jdk8-mips64-public/hotspot: src/share/vm/runtime/handles.cpp@eef07cd490d4 (annotated)

src/share/vm/runtime/handles.cpp@eef07cd490d4 (annotated)

src/share/vm/runtime/handles.cpp

Wed, 03 Jul 2019 20:42:37 +0800

author: aoqi
date: Wed, 03 Jul 2019 20:42:37 +0800
changeset 9637: eef07cd490d4
parent 6876: 710a3c8b516e
child 9931: fd44df5e3bc3
permissions: -rw-r--r--

Merge

 /*
  * Copyright (c) 1997, 2014, 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.
  *
  * 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.
  *
  */
 #include "precompiled.hpp"
 #include "memory/allocation.inline.hpp"
 #include "oops/constantPool.hpp"
 #include "oops/oop.inline.hpp"
 #include "runtime/handles.inline.hpp"
 #include "runtime/thread.inline.hpp"
 #ifdef TARGET_OS_FAMILY_linux
 # include "os_linux.inline.hpp"
 #endif
 #ifdef TARGET_OS_FAMILY_solaris
 # include "os_solaris.inline.hpp"
 #endif
 #ifdef TARGET_OS_FAMILY_windows
 # include "os_windows.inline.hpp"
 #endif
 #ifdef TARGET_OS_FAMILY_bsd
 # include "os_bsd.inline.hpp"
 #endif
 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
 #ifdef ASSERT
 oop* HandleArea::allocate_handle(oop obj) {
   assert(_handle_mark_nesting > 1, "memory leak: allocating handle outside HandleMark");
   assert(_no_handle_mark_nesting == 0, "allocating handle inside NoHandleMark");
   assert(obj->is_oop(), err_msg("not an oop: " INTPTR_FORMAT, (intptr_t*) obj));
   return real_allocate_handle(obj);
 }
 Handle::Handle(Thread* thread, oop obj) {
   assert(thread == Thread::current(), "sanity check");
   if (obj == NULL) {
     _handle = NULL;
   } else {
     _handle = thread->handle_area()->allocate_handle(obj);
   }
 }
 #endif
 static uintx chunk_oops_do(OopClosure* f, Chunk* chunk, char* chunk_top) {
   oop* bottom = (oop*) chunk->bottom();
   oop* top    = (oop*) chunk_top;
   uintx handles_visited = top - bottom;
   assert(top >= bottom && top <= (oop*) chunk->top(), "just checking");
   // during GC phase 3, a handle may be a forward pointer that
   // is not yet valid, so loosen the assertion
   while (bottom < top) {
     // This test can be moved up but for now check every oop.
     assert((*bottom)->is_oop(), "handle should point to oop");
     f->do_oop(bottom++);
   }
   return handles_visited;
 }
 // Used for debugging handle allocation.
 NOT_PRODUCT(jint _nof_handlemarks  = 0;)
 void HandleArea::oops_do(OopClosure* f) {
   uintx handles_visited = 0;
   // First handle the current chunk. It is filled to the high water mark.
   handles_visited += chunk_oops_do(f, _chunk, _hwm);
   // Then handle all previous chunks. They are completely filled.
   Chunk* k = _first;
   while(k != _chunk) {
     handles_visited += chunk_oops_do(f, k, k->top());
     k = k->next();
   }
   // The thread local handle areas should not get very large
   if (TraceHandleAllocation && handles_visited > TotalHandleAllocationLimit) {
 #ifdef ASSERT
     warning("%d: Visited in HandleMark : %d",
       _nof_handlemarks, handles_visited);
 #else
     warning("Visited in HandleMark : %d", handles_visited);
 #endif
   }
   if (_prev != NULL) _prev->oops_do(f);
 }
 void HandleMark::initialize(Thread* thread) {
   _thread = thread;
   // Save area
   _area  = thread->handle_area();
   // Save current top
   _chunk = _area->_chunk;
   _hwm   = _area->_hwm;
   _max   = _area->_max;
   _size_in_bytes = _area->_size_in_bytes;
   debug_only(_area->_handle_mark_nesting++);
