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4133
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1 /*
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2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #include "precompiled.hpp"
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26 #include "memory/oopFactory.hpp"
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27 #include "runtime/javaCalls.hpp"
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28 #include "runtime/mutexLocker.hpp"
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29 #include "services/diagnosticArgument.hpp"
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30 #include "services/diagnosticFramework.hpp"
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31 #include "services/management.hpp"
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32
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33 CmdLine::CmdLine(const char* line, size_t len, bool no_command_name) {
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34 assert(line != NULL, "Command line string should not be NULL");
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35 const char* line_end;
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36 const char* cmd_end;
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37
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38 _cmd = line;
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39 line_end = &line[len];
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40
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41 // Skip whitespace in the beginning of the line.
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42 while (_cmd < line_end && isspace((int) _cmd[0])) {
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43 _cmd++;
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44 }
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45 cmd_end = _cmd;
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46
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47 if (no_command_name) {
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48 _cmd = NULL;
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49 _cmd_len = 0;
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50 } else {
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51 // Look for end of the command name
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52 while (cmd_end < line_end && !isspace((int) cmd_end[0])) {
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53 cmd_end++;
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54 }
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55 _cmd_len = cmd_end - _cmd;
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56 }
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57 _args = cmd_end;
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58 _args_len = line_end - _args;
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59 }
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60
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61 bool DCmdArgIter::next(TRAPS) {
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62 if (_len == 0) return false;
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63 // skipping spaces
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64 while (_cursor < _len - 1 && isspace(_buffer[_cursor])) {
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65 _cursor++;
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66 }
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67 // handling end of command line
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68 if (_cursor >= _len - 1) {
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69 _cursor = _len - 1;
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70 _key_addr = &_buffer[_len - 1];
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71 _key_len = 0;
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72 _value_addr = &_buffer[_len - 1];
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73 _value_len = 0;
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74 return false;
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75 }
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76 // extracting first item, argument or option name
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77 _key_addr = &_buffer[_cursor];
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78 while (_cursor <= _len - 1 && _buffer[_cursor] != '=' && _buffer[_cursor] != _delim) {
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79 // argument can be surrounded by single or double quotes
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80 if (_buffer[_cursor] == '\"' || _buffer[_cursor] == '\'') {
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81 _key_addr++;
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82 char quote = _buffer[_cursor];
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83 while (_cursor < _len - 1) {
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84 _cursor++;
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85 if (_buffer[_cursor] == quote && _buffer[_cursor - 1] != '\\') {
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86 break;
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87 }
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88 }
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89 if (_buffer[_cursor] != quote) {
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90 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
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91 "Format error in diagnostic command arguments", false);
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92 }
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93 break;
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94 }
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95 _cursor++;
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96 }
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97 _key_len = &_buffer[_cursor] - _key_addr;
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98 // check if the argument has the <key>=<value> format
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99 if (_cursor <= _len -1 && _buffer[_cursor] == '=') {
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100 _cursor++;
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101 _value_addr = &_buffer[_cursor];
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102 // extract the value
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103 while (_cursor <= _len - 1 && _buffer[_cursor] != _delim) {
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104 // value can be surrounded by simple or double quotes
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105 if (_buffer[_cursor] == '\"' || _buffer[_cursor] == '\'') {
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106 _value_addr++;
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107 char quote = _buffer[_cursor];
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108 while (_cursor < _len - 1) {
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109 _cursor++;
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110 if (_buffer[_cursor] == quote && _buffer[_cursor - 1] != '\\') {
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111 break;
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112 }
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113 }
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114 if (_buffer[_cursor] != quote) {
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115 THROW_MSG_(vmSymbols::java_lang_IllegalArgumentException(),
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116 "Format error in diagnostic command arguments", false);
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117 }
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118 break;
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119 }
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120 _cursor++;
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121 }
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122 _value_len = &_buffer[_cursor] - _value_addr;
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123 } else {
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124 _value_addr = NULL;
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125 _value_len = 0;
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126 }
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127 return _key_len != 0;
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128 }
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129
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130 bool DCmdInfo::by_name(void* cmd_name, DCmdInfo* info) {
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131 if (info == NULL) return false;
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132 return strcmp((const char*)cmd_name, info->name()) == 0;
