/*

 * 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"

extern "C" {

#define PASSED  0

#define STATUS_FAILED  2

static JavaVM *vm;

static jvmtiEnv *jvmti = NULL;

static int verbose = 0;

static jint result = PASSED;

void redirect(JNIEnv *env, jvmtiError exError) {

    jvmtiError err;

    if (verbose)

        printf("\ntrying to overwrite the JNI function table expecting the error %s to be returned ...\n",

            TranslateError(exError));

    if ((err = jvmti->SetJNIFunctionTable(NULL)) !=

            exError) {

        result = STATUS_FAILED;

        printf("(%s,%d): TEST FAILED: SetJNIFunctionTable() returns %s instead of %s as expected\n",

            __FILE__, __LINE__, TranslateError(err), TranslateError(exError));

        return;

    }

    else if (verbose)

        printf("CHECK PASSED: SetJNIFunctionTable() returns %s as expected\n",

            TranslateError(err));

}

JNIEXPORT jint JNICALL

Java_nsk_jvmti_SetJNIFunctionTable_setjniftab002_check(JNIEnv *env, jobject obj) {

    jint res;

    JNIEnv *nextEnv = NULL;

    if (jvmti == NULL) {

        printf("(%s,%d): TEST FAILURE: JVMTI client was not properly loaded\n",

            __FILE__, __LINE__);

        return STATUS_FAILED;

    }

    /* a) Verifying the error JVMTI_ERROR_NULL_POINTER */

    if (verbose)

        printf("\na) Checking the function with the parameter JVMTI_ERROR_NULL_POINTER ...\n");

    redirect(env, JVMTI_ERROR_NULL_POINTER);

    /* b) Verifying the error JVMTI_ERROR_UNATTACHED_THREAD

       Note: the JNI spec says that the main thread can be detached from the VM

       only since JDK 1.2 */

    if (verbose)

        printf("\nb) Checking the function with the detached thread ...\n\ndetaching the main thread ...\n");

            __FILE__, __LINE__, res);

        redirect(env, JVMTI_ERROR_UNATTACHED_THREAD);

        if (verbose)

            printf("\nattaching the main thread back ...\n");

        if ((res = vm->AttachCurrentThread((void **) &nextEnv, (void *) 0)) != JNI_OK) {

            printf("(%s,%d): TEST FAILURE: waitingThread: AttachCurrentThread() returns: %d\n",

                __FILE__, __LINE__, res);

            return STATUS_FAILED;

        }

    }

    return result;

}

#ifdef STATIC_BUILD

JNIEXPORT jint JNICALL Agent_OnLoad_setjniftab002(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNICALL Agent_OnAttach_setjniftab002(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNI_OnLoad_setjniftab002(JavaVM *jvm, char *options, void *reserved) {

    return JNI_VERSION_1_8;

}

#endif

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

    jint res;

    if (options != NULL && strcmp(options, "-verbose") == 0)

        verbose = 1;

    if (verbose)

        printf("verbose mode on\n");

    res = jvm->GetEnv((void **) &jvmti, JVMTI_VERSION_1_1);

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

        printf("(%s,%d): Failed to call GetEnv\n", __FILE__, __LINE__);

        return JNI_ERR;

    }

    vm = jvm;

    return JNI_OK;

}

}