1 /*
   2  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. 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.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *

 599 jclass
 600 JvmtiEnvBase::get_jni_class_non_null(klassOop k) {
 601   assert(k != NULL, "k != NULL");
 602   return (jclass)jni_reference(Klass::cast(k)->java_mirror());
 603 }
 604 
 605 #ifndef JVMTI_KERNEL
 606 
 607 //
 608 // Field Information
 609 //
 610 
 611 bool
 612 JvmtiEnvBase::get_field_descriptor(klassOop k, jfieldID field, fieldDescriptor* fd) {
 613   if (!jfieldIDWorkaround::is_valid_jfieldID(k, field)) {
 614     return false;
 615   }
 616   bool found = false;
 617   if (jfieldIDWorkaround::is_static_jfieldID(field)) {
 618     JNIid* id = jfieldIDWorkaround::from_static_jfieldID(field);
 619     int offset = id->offset();
 620     klassOop holder = id->holder();
 621     found = instanceKlass::cast(holder)->find_local_field_from_offset(offset, true, fd);
 622   } else {
 623     // Non-static field. The fieldID is really the offset of the field within the object.
 624     int offset = jfieldIDWorkaround::from_instance_jfieldID(k, field);
 625     found = instanceKlass::cast(k)->find_field_from_offset(offset, false, fd);
 626   }
 627   return found;
 628 }
 629 
 630 //
 631 // Object Monitor Information
 632 //
 633 
 634 //
 635 // Count the number of objects for a lightweight monitor. The hobj
 636 // parameter is object that owns the monitor so this routine will
 637 // count the number of times the same object was locked by frames
 638 // in java_thread.
 639 //
 640 jint
 641 JvmtiEnvBase::count_locked_objects(JavaThread *java_thread, Handle hobj) {

   1 /*
   2  * Copyright (c) 2003, 2011, Oracle and/or its affiliates. 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.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *

 599 jclass
 600 JvmtiEnvBase::get_jni_class_non_null(klassOop k) {
 601   assert(k != NULL, "k != NULL");
 602   return (jclass)jni_reference(Klass::cast(k)->java_mirror());
 603 }
 604 
 605 #ifndef JVMTI_KERNEL
 606 
 607 //
 608 // Field Information
 609 //
 610 
 611 bool
 612 JvmtiEnvBase::get_field_descriptor(klassOop k, jfieldID field, fieldDescriptor* fd) {
 613   if (!jfieldIDWorkaround::is_valid_jfieldID(k, field)) {
 614     return false;
 615   }
 616   bool found = false;
 617   if (jfieldIDWorkaround::is_static_jfieldID(field)) {
 618     JNIid* id = jfieldIDWorkaround::from_static_jfieldID(field);
 619     found = id->find_local_field(fd);


 620   } else {
 621     // Non-static field. The fieldID is really the offset of the field within the object.
 622     int offset = jfieldIDWorkaround::from_instance_jfieldID(k, field);
 623     found = instanceKlass::cast(k)->find_field_from_offset(offset, false, fd);
 624   }
 625   return found;
 626 }
 627 
 628 //
 629 // Object Monitor Information
 630 //
 631 
 632 //
 633 // Count the number of objects for a lightweight monitor. The hobj
 634 // parameter is object that owns the monitor so this routine will
 635 // count the number of times the same object was locked by frames
 636 // in java_thread.
 637 //
 638 jint
 639 JvmtiEnvBase::count_locked_objects(JavaThread *java_thread, Handle hobj) {