/*

 * 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 "JVMTITools.h"

extern "C" {

#define PASSED 0

#define STATUS_FAILED 2

#define MILLIS_PER_MINUTE (60 * 1000)

static jvmtiEnv *jvmti = NULL;

static jvmtiCapabilities caps;

static jint result = PASSED;

static jrawMonitorID monitor;

static jrawMonitorID wait_lock;

static jlong wait_time;

#ifdef STATIC_BUILD

JNIEXPORT jint JNICALL Agent_OnLoad_rawmnwait005(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNICALL Agent_OnAttach_rawmnwait005(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNI_OnLoad_rawmnwait005(JavaVM *jvm, char *options, void *reserved) {

    return JNI_VERSION_1_8;

}

#endif

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

    jint res;

    jvmtiError err;

    if (options != NULL && strcmp(options, "printdump") == 0) {

        printdump = JNI_TRUE;

    }

    res = jvm->GetEnv((void **) &jvmti, JVMTI_VERSION_1_1);

    if (res != JNI_OK || jvmti == NULL) {

        printf("Wrong result of a valid call to GetEnv!\n");

        return JNI_ERR;

    }

    err = jvmti->GetPotentialCapabilities(&caps);

    if (err != JVMTI_ERROR_NONE) {

        printf("(GetPotentialCapabilities) unexpected error: %s (%d)\n",

               TranslateError(err), err);

        return JNI_ERR;

    }

    err = jvmti->AddCapabilities(&caps);

    if (err != JVMTI_ERROR_NONE) {

        printf("(AddCapabilities) unexpected error: %s (%d)\n",

               TranslateError(err), err);

        return JNI_ERR;

    }

    err = jvmti->GetCapabilities(&caps);

    if (err != JVMTI_ERROR_NONE) {

        printf("(GetCapabilities) unexpected error: %s (%d)\n",

               TranslateError(err), err);

        return JNI_ERR;

    }

    if (!caps.can_signal_thread) {

        printf("Warning: InterruptThread is not implemented\n");

    }

    return JNI_OK;

}

static void JNICALL

test_thread(jvmtiEnv* jvmti, JNIEnv* jni, void *unused) {

    jvmtiError err;

    const char* const thread_name = "test thread";

    err = jvmti->RawMonitorEnter(monitor);

    if (err != JVMTI_ERROR_NONE) {

        printf("(RawMonitorEnter#test) unexpected error: %s (%d)\n",

               TranslateError(err), err);

        result = STATUS_FAILED;

    }

    if (printdump == JNI_TRUE) {

        printf(">>> [%s] acquired lock for 'monitor' ...\n", thread_name);

    }

    err = jvmti->RawMonitorEnter(wait_lock);

    if (err != JVMTI_ERROR_NONE) {

        printf("(RawMonitorEnter#wait) unexpected error: %s (%d)\n",

               TranslateError(err), err);

        result = STATUS_FAILED;

        return;

    }

    if (printdump == JNI_TRUE) {

        printf(">>> [%s] acquired lock for 'wait_lock' ...\n", thread_name);

        printf(">>> [%s] notifying main thread (wait_lock.notify) ...\n", thread_name);

    }

    err = jvmti->RawMonitorNotify(wait_lock);

    if (err != JVMTI_ERROR_NONE) {

        printf("(RawMonitorWait#wait) unexpected error: %s (%d)\n",

               TranslateError(err), err);

        result = STATUS_FAILED;

        return;

    }

    err = jvmti->RawMonitorExit(wait_lock);

    if (err != JVMTI_ERROR_NONE) {

        printf("(RawMonitorExit#wait) unexpected error: %s (%d)\n",

               TranslateError(err), err);

        result = STATUS_FAILED;

        return;

    }

    if (printdump == JNI_TRUE) {

        printf(">>> [%s] waiting for interrupt ...\n", thread_name);

    }

    err = jvmti->RawMonitorWait(monitor, wait_time);

    if (err != JVMTI_ERROR_INTERRUPT) {

        printf("Error expected: JVMTI_ERROR_INTERRUPT,\n");

        printf("\tactual: %s (%d)\n", TranslateError(err), err);

        result = STATUS_FAILED;

    }

    err = jvmti->RawMonitorExit(monitor);

    if (err != JVMTI_ERROR_NONE) {

        printf("(RawMonitorExit#test) unexpected error: %s (%d)\n",

               TranslateError(err), err);

        result = STATUS_FAILED;

    }

    if (printdump == JNI_TRUE) {

        printf(">>> [%s] all done\n", thread_name);

