/*

 * Copyright (c) 2003, 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"

extern "C" {

#define STATUS_FAILED 2

#define PASSED 0

/* counter for the wrong NativeMethodBind events

   received during non-start or non-live phase */

static volatile int wrongBindEv = 0;

static volatile jint result = PASSED;

static jvmtiEnv *jvmti = NULL;

static jvmtiEventCallbacks callbacks;

static jrawMonitorID countLock;

static void lock(jvmtiEnv *jvmti_env, JNIEnv *jni_env) {

    if (!NSK_JVMTI_VERIFY(jvmti_env->RawMonitorEnter(countLock)))

        jni_env->FatalError("failed to enter a raw monitor\n");

}

static void unlock(jvmtiEnv *jvmti_env, JNIEnv *jni_env) {

    if (!NSK_JVMTI_VERIFY(jvmti_env->RawMonitorExit(countLock)))

        jni_env->FatalError("failed to exit a raw monitor\n");

}

/** callback functions **/

void JNICALL

NativeMethodBind(jvmtiEnv *jvmti_env, JNIEnv* jni_env, jthread thread,

        jmethodID method, void *addr, void **new_addr) {

    jvmtiPhase phase;

    char *methNam = NULL, *methSig = NULL;

    lock(jvmti_env, jni_env);

    if (!NSK_JVMTI_VERIFY(jvmti_env->GetPhase(&phase))) {

        result = STATUS_FAILED;

        NSK_COMPLAIN0(

            "TEST FAILED: unable to obtain phase of the VM execution\n"

            "\tduring NativeMethodBind callback\n\n");

        unlock(jvmti_env, jni_env);

        return;

    }

    if (phase != JVMTI_PHASE_LIVE && phase != JVMTI_PHASE_START) {

        unlock(jvmti_env, jni_env);

        return;

    }

    if (!NSK_JVMTI_VERIFY(jvmti_env->GetMethodName(method, &methNam, &methSig, NULL))) {

        result = STATUS_FAILED;

        NSK_COMPLAIN0("TEST FAILED: unable to get method name during NativeMethodBind callback\n\n");

    }

    else

        NSK_DISPLAY2("NativeMethodBind received for \"%s %s\"\n",

            methNam, methSig);

        if (!NSK_JVMTI_VERIFY(jvmti_env->Deallocate((unsigned char*) methNam)))

            NSK_COMPLAIN0("TEST FAILED: unable to deallocate memory pointed to method name\n\n");

        if (!NSK_JVMTI_VERIFY(jvmti_env->Deallocate((unsigned char*) methSig)))

            NSK_COMPLAIN0("TEST FAILED: unable to deallocate memory pointed to method signature\n\n");

    unlock(jvmti_env, jni_env);

}

void JNICALL

VMDeath(jvmtiEnv *jvmti_env, JNIEnv *env) {

    NSK_DISPLAY0("VMDeath event received\n");

    if (wrongBindEv != 0) {

        NSK_COMPLAIN1(

            "TEST FAILED: there are %d NativeMethodBind events\n"

            "sent during non-start or non-live phase of the VM execution\n",

            wrongBindEv);

    }

    if (result == STATUS_FAILED)

        exit(95 + STATUS_FAILED);

}

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

/* dummy method used only to provoke NativeMethodBind events */

JNIEXPORT jint JNICALL

Java_nsk_jvmti_NativeMethodBind_nativemethbind002_nativeMethod(

        JNIEnv *env, jobject obj) {

    NSK_DISPLAY0("inside the nativeMethod()\n\n");

    return PASSED;

}

#ifdef STATIC_BUILD

JNIEXPORT jint JNICALL Agent_OnLoad_nativemethbind002(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNICALL Agent_OnAttach_nativemethbind002(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNI_OnLoad_nativemethbind002(JavaVM *jvm, char *options, void *reserved) {

    return JNI_VERSION_1_8;

}

#endif

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

    jvmtiCapabilities caps;

    /* 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;

    /* create a raw monitor */

    if (!NSK_JVMTI_VERIFY(jvmti->CreateRawMonitor("_counter_lock", &countLock)))

        return JNI_ERR;

    /* add capability to generate compiled method events */

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

    caps.can_generate_native_method_bind_events = 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_native_method_bind_events)

        NSK_DISPLAY0("Warning: generation of native method bind events is not implemented\n");

    /* set event callback */

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

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

    callbacks.NativeMethodBind = &NativeMethodBind;

    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_NATIVE_METHOD_BIND,

                                                          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");

    return JNI_OK;

}

}