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src/share/vm/code/scopeDesc.cpp@1d037ecd7960 (annotated)

src/share/vm/code/scopeDesc.cpp

Wed, 08 Apr 2009 00:12:59 -0700

author

jrose

date

Wed, 08 Apr 2009 00:12:59 -0700

changeset 1144

1d037ecd7960

parent 631

d1605aabd0a1

child 1335

9987d9d5eb0e

permissions

-rw-r--r--

6827505: sizing logic for vtable and itable stubs needs self-check
Summary: Asserts and comments to help maintain the correct sizing of certain stubs
Reviewed-by: kvn

duke@435	1	/*
xdono@631	2	* Copyright 1997-2008 Sun Microsystems, Inc. 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	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	# include "incls/_precompiled.incl"
duke@435	26	# include "incls/_scopeDesc.cpp.incl"
duke@435	27
duke@435	28
duke@435	29	ScopeDesc::ScopeDesc(const nmethod* code, int decode_offset, int obj_decode_offset) {
duke@435	30	_code = code;
duke@435	31	_decode_offset = decode_offset;
duke@435	32	_objects = decode_object_values(obj_decode_offset);
duke@435	33	decode_body();
duke@435	34	}
duke@435	35
duke@435	36	ScopeDesc::ScopeDesc(const nmethod* code, int decode_offset) {
duke@435	37	_code = code;
duke@435	38	_decode_offset = decode_offset;
duke@435	39	_objects = decode_object_values(DebugInformationRecorder::serialized_null);
duke@435	40	decode_body();
duke@435	41	}
duke@435	42
duke@435	43
duke@435	44	ScopeDesc::ScopeDesc(const ScopeDesc* parent) {
duke@435	45	_code = parent->_code;
duke@435	46	_decode_offset = parent->_sender_decode_offset;
duke@435	47	_objects = parent->_objects;
duke@435	48	decode_body();
duke@435	49	}
duke@435	50
duke@435	51
duke@435	52	void ScopeDesc::decode_body() {
duke@435	53	if (decode_offset() == DebugInformationRecorder::serialized_null) {
duke@435	54	// This is a sentinel record, which is only relevant to
duke@435	55	// approximate queries. Decode a reasonable frame.
duke@435	56	_sender_decode_offset = DebugInformationRecorder::serialized_null;
duke@435	57	_method = methodHandle(_code->method());
duke@435	58	_bci = InvocationEntryBci;
duke@435	59	_locals_decode_offset = DebugInformationRecorder::serialized_null;
duke@435	60	_expressions_decode_offset = DebugInformationRecorder::serialized_null;
duke@435	61	_monitors_decode_offset = DebugInformationRecorder::serialized_null;
duke@435	62	} else {
duke@435	63	// decode header
duke@435	64	DebugInfoReadStream* stream = stream_at(decode_offset());
duke@435	65
duke@435	66	_sender_decode_offset = stream->read_int();
duke@435	67	_method = methodHandle((methodOop) stream->read_oop());
duke@435	68	_bci = stream->read_bci();
duke@435	69	// decode offsets for body and sender
duke@435	70	_locals_decode_offset = stream->read_int();
duke@435	71	_expressions_decode_offset = stream->read_int();
duke@435	72	_monitors_decode_offset = stream->read_int();
duke@435	73	}
duke@435	74	}
duke@435	75
duke@435	76
duke@435	77	GrowableArray<ScopeValue*>* ScopeDesc::decode_scope_values(int decode_offset) {
duke@435	78	if (decode_offset == DebugInformationRecorder::serialized_null) return NULL;
duke@435	79	DebugInfoReadStream* stream = stream_at(decode_offset);
duke@435	80	int length = stream->read_int();
