/*

 * 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 <string.h>

#include <jvmti.h>

#include "agent_common.h"

#include "nsk_tools.h"

#include "JVMTITools.h"

#include "jvmti_tools.h"

extern "C" {

#define STATUS_FAILED 2

#define PASSED 0

#define MAX_SIZE 256

static jvmtiEnv *jvmti = NULL;

static jvmtiEventCallbacks callbacks;

static jvmtiCapabilities caps;

static volatile int gcfinish = 0, gcstart = 0, objfree = 0;

static long objectCount = 0;

static jlong nanos = 0;

static jlong timeout = 0;

static jvmtiTimerInfo timer_info1, timer_info2;

static int user_data = 0;

typedef struct _LocalStorage {

    unsigned char data[MAX_SIZE];

} LocalStorage;

static LocalStorage stor;

static void envStorageFunc(jvmtiEnv *jvmti_env, const char *msg) {

    LocalStorage* obtainedData = NULL;

    LocalStorage* storedData = &stor;

    NSK_DISPLAY2("%s: setting an environment local storage 0x%p ...\n",

        msg, (void*) &stor);

        nsk_jvmti_setFailStatus();

        NSK_COMPLAIN1("%s: unable to set an environment local storage\n\n",

            msg);

        return;

    }

    NSK_DISPLAY1("%s: getting an environment local storage ...\n",

        msg);

        nsk_jvmti_setFailStatus();

        NSK_COMPLAIN1("%s: unable to get an environment local storage\n\n",

            msg);

        return;

    }

    else {

        if (obtainedData != storedData) {

            nsk_jvmti_setFailStatus();

            NSK_COMPLAIN3(

                "%s: obtained an environment local storage has unexpected pointer:\n"

                "got: 0x%p\texpected: 0x%p\n\n",

                msg, (void*) obtainedData, (void*) storedData);

        }

    }

}

static void timerFunc(jvmtiEnv *jvmti_env, const char *msg) {

        nsk_jvmti_setFailStatus();

        NSK_COMPLAIN1("%s: GetCurrentThreadCpuTimerInfo returned unexpected error code\n\n",

            msg);

    }

    /* Check the returned jvmtiTimerInfo structure */

    if (timer_info1.max_value == 0) {

        nsk_jvmti_setFailStatus();

        NSK_COMPLAIN1("%s: GetCurrentThreadCpuTimerInfo returned zero in jvmtiTimerInfo.max_value\n\n",

            msg);

    }

    if (timer_info1.may_skip_forward != JNI_TRUE && timer_info1.may_skip_forward != JNI_FALSE) {

        nsk_jvmti_setFailStatus();

        NSK_COMPLAIN1("%s: GetCurrentThreadCpuTimerInfo returned unknown type value in jvmtiTimerInfo.may_skip_forward\n\n",

            msg);

    }

    if (timer_info1.may_skip_backward != JNI_TRUE && timer_info1.may_skip_backward != JNI_FALSE) {

        nsk_jvmti_setFailStatus();

        NSK_COMPLAIN1("%s: GetCurrentThreadCpuTimerInfo returned unknown type value in jvmtiTimerInfo.may_skip_backward\n\n",

            msg);

    }

    /* ---------------------------------------------------------------------- */

        nsk_jvmti_setFailStatus();

        NSK_COMPLAIN1("%s: GetCurrentThreadCpuTime returned unexpected error code\n\n",

            msg);

    }

    /* ---------------------------------------------------------------------- */

        nsk_jvmti_setFailStatus();

        NSK_COMPLAIN1("%s: GetTimerInfo returned unexpected error code\n\n",

            msg);

    }

    /* Check the returned jvmtiTimerInfo structure */

    if (timer_info2.max_value == 0) {

        nsk_jvmti_setFailStatus();

        NSK_COMPLAIN1("%s: GetTimerInfo returned zero in jvmtiTimerInfo.max_value\n\n",

            msg);

    }

    if (timer_info2.may_skip_forward != JNI_TRUE && timer_info2.may_skip_forward != JNI_FALSE) {

        nsk_jvmti_setFailStatus();

