libdtrace_jni/common/dtj_attr.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <dtrace_jni.h>

/*
 * This file creates instances of the Java class
 * org.opensolaris.os.dtrace.InterfaceAttributes.
 */

static const char *
dtj_stability_name(dtrace_stability_t stability)
{
    const char *name;
    switch (stability) {
    case DTRACE_STABILITY_INTERNAL:
        name = "INTERNAL";
        break;
    case DTRACE_STABILITY_PRIVATE:
        name = "PRIVATE";
        break;
    case DTRACE_STABILITY_OBSOLETE:
        name = "OBSOLETE";
        break;
    case DTRACE_STABILITY_EXTERNAL:
        name = "EXTERNAL";
        break;
    case DTRACE_STABILITY_UNSTABLE:
        name = "UNSTABLE";
        break;
    case DTRACE_STABILITY_EVOLVING:
        name = "EVOLVING";
        break;
    case DTRACE_STABILITY_STABLE:
        name = "STABLE";
        break;
    case DTRACE_STABILITY_STANDARD:
        name = "STANDARD";
        break;
    default:
        name = NULL;
    }

    return (name);
}

static const char *
dtj_dependency_class_name(dtrace_class_t class)
{
    const char *name;
    switch (class) {
    case DTRACE_CLASS_UNKNOWN:
        name = "UNKNOWN";
        break;
    case DTRACE_CLASS_CPU:
        name = "CPU";
        break;
    case DTRACE_CLASS_PLATFORM:
        name = "PLATFORM";
        break;
    case DTRACE_CLASS_GROUP:
        name = "GROUP";
        break;
    case DTRACE_CLASS_ISA:
        name = "ISA";
        break;
    case DTRACE_CLASS_COMMON:
        name = "COMMON";
        break;
    default:
        name = NULL;
    }

    return (name);
}

jobject
dtj_new_attribute(dtj_java_consumer_t *jc, const dtrace_attribute_t *attr)
{
    JNIEnv *jenv = jc->dtjj_jenv;

    const char *name;

    jstring jname = NULL;
    jobject jattr = NULL; /* return value */

    jattr = (*jenv)->NewObject(jenv, g_attr_jc, g_attrinit_jm);
    if ((*jenv)->ExceptionCheck(jenv)) {
        return (NULL);
    }

    /* name stability */
    name = dtj_stability_name(attr->dtat_name);
    if (!name) {
        dtj_throw_illegal_argument(jenv,
            "unexpected name stability value: %d",
            attr->dtat_name);
        (*jenv)->DeleteLocalRef(jenv, jattr);
        return (NULL);
    }
    jname = (*jenv)->NewStringUTF(jenv, name);
    if ((*jenv)->ExceptionCheck(jenv)) {
        (*jenv)->DeleteLocalRef(jenv, jattr);
        return (NULL);
    }
    (*jenv)->CallVoidMethod(jenv, jattr, g_attrset_name_jm, jname);
    (*jenv)->DeleteLocalRef(jenv, jname);
    if ((*jenv)->ExceptionCheck(jenv)) {
        (*jenv)->DeleteLocalRef(jenv, jattr);
        return (NULL);
    }

    /* data stability */
    name = dtj_stability_name(attr->dtat_data);
    if (!name) {
        dtj_throw_illegal_argument(jenv,
            "unexpected data stability value: %d",
            attr->dtat_data);
        (*jenv)->DeleteLocalRef(jenv, jattr);
        return (NULL);
    }
    jname = (*jenv)->NewStringUTF(jenv, name);
    if ((*jenv)->ExceptionCheck(jenv)) {
        (*jenv)->DeleteLocalRef(jenv, jattr);
        return (NULL);
    }
    (*jenv)->CallVoidMethod(jenv, jattr, g_attrset_data_jm, jname);
    (*jenv)->DeleteLocalRef(jenv, jname);
    if ((*jenv)->ExceptionCheck(jenv)) {
        (*jenv)->DeleteLocalRef(jenv, jattr);
        return (NULL);
    }

    /* dependency class */
    name = dtj_dependency_class_name(attr->dtat_class);
    if (!name) {
        dtj_throw_illegal_argument(jenv,
            "unexpected dependency class value: %d",
            attr->dtat_class);
        (*jenv)->DeleteLocalRef(jenv, jattr);
        return (NULL);
    }
    jname = (*jenv)->NewStringUTF(jenv, name);
    if ((*jenv)->ExceptionCheck(jenv)) {
        (*jenv)->DeleteLocalRef(jenv, jattr);
        return (NULL);
    }
    (*jenv)->CallVoidMethod(jenv, jattr, g_attrset_class_jm, jname);
    (*jenv)->DeleteLocalRef(jenv, jname);
    if ((*jenv)->ExceptionCheck(jenv)) {
        (*jenv)->DeleteLocalRef(jenv, jattr);
        return (NULL);
    }

    return (jattr);
}