/*

 * 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

#define SAMPLE_TAG ((jlong) 222222)

extern "C" {

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

/* scaffold objects */

static jlong timeout = 0;

/* test objects */

static jobject testedObject = NULL;

static jobject testedInstance = NULL;

static jclass testedClass = NULL;

static int ObjectsCount = 0;

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

/** callback functions **/

static jvmtiIterationControl JNICALL heap_object_callback

    (jlong class_tag, jlong size, jlong* tag_ptr, void* user_data)

{

    char buffer[32];

    if (*tag_ptr != 0) {

        NSK_DISPLAY1("tag = %s\n", jlong_to_string(*tag_ptr, buffer));

        if (*tag_ptr == SAMPLE_TAG) {

            ObjectsCount++;

        } else {

            NSK_COMPLAIN1("testedObject tagged incorrectly, expected=%s,",

                jlong_to_string(SAMPLE_TAG, buffer));

            NSK_COMPLAIN1(" got=%s\n", jlong_to_string(*tag_ptr, buffer));

            nsk_jvmti_setFailStatus();

        }

    }

    return JVMTI_ITERATION_CONTINUE;

}

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

static int prepare(JNIEnv* jni) {

    const char* CLASS_NAME = "nsk/jvmti/scenarios/multienv/MA04/ma04t002";

    const char* FIELD_NAME = "testedObject2";

    const char* FIELD_SIGNATURE = "Ljava/lang/Object;";

    const char* INSTANCE_NAME = "testedInstance2";

    const char* INSTANCE_SIGNATURE = "Lnsk/jvmti/scenarios/multienv/MA04/ma04t002;";

    jfieldID fid = NULL;

    NSK_DISPLAY0("Obtain tested object from a static field of debugee class\n");

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

    if (!NSK_JNI_VERIFY(jni, (testedClass =

            NSK_CPP_STUB2(FindClass, jni, CLASS_NAME)) != NULL))

        return NSK_FALSE;

    if (!NSK_JNI_VERIFY(jni, (testedClass = (jclass)

            NSK_CPP_STUB2(NewGlobalRef, jni, testedClass)) != NULL))

        return NSK_FALSE;

    NSK_DISPLAY2("Find field: %s:%s\n", FIELD_NAME, FIELD_SIGNATURE);

    if (!NSK_JNI_VERIFY(jni, (fid =

            NSK_CPP_STUB4(GetStaticFieldID, jni, testedClass,

                FIELD_NAME, FIELD_SIGNATURE)) != NULL))

        return NSK_FALSE;

    if (!NSK_JNI_VERIFY(jni, (testedObject =

            NSK_CPP_STUB3(GetStaticObjectField, jni, testedClass, fid)) != NULL))

        return NSK_FALSE;

    NSK_DISPLAY2("Find class instance: %s:%s\n",

        INSTANCE_NAME, INSTANCE_SIGNATURE);

    if (!NSK_JNI_VERIFY(jni, (fid =

            NSK_CPP_STUB4(GetStaticFieldID, jni, testedClass,

                INSTANCE_NAME, INSTANCE_SIGNATURE)) != NULL))

        return NSK_FALSE;

    if (!NSK_JNI_VERIFY(jni, (testedInstance =

            NSK_CPP_STUB3(GetStaticObjectField, jni, testedClass, fid)) != NULL))

        return NSK_FALSE;

    return NSK_TRUE;

}

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

/** Agent algorithm. */

static void JNICALL

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

    jint dummy;

    if (!nsk_jvmti_waitForSync(timeout))

        return;

    if (!prepare(jni)) {

        nsk_jvmti_setFailStatus();

        return;

    }

    NSK_DISPLAY0("Testcase #1: check that there are no tagged objects\n");

    ObjectsCount = 0;

    if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB4(IterateOverHeap, jvmti,

            JVMTI_HEAP_OBJECT_EITHER, heap_object_callback, &dummy))) {

        nsk_jvmti_setFailStatus();

        return;

    }

    NSK_DISPLAY1("ObjectsCount = %d\n", ObjectsCount);

    if (ObjectsCount != 0) {

        NSK_COMPLAIN1("Some objects were unexpectedly tagged: %d\n",

            ObjectsCount);

        nsk_jvmti_setFailStatus();

    }

    ObjectsCount = 0;

    if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB4(IterateOverHeap, jvmti,

            JVMTI_HEAP_OBJECT_TAGGED, heap_object_callback, &dummy))) {

        nsk_jvmti_setFailStatus();

        return;

    }

    NSK_DISPLAY1("ObjectsCount = %d\n", ObjectsCount);

    if (ObjectsCount != 0) {

        NSK_COMPLAIN1("Some objects were unexpectedly tagged: %d\n",

            ObjectsCount);

        nsk_jvmti_setFailStatus();

    }

    ObjectsCount = 0;

    if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB5(IterateOverInstancesOfClass, jvmti,

            testedClass, JVMTI_HEAP_OBJECT_EITHER, heap_object_callback, &dummy))) {

        nsk_jvmti_setFailStatus();

        return;

    }

    NSK_DISPLAY1("ObjectsCount = %d\n", ObjectsCount);

    if (ObjectsCount != 0) {

        NSK_COMPLAIN1("Some class instances were unexpectedly tagged: %d\n",

            ObjectsCount);

        nsk_jvmti_setFailStatus();

    }

    ObjectsCount = 0;

    if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB5(IterateOverInstancesOfClass, jvmti,

            testedClass, JVMTI_HEAP_OBJECT_EITHER, heap_object_callback, &dummy))) {

        nsk_jvmti_setFailStatus();

        return;

