Mercurial > hg > truffle
annotate src/os/posix/vm/os_posix.cpp @ 7433:730cc4ddd550
7173959: Jvm crashed during coherence exabus (tmb) testing
Summary: Mapping of aligned memory needs to be MT safe. Also reviewed by: vitalyd@gmail.com
Reviewed-by: dholmes, coleenp, zgu
author | brutisso |
---|---|
date | Mon, 17 Dec 2012 08:49:20 +0100 |
parents | b9a9ed0f8eeb |
children | 754c24457b20 |
rev | line source |
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2204 | 1 /* |
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2 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved. |
2204 | 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" | |
6197 | 26 #include "runtime/frame.inline.hpp" |
2204 | 27 #include "runtime/os.hpp" |
28 #include "utilities/vmError.hpp" | |
29 | |
30 #include <unistd.h> | |
31 #include <sys/resource.h> | |
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32 #include <sys/utsname.h> |
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33 |
2204 | 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) { | |
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37 int n; |
2204 | 38 struct rlimit rlim; |
39 bool success; | |
40 | |
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41 n = get_core_path(buffer, bufferSize); |
2204 | 42 |
43 if (getrlimit(RLIMIT_CORE, &rlim) != 0) { | |
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44 jio_snprintf(buffer + n, bufferSize - n, "/core or core.%d (may not exist)", current_process_id()); |
2204 | 45 success = true; |
46 } else { | |
47 switch(rlim.rlim_cur) { | |
48 case RLIM_INFINITY: | |
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49 jio_snprintf(buffer + n, bufferSize - n, "/core or core.%d", current_process_id()); |
2204 | 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: | |
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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)); |
2204 | 58 success = true; |
59 break; | |
60 } | |
61 } | |
62 VMError::report_coredump_status(buffer, success); | |
63 } | |
64 | |
6197 | 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 | |
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82 int os::get_last_error() { |
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83 return errno; |
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84 } |
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85 |
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86 bool os::is_debugger_attached() { |
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87 // not implemented |
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88 return false; |
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89 } |
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90 |
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91 void os::wait_for_keypress_at_exit(void) { |
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92 // don't do anything on posix platforms |
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93 return; |
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94 } |
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95 |
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96 // Multiple threads can race in this code, and can remap over each other with MAP_FIXED, |
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97 // so on posix, unmap the section at the start and at the end of the chunk that we mapped |
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98 // rather than unmapping and remapping the whole chunk to get requested alignment. |
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99 char* os::reserve_memory_aligned(size_t size, size_t alignment) { |
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100 assert((alignment & (os::vm_allocation_granularity() - 1)) == 0, |
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101 "Alignment must be a multiple of allocation granularity (page size)"); |
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102 assert((size & (alignment -1)) == 0, "size must be 'alignment' aligned"); |
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103 |
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104 size_t extra_size = size + alignment; |
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105 assert(extra_size >= size, "overflow, size is too large to allow alignment"); |
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106 |
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107 char* extra_base = os::reserve_memory(extra_size, NULL, alignment); |
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108 |
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109 if (extra_base == NULL) { |
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110 return NULL; |
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111 } |
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112 |
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113 // Do manual alignment |
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114 char* aligned_base = (char*) align_size_up((uintptr_t) extra_base, alignment); |
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115 |
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116 // [ | | ] |
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117 // ^ extra_base |
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118 // ^ extra_base + begin_offset == aligned_base |
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119 // extra_base + begin_offset + size ^ |
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120 // extra_base + extra_size ^ |
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121 // |<>| == begin_offset |
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122 // end_offset == |<>| |
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123 size_t begin_offset = aligned_base - extra_base; |
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124 size_t end_offset = (extra_base + extra_size) - (aligned_base + size); |
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125 |
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126 if (begin_offset > 0) { |
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127 os::release_memory(extra_base, begin_offset); |
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128 } |
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129 |
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130 if (end_offset > 0) { |
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131 os::release_memory(extra_base + begin_offset + size, end_offset); |
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132 } |
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133 |
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134 return aligned_base; |
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135 } |
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136 |
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137 void os::Posix::print_load_average(outputStream* st) { |
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138 st->print("load average:"); |
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139 double loadavg[3]; |
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140 os::loadavg(loadavg, 3); |
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141 st->print("%0.02f %0.02f %0.02f", loadavg[0], loadavg[1], loadavg[2]); |
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142 st->cr(); |
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143 } |
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144 |
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145 void os::Posix::print_rlimit_info(outputStream* st) { |
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146 st->print("rlimit:"); |
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147 struct rlimit rlim; |
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148 |
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149 st->print(" STACK "); |
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150 getrlimit(RLIMIT_STACK, &rlim); |
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151 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); |
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152 else st->print("%uk", rlim.rlim_cur >> 10); |
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153 |
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154 st->print(", CORE "); |
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155 getrlimit(RLIMIT_CORE, &rlim); |
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156 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); |
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157 else st->print("%uk", rlim.rlim_cur >> 10); |
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158 |
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159 //Isn't there on solaris |
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160 #ifndef TARGET_OS_FAMILY_solaris |
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161 st->print(", NPROC "); |
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162 getrlimit(RLIMIT_NPROC, &rlim); |
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163 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); |
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164 else st->print("%d", rlim.rlim_cur); |
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165 #endif |
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166 |
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167 st->print(", NOFILE "); |
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168 getrlimit(RLIMIT_NOFILE, &rlim); |
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169 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); |
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170 else st->print("%d", rlim.rlim_cur); |
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171 |
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172 st->print(", AS "); |
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173 getrlimit(RLIMIT_AS, &rlim); |
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174 if (rlim.rlim_cur == RLIM_INFINITY) st->print("infinity"); |
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175 else st->print("%uk", rlim.rlim_cur >> 10); |
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176 st->cr(); |
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177 } |
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178 |
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179 void os::Posix::print_uname_info(outputStream* st) { |
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180 // kernel |
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181 st->print("uname:"); |
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182 struct utsname name; |
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183 uname(&name); |
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184 st->print(name.sysname); st->print(" "); |
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185 st->print(name.release); st->print(" "); |
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186 st->print(name.version); st->print(" "); |
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187 st->print(name.machine); |
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188 st->cr(); |
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189 } |
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190 |
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191 |