSummaryBytes();
+        return summaryBytesUsedField.getValue(addr);
     }
 
     public long n_regions() {
@@ -96,11 +97,6 @@
         return (G1MonitoringSupport) VMObjectFactory.newObject(G1MonitoringSupport.class, g1mmAddr);
     }
 
-    public G1Allocator allocator() {
-        Address g1AllocatorAddr = g1Allocator.getValue(addr);
-        return (G1Allocator) VMObjectFactory.newObject(G1Allocator.class, g1AllocatorAddr);
-    }
-
     public HeapRegionSetBase oldSet() {
         Address oldSetAddr = addr.addOffsetTo(oldSetFieldOffset);
         return (HeapRegionSetBase) VMObjectFactory.newObject(HeapRegionSetBase.class,
--- a/src/os/aix/vm/os_aix.cpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/os/aix/vm/os_aix.cpp	Thu Jul 23 22:31:10 2015 -0400
@@ -1550,6 +1550,13 @@
   LoadedLibraries::print(st);
 }
 
+void os::get_summary_os_info(char* buf, size_t buflen) {
+  // There might be something more readable than uname results for AIX.
+  struct utsname name;
+  uname(&name);
+  snprintf(buf, buflen, "%s %s", name.release, name.version);
+}
+
 void os::print_os_info(outputStream* st) {
   st->print("OS:");
 
@@ -1654,6 +1661,17 @@
   }
 }
 
+// Get a string for the cpuinfo that is a summary of the cpu type
+void os::get_summary_cpu_info(char* buf, size_t buflen) {
+  // This looks good
+  os::Aix::cpuinfo_t ci;
+  if (os::Aix::get_cpuinfo(&ci)) {
+    strncpy(buf, ci.version, buflen);
+  } else {
+    strncpy(buf, "AIX", buflen);
+  }
+}
+
 void os::pd_print_cpu_info(outputStream* st, char* buf, size_t buflen) {
 }
 
--- a/src/os/bsd/vm/os_bsd.cpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/os/bsd/vm/os_bsd.cpp	Thu Jul 23 22:31:10 2015 -0400
@@ -1600,24 +1600,6 @@
   return dlsym(handle, name);
 }
 
-
-static bool _print_ascii_file(const char* filename, outputStream* st) {
-  int fd = ::open(filename, O_RDONLY);
-  if (fd == -1) {
-    return false;
-  }
-
-  char buf[32];
-  int bytes;
-  while ((bytes = ::read(fd, buf, sizeof(buf))) > 0) {
-    st->print_raw(buf, bytes);
-  }
-
-  ::close(fd);
-
-  return true;
-}
-
 int _print_dll_info_cb(const char * name, address base_address, address top_address, void * param) {
   outputStream * out = (outputStream *) param;
   out->print_cr(PTR_FORMAT " \t%s", base_address, name);
@@ -1678,15 +1660,38 @@
 #endif
 }
 
+void os::get_summary_os_info(char* buf, size_t buflen) {
+  // These buffers are small because we want this to be brief
+  // and not use a lot of stack while generating the hs_err file.
+  char os[100];
+  size_t size = sizeof(os);
+  int mib_kern[] = { CTL_KERN, KERN_OSTYPE };
+  if (sysctl(mib_kern, 2, os, &size, NULL, 0) < 0) {
+#ifdef __APPLE__
+      strncpy(os, "Darwin", sizeof(os));
+#elif __OpenBSD__
+      strncpy(os, "OpenBSD", sizeof(os));
+#else
+      strncpy(os, "BSD", sizeof(os));
+#endif
+  }
+
+  char release[100];
+  size = sizeof(release);
+  int mib_release[] = { CTL_KERN, KERN_OSRELEASE };
+  if (sysctl(mib_release, 2, release, &size, NULL, 0) < 0) {
+      // if error, leave blank
+      strncpy(release, "", sizeof(release));
+  }
+  snprintf(buf, buflen, "%s %s", os, release);
+}
+
 void os::print_os_info_brief(outputStream* st) {
-  st->print("Bsd");
-
   os::Posix::print_uname_info(st);
 }
 
 void os::print_os_info(outputStream* st) {
   st->print("OS:");
-  st->print("Bsd");
 
   os::Posix::print_uname_info(st);
 
@@ -1699,6 +1704,33 @@
   // Nothing to do for now.
 }
 
+void os::get_summary_cpu_info(char* buf, size_t buflen) {
+  unsigned int mhz;
+  size_t size = sizeof(mhz);
+  int mib[] = { CTL_HW, HW_CPU_FREQ };
+  if (sysctl(mib, 2, &mhz, &size, NULL, 0) < 0) {
+    mhz = 1;  // looks like an error but can be divided by
+  } else {
+    mhz /= 1000000;  // reported in millions
+  }
+
+  char model[100];
+  size = sizeof(model);
+  int mib_model[] = { CTL_HW, HW_MODEL };
+  if (sysctl(mib_model, 2, model, &size, NULL, 0) < 0) {
+    strncpy(model, cpu_arch, sizeof(model));
+  }
+
+  char machine[100];
+  size = sizeof(machine);
+  int mib_machine[] = { CTL_HW, HW_MACHINE };
+  if (sysctl(mib_machine, 2, machine, &size, NULL, 0) < 0) {
+      strncpy(machine, "", sizeof(machine));
+  }
+
+  snprintf(buf, buflen, "%s %s %d MHz", model, machine, mhz);
+}
+
 void os::print_memory_info(outputStream* st) {
 
   st->print("Memory:");
@@ -1709,11 +1741,6 @@
   st->print("(" UINT64_FORMAT "k free)",
             os::available_memory() >> 10);
   st->cr();
-
-  // meminfo
-  st->print("\n/proc/meminfo:\n");
-  _print_ascii_file("/proc/meminfo", st);
-  st->cr();
 }
 
 void os::print_siginfo(outputStream* st, void* siginfo) {
--- a/src/os/linux/vm/os_linux.cpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/os/linux/vm/os_linux.cpp	Thu Jul 23 22:31:10 2015 -0400
@@ -2043,29 +2043,94 @@
 // Searching for the debian_version file is the last resort.  It contains
 // an informative string like "6.0.6" or "wheezy/sid". Because of this
 // "Debian " is printed before the contents of the debian_version file.
+
+const char* distro_files[] = {
+  "/etc/oracle-release",
+  "/etc/mandriva-release",
+  "/etc/mandrake-release",
+  "/etc/sun-release",
+  "/etc/redhat-release",
+  "/etc/lsb-release",
+  "/etc/SuSE-release",
+  "/etc/turbolinux-release",
+  "/etc/gentoo-release",
+  "/etc/ltib-release",
+  "/etc/angstrom-version",
+  "/etc/system-release",
+  "/etc/os-release",
+  NULL };
+
 void os::Linux::print_distro_info(outputStream* st) {
-  if (!_print_ascii_file("/etc/oracle-release", st) &&
-      !_print_ascii_file("/etc/mandriva-release", st) &&
-      !_print_ascii_file("/etc/mandrake-release", st) &&
-      !_print_ascii_file("/etc/sun-release", st) &&
-      !_print_ascii_file("/etc/redhat-release", st) &&
-      !_print_ascii_file("/etc/lsb-release", st) &&
-      !_print_ascii_file("/etc/SuSE-release", st) &&
-      !_print_ascii_file("/etc/turbolinux-release", st) &&
-      !_print_ascii_file("/etc/gentoo-release", st) &&
-      !_print_ascii_file("/etc/ltib-release", st) &&
-      !_print_ascii_file("/etc/angstrom-version", st) &&
-      !_print_ascii_file("/etc/system-release", st) &&
-      !_print_ascii_file("/etc/os-release", st)) {
-
-    if (file_exists("/etc/debian_version")) {
-      st->print("Debian ");
-      _print_ascii_file("/etc/debian_version", st);
+  for (int i = 0;; i++) {
+    const char* file = distro_files[i];
+    if (file == NULL) {
+      break;  // done
+    }
+    // If file prints, we found it.
+    if (_print_ascii_file(file, st)) {
+      return;
+    }
+  }
+
+  if (file_exists("/etc/debian_version")) {
+    st->print("Debian ");
+    _print_ascii_file("/etc/debian_version", st);
+  } else {
+    st->print("Linux");
+  }
+  st->cr();
+}
+
+static void parse_os_info(char* distro, size_t length, const char* file) {
+  FILE* fp = fopen(file, "r");
+  if (fp != NULL) {
+    char buf[256];
+    // get last line of the file.
+    while (fgets(buf, sizeof(buf), fp)) { }
+    // Edit out extra stuff in expected ubuntu format
+    if (strstr(buf, "DISTRIB_DESCRIPTION=") != NULL) {
+      char* ptr = strstr(buf, "\"");  // the name is in quotes
+      if (ptr != NULL) {
+        ptr++; // go beyond first quote
+        char* nl = strchr(ptr, '\"');
+        if (nl != NULL) *nl = '\0';
+        strncpy(distro, ptr, length);
+      } else {
+        ptr = strstr(buf, "=");
+        ptr++; // go beyond equals then
+        char* nl = strchr(ptr, '\n');
+        if (nl != NULL) *nl = '\0';
+        strncpy(distro, ptr, length);
+      }
     } else {
-      st->print("Linux");
+      // if not in expected Ubuntu format, print out whole line minus \n
+      char* nl = strchr(buf, '\n');
+      if (nl != NULL) *nl = '\0';
+      strncpy(distro, buf, length);
     }
-  }
-  st->cr();
+    // close distro file
+    fclose(fp);
+  }
+}
+
+void os::get_summary_os_info(char* buf, size_t buflen) {
+  for (int i = 0;; i++) {
+    const char* file = distro_files[i];
+    if (file == NULL) {
+      break; // ran out of distro_files
+    }
+    if (file_exists(file)) {
+      parse_os_info(buf, buflen, file);
+      return;
+    }
+  }
+  // special case for debian
+  if (file_exists("/etc/debian_version")) {
+    strncpy(buf, "Debian ", buflen);
+    parse_os_info(&buf[7], buflen-7, "/etc/debian_version");
+  } else {
+    strncpy(buf, "Linux", buflen);
+  }
 }
 
 void os::Linux::print_libversion_info(outputStream* st) {
@@ -2150,6 +2215,48 @@
   }
 }
 
+const char* search_string = IA32_ONLY("model name") AMD64_ONLY("model name")
+                            IA64_ONLY("") SPARC_ONLY("cpu")
+                            ARM32_ONLY("Processor") PPC_ONLY("Processor") AARCH64_ONLY("Processor");
+
+// Parses the cpuinfo file for string representing the model name.
+void os::get_summary_cpu_info(char* cpuinfo, size_t length) {
+  FILE* fp = fopen("/proc/cpuinfo", "r");
+  if (fp != NULL) {
+    while (!feof(fp)) {
+      char buf[256];
+      if (fgets(buf, sizeof(buf), fp)) {
+        char* start = strstr(buf, search_string);
+        if (start != NULL) {
+          char *ptr = start + strlen(search_string);
+          char *end = buf + strlen(buf);
+          while (ptr != end) {
+             // skip whitespace and colon for the rest of the name.
+             if (*ptr != ' ' && *ptr != '\t' && *ptr != ':') {
+               break;
+             }
+             ptr++;
+          }
+          if (ptr != end) {
+            // reasonable string, get rid of newline and keep the rest
+            char* nl = strchr(buf, '\n');
+            if (nl != NULL) *nl = '\0';
+            strncpy(cpuinfo, ptr, length);
+            fclose(fp);
+            return;
+          }
+        }
+      }
+    }
+    fclose(fp);
+  }
+  // cpuinfo not found or parsing failed, just print generic string.  The entire
+  // /proc/cpuinfo file will be printed later in the file (or enough of it for x86)
+  strncpy(cpuinfo, IA32_ONLY("x86_32") AMD64_ONLY("x86_32")
+                   IA64_ONLY("IA64") SPARC_ONLY("sparcv9")
+                   ARM32_ONLY("ARM") PPC_ONLY("PPC64") AARCH64_ONLY("AArch64"), length);
+}
+
 void os::print_siginfo(outputStream* st, void* siginfo) {
   const siginfo_t* si = (const siginfo_t*)siginfo;
 
--- a/src/os/posix/vm/os_posix.cpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/os/posix/vm/os_posix.cpp	Thu Jul 23 22:31:10 2015 -0400
@@ -236,6 +236,15 @@
   st->cr();
 }
 
+#ifndef PRODUCT
+bool os::get_host_name(char* buf, size_t buflen) {
+  struct utsname name;
+  uname(&name);
+  jio_snprintf(buf, buflen, "%s", name.nodename);
+  return true;
+}
+#endif // PRODUCT
+
 bool os::has_allocatable_memory_limit(julong* limit) {
   struct rlimit rlim;
   int getrlimit_res = getrlimit(RLIMIT_AS, &rlim);
--- a/src/os/solaris/vm/os_solaris.cpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/os/solaris/vm/os_solaris.cpp	Thu Jul 23 22:31:10 2015 -0400
@@ -1971,6 +1971,26 @@
   st->cr();
 }
 
+void os::get_summary_os_info(char* buf, size_t buflen) {
+  strncpy(buf, "Solaris", buflen);  // default to plain solaris
+  FILE* fp = fopen("/etc/release", "r");
+  if (fp != NULL) {
+    char tmp[256];
+    // Only get the first line and chop out everything but the os name.
+    if (fgets(tmp, sizeof(tmp), fp)) {
+      char* ptr = tmp;
+      // skip past whitespace characters
+      while (*ptr != '\0' && (*ptr == ' ' || *ptr == '\t' || *ptr == '\n')) ptr++;
+      if (*ptr != '\0') {
+        char* nl = strchr(ptr, '\n');
+        if (nl != NULL) *nl = '\0';
+        strncpy(buf, ptr, buflen);
+      }
+    }
+    fclose(fp);
+  }
+}
+
 void os::Solaris::print_libversion_info(outputStream* st) {
   st->print("  (T2 libthread)");
   st->cr();
@@ -1998,6 +2018,22 @@
   return status;
 }
 
+void os::get_summary_cpu_info(char* buf, size_t buflen) {
+  // Get MHz with system call. We don't seem to already have this.
+  processor_info_t stats;
+  processorid_t id = getcpuid();
+  int clock = 0;
+  if (processor_info(id, &stats) != -1) {
+    clock = stats.pi_clock;  // pi_processor_type isn't more informative than below
+  }
+#ifdef AMD64
+  snprintf(buf, buflen, "x86 64 bit %d MHz", clock);
+#else
+  // must be sparc
+  snprintf(buf, buflen, "Sparcv9 64 bit %d MHz", clock);
+#endif
+}
+
 void os::pd_print_cpu_info(outputStream* st, char* buf, size_t buflen) {
   // Nothing to do for now.
 }
--- a/src/os/windows/vm/os_windows.cpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/os/windows/vm/os_windows.cpp	Thu Jul 23 22:31:10 2015 -0400
@@ -1593,6 +1593,21 @@
   return result;
 }
 
