changeset 50709:dc18db671651

8203288: PPC64 and s390 fail to build after JDK-8199712 (Flight Recorder) Reviewed-by: shade
author mdoerr
date Thu, 17 May 2018 14:16:49 +0200
parents 062fcc6d183b
children e2d9b38630c3
files src/hotspot/cpu/ppc/vm_version_ext_ppc.cpp src/hotspot/cpu/ppc/vm_version_ext_ppc.hpp src/hotspot/cpu/s390/vm_version_ext_s390.cpp src/hotspot/cpu/s390/vm_version_ext_s390.hpp src/hotspot/os/aix/os_aix.cpp src/hotspot/os/aix/os_perf_aix.cpp src/hotspot/os/linux/os_perf_linux.cpp src/hotspot/os_cpu/aix_ppc/thread_aix_ppc.cpp src/hotspot/os_cpu/aix_ppc/thread_aix_ppc.hpp src/hotspot/os_cpu/linux_ppc/thread_linux_ppc.cpp src/hotspot/os_cpu/linux_ppc/thread_linux_ppc.hpp src/hotspot/os_cpu/linux_s390/thread_linux_s390.cpp src/hotspot/os_cpu/linux_s390/thread_linux_s390.hpp src/hotspot/share/jfr/utilities/jfrBigEndian.hpp
diffstat 14 files changed, 1370 insertions(+), 12 deletions(-) [+]
line wrap: on
line diff
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/cpu/ppc/vm_version_ext_ppc.cpp	Thu May 17 14:16:49 2018 +0200
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2013, 2018, 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 "jvm.h"
+#include "memory/allocation.hpp"
+#include "memory/allocation.inline.hpp"
+#include "vm_version_ext_ppc.hpp"
+
+// VM_Version_Ext statics
+int   VM_Version_Ext::_no_of_threads = 0;
+int   VM_Version_Ext::_no_of_cores = 0;
+int   VM_Version_Ext::_no_of_sockets = 0;
+char  VM_Version_Ext::_cpu_name[CPU_TYPE_DESC_BUF_SIZE] = {0};
+char  VM_Version_Ext::_cpu_desc[CPU_DETAILED_DESC_BUF_SIZE] = {0};
+
+// get cpu information.
+bool VM_Version_Ext::initialize_cpu_information(void) {
+  // Not yet implemented.
+  return false;
+}
+
+int VM_Version_Ext::number_of_threads(void) {
+  initialize_cpu_information();
+  return _no_of_threads;
+}
+
+int VM_Version_Ext::number_of_cores(void) {
+  initialize_cpu_information();
+  return _no_of_cores;
+}
+
+int VM_Version_Ext::number_of_sockets(void) {
+  initialize_cpu_information();
+  return _no_of_sockets;
+}
+
+const char* VM_Version_Ext::cpu_name(void) {
+  if (!initialize_cpu_information()) {
+    return NULL;
+  }
+  char* tmp = NEW_C_HEAP_ARRAY_RETURN_NULL(char, CPU_TYPE_DESC_BUF_SIZE, mtTracing);
+  if (NULL == tmp) {
+    return NULL;
+  }
+  strncpy(tmp, _cpu_name, CPU_TYPE_DESC_BUF_SIZE);
+  return tmp;
+}
+
+const char* VM_Version_Ext::cpu_description(void) {
+  if (!initialize_cpu_information()) {
+    return NULL;
+  }
+  char* tmp = NEW_C_HEAP_ARRAY_RETURN_NULL(char, CPU_DETAILED_DESC_BUF_SIZE, mtTracing);
+  if (NULL == tmp) {
+    return NULL;
+  }
+  strncpy(tmp, _cpu_desc, CPU_DETAILED_DESC_BUF_SIZE);
+  return tmp;
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/cpu/ppc/vm_version_ext_ppc.hpp	Thu May 17 14:16:49 2018 +0200
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2013, 2018, 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 CPU_PPC_VM_VM_VERSION_EXT_PPC_HPP
+#define CPU_PPC_VM_VM_VERSION_EXT_PPC_HPP
+
+#include "utilities/macros.hpp"
+#include "vm_version_ppc.hpp"
+
+#define CPU_INFO        "cpu_info"
+#define CPU_TYPE        "fpu_type"
+#define CPU_DESCRIPTION "implementation"
+#define CHIP_ID         "chip_id"
+#define CORE_ID         "core_id"
+
+class VM_Version_Ext : public VM_Version {
+ private:
+
+  static const size_t      CPU_TYPE_DESC_BUF_SIZE = 256;
+  static const size_t      CPU_DETAILED_DESC_BUF_SIZE = 4096;
+
+  static int               _no_of_threads;
+  static int               _no_of_cores;
+  static int               _no_of_sockets;
+  static char              _cpu_name[CPU_TYPE_DESC_BUF_SIZE];
+  static char              _cpu_desc[CPU_DETAILED_DESC_BUF_SIZE];
+
+  static bool initialize_cpu_information(void);
+
+ public:
+
+  static int number_of_threads(void);
+  static int number_of_cores(void);
+  static int number_of_sockets(void);
+
+  static const char* cpu_name(void);
+  static const char* cpu_description(void);
+};
+
+#endif // CPU_PPC_VM_VM_VERSION_EXT_PPC_HPP
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/cpu/s390/vm_version_ext_s390.cpp	Thu May 17 14:16:49 2018 +0200
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2013, 2018, 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 "jvm.h"
+#include "memory/allocation.hpp"
+#include "memory/allocation.inline.hpp"
+#include "vm_version_ext_s390.hpp"
+
+// VM_Version_Ext statics
+int   VM_Version_Ext::_no_of_threads = 0;
+int   VM_Version_Ext::_no_of_cores = 0;
+int   VM_Version_Ext::_no_of_sockets = 0;
+char  VM_Version_Ext::_cpu_name[CPU_TYPE_DESC_BUF_SIZE] = {0};
+char  VM_Version_Ext::_cpu_desc[CPU_DETAILED_DESC_BUF_SIZE] = {0};
+
+// get cpu information.
+bool VM_Version_Ext::initialize_cpu_information(void) {
+  // Not yet implemented.
