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1 /* |
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2 * Copyright 2001-2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
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20 * CA 95054 USA or visit www.sun.com if you need additional information or |
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21 * have any questions. |
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22 * |
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23 */ |
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24 |
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25 /* |
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26 * Implementation of class sun.misc.Perf |
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27 */ |
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28 |
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29 #include "incls/_precompiled.incl" |
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30 #include "incls/_perf.cpp.incl" |
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31 |
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32 |
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33 #define PERF_ENTRY(result_type, header) \ |
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34 JVM_ENTRY(result_type, header) |
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35 |
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36 #define PERF_END JVM_END |
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37 |
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38 #define PerfWrapper(arg) /* Unimplemented at this time */ |
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39 |
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40 static char* jstr_to_utf(JNIEnv *env, jstring str, TRAPS) { |
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41 |
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42 char* utfstr = NULL; |
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43 |
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44 if (str == NULL) { |
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45 THROW_0(vmSymbols::java_lang_NullPointerException()); |
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46 //throw_new(env,"NullPointerException"); |
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47 } |
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48 |
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49 int len = env->GetStringUTFLength(str); |
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50 int unicode_len = env->GetStringLength(str); |
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51 |
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52 utfstr = NEW_RESOURCE_ARRAY(char, len + 1); |
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53 |
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54 env->GetStringUTFRegion(str, 0, unicode_len, utfstr); |
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55 |
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56 return utfstr; |
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57 } |
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58 |
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59 PERF_ENTRY(jobject, Perf_Attach(JNIEnv *env, jobject unused, jstring user, int vmid, int mode)) |
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60 |
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61 PerfWrapper("Perf_Attach"); |
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62 |
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63 char* address = 0; |
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64 size_t capacity = 0; |
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65 const char* user_utf = NULL; |
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66 |
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67 ResourceMark rm; |
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68 |
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69 { |
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70 ThreadToNativeFromVM ttnfv(thread); |
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71 |
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72 user_utf = user == NULL ? NULL : jstr_to_utf(env, user, CHECK_NULL); |
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73 } |
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74 |
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75 if (mode != PerfMemory::PERF_MODE_RO && |
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76 mode != PerfMemory::PERF_MODE_RW) { |
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77 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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78 } |
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79 |
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80 // attach to the PerfData memory region for the specified VM |
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81 PerfMemory::attach(user_utf, vmid, (PerfMemory::PerfMemoryMode) mode, |
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82 &address, &capacity, CHECK_NULL); |
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83 |
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84 { |
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85 ThreadToNativeFromVM ttnfv(thread); |
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86 return env->NewDirectByteBuffer(address, (jlong)capacity); |
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87 } |
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88 |
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89 PERF_END |
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90 |
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91 PERF_ENTRY(void, Perf_Detach(JNIEnv *env, jobject unused, jobject buffer)) |
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92 |
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93 PerfWrapper("Perf_Detach"); |
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94 |
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95 void* address = 0; |
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96 jlong capacity = 0; |
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97 |
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98 // get buffer address and capacity |
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99 { |
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100 ThreadToNativeFromVM ttnfv(thread); |
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101 address = env->GetDirectBufferAddress(buffer); |
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102 capacity = env->GetDirectBufferCapacity(buffer); |
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103 } |
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104 |
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105 PerfMemory::detach((char*)address, capacity, CHECK); |
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106 |
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107 PERF_END |
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108 |
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109 PERF_ENTRY(jobject, Perf_CreateLong(JNIEnv *env, jobject perf, jstring name, |
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110 int variability, int units, jlong value)) |
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111 |
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112 PerfWrapper("Perf_CreateLong"); |
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113 |
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114 char* name_utf = NULL; |
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115 |
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116 if (units <= 0 || units > PerfData::U_Last) { |
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117 debug_only(warning("unexpected units argument, units = %d", units)); |
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118 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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119 } |
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120 |