+#ifndef PRODUCT
+bool os::get_host_name(char* buf, size_t buflen) {
+  DWORD size = (DWORD)buflen;
+  return (GetComputerNameEx(ComputerNameDnsHostname, buf, &size) == TRUE);
+}
+#endif // PRODUCT
+
+void os::get_summary_os_info(char* buf, size_t buflen) {
+  stringStream sst(buf, buflen);
+  os::win32::print_windows_version(&sst);
+  // chop off newline character
+  char* nl = strchr(buf, '\n');
+  if (nl != NULL) *nl = '\0';
+}
+
 void os::print_os_info_brief(outputStream* st) {
   os::print_os_info(st);
 }
@@ -1600,15 +1615,14 @@
 void os::print_os_info(outputStream* st) {
 #ifdef ASSERT
   char buffer[1024];
-  DWORD size = sizeof(buffer);
-  st->print(" HostName: ");
-  if (GetComputerNameEx(ComputerNameDnsHostname, buffer, &size)) {
-    st->print("%s", buffer);
+  st->print("HostName: ");
+  if (get_host_name(buffer, sizeof(buffer))) {
+    st->print("%s ", buffer);
   } else {
-    st->print("N/A");
+    st->print("N/A ");
   }
 #endif
-  st->print(" OS:");
+  st->print("OS:");
   os::win32::print_windows_version(st);
 }
 
@@ -1738,6 +1752,23 @@
   // Nothing to do for now.
 }
 
+void os::get_summary_cpu_info(char* buf, size_t buflen) {
+  HKEY key;
+  DWORD status = RegOpenKey(HKEY_LOCAL_MACHINE,
+               "HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0", &key);
+  if (status == ERROR_SUCCESS) {
+    DWORD size = (DWORD)buflen;
+    status = RegQueryValueEx(key, "ProcessorNameString", NULL, NULL, (byte*)buf, &size);
+    if (status != ERROR_SUCCESS) {
+        strncpy(buf, "## __CPU__", buflen);
+    }
+    RegCloseKey(key);
+  } else {
+    // Put generic cpu info to return
+    strncpy(buf, "## __CPU__", buflen);
+  }
+}
+
 void os::print_memory_info(outputStream* st) {
   st->print("Memory:");
   st->print(" %dk page", os::vm_page_size()>>10);
--- a/src/share/vm/classfile/javaClasses.cpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/classfile/javaClasses.cpp	Thu Jul 23 22:31:10 2015 -0400
@@ -809,6 +809,22 @@
   return name;
 }
 
+// Returns the Java name for this Java mirror (Resource allocated)
+// See Klass::external_name().
+// For primitive type Java mirrors, its type name is returned.
+const char* java_lang_Class::as_external_name(oop java_class) {
+  assert(java_lang_Class::is_instance(java_class), "must be a Class object");
+  const char* name = NULL;
+  if (is_primitive(java_class)) {
+    name = type2name(primitive_type(java_class));
+  } else {
+    name = as_Klass(java_class)->external_name();
+  }
+  if (name == NULL) {
+    name = "<null>";
+  }
+  return name;
+}
 
 Klass* java_lang_Class::array_klass(oop java_class) {
   Klass* k = ((Klass*)java_class->metadata_field(_array_klass_offset));
--- a/src/share/vm/classfile/javaClasses.hpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/classfile/javaClasses.hpp	Thu Jul 23 22:31:10 2015 -0400
@@ -276,6 +276,7 @@
   }
   static Symbol* as_signature(oop java_class, bool intern_if_not_found, TRAPS);
   static void print_signature(oop java_class, outputStream *st);
+  static const char* as_external_name(oop java_class);
   // Testing
   static bool is_instance(oop obj);
 
--- a/src/share/vm/classfile/verificationType.cpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/classfile/verificationType.cpp	Thu Jul 23 22:31:10 2015 -0400
@@ -86,7 +86,7 @@
     VerificationType comp_this = get_component(context, CHECK_false);
     VerificationType comp_from = from.get_component(context, CHECK_false);
     if (!comp_this.is_bogus() && !comp_from.is_bogus()) {
-      return comp_this.is_assignable_from(comp_from, context,
+      return comp_this.is_component_assignable_from(comp_from, context,
                                           from_field_is_protected, CHECK_false);
     }
   }
--- a/src/share/vm/classfile/verificationType.hpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/classfile/verificationType.hpp	Thu Jul 23 22:31:10 2015 -0400
@@ -297,6 +297,26 @@
     }
   }
 
+  // Check to see if one array component type is assignable to another.
+  // Same as is_assignable_from() except int primitives must be identical.
+  bool is_component_assignable_from(
+      const VerificationType& from, ClassVerifier* context,
+      bool from_field_is_protected, TRAPS) const {
+    if (equals(from) || is_bogus()) {
+      return true;
+    } else {
+      switch(_u._data) {
+        case Boolean:
+        case Byte:
+        case Char:
+        case Short:
+          return false;
+        default:
+          return is_assignable_from(from, context, from_field_is_protected, CHECK_false);
+      }
+    }
+  }
+
   VerificationType get_component(ClassVerifier* context, TRAPS) const;
 
   int dimensions() const {
--- a/src/share/vm/compiler/compileBroker.cpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/compiler/compileBroker.cpp	Thu Jul 23 22:31:10 2015 -0400
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2015, 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
@@ -345,6 +345,14 @@
   }
 }
 
+// RedefineClasses support
+void CompileTask::metadata_do(void f(Metadata*)) {
+  f(method());
+  if (hot_method() != NULL && hot_method() != method()) {
+    f(hot_method());
+  }
+}
+
 // ------------------------------------------------------------------
 // CompileTask::print_line_on_error
 //
@@ -660,6 +668,11 @@
  * Get the next CompileTask from a CompileQueue
  */
 CompileTask* CompileQueue::get() {
+  // save methods from RedefineClasses across safepoint
+  // across MethodCompileQueue_lock below.
+  methodHandle save_method;
+  methodHandle save_hot_method;
+
   MutexLocker locker(MethodCompileQueue_lock);
   // If _first is NULL we have no more compile jobs. There are two reasons for
   // having no compile jobs: First, we compiled everything we wanted. Second,
@@ -693,6 +706,12 @@
     No_Safepoint_Verifier nsv;
     task = CompilationPolicy::policy()->select_task(this);
   }
+
+  // Save method pointers across unlock safepoint.  The task is removed from
+  // the compilation queue, which is walked during RedefineClasses.
+  save_method = methodHandle(task->method());
+  save_hot_method = methodHandle(task->hot_method());
+
   remove(task);
   purge_stale_tasks(); // may temporarily release MCQ lock
   return task;
--- a/src/share/vm/compiler/compileBroker.hpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/compiler/compileBroker.hpp	Thu Jul 23 22:31:10 2015 -0400
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2015, 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
@@ -80,6 +80,7 @@
 
   int          compile_id() const                { return _compile_id; }
   Method*      method() const                    { return _method; }
+  Method*      hot_method() const                { return _hot_method; }
   int          osr_bci() const                   { return _osr_bci; }
   bool         is_complete() const               { return _is_complete; }
   bool         is_blocking() const               { return _is_blocking; }
@@ -108,6 +109,9 @@
   bool         is_free() const                   { return _is_free; }
   void         set_is_free(bool val)             { _is_free = val; }
 
+  // RedefineClasses support
+  void         metadata_do(void f(Metadata*));
+
 private:
   static void  print_compilation_impl(outputStream* st, Method* method, int compile_id, int comp_level,
                                       bool is_osr_method = false, int osr_bci = -1, bool is_blocking = false,
--- a/src/share/vm/gc/cms/parCardTableModRefBS.cpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/gc/cms/parCardTableModRefBS.cpp	Thu Jul 23 22:31:10 2015 -0400
@@ -36,10 +36,11 @@
 #include "runtime/orderAccess.inline.hpp"
 #include "runtime/vmThread.hpp"
 
-void CardTableModRefBS::non_clean_card_iterate_parallel_work(Space* sp, MemRegion mr,
-                                                             OopsInGenClosure* cl,
-                                                             CardTableRS* ct,
-                                                             uint n_threads) {
+void CardTableModRefBSForCTRS::
+non_clean_card_iterate_parallel_work(Space* sp, MemRegion mr,
+                                     OopsInGenClosure* cl,
+                                     CardTableRS* ct,
+                                     uint n_threads) {
   assert(n_threads > 0, "expected n_threads > 0");
   assert(n_threads <= ParallelGCThreads,
          err_msg("n_threads: %u > ParallelGCThreads: %u", n_threads, ParallelGCThreads));
@@ -81,7 +82,7 @@
 }
 
 void
-CardTableModRefBS::
+CardTableModRefBSForCTRS::
 process_stride(Space* sp,
                MemRegion used,
                jint stride, int n_strides,
@@ -170,7 +171,7 @@
 #endif
 
 void
-CardTableModRefBS::
+CardTableModRefBSForCTRS::
 process_chunk_boundaries(Space* sp,
                          DirtyCardToOopClosure* dcto_cl,
                          MemRegion chunk_mr,
@@ -426,7 +427,7 @@
 #undef NOISY
 
 void
-CardTableModRefBS::
+CardTableModRefBSForCTRS::
 get_LNC_array_for_space(Space* sp,
                         jbyte**& lowest_non_clean,
                         uintptr_t& lowest_non_clean_base_chunk_index,
--- a/src/share/vm/gc/g1/g1Allocator.hpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/gc/g1/g1Allocator.hpp	Thu Jul 23 22:31:10 2015 -0400
@@ -39,13 +39,8 @@
 protected:
   G1CollectedHeap* _g1h;
 
-  // Outside of GC pauses, the number of bytes used in all regions other
-  // than the current allocation region.
-  size_t _summary_bytes_used;
-
 public:
-  G1Allocator(G1CollectedHeap* heap) :
-    _g1h(heap), _summary_bytes_used(0) { }
+  G1Allocator(G1CollectedHeap* heap) : _g1h(heap) { }
 
   static G1Allocator* create_allocator(G1CollectedHeap* g1h);
 
@@ -59,32 +54,13 @@
   virtual MutatorAllocRegion*    mutator_alloc_region(AllocationContext_t context) = 0;
   virtual SurvivorGCAllocRegion* survivor_gc_alloc_region(AllocationContext_t context) = 0;
   virtual OldGCAllocRegion*      old_gc_alloc_region(AllocationContext_t context) = 0;
-  virtual size_t                 used() = 0;
+  virtual size_t                 used_in_alloc_regions() = 0;
   virtual bool                   is_retained_old_region(HeapRegion* hr) = 0;
 
   void                           reuse_retained_old_region(EvacuationInfo& evacuation_info,
                                                            OldGCAllocRegion* old,
                                                            HeapRegion** retained);
 
-  size_t used_unlocked() const {
-    return _summary_bytes_used;
-  }
-
-  void increase_used(size_t bytes) {
-    _summary_bytes_used += bytes;
-  }
-
-  void decrease_used(size_t bytes) {
-    assert(_summary_bytes_used >= bytes,
-           err_msg("invariant: _summary_bytes_used: " SIZE_FORMAT " should be >= bytes: " SIZE_FORMAT,
-               _summary_bytes_used, bytes));
-    _summary_bytes_used -= bytes;
-  }
-
-  void set_used(size_t bytes) {
-    _summary_bytes_used = bytes;
-  }
-
   virtual HeapRegion* new_heap_region(uint hrs_index,
                                       G1BlockOffsetSharedArray* sharedOffsetArray,
                                       MemRegion mr) {
@@ -133,10 +109,10 @@
     return &_old_gc_alloc_region;
   }
 
-  virtual size_t used() {
+  virtual size_t used_in_alloc_regions() {
     assert(Heap_lock->owner() != NULL,
            "Should be owned on this thread's behalf.");
-    size_t result = _summary_bytes_used;
+    size_t result = 0;
 
     // Read only once in case it is set to NULL concurrently
     HeapRegion* hr = mutator_alloc_region(AllocationContext::current())->get();
--- a/src/share/vm/gc/g1/g1CollectedHeap.cpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/gc/g1/g1CollectedHeap.cpp	Thu Jul 23 22:31:10 2015 -0400
@@ -632,7 +632,7 @@
   check_bitmaps("Humongous Region Allocation", first_hr);
 
   assert(first_hr->used() == word_size * HeapWordSize, "invariant");
-  _allocator->increase_used(first_hr->used());
+  increase_used(first_hr->used());
   _humongous_set.add(first_hr);
 
   return new_obj;
@@ -998,7 +998,7 @@
     if ((prev_last_region != NULL) && (start_region == prev_last_region)) {
       start_address = start_region->end();
       if (start_address > last_address) {
-        _allocator->increase_used(word_size * HeapWordSize);
+        increase_used(word_size * HeapWordSize);
         start_region->set_top(last_address + 1);
         continue;
       }
@@ -1012,7 +1012,7 @@
     if (!_hrm.allocate_containing_regions(curr_range, &commits)) {
       return false;
     }
-    _allocator->increase_used(word_size * HeapWordSize);
+    increase_used(word_size * HeapWordSize);
     if (commits != 0) {
       ergo_verbose1(ErgoHeapSizing,
                     "attempt heap expansion",
@@ -1104,7 +1104,7 @@
     if (start_address != bottom_address) {
       size_t fill_size = pointer_delta(start_address, bottom_address);
       G1CollectedHeap::fill_with_objects(bottom_address, fill_size);
-      _allocator->increase_used(fill_size * HeapWordSize);
+      increase_used(fill_size * HeapWordSize);
     }
   }
 }
@@ -1917,7 +1917,6 @@
   _ref_processor_cm(NULL),
   _ref_processor_stw(NULL),
   _bot_shared(NULL),
-  _evac_failure_scan_stack(NULL),
   _cg1r(NULL),
   _g1mm(NULL),
   _refine_cte_cl(NULL),
@@ -1930,6 +1929,7 @@
   _free_regions_coming(false),
   _young_list(new YoungList(this)),
   _gc_time_stamp(0),
+  _summary_bytes_used(0),
   _survivor_plab_stats(YoungPLABSize, PLABWeight),
   _old_plab_stats(OldPLABSize, PLABWeight),
   _expand_heap_after_alloc_failure(true),
@@ -2204,6 +2204,11 @@
 
   G1StringDedup::initialize();
 
+  _preserved_objs = NEW_C_HEAP_ARRAY(OopAndMarkOopStack, ParallelGCThreads, mtGC);
+  for (uint i = 0; i < ParallelGCThreads; i++) {
+    new (&_preserved_objs[i]) OopAndMarkOopStack();
+  }
+
   return JNI_OK;
 }
 
