os_posix.cpp revision 3718:b9a9ed0f8eeb 
1/*
2* Copyright (c) 1999, 2012, 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/frame.inline.hpp"
27#include "runtime/os.hpp"
28#include "utilities/vmError.hpp"
29
30#include <unistd.h>
31#include <sys/resource.h>
32#include <sys/utsname.h>
33
34
35// Check core dump limit and report possible place where core can be found
36void os::check_or_create_dump(void* exceptionRecord, void* contextRecord, char* buffer, size_t bufferSize) {
37  int n;
38  struct rlimit rlim;
39  bool success;
40
41  n = get_core_path(buffer, bufferSize);
42
43  if (getrlimit(RLIMIT_CORE, &rlim) != 0) {
44    jio_snprintf(buffer + n, bufferSize - n, "/core or core.%d (may not exist)", current_process_id());
45    success = true;
46  } else {
47    switch(rlim.rlim_cur) {
48      case RLIM_INFINITY:
49        jio_snprintf(buffer + n, bufferSize - n, "/core or core.%d", current_process_id());
50        success = true;
51        break;
52      case 0:
53        jio_snprintf(buffer, bufferSize, "Core dumps have been disabled. To enable core dumping, try \"ulimit -c unlimited\" before starting Java again");
54        success = false;
55        break;
56      default:
57        jio_snprintf(buffer + n, bufferSize - n, "/core or core.%d (max size %lu kB). To ensure a full core dump, try \"ulimit -c unlimited\" before starting Java again", current_process_id(), (unsigned long)(rlim.rlim_cur >> 10));
58        success = true;
59        break;
60    }
61  }
62  VMError::report_coredump_status(buffer, success);
63}
64
65address os::get_caller_pc(int n) {
66#ifdef _NMT_NOINLINE_
67  n ++;
68#endif
69  frame fr = os::current_frame();
70  while (n > 0 && fr.pc() &&
71    !os::is_first_C_frame(&fr) && fr.sender_pc()) {
72    fr = os::get_sender_for_C_frame(&fr);
73    n --;
74  }
75  if (n == 0) {
76    return fr.pc();
77  } else {
78    return NULL;
79  }
80}
81
82int os::get_last_error() {
83  return errno;
84}
85
86bool os::is_debugger_attached() {
87  // not implemented
88  return false;
89}
90
91void os::wait_for_keypress_at_exit(void) {
92  // don't do anything on posix platforms
93  return;
94}
95
96void os::Posix::print_load_average(outputStream* st) {
97  st->print("load average:");
98  double loadavg[3];
99  os::loadavg(loadavg, 3);
100  st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]);
101  st->cr();
102}
103
104void os::Posix::print_rlimit_info(outputStream* st) {
105  st->print("rlimit:");
106  struct rlimit rlim;
107
108  st->print(" STACK ");
109  getrlimit(RLIMIT_STACK, &rlim);
110  if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
111  else st->print("%uk", rlim.rlim_cur >> 10);
112
113  st->print(", CORE ");
114  getrlimit(RLIMIT_CORE, &rlim);
115  if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
116  else st->print("%uk", rlim.rlim_cur >> 10);
117
118  //Isn't there on solaris
119#ifndef TARGET_OS_FAMILY_solaris
120  st->print(", NPROC ");
121  getrlimit(RLIMIT_NPROC, &rlim);
122  if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
123  else st->print("%d", rlim.rlim_cur);
124#endif
125
126  st->print(", NOFILE ");
127  getrlimit(RLIMIT_NOFILE, &rlim);
128  if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
129  else st->print("%d", rlim.rlim_cur);
130
131  st->print(", AS ");
132  getrlimit(RLIMIT_AS, &rlim);
133  if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity");
134  else st->print("%uk", rlim.rlim_cur >> 10);
135  st->cr();
136}
137
138void os::Posix::print_uname_info(outputStream* st) {
139  // kernel
140  st->print("uname:");
141  struct utsname name;
142  uname(&name);
143  st->print(name.sysname); st->print(" ");
144  st->print(name.release); st->print(" ");
145  st->print(name.version); st->print(" ");
146  st->print(name.machine);
147  st->cr();
148}
149
150
151