1 /*

     2  * Copyright 2003 Sun Microsystems, Inc.  All Rights Reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Sun designates this

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

     9  * by Sun in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

    22  * CA 95054 USA or visit www.sun.com if you need additional information or

    23  * have any questions.

    24  */

    25 

    26 /*

    27  * Copyright 2003 Wily Technology, Inc.

    28  */

    29 

    30 #include    <stdlib.h>

    31 #include    <stdio.h>

    32 

    33 #include    "JPLISAssert.h"

    34 #include    "Utilities.h"

    35 #include    "JavaExceptions.h"

    36 

    37 /*

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

    39  */

    40 

    41 void *

    42 allocate(jvmtiEnv * jvmtienv, size_t bytecount) {

    43     void *          resultBuffer    = NULL;

    44     jvmtiError      error           = JVMTI_ERROR_NONE;

    45 

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

    47                                   bytecount,

    48                                   (unsigned char**) &resultBuffer);

    49     jplis_assert(error == JVMTI_ERROR_NONE);

    50     if ( error != JVMTI_ERROR_NONE ) {

    51         resultBuffer = NULL;

    52     }

    53     return resultBuffer;

    54 }

    55 

    56 /**

    57  * Convenience method that deallocates memory.

    58  * Throws assert on error.

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

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

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

    62  */

    63 void

    64 deallocate(jvmtiEnv * jvmtienv, void * buffer) {

    65     jvmtiError  error = JVMTI_ERROR_NONE;

    66 

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

    68                                     (unsigned char*)buffer);

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

    70     return;

    71 }

    72 

    73 /**

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

    75  *  Clears any JNI exceptions before returning

    76  */

    77 jboolean

    78 isInstanceofClassName(  JNIEnv *        jnienv,

    79                         jobject         instance,

    80                         const char *    className) {

    81     jboolean    isInstanceof        = JNI_FALSE;

    82     jboolean    errorOutstanding    = JNI_FALSE;

    83     jclass      classHandle         = NULL;

    84 

    85     jplis_assert(isSafeForJNICalls(jnienv));

    86 

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

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

    89     errorOutstanding = checkForAndClearThrowable(jnienv);

    90     jplis_assert(!errorOutstanding);

    91 

    92     if (!errorOutstanding) {

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

    94         errorOutstanding = checkForAndClearThrowable(jnienv);

    95         jplis_assert(!errorOutstanding);

    96     }

    97 

    98     jplis_assert(isSafeForJNICalls(jnienv));

    99     return isInstanceof;

   100 }

   101 

   102 /* We don't come back from this

   103 */

   104 void

   105 abortJVM(   JNIEnv *        jnienv,

   106             const char *    message) {

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

   108 }