duke@435	81	GrowableArray<ScopeValue*>* result = new GrowableArray<ScopeValue*> (length);
duke@435	82	for (int index = 0; index < length; index++) {
duke@435	83	result->push(ScopeValue::read_from(stream));
duke@435	84	}
duke@435	85	return result;
duke@435	86	}
duke@435	87
duke@435	88	GrowableArray<ScopeValue*>* ScopeDesc::decode_object_values(int decode_offset) {
duke@435	89	if (decode_offset == DebugInformationRecorder::serialized_null) return NULL;
duke@435	90	GrowableArray<ScopeValue*>* result = new GrowableArray<ScopeValue*>();
duke@435	91	DebugInfoReadStream* stream = new DebugInfoReadStream(_code, decode_offset, result);
duke@435	92	int length = stream->read_int();
duke@435	93	for (int index = 0; index < length; index++) {
kvn@479	94	// Objects values are pushed to 'result' array during read so that
kvn@479	95	// object's fields could reference it (OBJECT_ID_CODE).
kvn@479	96	(void)ScopeValue::read_from(stream);
duke@435	97	}
duke@435	98	assert(result->length() == length, "inconsistent debug information");
duke@435	99	return result;
duke@435	100	}
duke@435	101
duke@435	102
duke@435	103	GrowableArray<MonitorValue*>* ScopeDesc::decode_monitor_values(int decode_offset) {
duke@435	104	if (decode_offset == DebugInformationRecorder::serialized_null) return NULL;
duke@435	105	DebugInfoReadStream* stream = stream_at(decode_offset);
duke@435	106	int length = stream->read_int();
duke@435	107	GrowableArray<MonitorValue*>* result = new GrowableArray<MonitorValue*> (length);
duke@435	108	for (int index = 0; index < length; index++) {
duke@435	109	result->push(new MonitorValue(stream));
duke@435	110	}
duke@435	111	return result;
duke@435	112	}
duke@435	113
duke@435	114	DebugInfoReadStream* ScopeDesc::stream_at(int decode_offset) const {
duke@435	115	return new DebugInfoReadStream(_code, decode_offset, _objects);
duke@435	116	}
duke@435	117
duke@435	118	GrowableArray<ScopeValue*>* ScopeDesc::locals() {
duke@435	119	return decode_scope_values(_locals_decode_offset);
duke@435	120	}
duke@435	121
duke@435	122	GrowableArray<ScopeValue*>* ScopeDesc::expressions() {
duke@435	123	return decode_scope_values(_expressions_decode_offset);
duke@435	124	}
duke@435	125
duke@435	126	GrowableArray<MonitorValue*>* ScopeDesc::monitors() {
duke@435	127	return decode_monitor_values(_monitors_decode_offset);
duke@435	128	}
duke@435	129
duke@435	130	GrowableArray<ScopeValue*>* ScopeDesc::objects() {
duke@435	131	return _objects;
duke@435	132	}
duke@435	133
duke@435	134	bool ScopeDesc::is_top() const {
duke@435	135	return _sender_decode_offset == DebugInformationRecorder::serialized_null;
duke@435	136	}
duke@435	137
duke@435	138	ScopeDesc* ScopeDesc::sender() const {
duke@435	139	if (is_top()) return NULL;
duke@435	140	return new ScopeDesc(this);
duke@435	141	}
duke@435	142
duke@435	143
duke@435	144	#ifndef PRODUCT
duke@435	145
duke@435	146	void ScopeDesc::print_value_on(outputStream* st) const {
duke@435	147	tty->print(" ");
duke@435	148	method()()->print_short_name(st);
duke@435	149	int lineno = method()->line_number_from_bci(bci());
duke@435	150	if (lineno != -1) {
duke@435	151	st->print_cr("@%d (line %d)", bci(), lineno);
duke@435	152	} else {
duke@435	153	st->print_cr("@%d", bci());
duke@435	154	}
duke@435	155	}
