/*

 * 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 <jni.h>

#include <jvmti.h>

#include "agent_common.h"

#include <string.h>

#include "jvmti_tools.h"

#include "jni_tools.h"

extern "C" {

#define FILE_NAME "nsk/jvmti/scenarios/hotswap/HS301/hs301t001/MyClass"

#define DIR_NAME "newclass"

#define PATH_FORMAT "%s%02d/%s"

#define SEARCH_NAME "nsk/jvmti/scenarios/hotswap/HS301/hs301t001/MyClass"

#define CLASS_NAME "Lnsk/jvmti/scenarios/hotswap/HS301/hs301t001/MyClass;"

static jvmtiEnv * jvmti;

#ifdef STATIC_BUILD

JNIEXPORT jint JNICALL Agent_OnLoad_hs301t001(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNICALL Agent_OnAttach_hs301t001(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNI_OnLoad_hs301t001(JavaVM *jvm, char *options, void *reserved) {

    return JNI_VERSION_1_8;

}

#endif

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

    nsk_printf("Agent:: Agent_OnLoad .\n");

    if (!NSK_VERIFY (JNI_OK == vm->GetEnv((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_printf("# error agent Failed to parse options.\n");

            return JNI_ERR;

        }

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

        caps.can_redefine_classes = 1;

        if (!NSK_JVMTI_VERIFY (jvmti->AddCapabilities(&caps))) {

            nsk_printf(" Agent:: Error occured while adding capabilities.\n");

            return JNI_ERR;

        }

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

        if (!NSK_JVMTI_VERIFY(jvmti->SetEventCallbacks(&eventCallbacks, sizeof(eventCallbacks)))) {

            nsk_printf(" Agent:: Error occured while setting event call back.\n");

            return JNI_ERR;

        }

    }

    return JNI_OK;

}

JNIEXPORT jboolean JNICALL

Java_nsk_jvmti_scenarios_hotswap_HS301_hs301t001_hs301t001_redefine(JNIEnv * jni, jobject jboj) {

    jclass cls;

    jboolean ret;

    char fileName[512];

    int redefineNumber;

    redefineNumber=0;

    cls = jni->FindClass(SEARCH_NAME);

    if (!NSK_JNI_VERIFY(jni, cls != NULL)) {

        nsk_printf("Agent:: (*JNI)->FindClass(jni, %s) returns `null`.\n",SEARCH_NAME);

        return NSK_FALSE;

    }

    ret = JNI_FALSE;

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

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

        nsk_printf("Agent:: Redefine successful.\n");

        ret = JNI_TRUE;

    } else {

        nsk_printf("#error Agent :: Redefine failed.\n");

    }

    return ret;

}

}