1 /*
   2  * Copyright (c) 2013, 2015, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #include "memory/allocation.hpp"
  26 #include "memory/allocation.inline.hpp"
  27 #include "runtime/os.inline.hpp"
  28 #include "vm_version_ext_arm.hpp"
  29 
  30 // VM_Version_Ext statics
  31 int VM_Version_Ext::_no_of_threads = 0;
  32 int VM_Version_Ext::_no_of_cores = 0;
  33 int VM_Version_Ext::_no_of_sockets = 0;
  34 bool VM_Version_Ext::_initialized = false;
  35 char VM_Version_Ext::_cpu_name[CPU_TYPE_DESC_BUF_SIZE] = {0};
  36 char VM_Version_Ext::_cpu_desc[CPU_DETAILED_DESC_BUF_SIZE] = {0};
  37 
  38 void VM_Version_Ext::initialize_cpu_information(void) {
  39   // do nothing if cpu info has been initialized
  40   if (_initialized) {
  41     return;
  42   }
  43 
  44   int core_id = -1;
  45   int chip_id = -1;
  46   int len = 0;
  47   char* src_string = NULL;
  48 
  49   _no_of_cores  = os::processor_count();
  50   _no_of_threads = _no_of_cores;
  51   _no_of_sockets = _no_of_cores;
  52 #ifdef AARCH64
  53   snprintf(_cpu_name, CPU_TYPE_DESC_BUF_SIZE - 1, "AArch64");
  54 #else
  55   snprintf(_cpu_name, CPU_TYPE_DESC_BUF_SIZE - 1, "ARM%d", _arm_arch);
  56 #endif
  57   snprintf(_cpu_desc, CPU_DETAILED_DESC_BUF_SIZE, "%s", _features_string);
  58   _initialized = true;
  59 }
  60 
  61 int VM_Version_Ext::number_of_threads(void) {
  62   initialize_cpu_information();
  63   return _no_of_threads;
  64 }
  65 
  66 int VM_Version_Ext::number_of_cores(void) {
  67   initialize_cpu_information();
  68   return _no_of_cores;
  69 }
  70 
  71 int VM_Version_Ext::number_of_sockets(void) {
  72   initialize_cpu_information();
  73   return _no_of_sockets;
  74 }
  75 
  76 const char* VM_Version_Ext::cpu_name(void) {
  77   initialize_cpu_information();
  78   char* tmp = NEW_C_HEAP_ARRAY_RETURN_NULL(char, CPU_TYPE_DESC_BUF_SIZE, mtTracing);
  79   if (NULL == tmp) {
  80     return NULL;
  81   }
  82   strncpy(tmp, _cpu_name, CPU_TYPE_DESC_BUF_SIZE);
  83   return tmp;
  84 }
  85 
  86 const char* VM_Version_Ext::cpu_description(void) {
  87   initialize_cpu_information();
  88   char* tmp = NEW_C_HEAP_ARRAY_RETURN_NULL(char, CPU_DETAILED_DESC_BUF_SIZE, mtTracing);
  89   if (NULL == tmp) {
  90     return NULL;
  91   }
  92   strncpy(tmp, _cpu_desc, CPU_DETAILED_DESC_BUF_SIZE);
  93   return tmp;
  94 }