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 
  32 // Check core dump limit and report possible place where core can be found
  33 void os::check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize) {
  34   struct rlimit rlim;
  35   static char cwd[O_BUFLEN];
  36   bool success;
  37 
  38   get_current_directory(cwd, sizeof(cwd));
  39 
  40   if (getrlimit(RLIMIT_CORE, &rlim) != 0) {
  41     jio_snprintf(buffer, bufferSize, "%s/core or core.%d (may not exist)", cwd, current_process_id());
  42     success = true;
  43   } else {
  44     switch(rlim.rlim_cur) {
  45       case RLIM_INFINITY:
  46         jio_snprintf(buffer, bufferSize, "%s/core or core.%d", cwd, current_process_id());
  47         success = true;
  48         break;
  49       case 0:
  50         jio_snprintf(buffer, bufferSize, "Core dumps have been disabled. To enable core dumping, try \"ulimit -c unlimited\" before starting Java again");
  51         success = false;
  52         break;
  53       default:
  54         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));
  55         success = true;
  56         break;
  57     }
  58   }
  59   VMError::report_coredump_status(buffer, success);
  60 }
  61 
  62 bool os::is_debugger_present() {
  63   // not implemented
  64   return false;
  65 }
  66 
  67 void os::check_for_debugger_and_wait(void) {
  68   // don't do anything on posix platforms
  69   return;
  70 }