    }

}

JNIEXPORT jint JNICALL

Java_nsk_jvmti_RawMonitorWait_rawmnwait005_check(JNIEnv *env,

        jclass cls, jthread thr, jint wtime) {

    jvmtiError err;

    const char* const thread_name = "main thread";

    if (!caps.can_signal_thread) {

        return result;

    }

    wait_time = wtime * MILLIS_PER_MINUTE;

    if (jvmti == NULL) {

        printf("JVMTI client was not properly loaded!\n");

        return STATUS_FAILED;

    }

    err = jvmti->CreateRawMonitor("test monitor", &monitor);

    if (err != JVMTI_ERROR_NONE) {

        printf("(CreateRawMonitor#test) unexpected error: %s (%d)\n",

               TranslateError(err), err);

        return STATUS_FAILED;

    }

    // 'wait_lock' is used to notify current thread when child thread ('test_thread')

    //  is ready. This in particular means 'test_thread' is waiting for notification

    //  of the raw monitor 'monitor' and current thread can now interrupt 'test_thread'.

    //

    err = jvmti->CreateRawMonitor("wait lock", &wait_lock);

    if (err != JVMTI_ERROR_NONE) {

        printf("(CreateRawMonitor#wait) unexpected error: %s (%d)\n",

               TranslateError(err), err);

        return STATUS_FAILED;

    }

    // get exclusive ownership of 'wait_lock' monitor before

    //  starting 'test_thread' to avoid following race condition:

    //   'test_thread'     |   current thread

    //   -------------------------------------

    //                     | RunAgentThread(..., test_thread, ...)

    //    wait_lock.enter  |

    //    wait_lock.notify |

    //                     | wait_lock.enter

    //                     | wait_lock.wait(0)

    //    ...              |

    //                     |  ... will wait forever ...

    //

    // See also 6399368 test bug.

    //

    err = jvmti->RawMonitorEnter(wait_lock);

    if (err != JVMTI_ERROR_NONE) {

        printf("(RawMonitorEnter#wait) unexpected error: %s (%d)\n",

               TranslateError(err), err);

        return STATUS_FAILED;

    }

    if (printdump == JNI_TRUE) {

        printf(">>> [%s] acquired lock for 'wait_lock' ... \n", thread_name);

    }

    if (printdump == JNI_TRUE) {

        printf(">>> [%s] starting test thread ...\n", thread_name);

    }

    err = jvmti->RunAgentThread(thr, test_thread, NULL,

                                JVMTI_THREAD_NORM_PRIORITY);

    if (err != JVMTI_ERROR_NONE) {

        printf("(RunDebugThread) unexpected error: %s (%d)\n",

               TranslateError(err), err);

        return STATUS_FAILED;

    }

    if (printdump == JNI_TRUE) {

        printf(">>> [%s] waiting for test thread to run (do wait_lock.wait)...\n", thread_name);

    }

    err = jvmti->RawMonitorWait(wait_lock, (jlong)0);

    if (err != JVMTI_ERROR_NONE) {

        printf("(RawMonitorWait#wait) unexpected error: %s (%d)\n",

               TranslateError(err), err);

        return STATUS_FAILED;

    }

    if (printdump == JNI_TRUE) {

        printf(">>> [%s] got notification from test thread ...\n", thread_name);

    }

    err = jvmti->RawMonitorEnter(monitor);

    if (err != JVMTI_ERROR_NONE) {

        printf("(RawMonitorEnter#test) unexpected error: %s (%d)\n",

               TranslateError(err), err);

        return STATUS_FAILED;

    }

    if (printdump == JNI_TRUE) {

        printf(">>> [%s] acquired lock for 'monitor' ... \n", thread_name);

    }

    if (printdump == JNI_TRUE) {

        printf(">>> [%s] interrupting test thread ...\n", thread_name);

    }

    err = jvmti->InterruptThread(thr);

    if (err != JVMTI_ERROR_NONE) {

        printf("(InterruptThread) unexpected error: %s (%d)\n",

               TranslateError(err), err);

        result = STATUS_FAILED;

    }

    err = jvmti->RawMonitorExit(monitor);

    if (err != JVMTI_ERROR_NONE) {

        printf("(RawMonitorExit#test) unexpected error: %s (%d)\n",

               TranslateError(err), err);

        result = STATUS_FAILED;

    }

    if (printdump == JNI_TRUE) {

        printf(">>> [%s] all done\n", thread_name);

    }

    return result;

}

}