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133 }
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134
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135 void DCmdParser::add_dcmd_option(GenDCmdArgument* arg) {
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136 assert(arg != NULL, "Sanity");
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137 if (_options == NULL) {
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138 _options = arg;
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139 } else {
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140 GenDCmdArgument* o = _options;
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141 while (o->next() != NULL) {
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142 o = o->next();
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143 }
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144 o->set_next(arg);
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145 }
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146 arg->set_next(NULL);
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147 Thread* THREAD = Thread::current();
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148 arg->init_value(THREAD);
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149 if (HAS_PENDING_EXCEPTION) {
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150 fatal("Initialization must be successful");
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151 }
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152 }
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153
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154 void DCmdParser::add_dcmd_argument(GenDCmdArgument* arg) {
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155 assert(arg != NULL, "Sanity");
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156 if (_arguments_list == NULL) {
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157 _arguments_list = arg;
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158 } else {
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159 GenDCmdArgument* a = _arguments_list;
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160 while (a->next() != NULL) {
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161 a = a->next();
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162 }
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163 a->set_next(arg);
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164 }
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165 arg->set_next(NULL);
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166 Thread* THREAD = Thread::current();
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167 arg->init_value(THREAD);
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168 if (HAS_PENDING_EXCEPTION) {
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169 fatal("Initialization must be successful");
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170 }
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171 }
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172
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173 void DCmdParser::parse(CmdLine* line, char delim, TRAPS) {
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174 GenDCmdArgument* next_argument = _arguments_list;
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175 DCmdArgIter iter(line->args_addr(), line->args_len(), delim);
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176 bool cont = iter.next(CHECK);
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177 while (cont) {
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178 GenDCmdArgument* arg = lookup_dcmd_option(iter.key_addr(),
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179 iter.key_length());
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180 if (arg != NULL) {
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181 arg->read_value(iter.value_addr(), iter.value_length(), CHECK);
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182 } else {
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183 if (next_argument != NULL) {
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184 arg = next_argument;
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185 arg->read_value(iter.key_addr(), iter.key_length(), CHECK);
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186 next_argument = next_argument->next();
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187 } else {
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188 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
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189 "Unknown argument in diagnostic command");
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190 }
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191 }
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192 cont = iter.next(CHECK);
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193 }
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194 check(CHECK);
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195 }
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196
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197 GenDCmdArgument* DCmdParser::lookup_dcmd_option(const char* name, size_t len) {
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198 GenDCmdArgument* arg = _options;
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199 while (arg != NULL) {
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200 if (strlen(arg->name()) == len &&
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201 strncmp(name, arg->name(), len) == 0) {
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202 return arg;
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203 }
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204 arg = arg->next();
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205 }
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206 return NULL;
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207 }
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208
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209 void DCmdParser::check(TRAPS) {
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210 GenDCmdArgument* arg = _arguments_list;
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211 while (arg != NULL) {
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212 if (arg->is_mandatory() && !arg->has_value()) {
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213 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
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214 "Missing argument for diagnostic command");
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215 }
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216 arg = arg->next();
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217 }
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218 arg = _options;
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219 while (arg != NULL) {
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220 if (arg->is_mandatory() && !arg->has_value()) {
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221 THROW_MSG(vmSymbols::java_lang_IllegalArgumentException(),
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222 "Missing option for diagnostic command");
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223 }
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224 arg = arg->next();
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225 }
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226 }
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227
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228 void DCmdParser::print_help(outputStream* out, const char* cmd_name) {
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229 out->print("\nSyntax : %s %s", cmd_name, _options == NULL ? "" : "[options]");
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230 GenDCmdArgument* arg = _arguments_list;
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231 while (arg != NULL) {
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232 if (arg->is_mandatory()) {
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233 out->print(" <%s>", arg->name());
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234 } else {
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235 out->print(" [<%s>]", arg->name());
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236 }
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237 arg = arg->next();
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238 }
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239 out->print_cr("");
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240 if (_arguments_list != NULL) {
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241 out->print_cr("\nArguments:");
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242 arg = _arguments_list;
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243 while (arg != NULL) {
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244 out->print("\t%s : %s %s (%s, ", arg->name(),
