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1 /*
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2 * Copyright 2003 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 # include "incls/_precompiled.incl"
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26 # include "incls/_jvmtiExtensions.cpp.incl"
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27
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28 // the list of extension functions
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29 GrowableArray<jvmtiExtensionFunctionInfo*>* JvmtiExtensions::_ext_functions;
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30
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31 // the list of extension events
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32 GrowableArray<jvmtiExtensionEventInfo*>* JvmtiExtensions::_ext_events;
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33
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34
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35 // extension function
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36 static jvmtiError JNICALL IsClassUnloadingEnabled(const jvmtiEnv* env, jboolean* enabled, ...) {
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37 if (enabled == NULL) {
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38 return JVMTI_ERROR_NULL_POINTER;
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39 }
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40 *enabled = (jboolean)ClassUnloading;
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41 return JVMTI_ERROR_NONE;
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42 }
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43
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44 // register extension functions and events. In this implementation we
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45 // have a single extension function (to prove the API) that tests if class
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46 // unloading is enabled or disabled. We also have a single extension event
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47 // EXT_EVENT_CLASS_UNLOAD which is used to provide the JVMDI_EVENT_CLASS_UNLOAD
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48 // event. The function and the event are registered here.
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49 //
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50 void JvmtiExtensions::register_extensions() {
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51 _ext_functions = new (ResourceObj::C_HEAP) GrowableArray<jvmtiExtensionFunctionInfo*>(1,true);
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52 _ext_events = new (ResourceObj::C_HEAP) GrowableArray<jvmtiExtensionEventInfo*>(1,true);
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53
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54 // register our extension function
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55 static jvmtiParamInfo func_params[] = {
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56 { (char*)"IsClassUnloadingEnabled", JVMTI_KIND_OUT, JVMTI_TYPE_JBOOLEAN, JNI_FALSE }
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57 };
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58 static jvmtiExtensionFunctionInfo ext_func = {
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59 (jvmtiExtensionFunction)IsClassUnloadingEnabled,
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60 (char*)"com.sun.hotspot.functions.IsClassUnloadingEnabled",
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61 (char*)"Tell if class unloading is enabled (-noclassgc)",
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62 sizeof(func_params)/sizeof(func_params[0]),
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63 func_params,
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64 0, // no non-universal errors
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65 NULL
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66 };
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67 _ext_functions->append(&ext_func);
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68
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69 // register our extension event
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70
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71 static jvmtiParamInfo event_params[] = {
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72 { (char*)"JNI Environment", JVMTI_KIND_IN, JVMTI_TYPE_JNIENV, JNI_FALSE },
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73 { (char*)"Thread", JVMTI_KIND_IN, JVMTI_TYPE_JTHREAD, JNI_FALSE },
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74 { (char*)"Class", JVMTI_KIND_IN, JVMTI_TYPE_JCLASS, JNI_FALSE }
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75 };
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76 static jvmtiExtensionEventInfo ext_event = {
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77 EXT_EVENT_CLASS_UNLOAD,
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78 (char*)"com.sun.hotspot.events.ClassUnload",
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79 (char*)"CLASS_UNLOAD event",
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80 sizeof(event_params)/sizeof(event_params[0]),
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81 event_params
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82 };
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83 _ext_events->append(&ext_event);
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84 }
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85
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86
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87 // return the list of extension functions
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88
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89 jvmtiError JvmtiExtensions::get_functions(JvmtiEnv* env,
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90 jint* extension_count_ptr,
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91 jvmtiExtensionFunctionInfo** extensions)
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92 {
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93 guarantee(_ext_functions != NULL, "registration not done");
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94
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95 ResourceTracker rt(env);
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96
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97 jvmtiExtensionFunctionInfo* ext_funcs;
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98 jvmtiError err = rt.allocate(_ext_functions->length() *
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99 sizeof(jvmtiExtensionFunctionInfo),
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100 (unsigned char**)&ext_funcs);
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101 if (err != JVMTI_ERROR_NONE) {
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102 return err;
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103 }
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104
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105 for (int i=0; i<_ext_functions->length(); i++ ) {
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106 ext_funcs[i].func = _ext_functions->at(i)->func;
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107
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108 char *id = _ext_functions->at(i)->id;
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109 err = rt.allocate(strlen(id)+1, (unsigned char**)&(ext_funcs[i].id));
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110 if (err != JVMTI_ERROR_NONE) {
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111 return err;
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112 }
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113 strcpy(ext_funcs[i].id, id);
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114
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115 char *desc = _ext_functions->at(i)->short_description;
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116 err = rt.allocate(strlen(desc)+1,
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117 (unsigned char**)&(ext_funcs[i].short_description));
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118 if (err != JVMTI_ERROR_NONE) {
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119 return err;
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120 }
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121 strcpy(ext_funcs[i].short_description, desc);
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122
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123 // params
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124
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125 jint param_count = _ext_functions->at(i)->param_count;
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126
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127 ext_funcs[i].param_count = param_count;
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128 if (param_count == 0) {
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129 ext_funcs[i].params = NULL;
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130 } else {
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131 err = rt.allocate(param_count*sizeof(jvmtiParamInfo),
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132 (unsigned char**)&(ext_funcs[i].params));
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133 if (err != JVMTI_ERROR_NONE) {
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134 return err;
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135 }
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136 jvmtiParamInfo* src_params = _ext_functions->at(i)->params;
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137 jvmtiParamInfo* dst_params = ext_funcs[i].params;
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138
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139 for (int j=0; j<param_count; j++) {
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140 err = rt.allocate(strlen(src_params[j].name)+1,
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141 (unsigned char**)&(dst_params[j].name));
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142 if (err != JVMTI_ERROR_NONE) {
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143 return err;
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144 }
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145 strcpy(dst_params[j].name, src_params[j].name);
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146
