/*

 * Copyright (c) 2003, 2008, 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.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * 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.

 */

/*

 * Copyright 2003 Wily Technology, Inc.

 */

#include    <stdlib.h>

#include    <stdio.h>

#include    "JPLISAssert.h"

#include    "Utilities.h"

#include    "JavaExceptions.h"

/*

 *  This module provides various simple JNI and JVMTI utility functionality.

 */

void *

allocate(jvmtiEnv * jvmtienv, size_t bytecount) {

    void *          resultBuffer    = NULL;

    jvmtiError      error           = JVMTI_ERROR_NONE;

    error = (*jvmtienv)->Allocate(jvmtienv,

                                  bytecount,

                                  (unsigned char**) &resultBuffer);

    /* may be called from any phase */

    jplis_assert(error == JVMTI_ERROR_NONE);

    if ( error != JVMTI_ERROR_NONE ) {

        resultBuffer = NULL;

    }

    return resultBuffer;

}

/**

 * Convenience method that deallocates memory.

 * Throws assert on error.

 * JVMTI Deallocate can only fail due to internal error, that is, this

 * agent has done something wrong or JVMTI has done something wrong.  These

 * errors aren't interesting to a JPLIS agent and so are not returned.

 */

void

deallocate(jvmtiEnv * jvmtienv, void * buffer) {

    jvmtiError  error = JVMTI_ERROR_NONE;

    error = (*jvmtienv)->Deallocate(jvmtienv,

                                    (unsigned char*)buffer);

    /* may be called from any phase */

    jplis_assert_msg(error == JVMTI_ERROR_NONE, "Can't deallocate memory");

    return;

}

/**

 *  Returns whether the passed exception is an instance of the given classname

 *  Clears any JNI exceptions before returning

 */

jboolean

isInstanceofClassName(  JNIEnv *        jnienv,

                        jobject         instance,

                        const char *    className) {

    jboolean    isInstanceof        = JNI_FALSE;

    jboolean    errorOutstanding    = JNI_FALSE;

    jclass      classHandle         = NULL;

    jplis_assert(isSafeForJNICalls(jnienv));

    /* get an instance of unchecked exception for instanceof comparison */

    classHandle = (*jnienv)->FindClass(jnienv, className);

    errorOutstanding = checkForAndClearThrowable(jnienv);

    jplis_assert(!errorOutstanding);

    if (!errorOutstanding) {

        isInstanceof = (*jnienv)->IsInstanceOf(jnienv, instance, classHandle);

        errorOutstanding = checkForAndClearThrowable(jnienv);

        jplis_assert(!errorOutstanding);

    }

    jplis_assert(isSafeForJNICalls(jnienv));

    return isInstanceof;

}

/* We don't come back from this

*/

void

abortJVM(   JNIEnv *        jnienv,

            const char *    message) {

    (*jnienv)->FatalError(jnienv, message);

}