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 36 void 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 65 address 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 82 int os::get_last_error() { 83 return errno; 84 } 85 86 bool os::is_debugger_attached() { 87 // not implemented 88 return false; 89 } 90 91 void os::wait_for_keypress_at_exit(void) { 92 // don't do anything on posix platforms 93 return; 94 } 95 96 char* os::reserve_memory_aligned(size_t size, size_t alignment) { 97 assert(alignment & (os::vm_allocation_granularity() - 1) == 0, 98 "Alignment must be a multiple of allocation granularity (page size)"); 99 assert(size & (alignment -1) == 0, "size must be 'alignment' aligned"); 100 size_t extra_size = size + alignment; 101 char* extra_base = os::reserve_memory(extra_size, NULL, alignment); 102 103 if (extra_base == NULL) { 104 return NULL; 105 } 106 107 // Do manual alignment 108 char* aligned_base = (char*) align_size_up((uintptr_t) extra_base, alignment); 109 110 // [ | | ] 111 // ^ extra_base 112 // ^ extra_base + begin_offset == aligned_base 113 // extra_base + begin_offset + size ^ 114 // extra_base + extra_size ^ 115 // |<>| == begin_offset 116 // end_offset == |<>| 117 size_t begin_offset = aligned_base - extra_base; 118 size_t end_offset = (extra_base + extra_size) - (aligned_base + size); 119 120 if (begin_offset > 0) { 121 os::release_memory(extra_base, begin_offset); 122 } 123 124 if (end_offset > 0) { 125 os::release_memory(extra_base + begin_offset + size, end_offset); 126 } 127 128 return aligned_base; 129 } 130 131 void os::Posix::print_load_average(outputStream* st) { 132 st->print("load average:"); 133 double loadavg[3]; 134 os::loadavg(loadavg, 3); 135 st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]); 136 st->cr(); 137 } 138 139 void os::Posix::print_rlimit_info(outputStream* st) { 140 st->print("rlimit:"); 141 struct rlimit rlim; 142 143 st->print(" STACK "); 144 getrlimit(RLIMIT_STACK, &rlim); 145 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 146 else st->print("%uk", rlim.rlim_cur >> 10); 147 148 st->print(", CORE "); 149 getrlimit(RLIMIT_CORE, &rlim); 150 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 151 else st->print("%uk", rlim.rlim_cur >> 10); 152 153 //Isn't there on solaris 154 #ifndef TARGET_OS_FAMILY_solaris 155 st->print(", NPROC "); 156 getrlimit(RLIMIT_NPROC, &rlim); 157 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 158 else st->print("%d", rlim.rlim_cur); 159 #endif 160 161 st->print(", NOFILE "); 162 getrlimit(RLIMIT_NOFILE, &rlim); 163 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 164 else st->print("%d", rlim.rlim_cur); 165 166 st->print(", AS "); 167 getrlimit(RLIMIT_AS, &rlim); 168 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); 169 else st->print("%uk", rlim.rlim_cur >> 10); 170 st->cr(); 171 } 172 173 void os::Posix::print_uname_info(outputStream* st) { 174 // kernel 175 st->print("uname:"); 176 struct utsname name; 177 uname(&name); 178 st->print(name.sysname); st->print(" "); 179 st->print(name.release); st->print(" "); 180 st->print(name.version); st->print(" "); 181 st->print(name.machine); 182 st->cr(); 183 } 184 185