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245 arg->is_mandatory() ? "" : "[optional]",
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246 arg->description(), arg->type());
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247 if (arg->has_default()) {
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248 out->print(arg->default_string());
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249 } else {
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250 out->print("no default value");
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251 }
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252 out->print_cr(")");
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253 arg = arg->next();
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254 }
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255 }
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256 if (_options != NULL) {
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257 out->print_cr("\nOptions: (options must be specified using the <key> or <key>=<value> syntax)");
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258 arg = _options;
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259 while (arg != NULL) {
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260 out->print("\t%s : %s %s (%s, ", arg->name(),
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261 arg->is_mandatory() ? "" : "[optional]",
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262 arg->description(), arg->type());
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263 if (arg->has_default()) {
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264 out->print(arg->default_string());
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265 } else {
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266 out->print("no default value");
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267 }
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268 out->print_cr(")");
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269 arg = arg->next();
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270 }
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271 }
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272 }
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273
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274 void DCmdParser::reset(TRAPS) {
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275 GenDCmdArgument* arg = _arguments_list;
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276 while (arg != NULL) {
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277 arg->reset(CHECK);
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278 arg = arg->next();
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279 }
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280 arg = _options;
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281 while (arg != NULL) {
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282 arg->reset(CHECK);
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283 arg = arg->next();
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284 }
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285 }
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286
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287 void DCmdParser::cleanup() {
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288 GenDCmdArgument* arg = _arguments_list;
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289 while (arg != NULL) {
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290 arg->cleanup();
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291 arg = arg->next();
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292 }
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293 arg = _options;
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294 while (arg != NULL) {
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295 arg->cleanup();
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296 arg = arg->next();
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297 }
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298 }
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299
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300 int DCmdParser::num_arguments() {
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301 GenDCmdArgument* arg = _arguments_list;
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302 int count = 0;
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303 while (arg != NULL) {
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304 count++;
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305 arg = arg->next();
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306 }
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307 arg = _options;
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308 while (arg != NULL) {
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309 count++;
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310 arg = arg->next();
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311 }
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312 return count;
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313 }
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314
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315 GrowableArray<const char *>* DCmdParser::argument_name_array() {
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316 int count = num_arguments();
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317 GrowableArray<const char *>* array = new GrowableArray<const char *>(count);
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318 GenDCmdArgument* arg = _arguments_list;
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319 while (arg != NULL) {
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320 array->append(arg->name());
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321 arg = arg->next();
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322 }
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323 arg = _options;
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324 while (arg != NULL) {
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325 array->append(arg->name());
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326 arg = arg->next();
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327 }
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328 return array;
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329 }
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330
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331 GrowableArray<DCmdArgumentInfo*>* DCmdParser::argument_info_array() {
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332 int count = num_arguments();
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333 GrowableArray<DCmdArgumentInfo*>* array = new GrowableArray<DCmdArgumentInfo *>(count);
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334 int idx = 0;
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335 GenDCmdArgument* arg = _arguments_list;
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336 while (arg != NULL) {
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337 array->append(new DCmdArgumentInfo(arg->name(), arg->description(),
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338 arg->type(), arg->default_string(), arg->is_mandatory(),
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339 false, idx));
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340 idx++;
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341 arg = arg->next();
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342 }
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343 arg = _options;
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344 while (arg != NULL) {
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345 array->append(new DCmdArgumentInfo(arg->name(), arg->description(),
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346 arg->type(), arg->default_string(), arg->is_mandatory(),
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347 true));
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348 arg = arg->next();
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349 }
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350 return array;
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351 }
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352
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353 DCmdFactory* DCmdFactory::_DCmdFactoryList = NULL;
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354
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355 void DCmd::parse_and_execute(outputStream* out, const char* cmdline,
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356 char delim, TRAPS) {
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357
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358 if (cmdline == NULL) return; // Nothing to do!
