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src/share/vm/gc_implementation/parallelScavenge/vmPSOperations.cpp@04ff2f6cd0eb (annotated)

src/share/vm/gc_implementation/parallelScavenge/vmPSOperations.cpp

Tue, 17 Oct 2017 12:58:25 +0800

author

aoqi

date

Tue, 17 Oct 2017 12:58:25 +0800

changeset 7994

04ff2f6cd0eb

parent 7687

af8f16ac392c

parent 7535

7ae4e26cb1e0

child 9806

758c07667682

permissions

-rw-r--r--

merge

aoqi@0	1	/*
mlarsson@7686	2	* Copyright (c) 2007, 2015, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	#include "precompiled.hpp"
aoqi@0	26	#include "gc_implementation/parallelScavenge/parallelScavengeHeap.inline.hpp"
aoqi@0	27	#include "gc_implementation/parallelScavenge/psMarkSweep.hpp"
aoqi@0	28	#include "gc_implementation/parallelScavenge/psScavenge.hpp"
aoqi@0	29	#include "gc_implementation/parallelScavenge/psScavenge.inline.hpp"
aoqi@0	30	#include "gc_implementation/parallelScavenge/vmPSOperations.hpp"
aoqi@0	31	#include "memory/gcLocker.inline.hpp"
aoqi@0	32	#include "utilities/dtrace.hpp"
aoqi@0	33
aoqi@0	34	// The following methods are used by the parallel scavenge collector
mlarsson@7687	35	VM_ParallelGCFailedAllocation::VM_ParallelGCFailedAllocation(size_t word_size,
mlarsson@7686	36	uint gc_count) :
mlarsson@7687	37	VM_CollectForAllocation(word_size, gc_count, GCCause::_allocation_failure) {
mlarsson@7687	38	assert(word_size != 0, "An allocation should always be requested with this operation.");
aoqi@0	39	}
aoqi@0	40
aoqi@0	41	void VM_ParallelGCFailedAllocation::doit() {
aoqi@0	42	SvcGCMarker sgcm(SvcGCMarker::MINOR);
aoqi@0	43
aoqi@0	44	ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();
aoqi@0	45	assert(heap->kind() == CollectedHeap::ParallelScavengeHeap, "must be a ParallelScavengeHeap");
aoqi@0	46
aoqi@0	47	GCCauseSetter gccs(heap, _gc_cause);
mlarsson@7687	48	_result = heap->failed_mem_allocate(_word_size);
aoqi@0	49
aoqi@0	50	if (_result == NULL && GC_locker::is_active_and_needs_gc()) {
aoqi@0	51	set_gc_locked();
aoqi@0	52	}
aoqi@0	53	}
aoqi@0	54
aoqi@0	55	// Only used for System.gc() calls
mlarsson@7686	56	VM_ParallelGCSystemGC::VM_ParallelGCSystemGC(uint gc_count,
mlarsson@7686	57	uint full_gc_count,
aoqi@0	58	GCCause::Cause gc_cause) :
aoqi@0	59	VM_GC_Operation(gc_count, gc_cause, full_gc_count, true /* full */)
aoqi@0	60	{
aoqi@0	61	}
aoqi@0	62
aoqi@0	63	void VM_ParallelGCSystemGC::doit() {
aoqi@0	64	SvcGCMarker sgcm(SvcGCMarker::FULL);
aoqi@0	65
aoqi@0	66	ParallelScavengeHeap* heap = (ParallelScavengeHeap*)Universe::heap();
aoqi@0	67	assert(heap->kind() == CollectedHeap::ParallelScavengeHeap,
aoqi@0	68	"must be a ParallelScavengeHeap");
aoqi@0	69
aoqi@0	70	GCCauseSetter gccs(heap, _gc_cause);
tschatzl@7071	71	if (_gc_cause == GCCause::_gc_locker || _gc_cause == GCCause::_wb_young_gc
aoqi@0	72	DEBUG_ONLY(|| _gc_cause == GCCause::_scavenge_alot)) {
aoqi@0	73	// If (and only if) the scavenge fails, this will invoke a full gc.
aoqi@0	74	heap->invoke_scavenge();
aoqi@0	75	} else {
aoqi@0	76	heap->do_full_collection(false);
aoqi@0	77	}
aoqi@0	78	}