@@ -2371,7 +2376,7 @@
 
 // Computes the sum of the storage used by the various regions.
 size_t G1CollectedHeap::used() const {
-  size_t result = _allocator->used();
+  size_t result = _summary_bytes_used + _allocator->used_in_alloc_regions();
   if (_archive_allocator != NULL) {
     result += _archive_allocator->used();
   }
@@ -2379,7 +2384,7 @@
 }
 
 size_t G1CollectedHeap::used_unlocked() const {
-  return _allocator->used_unlocked();
+  return _summary_bytes_used;
 }
 
 class SumUsedClosure: public HeapRegionClosure {
@@ -4102,7 +4107,7 @@
         _young_list->reset_auxilary_lists();
 
         if (evacuation_failed()) {
-          _allocator->set_used(recalculate_used());
+          set_used(recalculate_used());
           if (_archive_allocator != NULL) {
             _archive_allocator->clear_used();
           }
@@ -4114,7 +4119,7 @@
         } else {
           // The "used" of the the collection set have already been subtracted
           // when they were freed.  Add in the bytes evacuated.
-          _allocator->increase_used(g1_policy()->bytes_copied_during_gc());
+          increase_used(g1_policy()->bytes_copied_during_gc());
         }
 
         if (collector_state()->during_initial_mark_pause()) {
@@ -4255,21 +4260,6 @@
   return true;
 }
 
-void G1CollectedHeap::init_for_evac_failure(OopsInHeapRegionClosure* cl) {
-  _drain_in_progress = false;
-  set_evac_failure_closure(cl);
-  _evac_failure_scan_stack = new (ResourceObj::C_HEAP, mtGC) GrowableArray<oop>(40, true);
-}
-
-void G1CollectedHeap::finalize_for_evac_failure() {
-  assert(_evac_failure_scan_stack != NULL &&
-         _evac_failure_scan_stack->length() == 0,
-         "Postcondition");
-  assert(!_drain_in_progress, "Postcondition");
-  delete _evac_failure_scan_stack;
-  _evac_failure_scan_stack = NULL;
-}
-
 void G1CollectedHeap::remove_self_forwarding_pointers() {
   double remove_self_forwards_start = os::elapsedTime();
 
@@ -4277,104 +4267,30 @@
   workers()->run_task(&rsfp_task);
 
   // Now restore saved marks, if any.
-  assert(_objs_with_preserved_marks.size() ==
-            _preserved_marks_of_objs.size(), "Both or none.");
-  while (!_objs_with_preserved_marks.is_empty()) {
-    oop obj = _objs_with_preserved_marks.pop();
-    markOop m = _preserved_marks_of_objs.pop();
-    obj->set_mark(m);
-  }
-  _objs_with_preserved_marks.clear(true);
-  _preserved_marks_of_objs.clear(true);
+  for (uint i = 0; i < ParallelGCThreads; i++) {
+    OopAndMarkOopStack& cur = _preserved_objs[i];
+    while (!cur.is_empty()) {
+      OopAndMarkOop elem = cur.pop();
+      elem.set_mark();
+    }
+    cur.clear(true);
+  }
 
   g1_policy()->phase_times()->record_evac_fail_remove_self_forwards((os::elapsedTime() - remove_self_forwards_start) * 1000.0);
 }
 
-void G1CollectedHeap::push_on_evac_failure_scan_stack(oop obj) {
-  _evac_failure_scan_stack->push(obj);
-}
-
-void G1CollectedHeap::drain_evac_failure_scan_stack() {
-  assert(_evac_failure_scan_stack != NULL, "precondition");
-
-  while (_evac_failure_scan_stack->length() > 0) {
-     oop obj = _evac_failure_scan_stack->pop();
-     _evac_failure_closure->set_region(heap_region_containing(obj));
-     obj->oop_iterate_backwards(_evac_failure_closure);
-  }
-}
-
-oop
-G1CollectedHeap::handle_evacuation_failure_par(G1ParScanThreadState* _par_scan_state,
-                                               oop old) {
-  assert(obj_in_cs(old),
-         err_msg("obj: " PTR_FORMAT " should still be in the CSet",
-                 p2i(old)));
-  markOop m = old->mark();
-  oop forward_ptr = old->forward_to_atomic(old);
-  if (forward_ptr == NULL) {
-    // Forward-to-self succeeded.
-    assert(_par_scan_state != NULL, "par scan state");
-    OopsInHeapRegionClosure* cl = _par_scan_state->evac_failure_closure();
-    uint queue_num = _par_scan_state->queue_num();
-
+void G1CollectedHeap::preserve_mark_during_evac_failure(uint queue_num, oop obj, markOop m) {
+  if (!_evacuation_failed) {
     _evacuation_failed = true;
-    _evacuation_failed_info_array[queue_num].register_copy_failure(old->size());
-    if (_evac_failure_closure != cl) {
-      MutexLockerEx x(EvacFailureStack_lock, Mutex::_no_safepoint_check_flag);
-      assert(!_drain_in_progress,
-             "Should only be true while someone holds the lock.");
-      // Set the global evac-failure closure to the current thread's.
-      assert(_evac_failure_closure == NULL, "Or locking has failed.");
-      set_evac_failure_closure(cl);
-      // Now do the common part.
-      handle_evacuation_failure_common(old, m);
-      // Reset to NULL.
-      set_evac_failure_closure(NULL);
-    } else {
-      // The lock is already held, and this is recursive.
-      assert(_drain_in_progress, "This should only be the recursive case.");
-      handle_evacuation_failure_common(old, m);
-    }
-    return old;
-  } else {
-    // Forward-to-self failed. Either someone else managed to allocate
-    // space for this object (old != forward_ptr) or they beat us in
-    // self-forwarding it (old == forward_ptr).
-    assert(old == forward_ptr || !obj_in_cs(forward_ptr),
-           err_msg("obj: " PTR_FORMAT " forwarded to: " PTR_FORMAT " "
-                   "should not be in the CSet",
-                   p2i(old), p2i(forward_ptr)));
-    return forward_ptr;
-  }
-}
-
-void G1CollectedHeap::handle_evacuation_failure_common(oop old, markOop m) {
-  preserve_mark_if_necessary(old, m);
-
-  HeapRegion* r = heap_region_containing(old);
-  if (!r->evacuation_failed()) {
-    r->set_evacuation_failed(true);
-    _hr_printer.evac_failure(r);
-  }
-
-  push_on_evac_failure_scan_stack(old);
-
-  if (!_drain_in_progress) {
-    // prevent recursion in copy_to_survivor_space()
-    _drain_in_progress = true;
-    drain_evac_failure_scan_stack();
-    _drain_in_progress = false;
-  }
-}
-
-void G1CollectedHeap::preserve_mark_if_necessary(oop obj, markOop m) {
-  assert(evacuation_failed(), "Oversaving!");
+  }
+
+  _evacuation_failed_info_array[queue_num].register_copy_failure(obj->size());
+
   // We want to call the "for_promotion_failure" version only in the
   // case of a promotion failure.
   if (m->must_be_preserved_for_promotion_failure(obj)) {
-    _objs_with_preserved_marks.push(obj);
-    _preserved_marks_of_objs.push(m);
+    OopAndMarkOop elem(obj, m);
+    _preserved_objs[queue_num].push(elem);
   }
 }
 
@@ -4450,14 +4366,7 @@
       mark_object(obj);
     }
   }
-
-  if (barrier == G1BarrierEvac) {
-    _par_scan_state->update_rs(_from, p, _worker_id);
-  }
-}
-
-template void G1ParCopyClosure<G1BarrierEvac, G1MarkNone>::do_oop_work(oop* p);
-template void G1ParCopyClosure<G1BarrierEvac, G1MarkNone>::do_oop_work(narrowOop* p);
+}
 
 class G1ParEvacuateFollowersClosure : public VoidClosure {
 protected:
@@ -4597,9 +4506,6 @@
       ReferenceProcessor*             rp = _g1h->ref_processor_stw();
 
       G1ParScanThreadState            pss(_g1h, worker_id, rp);
-      G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, rp);
-
-      pss.set_evac_failure_closure(&evac_failure_cl);
 
       bool only_young = _g1h->collector_state()->gcs_are_young();
 
@@ -5269,9 +5175,6 @@
     G1STWIsAliveClosure is_alive(_g1h);
 
     G1ParScanThreadState            pss(_g1h, worker_id, NULL);
-    G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL);
-
-    pss.set_evac_failure_closure(&evac_failure_cl);
 
     G1ParScanExtRootClosure        only_copy_non_heap_cl(_g1h, &pss, NULL);
 
@@ -5368,10 +5271,6 @@
     HandleMark   hm;
 
     G1ParScanThreadState            pss(_g1h, worker_id, NULL);
-    G1ParScanHeapEvacFailureClosure evac_failure_cl(_g1h, &pss, NULL);
-
-    pss.set_evac_failure_closure(&evac_failure_cl);
-
     assert(pss.queue_is_empty(), "both queue and overflow should be empty");
 
     G1ParScanExtRootClosure        only_copy_non_heap_cl(_g1h, &pss, NULL);
@@ -5476,15 +5375,11 @@
 
   // Use only a single queue for this PSS.
   G1ParScanThreadState            pss(this, 0, NULL);
+  assert(pss.queue_is_empty(), "pre-condition");
 
   // We do not embed a reference processor in the copying/scanning
   // closures while we're actually processing the discovered
   // reference objects.
-  G1ParScanHeapEvacFailureClosure evac_failure_cl(this, &pss, NULL);
-
-  pss.set_evac_failure_closure(&evac_failure_cl);
-
-  assert(pss.queue_is_empty(), "pre-condition");
 
   G1ParScanExtRootClosure        only_copy_non_heap_cl(this, &pss, NULL);
 
@@ -5590,8 +5485,6 @@
 
   const uint n_workers = workers()->active_workers();
 
-  init_for_evac_failure(NULL);
-
   assert(dirty_card_queue_set().completed_buffers_num() == 0, "Should be empty");
   double start_par_time_sec = os::elapsedTime();
   double end_par_time_sec;
@@ -5655,8 +5548,6 @@
 
   purge_code_root_memory();
 
-  finalize_for_evac_failure();
-
   if (evacuation_failed()) {
     remove_self_forwarding_pointers();
 
@@ -5745,7 +5636,7 @@
 }
 
 void G1CollectedHeap::decrement_summary_bytes(size_t bytes) {
-  _allocator->decrease_used(bytes);
+  decrease_used(bytes);
 }
 
 class G1ParCleanupCTTask : public AbstractGangTask {
@@ -6395,6 +6286,21 @@
   _hrm.remove_all_free_regions();
 }
 
+void G1CollectedHeap::increase_used(size_t bytes) {
+  _summary_bytes_used += bytes;
+}
+
+void G1CollectedHeap::decrease_used(size_t bytes) {
+  assert(_summary_bytes_used >= bytes,
+         err_msg("invariant: _summary_bytes_used: " SIZE_FORMAT " should be >= bytes: " SIZE_FORMAT,
+                 _summary_bytes_used, bytes));
+  _summary_bytes_used -= bytes;
+}
+
+void G1CollectedHeap::set_used(size_t bytes) {
+  _summary_bytes_used = bytes;
+}
+
 class RebuildRegionSetsClosure : public HeapRegionClosure {
 private:
   bool            _free_list_only;
@@ -6463,15 +6369,15 @@
   heap_region_iterate(&cl);
 
   if (!free_list_only) {
-    _allocator->set_used(cl.total_used());
+    set_used(cl.total_used());
     if (_archive_allocator != NULL) {
       _archive_allocator->clear_used();
     }
   }
-  assert(_allocator->used_unlocked() == recalculate_used(),
-         err_msg("inconsistent _allocator->used_unlocked(), "
+  assert(used_unlocked() == recalculate_used(),
+         err_msg("inconsistent used_unlocked(), "
                  "value: " SIZE_FORMAT " recalculated: " SIZE_FORMAT,
-                 _allocator->used_unlocked(), recalculate_used()));
+                 used_unlocked(), recalculate_used()));
 }
 
 void G1CollectedHeap::set_refine_cte_cl_concurrency(bool concurrent) {
@@ -6511,7 +6417,7 @@
   assert(alloc_region->is_eden(), "all mutator alloc regions should be eden");
 
   g1_policy()->add_region_to_incremental_cset_lhs(alloc_region);
-  _allocator->increase_used(allocated_bytes);
+  increase_used(allocated_bytes);
   _hr_printer.retire(alloc_region);
   // We update the eden sizes here, when the region is retired,
   // instead of when it's allocated, since this is the point that its
--- a/src/share/vm/gc/g1/g1CollectedHeap.hpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/gc/g1/g1CollectedHeap.hpp	Thu Jul 23 22:31:10 2015 -0400
@@ -251,6 +251,15 @@
   // Class that handles the different kinds of allocations.
   G1Allocator* _allocator;
 
+  // Outside of GC pauses, the number of bytes used in all regions other
+  // than the current allocation region(s).
+  size_t _summary_bytes_used;
+
+  void increase_used(size_t bytes);
+  void decrease_used(size_t bytes);
+
+  void set_used(size_t bytes);
+
   // Class that handles archive allocation ranges.
   G1ArchiveAllocator* _archive_allocator;
 
@@ -858,44 +867,27 @@
   // forwarding pointers to themselves.  Reset them.
   void remove_self_forwarding_pointers();
 
-  // Together, these store an object with a preserved mark, and its mark value.
-  Stack<oop, mtGC>     _objs_with_preserved_marks;
-  Stack<markOop, mtGC> _preserved_marks_of_objs;
+  struct OopAndMarkOop {
+   private:
+    oop _o;
+    markOop _m;
+   public:
+    OopAndMarkOop(oop obj, markOop m) : _o(obj), _m(m) {
+    }
+
+    void set_mark() {
+      _o->set_mark(_m);
+    }
+  };
+
+  typedef Stack<OopAndMarkOop,mtGC> OopAndMarkOopStack;
+  // Stores marks with the corresponding oop that we need to preserve during evacuation
+  // failure.
+  OopAndMarkOopStack*  _preserved_objs;
 
   // Preserve the mark of "obj", if necessary, in preparation for its mark
   // word being overwritten with a self-forwarding-pointer.
-  void preserve_mark_if_necessary(oop obj, markOop m);
-
-  // The stack of evac-failure objects left to be scanned.
-  GrowableArray<oop>*    _evac_failure_scan_stack;
-  // The closure to apply to evac-failure objects.
-
-  OopsInHeapRegionClosure* _evac_failure_closure;
-  // Set the field above.
-  void
-  set_evac_failure_closure(OopsInHeapRegionClosure* evac_failure_closure) {
-    _evac_failure_closure = evac_failure_closure;
-  }
-
-  // Push "obj" on the scan stack.
-  void push_on_evac_failure_scan_stack(oop obj);
-  // Process scan stack entries until the stack is empty.
-  void drain_evac_failure_scan_stack();
-  // True iff an invocation of "drain_scan_stack" is in progress; to
-  // prevent unnecessary recursion.
-  bool _drain_in_progress;
-
-  // Do any necessary initialization for evacuation-failure handling.
-  // "cl" is the closure that will be used to process evac-failure
-  // objects.
-  void init_for_evac_failure(OopsInHeapRegionClosure* cl);
-  // Do any necessary cleanup for evacuation-failure handling data
-  // structures.
-  void finalize_for_evac_failure();
-
-  // An attempt to evacuate "obj" has failed; take necessary steps.
-  oop handle_evacuation_failure_par(G1ParScanThreadState* _par_scan_state, oop obj);
-  void handle_evacuation_failure_common(oop obj, markOop m);
+  void preserve_mark_during_evac_failure(uint queue, oop obj, markOop m);
 
 #ifndef PRODUCT
   // Support for forcing evacuation failures. Analogous to
--- a/src/share/vm/gc/g1/g1OopClosures.hpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/gc/g1/g1OopClosures.hpp	Thu Jul 23 22:31:10 2015 -0400
@@ -111,7 +111,6 @@
 
 enum G1Barrier {
   G1BarrierNone,
-  G1BarrierEvac,
   G1BarrierKlass
 };
 
@@ -148,8 +147,6 @@
 // We use a separate closure to handle references during evacuation
 // failure processing.
 