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121 ResourceMark rm; |
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122 |
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123 { |
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124 ThreadToNativeFromVM ttnfv(thread); |
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125 |
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126 name_utf = jstr_to_utf(env, name, CHECK_NULL); |
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127 } |
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128 |
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129 PerfLong* pl = NULL; |
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130 |
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131 // check that the PerfData name doesn't already exist |
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132 if (PerfDataManager::exists(name_utf)) { |
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133 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "PerfLong name already exists"); |
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134 } |
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135 |
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136 switch(variability) { |
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137 case 1: /* V_Constant */ |
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138 pl = PerfDataManager::create_long_constant(NULL_NS, (char *)name_utf, |
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139 (PerfData::Units)units, value, |
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140 CHECK_NULL); |
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141 break; |
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142 |
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143 case 2: /* V_Variable */ |
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144 pl = PerfDataManager::create_long_variable(NULL_NS, (char *)name_utf, |
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145 (PerfData::Units)units, value, |
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146 CHECK_NULL); |
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147 break; |
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148 |
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149 case 3: /* V_Monotonic Counter */ |
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150 pl = PerfDataManager::create_long_counter(NULL_NS, (char *)name_utf, |
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151 (PerfData::Units)units, value, |
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152 CHECK_NULL); |
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153 break; |
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154 |
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155 default: /* Illegal Argument */ |
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156 debug_only(warning("unexpected variability value: %d", variability)); |
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157 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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158 break; |
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159 } |
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160 |
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161 long* lp = (long*)pl->get_address(); |
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162 |
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163 { |
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164 ThreadToNativeFromVM ttnfv(thread); |
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165 return env->NewDirectByteBuffer(lp, sizeof(jlong)); |
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166 } |
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167 |
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168 PERF_END |
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169 |
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170 PERF_ENTRY(jobject, Perf_CreateByteArray(JNIEnv *env, jobject perf, |
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171 jstring name, jint variability, |
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172 jint units, jbyteArray value, |
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173 jint maxlength)) |
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174 |
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175 PerfWrapper("Perf_CreateByteArray"); |
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176 |
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177 // check for valid byte array objects |
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178 if (name == NULL || value == NULL) { |
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179 THROW_0(vmSymbols::java_lang_NullPointerException()); |
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180 } |
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181 |
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182 // check for valid variability classification |
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183 if (variability != PerfData::V_Constant && |
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184 variability != PerfData::V_Variable) { |
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185 debug_only(warning("unexpected variability value: %d", variability)); |
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186 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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187 } |
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188 |
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189 // check for valid units |
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190 if (units != PerfData::U_String) { |
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191 // only String based ByteArray objects are currently supported |
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192 debug_only(warning("unexpected units value: %d", variability)); |
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193 THROW_0(vmSymbols::java_lang_IllegalArgumentException()); |
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194 } |
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195 |
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196 int value_length; |
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197 char* name_utf = NULL; |
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198 jbyte* value_local = NULL; |
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199 |
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200 ResourceMark rm; |
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201 |
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202 { |
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203 ThreadToNativeFromVM ttnfv(thread); |
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204 |
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205 name_utf = jstr_to_utf(env, name, CHECK_NULL); |
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206 |
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207 value_length = env->GetArrayLength(value); |
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208 |
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209 value_local = NEW_RESOURCE_ARRAY(jbyte, value_length + 1); |
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210 |
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211 env->GetByteArrayRegion(value, 0, value_length, value_local); |
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212 } |
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213 |
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214 // check that the counter name doesn't already exist |
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215 if (PerfDataManager::exists((char*)name_utf)) { |
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216 THROW_MSG_0(vmSymbols::java_lang_IllegalArgumentException(), "PerfByteArray name already exists"); |
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217 } |
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218 |
