author | iignatyev |
Tue, 28 Aug 2018 14:37:34 -0700 | |
changeset 51551 | e409244ce72e |
parent 50260 | test/hotspot/jtreg/vmTestbase/nsk/jvmti/scenarios/hotswap/HS203/hs203t003/hs203t003.c@46c67f5e27c2 |
child 51774 | 79dc492c00ab |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2007, 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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#include <stdio.h> |
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#include <stdlib.h> |
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#include <jvmti.h> |
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#include "agent_common.h" |
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#include <jni.h> |
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#include <string.h> |
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#include "jvmti_tools.h" |
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#include "jni_tools.h" |
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#include "JVMTITools.h" |
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/* |
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hs203T003: |
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1. Set FieldAccessWatch, FieldModificatoinWatch for a field. |
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2. Upon access/modification of the field within a method, redefine |
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a class with the changed field version, and pop a currently executed |
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frame within FieldAccess/FieldModification callback. |
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*/ |
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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#define DIR_NAME "newclass" |
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#define PATH_FORMAT "%s%02d/%s" |
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#define FILE_NAME "nsk/jvmti/scenarios/hotswap/HS203/hs203t003/MyThread" |
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#define CLASS_NAME "Lnsk/jvmti/scenarios/hotswap/HS203/hs203t003/MyThread;" |
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#define SEARCH_NAME "nsk/jvmti/scenarios/hotswap/HS203/hs203t003/MyThread" |
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#define FIELDNAME "threadState" |
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#define TYPE "I" |
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static jint redefineNumber; |
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static jvmtiEnv * jvmti; |
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static int redefineCnt=0; |
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JNIEXPORT void JNICALL callbackClassPrepare(jvmtiEnv *jvmti_env, |
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JNIEnv* jni, |
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jthread thread, |
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jclass klass) { |
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char * className; |
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char * generic; |
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redefineNumber=0; |
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className=NULL; |
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generic=NULL; |
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if ( ! NSK_JVMTI_VERIFY ( NSK_CPP_STUB4(GetClassSignature, |
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jvmti_env, klass, &className, &generic) ) ) { |
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nsk_printf("#error Agent :: while getting classname Signature.\n"); |
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nsk_jvmti_agentFailed(); |
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} else { |
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if (strcmp(className,CLASS_NAME) == 0) { |
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jfieldID field; |
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/* get the field id and set watch on that .*/ |
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if (! NSK_JNI_VERIFY(jni, (field = NSK_CPP_STUB4(GetFieldID, |
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jni, klass, FIELDNAME, TYPE)) != NULL) ) { |
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nsk_printf(" Agent :: (*JNI)->GetFieldID(jni, ... ) returns `null`.\n"); |
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nsk_jvmti_agentFailed(); |
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} else if ( ! NSK_JVMTI_VERIFY(NSK_CPP_STUB3(SetFieldAccessWatch, |
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jvmti_env, klass, field) ) ) { |
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nsk_printf("#error Agent :: occured while jvmti->SetFieldAccessWatch(... ) .\n"); |
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nsk_jvmti_agentFailed(); |
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} |
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} |
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} |
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} |
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JNIEXPORT void JNICALL callbackFieldAccess(jvmtiEnv *jvmti_env, |
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JNIEnv* jni, |
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jthread thread, |
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jmethodID method, |
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jlocation location, |
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jclass field_klass, |
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jobject object, |
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jfieldID field) { |
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jclass clas; |
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char fileName[512]; |
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if (redefineCnt < 10) { |
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redefineCnt++; |
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return; |
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} |
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redefineNumber=0; |
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if (! NSK_JNI_VERIFY(jni, (clas = NSK_CPP_STUB2(FindClass, jni, SEARCH_NAME)) != NULL) ) { |
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nsk_printf(" Agent :: (*JNI)->FindClass(jni, %s) returns `null`.\n",SEARCH_NAME); |
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nsk_jvmti_agentFailed(); |
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} else { |
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nsk_jvmti_getFileName(redefineNumber, FILE_NAME, fileName, |
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sizeof(fileName)/sizeof(char)); |
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if ( nsk_jvmti_redefineClass(jvmti_env, clas, fileName ) != NSK_TRUE) { |
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nsk_printf(" Agent :: Failed to redefine.\n"); |
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nsk_jvmti_agentFailed(); |
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} else { |
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nsk_printf(" Agent :: Redefined.\n"); |
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nsk_printf(" Agent :: Suspendeding thread.\n"); |
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/* pop the current working frame. */ |
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if ( ! NSK_JVMTI_VERIFY( NSK_CPP_STUB2(SuspendThread, jvmti_env, thread) ) ) { |
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nsk_printf("#error Agent :: occured suspending Thread.\n"); |
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nsk_jvmti_agentFailed(); |
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} else { |
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nsk_printf(" Agent :: Succeded in suspending.\n"); |
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119 |
} |
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120 |
} |
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121 |
} |
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122 |
} |
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123 |
|
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124 |
#ifdef STATIC_BUILD |
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JNIEXPORT jint JNICALL Agent_OnLoad_hs203t003(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_hs203t003(JavaVM *jvm, char *options, void *reserved) { |
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return Agent_Initialize(jvm, options, reserved); |
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130 |
} |
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JNIEXPORT jint JNI_OnLoad_hs203t003(JavaVM *jvm, char *options, void *reserved) { |
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return JNI_VERSION_1_8; |