+  return false;
+}
+
+int VM_Version_Ext::number_of_threads(void) {
+  initialize_cpu_information();
+  return _no_of_threads;
+}
+
+int VM_Version_Ext::number_of_cores(void) {
+  initialize_cpu_information();
+  return _no_of_cores;
+}
+
+int VM_Version_Ext::number_of_sockets(void) {
+  initialize_cpu_information();
+  return _no_of_sockets;
+}
+
+const char* VM_Version_Ext::cpu_name(void) {
+  if (!initialize_cpu_information()) {
+    return NULL;
+  }
+  char* tmp = NEW_C_HEAP_ARRAY_RETURN_NULL(char, CPU_TYPE_DESC_BUF_SIZE, mtTracing);
+  if (NULL == tmp) {
+    return NULL;
+  }
+  strncpy(tmp, _cpu_name, CPU_TYPE_DESC_BUF_SIZE);
+  return tmp;
+}
+
+const char* VM_Version_Ext::cpu_description(void) {
+  if (!initialize_cpu_information()) {
+    return NULL;
+  }
+  char* tmp = NEW_C_HEAP_ARRAY_RETURN_NULL(char, CPU_DETAILED_DESC_BUF_SIZE, mtTracing);
+  if (NULL == tmp) {
+    return NULL;
+  }
+  strncpy(tmp, _cpu_desc, CPU_DETAILED_DESC_BUF_SIZE);
+  return tmp;
+}
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/cpu/s390/vm_version_ext_s390.hpp	Thu May 17 14:16:49 2018 +0200
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2013, 2018, 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 CPU_S390_VM_VM_VERSION_EXT_S390_HPP
+#define CPU_S390_VM_VM_VERSION_EXT_S390_HPP
+
+#include "utilities/macros.hpp"
+#include "vm_version_s390.hpp"
+
+#define CPU_INFO        "cpu_info"
+#define CPU_TYPE        "fpu_type"
+#define CPU_DESCRIPTION "implementation"
+#define CHIP_ID         "chip_id"
+#define CORE_ID         "core_id"
+
+class VM_Version_Ext : public VM_Version {
+ private:
+
+  static const size_t      CPU_TYPE_DESC_BUF_SIZE = 256;
+  static const size_t      CPU_DETAILED_DESC_BUF_SIZE = 4096;
+
+  static int               _no_of_threads;
+  static int               _no_of_cores;
+  static int               _no_of_sockets;
+  static char              _cpu_name[CPU_TYPE_DESC_BUF_SIZE];
+  static char              _cpu_desc[CPU_DETAILED_DESC_BUF_SIZE];
+
+  static bool initialize_cpu_information(void);
+
+ public:
+
+  static int number_of_threads(void);
+  static int number_of_cores(void);
+  static int number_of_sockets(void);
+
+  static const char* cpu_name(void);
+  static const char* cpu_description(void);
+};
+
+#endif // CPU_S390_VM_VM_VERSION_EXT_S390_HPP
--- a/src/hotspot/os/aix/os_aix.cpp	Thu May 17 11:03:19 2018 +0000
+++ b/src/hotspot/os/aix/os_aix.cpp	Thu May 17 14:16:49 2018 +0200
@@ -1377,6 +1377,21 @@
   snprintf(buf, buflen, "%s %s", name.release, name.version);
 }
 
+int os::get_loaded_modules_info(os::LoadedModulesCallbackFunc callback, void *param) {
+  // Not yet implemented.
+  return 0;
+}
+
+void os::print_os_info_brief(outputStream* st) {
+  uint32_t ver = os::Aix::os_version();
+  st->print_cr("AIX kernel version %u.%u.%u.%u",
+               (ver >> 24) & 0xFF, (ver >> 16) & 0xFF, (ver >> 8) & 0xFF, ver & 0xFF);
+
+  os::Posix::print_uname_info(st);
+
+  // Linux uses print_libversion_info(st); here.
+}
+
 void os::print_os_info(outputStream* st) {
   st->print("OS:");
 
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/os/aix/os_perf_aix.cpp	Thu May 17 14:16:49 2018 +0200
@@ -0,0 +1,1043 @@
+/*
+ * Copyright (c) 2012, 2018, 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 "jvm.h"
+#include "memory/allocation.inline.hpp"
+#include "os_aix.inline.hpp"
+#include "runtime/os.hpp"
+#include "runtime/os_perf.hpp"
+
+#include CPU_HEADER(vm_version_ext)
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/resource.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <dirent.h>
+#include <stdlib.h>
+#include <dlfcn.h>
+#include <pthread.h>
+#include <limits.h>
+
+/**
+   /proc/[number]/stat
+              Status information about the process.  This is used by ps(1).  It is defined in /usr/src/linux/fs/proc/array.c.
+
+              The fields, in order, with their proper scanf(3) format specifiers, are:
+
+              1. pid %d The process id.
+
+              2. comm %s
+                     The filename of the executable, in parentheses.  This is visible whether or not the executable is swapped out.
+
+              3. state %c
+                     One  character  from  the  string "RSDZTW" where R is running, S is sleeping in an interruptible wait, D is waiting in uninterruptible disk
+                     sleep, Z is zombie, T is traced or stopped (on a signal), and W is paging.
+
+              4. ppid %d
+                     The PID of the parent.
+
+              5. pgrp %d
+                     The process group ID of the process.
+
+              6. session %d
+                     The session ID of the process.
+
+              7. tty_nr %d
+                     The tty the process uses.
+
+              8. tpgid %d
+                     The process group ID of the process which currently owns the tty that the process is connected to.
+
+              9. flags %lu
+                     The flags of the process.  The math bit is decimal 4, and the traced bit is decimal 10.
+
+              10. minflt %lu
+                     The number of minor faults the process has made which have not required loading a memory page from disk.
+
+              11. cminflt %lu
+                     The number of minor faults that the process's waited-for children have made.
+
+              12. majflt %lu
+                     The number of major faults the process has made which have required loading a memory page from disk.
+
+              13. cmajflt %lu
+                     The number of major faults that the process's waited-for children have made.
+
+              14. utime %lu
+                     The number of jiffies that this process has been scheduled in user mode.
+
+              15. stime %lu
+                     The number of jiffies that this process has been scheduled in kernel mode.
+
+              16. cutime %ld
+                     The number of jiffies that this process's waited-for children have been scheduled in user mode. (See also times(2).)
+
+              17. cstime %ld
+                     The number of jiffies that this process' waited-for children have been scheduled in kernel mode.
+
+              18. priority %ld
+                     The standard nice value, plus fifteen.  The value is never negative in the kernel.