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219 PerfByteArray* pbv = NULL; |
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220 |
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221 if (units == PerfData::U_String) { |
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222 |
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223 if (variability == PerfData::V_Constant) { |
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224 // create the string constant |
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225 pbv = PerfDataManager::create_string_constant(NULL_NS, (char*)name_utf, |
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226 (char*)value_local, |
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227 CHECK_NULL); |
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228 |
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229 assert(maxlength == value_length, "string constant length should be == maxlength"); |
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230 maxlength = value_length; |
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231 } |
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232 else { |
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233 |
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234 // create the string variable |
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235 pbv = PerfDataManager::create_string_variable(NULL_NS, (char*)name_utf, |
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236 maxlength, |
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237 (char*)value_local, |
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238 CHECK_NULL); |
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239 |
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240 assert(maxlength >= value_length,"string variable length should be <= maxlength"); |
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241 } |
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242 } |
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243 |
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244 char* cp = (char*)pbv->get_address(); |
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245 |
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246 { |
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247 ThreadToNativeFromVM ttnfv(thread); |
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248 return env->NewDirectByteBuffer(cp, maxlength+1); |
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249 } |
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250 |
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251 PERF_END |
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252 |
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253 PERF_ENTRY(jlong, Perf_HighResCounter(JNIEnv *env, jobject perf)) |
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254 |
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255 PerfWrapper("Perf_HighResCounter"); |
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256 |
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257 // this should be a method in java.lang.System. This value could |
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258 // be acquired through access to a PerfData performance counter, but |
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259 // doing so would require that the PerfData monitoring overhead be |
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260 // incurred by all Java applications, which is unacceptable. |
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261 |
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262 return os::elapsed_counter(); |
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263 |
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264 PERF_END |
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265 |
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266 PERF_ENTRY(jlong, Perf_HighResFrequency(JNIEnv *env, jobject perf)) |
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267 |
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268 PerfWrapper("Perf_HighResFrequency"); |
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269 |
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270 // this should be a method in java.lang.System. This value could |
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271 // be acquired through access to a PerfData performance counter, but |
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272 // doing so would require that the PerfData monitoring overhead be |
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273 // incurred by all Java applications, which is unacceptable. |
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274 |
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275 return os::elapsed_frequency(); |
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276 |
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277 PERF_END |
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278 |
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279 /// JVM_RegisterPerfMethods |
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280 |
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281 #define CC (char*) /*cast a literal from (const char*)*/ |
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282 #define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f) |
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283 #define BB "Ljava/nio/ByteBuffer;" |
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284 #define JLS "Ljava/lang/String;" |
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285 #define CL_ARGS CC"("JLS"IIJ)"BB |
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286 #define CBA_ARGS CC"("JLS"II[BI)"BB |
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287 |
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288 static JNINativeMethod perfmethods[] = { |
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289 |
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290 {CC"attach", CC"("JLS"II)"BB, FN_PTR(Perf_Attach)}, |
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291 {CC"detach", CC"("BB")V", FN_PTR(Perf_Detach)}, |
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292 {CC"createLong", CL_ARGS, FN_PTR(Perf_CreateLong)}, |
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293 {CC"createByteArray", CBA_ARGS, FN_PTR(Perf_CreateByteArray)}, |
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294 {CC"highResCounter", CC"()J", FN_PTR(Perf_HighResCounter)}, |
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295 {CC"highResFrequency", CC"()J", FN_PTR(Perf_HighResFrequency)} |
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296 }; |
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297 |
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298 #undef CBA_ARGS |
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299 #undef CL_ARGS |
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300 #undef JLS |
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301 #undef BB |
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302 #undef FN_PTR |
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303 #undef CC |
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304 |
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305 // This one function is exported, used by NativeLookup. |
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306 JVM_ENTRY(void, JVM_RegisterPerfMethods(JNIEnv *env, jclass perfclass)) |
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307 PerfWrapper("JVM_RegisterPerfMethods"); |
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308 { |
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309 ThreadToNativeFromVM ttnfv(thread); |
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310 int ok = env->RegisterNatives(perfclass, perfmethods, sizeof(perfmethods)/sizeof(JNINativeMethod)); |
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311 guarantee(ok == 0, "register perf natives"); |
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312 } |
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313 JVM_END |