--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/os/aix/vm/libperfstat_aix.cpp	Fri Sep 06 20:16:09 2013 +0200
@@ -0,0 +1,124 @@
+/*
+ * Copyright 2012, 2013 SAP AG. 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 "runtime/arguments.hpp"
+#include "libperfstat_aix.hpp"
+
+// For dlopen and friends
+#include <fcntl.h>
+
+// handle to the libperfstat
+static void* g_libhandle = NULL;
+
+// whether initialization worked
+static bool g_initialized = false;
+
+
+typedef int (*fun_perfstat_cpu_total_t) (perfstat_id_t *name, perfstat_cpu_total_t* userbuff,
+                                         int sizeof_userbuff, int desired_number);
+
+typedef int (*fun_perfstat_memory_total_t) (perfstat_id_t *name, perfstat_memory_total_t* userbuff,
+                                            int sizeof_userbuff, int desired_number);
+
+typedef void (*fun_perfstat_reset_t) ();
+
+static fun_perfstat_cpu_total_t     g_fun_perfstat_cpu_total = NULL;
+static fun_perfstat_memory_total_t  g_fun_perfstat_memory_total = NULL;
+static fun_perfstat_reset_t         g_fun_perfstat_reset = NULL;
+
+bool libperfstat::init() {
+
+  if (g_initialized) {
+    return true;
+  }
+
+  g_initialized = false;
+
+  // dynamically load the libperfstat porting library.
+  g_libhandle = dlopen("/usr/lib/libperfstat.a(shr_64.o)", RTLD_MEMBER | RTLD_NOW);
+  if (!g_libhandle) {
+    if (Verbose) {
+      fprintf(stderr, "Cannot load libperfstat.a (dlerror: %s)", dlerror());
+    }
+    return false;
+  }
+
+  // resolve function pointers
+
+#define RESOLVE_FUN_NO_ERROR(name) \
+  g_fun_##name = (fun_##name##_t) dlsym(g_libhandle, #name);
+
+#define RESOLVE_FUN(name) \
+  RESOLVE_FUN_NO_ERROR(name) \
+  if (!g_fun_##name) { \
+    if (Verbose) { \
+      fprintf(stderr, "Cannot resolve " #name "() from libperfstat.a\n" \
+                      "   (dlerror: %s)", dlerror()); \
+      } \
+    return false; \
+  }
+
+  RESOLVE_FUN(perfstat_cpu_total);
+  RESOLVE_FUN(perfstat_memory_total);
+  RESOLVE_FUN(perfstat_reset);
+
+  g_initialized = true;
+
+  return true;
+}
+
+void libperfstat::cleanup() {
+
+  g_initialized = false;
+
+  if (g_libhandle) {
+    dlclose(g_libhandle);
+    g_libhandle = NULL;
+  }
+
+  g_fun_perfstat_cpu_total = NULL;
+  g_fun_perfstat_memory_total = NULL;
+  g_fun_perfstat_reset = NULL;
+}
+
+int libperfstat::perfstat_memory_total(perfstat_id_t *name,
+                                       perfstat_memory_total_t* userbuff,
+                                       int sizeof_userbuff, int desired_number) {
+  assert(g_initialized, "libperfstat not initialized");
+  assert(g_fun_perfstat_memory_total, "");
+  return g_fun_perfstat_memory_total(name, userbuff, sizeof_userbuff, desired_number);
+}
+
+int libperfstat::perfstat_cpu_total(perfstat_id_t *name, perfstat_cpu_total_t* userbuff,
+                                    int sizeof_userbuff, int desired_number) {
+  assert(g_initialized, "libperfstat not initialized");
+  assert(g_fun_perfstat_cpu_total, "");
+  return g_fun_perfstat_cpu_total(name, userbuff, sizeof_userbuff, desired_number);
+}
+
+void libperfstat::perfstat_reset() {
+  assert(g_initialized, "libperfstat not initialized");
+  assert(g_fun_perfstat_reset, "");
+  g_fun_perfstat_reset();
+}