-typedef G1ParCopyClosure<G1BarrierEvac, G1MarkNone> G1ParScanHeapEvacFailureClosure;
-
 class FilterIntoCSClosure: public ExtendedOopClosure {
   G1CollectedHeap* _g1;
   OopClosure* _oc;
--- a/src/share/vm/gc/g1/g1ParScanThreadState.cpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/gc/g1/g1ParScanThreadState.cpp	Thu Jul 23 22:31:10 2015 -0400
@@ -144,8 +144,6 @@
 #endif // ASSERT
 
 void G1ParScanThreadState::trim_queue() {
-  assert(_evac_failure_cl != NULL, "not set");
-
   StarTask ref;
   do {
     // Drain the overflow stack first, so other threads can steal.
@@ -222,7 +220,7 @@
       if (obj_ptr == NULL) {
         // This will either forward-to-self, or detect that someone else has
         // installed a forwarding pointer.
-        return _g1h->handle_evacuation_failure_par(this, old);
+        return handle_evacuation_failure_par(old, old_mark);
       }
     }
   }
@@ -236,7 +234,7 @@
     // Doing this after all the allocation attempts also tests the
     // undo_allocation() method too.
     _g1_par_allocator->undo_allocation(dest_state, obj_ptr, word_sz, context);
-    return _g1h->handle_evacuation_failure_par(this, old);
+    return handle_evacuation_failure_par(old, old_mark);
   }
 #endif // !PRODUCT
 
@@ -301,3 +299,36 @@
     return forward_ptr;
   }
 }
+
+oop G1ParScanThreadState::handle_evacuation_failure_par(oop old, markOop m) {
+  assert(_g1h->obj_in_cs(old),
+         err_msg("Object " PTR_FORMAT " should be in the CSet", p2i(old)));
+
+  oop forward_ptr = old->forward_to_atomic(old);
+  if (forward_ptr == NULL) {
+    // Forward-to-self succeeded. We are the "owner" of the object.
+    HeapRegion* r = _g1h->heap_region_containing(old);
+
+    if (!r->evacuation_failed()) {
+      r->set_evacuation_failed(true);
+     _g1h->hr_printer()->evac_failure(r);
+    }
+
+    _g1h->preserve_mark_during_evac_failure(_queue_num, old, m);
+
+    _scanner.set_region(r);
+    old->oop_iterate_backwards(&_scanner);
+
+    return old;
+  } else {
+    // Forward-to-self failed. Either someone else managed to allocate
+    // space for this object (old != forward_ptr) or they beat us in
+    // self-forwarding it (old == forward_ptr).
+    assert(old == forward_ptr || !_g1h->obj_in_cs(forward_ptr),
+           err_msg("Object " PTR_FORMAT " forwarded to: " PTR_FORMAT " "
+                   "should not be in the CSet",
+                   p2i(old), p2i(forward_ptr)));
+    return forward_ptr;
+  }
+}
+
--- a/src/share/vm/gc/g1/g1ParScanThreadState.hpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/gc/g1/g1ParScanThreadState.hpp	Thu Jul 23 22:31:10 2015 -0400
@@ -54,8 +54,6 @@
   uint              _tenuring_threshold;
   G1ParScanClosure  _scanner;
 
-  OopsInHeapRegionClosure*      _evac_failure_cl;
-
   int  _hash_seed;
   uint _queue_num;
 
@@ -114,12 +112,6 @@
     }
   }
 
-  void set_evac_failure_closure(OopsInHeapRegionClosure* evac_failure_cl) {
-    _evac_failure_cl = evac_failure_cl;
-  }
-
-  OopsInHeapRegionClosure* evac_failure_closure() { return _evac_failure_cl; }
-
   int* hash_seed() { return &_hash_seed; }
   uint queue_num() { return _queue_num; }
 
@@ -211,6 +203,9 @@
   void trim_queue();
 
   inline void steal_and_trim_queue(RefToScanQueueSet *task_queues);
+
+  // An attempt to evacuate "obj" has failed; take necessary steps.
+  oop handle_evacuation_failure_par(oop obj, markOop m);
 };
 
 #endif // SHARE_VM_GC_G1_G1PARSCANTHREADSTATE_HPP
--- a/src/share/vm/gc/g1/vmStructs_g1.hpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/gc/g1/vmStructs_g1.hpp	Thu Jul 23 22:31:10 2015 -0400
@@ -45,13 +45,11 @@
   nonstatic_field(HeapRegionManager, _regions,          G1HeapRegionTable)    \
   nonstatic_field(HeapRegionManager, _num_committed,    uint)                 \
                                                                               \
-  nonstatic_field(G1Allocator,     _summary_bytes_used, size_t)               \
-                                                                              \
+  nonstatic_field(G1CollectedHeap, _summary_bytes_used, size_t)               \
   nonstatic_field(G1CollectedHeap, _hrm,                HeapRegionManager)    \
   nonstatic_field(G1CollectedHeap, _g1mm,               G1MonitoringSupport*) \
   nonstatic_field(G1CollectedHeap, _old_set,            HeapRegionSetBase)    \
   nonstatic_field(G1CollectedHeap, _humongous_set,      HeapRegionSetBase)    \
-  nonstatic_field(G1CollectedHeap, _allocator,          G1Allocator*)         \
                                                                               \
   nonstatic_field(G1MonitoringSupport, _eden_committed,     size_t)           \
   nonstatic_field(G1MonitoringSupport, _eden_used,          size_t)           \
@@ -78,12 +76,10 @@
   declare_toplevel_type(HeapRegionSetBase)                                    \
   declare_toplevel_type(HeapRegionSetCount)                                   \
   declare_toplevel_type(G1MonitoringSupport)                                  \
-  declare_toplevel_type(G1Allocator)                                          \
                                                                               \
   declare_toplevel_type(G1CollectedHeap*)                                     \
   declare_toplevel_type(HeapRegion*)                                          \
   declare_toplevel_type(G1MonitoringSupport*)                                 \
-  declare_toplevel_type(G1Allocator*)                                         \
 
 
 #endif // SHARE_VM_GC_G1_VMSTRUCTS_G1_HPP
--- a/src/share/vm/gc/parallel/cardTableExtension.cpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/gc/parallel/cardTableExtension.cpp	Thu Jul 23 22:31:10 2015 -0400
@@ -40,7 +40,6 @@
   PSYoungGen*         _young_gen;
   CardTableExtension* _card_table;
   HeapWord*           _unmarked_addr;
-  jbyte*              _unmarked_card;
 
  protected:
   template <class T> void do_oop_work(T* p) {
@@ -50,7 +49,6 @@
       // Don't overwrite the first missing card mark
       if (_unmarked_addr == NULL) {
         _unmarked_addr = (HeapWord*)p;
-        _unmarked_card = _card_table->byte_for(p);
       }
     }
   }
--- a/src/share/vm/gc/serial/defNewGeneration.cpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/gc/serial/defNewGeneration.cpp	Thu Jul 23 22:31:10 2015 -0400
@@ -623,7 +623,7 @@
   {
     // DefNew needs to run with n_threads == 0, to make sure the serial
     // version of the card table scanning code is used.
-    // See: CardTableModRefBS::non_clean_card_iterate_possibly_parallel.
+    // See: CardTableModRefBSForCTRS::non_clean_card_iterate_possibly_parallel.
     StrongRootsScope srs(0);
 
     gch->gen_process_roots(&srs,
--- a/src/share/vm/gc/shared/cardTableModRefBS.cpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/gc/shared/cardTableModRefBS.cpp	Thu Jul 23 22:31:10 2015 -0400
@@ -24,22 +24,12 @@
 
 #include "precompiled.hpp"
 #include "gc/shared/cardTableModRefBS.inline.hpp"
-#include "gc/shared/cardTableRS.hpp"
 #include "gc/shared/collectedHeap.hpp"
 #include "gc/shared/genCollectedHeap.hpp"
-#include "gc/shared/space.hpp"
 #include "gc/shared/space.inline.hpp"
-#include "memory/allocation.inline.hpp"
-#include "memory/universe.hpp"
 #include "memory/virtualspace.hpp"
-#include "runtime/java.hpp"
-#include "runtime/mutexLocker.hpp"
 #include "services/memTracker.hpp"
 #include "utilities/macros.hpp"
-#ifdef COMPILER1
-#include "c1/c1_LIR.hpp"
-#include "c1/c1_LIRGenerator.hpp"
-#endif
 
 // This kind of "BarrierSet" allows a "CollectedHeap" to detect and
 // enumerate ref fields that have been modified (since the last
@@ -68,12 +58,7 @@
   _committed(NULL),
   _cur_covered_regions(0),
   _byte_map(NULL),
-  byte_map_base(NULL),
-  // LNC functionality
-  _lowest_non_clean(NULL),
-  _lowest_non_clean_chunk_size(NULL),
-  _lowest_non_clean_base_chunk_index(NULL),
-  _last_LNC_resizing_collection(NULL)
+  byte_map_base(NULL)
 {
   assert((uintptr_t(_whole_heap.start())  & (card_size - 1))  == 0, "heap must start at card boundary");
   assert((uintptr_t(_whole_heap.end()) & (card_size - 1))  == 0, "heap must end at card boundary");
@@ -130,25 +115,6 @@
                             !ExecMem, "card table last card");
   *guard_card = last_card;
 
-  _lowest_non_clean =
-    NEW_C_HEAP_ARRAY(CardArr, _max_covered_regions, mtGC);
-  _lowest_non_clean_chunk_size =
-    NEW_C_HEAP_ARRAY(size_t, _max_covered_regions, mtGC);
-  _lowest_non_clean_base_chunk_index =
-    NEW_C_HEAP_ARRAY(uintptr_t, _max_covered_regions, mtGC);
-  _last_LNC_resizing_collection =
-    NEW_C_HEAP_ARRAY(int, _max_covered_regions, mtGC);
-  if (_lowest_non_clean == NULL
-      || _lowest_non_clean_chunk_size == NULL
-      || _lowest_non_clean_base_chunk_index == NULL
-      || _last_LNC_resizing_collection == NULL)
-    vm_exit_during_initialization("couldn't allocate an LNC array.");
-  for (int i = 0; i < _max_covered_regions; i++) {
-    _lowest_non_clean[i] = NULL;
-    _lowest_non_clean_chunk_size[i] = 0;
-    _last_LNC_resizing_collection[i] = -1;
-  }
-
   if (TraceCardTableModRefBS) {
     gclog_or_tty->print_cr("CardTableModRefBS::CardTableModRefBS: ");
     gclog_or_tty->print_cr("  "
@@ -171,22 +137,6 @@
     delete[] _committed;
     _committed = NULL;
   }
-  if (_lowest_non_clean) {
-    FREE_C_HEAP_ARRAY(CardArr, _lowest_non_clean);
-    _lowest_non_clean = NULL;
-  }
-  if (_lowest_non_clean_chunk_size) {
-    FREE_C_HEAP_ARRAY(size_t, _lowest_non_clean_chunk_size);
-    _lowest_non_clean_chunk_size = NULL;
-  }
-  if (_lowest_non_clean_base_chunk_index) {
-    FREE_C_HEAP_ARRAY(uintptr_t, _lowest_non_clean_base_chunk_index);
-    _lowest_non_clean_base_chunk_index = NULL;
-  }
-  if (_last_LNC_resizing_collection) {
-    FREE_C_HEAP_ARRAY(int, _last_LNC_resizing_collection);
-    _last_LNC_resizing_collection = NULL;
-  }
 }
 
 int CardTableModRefBS::find_covering_region_by_base(HeapWord* base) {
@@ -437,32 +387,6 @@
 }
 
 
-void CardTableModRefBS::non_clean_card_iterate_possibly_parallel(Space* sp,
-                                                                 MemRegion mr,
-                                                                 OopsInGenClosure* cl,
-                                                                 CardTableRS* ct,
-                                                                 uint n_threads) {
-  if (!mr.is_empty()) {
-    if (n_threads > 0) {
-#if INCLUDE_ALL_GCS
-      non_clean_card_iterate_parallel_work(sp, mr, cl, ct, n_threads);
-#else  // INCLUDE_ALL_GCS
-      fatal("Parallel gc not supported here.");
-#endif // INCLUDE_ALL_GCS
-    } else {
-      // clear_cl finds contiguous dirty ranges of cards to process and clear.
-
-      // This is the single-threaded version used by DefNew.
-      const bool parallel = false;
-
-      DirtyCardToOopClosure* dcto_cl = sp->new_dcto_cl(cl, precision(), cl->gen_boundary(), parallel);
-      ClearNoncleanCardWrapper clear_cl(dcto_cl, ct, parallel);
-
-      clear_cl.do_MemRegion(mr);
-    }
-  }
-}
-
 void CardTableModRefBS::dirty_MemRegion(MemRegion mr) {
   assert((HeapWord*)align_size_down((uintptr_t)mr.start(), HeapWordSize) == mr.start(), "Unaligned start");
   assert((HeapWord*)align_size_up  ((uintptr_t)mr.end(),   HeapWordSize) == mr.end(),   "Unaligned end"  );
@@ -623,15 +547,3 @@
                p2i(_byte_map), p2i(_byte_map + _byte_map_size), p2i(byte_map_base));
 }
 
-bool CardTableModRefBSForCTRS::card_will_be_scanned(jbyte cv) {
-  return
-    CardTableModRefBS::card_will_be_scanned(cv) ||
-    _rs->is_prev_nonclean_card_val(cv);
-};
-
-bool CardTableModRefBSForCTRS::card_may_have_been_dirty(jbyte cv) {
-  return
-    cv != clean_card &&
-    (CardTableModRefBS::card_may_have_been_dirty(cv) ||
-     CardTableRS::youngergen_may_have_been_dirty(cv));
-};
--- a/src/share/vm/gc/shared/cardTableModRefBS.hpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/gc/shared/cardTableModRefBS.hpp	Thu Jul 23 22:31:10 2015 -0400
@@ -40,23 +40,9 @@
 // Closures used to scan dirty cards should take these
 // considerations into account.
 