+
+              19. nice %ld
+                     The nice value ranges from 19 (nicest) to -19 (not nice to others).
+
+              20. 0 %ld  This value is hard coded to 0 as a placeholder for a removed field.
+
+              21. itrealvalue %ld
+                     The time in jiffies before the next SIGALRM is sent to the process due to an interval timer.
+
+              22. starttime %lu
+                     The time in jiffies the process started after system boot.
+
+              23. vsize %lu
+                     Virtual memory size in bytes.
+
+              24. rss %ld
+                     Resident Set Size: number of pages the process has in real memory, minus 3 for administrative purposes. This is just the pages which  count
+                     towards text, data, or stack space.  This does not include pages which have not been demand-loaded in, or which are swapped out.
+
+              25. rlim %lu
+                     Current limit in bytes on the rss of the process (usually 4294967295 on i386).
+
+              26. startcode %lu
+                     The address above which program text can run.
+
+              27. endcode %lu
+                     The address below which program text can run.
+
+              28. startstack %lu
+                     The address of the start of the stack.
+
+              29. kstkesp %lu
+                     The current value of esp (stack pointer), as found in the kernel stack page for the process.
+
+              30. kstkeip %lu
+                     The current EIP (instruction pointer).
+
+              31. signal %lu
+                     The bitmap of pending signals (usually 0).
+
+              32. blocked %lu
+                     The bitmap of blocked signals (usually 0, 2 for shells).
+
+              33. sigignore %lu
+                     The bitmap of ignored signals.
+
+              34. sigcatch %lu
+                     The bitmap of catched signals.
+
+              35. wchan %lu
+                     This  is the "channel" in which the process is waiting.  It is the address of a system call, and can be looked up in a namelist if you need
+                     a textual name.  (If you have an up-to-date /etc/psdatabase, then try ps -l to see the WCHAN field in action.)
+
+              36. nswap %lu
+                     Number of pages swapped - not maintained.
+
+              37. cnswap %lu
+                     Cumulative nswap for child processes.
+
+              38. exit_signal %d
+                     Signal to be sent to parent when we die.
+
+              39. processor %d
+                     CPU number last executed on.
+
+
+
+ ///// SSCANF FORMAT STRING. Copy and use.
+
+field:        1  2  3  4  5  6  7  8  9   10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34  35  36  37  38 39
+format:       %d %s %c %d %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %ld %ld %ld %ld %ld %ld %lu %lu %ld %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %d %d
+
+
+*/
+
+/**
+ * For platforms that have them, when declaring
+ * a printf-style function,
+ *   formatSpec is the parameter number (starting at 1)
+ *       that is the format argument ("%d pid %s")
+ *   params is the parameter number where the actual args to
+ *       the format starts. If the args are in a va_list, this
+ *       should be 0.
+ */
+#ifndef PRINTF_ARGS
+#  define PRINTF_ARGS(formatSpec,  params) ATTRIBUTE_PRINTF(formatSpec, params)
+#endif
+
+#ifndef SCANF_ARGS
+#  define SCANF_ARGS(formatSpec,   params) ATTRIBUTE_SCANF(formatSpec, params)
+#endif
+
+#ifndef _PRINTFMT_
+#  define _PRINTFMT_
+#endif
+
+#ifndef _SCANFMT_
+#  define _SCANFMT_
+#endif
+
+
+struct CPUPerfTicks {
+  uint64_t  used;
+  uint64_t  usedKernel;
+  uint64_t  total;
+};
+
+typedef enum {
+  CPU_LOAD_VM_ONLY,
+  CPU_LOAD_GLOBAL,
+} CpuLoadTarget;
+
+enum {
+  UNDETECTED,
+  UNDETECTABLE,
+  LINUX26_NPTL,
+  BAREMETAL
+};
+
+struct CPUPerfCounters {
+  int   nProcs;
+  CPUPerfTicks jvmTicks;
+  CPUPerfTicks* cpus;
+};
+
+static double get_cpu_load(int which_logical_cpu, CPUPerfCounters* counters, double* pkernelLoad, CpuLoadTarget target);
+
+/** reads /proc/<pid>/stat data, with some checks and some skips.
+ *  Ensure that 'fmt' does _NOT_ contain the first two "%d %s"
+ */
+static int SCANF_ARGS(2, 0) vread_statdata(const char* procfile, _SCANFMT_ const char* fmt, va_list args) {
+  FILE*f;
+  int n;
+  char buf[2048];
+
+  if ((f = fopen(procfile, "r")) == NULL) {
+    return -1;
+  }
+
+  if ((n = fread(buf, 1, sizeof(buf), f)) != -1) {
+    char *tmp;
+
+    buf[n-1] = '\0';
+    /** skip through pid and exec name. */
+    if ((tmp = strrchr(buf, ')')) != NULL) {
+      // skip the ')' and the following space
+      // but check that buffer is long enough
+      tmp += 2;
+      if (tmp < buf + n) {
+        n = vsscanf(tmp, fmt, args);
+      }
+    }
+  }
+
+  fclose(f);
+
+  return n;
+}
+
+static int SCANF_ARGS(2, 3) read_statdata(const char* procfile, _SCANFMT_ const char* fmt, ...) {
+  int   n;
+  va_list args;
+
+  va_start(args, fmt);
+  n = vread_statdata(procfile, fmt, args);
+  va_end(args);
+  return n;
+}
+
+static FILE* open_statfile(void) {
+  FILE *f;
+
+  if ((f = fopen("/proc/stat", "r")) == NULL) {
+    static int haveWarned = 0;
+    if (!haveWarned) {
+      haveWarned = 1;
+    }
+  }
+  return f;
+}
+
+static void
+next_line(FILE *f) {
+  int c;
+  do {
+    c = fgetc(f);
+  } while (c != '\n' && c != EOF);
+}
+
+/**
+ * Return the total number of ticks since the system was booted.
+ * If the usedTicks parameter is not NULL, it will be filled with
+ * the number of ticks spent on actual processes (user, system or
+ * nice processes) since system boot. Note that this is the total number
+ * of "executed" ticks on _all_ CPU:s, that is on a n-way system it is
+ * n times the number of ticks that has passed in clock time.
+ *
+ * Returns a negative value if the reading of the ticks failed.
