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src/share/vm/classfile/verificationType.cpp@ace99a6ffc83 (annotated)

src/share/vm/classfile/verificationType.cpp

Wed, 04 Jul 2012 15:55:45 -0400

author

coleenp

date

Wed, 04 Jul 2012 15:55:45 -0400

changeset 3904

ace99a6ffc83

parent 2708

1d1603768966

child 3992

4ee06e614636

permissions

-rw-r--r--

7181200: JVM new hashing code breaks SA in product mode
Summary: Made new_hash() overloaded rather than a virtual function so SA code doesn't need to be changed.
Reviewed-by: kvn, acorn, dholmes, fparain

duke@435	1	/*
trims@2708	2	* Copyright (c) 2003, 2011, 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/verificationType.hpp"
coleenp@2497	28	#include "classfile/verifier.hpp"
duke@435	29
duke@435	30	VerificationType VerificationType::from_tag(u1 tag) {
duke@435	31	switch (tag) {
duke@435	32	case ITEM_Top: return bogus_type();
duke@435	33	case ITEM_Integer: return integer_type();
duke@435	34	case ITEM_Float: return float_type();
duke@435	35	case ITEM_Double: return double_type();
duke@435	36	case ITEM_Long: return long_type();
duke@435	37	case ITEM_Null: return null_type();
duke@435	38	default:
duke@435	39	ShouldNotReachHere();
duke@435	40	return bogus_type();
duke@435	41	}
duke@435	42	}
duke@435	43
duke@435	44	bool VerificationType::is_reference_assignable_from(
coleenp@2497	45	const VerificationType& from, ClassVerifier* context, TRAPS) const {
coleenp@2497	46	instanceKlassHandle klass = context->current_class();
duke@435	47	if (from.is_null()) {
duke@435	48	// null is assignable to any reference
duke@435	49	return true;
duke@435	50	} else if (is_null()) {
duke@435	51	return false;
duke@435	52	} else if (name() == from.name()) {
duke@435	53	return true;
duke@435	54	} else if (is_object()) {
duke@435	55	// We need check the class hierarchy to check assignability
duke@435	56	if (name() == vmSymbols::java_lang_Object()) {
duke@435	57	// any object or array is assignable to java.lang.Object
duke@435	58	return true;
duke@435	59	}
kamg@2158	60	klassOop obj = SystemDictionary::resolve_or_fail(
coleenp@2497	61	name(), Handle(THREAD, klass->class_loader()),
coleenp@2497	62	Handle(THREAD, klass->protection_domain()), true, CHECK_false);
kamg@2158	63	KlassHandle this_class(THREAD, obj);
kamg@2158	64
kamg@2158	65	if (this_class->is_interface()) {
duke@435	66	// We treat interfaces as java.lang.Object, including
duke@435	67	// java.lang.Cloneable and java.io.Serializable
duke@435	68	return true;
duke@435	69	} else if (from.is_object()) {
duke@435	70	klassOop from_class = SystemDictionary::resolve_or_fail(
coleenp@2497	71	from.name(), Handle(THREAD, klass->class_loader()),
coleenp@2497	72	Handle(THREAD, klass->protection_domain()), true, CHECK_false);
kamg@2158	73	return instanceKlass::cast(from_class)->is_subclass_of(this_class());
duke@435	74	}
duke@435	75	} else if (is_array() && from.is_array()) {
coleenp@2497	76	VerificationType comp_this = get_component(context, CHECK_false);
coleenp@2497	77	VerificationType comp_from = from.get_component(context, CHECK_false);
apangin@2032	78	if (!comp_this.is_bogus() && !comp_from.is_bogus()) {
apangin@2032	79	return comp_this.is_assignable_from(comp_from, context, CHECK_false);
apangin@2032	80	}
duke@435	81	}
duke@435	82	return false;
duke@435	83	}
duke@435	84
coleenp@2497	85	VerificationType VerificationType::get_component(ClassVerifier *context, TRAPS) const {
duke@435	86	assert(is_array() && name()->utf8_length() >= 2, "Must be a valid array");
coleenp@2497	87	Symbol* component;
duke@435	88	switch (name()->byte_at(1)) {
duke@435	89	case 'Z': return VerificationType(Boolean);
duke@435	90	case 'B': return VerificationType(Byte);
duke@435	91	case 'C': return VerificationType(Char);
duke@435	92	case 'S': return VerificationType(Short);
duke@435	93	case 'I': return VerificationType(Integer);
duke@435	94	case 'J': return VerificationType(Long);
duke@435	95	case 'F': return VerificationType(Float);
duke@435	96	case 'D': return VerificationType(Double);
duke@435	97	case '[':
coleenp@2497	98	component = context->create_temporary_symbol(
duke@435	99	name(), 1, name()->utf8_length(),
duke@435	100	CHECK_(VerificationType::bogus_type()));
duke@435	101	return VerificationType::reference_type(component);
duke@435	102	case 'L':
coleenp@2497	103	component = context->create_temporary_symbol(
duke@435	104	name(), 2, name()->utf8_length() - 1,
duke@435	105	CHECK_(VerificationType::bogus_type()));
duke@435	106	return VerificationType::reference_type(component);
duke@435	107	default:
apangin@2032	108	// Met an invalid type signature, e.g. [X
duke@435	109	return VerificationType::bogus_type();
duke@435	110	}
duke@435	111	}
duke@435	112
duke@435	113	#ifndef PRODUCT
duke@435	114
duke@435	115	void VerificationType::print_on(outputStream* st) const {
duke@435	116	switch (_u._data) {
duke@435	117	case Bogus: st->print(" bogus "); break;
duke@435	118	case Category1: st->print(" category1 "); break;
duke@435	119	case Category2: st->print(" category2 "); break;
duke@435	120	case Category2_2nd: st->print(" category2_2nd "); break;
duke@435	121	case Boolean: st->print(" boolean "); break;
duke@435	122	case Byte: st->print(" byte "); break;
duke@435	123	case Short: st->print(" short "); break;
duke@435	124	case Char: st->print(" char "); break;
duke@435	125	case Integer: st->print(" integer "); break;
duke@435	126	case Float: st->print(" float "); break;
duke@435	127	case Long: st->print(" long "); break;
duke@435	128	case Double: st->print(" double "); break;
duke@435	129	case Long_2nd: st->print(" long_2nd "); break;
duke@435	130	case Double_2nd: st->print(" double_2nd "); break;
duke@435	131	case Null: st->print(" null "); break;
duke@435	132	default:
duke@435	133	if (is_uninitialized_this()) {
duke@435	134	st->print(" uninitializedThis ");
duke@435	135	} else if (is_uninitialized()) {
duke@435	136	st->print(" uninitialized %d ", bci());
duke@435	137	} else {
duke@435	138	st->print(" class %s ", name()->as_klass_external_name());
duke@435	139	}
duke@435	140	}
duke@435	141	}
duke@435	142
duke@435	143	#endif