annotate src/os/aix/vm/perfMemory_aix.cpp @ 23455:9f8038f83a6e

8130910: hsperfdata file is created in wrong directory and not cleaned up if /tmp/hsperfdata_<username> has wrong permissions Summary: Add check for fchir() failure and disable shared PerfMemory in that case. Reviewed-by: dcubed, simonis, gthornbr
author clanger
date Tue, 17 Nov 2015 09:39:45 -0800
parents b9c06f87e476
children 2d23269a45a0
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1 /*
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2 * Copyright (c) 2001, 2015, Oracle and/or its affiliates. All rights reserved.
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3 * Copyright 2012, 2013 SAP AG. All rights reserved.
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4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 *
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6 * This code is free software; you can redistribute it and/or modify it
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7 * under the terms of the GNU General Public License version 2 only, as
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8 * published by the Free Software Foundation.
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9 *
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10 * This code is distributed in the hope that it will be useful, but WITHOUT
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11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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13 * version 2 for more details (a copy is included in the LICENSE file that
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14 * accompanied this code).
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15 *
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16 * You should have received a copy of the GNU General Public License version
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17 * 2 along with this work; if not, write to the Free Software Foundation,
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18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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19 *
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20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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21 * or visit www.oracle.com if you need additional information or have any
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22 * questions.
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23 *
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24 */
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25
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26 #include "precompiled.hpp"
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27 #include "classfile/vmSymbols.hpp"
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28 #include "memory/allocation.inline.hpp"
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29 #include "memory/resourceArea.hpp"
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30 #include "oops/oop.inline.hpp"
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31 #include "os_aix.inline.hpp"
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32 #include "runtime/handles.inline.hpp"
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33 #include "runtime/perfMemory.hpp"
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34 #include "services/memTracker.hpp"
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35 #include "utilities/exceptions.hpp"
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36
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37 // put OS-includes here
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38 # include <sys/types.h>
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39 # include <sys/mman.h>
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40 # include <errno.h>
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41 # include <stdio.h>
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42 # include <unistd.h>
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43 # include <sys/stat.h>
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44 # include <signal.h>
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45 # include <pwd.h>
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46
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47 static char* backing_store_file_name = NULL; // name of the backing store
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48 // file, if successfully created.
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49
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50 // Standard Memory Implementation Details
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51
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52 // create the PerfData memory region in standard memory.
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53 //
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54 static char* create_standard_memory(size_t size) {
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55
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56 // allocate an aligned chuck of memory
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57 char* mapAddress = os::reserve_memory(size);
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58
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59 if (mapAddress == NULL) {
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60 return NULL;
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61 }
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62
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63 // commit memory
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64 if (!os::commit_memory(mapAddress, size, !ExecMem)) {
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65 if (PrintMiscellaneous && Verbose) {
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66 warning("Could not commit PerfData memory\n");
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67 }
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68 os::release_memory(mapAddress, size);
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69 return NULL;
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70 }
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71
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72 return mapAddress;
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73 }
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74
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75 // delete the PerfData memory region
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76 //
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77 static void delete_standard_memory(char* addr, size_t size) {
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78
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79 // there are no persistent external resources to cleanup for standard
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80 // memory. since DestroyJavaVM does not support unloading of the JVM,
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81 // cleanup of the memory resource is not performed. The memory will be
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82 // reclaimed by the OS upon termination of the process.
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83 //
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84 return;
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85 }
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86
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87 // save the specified memory region to the given file
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88 //
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89 // Note: this function might be called from signal handler (by os::abort()),
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90 // don't allocate heap memory.
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91 //
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92 static void save_memory_to_file(char* addr, size_t size) {
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93
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94 const char* destfile = PerfMemory::get_perfdata_file_path();
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95 assert(destfile[0] != '\0', "invalid PerfData file path");
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96
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97 int result;
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98
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99 RESTARTABLE(::open(destfile, O_CREAT|O_WRONLY|O_TRUNC, S_IREAD|S_IWRITE),
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100 result);;
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101 if (result == OS_ERR) {
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102 if (PrintMiscellaneous && Verbose) {
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103 warning("Could not create Perfdata save file: %s: %s\n",
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104 destfile, strerror(errno));
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105 }
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106 } else {
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107 int fd = result;
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108
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109 for (size_t remaining = size; remaining > 0;) {
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110
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111 RESTARTABLE(::write(fd, addr, remaining), result);
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112 if (result == OS_ERR) {
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113 if (PrintMiscellaneous && Verbose) {
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114 warning("Could not write Perfdata save file: %s: %s\n",
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115 destfile, strerror(errno));
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116 }
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117 break;
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118 }
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119
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120 remaining -= (size_t)result;
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121 addr += result;
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122 }
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123
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124 RESTARTABLE(::close(fd), result);
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125 if (PrintMiscellaneous && Verbose) {
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126 if (result == OS_ERR) {
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127 warning("Could not close %s: %s\n", destfile, strerror(errno));
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128 }
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129 }
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130 }
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131 FREE_C_HEAP_ARRAY(char, destfile, mtInternal);
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132 }
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133
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134
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135 // Shared Memory Implementation Details
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136
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137 // Note: the solaris and linux shared memory implementation uses the mmap
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138 // interface with a backing store file to implement named shared memory.
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139 // Using the file system as the name space for shared memory allows a
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140 // common name space to be supported across a variety of platforms. It
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141 // also provides a name space that Java applications can deal with through
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142 // simple file apis.
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143 //
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144 // The solaris and linux implementations store the backing store file in
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145 // a user specific temporary directory located in the /tmp file system,
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146 // which is always a local file system and is sometimes a RAM based file
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147 // system.
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148
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149 // return the user specific temporary directory name.
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150 //
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151 // the caller is expected to free the allocated memory.
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152 //
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153 static char* get_user_tmp_dir(const char* user) {
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154
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155 const char* tmpdir = os::get_temp_directory();
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156 const char* perfdir = PERFDATA_NAME;
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157 size_t nbytes = strlen(tmpdir) + strlen(perfdir) + strlen(user) + 3;
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158 char* dirname = NEW_C_HEAP_ARRAY(char, nbytes, mtInternal);
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159
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160 // construct the path name to user specific tmp directory
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161 snprintf(dirname, nbytes, "%s/%s_%s", tmpdir, perfdir, user);
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162
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163 return dirname;
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164 }
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165
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166 // convert the given file name into a process id. if the file
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167 // does not meet the file naming constraints, return 0.
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168 //
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169 static pid_t filename_to_pid(const char* filename) {
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170
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171 // a filename that doesn't begin with a digit is not a
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172 // candidate for conversion.
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173 //
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174 if (!isdigit(*filename)) {
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175 return 0;
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176 }
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177
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178 // check if file name can be converted to an integer without
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179 // any leftover characters.
