1 /*
   2 * Copyright (c) 1999, 2011, 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 "prims/jvm.h"
  26 #include "runtime/os.hpp"
  27 #include "utilities/vmError.hpp"
  28 
  29 #include <unistd.h>
  30 #include <sys/resource.h>
  31 #include <sys/utsname.h>
  32 
  33 
  34 // Check core dump limit and report possible place where core can be found
  35 void os::check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize) {
  36   struct rlimit rlim;
  37   static char cwd[O_BUFLEN];
  38   bool success;
  39 
  40   get_current_directory(cwd, sizeof(cwd));
  41 
  42   if (getrlimit(RLIMIT_CORE, &rlim) != 0) {
  43     jio_snprintf(buffer, bufferSize, "%s/core or core.%d (may not exist)", cwd, current_process_id());
  44     success = true;
  45   } else {
  46     switch(rlim.rlim_cur) {
  47       case RLIM_INFINITY:
  48         jio_snprintf(buffer, bufferSize, "%s/core or core.%d", cwd, current_process_id());
  49         success = true;
  50         break;
  51       case 0:
  52         jio_snprintf(buffer, bufferSize, "Core dumps have been disabled. To enable core dumping, try \"ulimit -c unlimited\" before starting Java again");
  53         success = false;
  54         break;
  55       default:
  56         jio_snprintf(buffer, bufferSize, "%s/core or core.%d (max size %lu kB). To ensure a full core dump, try \"ulimit -c unlimited\" before starting Java again", cwd, current_process_id(), (unsigned long)(rlim.rlim_cur >> 10));
  57         success = true;
  58         break;
  59     }
  60   }
  61   VMError::report_coredump_status(buffer, success);
  62 }
  63 
  64 int os::get_last_error() {
  65   return errno;
  66 }
  67 
  68 bool os::is_debugger_attached() {
  69   // not implemented
  70   return false;
  71 }
  72 
  73 void os::wait_for_keypress_at_exit(void) {
  74   // don't do anything on posix platforms
  75   return;
  76 }
  77 
  78 void os::Posix::print_load_average(outputStream* st) {
  79   st->print("load average:");
  80   double loadavg[3];
  81   os::loadavg(loadavg, 3);
  82   st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]);
  83   st->cr();
  84 }
  85 
  86 void os::Posix::print_rlimit_info(outputStream* st) {
  87   st->print("rlimit:");
  88   struct rlimit rlim;
  89 
  90   st->print(" STACK ");
  91   getrlimit(RLIMIT_STACK, &rlim);
  92   if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
  93   else st->print("%uk", rlim.rlim_cur >> 10);
  94 
  95   st->print(", CORE ");
  96   getrlimit(RLIMIT_CORE, &rlim);
  97   if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
  98   else st->print("%uk", rlim.rlim_cur >> 10);
  99 
 100   //Isn't there on solaris
 101 #ifndef TARGET_OS_FAMILY_solaris
 102   st->print(", NPROC ");
 103   getrlimit(RLIMIT_NPROC, &rlim);
 104   if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
 105   else st->print("%d", rlim.rlim_cur);
 106 #endif
 107 
 108   st->print(", NOFILE ");
 109   getrlimit(RLIMIT_NOFILE, &rlim);
 110   if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
 111   else st->print("%d", rlim.rlim_cur);
 112 
 113   st->print(", AS ");
 114   getrlimit(RLIMIT_AS, &rlim);
 115   if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
 116   else st->print("%uk", rlim.rlim_cur >> 10);
 117   st->cr();
 118 }
 119 
 120 void os::Posix::print_uname_info(outputStream* st) {
 121   // kernel
 122   st->print("uname:");
 123   struct utsname name;
 124   uname(&name);
 125   st->print(name.sysname); st->print(" ");
 126   st->print(name.release); st->print(" ");
 127   st->print(name.version); st->print(" ");
 128   st->print(name.machine);
 129   st->cr();
 130 }
 131 
 132