    }

    NSK_DISPLAY1("ObjectsCount = %d\n", ObjectsCount);

    if (ObjectsCount != 0) {

        NSK_COMPLAIN1("Some class instances were unexpectedly tagged: %d\n",

            ObjectsCount);

        nsk_jvmti_setFailStatus();

    }

    if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(SetTag, jvmti, testedObject,

            SAMPLE_TAG))) {

        nsk_jvmti_setFailStatus();

        return;

    }

    if (!NSK_VERIFY(nsk_jvmti_resumeSync()))

        return;

    if (!NSK_VERIFY(nsk_jvmti_waitForSync(timeout)))

        return;

    NSK_DISPLAY0("Testcase #2: check that there is only one object tagged\n");

    ObjectsCount = 0;

    if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB4(IterateOverHeap, jvmti,

            JVMTI_HEAP_OBJECT_EITHER, heap_object_callback, &dummy))) {

        nsk_jvmti_setFailStatus();

        return;

    }

    NSK_DISPLAY1("ObjectsCount = %d\n", ObjectsCount);

    if (ObjectsCount != 1) {

        NSK_COMPLAIN1("Expected 1 object to be tagged: %d\n", ObjectsCount);

        nsk_jvmti_setFailStatus();

    }

    ObjectsCount = 0;

    if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB4(IterateOverHeap, jvmti,

            JVMTI_HEAP_OBJECT_TAGGED, heap_object_callback, &dummy))) {

        nsk_jvmti_setFailStatus();

        return;

    }

    NSK_DISPLAY1("ObjectsCount = %d\n", ObjectsCount);

    if (ObjectsCount != 1) {

        NSK_COMPLAIN1("Expected 1 object to be tagged: %d\n", ObjectsCount);

        nsk_jvmti_setFailStatus();

    }

    ObjectsCount = 0;

    if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB4(IterateOverHeap, jvmti,

            JVMTI_HEAP_OBJECT_UNTAGGED, heap_object_callback, &dummy))) {

        nsk_jvmti_setFailStatus();

        return;

    }

    NSK_DISPLAY1("ObjectsCount = %d\n", ObjectsCount);

    if (ObjectsCount != 0) {

        NSK_COMPLAIN1("Some tagged objects were unexpectedly shown as untagged: %d\n",

            ObjectsCount);

        nsk_jvmti_setFailStatus();

    }

    if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(SetTag, jvmti, testedInstance,

            SAMPLE_TAG))) {

        nsk_jvmti_setFailStatus();

        return;

    }

    if (!NSK_VERIFY(nsk_jvmti_resumeSync()))

        return;

    if (!NSK_VERIFY(nsk_jvmti_waitForSync(timeout)))

        return;

    NSK_DISPLAY0("Testcase #3: check that there is only one class object tagged\n");

    ObjectsCount = 0;

    if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB5(IterateOverInstancesOfClass, jvmti,

            testedClass, JVMTI_HEAP_OBJECT_EITHER, heap_object_callback, &dummy))) {

        nsk_jvmti_setFailStatus();

        return;

    }

    NSK_DISPLAY1("ObjectsCount = %d\n", ObjectsCount);

    if (ObjectsCount != 1) {

        NSK_COMPLAIN1("Expected 1 class instance to be tagged: %d\n",

            ObjectsCount);

        nsk_jvmti_setFailStatus();

    }

    ObjectsCount = 0;

    if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB5(IterateOverInstancesOfClass, jvmti,

            testedClass, JVMTI_HEAP_OBJECT_EITHER, heap_object_callback, &dummy))) {

        nsk_jvmti_setFailStatus();

        return;

    }

    NSK_DISPLAY1("ObjectsCount = %d\n", ObjectsCount);

    if (ObjectsCount != 1) {

        NSK_COMPLAIN1("Expected 1 class instance to be tagged: %d\n",

            ObjectsCount);

        nsk_jvmti_setFailStatus();

    }

    ObjectsCount = 0;

    if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB4(IterateOverHeap, jvmti,

            JVMTI_HEAP_OBJECT_UNTAGGED, heap_object_callback, &dummy))) {

        nsk_jvmti_setFailStatus();

        return;

    }

    NSK_DISPLAY1("ObjectsCount = %d\n", ObjectsCount);

    if (ObjectsCount != 0) {

        NSK_COMPLAIN1("Some tagged class instances were unexpectedly shown as untagged: %d\n",

            ObjectsCount);

        nsk_jvmti_setFailStatus();

    }

    NSK_TRACE(NSK_CPP_STUB2(DeleteGlobalRef, jni, testedClass));

    if (!nsk_jvmti_resumeSync())

        return;

}

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

/** Agent library initialization. */

#ifdef STATIC_BUILD

JNIEXPORT jint JNICALL Agent_OnLoad_ma04t002a(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNICALL Agent_OnAttach_ma04t002a(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNI_OnLoad_ma04t002a(JavaVM *jvm, char *options, void *reserved) {

    return JNI_VERSION_1_8;

}

#endif

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

    jvmtiEnv* jvmti = NULL;

    jvmtiEventCallbacks callbacks;

    jvmtiCapabilities caps;

    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;

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

    caps.can_tag_objects = 1;

    caps.can_generate_object_free_events = 1;

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

        return JNI_ERR;

    }

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

        return JNI_ERR;

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

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

        return JNI_ERR;

    if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB4(SetEventNotificationMode,

            jvmti, JVMTI_ENABLE, JVMTI_EVENT_OBJECT_FREE, NULL)))

        return JNI_ERR;

    return JNI_OK;

}

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

}