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180 //
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181 char* remainder = NULL;
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182 errno = 0;
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183 pid_t pid = (pid_t)strtol(filename, &remainder, 10);
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184
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185 if (errno != 0) {
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186 return 0;
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187 }
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188
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189 // check for left over characters. If any, then the filename is
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190 // not a candidate for conversion.
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191 //
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192 if (remainder != NULL && *remainder != '\0') {
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193 return 0;
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194 }
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195
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196 // successful conversion, return the pid
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197 return pid;
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198 }
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199
20801
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200 // Check if the given statbuf is considered a secure directory for
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201 // the backing store files. Returns true if the directory is considered
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202 // a secure location. Returns false if the statbuf is a symbolic link or
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203 // if an error occurred.
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204 static bool is_statbuf_secure(struct stat *statp) {
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205 if (S_ISLNK(statp->st_mode) || !S_ISDIR(statp->st_mode)) {
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206 // The path represents a link or some non-directory file type,
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207 // which is not what we expected. Declare it insecure.
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208 //
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209 return false;
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210 }
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211 // We have an existing directory, check if the permissions are safe.
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212 if ((statp->st_mode & (S_IWGRP|S_IWOTH)) != 0) {
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213 // The directory is open for writing and could be subjected
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214 // to a symlink or a hard link attack. Declare it insecure.
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215 return false;
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216 }
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217 // See if the uid of the directory matches the effective uid of the process.
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218 //
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219 if (statp->st_uid != geteuid()) {
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220 // The directory was not created by this user, declare it insecure.
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221 return false;
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222 }
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223 return true;
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224 }
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225
20801
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226
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227 // Check if the given path is considered a secure directory for
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228 // the backing store files. Returns true if the directory exists
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229 // and is considered a secure location. Returns false if the path
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230 // is a symbolic link or if an error occurred.
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231 static bool is_directory_secure(const char* path) {
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232 struct stat statbuf;
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233 int result = 0;
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234
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235 RESTARTABLE(::lstat(path, &statbuf), result);
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236 if (result == OS_ERR) {
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237 return false;
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238 }
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239
20801
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240 // The path exists, see if it is secure.
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241 return is_statbuf_secure(&statbuf);
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242 }
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243
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244 // (Taken over from Solaris to support the O_NOFOLLOW case on AIX.)
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245 // Check if the given directory file descriptor is considered a secure
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246 // directory for the backing store files. Returns true if the directory
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247 // exists and is considered a secure location. Returns false if the path
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248 // is a symbolic link or if an error occurred.
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249 static bool is_dirfd_secure(int dir_fd) {
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250 struct stat statbuf;
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251 int result = 0;
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252
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253 RESTARTABLE(::fstat(dir_fd, &statbuf), result);
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254 if (result == OS_ERR) {
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255 return false;
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256 }
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257
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258 // The path exists, now check its mode.
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259 return is_statbuf_secure(&statbuf);
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260 }
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261
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262
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263 // Check to make sure fd1 and fd2 are referencing the same file system object.
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264 static bool is_same_fsobject(int fd1, int fd2) {
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265 struct stat statbuf1;
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266 struct stat statbuf2;
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267 int result = 0;
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268
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269 RESTARTABLE(::fstat(fd1, &statbuf1), result);
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270 if (result == OS_ERR) {
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271 return false;
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272 }
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273 RESTARTABLE(::fstat(fd2, &statbuf2), result);
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274 if (result == OS_ERR) {
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275 return false;
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276 }
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277
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278 if ((statbuf1.st_ino == statbuf2.st_ino) &&
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279 (statbuf1.st_dev == statbuf2.st_dev)) {
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280 return true;
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281 } else {
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282 return false;
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283 }
20801
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284 }
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285
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286 // Helper functions for open without O_NOFOLLOW which is not present on AIX 5.3/6.1.
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287 // We use the jdk6 implementation here.
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288 #ifndef O_NOFOLLOW
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289 // The O_NOFOLLOW oflag doesn't exist before solaris 5.10, this is to simulate that behaviour
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290 // was done in jdk 5/6 hotspot by Oracle this way
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291 static int open_o_nofollow_impl(const char* path, int oflag, mode_t mode, bool use_mode) {
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292 struct stat orig_st;
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diff changeset
293 struct stat new_st;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
294 bool create;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
295 int error;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
296 int fd;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
297
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
298 create = false;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
299
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
300 if (lstat(path, &orig_st) != 0) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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parents: 14415
diff changeset
301 if (errno == ENOENT && (oflag & O_CREAT) != 0) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
302 // File doesn't exist, but_we want to create it, add O_EXCL flag
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
303 // to make sure no-one creates it (or a symlink) before us
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
304 // This works as we expect with symlinks, from posix man page:
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
305 // 'If O_EXCL and O_CREAT are set, and path names a symbolic
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
306 // link, open() shall fail and set errno to [EEXIST]'.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
307 oflag |= O_EXCL;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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parents: 14415
diff changeset
308 create = true;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
309 } else {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
310 // File doesn't exist, and we are not creating it.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
311 return OS_ERR;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
312 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
313 } else {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
314 // Lstat success, check if existing file is a link.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
315 if ((orig_st.st_mode & S_IFMT) == S_IFLNK) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
316 // File is a symlink.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
317 errno = ELOOP;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
318 return OS_ERR;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
319 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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320 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
321
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
322 if (use_mode == true) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
323 fd = open(path, oflag, mode);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
324 } else {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
325 fd = open(path, oflag);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
326 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
327
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
328 if (fd == OS_ERR) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
329 return fd;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
330 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
331
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
332 // Can't do inode checks on before/after if we created the file.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
333 if (create == false) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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parents: 14415
diff changeset
334 if (fstat(fd, &new_st) != 0) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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parents: 14415
diff changeset
335 // Keep errno from fstat, in case close also fails.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
336 error = errno;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
337 ::close(fd);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
338 errno = error;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
339 return OS_ERR;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
340 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
341
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