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133 |
} |
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134 |
#endif |
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135 |
jint Agent_Initialize(JavaVM *vm, char *options, void *reserved) { |
51551 | 136 |
if ( ! NSK_VERIFY ( JNI_OK == NSK_CPP_STUB3(GetEnv, vm, |
50260
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(void **)&jvmti, JVMTI_VERSION_1_1) ) ) { |
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nsk_printf(" Agent :: Could not load JVMTI interface.\n"); |
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139 |
return JNI_ERR; |
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140 |
} else { |
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141 |
jvmtiCapabilities caps; |
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jvmtiEventCallbacks eventCallbacks; |
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143 |
if (nsk_jvmti_parseOptions(options) == NSK_FALSE ) { |
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nsk_printf("#error Agent :: Failed to parse options.\n"); |
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145 |
return JNI_ERR; |
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146 |
} |
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memset(&caps, 0, sizeof(caps)); |
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caps.can_redefine_classes = 1; |
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caps.can_suspend=1; |
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caps.can_pop_frame=1; |
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caps.can_generate_all_class_hook_events=1; |
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caps.can_generate_field_access_events=1; |
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153 |
if (! NSK_JVMTI_VERIFY ( NSK_CPP_STUB2(AddCapabilities, jvmti, &caps) )) { |
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154 |
nsk_printf("#error Agent :: while adding capabilities.\n"); |
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155 |
return JNI_ERR; |
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156 |
} |
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157 |
memset(&eventCallbacks, 0, sizeof(eventCallbacks)); |
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eventCallbacks.ClassPrepare =callbackClassPrepare; |
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159 |
eventCallbacks.FieldAccess= callbackFieldAccess; |
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160 |
if (!NSK_JVMTI_VERIFY( |
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161 |
NSK_CPP_STUB3(SetEventCallbacks, jvmti, |
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162 |
&eventCallbacks, sizeof(eventCallbacks)))) { |
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163 |
nsk_printf("#error Agent :: while setting event callbacks.\n"); |
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164 |
return JNI_ERR; |
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165 |
} |
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166 |
if ( ( nsk_jvmti_enableNotification(jvmti,JVMTI_EVENT_CLASS_PREPARE, NULL) |
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167 |
== NSK_TRUE ) && |
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168 |
( nsk_jvmti_enableNotification(jvmti,JVMTI_EVENT_FIELD_ACCESS, NULL) |
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169 |
== NSK_TRUE ) ) { |
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170 |
nsk_printf(" Agent :: Notifications are enabled.\n"); |
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171 |
} else { |
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172 |
nsk_printf("#error Agent :: Eanableing Notifications.\n"); |
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173 |
return JNI_ERR; |
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174 |
} |
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175 |
} |
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176 |
return JNI_OK; |
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177 |
} |
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178 |
|
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179 |
|
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180 |
JNIEXPORT jboolean JNICALL |
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181 |
Java_nsk_jvmti_scenarios_hotswap_HS203_hs203t003_hs203t003_popThreadFrame(JNIEnv * jni, |
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182 |
jclass clas, |
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183 |
jthread thread) { |
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184 |
jboolean retvalue; |
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185 |
jint state; |
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186 |
retvalue = JNI_FALSE; |
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187 |
if ( ! NSK_JVMTI_VERIFY( NSK_CPP_STUB3(GetThreadState, jvmti, thread, &state) ) ) { |
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188 |
nsk_printf(" Agent :: Error while getting thread state.\n"); |
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189 |
nsk_jvmti_agentFailed(); |
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190 |
} else { |
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191 |
if ( state & JVMTI_THREAD_STATE_SUSPENDED) { |
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192 |
if ( ! NSK_JVMTI_VERIFY ( NSK_CPP_STUB2( PopFrame, jvmti, thread) ) ) { |
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193 |
nsk_printf("#error Agent :: while poping thread's frame.\n"); |
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194 |
nsk_jvmti_agentFailed(); |
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195 |
} else { |
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196 |
nsk_printf(" Agent :: poped thread frame.\n"); |
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197 |
if ( ! NSK_JVMTI_VERIFY ( NSK_CPP_STUB4 (SetEventNotificationMode, jvmti, |
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198 |
JVMTI_DISABLE, JVMTI_EVENT_FIELD_ACCESS, NULL) ) ) { |
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199 |
nsk_printf("#error Agent :: failed to disable notification JVMTI_EVENT_FIELD ACCESS.\n"); |
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200 |
nsk_jvmti_agentFailed(); |
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201 |
} else { |
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202 |
nsk_printf(" Agent :: Disabled notification JVMTI_EVENT_FIELD ACCESS. \n"); |
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203 |
retvalue = JNI_TRUE; |
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204 |
} |
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205 |
} |
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206 |
} else { |
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207 |
nsk_printf("#error Agent :: Thread was not suspened."); |
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208 |
nsk_jvmti_agentFailed(); |
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209 |
} |
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210 |
} |
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211 |
return retvalue; |
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212 |
} |
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213 |
|
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214 |
JNIEXPORT jboolean JNICALL |
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215 |
Java_nsk_jvmti_scenarios_hotswap_HS203_hs203t003_hs203t003_resumeThread(JNIEnv * jni, |
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216 |
jclass clas, |
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217 |
jthread thread) { |
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218 |
jboolean retvalue; |
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219 |
retvalue = JNI_FALSE; |
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220 |
if ( !NSK_JVMTI_VERIFY( NSK_CPP_STUB2 ( ResumeThread, jvmti, thread)) ) { |
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221 |
nsk_printf("#error Agent :: while resuming thread.\n"); |
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222 |
nsk_jvmti_agentFailed(); |
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223 |
} else { |
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224 |
nsk_printf(" Agent :: Thread resumed.\n"); |
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225 |
retvalue= JNI_TRUE; |
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226 |
} |
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227 |
return retvalue; |
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228 |
} |
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229 |
|
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230 |
#ifdef __cplusplus |
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231 |
} |
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232 |
#endif |