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/*
* Copyright (c) 2003, 2005, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Oracle nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* JVMTI tag definitions. */
/*
* JVMTI tags are jlongs (64 bits) and how the hprof information is
* turned into a tag and/or extracted from a tag is here.
*
* Currently a special TAG_CHECK is placed in the high order 32 bits of
* the tag as a check.
*
*/
#include "hprof.h"
#define TAG_CHECK 0xfad4dead
jlong
tag_create(ObjectIndex object_index)
{
jlong tag;
HPROF_ASSERT(object_index != 0);
tag = TAG_CHECK;
tag = (tag << 32) | object_index;
return tag;
}
ObjectIndex
tag_extract(jlong tag)
{
HPROF_ASSERT(tag != (jlong)0);
if ( ((tag >> 32) & 0xFFFFFFFF) != TAG_CHECK) {
HPROF_ERROR(JNI_TRUE, "JVMTI tag value is not 0 and missing TAG_CHECK");
}
return (ObjectIndex)(tag & 0xFFFFFFFF);
}
/* Tag a new jobject */
void
tag_new_object(jobject object, ObjectKind kind, SerialNumber thread_serial_num,
jint size, SiteIndex site_index)
{
ObjectIndex object_index;
jlong tag;
HPROF_ASSERT(site_index!=0);
/* New object for this site. */
object_index = object_new(site_index, size, kind, thread_serial_num);
/* Create and set the tag. */
tag = tag_create(object_index);
setTag(object, tag);
LOG3("tag_new_object", "tag", (int)tag);
}
/* Tag a jclass jobject if it hasn't been tagged. */
void
tag_class(JNIEnv *env, jclass klass, ClassIndex cnum,
SerialNumber thread_serial_num, SiteIndex site_index)
{
ObjectIndex object_index;
/* If the ClassIndex has an ObjectIndex, then we have tagged it. */
object_index = class_get_object_index(cnum);
if ( object_index == 0 ) {
jint size;
jlong tag;
HPROF_ASSERT(site_index!=0);
/* If we don't know the size of a java.lang.Class object, get it */
size = gdata->system_class_size;
if ( size == 0 ) {
size = (jint)getObjectSize(klass);
gdata->system_class_size = size;
}
/* Tag this java.lang.Class object if it hasn't been already */
tag = getTag(klass);
if ( tag == (jlong)0 ) {
/* New object for this site. */
object_index = object_new(site_index, size, OBJECT_CLASS,
thread_serial_num);
/* Create and set the tag. */
tag = tag_create(object_index);
setTag(klass, tag);
} else {
/* Get the ObjectIndex from the tag. */
object_index = tag_extract(tag);
}
/* Record this object index in the Class table */
class_set_object_index(cnum, object_index);
}
}
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