342 if (orig_st.st_dev != new_st.st_dev || orig_st.st_ino != new_st.st_ino) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
343 // File was tampered with during race window.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
344 ::close(fd);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
345 errno = EEXIST;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
346 if (PrintMiscellaneous && Verbose) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
347 warning("possible file tampering attempt detected when opening %s", path);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
348 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
349 return OS_ERR;
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
350 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
351 }
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
352
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
353 return fd;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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parents: 14415
diff changeset
354 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
355
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
356 static int open_o_nofollow(const char* path, int oflag, mode_t mode) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
357 return open_o_nofollow_impl(path, oflag, mode, true);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
358 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
359
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
360 static int open_o_nofollow(const char* path, int oflag) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
361 return open_o_nofollow_impl(path, oflag, 0, false);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
362 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
363 #endif
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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364
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
365 // Open the directory of the given path and validate it.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
366 // Return a DIR * of the open directory.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
367 static DIR *open_directory_secure(const char* dirname) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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parents: 14415
diff changeset
368 // Open the directory using open() so that it can be verified
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
369 // to be secure by calling is_dirfd_secure(), opendir() and then check
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
370 // to see if they are the same file system object. This method does not
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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parents: 14415
diff changeset
371 // introduce a window of opportunity for the directory to be attacked that
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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parents: 14415
diff changeset
372 // calling opendir() and is_directory_secure() does.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
373 int result;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
374 DIR *dirp = NULL;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
375
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
376 // No O_NOFOLLOW defined at buildtime, and it is not documented for open;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
377 // so provide a workaround in this case.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
378 #ifdef O_NOFOLLOW
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
379 RESTARTABLE(::open(dirname, O_RDONLY|O_NOFOLLOW), result);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
380 #else
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
381 // workaround (jdk6 coding)
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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diff changeset
382 RESTARTABLE(::open_o_nofollow(dirname, O_RDONLY), result);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
383 #endif
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
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diff changeset
384
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
385 if (result == OS_ERR) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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parents: 14415
diff changeset
386 // Directory doesn't exist or is a symlink, so there is nothing to cleanup.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
387 if (PrintMiscellaneous && Verbose) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
388 if (errno == ELOOP) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
389 warning("directory %s is a symlink and is not secure\n", dirname);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
390 } else {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
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parents: 14415
diff changeset
391 warning("could not open directory %s: %s\n", dirname, strerror(errno));
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
392 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
393 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
394 return dirp;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
395 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
396 int fd = result;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
397
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
398 // Determine if the open directory is secure.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
399 if (!is_dirfd_secure(fd)) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
400 // The directory is not a secure directory.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
401 os::close(fd);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
402 return dirp;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
403 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
404
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
405 // Open the directory.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
406 dirp = ::opendir(dirname);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
407 if (dirp == NULL) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
408 // The directory doesn't exist, close fd and return.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
409 os::close(fd);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
410 return dirp;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
411 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
412
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
413 // Check to make sure fd and dirp are referencing the same file system object.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
414 if (!is_same_fsobject(fd, dirp->dd_fd)) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
415 // The directory is not secure.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
416 os::close(fd);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
417 os::closedir(dirp);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
418 dirp = NULL;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
419 return dirp;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
420 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
421
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
422 // Close initial open now that we know directory is secure
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
423 os::close(fd);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
424
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
425 return dirp;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
426 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
427
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
428 // NOTE: The code below uses fchdir(), open() and unlink() because
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
429 // fdopendir(), openat() and unlinkat() are not supported on all
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
430 // versions. Once the support for fdopendir(), openat() and unlinkat()
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
431 // is available on all supported versions the code can be changed
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
432 // to use these functions.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
433
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
434 // Open the directory of the given path, validate it and set the
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
435 // current working directory to it.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
436 // Return a DIR * of the open directory and the saved cwd fd.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
437 //
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
438 static DIR *open_directory_secure_cwd(const char* dirname, int *saved_cwd_fd) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
439
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
440 // Open the directory.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
441 DIR* dirp = open_directory_secure(dirname);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
442 if (dirp == NULL) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
443 // Directory doesn't exist or is insecure, so there is nothing to cleanup.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
444 return dirp;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
445 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
446 int fd = dirp->dd_fd;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
447
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
448 // Open a fd to the cwd and save it off.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
449 int result;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
450 RESTARTABLE(::open(".", O_RDONLY), result);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
451 if (result == OS_ERR) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
452 *saved_cwd_fd = -1;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
453 } else {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
454 *saved_cwd_fd = result;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
455 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
456
23455
9f8038f83a6e 8130910: hsperfdata file is created in wrong directory and not cleaned up if /tmp/hsperfdata_<username> has wrong permissions
clanger
parents: 20801
diff changeset
457 // Set the current directory to dirname by using the fd of the directory and
9f8038f83a6e 8130910: hsperfdata file is created in wrong directory and not cleaned up if /tmp/hsperfdata_<username> has wrong permissions
clanger
parents: 20801
diff changeset
458 // handle errors, otherwise shared memory files will be created in cwd.
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
459 result = fchdir(fd);
23455
9f8038f83a6e 8130910: hsperfdata file is created in wrong directory and not cleaned up if /tmp/hsperfdata_<username> has wrong permissions
clanger
parents: 20801
diff changeset
460 if (result == OS_ERR) {
9f8038f83a6e 8130910: hsperfdata file is created in wrong directory and not cleaned up if /tmp/hsperfdata_<username> has wrong permissions
clanger
parents: 20801
diff changeset
461 if (PrintMiscellaneous && Verbose) {
9f8038f83a6e 8130910: hsperfdata file is created in wrong directory and not cleaned up if /tmp/hsperfdata_<username> has wrong permissions
clanger
parents: 20801
diff changeset
462 warning("could not change to directory %s", dirname);
9f8038f83a6e 8130910: hsperfdata file is created in wrong directory and not cleaned up if /tmp/hsperfdata_<username> has wrong permissions
clanger
parents: 20801
diff changeset
463 }
9f8038f83a6e 8130910: hsperfdata file is created in wrong directory and not cleaned up if /tmp/hsperfdata_<username> has wrong permissions
clanger
parents: 20801
diff changeset
464 if (*saved_cwd_fd != -1) {
9f8038f83a6e 8130910: hsperfdata file is created in wrong directory and not cleaned up if /tmp/hsperfdata_<username> has wrong permissions
clanger
parents: 20801
diff changeset
465 ::close(*saved_cwd_fd);
9f8038f83a6e 8130910: hsperfdata file is created in wrong directory and not cleaned up if /tmp/hsperfdata_<username> has wrong permissions
clanger
parents: 20801
diff changeset
466 *saved_cwd_fd = -1;
9f8038f83a6e 8130910: hsperfdata file is created in wrong directory and not cleaned up if /tmp/hsperfdata_<username> has wrong permissions
clanger
parents: 20801
diff changeset
467 }
9f8038f83a6e 8130910: hsperfdata file is created in wrong directory and not cleaned up if /tmp/hsperfdata_<username> has wrong permissions
clanger
parents: 20801
diff changeset
468 // Close the directory.
9f8038f83a6e 8130910: hsperfdata file is created in wrong directory and not cleaned up if /tmp/hsperfdata_<username> has wrong permissions
clanger
parents: 20801
diff changeset
469 os::closedir(dirp);
9f8038f83a6e 8130910: hsperfdata file is created in wrong directory and not cleaned up if /tmp/hsperfdata_<username> has wrong permissions
clanger
parents: 20801
diff changeset
470 return NULL;
9f8038f83a6e 8130910: hsperfdata file is created in wrong directory and not cleaned up if /tmp/hsperfdata_<username> has wrong permissions
clanger
parents: 20801
diff changeset
471 } else {
9f8038f83a6e 8130910: hsperfdata file is created in wrong directory and not cleaned up if /tmp/hsperfdata_<username> has wrong permissions
clanger
parents: 20801
diff changeset
472 return dirp;
9f8038f83a6e 8130910: hsperfdata file is created in wrong directory and not cleaned up if /tmp/hsperfdata_<username> has wrong permissions
clanger
parents: 20801
diff changeset
473 }
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
474 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
475
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
476 // Close the directory and restore the current working directory.
