test/hotspot/jtreg/vmTestbase/nsk/jvmti/scenarios/allocation/AP12/ap12t001/ap12t001.c

/*
 * 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <jvmti.h>
#include "agent_common.h"

#include "nsk_tools.h"
#include "jni_tools.h"
#include "JVMTITools.h"
#include "jvmti_tools.h"

#ifdef __cplusplus
extern "C" {
#endif

#define PASSED  0
#define STATUS_FAILED  2

#define EXP_OBJ_FREE 2

static JNIEnv *jni = NULL;
static jvmtiEnv *jvmti = NULL;
static jvmtiEventCallbacks callbacks;
static jvmtiCapabilities caps;

static volatile int obj_free = 0;
static volatile long obj_count = 0;

static jlong timeout = 0;
static int user_data = 0;
static const char* DEBUGEE_SIGNATURE = "Lnsk/jvmti/scenarios/allocation/AP12/ap12t001;";
static const jlong DEBUGEE_CLASS_TAG = (jlong)1024;

void JNICALL
ObjectFree(jvmtiEnv *jvmti_env, jlong tag) {
    NSK_DISPLAY1("ObjectFree event received for an object with tag %ld\n\n", (long)tag);
    obj_free++;
}

void JNICALL
VMDeath(jvmtiEnv *jvmti_env, JNIEnv *env) {

    NSK_DISPLAY0("VMDeath event received\n");

    if (obj_free != EXP_OBJ_FREE) {
        NSK_COMPLAIN2("Received unexpected number of ObjectFree events: %d\n\t\
expected number: %d", obj_free, EXP_OBJ_FREE);
        exit(95 + STATUS_FAILED);
    }

    exit(95 + PASSED);
}

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

JNIEXPORT void JNICALL
Java_nsk_jvmti_scenarios_allocation_AP12_ap12t001_setTag( JNIEnv* jni, jobject obj, jlong tag) {

    if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(SetTag,
         jvmti, obj, tag))) {
         nsk_jvmti_setFailStatus();
    }
}

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

    jclass debugeeClass = NULL;

    NSK_DISPLAY0("Wait for debugee start\n\n");
    if (!NSK_VERIFY(nsk_jvmti_waitForSync(timeout)))
        return;

    NSK_DISPLAY0("Let debugee to provoke GC\n");
    if (!NSK_VERIFY(nsk_jvmti_resumeSync()))
        return;
    if (!NSK_VERIFY(nsk_jvmti_waitForSync(timeout)))
        return;

    NSK_DISPLAY0("Let debugee to finish\n");
    if (!NSK_VERIFY(nsk_jvmti_resumeSync()))
        return;
}

#ifdef STATIC_BUILD
JNIEXPORT jint JNICALL Agent_OnLoad_ap12t001(JavaVM *jvm, char *options, void *reserved) {
    return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNICALL Agent_OnAttach_ap12t001(JavaVM *jvm, char *options, void *reserved) {
    return Agent_Initialize(jvm, options, reserved);
}
JNIEXPORT jint JNI_OnLoad_ap12t001(JavaVM *jvm, char *options, void *reserved) {
    return JNI_VERSION_1_8;
}
#endif
jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
    /* 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;

    memset(&caps, 0, sizeof(jvmtiCapabilities));
    caps.can_generate_object_free_events = 1;
    caps.can_tag_objects = 1;
    if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(AddCapabilities,
            jvmti, &caps)))
        return JNI_ERR;

    if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(GetCapabilities,
            jvmti, &caps)))
        return JNI_ERR;

    if (!caps.can_generate_object_free_events)
        NSK_DISPLAY0("Warning: generation of object free events is not implemented\n");
    if (!caps.can_tag_objects)
        NSK_DISPLAY0("Warning: tagging objects is not implemented\n");

    /* set event callback */
    NSK_DISPLAY0("setting event callbacks ...\n");
    (void) memset(&callbacks, 0, sizeof(callbacks));

    callbacks.ObjectFree = &ObjectFree;
    callbacks.VMDeath = &VMDeath;

    if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(SetEventCallbacks,
            jvmti, &callbacks, sizeof(callbacks))))
        return JNI_ERR;

    NSK_DISPLAY0("setting event callbacks done\nenabling JVMTI events ...\n");
    if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB4(SetEventNotificationMode,
            jvmti, JVMTI_ENABLE, JVMTI_EVENT_OBJECT_FREE, NULL)))
        return JNI_ERR;
    if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB4(SetEventNotificationMode,
            jvmti, JVMTI_ENABLE, JVMTI_EVENT_VM_DEATH, NULL)))
        return JNI_ERR;
    NSK_DISPLAY0("enabling the events done\n\n");

    if (!NSK_VERIFY(nsk_jvmti_setAgentProc(agentProc, NULL)))
        return JNI_ERR;
    NSK_DISPLAY0("agentProc has been set\n\n");

    return JNI_OK;
}

#ifdef __cplusplus
}
#endif