+ */
+static OSReturn get_total_ticks(int which_logical_cpu, CPUPerfTicks* pticks) {
+  FILE*         fh;
+  uint64_t      userTicks, niceTicks, systemTicks, idleTicks;
+  uint64_t      iowTicks = 0, irqTicks = 0, sirqTicks= 0;
+  int           logical_cpu = -1;
+  const int     expected_assign_count = (-1 == which_logical_cpu) ? 4 : 5;
+  int           n;
+
+  if ((fh = open_statfile()) == NULL) {
+    return OS_ERR;
+  }
+  if (-1 == which_logical_cpu) {
+    n = fscanf(fh, "cpu " UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT " "
+            UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT,
+            &userTicks, &niceTicks, &systemTicks, &idleTicks,
+            &iowTicks, &irqTicks, &sirqTicks);
+  } else {
+    // Move to next line
+    next_line(fh);
+
+    // find the line for requested cpu faster to just iterate linefeeds?
+    for (int i = 0; i < which_logical_cpu; i++) {
+      next_line(fh);
+    }
+
+    n = fscanf(fh, "cpu%u " UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT " "
+               UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT,
+               &logical_cpu, &userTicks, &niceTicks,
+               &systemTicks, &idleTicks, &iowTicks, &irqTicks, &sirqTicks);
+  }
+
+  fclose(fh);
+  if (n < expected_assign_count || logical_cpu != which_logical_cpu) {
+#ifdef DEBUG_LINUX_PROC_STAT
+    vm_fprintf(stderr, "[stat] read failed");
+#endif
+    return OS_ERR;
+  }
+
+#ifdef DEBUG_LINUX_PROC_STAT
+  vm_fprintf(stderr, "[stat] read "
+          UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT " "
+          UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT " \n",
+          userTicks, niceTicks, systemTicks, idleTicks,
+          iowTicks, irqTicks, sirqTicks);
+#endif
+
+  pticks->used       = userTicks + niceTicks;
+  pticks->usedKernel = systemTicks + irqTicks + sirqTicks;
+  pticks->total      = userTicks + niceTicks + systemTicks + idleTicks +
+                       iowTicks + irqTicks + sirqTicks;
+
+  return OS_OK;
+}
+
+
+static int get_systemtype(void) {
+  static int procEntriesType = UNDETECTED;
+  DIR *taskDir;
+
+  if (procEntriesType != UNDETECTED) {
+    return procEntriesType;
+  }
+
+  // Check whether we have a task subdirectory
+  if ((taskDir = opendir("/proc/self/task")) == NULL) {
+    procEntriesType = UNDETECTABLE;
+  } else {
+    // The task subdirectory exists; we're on a Linux >= 2.6 system
+    closedir(taskDir);
+    procEntriesType = LINUX26_NPTL;
+  }
+
+  return procEntriesType;
+}
+
+/** read user and system ticks from a named procfile, assumed to be in 'stat' format then. */
+static int read_ticks(const char* procfile, uint64_t* userTicks, uint64_t* systemTicks) {
+  return read_statdata(procfile, "%*c %*d %*d %*d %*d %*d %*u %*u %*u %*u %*u " UINT64_FORMAT " " UINT64_FORMAT,
+    userTicks, systemTicks);
+}
+
+/**
+ * Return the number of ticks spent in any of the processes belonging
+ * to the JVM on any CPU.
+ */
+static OSReturn get_jvm_ticks(CPUPerfTicks* pticks) {
+  uint64_t userTicks;
+  uint64_t systemTicks;
+
+  if (get_systemtype() != LINUX26_NPTL) {
+    return OS_ERR;
+  }
+
+  if (read_ticks("/proc/self/stat", &userTicks, &systemTicks) != 2) {
+    return OS_ERR;
+  }
+
+  // get the total
+  if (get_total_ticks(-1, pticks) != OS_OK) {
+    return OS_ERR;
+  }
+
+  pticks->used       = userTicks;
+  pticks->usedKernel = systemTicks;
+
+  return OS_OK;
+}
+
+/**
+ * Return the load of the CPU as a double. 1.0 means the CPU process uses all
+ * available time for user or system processes, 0.0 means the CPU uses all time
+ * being idle.
+ *
+ * Returns a negative value if there is a problem in determining the CPU load.
+ */
+static double get_cpu_load(int which_logical_cpu, CPUPerfCounters* counters, double* pkernelLoad, CpuLoadTarget target) {
+  uint64_t udiff, kdiff, tdiff;
+  CPUPerfTicks* pticks;
+  CPUPerfTicks  tmp;
+  double user_load;
+
+  *pkernelLoad = 0.0;
+
+  if (target == CPU_LOAD_VM_ONLY) {
+    pticks = &counters->jvmTicks;
+  } else if (-1 == which_logical_cpu) {
+    pticks = &counters->cpus[counters->nProcs];
+  } else {
+    pticks = &counters->cpus[which_logical_cpu];
+  }
+
+  tmp = *pticks;
+
+  if (target == CPU_LOAD_VM_ONLY) {
+    if (get_jvm_ticks(pticks) != OS_OK) {
+      return -1.0;
+    }
+  } else if (get_total_ticks(which_logical_cpu, pticks) != OS_OK) {
+    return -1.0;
+  }
+
+  // seems like we sometimes end up with less kernel ticks when
+  // reading /proc/self/stat a second time, timing issue between cpus?