-class Generation;
-class OopsInGenClosure;
-class DirtyCardToOopClosure;
-class ClearNoncleanCardWrapper;
-class CardTableRS;
-
 class CardTableModRefBS: public ModRefBarrierSet {
   // Some classes get to look at some private stuff.
-  friend class BytecodeInterpreter;
   friend class VMStructs;
-  friend class CardTableRS;
-  friend class CheckForUnmarkedOops; // Needs access to raw card bytes.
-  friend class SharkBuilder;
-#ifndef PRODUCT
-  // For debugging.
-  friend class GuaranteeNotModClosure;
-#endif
  protected:
 
   enum CardValues {
@@ -75,24 +61,6 @@
   // a word's worth (row) of clean card values
   static const intptr_t clean_card_row = (intptr_t)(-1);
 
-  // dirty and precleaned are equivalent wrt younger_refs_iter.
-  static bool card_is_dirty_wrt_gen_iter(jbyte cv) {
-    return cv == dirty_card || cv == precleaned_card;
-  }
-
-  // Returns "true" iff the value "cv" will cause the card containing it
-  // to be scanned in the current traversal.  May be overridden by
-  // subtypes.
-  virtual bool card_will_be_scanned(jbyte cv) {
-    return CardTableModRefBS::card_is_dirty_wrt_gen_iter(cv);
-  }
-
-  // Returns "true" iff the value "cv" may have represented a dirty card at
-  // some point.
-  virtual bool card_may_have_been_dirty(jbyte cv) {
-    return card_is_dirty_wrt_gen_iter(cv);
-  }
-
   // The declaration order of these const fields is important; see the
   // constructor before changing.
   const MemRegion _whole_heap;       // the region covered by the card table
@@ -174,20 +142,6 @@
     return byte_for(p) + 1;
   }
 
-  // Iterate over the portion of the card-table which covers the given
-  // region mr in the given space and apply cl to any dirty sub-regions
-  // of mr. Clears the dirty cards as they are processed.
-  void non_clean_card_iterate_possibly_parallel(Space* sp, MemRegion mr,
-                                                OopsInGenClosure* cl, CardTableRS* ct,
-                                                uint n_threads);
-
- private:
-  // Work method used to implement non_clean_card_iterate_possibly_parallel()
-  // above in the parallel case.
-  void non_clean_card_iterate_parallel_work(Space* sp, MemRegion mr,
-                                            OopsInGenClosure* cl, CardTableRS* ct,
-                                            uint n_threads);
-
  protected:
   // Dirty the bytes corresponding to "mr" (not all of which must be
   // covered.)
@@ -197,65 +151,6 @@
   // all of which must be covered.)
   void clear_MemRegion(MemRegion mr);
 
-  // *** Support for parallel card scanning.
-
-  // This is an array, one element per covered region of the card table.
-  // Each entry is itself an array, with one element per chunk in the
-  // covered region.  Each entry of these arrays is the lowest non-clean
-  // card of the corresponding chunk containing part of an object from the
-  // previous chunk, or else NULL.
-  typedef jbyte*  CardPtr;
-  typedef CardPtr* CardArr;
-  CardArr* _lowest_non_clean;
-  size_t*  _lowest_non_clean_chunk_size;
-  uintptr_t* _lowest_non_clean_base_chunk_index;
-  int* _last_LNC_resizing_collection;
-
-  // Initializes "lowest_non_clean" to point to the array for the region
-  // covering "sp", and "lowest_non_clean_base_chunk_index" to the chunk
-  // index of the corresponding to the first element of that array.
-  // Ensures that these arrays are of sufficient size, allocating if necessary.
-  // May be called by several threads concurrently.
-  void get_LNC_array_for_space(Space* sp,
-                               jbyte**& lowest_non_clean,
-                               uintptr_t& lowest_non_clean_base_chunk_index,
-                               size_t& lowest_non_clean_chunk_size);
-
-  // Returns the number of chunks necessary to cover "mr".
-  size_t chunks_to_cover(MemRegion mr) {
-    return (size_t)(addr_to_chunk_index(mr.last()) -
-                    addr_to_chunk_index(mr.start()) + 1);
-  }
-
-  // Returns the index of the chunk in a stride which
-  // covers the given address.
-  uintptr_t addr_to_chunk_index(const void* addr) {
-    uintptr_t card = (uintptr_t) byte_for(addr);
-    return card / ParGCCardsPerStrideChunk;
-  }
-
-  // Apply cl, which must either itself apply dcto_cl or be dcto_cl,
-  // to the cards in the stride (of n_strides) within the given space.
-  void process_stride(Space* sp,
-                      MemRegion used,
-                      jint stride, int n_strides,
-                      OopsInGenClosure* cl,
-                      CardTableRS* ct,
-                      jbyte** lowest_non_clean,
-                      uintptr_t lowest_non_clean_base_chunk_index,
-                      size_t lowest_non_clean_chunk_size);
-
-  // Makes sure that chunk boundaries are handled appropriately, by
-  // adjusting the min_done of dcto_cl, and by using a special card-table
-  // value to indicate how min_done should be set.
-  void process_chunk_boundaries(Space* sp,
-                                DirtyCardToOopClosure* dcto_cl,
-                                MemRegion chunk_mr,
-                                MemRegion used,
-                                jbyte** lowest_non_clean,
-                                uintptr_t lowest_non_clean_base_chunk_index,
-                                size_t    lowest_non_clean_chunk_size);
-
 public:
   // Constants
   enum SomePublicConstants {
@@ -436,34 +331,5 @@
   static const BarrierSet::Name value = BarrierSet::CardTableModRef;
 };
 
-class CardTableRS;
-
-// A specialization for the CardTableRS gen rem set.
-class CardTableModRefBSForCTRS: public CardTableModRefBS {
-  CardTableRS* _rs;
-protected:
-  bool card_will_be_scanned(jbyte cv);
-  bool card_may_have_been_dirty(jbyte cv);
-public:
-  CardTableModRefBSForCTRS(MemRegion whole_heap) :
-    CardTableModRefBS(
-      whole_heap,
-      // Concrete tag should be BarrierSet::CardTableForRS.
-      // That will presently break things in a bunch of places though.
-      // The concrete tag is used as a dispatch key in many places, and
-      // CardTableForRS does not correctly dispatch in some of those
-      // uses. This will be addressed as part of a reorganization of the
-      // BarrierSet hierarchy.
-      BarrierSet::FakeRtti(BarrierSet::CardTableModRef, 0).add_tag(BarrierSet::CardTableForRS))
-    {}
-
-  void set_CTRS(CardTableRS* rs) { _rs = rs; }
-};
-
-template<>
-struct BarrierSet::GetName<CardTableModRefBSForCTRS> {
-  static const BarrierSet::Name value = BarrierSet::CardTableForRS;
-};
-
 
 #endif // SHARE_VM_GC_SHARED_CARDTABLEMODREFBS_HPP
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/vm/gc/shared/cardTableModRefBSForCTRS.cpp	Thu Jul 23 22:31:10 2015 -0400
@@ -0,0 +1,129 @@
+/*
+ * Copyright (c) 2015, 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.
+ *
+ */
+
+#include "precompiled.hpp"
+#include "gc/shared/cardTableModRefBS.inline.hpp"
+#include "gc/shared/cardTableRS.hpp"
+#include "memory/allocation.inline.hpp"
+#include "gc/shared/space.inline.hpp"
+
+CardTableModRefBSForCTRS::CardTableModRefBSForCTRS(MemRegion whole_heap) :
+  CardTableModRefBS(
+    whole_heap,
+    // Concrete tag should be BarrierSet::CardTableForRS.
+    // That will presently break things in a bunch of places though.
+    // The concrete tag is used as a dispatch key in many places, and
+    // CardTableForRS does not correctly dispatch in some of those
+    // uses. This will be addressed as part of a reorganization of the
+    // BarrierSet hierarchy.
+    BarrierSet::FakeRtti(BarrierSet::CardTableModRef, 0).add_tag(BarrierSet::CardTableForRS)),
+  // LNC functionality
+  _lowest_non_clean(NULL),
+  _lowest_non_clean_chunk_size(NULL),
+  _lowest_non_clean_base_chunk_index(NULL),
+  _last_LNC_resizing_collection(NULL)
+{ }
+
+void CardTableModRefBSForCTRS::initialize() {
+  CardTableModRefBS::initialize();
+  _lowest_non_clean =
+    NEW_C_HEAP_ARRAY(CardArr, _max_covered_regions, mtGC);
+  _lowest_non_clean_chunk_size =
+    NEW_C_HEAP_ARRAY(size_t, _max_covered_regions, mtGC);
+  _lowest_non_clean_base_chunk_index =
+    NEW_C_HEAP_ARRAY(uintptr_t, _max_covered_regions, mtGC);
+  _last_LNC_resizing_collection =
+    NEW_C_HEAP_ARRAY(int, _max_covered_regions, mtGC);
+  if (_lowest_non_clean == NULL
+      || _lowest_non_clean_chunk_size == NULL
+      || _lowest_non_clean_base_chunk_index == NULL
+      || _last_LNC_resizing_collection == NULL)
+    vm_exit_during_initialization("couldn't allocate an LNC array.");
+  for (int i = 0; i < _max_covered_regions; i++) {
+    _lowest_non_clean[i] = NULL;
+    _lowest_non_clean_chunk_size[i] = 0;
+    _last_LNC_resizing_collection[i] = -1;
+  }
+}
+
+CardTableModRefBSForCTRS::~CardTableModRefBSForCTRS() {
+  if (_lowest_non_clean) {
+    FREE_C_HEAP_ARRAY(CardArr, _lowest_non_clean);
+    _lowest_non_clean = NULL;
+  }
+  if (_lowest_non_clean_chunk_size) {
+    FREE_C_HEAP_ARRAY(size_t, _lowest_non_clean_chunk_size);
+    _lowest_non_clean_chunk_size = NULL;
+  }
+  if (_lowest_non_clean_base_chunk_index) {
+    FREE_C_HEAP_ARRAY(uintptr_t, _lowest_non_clean_base_chunk_index);
+    _lowest_non_clean_base_chunk_index = NULL;
+  }
+  if (_last_LNC_resizing_collection) {
+    FREE_C_HEAP_ARRAY(int, _last_LNC_resizing_collection);
+    _last_LNC_resizing_collection = NULL;
+  }
+}
+
+bool CardTableModRefBSForCTRS::card_will_be_scanned(jbyte cv) {
+  return
+    card_is_dirty_wrt_gen_iter(cv) ||
+    _rs->is_prev_nonclean_card_val(cv);
+}
+
+bool CardTableModRefBSForCTRS::card_may_have_been_dirty(jbyte cv) {
+  return
+    cv != clean_card &&
+    (card_is_dirty_wrt_gen_iter(cv) ||
+     CardTableRS::youngergen_may_have_been_dirty(cv));
+}
+
+void CardTableModRefBSForCTRS::non_clean_card_iterate_possibly_parallel(
+  Space* sp,
+  MemRegion mr,
+  OopsInGenClosure* cl,
+  CardTableRS* ct,
+  uint n_threads)
+{
+  if (!mr.is_empty()) {
+    if (n_threads > 0) {
+#if INCLUDE_ALL_GCS
+      non_clean_card_iterate_parallel_work(sp, mr, cl, ct, n_threads);
+#else  // INCLUDE_ALL_GCS
+      fatal("Parallel gc not supported here.");
+#endif // INCLUDE_ALL_GCS
+    } else {
+      // clear_cl finds contiguous dirty ranges of cards to process and clear.
+
+      // This is the single-threaded version used by DefNew.
+      const bool parallel = false;
+
+      DirtyCardToOopClosure* dcto_cl = sp->new_dcto_cl(cl, precision(), cl->gen_boundary(), parallel);
+      ClearNoncleanCardWrapper clear_cl(dcto_cl, ct, parallel);
+
+      clear_cl.do_MemRegion(mr);
+    }
+  }
+}
+
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/share/vm/gc/shared/cardTableModRefBSForCTRS.hpp	Thu Jul 23 22:31:10 2015 -0400
@@ -0,0 +1,143 @@
+/*
+ * Copyright (c) 2015, 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.
+ *
+ */
+
+#ifndef SHARE_VM_GC_SHARED_CARDTABLEMODREFBSFORCTRS_HPP
+#define SHARE_VM_GC_SHARED_CARDTABLEMODREFBSFORCTRS_HPP
+
+#include "gc/shared/cardTableModRefBS.hpp"
+
+class CardTableRS;
+class DirtyCardToOopClosure;
+class OopsInGenClosure;
+
+// A specialization for the CardTableRS gen rem set.
+class CardTableModRefBSForCTRS: public CardTableModRefBS {
+  friend class CardTableRS;
+
+public:
+  CardTableModRefBSForCTRS(MemRegion whole_heap);
+  ~CardTableModRefBSForCTRS();
+
+  virtual void initialize();
+
+  void set_CTRS(CardTableRS* rs) { _rs = rs; }
+
+private:
+  CardTableRS* _rs;
+
+  // *** Support for parallel card scanning.
+
+  // dirty and precleaned are equivalent wrt younger_refs_iter.
+  static bool card_is_dirty_wrt_gen_iter(jbyte cv) {
+    return cv == dirty_card || cv == precleaned_card;
+  }
+
+  // Returns "true" iff the value "cv" will cause the card containing it
+  // to be scanned in the current traversal.  May be overridden by
+  // subtypes.
+  bool card_will_be_scanned(jbyte cv);
+
+  // Returns "true" iff the value "cv" may have represented a dirty card at
+  // some point.
+  bool card_may_have_been_dirty(jbyte cv);
+
+  // Iterate over the portion of the card-table which covers the given
+  // region mr in the given space and apply cl to any dirty sub-regions
+  // of mr. Clears the dirty cards as they are processed.
+  void non_clean_card_iterate_possibly_parallel(Space* sp, MemRegion mr,
+                                                OopsInGenClosure* cl, CardTableRS* ct,
+                                                uint n_threads);
+
+  // Work method used to implement non_clean_card_iterate_possibly_parallel()
+  // above in the parallel case.
+  void non_clean_card_iterate_parallel_work(Space* sp, MemRegion mr,
+                                            OopsInGenClosure* cl, CardTableRS* ct,
+                                            uint n_threads);
+
+  // This is an array, one element per covered region of the card table.
+  // Each entry is itself an array, with one element per chunk in the
+  // covered region.  Each entry of these arrays is the lowest non-clean
+  // card of the corresponding chunk containing part of an object from the
+  // previous chunk, or else NULL.
+  typedef jbyte*  CardPtr;
+  typedef CardPtr* CardArr;
+  CardArr* _lowest_non_clean;
+  size_t*  _lowest_non_clean_chunk_size;
+  uintptr_t* _lowest_non_clean_base_chunk_index;
+  int* _last_LNC_resizing_collection;
+
+  // Initializes "lowest_non_clean" to point to the array for the region
+  // covering "sp", and "lowest_non_clean_base_chunk_index" to the chunk
+  // index of the corresponding to the first element of that array.
+  // Ensures that these arrays are of sufficient size, allocating if necessary.
+  // May be called by several threads concurrently.
+  void get_LNC_array_for_space(Space* sp,
+                               jbyte**& lowest_non_clean,
+                               uintptr_t& lowest_non_clean_base_chunk_index,
+                               size_t& lowest_non_clean_chunk_size);
+
+  // Returns the number of chunks necessary to cover "mr".
+  size_t chunks_to_cover(MemRegion mr) {
+    return (size_t)(addr_to_chunk_index(mr.last()) -
+                    addr_to_chunk_index(mr.start()) + 1);
+  }
+
+  // Returns the index of the chunk in a stride which
+  // covers the given address.
+  uintptr_t addr_to_chunk_index(const void* addr) {
+    uintptr_t card = (uintptr_t) byte_for(addr);
+    return card / ParGCCardsPerStrideChunk;
+  }
+
+  // Apply cl, which must either itself apply dcto_cl or be dcto_cl,
+  // to the cards in the stride (of n_strides) within the given space.
+  void process_stride(Space* sp,
+                      MemRegion used,
+                      jint stride, int n_strides,
+                      OopsInGenClosure* cl,
+                      CardTableRS* ct,
+                      jbyte** lowest_non_clean,
+                      uintptr_t lowest_non_clean_base_chunk_index,
+                      size_t lowest_non_clean_chunk_size);
+
+  // Makes sure that chunk boundaries are handled appropriately, by
+  // adjusting the min_done of dcto_cl, and by using a special card-table
+  // value to indicate how min_done should be set.
+  void process_chunk_boundaries(Space* sp,
+                                DirtyCardToOopClosure* dcto_cl,
+                                MemRegion chunk_mr,
+                                MemRegion used,
+                                jbyte** lowest_non_clean,
+                                uintptr_t lowest_non_clean_base_chunk_index,
+                                size_t    lowest_non_clean_chunk_size);
+
+};
+
+template<>
+struct BarrierSet::GetName<CardTableModRefBSForCTRS> {
+  static const BarrierSet::Name value = BarrierSet::CardTableForRS;
+};
+
+#endif // include guard
+
--- a/src/share/vm/gc/shared/cardTableRS.cpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/gc/shared/cardTableRS.cpp	Thu Jul 23 22:31:10 2015 -0400
@@ -240,7 +240,7 @@
 // cur-younger-gen                ==> cur_younger_gen
 // cur_youngergen_and_prev_nonclean_card ==> no change.
 void CardTableRS::write_ref_field_gc_par(void* field, oop new_val) {
-  jbyte* entry = ct_bs()->byte_for(field);
+  jbyte* entry = _ct_bs->byte_for(field);
   do {
     jbyte entry_val = *entry;
     // We put this first because it's probably the most common case.
@@ -398,10 +398,10 @@
   jbyte* cur_entry = byte_for(used.start());
   jbyte* limit = byte_after(used.last());
   while (cur_entry < limit) {
-    if (*cur_entry == CardTableModRefBS::clean_card) {
+    if (*cur_entry == clean_card_val()) {
       jbyte* first_dirty = cur_entry+1;
       while (first_dirty < limit &&
-             *first_dirty == CardTableModRefBS::clean_card) {
+             *first_dirty == clean_card_val()) {
         first_dirty++;
       }
       // If the first object is a regular object, and it has a
@@ -418,7 +418,7 @@
               !boundary_obj->is_typeArray()) {
             guarantee(cur_entry > byte_for(used.start()),
                       "else boundary would be boundary_block");
-            if (*byte_for(boundary_block) != CardTableModRefBS::clean_card) {
+            if (*byte_for(boundary_block) != clean_card_val()) {
               begin = boundary_block + s->block_size(boundary_block);
               start_block = begin;
             }
--- a/src/share/vm/gc/shared/cardTableRS.hpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/gc/shared/cardTableRS.hpp	Thu Jul 23 22:31:10 2015 -0400
@@ -25,7 +25,7 @@
 #ifndef SHARE_VM_GC_SHARED_CARDTABLERS_HPP
 #define SHARE_VM_GC_SHARED_CARDTABLERS_HPP
 
