/*

 * 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 <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <jvmti.h>

#include "agent_common.h"

#include "nsk_tools.h"

#include "jni_tools.h"

#include "JVMTITools.h"

#include "jvmti_tools.h"

extern "C" {

#define PASSED  0

#define STATUS_FAILED  2

#define EXP_OBJ_FREE 2

static JNIEnv *jni = NULL;

static jvmtiEnv *jvmti = NULL;

static jvmtiEventCallbacks callbacks;

static jvmtiCapabilities caps;

static volatile int obj_free = 0;

static volatile long obj_count = 0;

static jlong timeout = 0;

static int user_data = 0;

static const char* DEBUGEE_SIGNATURE = "Lnsk/jvmti/scenarios/allocation/AP12/ap12t001;";

static const jlong DEBUGEE_CLASS_TAG = (jlong)1024;

void JNICALL

ObjectFree(jvmtiEnv *jvmti_env, jlong tag) {

    NSK_DISPLAY1("ObjectFree event received for an object with tag %ld\n\n", (long)tag);

    obj_free++;

}

void JNICALL

VMDeath(jvmtiEnv *jvmti_env, JNIEnv *env) {

    NSK_DISPLAY0("VMDeath event received\n");

    if (obj_free != EXP_OBJ_FREE) {

        NSK_COMPLAIN2(

            "Received unexpected number of ObjectFree events: %d\n"

            "\texpected number: %d\n",

            obj_free, EXP_OBJ_FREE);

        exit(95 + STATUS_FAILED);

    }

    exit(95 + PASSED);

}

/************************/

JNIEXPORT void JNICALL

    if (!NSK_JVMTI_VERIFY(jvmti->SetTag(obj, tag))) {

         nsk_jvmti_setFailStatus();

    }

}

static void JNICALL

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

    jclass debugeeClass = NULL;

    NSK_DISPLAY0("Wait for debugee start\n\n");

    if (!NSK_VERIFY(nsk_jvmti_waitForSync(timeout)))

        return;

    NSK_DISPLAY0("Let debugee to provoke GC\n");

    if (!NSK_VERIFY(nsk_jvmti_resumeSync()))

        return;

    if (!NSK_VERIFY(nsk_jvmti_waitForSync(timeout)))

        return;

    NSK_DISPLAY0("Let debugee to finish\n");

    if (!NSK_VERIFY(nsk_jvmti_resumeSync()))

        return;

}

#ifdef STATIC_BUILD

JNIEXPORT jint JNICALL Agent_OnLoad_ap12t001(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNICALL Agent_OnAttach_ap12t001(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNI_OnLoad_ap12t001(JavaVM *jvm, char *options, void *reserved) {

    return JNI_VERSION_1_8;

}

#endif

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

    /* init framework and parse options */

    if (!NSK_VERIFY(nsk_jvmti_parseOptions(options)))

        return JNI_ERR;

    /* create JVMTI environment */

    if (!NSK_VERIFY((jvmti =

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

        return JNI_ERR;

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

    caps.can_generate_object_free_events = 1;

    caps.can_tag_objects = 1;

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

        return JNI_ERR;

    if (!NSK_JVMTI_VERIFY(jvmti->GetCapabilities(&caps)))

        return JNI_ERR;

    if (!caps.can_generate_object_free_events)

        NSK_DISPLAY0("Warning: generation of object free events is not implemented\n");

    if (!caps.can_tag_objects)

        NSK_DISPLAY0("Warning: tagging objects is not implemented\n");

    /* set event callback */

    NSK_DISPLAY0("setting event callbacks ...\n");

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

    callbacks.ObjectFree = &ObjectFree;

    callbacks.VMDeath = &VMDeath;

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

        return JNI_ERR;

    NSK_DISPLAY0("setting event callbacks done\nenabling JVMTI events ...\n");

    if (!NSK_JVMTI_VERIFY(jvmti->SetEventNotificationMode(JVMTI_ENABLE,

                                                          JVMTI_EVENT_OBJECT_FREE,

                                                          NULL)))

        return JNI_ERR;

    if (!NSK_JVMTI_VERIFY(jvmti->SetEventNotificationMode(JVMTI_ENABLE,

                                                          JVMTI_EVENT_VM_DEATH,

                                                          NULL)))

        return JNI_ERR;

    NSK_DISPLAY0("enabling the events done\n\n");

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

        return JNI_ERR;

    NSK_DISPLAY0("agentProc has been set\n\n");

    return JNI_OK;

}

}