/*

 * Copyright (c) 2003, 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 <string.h>

#include "jvmti.h"

#include "agent_common.h"

#include "JVMTITools.h"

#ifdef __cplusplus

extern "C" {

#endif

#ifndef JNI_ENV_ARG

#ifdef __cplusplus

#define JNI_ENV_ARG(x, y) y

#define JNI_ENV_PTR(x) x

#else

#define JNI_ENV_ARG(x,y) x, y

#define JNI_ENV_PTR(x) (*x)

#endif

#endif

#define PASSED  0

#define STATUS_FAILED  2

static jvmtiEnv *jvmti;

static jvmtiEventCallbacks callbacks;

static jvmtiCapabilities caps;

static jint result = PASSED;

void JNICALL FieldModification(jvmtiEnv *jvmti_env, JNIEnv *env,

        jthread thd, jmethodID mid, jlocation loc,

        jclass field_klass, jobject obj, jfieldID field,

        char sig, jvalue new_value) {

}

#ifdef STATIC_BUILD

JNIEXPORT jint JNICALL Agent_OnLoad_clrfmodw002(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNICALL Agent_OnAttach_clrfmodw002(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNI_OnLoad_clrfmodw002(JavaVM *jvm, char *options, void *reserved) {

    return JNI_VERSION_1_8;

}

#endif

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

    jint res;

    jvmtiError err;

    res = JNI_ENV_PTR(jvm)->GetEnv(JNI_ENV_ARG(jvm, (void **) &jvmti),

        JVMTI_VERSION_1_1);

    if (res != JNI_OK || jvmti == NULL) {

        printf("Wrong result of a valid call to GetEnv !\n");

        return JNI_ERR;

    }

    if (err != JVMTI_ERROR_NONE) {

        printf("(GetPotentialCapabilities) unexpected error: %s (%d)\n",

               TranslateError(err), err);

        return JNI_ERR;

    }

    if (err != JVMTI_ERROR_NONE) {

        printf("(AddCapabilities) unexpected error: %s (%d)\n",

               TranslateError(err), err);

        return JNI_ERR;

    }

    if (err != JVMTI_ERROR_NONE) {

        printf("(GetCapabilities) unexpected error: %s (%d)\n",

               TranslateError(err), err);

        return JNI_ERR;

    }

    if (caps.can_generate_field_modification_events) {

        callbacks.FieldModification = &FieldModification;

        if (err != JVMTI_ERROR_NONE) {

            printf("(SetEventCallbacks) unexpected error: %s (%d)\n",

                   TranslateError(err), err);

            return JNI_ERR;

        }

                JVMTI_EVENT_FIELD_MODIFICATION, NULL);

        if (err != JVMTI_ERROR_NONE) {

            printf("Failed to enable JVMTI_EVENT_FIELD_MODIFICATION: %s (%d)\n",

                   TranslateError(err), err);

            return JNI_ERR;

        }

    } else {

        printf("Warning: FieldModification watch is not implemented\n");

    }

    return JNI_OK;

}

JNIEXPORT void JNICALL

Java_nsk_jvmti_ClearFieldModificationWatch_clrfmodw002_check(JNIEnv *env,

        jclass cls) {

    jvmtiError err;

    jfieldID fid1, fid2;

    fid1 = JNI_ENV_PTR(env)->GetStaticFieldID(JNI_ENV_ARG(env, cls),

        "fld1", "I");

    fid2 = JNI_ENV_PTR(env)->GetStaticFieldID(JNI_ENV_ARG(env, cls),

        "fld2", "I");

    if (!caps.can_generate_field_modification_events) {

        printf("Warning: ClearFieldModificationWatch is not implemented\n");

        if (err != JVMTI_ERROR_MUST_POSSESS_CAPABILITY) {

            result = STATUS_FAILED;

            printf("Failed to return MUST_POSSESS_CAPABILITY: %s (%d)\n",

                   TranslateError(err), err);

        }

    } else {

        if (err != JVMTI_ERROR_INVALID_CLASS) {

            result = STATUS_FAILED;

            printf("Failed to return JVMTI_ERROR_INVALID_CLASS: %s (%d)\n",

                   TranslateError(err), err);

        }

        if (err != JVMTI_ERROR_INVALID_FIELDID) {

            result = STATUS_FAILED;

            printf("Failed to return INVALID_FIELDID: %s (%d)\n",

                   TranslateError(err), err);

        }

        if (err != JVMTI_ERROR_NOT_FOUND) {

            result = STATUS_FAILED;

            printf("Failed to return NOT_FOUND: %s (%d)\n",

                   TranslateError(err), err);

        }

    }

}

JNIEXPORT jint JNICALL

Java_nsk_jvmti_ClearFieldModificationWatch_clrfmodw002_getRes(JNIEnv *env,

        jclass cls) {

    return result;

}

#ifdef __cplusplus

}

#endif