-#include "gc/shared/cardTableModRefBS.hpp"
+#include "gc/shared/cardTableModRefBSForCTRS.hpp"
 #include "gc/shared/genRemSet.hpp"
 #include "memory/memRegion.hpp"
 
@@ -42,16 +42,16 @@
   friend class ClearNoncleanCardWrapper;
 
   static jbyte clean_card_val() {
-    return CardTableModRefBS::clean_card;
+    return CardTableModRefBSForCTRS::clean_card;
   }
 
   static intptr_t clean_card_row() {
-    return CardTableModRefBS::clean_card_row;
+    return CardTableModRefBSForCTRS::clean_card_row;
   }
 
   static bool
   card_is_dirty_wrt_gen_iter(jbyte cv) {
-    return CardTableModRefBS::card_is_dirty_wrt_gen_iter(cv);
+    return CardTableModRefBSForCTRS::card_is_dirty_wrt_gen_iter(cv);
   }
 
   CardTableModRefBSForCTRS* _ct_bs;
@@ -61,17 +61,17 @@
   void verify_space(Space* s, HeapWord* gen_start);
 
   enum ExtendedCardValue {
-    youngergen_card   = CardTableModRefBS::CT_MR_BS_last_reserved + 1,
+    youngergen_card   = CardTableModRefBSForCTRS::CT_MR_BS_last_reserved + 1,
     // These are for parallel collection.
     // There are three P (parallel) youngergen card values.  In general, this
     // needs to be more than the number of generations (including the perm
     // gen) that might have younger_refs_do invoked on them separately.  So
     // if we add more gens, we have to add more values.
-    youngergenP1_card  = CardTableModRefBS::CT_MR_BS_last_reserved + 2,
-    youngergenP2_card  = CardTableModRefBS::CT_MR_BS_last_reserved + 3,
-    youngergenP3_card  = CardTableModRefBS::CT_MR_BS_last_reserved + 4,
+    youngergenP1_card  = CardTableModRefBSForCTRS::CT_MR_BS_last_reserved + 2,
+    youngergenP2_card  = CardTableModRefBSForCTRS::CT_MR_BS_last_reserved + 3,
+    youngergenP3_card  = CardTableModRefBSForCTRS::CT_MR_BS_last_reserved + 4,
     cur_youngergen_and_prev_nonclean_card =
-      CardTableModRefBS::CT_MR_BS_last_reserved + 5
+      CardTableModRefBSForCTRS::CT_MR_BS_last_reserved + 5
   };
 
   // An array that contains, for each generation, the card table value last
@@ -107,7 +107,7 @@
   // *** GenRemSet functions.
   CardTableRS* as_CardTableRS() { return this; }
 
-  CardTableModRefBS* ct_bs() { return _ct_bs; }
+  CardTableModRefBSForCTRS* ct_bs() { return _ct_bs; }
 
   // Override.
   void prepare_for_younger_refs_iterate(bool parallel);
@@ -147,7 +147,7 @@
   void invalidate_or_clear(Generation* old_gen);
 
   static uintx ct_max_alignment_constraint() {
-    return CardTableModRefBS::ct_max_alignment_constraint();
+    return CardTableModRefBSForCTRS::ct_max_alignment_constraint();
   }
 
   jbyte* byte_for(void* p)     { return _ct_bs->byte_for(p); }
--- a/src/share/vm/oops/oop.hpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/oops/oop.hpp	Thu Jul 23 22:31:10 2015 -0400
@@ -200,7 +200,6 @@
 
   // Access to fields in a instanceOop through these methods.
   oop obj_field(int offset) const;
-  volatile oop obj_field_volatile(int offset) const;
   void obj_field_put(int offset, oop value);
   void obj_field_put_raw(int offset, oop value);
   void obj_field_put_volatile(int offset, oop value);
--- a/src/share/vm/oops/oop.inline.hpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/oops/oop.inline.hpp	Thu Jul 23 22:31:10 2015 -0400
@@ -284,11 +284,7 @@
     load_decode_heap_oop(obj_field_addr<narrowOop>(offset)) :
     load_decode_heap_oop(obj_field_addr<oop>(offset));
 }
-inline volatile oop oopDesc::obj_field_volatile(int offset) const {
-  volatile oop value = obj_field(offset);
-  OrderAccess::acquire();
-  return value;
-}
+
 inline void oopDesc::obj_field_put(int offset, oop value) {
   UseCompressedOops ? oop_store(obj_field_addr<narrowOop>(offset), value) :
                       oop_store(obj_field_addr<oop>(offset),       value);
--- a/src/share/vm/prims/jvmtiTagMap.cpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/prims/jvmtiTagMap.cpp	Thu Jul 23 22:31:10 2015 -0400
@@ -2824,7 +2824,7 @@
   if (klass->oop_is_instance()) {
     InstanceKlass* ik = InstanceKlass::cast(klass);
 
-    // ignore the class if it's has been initialized yet
+    // Ignore the class if it hasn't been initialized yet
     if (!ik->is_linked()) {
       return true;
     }
--- a/src/share/vm/runtime/arguments.cpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/runtime/arguments.cpp	Thu Jul 23 22:31:10 2015 -0400
@@ -788,9 +788,11 @@
   st->print_cr("VM Arguments:");
   if (num_jvm_flags() > 0) {
     st->print("jvm_flags: "); print_jvm_flags_on(st);
+    st->cr();
   }
   if (num_jvm_args() > 0) {
     st->print("jvm_args: "); print_jvm_args_on(st);
+    st->cr();
   }
   st->print_cr("java_command: %s", java_command() ? java_command() : "<unknown>");
   if (_java_class_path != NULL) {
@@ -800,12 +802,32 @@
   st->print_cr("Launcher Type: %s", _sun_java_launcher);
 }
 
+void Arguments::print_summary_on(outputStream* st) {
+  // Print the command line.  Environment variables that are helpful for
+  // reproducing the problem are written later in the hs_err file.
+  // flags are from setting file
+  if (num_jvm_flags() > 0) {
+    st->print_raw("Settings File: ");
+    print_jvm_flags_on(st);
+    st->cr();
+  }
+  // args are the command line and environment variable arguments.
+  st->print_raw("Command Line: ");
+  if (num_jvm_args() > 0) {
+    print_jvm_args_on(st);
+  }
+  // this is the classfile and any arguments to the java program
+  if (java_command() != NULL) {
+    st->print("%s", java_command());
+  }
+  st->cr();
+}
+
 void Arguments::print_jvm_flags_on(outputStream* st) {
   if (_num_jvm_flags > 0) {
     for (int i=0; i < _num_jvm_flags; i++) {
       st->print("%s ", _jvm_flags_array[i]);
     }
-    st->cr();
   }
 }
 
@@ -814,7 +836,6 @@
     for (int i=0; i < _num_jvm_args; i++) {
       st->print("%s ", _jvm_args_array[i]);
     }
-    st->cr();
   }
 }
 
--- a/src/share/vm/runtime/arguments.hpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/runtime/arguments.hpp	Thu Jul 23 22:31:10 2015 -0400
@@ -495,6 +495,7 @@
 
   // print jvm_flags, jvm_args and java_command
   static void print_on(outputStream* st);
+  static void print_summary_on(outputStream* st);
 
   // convenient methods to obtain / print jvm_flags and jvm_args
   static const char* jvm_flags()           { return build_resource_string(_jvm_flags_array, _num_jvm_flags); }
--- a/src/share/vm/runtime/mutexLocker.cpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/runtime/mutexLocker.cpp	Thu Jul 23 22:31:10 2015 -0400
@@ -83,7 +83,6 @@
 Monitor* DirtyCardQ_CBL_mon           = NULL;
 Mutex*   Shared_DirtyCardQ_lock       = NULL;
 Mutex*   ParGCRareEvent_lock          = NULL;
-Mutex*   EvacFailureStack_lock        = NULL;
 Mutex*   DerivedPointerTableGC_lock   = NULL;
 Mutex*   Compile_lock                 = NULL;
 Monitor* MethodCompileQueue_lock      = NULL;
@@ -201,7 +200,6 @@
     def(OldSets_lock               , Mutex  , leaf     ,   true,  Monitor::_safepoint_check_never);
     def(RootRegionScan_lock        , Monitor, leaf     ,   true,  Monitor::_safepoint_check_never);
     def(MMUTracker_lock            , Mutex  , leaf     ,   true,  Monitor::_safepoint_check_never);
-    def(EvacFailureStack_lock      , Mutex  , nonleaf  ,   true,  Monitor::_safepoint_check_never);
 
     def(StringDedupQueue_lock      , Monitor, leaf,        true,  Monitor::_safepoint_check_never);
     def(StringDedupTable_lock      , Mutex  , leaf,        true,  Monitor::_safepoint_check_never);
--- a/src/share/vm/runtime/mutexLocker.hpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/runtime/mutexLocker.hpp	Thu Jul 23 22:31:10 2015 -0400
@@ -87,7 +87,6 @@
                                                  // non-Java threads.
                                                  // (see option ExplicitGCInvokesConcurrent)
 extern Mutex*   ParGCRareEvent_lock;             // Synchronizes various (rare) parallel GC ops.
-extern Mutex*   EvacFailureStack_lock;           // guards the evac failure scan stack
 extern Mutex*   Compile_lock;                    // a lock held when Compilation is updating code (used to block CodeCache traversal, CHA updates, etc)
 extern Monitor* MethodCompileQueue_lock;         // a lock held when method compilations are enqueued, dequeued
 extern Monitor* CompileThread_lock;              // a lock held by compile threads during compilation system initialization
--- a/src/share/vm/runtime/os.cpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/runtime/os.cpp	Thu Jul 23 22:31:10 2015 -0400
@@ -843,6 +843,28 @@
   pd_print_cpu_info(st, buf, buflen);
 }
 
