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

src/share/vm/code/oopRecorder.cpp@f95d63e2154a (annotated)

src/share/vm/code/oopRecorder.cpp

Tue, 23 Nov 2010 13:22:55 -0800

author

stefank

date

Tue, 23 Nov 2010 13:22:55 -0800

changeset 2314

f95d63e2154a

parent 1934

e9ff18c4ace7

child 4037

da91efe96a93

permissions

-rw-r--r--

6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg

duke@435	1	/*
jrose@1934	2	* Copyright (c) 1998, 2010, 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 "code/oopRecorder.hpp"
stefank@2314	27	#include "memory/allocation.inline.hpp"
stefank@2314	28	#include "oops/oop.inline.hpp"
duke@435	29
duke@435	30	#ifdef ASSERT
duke@435	31	int OopRecorder::_find_index_calls = 0;
duke@435	32	int OopRecorder::_hit_indexes = 0;
duke@435	33	int OopRecorder::_missed_indexes = 0;
duke@435	34	#endif //ASSERT
duke@435	35
duke@435	36
duke@435	37	OopRecorder::OopRecorder(Arena* arena) {
duke@435	38	_handles = NULL;
duke@435	39	_indexes = NULL;
duke@435	40	_arena = arena;
duke@435	41	_complete = false;
duke@435	42	}
duke@435	43
duke@435	44	OopRecorder::IndexCache::IndexCache() {
duke@435	45	assert(first_index > 0, "initial zero state of cache must be invalid index");
duke@435	46	Copy::zero_to_bytes(&_cache[0], sizeof(_cache));
duke@435	47	}
duke@435	48
duke@435	49	int OopRecorder::oop_size() {
duke@435	50	_complete = true;
duke@435	51	if (_handles == NULL) return 0;
duke@435	52	return _handles->length() * sizeof(oop);
duke@435	53	}
duke@435	54
twisti@1918	55	void OopRecorder::copy_to(nmethod* nm) {
duke@435	56	assert(_complete, "must be frozen");
duke@435	57	maybe_initialize(); // get non-null handles, even if we have no oops
twisti@1918	58	nm->copy_oops(_handles);
duke@435	59	}
duke@435	60
duke@435	61	void OopRecorder::maybe_initialize() {
duke@435	62	if (_handles == NULL) {
duke@435	63	if (_arena != NULL) {
duke@435	64	_handles = new(_arena) GrowableArray<jobject>(_arena, 10, 0, 0);
duke@435	65	_no_finds = new(_arena) GrowableArray<int>( _arena, 10, 0, 0);
duke@435	66	} else {
duke@435	67	_handles = new GrowableArray<jobject>(10, 0, 0);
duke@435	68	_no_finds = new GrowableArray<int>( 10, 0, 0);
duke@435	69	}
duke@435	70	}
duke@435	71	}
duke@435	72
duke@435	73
duke@435	74	jobject OopRecorder::handle_at(int index) {
duke@435	75	// there is always a NULL virtually present as first object
duke@435	76	if (index == null_index) return NULL;
duke@435	77	return _handles->at(index - first_index);
duke@435	78	}
duke@435	79
duke@435	80
duke@435	81	// Local definition. Used only in this module.
duke@435	82	inline bool OopRecorder::is_real_jobject(jobject h) {
duke@435	83	return h != NULL && h != (jobject)Universe::non_oop_word();
duke@435	84	}
duke@435	85
duke@435	86
duke@435	87	int OopRecorder::add_handle(jobject h, bool make_findable) {
duke@435	88	assert(!_complete, "cannot allocate more elements after size query");
duke@435	89	maybe_initialize();
duke@435	90	// indexing uses 1 as an origin--0 means null
duke@435	91	int index = _handles->length() + first_index;
duke@435	92	_handles->append(h);
duke@435	93
duke@435	94	// Support correct operation of find_index().
duke@435	95	assert(!(make_findable && !is_real_jobject(h)), "nulls are not findable");
duke@435	96	if (make_findable) {
duke@435	97	// This index may be returned from find_index().
duke@435	98	if (_indexes != NULL) {
duke@435	99	int* cloc = _indexes->cache_location(h);
duke@435	100	_indexes->set_cache_location_index(cloc, index);
duke@435	101	} else if (index == index_cache_threshold && _arena != NULL) {
duke@435	102	_indexes = new(_arena) IndexCache();
duke@435	103	for (int i = 0; i < _handles->length(); i++) {
duke@435	104	// Load the cache with pre-existing elements.
duke@435	105	int index0 = i + first_index;
duke@435	106	if (_no_finds->contains(index0)) continue;
duke@435	107	int* cloc = _indexes->cache_location(_handles->at(i));
duke@435	108	_indexes->set_cache_location_index(cloc, index0);
duke@435	109	}
duke@435	110	}
duke@435	111	} else if (is_real_jobject(h)) {
duke@435	112	// Remember that this index is not to be returned from find_index().
duke@435	113	// This case is rare, because most or all uses of allocate_index pass
duke@435	114	// a jobject argument of NULL or Universe::non_oop_word.
duke@435	115	// Thus, the expected length of _no_finds is zero.
duke@435	116	_no_finds->append(index);
duke@435	117	}
duke@435	118
duke@435	119	return index;
duke@435	120	}
duke@435	121
duke@435	122
duke@435	123	int OopRecorder::maybe_find_index(jobject h) {
duke@435	124	debug_only(_find_index_calls++);
duke@435	125	assert(!_complete, "cannot allocate more elements after size query");
duke@435	126	maybe_initialize();
duke@435	127	if (h == NULL) return null_index;
duke@435	128	assert(is_real_jobject(h), "must be valid jobject");
duke@435	129	int* cloc = (_indexes == NULL)? NULL: _indexes->cache_location(h);
duke@435	130	if (cloc != NULL) {
duke@435	131	int cindex = _indexes->cache_location_index(cloc);
duke@435	132	if (cindex == 0) {
duke@435	133	return -1; // We know this handle is completely new.
duke@435	134	}
duke@435	135	if (cindex >= first_index && _handles->at(cindex - first_index) == h) {
duke@435	136	debug_only(_hit_indexes++);
duke@435	137	return cindex;
duke@435	138	}
duke@435	139	if (!_indexes->cache_location_collision(cloc)) {
duke@435	140	return -1; // We know the current cache occupant is unique to that cloc.
duke@435	141	}
duke@435	142	}
duke@435	143
duke@435	144	// Not found in cache, due to a cache collision. (Or, no cache at all.)
duke@435	145	// Do a linear search, most recent to oldest.
duke@435	146	for (int i = _handles->length() - 1; i >= 0; i--) {
duke@435	147	if (_handles->at(i) == h) {
duke@435	148	int findex = i + first_index;
duke@435	149	if (_no_finds->contains(findex)) continue; // oops; skip this one
duke@435	150	if (cloc != NULL) {
duke@435	151	_indexes->set_cache_location_index(cloc, findex);
duke@435	152	}
duke@435	153	debug_only(_missed_indexes++);
duke@435	154	return findex;
duke@435	155	}
duke@435	156	}
duke@435	157	return -1;
duke@435	158	}