23455
9f8038f83a6e 8130910: hsperfdata file is created in wrong directory and not cleaned up if /tmp/hsperfdata_<username> has wrong permissions
clanger
parents: 20801
diff changeset
477 //
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
478 static void close_directory_secure_cwd(DIR* dirp, int saved_cwd_fd) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
479
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
480 int result;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
481 // If we have a saved cwd change back to it and close the fd.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
482 if (saved_cwd_fd != -1) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
483 result = fchdir(saved_cwd_fd);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
484 ::close(saved_cwd_fd);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
485 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
486
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
487 // Close the directory.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
488 os::closedir(dirp);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
489 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
490
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
491 // Check if the given file descriptor is considered a secure.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
492 static bool is_file_secure(int fd, const char *filename) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
493
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
494 int result;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
495 struct stat statbuf;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
496
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
497 // Determine if the file is secure.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
498 RESTARTABLE(::fstat(fd, &statbuf), result);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
499 if (result == OS_ERR) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
500 if (PrintMiscellaneous && Verbose) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
501 warning("fstat failed on %s: %s\n", filename, strerror(errno));
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
502 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
503 return false;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
504 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
505 if (statbuf.st_nlink > 1) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
506 // A file with multiple links is not expected.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
507 if (PrintMiscellaneous && Verbose) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
508 warning("file %s has multiple links\n", filename);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
509 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
510 return false;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
511 }
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
512 return true;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
513 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
514
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
515 // Return the user name for the given user id.
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
516 //
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
517 // The caller is expected to free the allocated memory.
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
518 static char* get_user_name(uid_t uid) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
519
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
520 struct passwd pwent;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
521
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
522 // Determine the max pwbuf size from sysconf, and hardcode
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
523 // a default if this not available through sysconf.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
524 long bufsize = sysconf(_SC_GETPW_R_SIZE_MAX);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
525 if (bufsize == -1)
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
526 bufsize = 1024;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
527
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
528 char* pwbuf = NEW_C_HEAP_ARRAY(char, bufsize, mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
529
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
530 // POSIX interface to getpwuid_r is used on LINUX
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
531 struct passwd* p;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
532 int result = getpwuid_r(uid, &pwent, pwbuf, (size_t)bufsize, &p);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
533
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
534 if (result != 0 || p == NULL || p->pw_name == NULL || *(p->pw_name) == '\0') {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
535 if (PrintMiscellaneous && Verbose) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
536 if (result != 0) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
537 warning("Could not retrieve passwd entry: %s\n",
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
538 strerror(result));
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
539 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
540 else if (p == NULL) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
541 // this check is added to protect against an observed problem
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
542 // with getpwuid_r() on RedHat 9 where getpwuid_r returns 0,
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
543 // indicating success, but has p == NULL. This was observed when
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
544 // inserting a file descriptor exhaustion fault prior to the call
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
545 // getpwuid_r() call. In this case, error is set to the appropriate
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
546 // error condition, but this is undocumented behavior. This check
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
547 // is safe under any condition, but the use of errno in the output
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
548 // message may result in an erroneous message.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
549 // Bug Id 89052 was opened with RedHat.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
550 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
551 warning("Could not retrieve passwd entry: %s\n",
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
552 strerror(errno));
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
553 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
554 else {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
555 warning("Could not determine user name: %s\n",
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
556 p->pw_name == NULL ? "pw_name = NULL" :
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
557 "pw_name zero length");
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
558 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
559 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
560 FREE_C_HEAP_ARRAY(char, pwbuf, mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
561 return NULL;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
562 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
563
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
564 char* user_name = NEW_C_HEAP_ARRAY(char, strlen(p->pw_name) + 1, mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
565 strcpy(user_name, p->pw_name);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
566
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
567 FREE_C_HEAP_ARRAY(char, pwbuf, mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
568 return user_name;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
569 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
570
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
571 // return the name of the user that owns the process identified by vmid.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
572 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
573 // This method uses a slow directory search algorithm to find the backing
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
574 // store file for the specified vmid and returns the user name, as determined
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
575 // by the user name suffix of the hsperfdata_<username> directory name.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
576 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
577 // the caller is expected to free the allocated memory.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
578 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
579 static char* get_user_name_slow(int vmid, TRAPS) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
580
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
581 // short circuit the directory search if the process doesn't even exist.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
582 if (kill(vmid, 0) == OS_ERR) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
583 if (errno == ESRCH) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
584 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
585 "Process not found");
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
586 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
587 else /* EPERM */ {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
588 THROW_MSG_0(vmSymbols::java_io_IOException(), strerror(errno));
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
589 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
590 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
591
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
592 // directory search
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
593 char* oldest_user = NULL;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
594 time_t oldest_ctime = 0;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
595
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
596 const char* tmpdirname = os::get_temp_directory();
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
597
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
598 DIR* tmpdirp = os::opendir(tmpdirname);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
599
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
600 if (tmpdirp == NULL) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
601 return NULL;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
602 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
603
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
604 // for each entry in the directory that matches the pattern hsperfdata_*,
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
605 // open the directory and check if the file for the given vmid exists.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
606 // The file with the expected name and the latest creation date is used
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
607 // to determine the user name for the process id.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
608 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
609 struct dirent* dentry;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
610 char* tdbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(tmpdirname), mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
611 errno = 0;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
612 while ((dentry = os::readdir(tmpdirp, (struct dirent *)tdbuf)) != NULL) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
613
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
614 // check if the directory entry is a hsperfdata file
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
615 if (strncmp(dentry->d_name, PERFDATA_NAME, strlen(PERFDATA_NAME)) != 0) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
616 continue;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
617 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
618
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
619 char* usrdir_name = NEW_C_HEAP_ARRAY(char,
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
620 strlen(tmpdirname) + strlen(dentry->d_name) + 2, mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
621 strcpy(usrdir_name, tmpdirname);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
622 strcat(usrdir_name, "/");
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
623 strcat(usrdir_name, dentry->d_name);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
624
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
625 // Open the user directory.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
626 DIR* subdirp = open_directory_secure(usrdir_name);
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
627
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
628 if (subdirp == NULL) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
629 FREE_C_HEAP_ARRAY(char, usrdir_name, mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
630 continue;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
631 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
632
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
633 // Since we don't create the backing store files in directories
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
634 // pointed to by symbolic links, we also don't follow them when
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
635 // looking for the files. We check for a symbolic link after the
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
636 // call to opendir in order to eliminate a small window where the
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
637 // symlink can be exploited.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
638 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
639 if (!is_directory_secure(usrdir_name)) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
640 FREE_C_HEAP_ARRAY(char, usrdir_name, mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
641 os::closedir(subdirp);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
642 continue;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
643 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
644
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
645 struct dirent* udentry;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
646 char* udbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(usrdir_name), mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
647 errno = 0;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
648 while ((udentry = os::readdir(subdirp, (struct dirent *)udbuf)) != NULL) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
649
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
650 if (filename_to_pid(udentry->d_name) == vmid) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
651 struct stat statbuf;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
652 int result;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
653
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
654 char* filename = NEW_C_HEAP_ARRAY(char,
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
655 strlen(usrdir_name) + strlen(udentry->d_name) + 2, mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
656
