/*

 * Copyright (c) 2004, 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 <stdlib.h>

#include <string.h>

#include "jni_tools.h"

#include "agent_common.h"

#include "jvmti_tools.h"

#define PASSED 0

#define STATUS_FAILED 2

#ifdef __cplusplus

extern "C" {

#endif

/* ========================================================================== */

/* scaffold objects */

static jlong timeout = 0;

/* event counts */

static int GarbageCollectionStartEventsCount = 0;

static int GarbageCollectionFinishEventsCount = 0;

/* ========================================================================== */

/** callback functions **/

static void JNICALL

GarbageCollectionStart(jvmtiEnv *jvmti_env) {

    GarbageCollectionStartEventsCount++;

    NSK_DISPLAY0("GarbageCollectionStart\n");

}

static void JNICALL

GarbageCollectionFinish(jvmtiEnv *jvmti_env) {

    GarbageCollectionFinishEventsCount++;

    NSK_DISPLAY0("GarbageCollectionFinish\n");

}

/* ========================================================================== */

/** Agent algorithm. */

static void JNICALL

agentProc(jvmtiEnv* jvmti, JNIEnv* jni, void* arg) {

    if (!nsk_jvmti_waitForSync(timeout))

        return;

    NSK_DISPLAY1("GarbageCollectionStart events received: %d\n",

        GarbageCollectionStartEventsCount);

    if (!NSK_VERIFY(GarbageCollectionStartEventsCount != 0))

        nsk_jvmti_setFailStatus();

    NSK_DISPLAY1("GarbageCollectionFinish events received: %d\n",

        GarbageCollectionFinishEventsCount);

    if (!NSK_VERIFY(GarbageCollectionFinishEventsCount != 0))

        nsk_jvmti_setFailStatus();

    if (!nsk_jvmti_resumeSync())

        return;

}

/* ========================================================================== */

/** Agent library initialization. */

#ifdef STATIC_BUILD

JNIEXPORT jint JNICALL Agent_OnLoad_ma10t007(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNICALL Agent_OnAttach_ma10t007(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNI_OnLoad_ma10t007(JavaVM *jvm, char *options, void *reserved) {

    return JNI_VERSION_1_8;

}

#endif

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

    jvmtiEnv* jvmti = NULL;

    jvmtiCapabilities caps;

    jvmtiEventCallbacks callbacks;

    NSK_DISPLAY0("Agent_OnLoad\n");

    if (!NSK_VERIFY(nsk_jvmti_parseOptions(options)))

        return JNI_ERR;

    timeout = nsk_jvmti_getWaitTime() * 60 * 1000;

    if (!NSK_VERIFY((jvmti =

            nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL))

        return JNI_ERR;

    if (!NSK_VERIFY(nsk_jvmti_setAgentProc(agentProc, NULL)))

        return JNI_ERR;

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

    caps.can_generate_garbage_collection_events = 1;

    if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(AddCapabilities, jvmti, &caps))) {

        return JNI_ERR;

    }

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

    callbacks.GarbageCollectionStart = &GarbageCollectionStart;

    callbacks.GarbageCollectionFinish = &GarbageCollectionFinish;

    if (!NSK_VERIFY(nsk_jvmti_init_MA(&callbacks)))

        return JNI_ERR;

    if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB4(SetEventNotificationMode,

            jvmti, JVMTI_ENABLE, JVMTI_EVENT_GARBAGE_COLLECTION_START, NULL)))

        return JNI_ERR;

    if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB4(SetEventNotificationMode,

            jvmti, JVMTI_ENABLE, JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, NULL)))

        return JNI_ERR;

    return JNI_OK;

}

/* ========================================================================== */

#ifdef __cplusplus

}

#endif