+// Print a one line string summarizing the cpu, number of cores, memory, and operating system version
+void os::print_summary_info(outputStream* st, char* buf, size_t buflen) {
+  st->print("Host: ");
+#ifndef PRODUCT
+  if (get_host_name(buf, buflen)) {
+    st->print("%s, ", buf);
+  }
+#endif // PRODUCT
+  get_summary_cpu_info(buf, buflen);
+  st->print("%s, ", buf);
+  size_t mem = physical_memory()/G;
+  if (mem == 0) {  // for low memory systems
+    mem = physical_memory()/M;
+    st->print("%d cores, %dM, ", processor_count(), mem);
+  } else {
+    st->print("%d cores, %dG, ", processor_count(), mem);
+  }
+  get_summary_os_info(buf, buflen);
+  st->print_raw(buf);
+  st->cr();
+}
+
 void os::print_date_and_time(outputStream *st, char* buf, size_t buflen) {
   const int secs_per_day  = 86400;
   const int secs_per_hour = 3600;
@@ -850,12 +872,19 @@
 
   time_t tloc;
   (void)time(&tloc);
-  st->print("time: %s", ctime(&tloc));  // ctime adds newline.
+  char* timestring = ctime(&tloc);  // ctime adds newline.
+  // edit out the newline
+  char* nl = strchr(timestring, '\n');
+  if (nl != NULL) {
+    *nl = '\0';
+  }
 
   struct tm tz;
   if (localtime_pd(&tloc, &tz) != NULL) {
     ::strftime(buf, buflen, "%Z", &tz);
-    st->print_cr("timezone: %s", buf);
+    st->print("Time: %s %s", timestring, buf);
+  } else {
+    st->print("Time: %s", timestring);
   }
 
   double t = os::elapsedTime();
@@ -872,7 +901,7 @@
   int elmins = (eltime - day_secs - hour_secs) / secs_per_min;
   int minute_secs = elmins * secs_per_min;
   int elsecs = (eltime - day_secs - hour_secs - minute_secs);
-  st->print_cr("elapsed time: %d seconds (%dd %dh %dm %ds)", eltime, eldays, elhours, elmins, elsecs);
+  st->print_cr(" elapsed time: %d seconds (%dd %dh %dm %ds)", eltime, eldays, elhours, elmins, elsecs);
 }
 
 // moved from debug.cpp (used to be find()) but still called from there
--- a/src/share/vm/runtime/os.hpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/runtime/os.hpp	Thu Jul 23 22:31:10 2015 -0400
@@ -150,6 +150,11 @@
 
   static size_t page_size_for_region(size_t region_size, size_t min_pages, bool must_be_aligned);
 
+  // Get summary strings for system information in buffer provided
+  static bool  get_host_name(char* buf, size_t buflen) PRODUCT_RETURN_(return false;);  // true if available
+  static void  get_summary_cpu_info(char* buf, size_t buflen);
+  static void  get_summary_os_info(char* buf, size_t buflen);
+
  public:
   static void init(void);                      // Called before command line parsing
   static void init_before_ergo(void);          // Called after command line parsing
@@ -590,6 +595,7 @@
   static void print_os_info_brief(outputStream* st);
   static void print_cpu_info(outputStream* st, char* buf, size_t buflen);
   static void pd_print_cpu_info(outputStream* st, char* buf, size_t buflen);
+  static void print_summary_info(outputStream* st, char* buf, size_t buflen);
   static void print_memory_info(outputStream* st);
   static void print_dll_info(outputStream* st);
   static void print_environment_variables(outputStream* st, const char** env_list);
--- a/src/share/vm/runtime/thread.cpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/runtime/thread.cpp	Thu Jul 23 22:31:10 2015 -0400
@@ -2739,6 +2739,9 @@
     if (ct->env() != NULL) {
       ct->env()->metadata_do(f);
     }
+    if (ct->task() != NULL) {
+      ct->task()->metadata_do(f);
+    }
   }
 }
 
--- a/src/share/vm/runtime/vframe.cpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/runtime/vframe.cpp	Thu Jul 23 22:31:10 2015 -0400
@@ -148,8 +148,7 @@
   if (obj.not_null()) {
     st->print("\t- %s <" INTPTR_FORMAT "> ", lock_state, (address)obj());
     if (obj->klass() == SystemDictionary::Class_klass()) {
-      Klass* target_klass = java_lang_Class::as_Klass(obj());
-      st->print_cr("(a java.lang.Class for %s)", InstanceKlass::cast(target_klass)->external_name());
+      st->print_cr("(a java.lang.Class for %s)", java_lang_Class::as_external_name(obj()));
     } else {
       Klass* k = obj->klass();
       st->print_cr("(a %s)", k->external_name());
--- a/src/share/vm/services/heapDumper.cpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/services/heapDumper.cpp	Thu Jul 23 22:31:10 2015 -0400
@@ -899,6 +899,11 @@
   assert(klass->oop_is_instance(), "not an InstanceKlass");
   InstanceKlass* ik = (InstanceKlass*)klass;
 
+  // Ignore the class if it hasn't been initialized yet
+  if (!ik->is_linked()) {
+    return;
+  }
+
   writer->write_u1(HPROF_GC_CLASS_DUMP);
 
   // class ID
--- a/src/share/vm/shark/sharkBuilder.cpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/shark/sharkBuilder.cpp	Thu Jul 23 22:31:10 2015 -0400
@@ -25,6 +25,8 @@
 
 #include "precompiled.hpp"
 #include "ci/ciMethod.hpp"
+#include "gc/shared/barrierSet.hpp"
+#include "gc/shared/cardTableModRefBS.hpp"
 #include "memory/resourceArea.hpp"
 #include "oops/method.hpp"
 #include "runtime/os.hpp"
@@ -442,7 +444,7 @@
     Unimplemented();
 
   CreateStore(
-    LLVMValue::jbyte_constant(CardTableModRefBS::dirty_card),
+    LLVMValue::jbyte_constant(CardTableModRefBS::dirty_card_val()),
     CreateIntToPtr(
       CreateAdd(
         LLVMValue::intptr_constant(
--- a/src/share/vm/shark/sharkBuilder.hpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/shark/sharkBuilder.hpp	Thu Jul 23 22:31:10 2015 -0400
@@ -27,8 +27,6 @@
 #define SHARE_VM_SHARK_SHARKBUILDER_HPP
 
 #include "ci/ciType.hpp"
-#include "gc/shared/barrierSet.hpp"
-#include "gc/shared/cardTableModRefBS.hpp"
 #include "shark/llvmHeaders.hpp"
 #include "shark/llvmValue.hpp"
 #include "shark/sharkCodeBuffer.hpp"
@@ -38,6 +36,8 @@
 #include "utilities/debug.hpp"
 #include "utilities/sizes.hpp"
 
+class BarrierSet;
+
 class SharkBuilder : public llvm::IRBuilder<> {
   friend class SharkCompileInvariants;
 
--- a/src/share/vm/utilities/vmError.cpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/utilities/vmError.cpp	Thu Jul 23 22:31:10 2015 -0400
@@ -306,6 +306,30 @@
 #endif // ZERO
 }
 
+void VMError::print_oom_reasons(outputStream* st) {
+  st->print_cr("# Possible reasons:");
+  st->print_cr("#   The system is out of physical RAM or swap space");
+  st->print_cr("#   In 32 bit mode, the process size limit was hit");
+  st->print_cr("# Possible solutions:");
+  st->print_cr("#   Reduce memory load on the system");
+  st->print_cr("#   Increase physical memory or swap space");
+  st->print_cr("#   Check if swap backing store is full");
+  st->print_cr("#   Use 64 bit Java on a 64 bit OS");
+  st->print_cr("#   Decrease Java heap size (-Xmx/-Xms)");
+  st->print_cr("#   Decrease number of Java threads");
+  st->print_cr("#   Decrease Java thread stack sizes (-Xss)");
+  st->print_cr("#   Set larger code cache with -XX:ReservedCodeCacheSize=");
+  st->print_cr("# This output file may be truncated or incomplete.");
+}
+
+const char* VMError::gc_mode() {
+  if (UseG1GC)            return "g1 gc";
+  if (UseParallelGC)      return "parallel gc";
+  if (UseConcMarkSweepGC) return "concurrent mark sweep gc";
+  if (UseSerialGC)        return "serial gc";
+  return "ERROR in GC mode";
+}
+
 // This is the main function to report a fatal error. Only one thread can
 // call this function, so we don't need to worry about MT-safety. But it's
 // possible that the error handler itself may crash or die on an internal
@@ -358,21 +382,21 @@
 
   // test secondary error handling. Test it twice, to test that resetting
   // error handler after a secondary crash works.
-  STEP(11, "(test secondary crash 1)")
+  STEP(20, "(test secondary crash 1)")
     if (_verbose && TestCrashInErrorHandler != 0) {
       st->print_cr("Will crash now (TestCrashInErrorHandler=%d)...",
         TestCrashInErrorHandler);
       controlled_crash(TestCrashInErrorHandler);
     }
 
-  STEP(12, "(test secondary crash 2)")
+  STEP(30, "(test secondary crash 2)")
     if (_verbose && TestCrashInErrorHandler != 0) {
       st->print_cr("Will crash now (TestCrashInErrorHandler=%d)...",
         TestCrashInErrorHandler);
       controlled_crash(TestCrashInErrorHandler);
     }
 
-  STEP(13, "(test safefetch in error handler)")
+  STEP(40, "(test safefetch in error handler)")
     // test whether it is safe to use SafeFetch32 in Crash Handler. Test twice
     // to test that resetting the signal handler works correctly.
     if (_verbose && TestSafeFetchInErrorHandler) {
@@ -393,7 +417,7 @@
     }
 #endif // PRODUCT
 
-  STEP(15, "(printing type of error)")
+  STEP(50, "(printing type of error)")
 
      switch(_id) {
        case OOM_MALLOC_ERROR:
@@ -418,19 +442,7 @@
          }
          // In error file give some solutions
          if (_verbose) {
-           st->print_cr("# Possible reasons:");
-           st->print_cr("#   The system is out of physical RAM or swap space");
-           st->print_cr("#   In 32 bit mode, the process size limit was hit");
-           st->print_cr("# Possible solutions:");
-           st->print_cr("#   Reduce memory load on the system");
-           st->print_cr("#   Increase physical memory or swap space");
-           st->print_cr("#   Check if swap backing store is full");
-           st->print_cr("#   Use 64 bit Java on a 64 bit OS");
-           st->print_cr("#   Decrease Java heap size (-Xmx/-Xms)");
-           st->print_cr("#   Decrease number of Java threads");
-           st->print_cr("#   Decrease Java thread stack sizes (-Xss)");
-           st->print_cr("#   Set larger code cache with -XX:ReservedCodeCacheSize=");
-           st->print_cr("# This output file may be truncated or incomplete.");
+           print_oom_reasons(st);
          } else {
            return;  // that's enough for the screen
          }
@@ -440,7 +452,7 @@
          break;
      }
 
-  STEP(20, "(printing exception/signal name)")
+  STEP(60, "(printing exception/signal name)")
 
      st->print_cr("#");
      st->print("#  ");
@@ -470,14 +482,14 @@
        }
      }
 
-  STEP(30, "(printing current thread and pid)")
+  STEP(70, "(printing current thread and pid)")
 
      // process id, thread id
      st->print(", pid=%d", os::current_process_id());
      st->print(", tid=" INTPTR_FORMAT, os::current_thread_id());
      st->cr();
 
-  STEP(40, "(printing error message)")
+  STEP(80, "(printing error message)")
 
      if (should_report_bug(_id)) {  // already printed the message.
        // error message
@@ -488,7 +500,7 @@
        }
     }
 
-  STEP(50, "(printing Java version string)")
+  STEP(90, "(printing Java version string)")
 
      // VM version
      st->print_cr("#");
@@ -498,15 +510,18 @@
      const char* runtime_version = JDK_Version::runtime_version() != NULL ?
                                   JDK_Version::runtime_version() : "";
      st->print_cr("# JRE version: %s (%s) (build %s)", runtime_name, buf, runtime_version);
-     st->print_cr("# Java VM: %s (%s %s %s %s)",
+     // This is the long version with some default settings added
+     st->print_cr("# Java VM: %s (%s, %s%s%s, %s, %s)",
                    Abstract_VM_Version::vm_name(),
                    Abstract_VM_Version::vm_release(),
                    Abstract_VM_Version::vm_info_string(),
-                   Abstract_VM_Version::vm_platform_string(),
-                   UseCompressedOops ? "compressed oops" : ""
+                   TieredCompilation ? ", tiered" : "",
+                   UseCompressedOops ? ", compressed oops" : "",
+                   gc_mode(),
+                   Abstract_VM_Version::vm_platform_string()
                  );
 
-  STEP(60, "(printing problematic frame)")
+  STEP(100, "(printing problematic frame)")
 
      // Print current frame if we have a context (i.e. it's a crash)
      if (_context) {
@@ -517,7 +532,8 @@
        st->cr();
        st->print_cr("#");
      }
-  STEP(63, "(printing core file information)")
+
+  STEP(110, "(printing core file information)")
     st->print("# ");
     if (CreateCoredumpOnCrash) {
       if (coredump_status) {
@@ -531,13 +547,42 @@
     st->cr();
     st->print_cr("#");
 
-  STEP(65, "(printing bug submit message)")
+  STEP(120, "(printing bug submit message)")
 
      if (should_report_bug(_id) && _verbose) {
        print_bug_submit_message(st, _thread);
      }
 
-  STEP(70, "(printing thread)" )
+  STEP(130, "(printing summary)" )
+
+     if (_verbose) {
+       st->cr();
+       st->print_cr("---------------  S U M M A R Y ------------");
+       st->cr();
+     }
+
+  STEP(140, "(printing VM option summary)" )
+
+     if (_verbose) {
+       // VM options
+       Arguments::print_summary_on(st);
+       st->cr();
+     }
+
+  STEP(150, "(printing summary machine and OS info)")
+
+     if (_verbose) {
+       os::print_summary_info(st, buf, sizeof(buf));
+     }
+
+
+  STEP(160, "(printing date and time)" )
+
+     if (_verbose) {
+       os::print_date_and_time(st, buf, sizeof(buf));
+     }
+
+  STEP(170, "(printing thread)" )
 
      if (_verbose) {
        st->cr();
@@ -545,7 +590,7 @@
        st->cr();
      }
 
-  STEP(80, "(printing current thread)" )
+  STEP(180, "(printing current thread)" )
 
      // current thread
      if (_verbose) {
@@ -559,31 +604,20 @@
        st->cr();
      }
 
-  STEP(90, "(printing siginfo)" )
+  STEP(190, "(printing current compile task)" )
 
-     // signal no, signal code, address that caused the fault
-     if (_verbose && _siginfo) {
-       os::print_siginfo(st, _siginfo);
-       st->cr();
+     if (_verbose && _thread && _thread->is_Compiler_thread()) {
+        CompilerThread* t = (CompilerThread*)_thread;
+        if (t->task()) {
+           st->cr();
+           st->print_cr("Current CompileTask:");
+           t->task()->print_line_on_error(st, buf, sizeof(buf));
+           st->cr();
+        }
      }
 
