/*

 * 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.

 */

/*

 Periodically hotswap class(es) with a changed version in

 asynchronous manner from specified number of JVMTI agents. The VM

 works in default mode.

*/

#include <jni.h>

#include <jvmti.h>

#include "agent_common.h"

#include <string.h>

#include "jni_tools.h"

#include "jvmti_tools.h"

#include "JVMTITools.h"

extern "C" {

#define FILE_NAME "nsk/jvmti/scenarios/hotswap/HS103/hs103t002/MyThread"

#define SEARCH_NAME "nsk/jvmti/scenarios/hotswap/HS103/hs103t002/MyThread"

#define MAIN_CLASS  "nsk/jvmti/scenarios/hotswap/HS103/hs103t002/hs103t002"

static jvmtiEnv * jvmti;

static jthread testAgentThread;

JNIEXPORT void JNICALL doRedefineInNativeThread(jvmtiEnv * jvmti,

                                                JNIEnv * jni, void * arg) {

  jclass cla;

  int i = 0;

  int redefineNumber = 0;

  char fileName[512];

  jclass testClass;

  jmethodID setRedefinitionDone;

  jmethodID setRedefinitionFailed;

  testClass = jni->FindClass(MAIN_CLASS);

  if (!NSK_JNI_VERIFY(jni, (

    setRedefinitionFailed = jni->GetStaticMethodID(testClass, "setRedefinitionFailed", "()V")) != NULL))

  {

    jni->FatalError("TEST FAILED: while getting setRedefinitionFailed()\n");

  }

  if (!NSK_JNI_VERIFY(jni, (

    setRedefinitionDone = jni->GetStaticMethodID(testClass, "setRedefinitionDone", "()V")) != NULL))

  {

    jni->FatalError("TEST FAILED: while getting setRedefinitionDone()\n");

  }

  nsk_printf("doRedefineInNativeThread\n");

  cla = jni->FindClass(SEARCH_NAME);

  nsk_jvmti_getFileName(redefineNumber, FILE_NAME, fileName, sizeof(fileName)/sizeof(char));

  for (i = 0; i < 30; i++) {

    nsk_printf(" Inside the redefine method..\n");

    if (nsk_jvmti_redefineClass(jvmti, cla,fileName)) {

      nsk_printf("\nMyClass :: Successfully redefined..\n");

    } else {

      nsk_printf("\nMyClass :: Failed to redefine ..\n");

      if (!NSK_JNI_VERIFY_VOID(jni, jni->CallStaticVoidMethod(testClass, setRedefinitionFailed)))

      {

         jni->FatalError("TEST FAILED: while calling setRedefinitionFailed()\n");

      }

    }

  }

  if (!NSK_JNI_VERIFY_VOID(jni, jni->CallStaticVoidMethod(testClass, setRedefinitionDone)))

  {

    jni->FatalError("TEST FAILED: while calling setRedefinitionDone()\n");

  }

  nsk_printf(" All 30 redefinitions are done..\n");

}

#ifdef STATIC_BUILD

JNIEXPORT jint JNICALL Agent_OnLoad_hs103t002(JavaVM *jvm, char *options, void *reserved) {

  return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNICALL Agent_OnAttach_hs103t002(JavaVM *jvm, char *options, void *reserved) {

  return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNI_OnLoad_hs103t002(JavaVM *jvm, char *options, void *reserved) {

  return JNI_VERSION_1_8;

}

#endif

jint Agent_Initialize(JavaVM *vm, char *options, void *reserved) {

  jint rc;

  nsk_printf("Agent:: VM.. Started..\n");

  rc = vm->GetEnv((void **)&jvmti, JVMTI_VERSION_1_1);

  if (rc != JNI_OK) {

    nsk_printf("Agent:: Could not load JVMTI interface \n");

    return JNI_ERR;

  } else {

    jvmtiCapabilities caps;

    if (!nsk_jvmti_parseOptions(options)) {

      nsk_printf("# error agent Failed to parse options \n");

      return JNI_ERR;

    }

    memset(&caps, 0, sizeof(caps));

    caps.can_redefine_classes = 1;

    jvmti->AddCapabilities(&caps);

  }

  return JNI_OK;

}

JNIEXPORT jboolean JNICALL

Java_nsk_jvmti_scenarios_hotswap_HS103_hs103t002_hs103t002_startAgentThread(JNIEnv * jni, jclass cls) {

  jvmtiError err ;

  jthread thread;

  jclass clas;

  jmethodID method;

  const char * threadName = "Agent Thread";

  jobject name;

  nsk_printf("hs103t002_startAgentThread\n");

  name = jni->NewStringUTF(threadName);

  clas = jni->FindClass("java/lang/Thread");

  if (!NSK_JNI_VERIFY(jni, (method = jni->GetMethodID(clas, "<init>", "(Ljava/lang/String;)V")) != NULL)) {

    jni->FatalError("failed to get ID for the java method\n");

  }

  thread = (jthread) jni->NewObject(clas,method,name);

  testAgentThread = jni->NewGlobalRef(thread);

  err = JVMTI_ERROR_NONE;

  err = jvmti->RunAgentThread(testAgentThread, &doRedefineInNativeThread, NULL,

                                 JVMTI_THREAD_NORM_PRIORITY);

  if (err == JVMTI_ERROR_INVALID_PRIORITY) {

    nsk_printf(" JVMTI_ERROR_INVALID_PRIORITY ..\n");

    return JNI_ERR;

  } else if (err == JVMTI_ERROR_INVALID_THREAD) {

    nsk_printf(" JVMTI_ERROR_INVALID_THREAD ..\n");

    return JNI_ERR;

  } else if (err == JVMTI_ERROR_NULL_POINTER) {

    nsk_printf(" JVMTI_ERROR_NULL_POINTER ..\n");

    return JNI_ERR;

  } else {

    nsk_printf(" Agent Thread Created.. \n");

  }

  return JNI_OK;

}

}