+  if (pticks->usedKernel < tmp.usedKernel) {
+    kdiff = 0;
+  } else {
+    kdiff = pticks->usedKernel - tmp.usedKernel;
+  }
+  tdiff = pticks->total - tmp.total;
+  udiff = pticks->used - tmp.used;
+
+  if (tdiff == 0) {
+    return 0.0;
+  } else if (tdiff < (udiff + kdiff)) {
+    tdiff = udiff + kdiff;
+  }
+  *pkernelLoad = (kdiff / (double)tdiff);
+  // BUG9044876, normalize return values to sane values
+  *pkernelLoad = MAX2<double>(*pkernelLoad, 0.0);
+  *pkernelLoad = MIN2<double>(*pkernelLoad, 1.0);
+
+  user_load = (udiff / (double)tdiff);
+  user_load = MAX2<double>(user_load, 0.0);
+  user_load = MIN2<double>(user_load, 1.0);
+
+  return user_load;
+}
+
+static int SCANF_ARGS(1, 2) parse_stat(_SCANFMT_ const char* fmt, ...) {
+  FILE *f;
+  va_list args;
+
+  va_start(args, fmt);
+
+  if ((f = open_statfile()) == NULL) {
+    va_end(args);
+    return OS_ERR;
+  }
+  for (;;) {
+    char line[80];
+    if (fgets(line, sizeof(line), f) != NULL) {
+      if (vsscanf(line, fmt, args) == 1) {
+        fclose(f);
+        va_end(args);
+        return OS_OK;
+      }
+    } else {
+        fclose(f);
+        va_end(args);
+        return OS_ERR;
+    }
+  }
+}
+
+static int get_noof_context_switches(uint64_t* switches) {
+  return parse_stat("ctxt " UINT64_FORMAT "\n", switches);
+}
+
+/** returns boot time in _seconds_ since epoch */
+static int get_boot_time(uint64_t* time) {
+  return parse_stat("btime " UINT64_FORMAT "\n", time);
+}
+
+static int perf_context_switch_rate(double* rate) {
+  static pthread_mutex_t contextSwitchLock = PTHREAD_MUTEX_INITIALIZER;
+  static uint64_t      lastTime;
+  static uint64_t      lastSwitches;
+  static double        lastRate;
+
+  uint64_t lt = 0;
+  int res = 0;
+
+  if (lastTime == 0) {
+    uint64_t tmp;
+    if (get_boot_time(&tmp) < 0) {
+      return OS_ERR;
+    }
+    lt = tmp * 1000;
+  }
+
+  res = OS_OK;
+
+  pthread_mutex_lock(&contextSwitchLock);
+  {
+
+    uint64_t sw;
+    s8 t, d;
+
+    if (lastTime == 0) {
+      lastTime = lt;
+    }
+
+    t = os::javaTimeMillis();
+    d = t - lastTime;
+
+    if (d == 0) {
+      *rate = lastRate;
+    } else if (!get_noof_context_switches(&sw)) {
+      *rate      = ( (double)(sw - lastSwitches) / d ) * 1000;
+      lastRate     = *rate;
+      lastSwitches = sw;
+      lastTime     = t;
+    } else {
+      *rate = 0;
+      res   = OS_ERR;
+    }
+    if (*rate <= 0) {
+      *rate = 0;
+      lastRate = 0;
+    }
+  }
+  pthread_mutex_unlock(&contextSwitchLock);
+
+  return res;
+}
+
+class CPUPerformanceInterface::CPUPerformance : public CHeapObj<mtInternal> {
+  friend class CPUPerformanceInterface;
+ private:
+  CPUPerfCounters _counters;
+
+  int cpu_load(int which_logical_cpu, double* cpu_load);
+  int context_switch_rate(double* rate);
+  int cpu_load_total_process(double* cpu_load);
+  int cpu_loads_process(double* pjvmUserLoad, double* pjvmKernelLoad, double* psystemTotalLoad);
+
+ public:
+  CPUPerformance();
+  bool initialize();
+  ~CPUPerformance();
+};
+
+CPUPerformanceInterface::CPUPerformance::CPUPerformance() {
+  _counters.nProcs = os::active_processor_count();
+  _counters.cpus = NULL;
+}
+
+bool CPUPerformanceInterface::CPUPerformance::initialize() {
+  size_t tick_array_size = (_counters.nProcs +1) * sizeof(CPUPerfTicks);
+  _counters.cpus = (CPUPerfTicks*)NEW_C_HEAP_ARRAY(char, tick_array_size, mtInternal);
+  if (NULL == _counters.cpus) {
+    return false;
+  }
+  memset(_counters.cpus, 0, tick_array_size);
+
+  // For the CPU load total
+  get_total_ticks(-1, &_counters.cpus[_counters.nProcs]);
+
+  // For each CPU
+  for (int i = 0; i < _counters.nProcs; i++) {
+    get_total_ticks(i, &_counters.cpus[i]);
+  }
+  // For JVM load
+  get_jvm_ticks(&_counters.jvmTicks);
+
+  // initialize context switch system
+  // the double is only for init
+  double init_ctx_switch_rate;
+  perf_context_switch_rate(&init_ctx_switch_rate);
+
+  return true;
+}
+
+CPUPerformanceInterface::CPUPerformance::~CPUPerformance() {
+  if (_counters.cpus != NULL) {
+    FREE_C_HEAP_ARRAY(char, _counters.cpus);
+  }
+}
+
+int CPUPerformanceInterface::CPUPerformance::cpu_load(int which_logical_cpu, double* cpu_load) {
+  double u, s;
+  u = get_cpu_load(which_logical_cpu, &_counters, &s, CPU_LOAD_GLOBAL);
+  if (u < 0) {
+    *cpu_load = 0.0;
+    return OS_ERR;
+  }
+  // Cap total systemload to 1.0
+  *cpu_load = MIN2<double>((u + s), 1.0);
+  return OS_OK;
+}
+
+int CPUPerformanceInterface::CPUPerformance::cpu_load_total_process(double* cpu_load) {
+  double u, s;
+  u = get_cpu_load(-1, &_counters, &s, CPU_LOAD_VM_ONLY);
+  if (u < 0) {
+    *cpu_load = 0.0;
+    return OS_ERR;
+  }
+  *cpu_load = u + s;
+  return OS_OK;
+}
+
+int CPUPerformanceInterface::CPUPerformance::cpu_loads_process(double* pjvmUserLoad, double* pjvmKernelLoad, double* psystemTotalLoad) {
+  double u, s, t;
+
+  assert(pjvmUserLoad != NULL, "pjvmUserLoad not inited");
+  assert(pjvmKernelLoad != NULL, "pjvmKernelLoad not inited");
+  assert(psystemTotalLoad != NULL, "psystemTotalLoad not inited");
+
+  u = get_cpu_load(-1, &_counters, &s, CPU_LOAD_VM_ONLY);
