1 /*
   2  * Copyright (c) 2001, 2017, 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  *

  44 void CollectedHeap::post_allocation_setup_common(Klass* klass,
  45                                                  HeapWord* obj_ptr) {
  46   post_allocation_setup_no_klass_install(klass, obj_ptr);
  47   oop obj = (oop)obj_ptr;
  48 #if ! INCLUDE_ALL_GCS
  49   obj->set_klass(klass);
  50 #else
  51   // Need a release store to ensure array/class length, mark word, and
  52   // object zeroing are visible before setting the klass non-NULL, for
  53   // concurrent collectors.
  54   obj->release_set_klass(klass);
  55 #endif
  56 }
  57 
  58 void CollectedHeap::post_allocation_setup_no_klass_install(Klass* klass,
  59                                                            HeapWord* obj_ptr) {
  60   oop obj = (oop)obj_ptr;
  61 
  62   assert(obj != NULL, "NULL object pointer");
  63   if (UseBiasedLocking && (klass != NULL)) {
  64     obj->set_mark(klass->prototype_header());
  65   } else {
  66     // May be bootstrapping
  67     obj->set_mark(markOopDesc::prototype());
  68   }
  69 }
  70 
  71 // Support for jvmti and dtrace
  72 inline void post_allocation_notify(Klass* klass, oop obj, int size) {
  73   // support low memory notifications (no-op if not enabled)
  74   LowMemoryDetector::detect_low_memory_for_collected_pools();
  75 
  76   // support for JVMTI VMObjectAlloc event (no-op if not enabled)
  77   JvmtiExport::vm_object_alloc_event_collector(obj);
  78 
  79   if (DTraceAllocProbes) {
  80     // support for Dtrace object alloc event (no-op most of the time)
  81     if (klass != NULL && klass->name() != NULL) {
  82       SharedRuntime::dtrace_object_alloc(obj, size);
  83     }
  84   }
  85 }
  86 
  87 void CollectedHeap::post_allocation_setup_obj(Klass* klass,

   1 /*
   2  * Copyright (c) 2001, 2018, 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  *

  44 void CollectedHeap::post_allocation_setup_common(Klass* klass,
  45                                                  HeapWord* obj_ptr) {
  46   post_allocation_setup_no_klass_install(klass, obj_ptr);
  47   oop obj = (oop)obj_ptr;
  48 #if ! INCLUDE_ALL_GCS
  49   obj->set_klass(klass);
  50 #else
  51   // Need a release store to ensure array/class length, mark word, and
  52   // object zeroing are visible before setting the klass non-NULL, for
  53   // concurrent collectors.
  54   obj->release_set_klass(klass);
  55 #endif
  56 }
  57 
  58 void CollectedHeap::post_allocation_setup_no_klass_install(Klass* klass,
  59                                                            HeapWord* obj_ptr) {
  60   oop obj = (oop)obj_ptr;
  61 
  62   assert(obj != NULL, "NULL object pointer");
  63   if (UseBiasedLocking && (klass != NULL)) {
  64     obj->set_mark_raw(klass->prototype_header());
  65   } else {
  66     // May be bootstrapping
  67     obj->set_mark_raw(markOopDesc::prototype());
  68   }
  69 }
  70 
  71 // Support for jvmti and dtrace
  72 inline void post_allocation_notify(Klass* klass, oop obj, int size) {
  73   // support low memory notifications (no-op if not enabled)
  74   LowMemoryDetector::detect_low_memory_for_collected_pools();
  75 
  76   // support for JVMTI VMObjectAlloc event (no-op if not enabled)
  77   JvmtiExport::vm_object_alloc_event_collector(obj);
  78 
  79   if (DTraceAllocProbes) {
  80     // support for Dtrace object alloc event (no-op most of the time)
  81     if (klass != NULL && klass->name() != NULL) {
  82       SharedRuntime::dtrace_object_alloc(obj, size);
  83     }
  84   }
  85 }
  86 
  87 void CollectedHeap::post_allocation_setup_obj(Klass* klass,