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
657 strcpy(filename, usrdir_name);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
658 strcat(filename, "/");
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
659 strcat(filename, udentry->d_name);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
660
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
661 // don't follow symbolic links for the file
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
662 RESTARTABLE(::lstat(filename, &statbuf), result);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
663 if (result == OS_ERR) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
664 FREE_C_HEAP_ARRAY(char, filename, mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
665 continue;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
666 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
667
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
668 // skip over files that are not regular files.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
669 if (!S_ISREG(statbuf.st_mode)) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
670 FREE_C_HEAP_ARRAY(char, filename, mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
671 continue;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
672 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
673
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
674 // compare and save filename with latest creation time
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
675 if (statbuf.st_size > 0 && statbuf.st_ctime > oldest_ctime) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
676
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
677 if (statbuf.st_ctime > oldest_ctime) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
678 char* user = strchr(dentry->d_name, '_') + 1;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
679
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
680 if (oldest_user != NULL) FREE_C_HEAP_ARRAY(char, oldest_user, mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
681 oldest_user = NEW_C_HEAP_ARRAY(char, strlen(user)+1, mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
682
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
683 strcpy(oldest_user, user);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
684 oldest_ctime = statbuf.st_ctime;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
685 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
686 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
687
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
688 FREE_C_HEAP_ARRAY(char, filename, mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
689 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
690 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
691 os::closedir(subdirp);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
692 FREE_C_HEAP_ARRAY(char, udbuf, mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
693 FREE_C_HEAP_ARRAY(char, usrdir_name, mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
694 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
695 os::closedir(tmpdirp);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
696 FREE_C_HEAP_ARRAY(char, tdbuf, mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
697
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
698 return(oldest_user);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
699 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
700
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
701 // return the name of the user that owns the JVM indicated by the given vmid.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
702 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
703 static char* get_user_name(int vmid, TRAPS) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
704 return get_user_name_slow(vmid, CHECK_NULL);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
705 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
706
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
707 // return the file name of the backing store file for the named
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
708 // shared memory region for the given user name and vmid.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
709 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
710 // the caller is expected to free the allocated memory.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
711 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
712 static char* get_sharedmem_filename(const char* dirname, int vmid) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
713
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
714 // add 2 for the file separator and a null terminator.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
715 size_t nbytes = strlen(dirname) + UINT_CHARS + 2;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
716
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
717 char* name = NEW_C_HEAP_ARRAY(char, nbytes, mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
718 snprintf(name, nbytes, "%s/%d", dirname, vmid);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
719
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
720 return name;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
721 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
722
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
723
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
724 // remove file
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
725 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
726 // this method removes the file specified by the given path
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
727 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
728 static void remove_file(const char* path) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
729
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
730 int result;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
731
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
732 // if the file is a directory, the following unlink will fail. since
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
733 // we don't expect to find directories in the user temp directory, we
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
734 // won't try to handle this situation. even if accidentially or
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
735 // maliciously planted, the directory's presence won't hurt anything.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
736 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
737 RESTARTABLE(::unlink(path), result);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
738 if (PrintMiscellaneous && Verbose && result == OS_ERR) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
739 if (errno != ENOENT) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
740 warning("Could not unlink shared memory backing"
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
741 " store file %s : %s\n", path, strerror(errno));
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
742 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
743 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
744 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
745
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
746 // Cleanup stale shared memory resources
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
747 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
748 // This method attempts to remove all stale shared memory files in
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
749 // the named user temporary directory. It scans the named directory
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
750 // for files matching the pattern ^$[0-9]*$. For each file found, the
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
751 // process id is extracted from the file name and a test is run to
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
752 // determine if the process is alive. If the process is not alive,
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
753 // any stale file resources are removed.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
754 static void cleanup_sharedmem_resources(const char* dirname) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
755
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
756 int saved_cwd_fd;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
757 // Open the directory.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
758 DIR* dirp = open_directory_secure_cwd(dirname, &saved_cwd_fd);
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
759 if (dirp == NULL) {
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
760 // Directory doesn't exist or is insecure, so there is nothing to cleanup.
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
761 return;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
762 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
763
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
764 // For each entry in the directory that matches the expected file
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
765 // name pattern, determine if the file resources are stale and if
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
766 // so, remove the file resources. Note, instrumented HotSpot processes
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
767 // for this user may start and/or terminate during this search and
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
768 // remove or create new files in this directory. The behavior of this
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
769 // loop under these conditions is dependent upon the implementation of
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
770 // opendir/readdir.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
771 struct dirent* entry;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
772 char* dbuf = NEW_C_HEAP_ARRAY(char, os::readdir_buf_size(dirname), mtInternal);
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
773
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
774 errno = 0;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
775 while ((entry = os::readdir(dirp, (struct dirent *)dbuf)) != NULL) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
776
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
777 pid_t pid = filename_to_pid(entry->d_name);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
778
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
779 if (pid == 0) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
780
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
781 if (strcmp(entry->d_name, ".") != 0 && strcmp(entry->d_name, "..") != 0) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
782
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
783 // Attempt to remove all unexpected files, except "." and "..".
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
784 unlink(entry->d_name);
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
785 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
786
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
787 errno = 0;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
788 continue;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
789 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
790
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
791 // We now have a file name that converts to a valid integer
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
792 // that could represent a process id . if this process id
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
793 // matches the current process id or the process is not running,
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
794 // then remove the stale file resources.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
795 //
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
796 // Process liveness is detected by sending signal number 0 to
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
797 // the process id (see kill(2)). if kill determines that the
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
798 // process does not exist, then the file resources are removed.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
799 // if kill determines that that we don't have permission to
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
800 // signal the process, then the file resources are assumed to
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
801 // be stale and are removed because the resources for such a
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
802 // process should be in a different user specific directory.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
803 if ((pid == os::current_process_id()) ||
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
804 (kill(pid, 0) == OS_ERR && (errno == ESRCH || errno == EPERM))) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
805
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
806 unlink(entry->d_name);
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
807 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
808 errno = 0;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
809 }
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
810
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
811 // Close the directory and reset the current working directory.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
812 close_directory_secure_cwd(dirp, saved_cwd_fd);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
813
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
814 FREE_C_HEAP_ARRAY(char, dbuf, mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
815 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
816
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
817 // Make the user specific temporary directory. Returns true if
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
818 // the directory exists and is secure upon return. Returns false
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
819 // if the directory exists but is either a symlink, is otherwise
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
820 // insecure, or if an error occurred.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
821 static bool make_user_tmp_dir(const char* dirname) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
822
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
823 // Create the directory with 0755 permissions. note that the directory
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
824 // will be owned by euid::egid, which may not be the same as uid::gid.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
825 if (mkdir(dirname, S_IRWXU|S_IRGRP|S_IXGRP|S_IROTH|S_IXOTH) == OS_ERR) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
826 if (errno == EEXIST) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
827 // The directory already exists and was probably created by another
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
828 // JVM instance. However, this could also be the result of a
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
829 // deliberate symlink. Verify that the existing directory is safe.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
830 if (!is_directory_secure(dirname)) {
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
831 // Directory is not secure.
