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1 /* |
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2 * Copyright (c) 2003, 2018, 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 #include <stdio.h> |
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25 #include <string.h> |
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26 #include "jvmti.h" |
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27 #include "agent_common.h" |
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28 #include "JVMTITools.h" |
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29 |
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30 #ifdef __cplusplus |
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31 extern "C" { |
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32 #endif |
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33 |
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34 #ifndef JNI_ENV_ARG |
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35 |
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36 #ifdef __cplusplus |
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37 #define JNI_ENV_ARG(x, y) y |
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38 #define JNI_ENV_PTR(x) x |
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39 #else |
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40 #define JNI_ENV_ARG(x,y) x, y |
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41 #define JNI_ENV_PTR(x) (*x) |
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42 #endif |
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43 |
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44 #endif |
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45 |
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46 #define PASSED 0 |
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47 #define STATUS_FAILED 2 |
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48 |
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49 static jvmtiEnv *jvmti; |
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50 static jvmtiEventCallbacks callbacks; |
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51 static jvmtiCapabilities caps; |
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52 static jint result = PASSED; |
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53 |
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54 void JNICALL FieldModification(jvmtiEnv *jvmti_env, JNIEnv *env, |
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55 jthread thd, jmethodID mid, jlocation loc, |
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56 jclass field_klass, jobject obj, jfieldID field, |
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57 char sig, jvalue new_value) { |
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58 } |
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59 |
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60 #ifdef STATIC_BUILD |
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61 JNIEXPORT jint JNICALL Agent_OnLoad_clrfmodw002(JavaVM *jvm, char *options, void *reserved) { |
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62 return Agent_Initialize(jvm, options, reserved); |
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63 } |
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64 JNIEXPORT jint JNICALL Agent_OnAttach_clrfmodw002(JavaVM *jvm, char *options, void *reserved) { |
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65 return Agent_Initialize(jvm, options, reserved); |
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66 } |
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67 JNIEXPORT jint JNI_OnLoad_clrfmodw002(JavaVM *jvm, char *options, void *reserved) { |
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68 return JNI_VERSION_1_8; |
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69 } |
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70 #endif |
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71 jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) { |
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72 jint res; |
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73 jvmtiError err; |
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74 |
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75 res = JNI_ENV_PTR(jvm)->GetEnv(JNI_ENV_ARG(jvm, (void **) &jvmti), |
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76 JVMTI_VERSION_1_1); |
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77 if (res != JNI_OK || jvmti == NULL) { |
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78 printf("Wrong result of a valid call to GetEnv !\n"); |
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79 return JNI_ERR; |
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80 } |
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81 |
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82 err = jvmti->GetPotentialCapabilities(&caps); |
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83 if (err != JVMTI_ERROR_NONE) { |
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84 printf("(GetPotentialCapabilities) unexpected error: %s (%d)\n", |
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85 TranslateError(err), err); |
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86 return JNI_ERR; |
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87 } |
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88 |
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89 err = jvmti->AddCapabilities(&caps); |
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90 if (err != JVMTI_ERROR_NONE) { |
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91 printf("(AddCapabilities) unexpected error: %s (%d)\n", |
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92 TranslateError(err), err); |
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93 return JNI_ERR; |
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94 } |
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95 |
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96 err = jvmti->GetCapabilities(&caps); |
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97 if (err != JVMTI_ERROR_NONE) { |
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98 printf("(GetCapabilities) unexpected error: %s (%d)\n", |
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99 TranslateError(err), err); |
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100 return JNI_ERR; |
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101 } |
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102 |
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103 if (caps.can_generate_field_modification_events) { |
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104 callbacks.FieldModification = &FieldModification; |
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105 err = jvmti->SetEventCallbacks(&callbacks, sizeof(callbacks)); |
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106 if (err != JVMTI_ERROR_NONE) { |
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107 printf("(SetEventCallbacks) unexpected error: %s (%d)\n", |
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108 TranslateError(err), err); |
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109 return JNI_ERR; |
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110 } |
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111 |
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112 err = jvmti->SetEventNotificationMode(JVMTI_ENABLE, |
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113 JVMTI_EVENT_FIELD_MODIFICATION, NULL); |
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114 if (err != JVMTI_ERROR_NONE) { |
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115 printf("Failed to enable JVMTI_EVENT_FIELD_MODIFICATION: %s (%d)\n", |
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116 TranslateError(err), err); |
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117 return JNI_ERR; |
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118 } |
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119 } else { |
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120 printf("Warning: FieldModification watch is not implemented\n"); |
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121 } |
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122 |
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123 return JNI_OK; |
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124 } |
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125 |
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126 JNIEXPORT void JNICALL |
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127 Java_nsk_jvmti_ClearFieldModificationWatch_clrfmodw002_check(JNIEnv *env, |
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128 jclass cls) { |
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129 jvmtiError err; |
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130 jfieldID fid1, fid2; |
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131 |
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132 fid1 = JNI_ENV_PTR(env)->GetStaticFieldID(JNI_ENV_ARG(env, cls), |
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133 "fld1", "I"); |
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134 fid2 = JNI_ENV_PTR(env)->GetStaticFieldID(JNI_ENV_ARG(env, cls), |
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135 "fld2", "I"); |
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136 |
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137 if (!caps.can_generate_field_modification_events) { |
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138 printf("Warning: ClearFieldModificationWatch is not implemented\n"); |
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139 err = jvmti->ClearFieldModificationWatch(cls, fid1); |
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140 if (err != JVMTI_ERROR_MUST_POSSESS_CAPABILITY) { |
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141 result = STATUS_FAILED; |
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142 printf("Failed to return MUST_POSSESS_CAPABILITY: %s (%d)\n", |
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143 TranslateError(err), err); |
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144 } |
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145 } else { |
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146 err = jvmti->ClearFieldModificationWatch(NULL, fid2); |
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147 if (err != JVMTI_ERROR_INVALID_CLASS) { |
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148 result = STATUS_FAILED; |
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149 printf("Failed to return JVMTI_ERROR_INVALID_CLASS: %s (%d)\n", |
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150 TranslateError(err), err); |
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151 } |
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152 |
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153 err = jvmti->ClearFieldModificationWatch(cls, NULL); |
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154 if (err != JVMTI_ERROR_INVALID_FIELDID) { |
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155 result = STATUS_FAILED; |
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156 printf("Failed to return INVALID_FIELDID: %s (%d)\n", |
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157 TranslateError(err), err); |
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158 } |
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159 |
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160 err = jvmti->ClearFieldModificationWatch(cls, fid2); |
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161 if (err != JVMTI_ERROR_NOT_FOUND) { |
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162 result = STATUS_FAILED; |
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163 printf("Failed to return NOT_FOUND: %s (%d)\n", |
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164 TranslateError(err), err); |
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165 } |
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166 } |
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167 } |
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168 |
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169 JNIEXPORT jint JNICALL |
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170 Java_nsk_jvmti_ClearFieldModificationWatch_clrfmodw002_getRes(JNIEnv *env, |
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171 jclass cls) { |
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172 return result; |
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173 } |
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174 |
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175 #ifdef __cplusplus |
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176 } |
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177 #endif |