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147 dst_params[j].kind = src_params[j].kind;
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148 dst_params[j].base_type = src_params[j].base_type;
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149 dst_params[j].null_ok = src_params[j].null_ok;
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150 }
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151 }
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152
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153 // errors
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154
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155 jint error_count = _ext_functions->at(i)->error_count;
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156 ext_funcs[i].error_count = error_count;
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157 if (error_count == 0) {
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158 ext_funcs[i].errors = NULL;
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159 } else {
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160 err = rt.allocate(error_count*sizeof(jvmtiError),
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161 (unsigned char**)&(ext_funcs[i].errors));
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162 if (err != JVMTI_ERROR_NONE) {
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163 return err;
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164 }
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165 memcpy(ext_funcs[i].errors, _ext_functions->at(i)->errors,
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166 error_count*sizeof(jvmtiError));
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167 }
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168 }
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169
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170 *extension_count_ptr = _ext_functions->length();
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171 *extensions = ext_funcs;
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172 return JVMTI_ERROR_NONE;
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173 }
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174
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175
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176 // return the list of extension events
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177
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178 jvmtiError JvmtiExtensions::get_events(JvmtiEnv* env,
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179 jint* extension_count_ptr,
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180 jvmtiExtensionEventInfo** extensions)
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181 {
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182 guarantee(_ext_events != NULL, "registration not done");
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183
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184 ResourceTracker rt(env);
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185
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186 jvmtiExtensionEventInfo* ext_events;
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187 jvmtiError err = rt.allocate(_ext_events->length() * sizeof(jvmtiExtensionEventInfo),
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188 (unsigned char**)&ext_events);
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189 if (err != JVMTI_ERROR_NONE) {
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190 return err;
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191 }
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192
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193 for (int i=0; i<_ext_events->length(); i++ ) {
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194 ext_events[i].extension_event_index = _ext_events->at(i)->extension_event_index;
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195
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196 char *id = _ext_events->at(i)->id;
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197 err = rt.allocate(strlen(id)+1, (unsigned char**)&(ext_events[i].id));
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198 if (err != JVMTI_ERROR_NONE) {
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199 return err;
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200 }
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201 strcpy(ext_events[i].id, id);
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202
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203 char *desc = _ext_events->at(i)->short_description;
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204 err = rt.allocate(strlen(desc)+1,
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205 (unsigned char**)&(ext_events[i].short_description));
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206 if (err != JVMTI_ERROR_NONE) {
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207 return err;
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208 }
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209 strcpy(ext_events[i].short_description, desc);
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210
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211 // params
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212
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213 jint param_count = _ext_events->at(i)->param_count;
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214
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215 ext_events[i].param_count = param_count;
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216 if (param_count == 0) {
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217 ext_events[i].params = NULL;
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218 } else {
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219 err = rt.allocate(param_count*sizeof(jvmtiParamInfo),
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220 (unsigned char**)&(ext_events[i].params));
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221 if (err != JVMTI_ERROR_NONE) {
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222 return err;
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223 }
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224 jvmtiParamInfo* src_params = _ext_events->at(i)->params;
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225 jvmtiParamInfo* dst_params = ext_events[i].params;
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226
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227 for (int j=0; j<param_count; j++) {
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228 err = rt.allocate(strlen(src_params[j].name)+1,
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229 (unsigned char**)&(dst_params[j].name));
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230 if (err != JVMTI_ERROR_NONE) {
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231 return err;
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232 }
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233 strcpy(dst_params[j].name, src_params[j].name);
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234
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235 dst_params[j].kind = src_params[j].kind;
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236 dst_params[j].base_type = src_params[j].base_type;
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237 dst_params[j].null_ok = src_params[j].null_ok;
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238 }
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239 }
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240 }
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241
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242 *extension_count_ptr = _ext_events->length();
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243 *extensions = ext_events;
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244 return JVMTI_ERROR_NONE;
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245 }
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246
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247 // set callback for an extension event and enable/disable it.
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248
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249 jvmtiError JvmtiExtensions::set_event_callback(JvmtiEnv* env,
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250 jint extension_event_index,
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251 jvmtiExtensionEvent callback)
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252 {
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253 guarantee(_ext_events != NULL, "registration not done");
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254
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255 jvmtiExtensionEventInfo* event = NULL;
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256
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257 // if there are extension events registered then validate that the
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258 // extension_event_index matches one of the registered events.
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259 if (_ext_events != NULL) {
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260 for (int i=0; i<_ext_events->length(); i++ ) {
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261 if (_ext_events->at(i)->extension_event_index == extension_event_index) {
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262 event = _ext_events->at(i);
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263 break;
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264 }
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265 }
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266 }
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267
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268 // invalid event index
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269 if (event == NULL) {
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270 return JVMTI_ERROR_ILLEGAL_ARGUMENT;
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271 }
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272
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273 JvmtiEventController::set_extension_event_callback(env, extension_event_index,
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274 callback);
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275
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276 return JVMTI_ERROR_NONE;
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277 }
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