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src/os_cpu/linux_sparc/vm/vm_version_linux_sparc.cpp

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rev 5451 : 8062672: JVM crashes during GC on various asserts which checks that HeapWord ptr is an oop
Summary: Crashes were caused by not disabling UseMemSetInBOT as should be done on sparc. Added support for picking up blkinit as a platform feature if available on Linux sparc. This is needed to avoid enabling UseMemSetInBOT when running on this platform.
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   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 "precompiled.hpp"
  26 #include "runtime/os.hpp"
  27 #include "vm_version_sparc.hpp"
  28 
  29 static bool detect_niagara() {
  30   char cpu[128];
  31   bool rv = false;
  32 
  33   FILE* fp = fopen("/proc/cpuinfo", "r");
  34   if (fp == NULL) {
  35     return rv;
  36   }
  37 
  38   while (!feof(fp)) {
  39     if (fscanf(fp, "cpu\t\t: %100[^\n]", &cpu) == 1) {
  40       if (strstr(cpu, "Niagara") != NULL) {
  41         rv = true;
  42       }
  43       break;
  44     }
  45   }
  46 
  47   fclose(fp);
  48 
  49   return rv;
  50 }
  51 








  52 int VM_Version::platform_features(int features) {
  53   // Default to generic v9
  54   features = generic_v9_m;
  55 
  56   if (detect_niagara()) {
  57     NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Detected Linux on Niagara");)
  58     features = niagara1_m | T_family_m;




  59   }
  60 
  61   return features;
  62 }


   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 "precompiled.hpp"
  26 #include "runtime/os.hpp"
  27 #include "vm_version_sparc.hpp"
  28 
  29 static bool cpuinfo_field_contains(const char* field, const char* value) {
  30   char line[1024];
  31   bool rv = false;
  32 
  33   FILE* fp = fopen("/proc/cpuinfo", "r");
  34   if (fp == NULL) {
  35     return rv;
  36   }
  37 
  38   while (fgets(line, sizeof(line), fp)) {
  39     if (strncmp(line, field, strlen(field)) == 0) {
  40       if (strstr(line, value) != NULL) {
  41         rv = true;
  42       }
  43       break;
  44     }
  45   }
  46 
  47   fclose(fp);

  48   return rv;
  49 }
  50 
  51 static bool detect_niagara() {
  52   return cpuinfo_field_contains("cpu", "Niagara");
  53 }
  54 
  55 static bool detect_blkinit() {
  56   return cpuinfo_field_contains("cpucaps", "blkinit");
  57 }
  58 
  59 int VM_Version::platform_features(int features) {
  60   // Default to generic v9
  61   features = generic_v9_m;
  62 
  63   if (detect_niagara()) {
  64     NOT_PRODUCT(if (PrintMiscellaneous && Verbose) tty->print_cr("Detected Linux on Niagara");)
  65     features = niagara1_m | T_family_m;
  66   }
  67 
  68   if (detect_blkinit()) {
  69     features |= blk_init_instructions_m;
  70   }
  71 
  72   return features;
  73 }
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