duke@435	156
duke@435	157	void ScopeDesc::print_on(outputStream* st) const {
duke@435	158	print_on(st, NULL);
duke@435	159	}
duke@435	160
duke@435	161	void ScopeDesc::print_on(outputStream* st, PcDesc* pd) const {
duke@435	162	// header
duke@435	163	if (pd != NULL) {
duke@435	164	tty->print_cr("ScopeDesc(pc=" PTR_FORMAT " offset=%x):", pd->real_pc(_code), pd->pc_offset());
duke@435	165	}
duke@435	166
duke@435	167	print_value_on(st);
duke@435	168	// decode offsets
duke@435	169	if (WizardMode) {
duke@435	170	st->print("ScopeDesc[%d]@" PTR_FORMAT " ", _decode_offset, _code->instructions_begin());
duke@435	171	st->print_cr(" offset: %d", _decode_offset);
duke@435	172	st->print_cr(" bci: %d", bci());
duke@435	173	st->print_cr(" locals: %d", _locals_decode_offset);
duke@435	174	st->print_cr(" stack: %d", _expressions_decode_offset);
duke@435	175	st->print_cr(" monitor: %d", _monitors_decode_offset);
duke@435	176	st->print_cr(" sender: %d", _sender_decode_offset);
duke@435	177	}
duke@435	178	// locals
duke@435	179	{ GrowableArray<ScopeValue*>* l = ((ScopeDesc*) this)->locals();
duke@435	180	if (l != NULL) {
duke@435	181	tty->print_cr(" Locals");
duke@435	182	for (int index = 0; index < l->length(); index++) {
duke@435	183	st->print(" - l%d: ", index);
duke@435	184	l->at(index)->print_on(st);
duke@435	185	st->cr();
duke@435	186	}
duke@435	187	}
duke@435	188	}
duke@435	189	// expressions
duke@435	190	{ GrowableArray<ScopeValue*>* l = ((ScopeDesc*) this)->expressions();
duke@435	191	if (l != NULL) {
duke@435	192	st->print_cr(" Expression stack");
duke@435	193	for (int index = 0; index < l->length(); index++) {
duke@435	194	st->print(" - @%d: ", index);
duke@435	195	l->at(index)->print_on(st);
duke@435	196	st->cr();
duke@435	197	}
duke@435	198	}
duke@435	199	}
duke@435	200	// monitors
duke@435	201	{ GrowableArray<MonitorValue*>* l = ((ScopeDesc*) this)->monitors();
duke@435	202	if (l != NULL) {
duke@435	203	st->print_cr(" Monitor stack");
duke@435	204	for (int index = 0; index < l->length(); index++) {
duke@435	205	st->print(" - @%d: ", index);
duke@435	206	l->at(index)->print_on(st);
duke@435	207	st->cr();
duke@435	208	}
duke@435	209	}
duke@435	210	}
duke@435	211
duke@435	212	#ifdef COMPILER2
duke@435	213	if (DoEscapeAnalysis && is_top() && _objects != NULL) {
duke@435	214	tty->print_cr("Objects");
duke@435	215	for (int i = 0; i < _objects->length(); i++) {
duke@435	216	ObjectValue* sv = (ObjectValue*) _objects->at(i);
duke@435	217	tty->print(" - %d: ", sv->id());
duke@435	218	sv->print_fields_on(tty);
duke@435	219	tty->cr();
duke@435	220	}
duke@435	221	}
duke@435	222	#endif // COMPILER2
duke@435	223	}
duke@435	224
duke@435	225	#endif
duke@435	226
duke@435	227	void ScopeDesc::verify() {
duke@435	228	ResourceMark rm;
duke@435	229	guarantee(method()->is_method(), "type check");
duke@435	230
duke@435	231	// check if we have any illegal elements on the expression stack
duke@435	232	{ GrowableArray<ScopeValue*>* l = expressions();
duke@435	233	if (l != NULL) {
duke@435	234	for (int index = 0; index < l->length(); index++) {
duke@435	235	//guarantee(!l->at(index)->is_illegal(), "expression element cannot be illegal");
duke@435	236	}
duke@435	237	}
duke@435	238	}
duke@435	239	}