+  if (u < 0) {
+    *pjvmUserLoad = 0.0;
+    *pjvmKernelLoad = 0.0;
+    *psystemTotalLoad = 0.0;
+    return OS_ERR;
+  }
+
+  cpu_load(-1, &t);
+  // clamp at user+system and 1.0
+  if (u + s > t) {
+    t = MIN2<double>(u + s, 1.0);
+  }
+
+  *pjvmUserLoad = u;
+  *pjvmKernelLoad = s;
+  *psystemTotalLoad = t;
+
+  return OS_OK;
+}
+
+int CPUPerformanceInterface::CPUPerformance::context_switch_rate(double* rate) {
+  return perf_context_switch_rate(rate);
+}
+
+CPUPerformanceInterface::CPUPerformanceInterface() {
+  _impl = NULL;
+}
+
+bool CPUPerformanceInterface::initialize() {
+  _impl = new CPUPerformanceInterface::CPUPerformance();
+  return NULL == _impl ? false : _impl->initialize();
+}
+
+CPUPerformanceInterface::~CPUPerformanceInterface() {
+  if (_impl != NULL) {
+    delete _impl;
+  }
+}
+
+int CPUPerformanceInterface::cpu_load(int which_logical_cpu, double* cpu_load) const {
+  return _impl->cpu_load(which_logical_cpu, cpu_load);
+}
+
+int CPUPerformanceInterface::cpu_load_total_process(double* cpu_load) const {
+  return _impl->cpu_load_total_process(cpu_load);
+}
+
+int CPUPerformanceInterface::cpu_loads_process(double* pjvmUserLoad, double* pjvmKernelLoad, double* psystemTotalLoad) const {
+  return _impl->cpu_loads_process(pjvmUserLoad, pjvmKernelLoad, psystemTotalLoad);
+}
+
+int CPUPerformanceInterface::context_switch_rate(double* rate) const {
+  return _impl->context_switch_rate(rate);
+}
+
+class SystemProcessInterface::SystemProcesses : public CHeapObj<mtInternal> {
+  friend class SystemProcessInterface;
+ private:
+  class ProcessIterator : public CHeapObj<mtInternal> {
+    friend class SystemProcessInterface::SystemProcesses;
+   private:
+    DIR*           _dir;
+    struct dirent* _entry;
+    bool           _valid;
+    char           _exeName[PATH_MAX];
+    char           _exePath[PATH_MAX];
+
+    ProcessIterator();
+    ~ProcessIterator();
+    bool initialize();
+
+    bool is_valid() const { return _valid; }
+    bool is_valid_entry(struct dirent* entry) const;
+    bool is_dir(const char* name) const;
+    int  fsize(const char* name, uint64_t& size) const;
+
+    char* allocate_string(const char* str) const;
+    void  get_exe_name();
+    char* get_exe_path();
+    char* get_cmdline();
+
+    int current(SystemProcess* process_info);
+    int next_process();
+  };
+
+  ProcessIterator* _iterator;
+  SystemProcesses();
+  bool initialize();
+  ~SystemProcesses();
+
+  //information about system processes
+  int system_processes(SystemProcess** system_processes, int* no_of_sys_processes) const;
+};
+
+bool SystemProcessInterface::SystemProcesses::ProcessIterator::is_dir(const char* name) const {
+  struct stat mystat;
+  int ret_val = 0;
+
+  ret_val = stat(name, &mystat);
+  if (ret_val < 0) {
+    return false;
+  }
+  ret_val = S_ISDIR(mystat.st_mode);
+  return ret_val > 0;
+}
+
+int SystemProcessInterface::SystemProcesses::ProcessIterator::fsize(const char* name, uint64_t& size) const {
+  assert(name != NULL, "name pointer is NULL!");
+  size = 0;
+  struct stat fbuf;
+
+  if (stat(name, &fbuf) < 0) {
+    return OS_ERR;
+  }
+  size = fbuf.st_size;
+  return OS_OK;
+}
+
+// if it has a numeric name, is a directory and has a 'stat' file in it
+bool SystemProcessInterface::SystemProcesses::ProcessIterator::is_valid_entry(struct dirent* entry) const {
+  char buffer[PATH_MAX];
+  uint64_t size = 0;
+
+  if (atoi(entry->d_name) != 0) {
+    jio_snprintf(buffer, PATH_MAX, "/proc/%s", entry->d_name);
+    buffer[PATH_MAX - 1] = '\0';
+
+    if (is_dir(buffer)) {
+      jio_snprintf(buffer, PATH_MAX, "/proc/%s/stat", entry->d_name);
+      buffer[PATH_MAX - 1] = '\0';
+      if (fsize(buffer, size) != OS_ERR) {
+        return true;
+      }
+    }
+  }
+  return false;
+}
+
+// get exe-name from /proc/<pid>/stat
+void SystemProcessInterface::SystemProcesses::ProcessIterator::get_exe_name() {
+  FILE* fp;
+  char  buffer[PATH_MAX];
+
+  jio_snprintf(buffer, PATH_MAX, "/proc/%s/stat", _entry->d_name);
+  buffer[PATH_MAX - 1] = '\0';
+  if ((fp = fopen(buffer, "r")) != NULL) {
+    if (fgets(buffer, PATH_MAX, fp) != NULL) {
+      char* start, *end;
+      // exe-name is between the first pair of ( and )
+      start = strchr(buffer, '(');
+      if (start != NULL && start[1] != '\0') {
+        start++;
+        end = strrchr(start, ')');
+        if (end != NULL) {
+          size_t len;
+          len = MIN2<size_t>(end - start, sizeof(_exeName) - 1);
+          memcpy(_exeName, start, len);
+          _exeName[len] = '\0';
+        }
+      }
+    }
+    fclose(fp);
+  }
+}
+
+// get command line from /proc/<pid>/cmdline
+char* SystemProcessInterface::SystemProcesses::ProcessIterator::get_cmdline() {
+  FILE* fp;
+  char  buffer[PATH_MAX];
+  char* cmdline = NULL;
+
+  jio_snprintf(buffer, PATH_MAX, "/proc/%s/cmdline", _entry->d_name);
+  buffer[PATH_MAX - 1] = '\0';
+  if ((fp = fopen(buffer, "r")) != NULL) {
+    size_t size = 0;
+    char   dummy;
+
+    // find out how long the file is (stat always returns 0)
+    while (fread(&dummy, 1, 1, fp) == 1) {
+      size++;
+    }
+    if (size > 0) {