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
832 if (PrintMiscellaneous && Verbose) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
833 warning("%s directory is insecure\n", dirname);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
834 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
835 return false;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
836 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
837 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
838 else {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
839 // we encountered some other failure while attempting
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
840 // to create the directory
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
841 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
842 if (PrintMiscellaneous && Verbose) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
843 warning("could not create directory %s: %s\n",
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
844 dirname, strerror(errno));
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
845 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
846 return false;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
847 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
848 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
849 return true;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
850 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
851
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
852 // create the shared memory file resources
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
853 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
854 // This method creates the shared memory file with the given size
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
855 // This method also creates the user specific temporary directory, if
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
856 // it does not yet exist.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
857 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
858 static int create_sharedmem_resources(const char* dirname, const char* filename, size_t size) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
859
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
860 // make the user temporary directory
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
861 if (!make_user_tmp_dir(dirname)) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
862 // could not make/find the directory or the found directory
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
863 // was not secure
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
864 return -1;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
865 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
866
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
867 int saved_cwd_fd;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
868 // Open the directory and set the current working directory to it.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
869 DIR* dirp = open_directory_secure_cwd(dirname, &saved_cwd_fd);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
870 if (dirp == NULL) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
871 // Directory doesn't exist or is insecure, so cannot create shared
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
872 // memory file.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
873 return -1;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
874 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
875
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
876 // Open the filename in the current directory.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
877 // Cannot use O_TRUNC here; truncation of an existing file has to happen
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
878 // after the is_file_secure() check below.
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
879 int result;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
880
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
881 // No O_NOFOLLOW defined at buildtime, and it is not documented for open;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
882 // so provide a workaround in this case.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
883 #ifdef O_NOFOLLOW
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
884 RESTARTABLE(::open(filename, O_RDWR|O_CREAT|O_NOFOLLOW, S_IREAD|S_IWRITE), result);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
885 #else
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
886 // workaround function (jdk6 code)
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
887 RESTARTABLE(::open_o_nofollow(filename, O_RDWR|O_CREAT, S_IREAD|S_IWRITE), result);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
888 #endif
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
889
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
890 if (result == OS_ERR) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
891 if (PrintMiscellaneous && Verbose) {
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
892 if (errno == ELOOP) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
893 warning("file %s is a symlink and is not secure\n", filename);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
894 } else {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
895 warning("could not create file %s: %s\n", filename, strerror(errno));
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
896 }
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
897 }
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
898 // Close the directory and reset the current working directory.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
899 close_directory_secure_cwd(dirp, saved_cwd_fd);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
900
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
901 return -1;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
902 }
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
903 // Close the directory and reset the current working directory.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
904 close_directory_secure_cwd(dirp, saved_cwd_fd);
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
905
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
906 // save the file descriptor
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
907 int fd = result;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
908
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
909 // Check to see if the file is secure.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
910 if (!is_file_secure(fd, filename)) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
911 ::close(fd);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
912 return -1;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
913 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
914
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
915 // Truncate the file to get rid of any existing data.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
916 RESTARTABLE(::ftruncate(fd, (off_t)0), result);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
917 if (result == OS_ERR) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
918 if (PrintMiscellaneous && Verbose) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
919 warning("could not truncate shared memory file: %s\n", strerror(errno));
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
920 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
921 ::close(fd);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
922 return -1;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
923 }
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
924 // set the file size
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
925 RESTARTABLE(::ftruncate(fd, (off_t)size), result);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
926 if (result == OS_ERR) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
927 if (PrintMiscellaneous && Verbose) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
928 warning("could not set shared memory file size: %s\n", strerror(errno));
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
929 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
930 RESTARTABLE(::close(fd), result);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
931 return -1;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
932 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
933
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
934 return fd;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
935 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
936
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
937 // open the shared memory file for the given user and vmid. returns
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
938 // the file descriptor for the open file or -1 if the file could not
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
939 // be opened.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
940 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
941 static int open_sharedmem_file(const char* filename, int oflags, TRAPS) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
942
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
943 // open the file
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
944 int result;
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
945 // No O_NOFOLLOW defined at buildtime, and it is not documented for open;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
946 // so provide a workaround in this case
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
947 #ifdef O_NOFOLLOW
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
948 RESTARTABLE(::open(filename, oflags), result);
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
949 #else
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
950 RESTARTABLE(::open_o_nofollow(filename, oflags), result);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
951 #endif
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
952
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
953 if (result == OS_ERR) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
954 if (errno == ENOENT) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
955 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
956 "Process not found");
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
957 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
958 else if (errno == EACCES) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
959 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(),
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
960 "Permission denied");
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
961 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
962 else {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
963 THROW_MSG_0(vmSymbols::java_io_IOException(), strerror(errno));
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
964 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
965 }
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
966 int fd = result;
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
967
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
968 // Check to see if the file is secure.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
969 if (!is_file_secure(fd, filename)) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
970 ::close(fd);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
971 return -1;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
972 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
973
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
974 return fd;
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
975 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
976
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
977 // create a named shared memory region. returns the address of the
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
978 // memory region on success or NULL on failure. A return value of
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
979 // NULL will ultimately disable the shared memory feature.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
980 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
981 // On Solaris and Linux, the name space for shared memory objects
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
982 // is the file system name space.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
983 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
984 // A monitoring application attaching to a JVM does not need to know
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
985 // the file system name of the shared memory object. However, it may
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
986 // be convenient for applications to discover the existence of newly
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
987 // created and terminating JVMs by watching the file system name space
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
988 // for files being created or removed.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
989 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
990 static char* mmap_create_shared(size_t size) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
991
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
992 int result;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
993 int fd;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
994 char* mapAddress;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
995
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
996 int vmid = os::current_process_id();
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
997
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
998 char* user_name = get_user_name(geteuid());
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
999
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1000 if (user_name == NULL)
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1001 return NULL;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1002
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1003 char* dirname = get_user_tmp_dir(user_name);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1004 char* filename = get_sharedmem_filename(dirname, vmid);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1005
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
1006 // Get the short filename.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
1007 char* short_filename = strrchr(filename, '/');
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
1008 if (short_filename == NULL) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
1009 short_filename = filename;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
1010 } else {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
1011 short_filename++;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
1012 }
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
1013
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1014 // cleanup any stale shared memory files
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1015 cleanup_sharedmem_resources(dirname);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1016
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1017 assert(((size > 0) && (size % os::vm_page_size() == 0)),
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1018 "unexpected PerfMemory region size");
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1019
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
1020 fd = create_sharedmem_resources(dirname, short_filename, size);
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1021
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1022 FREE_C_HEAP_ARRAY(char, user_name, mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1023 FREE_C_HEAP_ARRAY(char, dirname, mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1024
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1025 if (fd == -1) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1026 FREE_C_HEAP_ARRAY(char, filename, mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1027 return NULL;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1028 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1029
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1030 mapAddress = (char*)::mmap((char*)0, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1031
