src/hotspot/os_cpu/linux_sparc/vm_version_linux_sparc.cpp
changeset 47216 71c04702a3d5
parent 46666 32434b633549
child 47772 71ad0eec75e8
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/os_cpu/linux_sparc/vm_version_linux_sparc.cpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,84 @@
+/*
+ * Copyright (c) 2006, 2016, 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 "logging/log.hpp"
+#include "precompiled.hpp"
+#include "runtime/os.hpp"
+#include "vm_version_sparc.hpp"
+
+static bool cpuinfo_field_contains(const char* field, const char* value) {
+  char line[1024];
+  bool rv = false;
+
+  FILE* fp = fopen("/proc/cpuinfo", "r");
+  if (fp == NULL) {
+    return rv;
+  }
+
+  while (fgets(line, sizeof(line), fp) != NULL) {
+    assert(strlen(line) < sizeof(line) - 1, "buffer line[1024] is too small.");
+    if (strncmp(line, field, strlen(field)) == 0) {
+      if (strstr(line, value) != NULL) {
+        rv = true;
+      }
+      break;
+    }
+  }
+
+  fclose(fp);
+  return rv;
+}
+
+static bool detect_niagara() {
+  return cpuinfo_field_contains("cpu", "Niagara");
+}
+
+static bool detect_M_family() {
+  return cpuinfo_field_contains("cpu", "SPARC-M");
+}
+
+static bool detect_blkinit() {
+  return cpuinfo_field_contains("cpucaps", "blkinit");
+}
+
+int VM_Version::platform_features(int features) {
+  // Default to generic v9
+  features = generic_v9_m;
+
+  if (detect_niagara()) {
+    log_info(os, cpu)("Detected Linux on Niagara");
+    features = niagara1_m | T_family_m;
+  }
+
+  if (detect_M_family()) {
+    log_info(os, cpu)("Detected Linux on M family");
+    features = sun4v_m | generic_v9_m | M_family_m | T_family_m;
+  }
+
+  if (detect_blkinit()) {
+    features |= blk_init_instructions_m;
+  }
+
+  return features;
+}