/*

 * 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

#define WAIT_STEP 100

#define INCREMENT_LIMIT 1000

#define DELAY 100

static jvmtiEnv *jvmti = NULL;

static jint result = PASSED;

static jboolean printdump = JNI_FALSE;

static jrawMonitorID monitor;

static jrawMonitorID wait_lock;

static jint monitorCount = 0;

#ifdef STATIC_BUILD

JNIEXPORT jint JNICALL Agent_OnLoad_rawmonenter004(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNICALL Agent_OnAttach_rawmonenter004(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNI_OnLoad_rawmonenter004(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, "printdump") == 0) {

        printdump = JNI_TRUE;

    }

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

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

        return JNI_ERR;

    }

    return JNI_OK;

}

static void JNICALL

increment_thread(jvmtiEnv* jvmti, JNIEnv* jni, void *unused) {

    jvmtiError err;

    jint temp;

    int i, j;

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

        err = jvmti->RawMonitorEnter(monitor);

        if (err != JVMTI_ERROR_NONE) {

            printf("(RawMonitorEnter#test) unexpected error: %s (%d)\n",

                   TranslateError(err), err);

            result = STATUS_FAILED;

        }

        temp = monitorCount;

        for (j = 0; j < DELAY; j++) ;

        monitorCount = temp + 1;

        err = jvmti->RawMonitorExit(monitor);

        if (err != JVMTI_ERROR_NONE) {

            printf("(RawMonitorExit#test) unexpected error: %s (%d)\n",

                   TranslateError(err), err);

            result = STATUS_FAILED;

        }

    }

}

JNIEXPORT jint JNICALL

Java_nsk_jvmti_RawMonitorEnter_rawmonenter004_check(JNIEnv *env, jclass cls, jobjectArray threads, jint wtime) {

    jvmtiError err;

    jsize i, threads_limit;

    jthread thr;

    jint wait_time = wtime * 60000;

    if (jvmti == NULL) {

        printf("JVMTI client was not properly loaded!\n");

        return STATUS_FAILED;

    }

    err = jvmti->CreateRawMonitor("test monitor", &monitor);

    if (err != JVMTI_ERROR_NONE) {

        printf("(CreateRawMonitor#test) unexpected error: %s (%d)\n",

               TranslateError(err), err);

        return STATUS_FAILED;

    }

    err = jvmti->CreateRawMonitor("wait lock", &wait_lock);

    if (err != JVMTI_ERROR_NONE) {

        printf("(CreateRawMonitor#wait) unexpected error: %s (%d)\n",

               TranslateError(err), err);

        return STATUS_FAILED;

    }

    if (printdump == JNI_TRUE) {

        printf(">>> starting %d threads ...\n", threads_limit);

    }

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

        err = jvmti->RunAgentThread(thr, increment_thread, NULL,

                                    JVMTI_THREAD_NORM_PRIORITY);

        if (err != JVMTI_ERROR_NONE) {

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

                   TranslateError(err), err);

            return STATUS_FAILED;

        }

    }

    for (i = 0; i < wait_time/WAIT_STEP &&

            monitorCount != INCREMENT_LIMIT * threads_limit; i++) {

        err = jvmti->RawMonitorEnter(wait_lock);

        if (err != JVMTI_ERROR_NONE) {

            printf("(RawMonitorEnter#wait) unexpected error: %s (%d)\n",

                   TranslateError(err), err);

            result = STATUS_FAILED;

            break;

        }

        err = jvmti->RawMonitorWait(wait_lock, (jlong)WAIT_STEP);

        if (err != JVMTI_ERROR_NONE) {

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

                   TranslateError(err), err);

            result = STATUS_FAILED;

            break;

        }

        err = jvmti->RawMonitorExit(wait_lock);

        if (err != JVMTI_ERROR_NONE) {

            printf("(RawMonitorExit#wait) unexpected error: %s (%d)\n",

                   TranslateError(err), err);

            result = STATUS_FAILED;

            break;

        }

    }

    if (monitorCount != INCREMENT_LIMIT * threads_limit) {

        printf("Timeout value is reached, monitorCount expected: %d",

            INCREMENT_LIMIT * threads_limit);

        printf(", actual: %d\n", monitorCount);

        result = STATUS_FAILED;

    } else if (printdump == JNI_TRUE) {

        printf(">>> final monitorCount: %d\n", monitorCount);

    }

    return result;

}

}