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1032 // attempt to close the file - restart it if it was interrupted,
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1033 // but ignore other failures
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1034 RESTARTABLE(::close(fd), result);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1035 assert(result != OS_ERR, "could not close file");
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1036
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1037 if (mapAddress == MAP_FAILED) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1038 if (PrintMiscellaneous && Verbose) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1039 warning("mmap failed - %s\n", strerror(errno));
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1040 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1041 remove_file(filename);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1042 FREE_C_HEAP_ARRAY(char, filename, mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1043 return NULL;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1044 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1045
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1046 // save the file name for use in delete_shared_memory()
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1047 backing_store_file_name = filename;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1048
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1049 // clear the shared memory region
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1050 (void)::memset((void*) mapAddress, 0, size);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1051
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
1052 // It does not go through os api, the operation has to record from here.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
1053 MemTracker::record_virtual_memory_reserve((address)mapAddress, size, CURRENT_PC, mtInternal);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
1054
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1055 return mapAddress;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1056 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1057
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1058 // release a named shared memory region
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1059 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1060 static void unmap_shared(char* addr, size_t bytes) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1061 // Do not rely on os::reserve_memory/os::release_memory to use mmap.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1062 // Use os::reserve_memory/os::release_memory for PerfDisableSharedMem=1, mmap/munmap for PerfDisableSharedMem=0
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1063 if (::munmap(addr, bytes) == -1) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1064 warning("perfmemory: munmap failed (%d)\n", errno);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1065 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1066 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1067
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1068 // create the PerfData memory region in shared memory.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1069 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1070 static char* create_shared_memory(size_t size) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1071
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1072 // create the shared memory region.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1073 return mmap_create_shared(size);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1074 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1075
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1076 // delete the shared PerfData memory region
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1077 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1078 static void delete_shared_memory(char* addr, size_t size) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1079
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1080 // cleanup the persistent shared memory resources. since DestroyJavaVM does
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1081 // not support unloading of the JVM, unmapping of the memory resource is
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1082 // not performed. The memory will be reclaimed by the OS upon termination of
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1083 // the process. The backing store file is deleted from the file system.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1084
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1085 assert(!PerfDisableSharedMem, "shouldn't be here");
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1086
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1087 if (backing_store_file_name != NULL) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1088 remove_file(backing_store_file_name);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1089 // Don't.. Free heap memory could deadlock os::abort() if it is called
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1090 // from signal handler. OS will reclaim the heap memory.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1091 // FREE_C_HEAP_ARRAY(char, backing_store_file_name, mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1092 backing_store_file_name = NULL;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1093 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1094 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1095
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1096 // return the size of the file for the given file descriptor
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1097 // or 0 if it is not a valid size for a shared memory file
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1098 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1099 static size_t sharedmem_filesize(int fd, TRAPS) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1100
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1101 struct stat statbuf;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1102 int result;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1103
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1104 RESTARTABLE(::fstat(fd, &statbuf), result);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1105 if (result == OS_ERR) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1106 if (PrintMiscellaneous && Verbose) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1107 warning("fstat failed: %s\n", strerror(errno));
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1108 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1109 THROW_MSG_0(vmSymbols::java_io_IOException(),
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1110 "Could not determine PerfMemory size");
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1111 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1112
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1113 if ((statbuf.st_size == 0) ||
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1114 ((size_t)statbuf.st_size % os::vm_page_size() != 0)) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1115 THROW_MSG_0(vmSymbols::java_lang_Exception(),
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1116 "Invalid PerfMemory size");
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1117 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1118
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1119 return (size_t)statbuf.st_size;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1120 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1121
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1122 // attach to a named shared memory region.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1123 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1124 static void mmap_attach_shared(const char* user, int vmid, PerfMemory::PerfMemoryMode mode, char** addr, size_t* sizep, TRAPS) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1125
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1126 char* mapAddress;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1127 int result;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1128 int fd;
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
1129 size_t size = 0;
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1130 const char* luser = NULL;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1131
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1132 int mmap_prot;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1133 int file_flags;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1134
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1135 ResourceMark rm;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1136
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1137 // map the high level access mode to the appropriate permission
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1138 // constructs for the file and the shared memory mapping.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1139 if (mode == PerfMemory::PERF_MODE_RO) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1140 mmap_prot = PROT_READ;
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
1141
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
1142 // No O_NOFOLLOW defined at buildtime, and it is not documented for open.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
1143 #ifdef O_NOFOLLOW
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
1144 file_flags = O_RDONLY | O_NOFOLLOW;
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
1145 #else
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1146 file_flags = O_RDONLY;
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
1147 #endif
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1148 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1149 else if (mode == PerfMemory::PERF_MODE_RW) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1150 #ifdef LATER
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1151 mmap_prot = PROT_READ | PROT_WRITE;
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
1152 file_flags = O_RDWR | O_NOFOLLOW;
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1153 #else
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1154 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1155 "Unsupported access mode");
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1156 #endif
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1157 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1158 else {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1159 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1160 "Illegal access mode");
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1161 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1162
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1163 if (user == NULL || strlen(user) == 0) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1164 luser = get_user_name(vmid, CHECK);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1165 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1166 else {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1167 luser = user;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1168 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1169
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1170 if (luser == NULL) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1171 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1172 "Could not map vmid to user Name");
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1173 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1174
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1175 char* dirname = get_user_tmp_dir(luser);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1176
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1177 // since we don't follow symbolic links when creating the backing
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1178 // store file, we don't follow them when attaching either.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1179 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1180 if (!is_directory_secure(dirname)) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1181 FREE_C_HEAP_ARRAY(char, dirname, mtInternal);
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
1182 if (luser != user) {
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
1183 FREE_C_HEAP_ARRAY(char, luser, mtInternal);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
1184 }
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1185 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1186 "Process not found");
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1187 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1188
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1189 char* filename = get_sharedmem_filename(dirname, vmid);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1190
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1191 // copy heap memory to resource memory. the open_sharedmem_file
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1192 // method below need to use the filename, but could throw an
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1193 // exception. using a resource array prevents the leak that
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1194 // would otherwise occur.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1195 char* rfilename = NEW_RESOURCE_ARRAY(char, strlen(filename) + 1);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1196 strcpy(rfilename, filename);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1197
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1198 // free the c heap resources that are no longer needed
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1199 if (luser != user) FREE_C_HEAP_ARRAY(char, luser, mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1200 FREE_C_HEAP_ARRAY(char, dirname, mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1201 FREE_C_HEAP_ARRAY(char, filename, mtInternal);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1202
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1203 // open the shared memory file for the give vmid
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1204 fd = open_sharedmem_file(rfilename, file_flags, CHECK);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1205 assert(fd != OS_ERR, "unexpected value");
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1206
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1207 if (*sizep == 0) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1208 size = sharedmem_filesize(fd, CHECK);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1209 assert(size != 0, "unexpected size");
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1210 } else {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1211 size = *sizep;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1212 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1213
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1214 mapAddress = (char*)::mmap((char*)0, size, mmap_prot, MAP_SHARED, fd, 0);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1215
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1216 // attempt to close the file - restart if it gets interrupted,
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1217 // but ignore other failures
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1218 RESTARTABLE(::close(fd), result);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1219 assert(result != OS_ERR, "could not close file");
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1220
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1221 if (mapAddress == MAP_FAILED) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1222 if (PrintMiscellaneous && Verbose) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1223 warning("mmap failed: %s\n", strerror(errno));
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1224 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1225 THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1226 "Could not map PerfMemory");
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1227 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1228
20801
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
1229 // It does not go through os api, the operation has to record from here.