        NSK_COMPLAIN1("%s: GetTimerInfo returned unknown type value in jvmtiTimerInfo.may_skip_forward\n\n",

            msg);

    }

    if (timer_info2.may_skip_backward != JNI_TRUE && timer_info2.may_skip_backward != JNI_FALSE) {

        nsk_jvmti_setFailStatus();

        NSK_COMPLAIN1("%s: GetTimerInfo returned unknown type value in jvmtiTimerInfo.may_skip_backward\n\n",

            msg);

    }

    /* ---------------------------------------------------------------------- */

    nanos = 0;

        nsk_jvmti_setFailStatus();

        NSK_COMPLAIN1("%s: GetTime returned unexpected error code\n\n",

            msg);

    }

}

/** callback functions **/

void JNICALL

GarbageCollectionFinish(jvmtiEnv *jvmti_env) {

    gcfinish++;

    NSK_DISPLAY1(">>>> GarbageCollectionFinish event #%d received\n",

        gcfinish);

    timerFunc(jvmti_env, "GarbageCollectionFinish");

    envStorageFunc(jvmti_env, "GarbageCollectionFinish");

    NSK_DISPLAY0("<<<<\n\n");

}

void JNICALL

GarbageCollectionStart(jvmtiEnv *jvmti_env) {

    gcstart++;

    NSK_DISPLAY1(">>>> GarbageCollectionStart event #%d received\n",

        gcstart);

    timerFunc(jvmti_env, "GarbageCollectionStart");

    envStorageFunc(jvmti_env, "GarbageCollectionStart");

    NSK_DISPLAY0("<<<<\n\n");

}

void JNICALL

ObjectFree(jvmtiEnv *jvmti_env, jlong tag) {

    NSK_DISPLAY0(">>>> ObjectFree event received\n");

    objfree++;

    timerFunc(jvmti_env, "ObjectFree");

    envStorageFunc(jvmti_env, "ObjectFree");

    NSK_DISPLAY0("<<<<\n\n");

}

jvmtiIterationControl JNICALL

heapObjectCallback(jlong class_tag,

                   jlong size,

                   jlong* tag_ptr,

                   void* user_data) {

    /* set tag */

    *tag_ptr = (jlong)++objectCount;

    /* iterate over only first MAX_SIZE objects */

    if (objectCount >= MAX_SIZE)

        return JVMTI_ITERATION_ABORT;

    return JVMTI_ITERATION_CONTINUE;

}

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

static void JNICALL

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

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

    if (!NSK_VERIFY(nsk_jvmti_waitForSync(timeout)))

        return;

    NSK_DISPLAY0("Call IterateOverHeap to tag random objects for ObjectFree evnts\n\n");

    {

            nsk_jvmti_setFailStatus();

        }

    }

    if (objectCount == 0) {

        nsk_jvmti_setFailStatus();

        NSK_COMPLAIN0("IterateOverHeap call had not visited any object\n\n");

    } else {

        NSK_DISPLAY1("Number of objects IterateOverHeap visited: %d\n\n", objectCount);

    }

    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_ap10t001(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNICALL Agent_OnAttach_ap10t001(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNI_OnLoad_ap10t001(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;

    /* add capability to generate compiled method events */

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

    caps.can_tag_objects = 1;

    caps.can_get_current_thread_cpu_time = 1;

    caps.can_get_thread_cpu_time = 1;

    caps.can_generate_object_free_events = 1;

    caps.can_generate_garbage_collection_events = 1;

        return JNI_ERR;

        return JNI_ERR;

    if (!caps.can_generate_garbage_collection_events)

        NSK_DISPLAY0("Warning: generation of garbage collection events is not implemented\n");

    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.GarbageCollectionStart = &GarbageCollectionStart;

    callbacks.GarbageCollectionFinish = &GarbageCollectionFinish;

    callbacks.ObjectFree = &ObjectFree;

        return JNI_ERR;

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

        return JNI_ERR;

        return JNI_ERR;

        return JNI_ERR;

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

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

        return JNI_ERR;

    return JNI_OK;

}

}