jdk8-mips64-public/hotspot: src/share/vm/memory/permGen.cpp@52e32c8b317e (annotated)

src/share/vm/memory/permGen.cpp@52e32c8b317e (annotated)

src/share/vm/memory/permGen.cpp

Wed, 22 Oct 2008 14:48:08 -0400

author: acorn
date: Wed, 22 Oct 2008 14:48:08 -0400
changeset 843: 52e32c8b317e
parent 631: d1605aabd0a1
child 915: d249b360e026
permissions: -rw-r--r--

6761092: jvm crashes when CDS is enabled.
Summary: CDS hardcoded max c++ virtual method table increased
Reviewed-by: coleenp, xlu, jmasa

 /*
  * Copyright 2000-2008 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
  * CA 95054 USA or visit www.sun.com if you need additional information or
  * have any questions.
  *
  */
 #include "incls/_precompiled.incl"
 #include "incls/_permGen.cpp.incl"
 HeapWord* PermGen::mem_allocate_in_gen(size_t size, Generation* gen) {
   MutexLocker ml(Heap_lock);
   GCCause::Cause next_cause = GCCause::_permanent_generation_full;
   GCCause::Cause prev_cause = GCCause::_no_gc;
   for (;;) {
     HeapWord* obj = gen->allocate(size, false);
     if (obj != NULL) {
       return obj;
     }
     if (gen->capacity() < _capacity_expansion_limit ||
         prev_cause != GCCause::_no_gc) {
       obj = gen->expand_and_allocate(size, false);
     }
     if (obj == NULL && prev_cause != GCCause::_last_ditch_collection) {
       if (GC_locker::is_active_and_needs_gc()) {
         // If this thread is not in a jni critical section, we stall
         // the requestor until the critical section has cleared and
         // GC allowed. When the critical section clears, a GC is
         // initiated by the last thread exiting the critical section; so
         // we retry the allocation sequence from the beginning of the loop,
         // rather than causing more, now probably unnecessary, GC attempts.
         JavaThread* jthr = JavaThread::current();
         if (!jthr->in_critical()) {
           MutexUnlocker mul(Heap_lock);
           // Wait for JNI critical section to be exited
           GC_locker::stall_until_clear();
           continue;
         } else {
           if (CheckJNICalls) {
             fatal("Possible deadlock due to allocating while"
                   " in jni critical section");
           }
           return NULL;
         }
       }
       // Read the GC count while holding the Heap_lock
       unsigned int gc_count_before      = SharedHeap::heap()->total_collections();
       unsigned int full_gc_count_before = SharedHeap::heap()->total_full_collections();
       {
         MutexUnlocker mu(Heap_lock);  // give up heap lock, execute gets it back
         VM_GenCollectForPermanentAllocation op(size, gc_count_before, full_gc_count_before,
                                                next_cause);
         VMThread::execute(&op);
         if (!op.prologue_succeeded() || op.gc_locked()) {
           assert(op.result() == NULL, "must be NULL if gc_locked() is true");
           continue;  // retry and/or stall as necessary
         }
         obj = op.result();
         assert(obj == NULL || SharedHeap::heap()->is_in_reserved(obj),
                "result not in heap");
         if (obj != NULL) {
           return obj;
         }
       }
       prev_cause = next_cause;
       next_cause = GCCause::_last_ditch_collection;
     } else {
       return obj;
     }
   }
 }
 CompactingPermGen::CompactingPermGen(ReservedSpace rs,
                                      ReservedSpace shared_rs,
                                      size_t initial_byte_size,
                                      GenRemSet* remset,
                                      PermanentGenerationSpec* perm_spec)
 {
   CompactingPermGenGen* g =
     new CompactingPermGenGen(rs, shared_rs, initial_byte_size, -1, remset,
                              NULL, perm_spec);
   if (g == NULL)
     vm_exit_during_initialization("Could not allocate a CompactingPermGen");
   _gen = g;
   g->initialize_performance_counters();
   _capacity_expansion_limit = g->capacity() + MaxPermHeapExpansion;
 }
 HeapWord* CompactingPermGen::mem_allocate(size_t size) {
   return mem_allocate_in_gen(size, _gen);
 }
 void CompactingPermGen::compute_new_size() {
   size_t desired_capacity = align_size_up(_gen->used(), MinPermHeapExpansion);
   if (desired_capacity < PermSize) {
     desired_capacity = PermSize;
   }
   if (_gen->capacity() > desired_capacity) {
     _gen->shrink(_gen->capacity() - desired_capacity);
   }
   _capacity_expansion_limit = _gen->capacity() + MaxPermHeapExpansion;
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/memory/permGen.cpp@52e32c8b317e (annotated)

src/share/vm/memory/permGen.cpp