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
1230 MemTracker::record_virtual_memory_reserve((address)mapAddress, size, CURRENT_PC, mtInternal);
b9c06f87e476 8069590: AIX port of "8050807: Better performing performance data handling"
goetz
parents: 14415
diff changeset
1231
14415
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1232 *addr = mapAddress;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1233 *sizep = size;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1234
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1235 if (PerfTraceMemOps) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1236 tty->print("mapped " SIZE_FORMAT " bytes for vmid %d at "
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1237 INTPTR_FORMAT "\n", size, vmid, (void*)mapAddress);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1238 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1239 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1240
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1241
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1242
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1243
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1244 // create the PerfData memory region
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1245 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1246 // This method creates the memory region used to store performance
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1247 // data for the JVM. The memory may be created in standard or
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1248 // shared memory.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1249 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1250 void PerfMemory::create_memory_region(size_t size) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1251
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1252 if (PerfDisableSharedMem) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1253 // do not share the memory for the performance data.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1254 _start = create_standard_memory(size);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1255 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1256 else {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1257 _start = create_shared_memory(size);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1258 if (_start == NULL) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1259
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1260 // creation of the shared memory region failed, attempt
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1261 // to create a contiguous, non-shared memory region instead.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1262 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1263 if (PrintMiscellaneous && Verbose) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1264 warning("Reverting to non-shared PerfMemory region.\n");
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1265 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1266 PerfDisableSharedMem = true;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1267 _start = create_standard_memory(size);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1268 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1269 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1270
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1271 if (_start != NULL) _capacity = size;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1272
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1273 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1274
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1275 // delete the PerfData memory region
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1276 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1277 // This method deletes the memory region used to store performance
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1278 // data for the JVM. The memory region indicated by the <address, size>
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1279 // tuple will be inaccessible after a call to this method.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1280 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1281 void PerfMemory::delete_memory_region() {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1282
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1283 assert((start() != NULL && capacity() > 0), "verify proper state");
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1284
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1285 // If user specifies PerfDataSaveFile, it will save the performance data
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1286 // to the specified file name no matter whether PerfDataSaveToFile is specified
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1287 // or not. In other word, -XX:PerfDataSaveFile=.. overrides flag
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1288 // -XX:+PerfDataSaveToFile.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1289 if (PerfDataSaveToFile || PerfDataSaveFile != NULL) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1290 save_memory_to_file(start(), capacity());
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1291 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1292
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1293 if (PerfDisableSharedMem) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1294 delete_standard_memory(start(), capacity());
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1295 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1296 else {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1297 delete_shared_memory(start(), capacity());
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1298 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1299 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1300
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1301 // attach to the PerfData memory region for another JVM
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1302 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1303 // This method returns an <address, size> tuple that points to
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1304 // a memory buffer that is kept reasonably synchronized with
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1305 // the PerfData memory region for the indicated JVM. This
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1306 // buffer may be kept in synchronization via shared memory
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1307 // or some other mechanism that keeps the buffer updated.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1308 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1309 // If the JVM chooses not to support the attachability feature,
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
simonis
parents:
diff changeset
1310 // this method should throw an UnsupportedOperation exception.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1311 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1312 // This implementation utilizes named shared memory to map
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1313 // the indicated process's PerfData memory region into this JVMs
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1314 // address space.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1315 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1316 void PerfMemory::attach(const char* user, int vmid, PerfMemoryMode mode, char** addrp, size_t* sizep, TRAPS) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1317
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1318 if (vmid == 0 || vmid == os::current_process_id()) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1319 *addrp = start();
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1320 *sizep = capacity();
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1321 return;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1322 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1323
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1324 mmap_attach_shared(user, vmid, mode, addrp, sizep, CHECK);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1325 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1326
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1327 // detach from the PerfData memory region of another JVM
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1328 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1329 // This method detaches the PerfData memory region of another
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1330 // JVM, specified as an <address, size> tuple of a buffer
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1331 // in this process's address space. This method may perform
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1332 // arbitrary actions to accomplish the detachment. The memory
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1333 // region specified by <address, size> will be inaccessible after
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1334 // a call to this method.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1335 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1336 // If the JVM chooses not to support the attachability feature,
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1337 // this method should throw an UnsupportedOperation exception.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1338 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1339 // This implementation utilizes named shared memory to detach
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1340 // the indicated process's PerfData memory region from this
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1341 // process's address space.
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1342 //
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1343 void PerfMemory::detach(char* addr, size_t bytes, TRAPS) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1344
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1345 assert(addr != 0, "address sanity check");
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1346 assert(bytes > 0, "capacity sanity check");
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1347
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1348 if (PerfMemory::contains(addr) || PerfMemory::contains(addr + bytes - 1)) {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1349 // prevent accidental detachment of this process's PerfMemory region
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1350 return;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1351 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1352
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1353 unmap_shared(addr, bytes);
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1354 }
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1355
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1356 char* PerfMemory::backing_store_filename() {
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1357 return backing_store_file_name;
666e6ce3976c 8023038: PPC64 (part 15): Platform files for AIX/PPC64 support
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1358 }