• file
• revisions
• annotate
• diff
• comparison
• raw

src/share/vm/memory/sharedHeap.cpp@c39172598323 (annotated)

src/share/vm/memory/sharedHeap.cpp

Mon, 23 Mar 2020 17:57:13 +0000

author

poonam

date

Mon, 23 Mar 2020 17:57:13 +0000

changeset 9965

c39172598323

parent 7659

38d6febe66af

child 7994

04ff2f6cd0eb

permissions

-rw-r--r--

8231779: crash HeapWord*ParallelScavengeHeap::failed_mem_allocate
Reviewed-by: dlong, tschatzl, pliden

duke@435	1	/*
drchase@6680	2	* Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
stefank@2314	25	#include "precompiled.hpp"
stefank@2314	26	#include "classfile/symbolTable.hpp"
stefank@2314	27	#include "classfile/systemDictionary.hpp"
stefank@2314	28	#include "code/codeCache.hpp"
stefank@2314	29	#include "gc_interface/collectedHeap.inline.hpp"
stefank@2314	30	#include "memory/sharedHeap.hpp"
stefank@2314	31	#include "oops/oop.inline.hpp"
stefank@6992	32	#include "runtime/atomic.inline.hpp"
stefank@2314	33	#include "runtime/fprofiler.hpp"
stefank@2314	34	#include "runtime/java.hpp"
stefank@2314	35	#include "utilities/copy.hpp"
stefank@2314	36	#include "utilities/workgroup.hpp"
duke@435	37
drchase@6680	38	PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
drchase@6680	39
duke@435	40	SharedHeap* SharedHeap::_sh;
duke@435	41
duke@435	42	SharedHeap::SharedHeap(CollectorPolicy* policy_) :
duke@435	43	CollectedHeap(),
duke@435	44	_collector_policy(policy_),
coleenp@4037	45	_rem_set(NULL),
duke@435	46	_strong_roots_parity(0),
jmasa@2188	47	_workers(NULL)
duke@435	48	{
duke@435	49	_sh = this; // ch is static, should be set only once.
duke@435	50	if ((UseParNewGC ||
jmasa@5461	51	(UseConcMarkSweepGC && (CMSParallelInitialMarkEnabled ||
jmasa@5461	52	CMSParallelRemarkEnabled)) ||
ysr@777	53	UseG1GC) &&
duke@435	54	ParallelGCThreads > 0) {
jmasa@2188	55	_workers = new FlexibleWorkGang("Parallel GC Threads", ParallelGCThreads,
ysr@777	56	/* are_GC_task_threads */true,
ysr@777	57	/* are_ConcurrentGC_threads */false);
duke@435	58	if (_workers == NULL) {
duke@435	59	vm_exit_during_initialization("Failed necessary allocation.");
jmasa@2188	60	} else {
jmasa@2188	61	_workers->initialize_workers();
duke@435	62	}
duke@435	63	}
duke@435	64	}
duke@435	65
ysr@777	66	bool SharedHeap::heap_lock_held_for_gc() {
ysr@777	67	Thread* t = Thread::current();
ysr@777	68	return Heap_lock->owned_by_self()
ysr@777	69	|| ( (t->is_GC_task_thread() || t->is_VM_thread())
ysr@777	70	&& _thread_holds_heap_lock_for_gc);
ysr@777	71	}
duke@435	72
jmasa@3357	73	void SharedHeap::set_par_threads(uint t) {
jmasa@2188	74	assert(t == 0 || !UseSerialGC, "Cannot have parallel threads");
duke@435	75	_n_par_threads = t;
stefank@6992	76	}
stefank@6992	77
duke@435	78	void SharedHeap::change_strong_roots_parity() {
duke@435	79	// Also set the new collection parity.
duke@435	80	assert(_strong_roots_parity >= 0 && _strong_roots_parity <= 2,
duke@435	81	"Not in range.");
duke@435	82	_strong_roots_parity++;
duke@435	83	if (_strong_roots_parity == 3) _strong_roots_parity = 1;
duke@435	84	assert(_strong_roots_parity >= 1 && _strong_roots_parity <= 2,
duke@435	85	"Not in range.");
duke@435	86	}
duke@435	87
stefank@6992	88	SharedHeap::StrongRootsScope::StrongRootsScope(SharedHeap* heap, bool activate)
mgerdin@7659	89	: MarkScope(activate), _sh(heap)
jrose@1424	90	{
jrose@1424	91	if (_active) {
stefank@6992	92	_sh->change_strong_roots_parity();
johnc@5277	93	// Zero the claimed high water mark in the StringTable
johnc@5277	94	StringTable::clear_parallel_claimed_index();
jrose@1424	95	}
jrose@1424	96	}
jrose@1424	97
duke@435	98	void SharedHeap::set_barrier_set(BarrierSet* bs) {
duke@435	99	_barrier_set = bs;
duke@435	100	// Cached barrier set for fast access in oops
duke@435	101	oopDesc::set_bs(bs);
duke@435	102	}
duke@435	103
duke@435	104	void SharedHeap::post_initialize() {
jwilhelm@6085	105	CollectedHeap::post_initialize();
duke@435	106	ref_processing_init();
duke@435	107	}
duke@435	108
coleenp@4037	109	void SharedHeap::ref_processing_init() {}
duke@435	110
duke@435	111	// Some utilities.
ysr@777	112	void SharedHeap::print_size_transition(outputStream* out,
ysr@777	113	size_t bytes_before,
duke@435	114	size_t bytes_after,
duke@435	115	size_t capacity) {
ysr@777	116	out->print(" %d%s->%d%s(%d%s)",
duke@435	117	byte_size_in_proper_unit(bytes_before),
duke@435	118	proper_unit_for_byte_size(bytes_before),
duke@435	119	byte_size_in_proper_unit(bytes_after),
duke@435	120	proper_unit_for_byte_size(bytes_after),
duke@435	121	byte_size_in_proper_unit(capacity),
duke@435	122	proper_unit_for_byte_size(capacity));
duke@435	123	}