author | jcbeyler |
Wed, 12 Sep 2018 10:27:03 -0700 | |
changeset 51715 | 13a63d4a3f8d |
parent 51551 | e409244ce72e |
child 51870 | cdfabab3413f |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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|
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#include <stdio.h> |
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#include <string.h> |
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#include <jvmti.h> |
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#include "jni_tools.h" |
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#include "agent_common.h" |
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#include "JVMTITools.h" |
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extern "C" { |
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#define STATUS_FAILED 2 |
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#define PASSED 0 |
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#define NO_RESULTS 3 |
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/* expected values of new instance fields */ |
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static jint INTFLD = 333; |
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static jlong LONGFLD = 444; |
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#define STRFLD "completely new String field" |
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static jvmtiEnv *jvmti = NULL; |
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static jvmtiCapabilities caps; |
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#ifdef STATIC_BUILD |
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JNIEXPORT jint JNICALL Agent_OnLoad_redefclass004(JavaVM *jvm, char *options, void *reserved) { |
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return Agent_Initialize(jvm, options, reserved); |
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} |
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JNIEXPORT jint JNICALL Agent_OnAttach_redefclass004(JavaVM *jvm, char *options, void *reserved) { |
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return Agent_Initialize(jvm, options, reserved); |
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} |
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JNIEXPORT jint JNI_OnLoad_redefclass004(JavaVM *jvm, char *options, void *reserved) { |
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return JNI_VERSION_1_8; |
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} |
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#endif |
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jint Agent_Initialize(JavaVM *vm, char *options, void *reserved) { |
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jint res; |
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jvmtiError err; |
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if ((res = vm->GetEnv((void **) &jvmti, JVMTI_VERSION_1_1)) != JNI_OK) { |
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printf("%s: Failed to call GetEnv: error=%d\n", __FILE__, res); |
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return JNI_ERR; |
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} |
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err = jvmti->GetPotentialCapabilities(&caps); |
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if (err != JVMTI_ERROR_NONE) { |
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printf("(GetPotentialCapabilities) unexpected error: %s (%d)\n", |
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TranslateError(err), err); |
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return JNI_ERR; |
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} |
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err = jvmti->AddCapabilities(&caps); |
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if (err != JVMTI_ERROR_NONE) { |
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printf("(AddCapabilities) unexpected error: %s (%d)\n", |
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TranslateError(err), err); |
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return JNI_ERR; |
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} |
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err = jvmti->GetCapabilities(&caps); |
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if (err != JVMTI_ERROR_NONE) { |
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printf("(GetCapabilities) unexpected error: %s (%d)\n", |
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TranslateError(err), err); |
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return JNI_ERR; |
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} |
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if (!caps.can_redefine_classes) { |
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printf("Warning: RedefineClasses is not implemented\n"); |
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} |
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return JNI_OK; |
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} |
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JNIEXPORT jint JNICALL |
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Java_nsk_jvmti_RedefineClasses_redefclass004_makeRedefinition(JNIEnv *env, |
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jclass cls, jint vrb, jclass redefCls, jbyteArray classBytes) { |
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jvmtiError err; |
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jvmtiClassDefinition classDef; |
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int no_results = 0; |
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if (jvmti == NULL) { |
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printf("JVMTI client was not properly loaded!\n"); |
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return STATUS_FAILED; |
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} |
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if (!caps.can_redefine_classes) { |
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return PASSED; |
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} |
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/* fill the structure jvmtiClassDefinition */ |
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classDef.klass = redefCls; |
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classDef.class_byte_count = env->GetArrayLength(classBytes); |
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classDef.class_bytes = (unsigned char *) env->GetByteArrayElements(classBytes, NULL); |
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if (vrb == 1) |
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printf(">>>>>>>> Invoke RedefineClasses():\n\tnew class byte count=%d\n", |
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classDef.class_byte_count); |