-  STEP(100, "(printing registers, top of stack, instructions near pc)")
 
-     // registers, top of stack, instructions near pc
-     if (_verbose && _context) {
-       os::print_context(st, _context);
-       st->cr();
-     }
-
-  STEP(105, "(printing register info)")
-
-     // decode register contents if possible
-     if (_verbose && _context && Universe::is_fully_initialized()) {
-       os::print_register_info(st, _context);
-       st->cr();
-     }
-
-  STEP(110, "(printing stack bounds)" )
+  STEP(200, "(printing stack bounds)" )
 
      if (_verbose) {
        st->print("Stack: ");
@@ -614,7 +648,7 @@
        st->cr();
      }
 
-  STEP(120, "(printing native stack)" )
+  STEP(210, "(printing native stack)" )
 
    if (_verbose) {
      if (os::platform_print_native_stack(st, _context, buf, sizeof(buf))) {
@@ -628,13 +662,13 @@
      }
    }
 
-  STEP(130, "(printing Java stack)" )
+  STEP(220, "(printing Java stack)" )
 
      if (_verbose && _thread && _thread->is_Java_thread()) {
        print_stack_trace(st, (JavaThread*)_thread, buf, sizeof(buf));
      }
 
-  STEP(135, "(printing target Java thread stack)" )
+  STEP(230, "(printing target Java thread stack)" )
 
      // printing Java thread stack trace if it is involved in GC crash
      if (_verbose && _thread && (_thread->is_Named_thread())) {
@@ -645,7 +679,32 @@
        }
      }
 
-  STEP(140, "(printing VM operation)" )
+  STEP(240, "(printing siginfo)" )
+
+     // signal no, signal code, address that caused the fault
+     if (_verbose && _siginfo) {
+       st->cr();
+       os::print_siginfo(st, _siginfo);
+       st->cr();
+     }
+
+  STEP(250, "(printing register info)")
+
+     // decode register contents if possible
+     if (_verbose && _context && Universe::is_fully_initialized()) {
+       os::print_register_info(st, _context);
+       st->cr();
+     }
+
+  STEP(260, "(printing registers, top of stack, instructions near pc)")
+
+     // registers, top of stack, instructions near pc
+     if (_verbose && _context) {
+       os::print_context(st, _context);
+       st->cr();
+     }
+
+  STEP(270, "(printing VM operation)" )
 
      if (_verbose && _thread && _thread->is_VM_thread()) {
         VMThread* t = (VMThread*)_thread;
@@ -657,19 +716,7 @@
         }
      }
 
-  STEP(150, "(printing current compile task)" )
-
-     if (_verbose && _thread && _thread->is_Compiler_thread()) {
-        CompilerThread* t = (CompilerThread*)_thread;
-        if (t->task()) {
-           st->cr();
-           st->print_cr("Current CompileTask:");
-           t->task()->print_line_on_error(st, buf, sizeof(buf));
-           st->cr();
-        }
-     }
-
-  STEP(160, "(printing process)" )
+  STEP(280, "(printing process)" )
 
      if (_verbose) {
        st->cr();
@@ -677,7 +724,7 @@
        st->cr();
      }
 
-  STEP(170, "(printing all threads)" )
+  STEP(290, "(printing all threads)" )
 
      // all threads
      if (_verbose && _thread) {
@@ -685,7 +732,7 @@
        st->cr();
      }
 
-  STEP(175, "(printing VM state)" )
+  STEP(300, "(printing VM state)" )
 
      if (_verbose) {
        // Safepoint state
@@ -707,7 +754,7 @@
        st->cr();
      }
 
-  STEP(180, "(printing owned locks on error)" )
+  STEP(310, "(printing owned locks on error)" )
 
      // mutexes/monitors that currently have an owner
      if (_verbose) {
@@ -715,7 +762,7 @@
        st->cr();
      }
 
-  STEP(182, "(printing number of OutOfMemoryError and StackOverflow exceptions)")
+  STEP(320, "(printing number of OutOfMemoryError and StackOverflow exceptions)")
 
      if (_verbose && Exceptions::has_exception_counts()) {
        st->print_cr("OutOfMemory and StackOverflow Exception counts:");
@@ -723,7 +770,7 @@
        st->cr();
      }
 
-  STEP(185, "(printing compressed oops mode")
+  STEP(330, "(printing compressed oops mode")
 
      if (_verbose && UseCompressedOops) {
        Universe::print_compressed_oops_mode(st);
@@ -733,7 +780,7 @@
        st->cr();
      }
 
-  STEP(190, "(printing heap information)" )
+  STEP(340, "(printing heap information)" )
 
      if (_verbose && Universe::is_fully_initialized()) {
        Universe::heap()->print_on_error(st);
@@ -743,7 +790,7 @@
        st->cr();
      }
 
-  STEP(195, "(printing code cache information)" )
+  STEP(350, "(printing code cache information)" )
 
      if (_verbose && Universe::is_fully_initialized()) {
        // print code cache information before vm abort
@@ -751,14 +798,14 @@
        st->cr();
      }
 
-  STEP(200, "(printing ring buffers)" )
+  STEP(360, "(printing ring buffers)" )
 
      if (_verbose) {
        Events::print_all(st);
        st->cr();
      }
 
-  STEP(205, "(printing dynamic libraries)" )
+  STEP(370, "(printing dynamic libraries)" )
 
      if (_verbose) {
        // dynamic libraries, or memory map
@@ -766,7 +813,7 @@
        st->cr();
      }
 
-  STEP(210, "(printing VM options)" )
+  STEP(380, "(printing VM options)" )
 
      if (_verbose) {
        // VM options
@@ -774,33 +821,33 @@
        st->cr();
      }
 
-  STEP(215, "(printing warning if internal testing API used)" )
+  STEP(390, "(printing warning if internal testing API used)" )
 
      if (WhiteBox::used()) {
        st->print_cr("Unsupported internal testing APIs have been used.");
        st->cr();
      }
 
-  STEP(220, "(printing environment variables)" )
+  STEP(400, "(printing all environment variables)" )
 
      if (_verbose) {
        os::print_environment_variables(st, env_list);
        st->cr();
      }
 
-  STEP(225, "(printing signal handlers)" )
+  STEP(410, "(printing signal handlers)" )
 
      if (_verbose) {
        os::print_signal_handlers(st, buf, sizeof(buf));
        st->cr();
      }
 
-  STEP(228, "(Native Memory Tracking)" )
+  STEP(420, "(Native Memory Tracking)" )
      if (_verbose) {
        MemTracker::error_report(st);
      }
 
-  STEP(230, "" )
+  STEP(430, "(printing system)" )
 
      if (_verbose) {
        st->cr();
@@ -808,48 +855,39 @@
        st->cr();
      }
 
-  STEP(240, "(printing OS information)" )
+  STEP(440, "(printing OS information)" )
 
      if (_verbose) {
        os::print_os_info(st);
        st->cr();
      }
 
-  STEP(250, "(printing CPU info)" )
+  STEP(450, "(printing CPU info)" )
      if (_verbose) {
        os::print_cpu_info(st, buf, sizeof(buf));
        st->cr();
      }
 
-  STEP(260, "(printing memory info)" )
+  STEP(460, "(printing memory info)" )
 
      if (_verbose) {
        os::print_memory_info(st);
        st->cr();
      }
 
-  STEP(270, "(printing internal vm info)" )
+  STEP(470, "(printing internal vm info)" )
 
      if (_verbose) {
        st->print_cr("vm_info: %s", Abstract_VM_Version::internal_vm_info_string());
        st->cr();
      }
 
-  STEP(280, "(printing date and time)" )
-
-     if (_verbose) {
-       os::print_date_and_time(st, buf, sizeof(buf));
-       st->cr();
-     }
-
-#ifndef PRODUCT
   // print a defined marker to show that error handling finished correctly.
-  STEP(290, "(printing end marker)" )
+  STEP(480, "(printing end marker)" )
 
      if (_verbose) {
        st->print_cr("END.");
      }
-#endif
 
   END
 
--- a/src/share/vm/utilities/vmError.hpp	Thu Jul 23 15:18:56 2015 -0400
+++ b/src/share/vm/utilities/vmError.hpp	Thu Jul 23 22:31:10 2015 -0400
@@ -89,6 +89,9 @@
   static void print_stack_trace(outputStream* st, JavaThread* jt,
                                 char* buf, int buflen, bool verbose = false);
 
+  static const char* gc_mode();
+  static void print_oom_reasons(outputStream* st);
+
   // accessor
   const char* message() const    { return _message; }
   const char* detail_msg() const { return _detail_msg; }
--- a/test/gc/g1/TestLargePageUseForAuxMemory.java	Thu Jul 23 15:18:56 2015 -0400
+++ b/test/gc/g1/TestLargePageUseForAuxMemory.java	Thu Jul 23 22:31:10 2015 -0400
@@ -94,29 +94,47 @@
         output.shouldHaveExitValue(0);
     }
 
+    private static long gcd(long x, long y) {
+        while (x > 0) {
+            long t = x;
+            x = y % x;
+            y = t;
+        }
+        return y;
+    }
+
+    private static long lcm(long x, long y) {
+        return x * (y / gcd(x, y));
+    }
+
     public static void main(String[] args) throws Exception {
         if (!Platform.isDebugBuild()) {
             System.out.println("Skip tests on non-debug builds because the required option TracePageSizes is a debug-only option.");
             return;
         }
 
+        // Size that a single card covers.
+        final int cardSize = 512;
         WhiteBox wb = WhiteBox.getWhiteBox();
         smallPageSize = wb.getVMPageSize();
         largePageSize = wb.getVMLargePageSize();
         allocGranularity = wb.getVMAllocationGranularity();
+        final long heapAlignment = lcm(cardSize * smallPageSize, largePageSize);
 
         if (largePageSize == 0) {
             System.out.println("Skip tests because large page support does not seem to be available on this platform.");
             return;
         }
+        if (largePageSize == smallPageSize) {
+            System.out.println("Skip tests because large page support does not seem to be available on this platform." +
+                               "Small and large page size are the same.");
+            return;
+        }
 
         // To get large pages for the card table etc. we need at least a 1G heap (with 4k page size).
         // 32 bit systems will have problems reserving such an amount of contiguous space, so skip the
         // test there.
         if (!Platform.is32bit()) {
-            // Size that a single card covers.
-            final int cardSize = 512;
-
             final long heapSizeForCardTableUsingLargePages = largePageSize * cardSize;
             final long heapSizeDiffForCardTable = Math.max(Math.max(allocGranularity * cardSize, HEAP_REGION_SIZE), largePageSize);
 
@@ -131,7 +149,8 @@
         // everywhere.
         final int bitmapTranslationFactor = 8 * 8; // ObjectAlignmentInBytes * BitsPerByte
         final long heapSizeForBitmapUsingLargePages = largePageSize * bitmapTranslationFactor;
-        final long heapSizeDiffForBitmap = Math.max(Math.max(allocGranularity * bitmapTranslationFactor, HEAP_REGION_SIZE), largePageSize);
+        final long heapSizeDiffForBitmap = Math.max(Math.max(allocGranularity * bitmapTranslationFactor, HEAP_REGION_SIZE),
+                                                    Math.max(largePageSize, heapAlignment));
 
         Asserts.assertGT(heapSizeForBitmapUsingLargePages, heapSizeDiffForBitmap,
                          "To test we would require to use an invalid heap size");
--- a/test/runtime/ErrorHandling/CreateCoredumpOnCrash.java	Thu Jul 23 15:18:56 2015 -0400
+++ b/test/runtime/ErrorHandling/CreateCoredumpOnCrash.java	Thu Jul 23 22:31:10 2015 -0400
@@ -38,7 +38,7 @@
 public class CreateCoredumpOnCrash {
     private static class Crasher {
         public static void main(String[] args) {
-            Utils.getUnsafe().getInt(0);
+            Utils.getUnsafe().putInt(0L, 0);
         }
     }
 
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/runtime/verifier/PrimIntArray.java	Thu Jul 23 22:31:10 2015 -0400
@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2015, 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 8129895
+ * @summary Throw VerifyError when checking assignability of primitive arrays
+ * that are not identical.  For example, [I is not assignable to [B.
+ * @compile primArray.jasm
+ * @compile primArray49.jasm
+ * @run main/othervm -Xverify:all PrimIntArray
+ */
+
+// Test that an int[] is not assignable to byte[].
+public class PrimIntArray {
+
+    public static void main(String args[]) throws Throwable {
+        System.out.println("Regression test for bug 8129895");
+
+        try {
+            Class newClass = Class.forName("primArray");
+            throw new RuntimeException("Expected VerifyError exception not thrown with new verifier");
+        } catch (java.lang.VerifyError e) {
+            System.out.println("Test PrimIntArray passed with new verifier");
+        }
+
+        try {
+            Class newClass = Class.forName("primArray49");
+            throw new RuntimeException("Expected VerifyError exception not thrown by old verifier");
+        } catch (java.lang.VerifyError e) {
+            System.out.println("Test PrimIntArray passed with old verifier");
+        }
+    }
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/runtime/verifier/primArray.jasm	Thu Jul 23 22:31:10 2015 -0400
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2015, 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.
+ *
+ */
+
+// Method castToByteArray() tries to return an array of ints when an array
+// of bytes is expected.
+super class primArray
+version 52:0
+{
+
+    public Method "<init>":"()V"
+    stack 1 locals 1
+    {
+        aload_0;
+        invokespecial Method java/lang/Object."<init>":"()V";
+        return;
+    }
+
+    public static Method castToByteArray:"([I)[B"
+        stack 1 locals 1
+    {
+        aload_0;
+        areturn;
+    }
+
+} // end Class primArray
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/runtime/verifier/primArray49.jasm	Thu Jul 23 22:31:10 2015 -0400
@@ -0,0 +1,46 @@
+/*
+ * Copyright (c) 2015, 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.
+ *
+ */
+
+// Method castToByteArray() tries to return an array of ints when an array
+// of bytes is expected.
+super class primArray49
+version 49:0
+{
+
+    public Method "<init>":"()V"
+    stack 1 locals 1
+    {
+        aload_0;
+        invokespecial Method java/lang/Object."<init>":"()V";
+        return;
+    }
+
+    public static Method castToByteArray:"([I)[B"
+        stack 1 locals 1
+    {
+        aload_0;
+        areturn;
+    }
+
+} // end Class primArray49
--- a/test/serviceability/sa/TestStackTrace.java	Thu Jul 23 15:18:56 2015 -0400
+++ b/test/serviceability/sa/TestStackTrace.java	Thu Jul 23 22:31:10 2015 -0400
@@ -34,7 +34,6 @@
  * @test
  * @library /../../test/lib/share/classes
  * @library /testlibrary
- * @ignore 8129971
  * @build jdk.test.lib.*
  * @build jdk.test.lib.apps.*
  * @run main TestStackTrace