test/hotspot/jtreg/vmTestbase/nsk/jvmti/scenarios/hotswap/HS203/hs203t004/hs203t004.cpp
/*
* Copyright (c) 2007, 2019, 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 "JVMTITools.h"
#include "jni_tools.h"
extern "C" {
#define FILE_NAME "nsk/jvmti/scenarios/hotswap/HS203/hs203t004/MyThread"
#define CLASS_NAME "Lnsk/jvmti/scenarios/hotswap/HS203/hs203t004/MyThread;"
#define METHOD_NAME "doTask2"
static jint redefineNumber;
static jvmtiEnv * jvmti;
JNIEXPORT void JNICALL callbackClassPrepare(jvmtiEnv *jvmti_env,
JNIEnv* jni,
jthread thread,
jclass klass) {
char * className;
className=NULL;
if (!NSK_JVMTI_VERIFY(jvmti_env->GetClassSignature(klass, &className, NULL))) {
NSK_COMPLAIN0("#error Agent :: while getting classname.\n");
nsk_jvmti_agentFailed();
} else {
if (strcmp(className, CLASS_NAME) == 0) {
if (nsk_jvmti_enableNotification(jvmti_env, JVMTI_EVENT_COMPILED_METHOD_LOAD, NULL)) {
NSK_DISPLAY0(" Agent :: notification enabled for COMPILED_METHOD_LOAD.\n");
if (!NSK_JVMTI_VERIFY(jvmti_env->GenerateEvents(JVMTI_EVENT_COMPILED_METHOD_LOAD))) {
NSK_COMPLAIN0("#error Agent :: occured while enabling compiled method events.\n");
nsk_jvmti_agentFailed();
}
}
}
if (!NSK_JVMTI_VERIFY(jvmti_env->Deallocate((unsigned char *)className))) {
NSK_COMPLAIN1("#error Agent :: failed to Deallocate className = %s.", className);
nsk_jvmti_agentFailed();
}
}
}
JNIEXPORT void JNICALL callbackCompiledMethodLoad(jvmtiEnv *jvmti_env,
jmethodID method,
jint code_size,
const void* code_addr,
jint map_length,
const jvmtiAddrLocationMap* map,
const void* compile_info) {
jclass threadClass;
if (redefineNumber == 0) {
if (!NSK_JVMTI_VERIFY(jvmti_env->GetMethodDeclaringClass(method, &threadClass))) {
NSK_COMPLAIN0("#error Agent :: while geting the declaring class.\n");
nsk_jvmti_agentFailed();
} else {
char *className;
char *methodName;
className = NULL;
methodName = NULL;
if (!NSK_JVMTI_VERIFY(jvmti_env->GetClassSignature(threadClass, &className, NULL))) {
NSK_COMPLAIN0("#error Agent :: while getting classname.\n");
nsk_jvmti_agentFailed();
return;
}
if (!NSK_JVMTI_VERIFY(jvmti_env->GetMethodName(method, &methodName, NULL, NULL))) {
NSK_COMPLAIN0("#error Agent :: while getting methodname.\n");
nsk_jvmti_agentFailed();
return;
}
if ((strcmp(className, CLASS_NAME) == 0) && (strcmp(methodName, METHOD_NAME) == 0)) {
char fileName[512];
NSK_DISPLAY2(" Agent :: Got CompiledMethodLoadEvent for class: %s, method: %s.\n", className, methodName);
NSK_DISPLAY0(" Agent :: redefining class.\n");
nsk_jvmti_getFileName(redefineNumber, FILE_NAME, fileName, sizeof(fileName)/sizeof(char));
if (nsk_jvmti_redefineClass(jvmti_env, threadClass, fileName)) {
NSK_DISPLAY0(" Agent :: Successfully redefined.\n");
redefineNumber++;
} else {
NSK_COMPLAIN0("#error Agent :: Failed to redefine.\n");
nsk_jvmti_agentFailed();
}
}
if (className != NULL) {
if (!NSK_JVMTI_VERIFY(jvmti_env->Deallocate((unsigned char *)className))) {
NSK_COMPLAIN1("#error Agent :: failed to Deallocate className = %s.", className);
nsk_jvmti_agentFailed();
}
}
if (methodName != NULL) {
if (!NSK_JVMTI_VERIFY(jvmti_env->Deallocate((unsigned char *)methodName))) {
NSK_COMPLAIN1("#error Agent :: failed to Deallocate methodName = %s.", methodName);
nsk_jvmti_agentFailed();
}
}
}
}
}
#ifdef STATIC_BUILD
JNIEXPORT jint JNICALL Agent_OnLoad_hs203t004(JavaVM *jvm, char *options, void *reserved) {
return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNICALL Agent_OnAttach_hs203t004(JavaVM *jvm, char *options, void *reserved) {