+      cmdline = NEW_C_HEAP_ARRAY(char, size + 1, mtInternal);
+      if (cmdline != NULL) {
+        cmdline[0] = '\0';
+        if (fseek(fp, 0, SEEK_SET) == 0) {
+          if (fread(cmdline, 1, size, fp) == size) {
+            // the file has the arguments separated by '\0',
+            // so we translate '\0' to ' '
+            for (size_t i = 0; i < size; i++) {
+              if (cmdline[i] == '\0') {
+                cmdline[i] = ' ';
+              }
+            }
+            cmdline[size] = '\0';
+          }
+        }
+      }
+    }
+    fclose(fp);
+  }
+  return cmdline;
+}
+
+// get full path to exe from /proc/<pid>/exe symlink
+char* SystemProcessInterface::SystemProcesses::ProcessIterator::get_exe_path() {
+  char buffer[PATH_MAX];
+
+  jio_snprintf(buffer, PATH_MAX, "/proc/%s/exe", _entry->d_name);
+  buffer[PATH_MAX - 1] = '\0';
+  return realpath(buffer, _exePath);
+}
+
+char* SystemProcessInterface::SystemProcesses::ProcessIterator::allocate_string(const char* str) const {
+  if (str != NULL) {
+    size_t len = strlen(str);
+    char* tmp = NEW_C_HEAP_ARRAY(char, len+1, mtInternal);
+    strncpy(tmp, str, len);
+    tmp[len] = '\0';
+    return tmp;
+  }
+  return NULL;
+}
+
+int SystemProcessInterface::SystemProcesses::ProcessIterator::current(SystemProcess* process_info) {
+  if (!is_valid()) {
+    return OS_ERR;
+  }
+
+  process_info->set_pid(atoi(_entry->d_name));
+
+  get_exe_name();
+  process_info->set_name(allocate_string(_exeName));
+
+  if (get_exe_path() != NULL) {
+     process_info->set_path(allocate_string(_exePath));
+  }
+
+  char* cmdline = NULL;
+  cmdline = get_cmdline();
+  if (cmdline != NULL) {
+    process_info->set_command_line(allocate_string(cmdline));
+    FREE_C_HEAP_ARRAY(char, cmdline);
+  }
+
+  return OS_OK;
+}
+
+int SystemProcessInterface::SystemProcesses::ProcessIterator::next_process() {
+  struct dirent* entry;
+
+  if (!is_valid()) {
+    return OS_ERR;
+  }
+
+  do {
+      entry = os::readdir(_dir, _entry);
+    if (entry == NULL) {
+      // error
+      _valid = false;
+      return OS_ERR;
+    }
+    if (_entry == NULL) {
+      // reached end
+      _valid = false;
+      return OS_ERR;
+    }
+  } while(!is_valid_entry(_entry));
+
+  _valid = true;
+  return OS_OK;
+}
+
+SystemProcessInterface::SystemProcesses::ProcessIterator::ProcessIterator() {
+  _dir = NULL;
+  _entry = NULL;
+  _valid = false;
+}
+
+bool SystemProcessInterface::SystemProcesses::ProcessIterator::initialize() {
+  // Not yet implemented.
+  return false;
+}
+
+SystemProcessInterface::SystemProcesses::ProcessIterator::~ProcessIterator() {
+  if (_entry != NULL) {
+    FREE_C_HEAP_ARRAY(char, _entry);
+  }
+  if (_dir != NULL) {
+    closedir(_dir);
+  }
+}
+
+SystemProcessInterface::SystemProcesses::SystemProcesses() {
+  _iterator = NULL;
+}
+
+bool SystemProcessInterface::SystemProcesses::initialize() {
+  _iterator = new SystemProcessInterface::SystemProcesses::ProcessIterator();
+  return NULL == _iterator ? false : _iterator->initialize();
+}
+
+SystemProcessInterface::SystemProcesses::~SystemProcesses() {
+  if (_iterator != NULL) {
+    delete _iterator;
+  }
+}
+
+int SystemProcessInterface::SystemProcesses::system_processes(SystemProcess** system_processes, int* no_of_sys_processes) const {
+  assert(system_processes != NULL, "system_processes pointer is NULL!");
+  assert(no_of_sys_processes != NULL, "system_processes counter pointers is NULL!");
+  assert(_iterator != NULL, "iterator is NULL!");
+
+  // initialize pointers
+  *no_of_sys_processes = 0;
+  *system_processes = NULL;
+
+  while (_iterator->is_valid()) {
+    SystemProcess* tmp = new SystemProcess();
+    _iterator->current(tmp);
+
+    //if already existing head
+    if (*system_processes != NULL) {
+      //move "first to second"
+      tmp->set_next(*system_processes);
+    }
+    // new head
+    *system_processes = tmp;
+    // increment
+    (*no_of_sys_processes)++;
+    // step forward
+    _iterator->next_process();
+  }
+  return OS_OK;
+}
+
+int SystemProcessInterface::system_processes(SystemProcess** system_procs, int* no_of_sys_processes) const {
+  return _impl->system_processes(system_procs, no_of_sys_processes);
+}
+
+SystemProcessInterface::SystemProcessInterface() {
+  _impl = NULL;
+}
+
+bool SystemProcessInterface::initialize() {
+  _impl = new SystemProcessInterface::SystemProcesses();
+  return NULL == _impl ? false : _impl->initialize();
+}
+
+SystemProcessInterface::~SystemProcessInterface() {
+  if (_impl != NULL) {
+    delete _impl;
+  }
+}
+
+CPUInformationInterface::CPUInformationInterface() {
+  _cpu_info = NULL;
+}
+
+bool CPUInformationInterface::initialize() {
+  _cpu_info = new CPUInformation();
+  if (NULL == _cpu_info) {
+    return false;
+  }
+  _cpu_info->set_number_of_hardware_threads(VM_Version_Ext::number_of_threads());
+  _cpu_info->set_number_of_cores(VM_Version_Ext::number_of_cores());
+  _cpu_info->set_number_of_sockets(VM_Version_Ext::number_of_sockets());
+  _cpu_info->set_cpu_name(VM_Version_Ext::cpu_name());
+  _cpu_info->set_cpu_description(VM_Version_Ext::cpu_description());
+
+  return true;