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359 DCmdIter iter(cmdline, '\n');
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360
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361 while (iter.has_next()) {
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362 CmdLine line = iter.next();
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363 if (line.is_stop()) {
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364 break;
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365 }
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366 if (line.is_executable()) {
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367 DCmd* command = DCmdFactory::create_local_DCmd(line, out, CHECK);
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368 assert(command != NULL, "command error must be handled before this line");
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369 DCmdMark mark(command);
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370 command->parse(&line, delim, CHECK);
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371 command->execute(CHECK);
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372 }
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373 }
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374 }
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375
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376 Mutex* DCmdFactory::_dcmdFactory_lock = new Mutex(Mutex::leaf, "DCmdFactory", true);
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377
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378 DCmdFactory* DCmdFactory::factory(const char* name, size_t len) {
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379 MutexLockerEx ml(_dcmdFactory_lock, Mutex::_no_safepoint_check_flag);
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380 DCmdFactory* factory = _DCmdFactoryList;
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381 while (factory != NULL) {
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382 if (strlen(factory->name()) == len &&
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383 strncmp(name, factory->name(), len) == 0) {
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384 return factory;
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385 }
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386 factory = factory->_next;
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387 }
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388 return NULL;
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389 }
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390
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391 int DCmdFactory::register_DCmdFactory(DCmdFactory* factory) {
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392 MutexLockerEx ml(_dcmdFactory_lock, Mutex::_no_safepoint_check_flag);
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393 factory->_next = _DCmdFactoryList;
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394 _DCmdFactoryList = factory;
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395 return 0; // Actually, there's no checks for duplicates
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396 }
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397
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398 DCmd* DCmdFactory::create_global_DCmd(CmdLine &line, outputStream* out, TRAPS) {
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399 DCmdFactory* f = factory(line.cmd_addr(), line.cmd_len());
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400 if (f != NULL) {
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401 if (f->is_enabled()) {
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402 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(),
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403 f->disabled_message());
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404 }
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405 return f->create_Cheap_instance(out);
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406 }
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407 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(),
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408 "Unknown diagnostic command");
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409 }
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410
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411 DCmd* DCmdFactory::create_local_DCmd(CmdLine &line, outputStream* out, TRAPS) {
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412 DCmdFactory* f = factory(line.cmd_addr(), line.cmd_len());
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413 if (f != NULL) {
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414 if (!f->is_enabled()) {
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415 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(),
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416 f->disabled_message());
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417 }
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418 return f->create_resource_instance(out);
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419 }
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420 THROW_MSG_NULL(vmSymbols::java_lang_IllegalArgumentException(),
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421 "Unknown diagnostic command");
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422 }
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423
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424 GrowableArray<const char*>* DCmdFactory::DCmd_list() {
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425 MutexLockerEx ml(_dcmdFactory_lock, Mutex::_no_safepoint_check_flag);
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426 GrowableArray<const char*>* array = new GrowableArray<const char*>();
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427 DCmdFactory* factory = _DCmdFactoryList;
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428 while (factory != NULL) {
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429 if (!factory->is_hidden()) {
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430 array->append(factory->name());
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431 }
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432 factory = factory->next();
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433 }
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434 return array;
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|
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435 }
|
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436
|
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437 GrowableArray<DCmdInfo*>* DCmdFactory::DCmdInfo_list() {
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|
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438 MutexLockerEx ml(_dcmdFactory_lock, Mutex::_no_safepoint_check_flag);
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|
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439 GrowableArray<DCmdInfo*>* array = new GrowableArray<DCmdInfo*>();
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440 DCmdFactory* factory = _DCmdFactoryList;
|
|
|
441 while (factory != NULL) {
|
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442 if (!factory->is_hidden()) {
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443 array->append(new DCmdInfo(factory->name(),
|
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444 factory->description(), factory->impact(),
|
|
|
445 factory->num_arguments(), factory->is_enabled()));
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|
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446 }
|
|
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447 factory = factory->next();
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|
|
448 }
|
|
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449 return array;
|
|
|
450 }
|