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if ((err = (jvmti->RedefineClasses(1, &classDef))) != JVMTI_ERROR_NONE) { |
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if (err == JVMTI_ERROR_UNSUPPORTED_REDEFINITION_SCHEMA_CHANGED) { |
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printf("Warning: unrestrictedly redefinition of classes is not implemented,\n\ |
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\tso the test has no results.\n"); |
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no_results = 1; |
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123 |
} |
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else { |
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printf("%s: Failed to call RedefineClasses():\n\tthe function returned error %d: %s\n", |
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__FILE__, err, TranslateError(err)); |
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printf("\tFor more info about this error see the JVMTI spec.\n"); |
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128 |
} |
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if (no_results == 1) return NO_RESULTS; |
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130 |
else return JNI_ERR; |
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131 |
} |
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if (vrb == 1) |
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printf("<<<<<<<< RedefineClasses() is successfully done\n"); |
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134 |
|
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135 |
return PASSED; |
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136 |
} |
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137 |
|
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138 |
JNIEXPORT jint JNICALL |
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139 |
Java_nsk_jvmti_RedefineClasses_redefclass004_checkNewFields(JNIEnv *env, |
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140 |
jobject obj, jint vrb, jobject redefObj) { |
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jclass redefCls = env->GetObjectClass(redefObj); |
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142 |
jfieldID fid; |
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143 |
jint intFld; |
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144 |
jlong longFld; |
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145 |
jstring stringObj; |
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const char *strFld = NULL; |
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147 |
|
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/* get value of new instance field "intComplNewFld" */ |
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if ((fid = env->GetFieldID(redefCls, "intComplNewFld", "I")) == NULL) { |
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printf("%s: Failed to get the field ID for the field \"intComplNewFld\"\n", |
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151 |
__FILE__); |
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152 |
return STATUS_FAILED; |
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153 |
} |
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intFld = env->GetIntField(redefObj, fid); |
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155 |
|
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156 |
/* get value of new instance field "longComplNewFld" */ |
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157 |
if ((fid = env->GetFieldID(redefCls, "longComplNewFld", "J")) == NULL) { |
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printf("%s: Failed to get the field ID for the field \"longComplNewFld\"\n", |
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159 |
__FILE__); |
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160 |
return STATUS_FAILED; |
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161 |
} |
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longFld = env->GetLongField(redefObj, fid); |
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163 |
|
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164 |
/* get value of new instance field "stringComplNewFld" */ |
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if ((fid = env->GetFieldID(redefCls, "stringComplNewFld", "Ljava/lang/String;")) == NULL) { |
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printf("%s: Failed to get the field ID for the field \"stringComplNewFld\"\n", |
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167 |
__FILE__); |
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168 |
return STATUS_FAILED; |
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169 |
} |
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stringObj = (jstring) env->GetObjectField(redefObj, fid); |
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171 |
strFld = env->GetStringUTFChars(stringObj, 0); |
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172 |
|
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173 |
if (intFld != INTFLD || longFld != LONGFLD || |
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174 |
strcmp(strFld, STRFLD) != 0) { |
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175 |
printf("Completely new fields have not assigned their default values:\n"); |
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176 |
printf("\tintComplNewFld = %d,\texpected %d\n", |
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177 |
intFld, INTFLD); |
51551 | 178 |
printf("\tlongComplNewFld = %" LL "d", longFld); |
179 |
printf(",\texpected %" LL "d\n", LONGFLD); |
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printf("\tstringComplNewFld = \"%s\",\texpected \"%s\"\n", |
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strFld, STRFLD); |
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env->ReleaseStringUTFChars(stringObj, strFld); |
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183 |
return STATUS_FAILED; |
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184 |
} else { |
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185 |
if (vrb == 1) |
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186 |
printf("Completely new fields:\n\ |
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187 |
\tstringComplNewFld = \"%s\"\n\tintComplNewFld = %d\n\ |
51551 | 188 |
\tlongComplNewFld = %" LL "d\n", |
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189 |
strFld, intFld, longFld); |
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190 |
env->ReleaseStringUTFChars(stringObj, strFld); |
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191 |
return PASSED; |
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192 |
} |
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193 |
} |
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194 |
|
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195 |
} |