/*

 * 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 int fakeUserData = 0, objCounter = 0;

static jvmtiEnv* st_jvmti = NULL;

static const char debugeeClassSignature[] = "Lnsk/jvmti/IterateOverInstancesOfClass/iterinstcls005;";

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

jvmtiIterationControl JNICALL

heapObjectCallback(jlong class_tag,

                   jlong size,

                   jlong* tag_ptr,

                   void* user_data) {

    const char* name = "monitorName";

    jrawMonitorID monitor_ptr = NULL;

    objCounter++;

    if (!NSK_JVMTI_VERIFY(st_jvmti->CreateRawMonitor(name, &monitor_ptr))) {

        nsk_jvmti_setFailStatus();

        return JVMTI_ITERATION_ABORT;

    }

    if (!NSK_JVMTI_VERIFY(st_jvmti->RawMonitorEnter(monitor_ptr))) {

        nsk_jvmti_setFailStatus();

        return JVMTI_ITERATION_ABORT;

    }

    /* Enter second time */

    if (!NSK_JVMTI_VERIFY(st_jvmti->RawMonitorEnter(monitor_ptr))) {

        nsk_jvmti_setFailStatus();

        return JVMTI_ITERATION_ABORT;

    }

    if (!NSK_JVMTI_VERIFY(st_jvmti->RawMonitorWait(monitor_ptr, (jlong)100))) {

        nsk_jvmti_setFailStatus();

    }

    if (!NSK_JVMTI_VERIFY(st_jvmti->RawMonitorNotify(monitor_ptr))) {

        nsk_jvmti_setFailStatus();

    }

    if (!NSK_JVMTI_VERIFY(st_jvmti->RawMonitorNotifyAll(monitor_ptr))) {

        nsk_jvmti_setFailStatus();

    }

    if (!NSK_JVMTI_VERIFY(st_jvmti->RawMonitorExit(monitor_ptr))) {

        nsk_jvmti_setFailStatus();

        return JVMTI_ITERATION_ABORT;

    }

    /* Exit second time */

    if (!NSK_JVMTI_VERIFY(st_jvmti->RawMonitorExit(monitor_ptr))) {

        nsk_jvmti_setFailStatus();

        return JVMTI_ITERATION_ABORT;

    }

    if (!NSK_JVMTI_VERIFY(st_jvmti->DestroyRawMonitor(monitor_ptr))) {

        nsk_jvmti_setFailStatus();

    }

    return JVMTI_ITERATION_CONTINUE;

}

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

/** 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 {

        jclass debugeeClass = NULL;

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

        debugeeClass = nsk_jvmti_classBySignature(debugeeClassSignature);

        if (debugeeClass == NULL) {

            nsk_jvmti_setFailStatus();

            break;

        }

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

        {

            if (!NSK_JVMTI_VERIFY(

                    jvmti->IterateOverInstancesOfClass(debugeeClass,

                                                       JVMTI_HEAP_OBJECT_EITHER,

                                                       heapObjectCallback,

                                                       &fakeUserData))) {

                nsk_jvmti_setFailStatus();

            }

        }

        if (objCounter == 0) {

            NSK_COMPLAIN0("IterateOverInstancesOfClass 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_iterinstcls005(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNICALL Agent_OnAttach_iterinstcls005(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNI_OnLoad_iterinstcls005(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;

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

            return JNI_ERR;

        }

    }

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

        return JNI_ERR;

    return JNI_OK;

}

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

}