/*

 * 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 <string.h>

#include "jvmti.h"

#include "agent_common.h"

#include "jni_tools.h"

#include "jvmti_tools.h"

extern "C" {

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

static jlong timeout = 0;

static jvmtiEnv* st_jvmti = NULL;

static int *user_data = 0, objCounter = 0;

static jlong nanos = 0;

static jvmtiTimerInfo timer_info1, timer_info2;

static const char* debugeeClassSignature = "Lnsk/jvmti/IterateOverObjectsReachableFromObject/iterobjreachobj005;";

static const char* objectFieldName = "object";

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

jvmtiIterationControl JNICALL

    objCounter++;

    if (!NSK_JVMTI_VERIFY(st_jvmti->GetCurrentThreadCpuTimerInfo(&timer_info1))) {

        nsk_jvmti_setFailStatus();

    }

    /* Check the returned jvmtiTimerInfo structure */

    if (timer_info1.max_value == 0) {

        NSK_COMPLAIN0("GetCurrentThreadCpuTimerInfo returned zero in jvmtiTimerInfo.max_value\n");

        nsk_jvmti_setFailStatus();

    }

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

        NSK_COMPLAIN0("GetCurrentThreadCpuTimerInfo returned unknown type value in jvmtiTimerInfo.may_skip_forward\n");

        nsk_jvmti_setFailStatus();

    }

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

        NSK_COMPLAIN0("GetCurrentThreadCpuTimerInfo returned unknown type value in jvmtiTimerInfo.may_skip_backward\n");

        nsk_jvmti_setFailStatus();

    }

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

    if (!NSK_JVMTI_VERIFY(st_jvmti->GetCurrentThreadCpuTime(&nanos))) {

        nsk_jvmti_setFailStatus();

    }

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

    if (!NSK_JVMTI_VERIFY(st_jvmti->GetTimerInfo(&timer_info2))) {

        nsk_jvmti_setFailStatus();

    }

    /* Check the returned jvmtiTimerInfo structure */

    if (timer_info2.max_value == 0) {

        NSK_COMPLAIN0("GetTimerInfo returned zero in jvmtiTimerInfo.max_value\n");

        nsk_jvmti_setFailStatus();

    }

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

        NSK_COMPLAIN0("GetTimerInfo returned unknown type value in jvmtiTimerInfo.may_skip_forward\n");

        nsk_jvmti_setFailStatus();

    }

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

        NSK_COMPLAIN0("GetTimerInfo returned unknown type value in jvmtiTimerInfo.may_skip_backward\n");

        nsk_jvmti_setFailStatus();

    }

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

    nanos = 0;

    if (!NSK_JVMTI_VERIFY(st_jvmti->GetTime(&nanos))) {

        nsk_jvmti_setFailStatus();

    }

    /*  Iterate over only first object */

    return JVMTI_ITERATION_ABORT;

}

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

/** Agent algorithm. */

static void JNICALL

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

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

    if (!NSK_VERIFY(nsk_jvmti_waitForSync(timeout)))

        return;

    do {

        NSK_DISPLAY0("Calling IterateOverInstancesOfClass with filter JVMTI_HEAP_OBJECT_EITHER\n");

        {

            jclass debugeeClass = NULL;

            jfieldID objectField = NULL;

            jobject object = NULL;

            NSK_DISPLAY1("Find debugee class: %s\n", debugeeClassSignature);

            debugeeClass = nsk_jvmti_classBySignature(debugeeClassSignature);

            if (debugeeClass == NULL) {

                nsk_jvmti_setFailStatus();

                break;

            }

            NSK_DISPLAY1("Find static field in debugee class: %s\n", objectFieldName);

            if (!NSK_JNI_VERIFY(jni, (objectField = jni->GetStaticFieldID(

                    debugeeClass, objectFieldName, debugeeClassSignature)) != NULL)) {

                nsk_jvmti_setFailStatus();

                break;

            }

            NSK_DISPLAY1("Find value of static field in debugee class: %s\n", objectFieldName);

            if (!NSK_JNI_VERIFY(jni, (object =

                    jni->GetStaticObjectField(debugeeClass, objectField)) != NULL)) {

                nsk_jvmti_setFailStatus();

                break;

            }

            NSK_DISPLAY0("Calling IterateOverObjectsReachableFromObject with filter JVMTI_HEAP_OBJECT_EITHER\n");

            {

                if (!NSK_JVMTI_VERIFY(jvmti->IterateOverObjectsReachableFromObject(

                        object, objectReferenceCallback, &user_data))) {

                    nsk_jvmti_setFailStatus();

                }

            }

            if (objCounter == 0) {

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

                nsk_jvmti_setFailStatus();

            }

        }

    } while (0);

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

    if (!NSK_VERIFY(nsk_jvmti_resumeSync()))

        return;

}

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

/** Agent library initialization. */

#ifdef STATIC_BUILD

JNIEXPORT jint JNICALL Agent_OnLoad_iterobjreachobj005(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNICALL Agent_OnAttach_iterobjreachobj005(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNI_OnLoad_iterobjreachobj005(JavaVM *jvm, char *options, void *reserved) {

    return JNI_VERSION_1_8;

}

#endif

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

    jvmtiEnv* jvmti = NULL;

    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;

    /* save pointer to environment to use it in callbacks */

    st_jvmti = jvmti;

    {

        jvmtiCapabilities caps;

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

        caps.can_tag_objects = 1;

        caps.can_get_current_thread_cpu_time = 1;

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

            return JNI_ERR;

        }

    }

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

        return JNI_ERR;

    return JNI_OK;

}

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

}