   assert(_area->_handle_mark_nesting > 0, "must stack allocate HandleMarks");
   debug_only(Atomic::inc(&_nof_handlemarks);)
   // Link this in the thread
   set_previous_handle_mark(thread->last_handle_mark());
   thread->set_last_handle_mark(this);
 }
 HandleMark::~HandleMark() {
   HandleArea* area = _area;   // help compilers with poor alias analysis
   assert(area == _thread->handle_area(), "sanity check");
   assert(area->_handle_mark_nesting > 0, "must stack allocate HandleMarks" );
   debug_only(area->_handle_mark_nesting--);
   // Debug code to trace the number of handles allocated per mark/
 #ifdef ASSERT
   if (TraceHandleAllocation) {
     size_t handles = 0;
     Chunk *c = _chunk->next();
     if (c == NULL) {
       handles = area->_hwm - _hwm; // no new chunk allocated
     } else {
       handles = _max - _hwm;      // add rest in first chunk
       while(c != NULL) {
         handles += c->length();
         c = c->next();
       }
       handles -= area->_max - area->_hwm; // adjust for last trunk not full
     }
     handles /= sizeof(void *); // Adjust for size of a handle
     if (handles > HandleAllocationLimit) {
       // Note: _nof_handlemarks is only set in debug mode
       warning("%d: Allocated in HandleMark : %d", _nof_handlemarks, handles);
     }
     tty->print_cr("Handles %d", handles);
   }
 #endif
   // Delete later chunks
   if( _chunk->next() ) {
     // reset arena size before delete chunks. Otherwise, the total
     // arena size could exceed total chunk size
     assert(area->size_in_bytes() > size_in_bytes(), "Sanity check");
     area->set_size_in_bytes(size_in_bytes());
     _chunk->next_chop();
   } else {
     assert(area->size_in_bytes() == size_in_bytes(), "Sanity check");
   }
   // Roll back arena to saved top markers
   area->_chunk = _chunk;
   area->_hwm = _hwm;
   area->_max = _max;
 #ifdef ASSERT
   // clear out first chunk (to detect allocation bugs)
   if (ZapVMHandleArea) {
     memset(_hwm, badHandleValue, _max - _hwm);
   }
   Atomic::dec(&_nof_handlemarks);
 #endif
   // Unlink this from the thread
   _thread->set_last_handle_mark(previous_handle_mark());
 }
 void* HandleMark::operator new(size_t size) throw() {
   return AllocateHeap(size, mtThread);
 }
 void* HandleMark::operator new [] (size_t size) throw() {
   return AllocateHeap(size, mtThread);
 }
 void HandleMark::operator delete(void* p) {
   FreeHeap(p, mtThread);
 }
 void HandleMark::operator delete[](void* p) {
   FreeHeap(p, mtThread);
 }
 #ifdef ASSERT
 NoHandleMark::NoHandleMark() {
   HandleArea* area = Thread::current()->handle_area();
   area->_no_handle_mark_nesting++;
   assert(area->_no_handle_mark_nesting > 0, "must stack allocate NoHandleMark" );
 }
 NoHandleMark::~NoHandleMark() {
   HandleArea* area = Thread::current()->handle_area();
   assert(area->_no_handle_mark_nesting > 0, "must stack allocate NoHandleMark" );
   area->_no_handle_mark_nesting--;
 }
 ResetNoHandleMark::ResetNoHandleMark() {
   HandleArea* area = Thread::current()->handle_area();
   _no_handle_mark_nesting = area->_no_handle_mark_nesting;
   area->_no_handle_mark_nesting = 0;
 }
 ResetNoHandleMark::~ResetNoHandleMark() {
   HandleArea* area = Thread::current()->handle_area();
   area->_no_handle_mark_nesting = _no_handle_mark_nesting;
 }
 #endif

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/runtime/handles.cpp@eef07cd490d4 (annotated)

src/share/vm/runtime/handles.cpp