+}
+
+CPUInformationInterface::~CPUInformationInterface() {
+  if (_cpu_info != NULL) {
+    if (_cpu_info->cpu_name() != NULL) {
+      const char* cpu_name = _cpu_info->cpu_name();
+      FREE_C_HEAP_ARRAY(char, cpu_name);
+      _cpu_info->set_cpu_name(NULL);
+    }
+    if (_cpu_info->cpu_description() != NULL) {
+       const char* cpu_desc = _cpu_info->cpu_description();
+       FREE_C_HEAP_ARRAY(char, cpu_desc);
+      _cpu_info->set_cpu_description(NULL);
+    }
+    delete _cpu_info;
+  }
+}
+
+int CPUInformationInterface::cpu_information(CPUInformation& cpu_info) {
+  if (_cpu_info == NULL) {
+    return OS_ERR;
+  }
+
+  cpu_info = *_cpu_info; // shallow copy assignment
+  return OS_OK;
+}
--- a/src/hotspot/os/linux/os_perf_linux.cpp	Thu May 17 11:03:19 2018 +0000
+++ b/src/hotspot/os/linux/os_perf_linux.cpp	Thu May 17 14:16:49 2018 +0200
@@ -29,17 +29,7 @@
 #include "runtime/os.hpp"
 #include "runtime/os_perf.hpp"
 
-#ifdef X86
-#include "vm_version_ext_x86.hpp"
-#endif
-#ifdef ARM
-#include "vm_version_ext_arm.hpp"
-#endif
-#ifndef ARM
-#ifdef AARCH64
-#include "vm_version_ext_aarch64.hpp"
-#endif
-#endif
+#include CPU_HEADER(vm_version_ext)
 
 #include <stdio.h>
 #include <stdarg.h>
--- a/src/hotspot/os_cpu/aix_ppc/thread_aix_ppc.cpp	Thu May 17 11:03:19 2018 +0000
+++ b/src/hotspot/os_cpu/aix_ppc/thread_aix_ppc.cpp	Thu May 17 14:16:49 2018 +0200
@@ -40,6 +40,13 @@
   return frame(sp, pc);
 }
 
+bool JavaThread::pd_get_top_frame_for_profiling(frame* fr_addr, void* ucontext, bool isInJava) {
+  ucontext_t* uc = (ucontext_t*) ucontext;
+  *fr_addr = frame((intptr_t*)uc->uc_mcontext.jmp_context.gpr[1/*REG_SP*/],
+                   (address)uc->uc_mcontext.jmp_context.iar);
+  return true;
+}
+
 // Forte Analyzer AsyncGetCallTrace profiling support is not implemented on Aix/PPC.
 bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext, bool isInJava) {
   Unimplemented();
--- a/src/hotspot/os_cpu/aix_ppc/thread_aix_ppc.hpp	Thu May 17 11:03:19 2018 +0000
+++ b/src/hotspot/os_cpu/aix_ppc/thread_aix_ppc.hpp	Thu May 17 14:16:49 2018 +0200
@@ -48,4 +48,7 @@
   bool pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext,
                                            bool isInJava);
 
+  bool pd_get_top_frame_for_profiling(frame* fr_addr, void* ucontext,
+                                      bool isInJava);
+
 #endif // OS_CPU_AIX_PPC_VM_THREAD_AIX_PPC_HPP
--- a/src/hotspot/os_cpu/linux_ppc/thread_linux_ppc.cpp	Thu May 17 11:03:19 2018 +0000
+++ b/src/hotspot/os_cpu/linux_ppc/thread_linux_ppc.cpp	Thu May 17 14:16:49 2018 +0200
@@ -41,6 +41,13 @@
   return frame(sp, pc);
 }
 
+bool JavaThread::pd_get_top_frame_for_profiling(frame* fr_addr, void* ucontext, bool isInJava) {
+  ucontext_t* uc = (ucontext_t*) ucontext;
+  *fr_addr = frame((intptr_t*)uc->uc_mcontext.regs->gpr[1/*REG_SP*/],
+                   (address)uc->uc_mcontext.regs->nip);
+  return true;
+}
+
 // Forte Analyzer AsyncGetCallTrace profiling support is not implemented on Linux/PPC.
 bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext, bool isInJava) {
   Unimplemented();
--- a/src/hotspot/os_cpu/linux_ppc/thread_linux_ppc.hpp	Thu May 17 11:03:19 2018 +0000
+++ b/src/hotspot/os_cpu/linux_ppc/thread_linux_ppc.hpp	Thu May 17 14:16:49 2018 +0200
@@ -49,4 +49,6 @@
 
   bool pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext, bool isInJava);
 
+  bool pd_get_top_frame_for_profiling(frame* fr_addr, void* ucontext, bool isInJava);
+
 #endif // OS_CPU_LINUX_PPC_VM_THREAD_LINUX_PPC_HPP
--- a/src/hotspot/os_cpu/linux_s390/thread_linux_s390.cpp	Thu May 17 11:03:19 2018 +0000
+++ b/src/hotspot/os_cpu/linux_s390/thread_linux_s390.cpp	Thu May 17 14:16:49 2018 +0200
@@ -41,6 +41,13 @@
   return frame(sp, pc);
 }
 
+bool JavaThread::pd_get_top_frame_for_profiling(frame* fr_addr, void* ucontext, bool isInJava) {
+  ucontext_t* uc = (ucontext_t*) ucontext;
+  *fr_addr = frame((intptr_t*)uc->uc_mcontext.gregs[15/*REG_SP*/],
+                   (address)uc->uc_mcontext.psw.addr);
+  return true;
+}
+
 // Forte Analyzer AsyncGetCallTrace profiling support is not implemented on Linux/S390x.
 bool JavaThread::pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext, bool isInJava) {
   Unimplemented();
--- a/src/hotspot/os_cpu/linux_s390/thread_linux_s390.hpp	Thu May 17 11:03:19 2018 +0000
+++ b/src/hotspot/os_cpu/linux_s390/thread_linux_s390.hpp	Thu May 17 14:16:49 2018 +0200
@@ -48,4 +48,6 @@
 
   bool pd_get_top_frame_for_signal_handler(frame* fr_addr, void* ucontext, bool isInJava);
 
+  bool pd_get_top_frame_for_profiling(frame* fr_addr, void* ucontext, bool isInJava);
+
 #endif // OS_CPU_LINUX_S390_VM_THREAD_LINUX_S390_HPP
--- a/src/hotspot/share/jfr/utilities/jfrBigEndian.hpp	Thu May 17 11:03:19 2018 +0000
+++ b/src/hotspot/share/jfr/utilities/jfrBigEndian.hpp	Thu May 17 14:16:49 2018 +0200
@@ -100,7 +100,7 @@
 }
 
 inline bool JfrBigEndian::platform_supports_unaligned_reads(void) {
-#if defined(IA32) || defined(AMD64)
+#if defined(IA32) || defined(AMD64) || defined(PPC) || defined(S390)
   return true;
 #elif defined(SPARC) || defined(ARM) || defined(AARCH64)
   return false;