--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/vmTestbase/nsk/jvmti/scenarios/hotswap/HS203/hs203t003/hs203t003.cpp Tue Aug 28 14:37:34 2018 -0700
@@ -0,0 +1,232 @@
+/*
+ * Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <jvmti.h>
+#include "agent_common.h"
+#include <jni.h>
+#include <string.h>
+#include "jvmti_tools.h"
+#include "jni_tools.h"
+#include "JVMTITools.h"
+/*
+ hs203T003:
+ 1. Set FieldAccessWatch, FieldModificatoinWatch for a field.
+ 2. Upon access/modification of the field within a method, redefine
+ a class with the changed field version, and pop a currently executed
+ frame within FieldAccess/FieldModification callback.
+
+*/
+#ifdef __cplusplus
+extern "C" {
+#endif
+#define DIR_NAME "newclass"
+#define PATH_FORMAT "%s%02d/%s"
+
+#define FILE_NAME "nsk/jvmti/scenarios/hotswap/HS203/hs203t003/MyThread"
+#define CLASS_NAME "Lnsk/jvmti/scenarios/hotswap/HS203/hs203t003/MyThread;"
+#define SEARCH_NAME "nsk/jvmti/scenarios/hotswap/HS203/hs203t003/MyThread"
+#define FIELDNAME "threadState"
+#define TYPE "I"
+
+static jint redefineNumber;
+static jvmtiEnv * jvmti;
+static int redefineCnt=0;
+
+JNIEXPORT void JNICALL callbackClassPrepare(jvmtiEnv *jvmti_env,
+ JNIEnv* jni,
+ jthread thread,
+ jclass klass) {
+ char * className;
+ char * generic;
+ redefineNumber=0;
+ className=NULL;
+ generic=NULL;
+ if ( ! NSK_JVMTI_VERIFY ( NSK_CPP_STUB4(GetClassSignature,
+ jvmti_env, klass, &className, &generic) ) ) {
+ nsk_printf("#error Agent :: while getting classname Signature.\n");
+ nsk_jvmti_agentFailed();
+ } else {
+ if (strcmp(className,CLASS_NAME) == 0) {
+ jfieldID field;
+ /* get the field id and set watch on that .*/
+ if (! NSK_JNI_VERIFY(jni, (field = NSK_CPP_STUB4(GetFieldID,
+ jni, klass, FIELDNAME, TYPE)) != NULL) ) {
+ nsk_printf(" Agent :: (*JNI)->GetFieldID(jni, ... ) returns `null`.\n");
+ nsk_jvmti_agentFailed();
+ } else if ( ! NSK_JVMTI_VERIFY(NSK_CPP_STUB3(SetFieldAccessWatch,
+ jvmti_env, klass, field) ) ) {
+ nsk_printf("#error Agent :: occured while jvmti->SetFieldAccessWatch(... ) .\n");
+ nsk_jvmti_agentFailed();
+ }
+ }
+ }
+}
+
+JNIEXPORT void JNICALL callbackFieldAccess(jvmtiEnv *jvmti_env,
+ JNIEnv* jni,
+ jthread thread,
+ jmethodID method,
+ jlocation location,
+ jclass field_klass,
+ jobject object,
+ jfieldID field) {
+ jclass clas;
+ char fileName[512];
+ if (redefineCnt < 10) {
+ redefineCnt++;
+ return;
+ }
+ redefineNumber=0;
+ if (! NSK_JNI_VERIFY(jni, (clas = NSK_CPP_STUB2(FindClass, jni, SEARCH_NAME)) != NULL) ) {
+ nsk_printf(" Agent :: (*JNI)->FindClass(jni, %s) returns `null`.\n",SEARCH_NAME);
+ nsk_jvmti_agentFailed();
+ } else {
+ nsk_jvmti_getFileName(redefineNumber, FILE_NAME, fileName,
+ sizeof(fileName)/sizeof(char));
+ if ( nsk_jvmti_redefineClass(jvmti_env, clas, fileName ) != NSK_TRUE) {
+ nsk_printf(" Agent :: Failed to redefine.\n");
+ nsk_jvmti_agentFailed();
+ } else {
+ nsk_printf(" Agent :: Redefined.\n");
+ nsk_printf(" Agent :: Suspendeding thread.\n");
+ /* pop the current working frame. */
+ if ( ! NSK_JVMTI_VERIFY( NSK_CPP_STUB2(SuspendThread, jvmti_env, thread) ) ) {
+ nsk_printf("#error Agent :: occured suspending Thread.\n");
+ nsk_jvmti_agentFailed();
+ } else {
+ nsk_printf(" Agent :: Succeded in suspending.\n");
+ }
+ }
+ }
+}
+
+#ifdef STATIC_BUILD
+JNIEXPORT jint JNICALL Agent_OnLoad_hs203t003(JavaVM *jvm, char *options, void *reserved) {
+ return Agent_Initialize(jvm, options, reserved);
+}