return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNI_OnLoad_hs203t004(JavaVM *jvm, char *options, void *reserved) {
return JNI_VERSION_1_8;
}
#endif
jint Agent_Initialize(JavaVM *vm, char *options, void *reserved) {
redefineNumber=0;
if (!NSK_VERIFY(JNI_OK == vm->GetEnv((void **)&jvmti, JVMTI_VERSION_1_1))) {
NSK_DISPLAY0("#error Agent :: Could not load JVMTI interface.\n");
return JNI_ERR;
} else {
jvmtiCapabilities caps;
jvmtiEventCallbacks eventCallbacks;
memset(&caps, 0, sizeof(caps));
if (!nsk_jvmti_parseOptions(options)) {
NSK_DISPLAY0("#error Agent :: Failed to parse options.\n");
return JNI_ERR;
}
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_compiled_method_load_events = 1;
if (!NSK_JVMTI_VERIFY(jvmti->AddCapabilities(&caps))) {
NSK_DISPLAY0("#error Agent :: occured while adding capabilities.\n");
return JNI_ERR;
}
memset(&eventCallbacks, 0, sizeof(eventCallbacks));
eventCallbacks.ClassPrepare =callbackClassPrepare;
eventCallbacks.CompiledMethodLoad=callbackCompiledMethodLoad;
if (!NSK_JVMTI_VERIFY(jvmti->SetEventCallbacks(&eventCallbacks, sizeof(eventCallbacks)))) {
NSK_COMPLAIN0("#error Agent :: occured while setting event callback.\n");
return JNI_ERR;
}
if (nsk_jvmti_enableNotification(jvmti,JVMTI_EVENT_CLASS_PREPARE, NULL)) {
NSK_DISPLAY0(" Agent :: Notifications are enabled.\n");
} else {
NSK_COMPLAIN0("#error Agent :: Error in enableing Notifications.\n");
return JNI_ERR;
}
}
return JNI_OK;
}
JNIEXPORT void JNICALL
Java_nsk_jvmti_scenarios_hotswap_HS203_hs203t004_hs203t004_suspendThread(JNIEnv * jni,
jobject clas,
jthread thread) {
NSK_DISPLAY0(" Agent :: Suspending Thread.\n");
if (NSK_JVMTI_VERIFY(jvmti->SuspendThread(thread))) {
NSK_DISPLAY0(" Agent :: Succeded in suspending.\n");
} else {
NSK_COMPLAIN0("#error Agent :: occured while suspending thread.\n");
nsk_jvmti_agentFailed();
}
}
JNIEXPORT jboolean JNICALL
Java_nsk_jvmti_scenarios_hotswap_HS203_hs203t004_hs203t004_popThreadFrame(JNIEnv * jni,
jobject clas,
jthread thread) {
jboolean retvalue;
jint state;
NSK_DISPLAY0(" Agent :: nsk.jvmti.scenarios.hotswap.HS203.hs203t004.popThreadFrame(...).\n");
retvalue = JNI_FALSE;
if (!NSK_JVMTI_VERIFY(jvmti->GetThreadState(thread, &state))) {
NSK_COMPLAIN0("#error Agent :: while getting thread's state.\n");
nsk_jvmti_agentFailed();
} else {
if (state & JVMTI_THREAD_STATE_SUSPENDED) {
if (!NSK_JVMTI_VERIFY(jvmti->PopFrame(thread))) {
NSK_DISPLAY0("#error Agent :: occured while poping thread's frame.\n");
nsk_jvmti_agentFailed();
} else {
if (NSK_JVMTI_VERIFY(
jvmti->SetEventNotificationMode(JVMTI_DISABLE,
JVMTI_EVENT_COMPILED_METHOD_LOAD, NULL))) {
NSK_DISPLAY0(" Agent :: Disabled JVMTI_EVENT_COMPILED_METHOD_LOAD.\n");
retvalue = JNI_TRUE;
} else {
NSK_COMPLAIN0("#error Agent :: Failed to disable JVMTI_EVENT_COMPILED_METHOD_LOAD.\n");
nsk_jvmti_agentFailed();
}
}
} else {
NSK_COMPLAIN0("#error Agent :: Thread was not suspened.\n");
nsk_jvmti_agentFailed();
}
}
return retvalue;
}
JNIEXPORT jboolean JNICALL
Java_nsk_jvmti_scenarios_hotswap_HS203_hs203t004_hs203t004_resumeThread(JNIEnv * jni,
jclass clas,
jthread thread) {
jboolean retvalue;
retvalue = JNI_FALSE;
if (NSK_JVMTI_VERIFY(jvmti->ResumeThread(thread))) {
NSK_DISPLAY0(" Agent :: Thread resumed.\n");
retvalue= JNI_TRUE;
} else {
NSK_COMPLAIN0("#error Agent :: Failed to resume the thread.\n");
nsk_jvmti_agentFailed();
}
return retvalue;
}
}