+JNIEXPORT jint JNICALL Agent_OnAttach_hs203t003(JavaVM *jvm, char *options, void *reserved) {
+ return Agent_Initialize(jvm, options, reserved);
+}
+JNIEXPORT jint JNI_OnLoad_hs203t003(JavaVM *jvm, char *options, void *reserved) {
+ return JNI_VERSION_1_8;
+}
+#endif
+jint Agent_Initialize(JavaVM *vm, char *options, void *reserved) {
+ if ( ! NSK_VERIFY ( JNI_OK == NSK_CPP_STUB3(GetEnv, vm,
+ (void **)&jvmti, JVMTI_VERSION_1_1) ) ) {
+ nsk_printf(" Agent :: Could not load JVMTI interface.\n");
+ return JNI_ERR;
+ } else {
+ jvmtiCapabilities caps;
+ jvmtiEventCallbacks eventCallbacks;
+ if (nsk_jvmti_parseOptions(options) == NSK_FALSE ) {
+ nsk_printf("#error Agent :: Failed to parse options.\n");
+ return JNI_ERR;
+ }
+ memset(&caps, 0, sizeof(caps));
+ caps.can_redefine_classes = 1;
+ caps.can_suspend=1;
+ caps.can_pop_frame=1;
+ caps.can_generate_all_class_hook_events=1;
+ caps.can_generate_field_access_events=1;
+ if (! NSK_JVMTI_VERIFY ( NSK_CPP_STUB2(AddCapabilities, jvmti, &caps) )) {
+ nsk_printf("#error Agent :: while adding capabilities.\n");
+ return JNI_ERR;
+ }
+ memset(&eventCallbacks, 0, sizeof(eventCallbacks));
+ eventCallbacks.ClassPrepare =callbackClassPrepare;
+ eventCallbacks.FieldAccess= callbackFieldAccess;
+ if (!NSK_JVMTI_VERIFY(
+ NSK_CPP_STUB3(SetEventCallbacks, jvmti,
+ &eventCallbacks, sizeof(eventCallbacks)))) {
+ nsk_printf("#error Agent :: while setting event callbacks.\n");
+ return JNI_ERR;
+ }
+ if ( ( nsk_jvmti_enableNotification(jvmti,JVMTI_EVENT_CLASS_PREPARE, NULL)
+ == NSK_TRUE ) &&
+ ( nsk_jvmti_enableNotification(jvmti,JVMTI_EVENT_FIELD_ACCESS, NULL)
+ == NSK_TRUE ) ) {
+ nsk_printf(" Agent :: Notifications are enabled.\n");
+ } else {
+ nsk_printf("#error Agent :: Eanableing Notifications.\n");
+ return JNI_ERR;
+ }
+ }
+ return JNI_OK;
+}
+
+
+JNIEXPORT jboolean JNICALL
+Java_nsk_jvmti_scenarios_hotswap_HS203_hs203t003_hs203t003_popThreadFrame(JNIEnv * jni,
+ jclass clas,
+ jthread thread) {
+ jboolean retvalue;
+ jint state;
+ retvalue = JNI_FALSE;
+ if ( ! NSK_JVMTI_VERIFY( NSK_CPP_STUB3(GetThreadState, jvmti, thread, &state) ) ) {
+ nsk_printf(" Agent :: Error while getting thread state.\n");
+ nsk_jvmti_agentFailed();
+ } else {
+ if ( state & JVMTI_THREAD_STATE_SUSPENDED) {
+ if ( ! NSK_JVMTI_VERIFY ( NSK_CPP_STUB2( PopFrame, jvmti, thread) ) ) {
+ nsk_printf("#error Agent :: while poping thread's frame.\n");
+ nsk_jvmti_agentFailed();
+ } else {
+ nsk_printf(" Agent :: poped thread frame.\n");
+ if ( ! NSK_JVMTI_VERIFY ( NSK_CPP_STUB4 (SetEventNotificationMode, jvmti,
+ JVMTI_DISABLE, JVMTI_EVENT_FIELD_ACCESS, NULL) ) ) {
+ nsk_printf("#error Agent :: failed to disable notification JVMTI_EVENT_FIELD ACCESS.\n");
+ nsk_jvmti_agentFailed();
+ } else {
+ nsk_printf(" Agent :: Disabled notification JVMTI_EVENT_FIELD ACCESS. \n");
+ retvalue = JNI_TRUE;
+ }
+ }
+ } else {
+ nsk_printf("#error Agent :: Thread was not suspened.");
+ nsk_jvmti_agentFailed();
+ }
+ }
+ return retvalue;
+}
+
+JNIEXPORT jboolean JNICALL
+Java_nsk_jvmti_scenarios_hotswap_HS203_hs203t003_hs203t003_resumeThread(JNIEnv * jni,
+ jclass clas,
+ jthread thread) {
+ jboolean retvalue;
+ retvalue = JNI_FALSE;
+ if ( !NSK_JVMTI_VERIFY( NSK_CPP_STUB2 ( ResumeThread, jvmti, thread)) ) {
+ nsk_printf("#error Agent :: while resuming thread.\n");
+ nsk_jvmti_agentFailed();
+ } else {
+ nsk_printf(" Agent :: Thread resumed.\n");
+ retvalue= JNI_TRUE;
+ }
+ return retvalue;
+}
+
+#ifdef __cplusplus
+}
+#endif